./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0102-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety/test-0102-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/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 d10910cb8c44ec8f982d35122d9e66670129ee7c874265953b685f7f63a30072 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 22:48:04,900 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 22:48:04,952 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-08 22:48:04,956 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 22:48:04,957 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 22:48:04,976 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 22:48:04,978 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 22:48:04,978 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 22:48:04,978 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 22:48:04,979 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 22:48:04,979 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 22:48:04,979 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 22:48:04,979 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 22:48:04,980 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 22:48:04,980 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 22:48:04,980 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 22:48:04,980 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 22:48:04,980 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 22:48:04,981 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 22:48:04,981 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 22:48:04,981 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-08 22:48:04,981 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-08 22:48:04,981 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-08 22:48:04,981 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 22:48:04,981 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-08 22:48:04,981 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-08 22:48:04,981 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 22:48:04,981 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 22:48:04,981 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 22:48:04,981 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 22:48:04,981 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 22:48:04,982 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 22:48:04,982 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 22:48:04,982 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 22:48:04,982 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 22:48:04,982 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 22:48:04,982 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 22:48:04,982 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 22:48:04,983 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 22:48:04,983 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 22:48:04,983 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 22:48:04,983 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 22:48:04,983 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/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 -> d10910cb8c44ec8f982d35122d9e66670129ee7c874265953b685f7f63a30072 [2025-03-08 22:48:05,199 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 22:48:05,205 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 22:48:05,207 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 22:48:05,208 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 22:48:05,208 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 22:48:05,209 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0102-2.i [2025-03-08 22:48:06,313 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/532768c40/3e2a2be5a47049c195beb6b6549aa511/FLAGe23acc7bc [2025-03-08 22:48:06,559 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 22:48:06,560 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0102-2.i [2025-03-08 22:48:06,575 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/532768c40/3e2a2be5a47049c195beb6b6549aa511/FLAGe23acc7bc [2025-03-08 22:48:06,871 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/532768c40/3e2a2be5a47049c195beb6b6549aa511 [2025-03-08 22:48:06,872 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 22:48:06,873 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 22:48:06,874 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 22:48:06,874 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 22:48:06,877 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 22:48:06,878 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 10:48:06" (1/1) ... [2025-03-08 22:48:06,879 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27cc1f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:48:06, skipping insertion in model container [2025-03-08 22:48:06,879 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 10:48:06" (1/1) ... [2025-03-08 22:48:06,903 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 22:48:07,096 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 22:48:07,105 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) [2025-03-08 22:48:07,106 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3bd8dd63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:48:07, skipping insertion in model container [2025-03-08 22:48:07,107 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 22:48:07,107 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2025-03-08 22:48:07,110 INFO L158 Benchmark]: Toolchain (without parser) took 234.49ms. Allocated memory is still 142.6MB. Free memory was 107.9MB in the beginning and 95.8MB in the end (delta: 12.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-03-08 22:48:07,110 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 201.3MB. Free memory is still 124.2MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-08 22:48:07,110 INFO L158 Benchmark]: CACSL2BoogieTranslator took 232.71ms. Allocated memory is still 142.6MB. Free memory was 107.9MB in the beginning and 95.8MB in the end (delta: 12.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-03-08 22:48:07,111 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 201.3MB. Free memory is still 124.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 232.71ms. Allocated memory is still 142.6MB. Free memory was 107.9MB in the beginning and 95.8MB in the end (delta: 12.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 551]: 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/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety/test-0102-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/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 d10910cb8c44ec8f982d35122d9e66670129ee7c874265953b685f7f63a30072 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 22:48:08,650 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 22:48:08,720 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2025-03-08 22:48:08,724 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 22:48:08,724 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 22:48:08,743 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 22:48:08,744 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 22:48:08,744 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 22:48:08,745 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 22:48:08,745 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 22:48:08,745 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 22:48:08,746 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 22:48:08,746 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 22:48:08,746 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 22:48:08,746 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 22:48:08,747 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 22:48:08,747 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 22:48:08,747 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 22:48:08,747 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 22:48:08,747 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 22:48:08,747 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-08 22:48:08,747 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-08 22:48:08,747 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-08 22:48:08,747 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 22:48:08,748 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-08 22:48:08,748 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2025-03-08 22:48:08,748 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2025-03-08 22:48:08,748 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-08 22:48:08,748 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 22:48:08,748 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 22:48:08,748 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 22:48:08,748 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 22:48:08,748 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 22:48:08,748 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 22:48:08,749 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 22:48:08,749 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 22:48:08,749 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 22:48:08,749 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 22:48:08,749 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2025-03-08 22:48:08,749 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2025-03-08 22:48:08,749 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 22:48:08,749 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 22:48:08,749 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 22:48:08,750 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 22:48:08,750 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/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 -> d10910cb8c44ec8f982d35122d9e66670129ee7c874265953b685f7f63a30072 [2025-03-08 22:48:08,981 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 22:48:08,986 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 22:48:08,989 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 22:48:08,989 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 22:48:08,991 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 22:48:08,991 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0102-2.i [2025-03-08 22:48:10,138 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c639c0500/58b0f733397f480996aa47947747e460/FLAG677ebc066 [2025-03-08 22:48:10,358 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 22:48:10,361 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0102-2.i [2025-03-08 22:48:10,372 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c639c0500/58b0f733397f480996aa47947747e460/FLAG677ebc066 [2025-03-08 22:48:10,387 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c639c0500/58b0f733397f480996aa47947747e460 [2025-03-08 22:48:10,389 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 22:48:10,390 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 22:48:10,392 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 22:48:10,392 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 22:48:10,396 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 22:48:10,397 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 10:48:10" (1/1) ... [2025-03-08 22:48:10,397 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39e1dc5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:48:10, skipping insertion in model container [2025-03-08 22:48:10,397 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 10:48:10" (1/1) ... [2025-03-08 22:48:10,421 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 22:48:10,618 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 22:48:10,631 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2025-03-08 22:48:10,638 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 22:48:10,682 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 22:48:10,688 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 22:48:10,731 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 22:48:10,761 INFO L204 MainTranslator]: Completed translation [2025-03-08 22:48:10,762 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:48:10 WrapperNode [2025-03-08 22:48:10,763 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 22:48:10,764 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 22:48:10,764 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 22:48:10,764 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 22:48:10,769 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:48:10" (1/1) ... [2025-03-08 22:48:10,783 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:48:10" (1/1) ... [2025-03-08 22:48:10,799 INFO L138 Inliner]: procedures = 136, calls = 37, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 96 [2025-03-08 22:48:10,799 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 22:48:10,799 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 22:48:10,799 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 22:48:10,800 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 22:48:10,805 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:48:10" (1/1) ... [2025-03-08 22:48:10,805 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:48:10" (1/1) ... [2025-03-08 22:48:10,812 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:48:10" (1/1) ... [2025-03-08 22:48:10,831 INFO L175 MemorySlicer]: Split 16 memory accesses to 2 slices as follows [2, 14]. 88 percent of accesses are in the largest equivalence class. The 4 initializations are split as follows [2, 2]. The 7 writes are split as follows [0, 7]. [2025-03-08 22:48:10,833 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:48:10" (1/1) ... [2025-03-08 22:48:10,833 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:48:10" (1/1) ... [2025-03-08 22:48:10,843 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:48:10" (1/1) ... [2025-03-08 22:48:10,844 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:48:10" (1/1) ... [2025-03-08 22:48:10,847 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:48:10" (1/1) ... [2025-03-08 22:48:10,848 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:48:10" (1/1) ... [2025-03-08 22:48:10,850 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 22:48:10,854 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 22:48:10,855 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 22:48:10,855 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 22:48:10,855 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:48:10" (1/1) ... [2025-03-08 22:48:10,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 22:48:10,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:48:10,876 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-08 22:48:10,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-08 22:48:10,894 INFO L130 BoogieDeclarations]: Found specification of procedure list_add_tail [2025-03-08 22:48:10,894 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add_tail [2025-03-08 22:48:10,894 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-08 22:48:10,894 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 22:48:10,894 INFO L130 BoogieDeclarations]: Found specification of procedure create_sub_list [2025-03-08 22:48:10,894 INFO L138 BoogieDeclarations]: Found implementation of procedure create_sub_list [2025-03-08 22:48:10,894 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-08 22:48:10,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-03-08 22:48:10,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2025-03-08 22:48:10,894 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-03-08 22:48:10,894 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2025-03-08 22:48:10,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2025-03-08 22:48:10,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2025-03-08 22:48:10,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-08 22:48:10,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2025-03-08 22:48:10,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2025-03-08 22:48:10,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2025-03-08 22:48:10,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2025-03-08 22:48:10,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 22:48:10,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 22:48:10,980 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 22:48:10,981 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 22:48:11,246 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L601: call ULTIMATE.dealloc(main_~#top~1#1.base, main_~#top~1#1.offset);havoc main_~#top~1#1.base, main_~#top~1#1.offset; [2025-03-08 22:48:11,269 INFO L? ?]: Removed 85 outVars from TransFormulas that were not future-live. [2025-03-08 22:48:11,271 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 22:48:11,280 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 22:48:11,281 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 22:48:11,282 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 10:48:11 BoogieIcfgContainer [2025-03-08 22:48:11,282 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 22:48:11,284 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 22:48:11,285 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 22:48:11,288 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 22:48:11,289 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 10:48:10" (1/3) ... [2025-03-08 22:48:11,289 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1df82b47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 10:48:11, skipping insertion in model container [2025-03-08 22:48:11,289 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:48:10" (2/3) ... [2025-03-08 22:48:11,289 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1df82b47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 10:48:11, skipping insertion in model container [2025-03-08 22:48:11,289 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 10:48:11" (3/3) ... [2025-03-08 22:48:11,290 INFO L128 eAbstractionObserver]: Analyzing ICFG test-0102-2.i [2025-03-08 22:48:11,316 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 22:48:11,317 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG test-0102-2.i that has 3 procedures, 83 locations, 1 initial locations, 4 loop locations, and 31 error locations. [2025-03-08 22:48:11,347 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 22:48:11,355 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;@64305113, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 22:48:11,355 INFO L334 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2025-03-08 22:48:11,358 INFO L276 IsEmpty]: Start isEmpty. Operand has 83 states, 45 states have (on average 1.8666666666666667) internal successors, (84), 76 states have internal predecessors, (84), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-08 22:48:11,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2025-03-08 22:48:11,362 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:48:11,362 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2025-03-08 22:48:11,363 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 22:48:11,367 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:48:11,369 INFO L85 PathProgramCache]: Analyzing trace with hash 112575892, now seen corresponding path program 1 times [2025-03-08 22:48:11,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:48:11,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [128418854] [2025-03-08 22:48:11,379 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:11,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:48:11,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:48:11,381 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:48:11,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 22:48:11,448 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-08 22:48:11,457 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-08 22:48:11,457 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:11,457 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:11,459 INFO L256 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-03-08 22:48:11,461 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:48:11,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:48:11,473 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:48:11,473 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:48:11,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128418854] [2025-03-08 22:48:11,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128418854] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:48:11,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:48:11,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-08 22:48:11,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852634849] [2025-03-08 22:48:11,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:48:11,478 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-08 22:48:11,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:48:11,495 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-08 22:48:11,495 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-08 22:48:11,496 INFO L87 Difference]: Start difference. First operand has 83 states, 45 states have (on average 1.8666666666666667) internal successors, (84), 76 states have internal predecessors, (84), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 22:48:11,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:48:11,510 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2025-03-08 22:48:11,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-08 22:48:11,512 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2025-03-08 22:48:11,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:48:11,516 INFO L225 Difference]: With dead ends: 83 [2025-03-08 22:48:11,517 INFO L226 Difference]: Without dead ends: 81 [2025-03-08 22:48:11,518 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-08 22:48:11,521 INFO L435 NwaCegarLoop]: 88 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 22:48:11,523 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 22:48:11,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2025-03-08 22:48:11,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2025-03-08 22:48:11,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 44 states have (on average 1.7727272727272727) internal successors, (78), 74 states have internal predecessors, (78), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-08 22:48:11,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2025-03-08 22:48:11,549 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 5 [2025-03-08 22:48:11,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:48:11,550 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2025-03-08 22:48:11,550 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 22:48:11,550 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2025-03-08 22:48:11,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-03-08 22:48:11,550 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:48:11,550 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:48:11,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-08 22:48:11,755 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:48:11,755 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting create_sub_listErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 22:48:11,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:48:11,756 INFO L85 PathProgramCache]: Analyzing trace with hash 810586304, now seen corresponding path program 1 times [2025-03-08 22:48:11,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:48:11,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [352946229] [2025-03-08 22:48:11,758 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:11,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:48:11,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:48:11,763 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:48:11,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 22:48:11,822 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-08 22:48:11,831 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-08 22:48:11,831 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:11,831 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:11,832 INFO L256 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-08 22:48:11,833 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:48:11,861 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 [2025-03-08 22:48:11,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:48:11,918 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:48:11,918 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:48:11,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352946229] [2025-03-08 22:48:11,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352946229] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:48:11,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:48:11,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 22:48:11,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729992428] [2025-03-08 22:48:11,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:48:11,920 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 22:48:11,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:48:11,920 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 22:48:11,920 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 22:48:11,920 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 22:48:12,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:48:12,095 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2025-03-08 22:48:12,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 22:48:12,095 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2025-03-08 22:48:12,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:48:12,096 INFO L225 Difference]: With dead ends: 87 [2025-03-08 22:48:12,096 INFO L226 Difference]: Without dead ends: 87 [2025-03-08 22:48:12,096 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-08 22:48:12,097 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 7 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 22:48:12,097 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 237 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 22:48:12,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2025-03-08 22:48:12,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2025-03-08 22:48:12,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 47 states have (on average 1.7659574468085106) internal successors, (83), 76 states have internal predecessors, (83), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-08 22:48:12,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 91 transitions. [2025-03-08 22:48:12,102 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 91 transitions. Word has length 7 [2025-03-08 22:48:12,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:48:12,102 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 91 transitions. [2025-03-08 22:48:12,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 22:48:12,102 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 91 transitions. [2025-03-08 22:48:12,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-03-08 22:48:12,102 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:48:12,102 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:48:12,108 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-08 22:48:12,303 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:48:12,303 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting create_sub_listErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 22:48:12,303 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:48:12,303 INFO L85 PathProgramCache]: Analyzing trace with hash 810586303, now seen corresponding path program 1 times [2025-03-08 22:48:12,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:48:12,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1668949871] [2025-03-08 22:48:12,304 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:12,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:48:12,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:48:12,305 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:48:12,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 22:48:12,344 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-08 22:48:12,351 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-08 22:48:12,351 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:12,351 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:12,351 INFO L256 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-08 22:48:12,352 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:48:12,356 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 [2025-03-08 22:48:12,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:48:12,378 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:48:12,378 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:48:12,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668949871] [2025-03-08 22:48:12,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668949871] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:48:12,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:48:12,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 22:48:12,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133108229] [2025-03-08 22:48:12,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:48:12,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 22:48:12,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:48:12,379 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 22:48:12,379 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 22:48:12,379 INFO L87 Difference]: Start difference. First operand 84 states and 91 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 22:48:12,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:48:12,542 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2025-03-08 22:48:12,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 22:48:12,543 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2025-03-08 22:48:12,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:48:12,543 INFO L225 Difference]: With dead ends: 82 [2025-03-08 22:48:12,543 INFO L226 Difference]: Without dead ends: 82 [2025-03-08 22:48:12,543 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-08 22:48:12,544 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 23 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 22:48:12,544 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 180 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 22:48:12,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2025-03-08 22:48:12,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2025-03-08 22:48:12,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 47 states have (on average 1.6808510638297873) internal successors, (79), 74 states have internal predecessors, (79), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-08 22:48:12,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 87 transitions. [2025-03-08 22:48:12,548 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 87 transitions. Word has length 7 [2025-03-08 22:48:12,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:48:12,548 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 87 transitions. [2025-03-08 22:48:12,549 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 22:48:12,549 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 87 transitions. [2025-03-08 22:48:12,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-03-08 22:48:12,549 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:48:12,549 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:48:12,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-08 22:48:12,753 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:48:12,753 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 22:48:12,754 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:48:12,754 INFO L85 PathProgramCache]: Analyzing trace with hash -2147277671, now seen corresponding path program 1 times [2025-03-08 22:48:12,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:48:12,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [372833395] [2025-03-08 22:48:12,754 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:12,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:48:12,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:48:12,757 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:48:12,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-08 22:48:12,804 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-08 22:48:12,816 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-08 22:48:12,817 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:12,817 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:12,818 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-08 22:48:12,819 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:48:12,827 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 [2025-03-08 22:48:12,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:48:12,835 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:48:12,836 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:48:12,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372833395] [2025-03-08 22:48:12,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372833395] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:48:12,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:48:12,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-08 22:48:12,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765680876] [2025-03-08 22:48:12,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:48:12,836 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 22:48:12,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:48:12,836 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 22:48:12,836 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 22:48:12,836 INFO L87 Difference]: Start difference. First operand 82 states and 87 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 22:48:12,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:48:12,903 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2025-03-08 22:48:12,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 22:48:12,903 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2025-03-08 22:48:12,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:48:12,904 INFO L225 Difference]: With dead ends: 81 [2025-03-08 22:48:12,904 INFO L226 Difference]: Without dead ends: 81 [2025-03-08 22:48:12,904 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 22:48:12,905 INFO L435 NwaCegarLoop]: 80 mSDtfsCounter, 1 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 22:48:12,905 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 127 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 22:48:12,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2025-03-08 22:48:12,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2025-03-08 22:48:12,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 47 states have (on average 1.6595744680851063) internal successors, (78), 73 states have internal predecessors, (78), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-08 22:48:12,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2025-03-08 22:48:12,913 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 11 [2025-03-08 22:48:12,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:48:12,914 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2025-03-08 22:48:12,914 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 22:48:12,914 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2025-03-08 22:48:12,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-03-08 22:48:12,914 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:48:12,914 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:48:12,923 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-08 22:48:13,114 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:48:13,115 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 22:48:13,115 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:48:13,115 INFO L85 PathProgramCache]: Analyzing trace with hash -2147277670, now seen corresponding path program 1 times [2025-03-08 22:48:13,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:48:13,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1483844819] [2025-03-08 22:48:13,115 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:13,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:48:13,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:48:13,117 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:48:13,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-08 22:48:13,164 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-08 22:48:13,178 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-08 22:48:13,178 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:13,178 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:13,180 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-08 22:48:13,181 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:48:13,190 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 [2025-03-08 22:48:13,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:48:13,207 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:48:13,207 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:48:13,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483844819] [2025-03-08 22:48:13,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483844819] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:48:13,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:48:13,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-08 22:48:13,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387373928] [2025-03-08 22:48:13,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:48:13,207 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 22:48:13,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:48:13,208 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 22:48:13,208 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 22:48:13,208 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 22:48:13,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:48:13,281 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions. [2025-03-08 22:48:13,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 22:48:13,281 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2025-03-08 22:48:13,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:48:13,282 INFO L225 Difference]: With dead ends: 80 [2025-03-08 22:48:13,282 INFO L226 Difference]: Without dead ends: 80 [2025-03-08 22:48:13,282 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 22:48:13,282 INFO L435 NwaCegarLoop]: 80 mSDtfsCounter, 1 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 22:48:13,283 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 131 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 22:48:13,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2025-03-08 22:48:13,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2025-03-08 22:48:13,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 47 states have (on average 1.6382978723404256) internal successors, (77), 72 states have internal predecessors, (77), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-08 22:48:13,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2025-03-08 22:48:13,290 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 11 [2025-03-08 22:48:13,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:48:13,290 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2025-03-08 22:48:13,290 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 22:48:13,290 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2025-03-08 22:48:13,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-03-08 22:48:13,290 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:48:13,290 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:48:13,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-08 22:48:13,495 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:48:13,495 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting list_add_tailErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 22:48:13,495 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:48:13,495 INFO L85 PathProgramCache]: Analyzing trace with hash -306132288, now seen corresponding path program 1 times [2025-03-08 22:48:13,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:48:13,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1024390033] [2025-03-08 22:48:13,496 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:13,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:48:13,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:48:13,498 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:48:13,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-08 22:48:13,544 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-08 22:48:13,560 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-08 22:48:13,560 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:13,561 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:13,562 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-08 22:48:13,564 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:48:13,571 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 [2025-03-08 22:48:13,626 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2025-03-08 22:48:13,626 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 [2025-03-08 22:48:13,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:48:13,661 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:48:13,661 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:48:13,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024390033] [2025-03-08 22:48:13,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024390033] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:48:13,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:48:13,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-08 22:48:13,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160228095] [2025-03-08 22:48:13,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:48:13,662 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-08 22:48:13,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:48:13,662 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-08 22:48:13,662 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2025-03-08 22:48:13,662 INFO L87 Difference]: Start difference. First operand 80 states and 85 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 22:48:13,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:48:13,947 INFO L93 Difference]: Finished difference Result 99 states and 103 transitions. [2025-03-08 22:48:13,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 22:48:13,947 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2025-03-08 22:48:13,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:48:13,948 INFO L225 Difference]: With dead ends: 99 [2025-03-08 22:48:13,948 INFO L226 Difference]: Without dead ends: 99 [2025-03-08 22:48:13,948 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2025-03-08 22:48:13,948 INFO L435 NwaCegarLoop]: 59 mSDtfsCounter, 36 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 22:48:13,948 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 263 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 22:48:13,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2025-03-08 22:48:13,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 90. [2025-03-08 22:48:13,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 56 states have (on average 1.6964285714285714) internal successors, (95), 81 states have internal predecessors, (95), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-08 22:48:13,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 103 transitions. [2025-03-08 22:48:13,952 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 103 transitions. Word has length 14 [2025-03-08 22:48:13,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:48:13,953 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 103 transitions. [2025-03-08 22:48:13,953 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 22:48:13,953 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 103 transitions. [2025-03-08 22:48:13,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-03-08 22:48:13,953 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:48:13,953 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:48:13,960 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-08 22:48:14,153 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:48:14,154 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting list_add_tailErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 22:48:14,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:48:14,154 INFO L85 PathProgramCache]: Analyzing trace with hash -306132287, now seen corresponding path program 1 times [2025-03-08 22:48:14,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:48:14,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [786455399] [2025-03-08 22:48:14,155 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:14,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:48:14,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:48:14,156 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:48:14,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-08 22:48:14,200 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-08 22:48:14,217 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-08 22:48:14,217 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:14,217 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:14,219 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-08 22:48:14,221 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:48:14,229 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 [2025-03-08 22:48:14,236 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 [2025-03-08 22:48:14,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 22:48:14,317 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 [2025-03-08 22:48:14,324 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-03-08 22:48:14,325 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 [2025-03-08 22:48:14,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:48:14,375 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:48:14,375 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:48:14,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786455399] [2025-03-08 22:48:14,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786455399] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:48:14,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:48:14,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-08 22:48:14,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642646231] [2025-03-08 22:48:14,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:48:14,375 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-08 22:48:14,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:48:14,376 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-08 22:48:14,376 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2025-03-08 22:48:14,376 INFO L87 Difference]: Start difference. First operand 90 states and 103 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 22:48:14,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:48:14,728 INFO L93 Difference]: Finished difference Result 116 states and 129 transitions. [2025-03-08 22:48:14,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 22:48:14,728 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2025-03-08 22:48:14,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:48:14,729 INFO L225 Difference]: With dead ends: 116 [2025-03-08 22:48:14,729 INFO L226 Difference]: Without dead ends: 116 [2025-03-08 22:48:14,729 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2025-03-08 22:48:14,729 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 33 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 22:48:14,730 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 293 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 22:48:14,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2025-03-08 22:48:14,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 108. [2025-03-08 22:48:14,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 71 states have (on average 1.676056338028169) internal successors, (119), 97 states have internal predecessors, (119), 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) [2025-03-08 22:48:14,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 129 transitions. [2025-03-08 22:48:14,739 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 129 transitions. Word has length 14 [2025-03-08 22:48:14,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:48:14,739 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 129 transitions. [2025-03-08 22:48:14,739 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 22:48:14,739 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 129 transitions. [2025-03-08 22:48:14,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-03-08 22:48:14,740 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:48:14,740 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:48:14,746 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-08 22:48:14,940 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:48:14,940 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting list_add_tailErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 22:48:14,941 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:48:14,941 INFO L85 PathProgramCache]: Analyzing trace with hash -2135352579, now seen corresponding path program 1 times [2025-03-08 22:48:14,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:48:14,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2033471267] [2025-03-08 22:48:14,941 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:14,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:48:14,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:48:14,943 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:48:14,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-08 22:48:14,989 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-08 22:48:15,005 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-08 22:48:15,005 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:15,005 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:15,007 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-08 22:48:15,008 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:48:15,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:48:15,018 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:48:15,018 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:48:15,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033471267] [2025-03-08 22:48:15,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033471267] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:48:15,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:48:15,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 22:48:15,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448094107] [2025-03-08 22:48:15,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:48:15,019 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 22:48:15,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:48:15,020 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 22:48:15,020 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 22:48:15,020 INFO L87 Difference]: Start difference. First operand 108 states and 129 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 22:48:15,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:48:15,096 INFO L93 Difference]: Finished difference Result 107 states and 126 transitions. [2025-03-08 22:48:15,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 22:48:15,096 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2025-03-08 22:48:15,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:48:15,096 INFO L225 Difference]: With dead ends: 107 [2025-03-08 22:48:15,096 INFO L226 Difference]: Without dead ends: 107 [2025-03-08 22:48:15,097 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 22:48:15,097 INFO L435 NwaCegarLoop]: 76 mSDtfsCounter, 3 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 22:48:15,097 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 170 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 22:48:15,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2025-03-08 22:48:15,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2025-03-08 22:48:15,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 71 states have (on average 1.6338028169014085) internal successors, (116), 96 states have internal predecessors, (116), 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) [2025-03-08 22:48:15,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 126 transitions. [2025-03-08 22:48:15,101 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 126 transitions. Word has length 16 [2025-03-08 22:48:15,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:48:15,101 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 126 transitions. [2025-03-08 22:48:15,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 22:48:15,102 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 126 transitions. [2025-03-08 22:48:15,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-03-08 22:48:15,102 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:48:15,102 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:48:15,108 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-08 22:48:15,302 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:48:15,302 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting list_add_tailErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 22:48:15,303 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:48:15,303 INFO L85 PathProgramCache]: Analyzing trace with hash -2135352578, now seen corresponding path program 1 times [2025-03-08 22:48:15,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:48:15,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [335045641] [2025-03-08 22:48:15,303 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:15,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:48:15,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:48:15,305 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:48:15,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-08 22:48:15,350 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-08 22:48:15,368 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-08 22:48:15,368 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:15,368 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:15,370 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-08 22:48:15,372 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:48:15,375 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 [2025-03-08 22:48:15,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:48:15,505 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:48:15,505 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:48:15,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335045641] [2025-03-08 22:48:15,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335045641] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:48:15,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:48:15,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-03-08 22:48:15,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320174073] [2025-03-08 22:48:15,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:48:15,505 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-08 22:48:15,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:48:15,506 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-08 22:48:15,506 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2025-03-08 22:48:15,506 INFO L87 Difference]: Start difference. First operand 107 states and 126 transitions. Second operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 9 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 22:48:15,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:48:15,771 INFO L93 Difference]: Finished difference Result 114 states and 126 transitions. [2025-03-08 22:48:15,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-08 22:48:15,772 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.4) internal successors, (14), 9 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2025-03-08 22:48:15,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:48:15,773 INFO L225 Difference]: With dead ends: 114 [2025-03-08 22:48:15,773 INFO L226 Difference]: Without dead ends: 114 [2025-03-08 22:48:15,773 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2025-03-08 22:48:15,774 INFO L435 NwaCegarLoop]: 69 mSDtfsCounter, 30 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 22:48:15,774 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 538 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 22:48:15,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2025-03-08 22:48:15,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 107. [2025-03-08 22:48:15,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 71 states have (on average 1.619718309859155) internal successors, (115), 96 states have internal predecessors, (115), 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) [2025-03-08 22:48:15,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 125 transitions. [2025-03-08 22:48:15,777 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 125 transitions. Word has length 16 [2025-03-08 22:48:15,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:48:15,777 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 125 transitions. [2025-03-08 22:48:15,777 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.4) internal successors, (14), 9 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 22:48:15,777 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 125 transitions. [2025-03-08 22:48:15,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-03-08 22:48:15,778 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:48:15,778 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:48:15,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-08 22:48:15,982 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:48:15,982 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting list_add_tailErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 22:48:15,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:48:15,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1771420513, now seen corresponding path program 1 times [2025-03-08 22:48:15,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:48:15,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [51604458] [2025-03-08 22:48:15,983 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:15,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:48:15,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:48:15,985 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:48:15,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-08 22:48:16,042 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-08 22:48:16,060 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 22:48:16,060 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:16,060 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:16,062 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-08 22:48:16,063 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:48:16,069 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 [2025-03-08 22:48:16,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:48:16,098 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:48:16,098 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:48:16,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51604458] [2025-03-08 22:48:16,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51604458] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:48:16,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:48:16,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 22:48:16,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183843825] [2025-03-08 22:48:16,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:48:16,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 22:48:16,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:48:16,099 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 22:48:16,100 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-08 22:48:16,100 INFO L87 Difference]: Start difference. First operand 107 states and 125 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 22:48:16,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:48:16,267 INFO L93 Difference]: Finished difference Result 112 states and 120 transitions. [2025-03-08 22:48:16,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 22:48:16,267 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2025-03-08 22:48:16,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:48:16,268 INFO L225 Difference]: With dead ends: 112 [2025-03-08 22:48:16,268 INFO L226 Difference]: Without dead ends: 112 [2025-03-08 22:48:16,268 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-03-08 22:48:16,269 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 24 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 22:48:16,269 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 241 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 22:48:16,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2025-03-08 22:48:16,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 106. [2025-03-08 22:48:16,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 71 states have (on average 1.5492957746478873) internal successors, (110), 95 states have internal predecessors, (110), 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) [2025-03-08 22:48:16,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 120 transitions. [2025-03-08 22:48:16,276 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 120 transitions. Word has length 17 [2025-03-08 22:48:16,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:48:16,276 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 120 transitions. [2025-03-08 22:48:16,276 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 22:48:16,276 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 120 transitions. [2025-03-08 22:48:16,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-03-08 22:48:16,276 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:48:16,276 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:48:16,284 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-08 22:48:16,477 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:48:16,477 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting list_add_tailErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 22:48:16,477 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:48:16,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1771420512, now seen corresponding path program 1 times [2025-03-08 22:48:16,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:48:16,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1878643529] [2025-03-08 22:48:16,478 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:16,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:48:16,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:48:16,480 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:48:16,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-08 22:48:16,532 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-08 22:48:16,551 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 22:48:16,551 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:16,551 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:16,555 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-08 22:48:16,556 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:48:16,561 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 [2025-03-08 22:48:16,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:48:16,622 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:48:16,622 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:48:16,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878643529] [2025-03-08 22:48:16,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878643529] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:48:16,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:48:16,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 22:48:16,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618964246] [2025-03-08 22:48:16,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:48:16,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 22:48:16,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:48:16,623 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 22:48:16,623 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-08 22:48:16,624 INFO L87 Difference]: Start difference. First operand 106 states and 120 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 22:48:16,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:48:16,807 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2025-03-08 22:48:16,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 22:48:16,807 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2025-03-08 22:48:16,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:48:16,808 INFO L225 Difference]: With dead ends: 110 [2025-03-08 22:48:16,808 INFO L226 Difference]: Without dead ends: 110 [2025-03-08 22:48:16,808 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-03-08 22:48:16,809 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 19 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 22:48:16,809 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 256 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 22:48:16,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2025-03-08 22:48:16,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 106. [2025-03-08 22:48:16,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 71 states have (on average 1.4929577464788732) internal successors, (106), 95 states have internal predecessors, (106), 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) [2025-03-08 22:48:16,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 116 transitions. [2025-03-08 22:48:16,812 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 116 transitions. Word has length 17 [2025-03-08 22:48:16,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:48:16,812 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 116 transitions. [2025-03-08 22:48:16,812 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 22:48:16,812 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 116 transitions. [2025-03-08 22:48:16,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-03-08 22:48:16,812 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:48:16,812 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:48:16,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-08 22:48:17,017 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:48:17,017 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting list_add_tailErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 22:48:17,017 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:48:17,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1528064004, now seen corresponding path program 1 times [2025-03-08 22:48:17,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:48:17,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [57138825] [2025-03-08 22:48:17,018 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:17,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:48:17,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:48:17,020 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:48:17,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-08 22:48:17,085 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-08 22:48:17,111 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 22:48:17,111 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:17,111 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:17,114 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 39 conjuncts are in the unsatisfiable core [2025-03-08 22:48:17,118 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:48:17,123 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 [2025-03-08 22:48:17,127 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 [2025-03-08 22:48:17,186 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 [2025-03-08 22:48:17,208 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 [2025-03-08 22:48:17,211 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 19 treesize of output 18 [2025-03-08 22:48:17,249 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-03-08 22:48:17,249 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 [2025-03-08 22:48:17,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2025-03-08 22:48:17,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 22 treesize of output 10 [2025-03-08 22:48:17,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:48:17,393 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:48:17,393 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:48:17,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57138825] [2025-03-08 22:48:17,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57138825] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:48:17,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:48:17,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2025-03-08 22:48:17,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630102136] [2025-03-08 22:48:17,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:48:17,393 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-08 22:48:17,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:48:17,394 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-08 22:48:17,394 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2025-03-08 22:48:17,394 INFO L87 Difference]: Start difference. First operand 106 states and 116 transitions. Second operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 22:48:18,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:48:18,000 INFO L93 Difference]: Finished difference Result 117 states and 129 transitions. [2025-03-08 22:48:18,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-08 22:48:18,001 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2025-03-08 22:48:18,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:48:18,002 INFO L225 Difference]: With dead ends: 117 [2025-03-08 22:48:18,002 INFO L226 Difference]: Without dead ends: 117 [2025-03-08 22:48:18,003 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2025-03-08 22:48:18,003 INFO L435 NwaCegarLoop]: 64 mSDtfsCounter, 26 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-08 22:48:18,003 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 448 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-08 22:48:18,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2025-03-08 22:48:18,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2025-03-08 22:48:18,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 81 states have (on average 1.4444444444444444) internal successors, (117), 105 states have internal predecessors, (117), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-08 22:48:18,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 129 transitions. [2025-03-08 22:48:18,006 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 129 transitions. Word has length 19 [2025-03-08 22:48:18,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:48:18,006 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 129 transitions. [2025-03-08 22:48:18,006 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 22:48:18,006 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 129 transitions. [2025-03-08 22:48:18,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-03-08 22:48:18,007 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:48:18,007 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:48:18,016 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-08 22:48:18,207 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:48:18,207 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting list_add_tailErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 22:48:18,208 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:48:18,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1528064003, now seen corresponding path program 1 times [2025-03-08 22:48:18,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:48:18,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1077322474] [2025-03-08 22:48:18,208 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:18,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:48:18,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:48:18,210 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:48:18,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-08 22:48:18,267 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-08 22:48:18,292 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 22:48:18,293 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:18,293 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:18,296 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 49 conjuncts are in the unsatisfiable core [2025-03-08 22:48:18,298 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:48:18,304 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 [2025-03-08 22:48:18,308 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 [2025-03-08 22:48:18,366 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 [2025-03-08 22:48:18,373 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 [2025-03-08 22:48:18,424 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 19 treesize of output 18 [2025-03-08 22:48:18,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2025-03-08 22:48:18,482 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-03-08 22:48:18,483 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 [2025-03-08 22:48:18,491 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 [2025-03-08 22:48:18,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-08 22:48:18,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2025-03-08 22:48:18,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 22 treesize of output 10 [2025-03-08 22:48:18,677 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 [2025-03-08 22:48:18,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:48:18,733 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:48:18,733 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:48:18,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077322474] [2025-03-08 22:48:18,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077322474] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:48:18,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:48:18,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2025-03-08 22:48:18,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563128994] [2025-03-08 22:48:18,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:48:18,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-08 22:48:18,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:48:18,733 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-08 22:48:18,733 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2025-03-08 22:48:18,734 INFO L87 Difference]: Start difference. First operand 117 states and 129 transitions. Second operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 22:48:19,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:48:19,458 INFO L93 Difference]: Finished difference Result 117 states and 128 transitions. [2025-03-08 22:48:19,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-08 22:48:19,459 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2025-03-08 22:48:19,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:48:19,459 INFO L225 Difference]: With dead ends: 117 [2025-03-08 22:48:19,459 INFO L226 Difference]: Without dead ends: 117 [2025-03-08 22:48:19,460 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2025-03-08 22:48:19,460 INFO L435 NwaCegarLoop]: 65 mSDtfsCounter, 25 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-08 22:48:19,460 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 414 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-08 22:48:19,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2025-03-08 22:48:19,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2025-03-08 22:48:19,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 81 states have (on average 1.4320987654320987) internal successors, (116), 105 states have internal predecessors, (116), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-08 22:48:19,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 128 transitions. [2025-03-08 22:48:19,463 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 128 transitions. Word has length 19 [2025-03-08 22:48:19,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:48:19,463 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 128 transitions. [2025-03-08 22:48:19,463 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 22:48:19,463 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 128 transitions. [2025-03-08 22:48:19,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-03-08 22:48:19,464 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:48:19,464 INFO L218 NwaCegarLoop]: trace histogram [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] [2025-03-08 22:48:19,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-08 22:48:19,665 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:48:19,665 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting create_sub_listErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 22:48:19,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:48:19,665 INFO L85 PathProgramCache]: Analyzing trace with hash -2048594143, now seen corresponding path program 1 times [2025-03-08 22:48:19,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:48:19,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [91627653] [2025-03-08 22:48:19,666 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:19,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:48:19,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:48:19,667 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:48:19,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-08 22:48:19,730 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-08 22:48:19,759 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-08 22:48:19,759 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:19,759 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:19,762 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-03-08 22:48:19,765 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:48:19,771 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 [2025-03-08 22:48:19,775 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 [2025-03-08 22:48:19,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-03-08 22:48:20,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 22:48:20,038 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 [2025-03-08 22:48:20,050 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-03-08 22:48:20,050 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 [2025-03-08 22:48:20,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:48:20,118 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 22:48:20,588 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:48:20,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91627653] [2025-03-08 22:48:20,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91627653] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 22:48:20,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1138806608] [2025-03-08 22:48:20,589 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:20,589 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2025-03-08 22:48:20,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2025-03-08 22:48:20,591 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2025-03-08 22:48:20,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2025-03-08 22:48:20,688 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-08 22:48:20,822 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-08 22:48:20,822 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:20,822 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:20,836 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 35 conjuncts are in the unsatisfiable core [2025-03-08 22:48:20,839 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:48:20,843 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 [2025-03-08 22:48:20,846 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 [2025-03-08 22:48:20,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-03-08 22:48:21,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 22:48:21,007 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 [2025-03-08 22:48:21,020 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-03-08 22:48:21,020 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 [2025-03-08 22:48:21,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:48:21,034 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 22:48:21,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1138806608] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 22:48:21,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 22:48:21,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2025-03-08 22:48:21,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885083236] [2025-03-08 22:48:21,283 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 22:48:21,283 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-08 22:48:21,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:48:21,284 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-08 22:48:21,284 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2025-03-08 22:48:21,284 INFO L87 Difference]: Start difference. First operand 117 states and 128 transitions. Second operand has 13 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 22:48:21,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:48:21,942 INFO L93 Difference]: Finished difference Result 136 states and 152 transitions. [2025-03-08 22:48:21,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-08 22:48:21,943 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2025-03-08 22:48:21,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:48:21,943 INFO L225 Difference]: With dead ends: 136 [2025-03-08 22:48:21,943 INFO L226 Difference]: Without dead ends: 136 [2025-03-08 22:48:21,944 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2025-03-08 22:48:21,944 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 34 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-08 22:48:21,944 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 424 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-08 22:48:21,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2025-03-08 22:48:21,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 125. [2025-03-08 22:48:21,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 87 states have (on average 1.4137931034482758) internal successors, (123), 110 states have internal predecessors, (123), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2025-03-08 22:48:21,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 138 transitions. [2025-03-08 22:48:21,948 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 138 transitions. Word has length 29 [2025-03-08 22:48:21,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:48:21,948 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 138 transitions. [2025-03-08 22:48:21,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 22:48:21,948 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 138 transitions. [2025-03-08 22:48:21,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-03-08 22:48:21,948 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:48:21,948 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:48:21,953 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2025-03-08 22:48:22,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-08 22:48:22,349 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:48:22,349 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting list_add_tailErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 22:48:22,349 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:48:22,349 INFO L85 PathProgramCache]: Analyzing trace with hash -136124771, now seen corresponding path program 1 times [2025-03-08 22:48:22,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:48:22,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [897614043] [2025-03-08 22:48:22,350 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:22,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:48:22,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:48:22,351 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:48:22,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-08 22:48:22,424 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-08 22:48:22,477 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-08 22:48:22,477 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:22,477 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:22,482 INFO L256 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 86 conjuncts are in the unsatisfiable core [2025-03-08 22:48:22,490 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:48:22,496 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 [2025-03-08 22:48:22,499 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 [2025-03-08 22:48:22,549 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 [2025-03-08 22:48:22,554 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 [2025-03-08 22:48:22,589 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 19 treesize of output 18 [2025-03-08 22:48:22,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2025-03-08 22:48:22,604 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 [2025-03-08 22:48:22,650 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2025-03-08 22:48:22,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2025-03-08 22:48:22,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2025-03-08 22:48:22,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-08 22:48:22,758 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 15 treesize of output 7 [2025-03-08 22:48:22,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2025-03-08 22:48:23,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 42 [2025-03-08 22:48:23,451 INFO L349 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2025-03-08 22:48:23,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 87 treesize of output 97 [2025-03-08 22:48:23,463 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 0 case distinctions, treesize of input 45 treesize of output 18 [2025-03-08 22:48:23,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 33 treesize of output 22 [2025-03-08 22:48:23,473 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 [2025-03-08 22:48:23,604 INFO L349 Elim1Store]: treesize reduction 156, result has 25.4 percent of original size [2025-03-08 22:48:23,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 46 treesize of output 76 [2025-03-08 22:48:23,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 27 [2025-03-08 22:48:23,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 35 treesize of output 19 [2025-03-08 22:48:28,437 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:48:28,438 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 22:48:29,267 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:48:29,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897614043] [2025-03-08 22:48:29,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897614043] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 22:48:29,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1534004735] [2025-03-08 22:48:29,268 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:29,268 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2025-03-08 22:48:29,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2025-03-08 22:48:29,269 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2025-03-08 22:48:29,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2025-03-08 22:48:29,366 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-08 22:48:29,572 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-08 22:48:29,573 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:29,573 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:29,578 INFO L256 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 75 conjuncts are in the unsatisfiable core [2025-03-08 22:48:29,582 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:48:29,585 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 [2025-03-08 22:48:29,726 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 [2025-03-08 22:48:29,731 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 [2025-03-08 22:48:29,800 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 19 treesize of output 18 [2025-03-08 22:48:29,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2025-03-08 22:48:29,833 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2025-03-08 22:48:29,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2025-03-08 22:48:29,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2025-03-08 22:48:29,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-08 22:48:29,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2025-03-08 22:48:29,902 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 15 treesize of output 7 [2025-03-08 22:48:30,250 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 [2025-03-08 22:48:30,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 42 [2025-03-08 22:48:30,282 INFO L349 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2025-03-08 22:48:30,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 87 treesize of output 97 [2025-03-08 22:48:30,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 77 treesize of output 56 [2025-03-08 22:48:30,293 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 0 case distinctions, treesize of input 55 treesize of output 20 [2025-03-08 22:48:30,397 INFO L349 Elim1Store]: treesize reduction 156, result has 25.4 percent of original size [2025-03-08 22:48:30,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 46 treesize of output 76 [2025-03-08 22:48:30,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 27 [2025-03-08 22:48:30,749 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 27 treesize of output 15 [2025-03-08 22:48:30,951 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:48:30,952 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 22:48:34,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1534004735] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 22:48:34,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 22:48:34,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 31 [2025-03-08 22:48:34,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716026681] [2025-03-08 22:48:34,213 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 22:48:34,213 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-08 22:48:34,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:48:34,214 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-08 22:48:34,215 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=2047, Unknown=41, NotChecked=0, Total=2256 [2025-03-08 22:48:34,215 INFO L87 Difference]: Start difference. First operand 125 states and 138 transitions. Second operand has 32 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 27 states have internal predecessors, (44), 5 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:40,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-08 22:48:42,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:48:42,254 INFO L93 Difference]: Finished difference Result 140 states and 153 transitions. [2025-03-08 22:48:42,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-08 22:48:42,254 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 27 states have internal predecessors, (44), 5 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2025-03-08 22:48:42,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:48:42,255 INFO L225 Difference]: With dead ends: 140 [2025-03-08 22:48:42,255 INFO L226 Difference]: Without dead ends: 140 [2025-03-08 22:48:42,256 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 900 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=359, Invalid=3630, Unknown=43, NotChecked=0, Total=4032 [2025-03-08 22:48:42,256 INFO L435 NwaCegarLoop]: 65 mSDtfsCounter, 72 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 951 mSolverCounterSat, 30 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 951 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2025-03-08 22:48:42,256 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 765 Invalid, 982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 951 Invalid, 1 Unknown, 0 Unchecked, 6.1s Time] [2025-03-08 22:48:42,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2025-03-08 22:48:42,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2025-03-08 22:48:42,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 99 states have (on average 1.3737373737373737) internal successors, (136), 123 states have internal predecessors, (136), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2025-03-08 22:48:42,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 153 transitions. [2025-03-08 22:48:42,260 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 153 transitions. Word has length 35 [2025-03-08 22:48:42,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:48:42,260 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 153 transitions. [2025-03-08 22:48:42,260 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 27 states have internal predecessors, (44), 5 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:42,260 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 153 transitions. [2025-03-08 22:48:42,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-03-08 22:48:42,260 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:48:42,261 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:48:42,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-08 22:48:42,466 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2025-03-08 22:48:42,661 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2025-03-08 22:48:42,662 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting list_add_tailErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 22:48:42,662 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:48:42,662 INFO L85 PathProgramCache]: Analyzing trace with hash -136124770, now seen corresponding path program 1 times [2025-03-08 22:48:42,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:48:42,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [235094465] [2025-03-08 22:48:42,662 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:42,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:48:42,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:48:42,664 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:48:42,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-08 22:48:42,745 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-08 22:48:42,788 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-08 22:48:42,788 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:42,788 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:42,793 INFO L256 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 100 conjuncts are in the unsatisfiable core [2025-03-08 22:48:42,797 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:48:42,801 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 [2025-03-08 22:48:42,806 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 [2025-03-08 22:48:42,851 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 [2025-03-08 22:48:42,857 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 [2025-03-08 22:48:42,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2025-03-08 22:48:42,890 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 19 treesize of output 18 [2025-03-08 22:48:42,938 INFO L349 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2025-03-08 22:48:42,938 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 [2025-03-08 22:48:42,960 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-03-08 22:48:42,960 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 [2025-03-08 22:48:43,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 22:48:43,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2025-03-08 22:48:43,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 22:48:43,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-08 22:48:43,093 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 [2025-03-08 22:48:43,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2025-03-08 22:48:44,364 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 0 case distinctions, treesize of input 57 treesize of output 44 [2025-03-08 22:48:44,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 22:48:44,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 22:48:44,375 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 31 [2025-03-08 22:48:44,380 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 0 case distinctions, treesize of input 84 treesize of output 54 [2025-03-08 22:48:44,417 INFO L349 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2025-03-08 22:48:44,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 88 treesize of output 98 [2025-03-08 22:48:44,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 98 treesize of output 84 [2025-03-08 22:48:44,471 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 18 treesize of output 11 [2025-03-08 22:48:44,740 INFO L349 Elim1Store]: treesize reduction 92, result has 42.9 percent of original size [2025-03-08 22:48:44,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 33 treesize of output 81 [2025-03-08 22:48:44,846 INFO L349 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2025-03-08 22:48:44,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 26 [2025-03-08 22:48:45,135 INFO L349 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2025-03-08 22:48:45,135 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 99 treesize of output 78 [2025-03-08 22:48:45,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-08 22:48:45,467 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 [2025-03-08 22:48:45,471 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 [2025-03-08 22:48:45,684 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:48:45,684 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 22:48:46,236 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd (_ bv4 32) |c_create_sub_list_insert_sub_~head#1.offset|))) (and (forall ((v_ArrVal_866 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_867 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$#1.offset| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_867) |c_create_sub_list_insert_sub_~head#1.base|) .cse0) (_ bv4 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#1.base| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_866) |c_create_sub_list_insert_sub_~head#1.base|) .cse0)))) (forall ((v_ArrVal_867 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$#1.offset| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_867) |c_create_sub_list_insert_sub_~head#1.base|) .cse0))) (bvule .cse1 (bvadd .cse1 (_ bv4 32))))))) is different from false [2025-03-08 22:48:46,292 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd (_ bv4 32) |c_create_sub_list_~sub#1.offset|))) (and (forall ((|v_create_sub_list_insert_sub_~sub~0#1.base_31| (_ BitVec 32))) (or (forall ((v_ArrVal_865 (_ BitVec 32)) (v_ArrVal_866 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_867 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$#1.offset| |v_create_sub_list_insert_sub_~sub~0#1.base_31| v_ArrVal_867) |c_create_sub_list_~sub#1.base|) .cse0)) (select (store |c_#length| |v_create_sub_list_insert_sub_~sub~0#1.base_31| v_ArrVal_865) (select (select (store |c_#memory_$Pointer$#1.base| |v_create_sub_list_insert_sub_~sub~0#1.base_31| v_ArrVal_866) |c_create_sub_list_~sub#1.base|) .cse0)))) (not (= (_ bv0 1) (select |c_#valid| |v_create_sub_list_insert_sub_~sub~0#1.base_31|))))) (forall ((|v_create_sub_list_insert_sub_~sub~0#1.base_31| (_ BitVec 32))) (or (forall ((v_ArrVal_867 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$#1.offset| |v_create_sub_list_insert_sub_~sub~0#1.base_31| v_ArrVal_867) |c_create_sub_list_~sub#1.base|) .cse0))) (bvule .cse1 (bvadd (_ bv4 32) .cse1)))) (not (= (_ bv0 1) (select |c_#valid| |v_create_sub_list_insert_sub_~sub~0#1.base_31|))))))) is different from false [2025-03-08 22:48:49,819 INFO L349 Elim1Store]: treesize reduction 10, result has 83.6 percent of original size [2025-03-08 22:48:49,819 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 303 treesize of output 345 [2025-03-08 22:48:51,677 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse8 (select |c_#memory_$Pointer$#1.base| |c_create_sub_list_insert_sub_~head#1.base|)) (.cse10 (select |c_#memory_$Pointer$#1.offset| |c_create_sub_list_insert_sub_~head#1.base|)) (.cse9 (bvadd (_ bv4 32) |c_create_sub_list_insert_sub_~head#1.offset|))) (let ((.cse4 (store |c_#memory_$Pointer$#1.offset| |c_create_sub_list_insert_sub_~head#1.base| (store .cse10 .cse9 (bvadd (_ bv4 32) |c_create_sub_list_insert_sub_~sub~0#1.offset|)))) (.cse2 (select .cse8 .cse9)) (.cse3 (select .cse10 .cse9)) (.cse5 (bvadd (_ bv4 32) |c_create_sub_list_~sub#1.offset|))) (and (forall ((v_prenex_5 (Array (_ BitVec 32) (_ BitVec 32))) (v_prenex_6 (_ BitVec 32)) (v_prenex_7 (_ BitVec 32)) (v_prenex_8 (Array (_ BitVec 32) (_ BitVec 32)))) (or (let ((.cse0 (select (select (store (let ((.cse1 (store .cse4 |c_create_sub_list_insert_sub_~sub~0#1.base| v_prenex_5))) (store .cse1 .cse2 (store (select .cse1 .cse2) .cse3 v_prenex_6))) v_prenex_7 v_prenex_8) |c_create_sub_list_~sub#1.base|) .cse5))) (bvule .cse0 (bvadd (_ bv4 32) .cse0))) (= v_prenex_7 |c_create_sub_list_insert_sub_~head#1.base|) (= v_prenex_7 |c_create_sub_list_insert_sub_~sub~0#1.base|))) (forall ((v_ArrVal_883 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_884 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_865 (_ BitVec 32)) (v_ArrVal_886 (_ BitVec 32)) (v_ArrVal_885 (_ BitVec 32)) (|v_create_sub_list_insert_sub_~sub~0#1.base_31| (_ BitVec 32)) (v_ArrVal_866 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_867 (Array (_ BitVec 32) (_ BitVec 32)))) (or (= |v_create_sub_list_insert_sub_~sub~0#1.base_31| |c_create_sub_list_insert_sub_~sub~0#1.base|) (bvule (bvadd (_ bv4 32) (select (select (store (let ((.cse6 (store .cse4 |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_884))) (store .cse6 .cse2 (store (select .cse6 .cse2) .cse3 v_ArrVal_885))) |v_create_sub_list_insert_sub_~sub~0#1.base_31| v_ArrVal_867) |c_create_sub_list_~sub#1.base|) .cse5)) (select (store |c_#length| |v_create_sub_list_insert_sub_~sub~0#1.base_31| v_ArrVal_865) (select (select (store (let ((.cse7 (store (store |c_#memory_$Pointer$#1.base| |c_create_sub_list_insert_sub_~head#1.base| (store .cse8 .cse9 |c_create_sub_list_insert_sub_~sub~0#1.base|)) |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_883))) (store .cse7 .cse2 (store (select .cse7 .cse2) .cse3 v_ArrVal_886))) |v_create_sub_list_insert_sub_~sub~0#1.base_31| v_ArrVal_866) |c_create_sub_list_~sub#1.base|) .cse5))) (= |c_create_sub_list_insert_sub_~head#1.base| |v_create_sub_list_insert_sub_~sub~0#1.base_31|)))))) is different from false [2025-03-08 22:48:51,723 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:48:51,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235094465] [2025-03-08 22:48:51,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235094465] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 22:48:51,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1024105234] [2025-03-08 22:48:51,723 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:51,723 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2025-03-08 22:48:51,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2025-03-08 22:48:51,725 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2025-03-08 22:48:51,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2025-03-08 22:48:51,839 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-08 22:48:52,188 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-08 22:48:52,188 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:52,188 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:52,195 INFO L256 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 95 conjuncts are in the unsatisfiable core [2025-03-08 22:48:52,199 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:48:52,209 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 [2025-03-08 22:48:52,770 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 [2025-03-08 22:48:52,787 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 [2025-03-08 22:48:53,002 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 19 treesize of output 18 [2025-03-08 22:48:53,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2025-03-08 22:48:53,346 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2025-03-08 22:48:53,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2025-03-08 22:48:53,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2025-03-08 22:48:53,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2025-03-08 22:48:53,814 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 16 treesize of output 11 [2025-03-08 22:48:53,885 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 15 treesize of output 7 [2025-03-08 22:48:53,895 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2025-03-08 22:48:58,747 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 44 [2025-03-08 22:48:58,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 22:48:58,762 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 31 [2025-03-08 22:48:58,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 61 [2025-03-08 22:48:58,782 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 18 treesize of output 11 [2025-03-08 22:48:58,854 INFO L349 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2025-03-08 22:48:58,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 96 treesize of output 104 [2025-03-08 22:48:58,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 84 treesize of output 61 [2025-03-08 22:48:58,898 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 0 case distinctions, treesize of input 55 treesize of output 26 [2025-03-08 22:48:59,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 22:48:59,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 22:48:59,421 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2025-03-08 22:48:59,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 21 [2025-03-08 22:48:59,558 INFO L349 Elim1Store]: treesize reduction 72, result has 22.6 percent of original size [2025-03-08 22:48:59,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 38 treesize of output 44 [2025-03-08 22:49:00,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2025-03-08 22:49:00,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-08 22:49:01,109 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 25 treesize of output 13 [2025-03-08 22:49:01,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2025-03-08 22:49:01,713 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:49:01,713 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 22:49:01,855 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd (_ bv4 32) |c_create_sub_list_insert_sub_~head#1.offset|))) (and (forall ((v_ArrVal_1002 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1003 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$#1.offset| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_1003) |c_create_sub_list_insert_sub_~head#1.base|) .cse0) (_ bv4 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#1.base| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_1002) |c_create_sub_list_insert_sub_~head#1.base|) .cse0)))) (forall ((v_ArrVal_1003 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$#1.offset| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_1003) |c_create_sub_list_insert_sub_~head#1.base|) .cse0))) (bvule .cse1 (bvadd .cse1 (_ bv4 32))))))) is different from false [2025-03-08 22:49:07,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1024105234] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 22:49:07,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 22:49:07,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 43 [2025-03-08 22:49:07,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686888406] [2025-03-08 22:49:07,685 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 22:49:07,685 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2025-03-08 22:49:07,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:49:07,686 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2025-03-08 22:49:07,686 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=2386, Unknown=11, NotChecked=404, Total=2970 [2025-03-08 22:49:07,686 INFO L87 Difference]: Start difference. First operand 139 states and 153 transitions. Second operand has 44 states, 41 states have (on average 1.4634146341463414) internal successors, (60), 38 states have internal predecessors, (60), 6 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 22:49:30,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:49:30,374 INFO L93 Difference]: Finished difference Result 142 states and 154 transitions. [2025-03-08 22:49:30,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-08 22:49:30,375 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 41 states have (on average 1.4634146341463414) internal successors, (60), 38 states have internal predecessors, (60), 6 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2025-03-08 22:49:30,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:49:30,375 INFO L225 Difference]: With dead ends: 142 [2025-03-08 22:49:30,375 INFO L226 Difference]: Without dead ends: 142 [2025-03-08 22:49:30,376 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1252 ImplicationChecksByTransitivity, 23.2s TimeCoverageRelationStatistics Valid=369, Invalid=4744, Unknown=15, NotChecked=572, Total=5700 [2025-03-08 22:49:30,377 INFO L435 NwaCegarLoop]: 66 mSDtfsCounter, 50 mSDsluCounter, 1050 mSDsCounter, 0 mSdLazyCounter, 1579 mSolverCounterSat, 28 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1116 SdHoareTripleChecker+Invalid, 1613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1579 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.0s IncrementalHoareTripleChecker+Time [2025-03-08 22:49:30,377 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 1116 Invalid, 1613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1579 Invalid, 6 Unknown, 0 Unchecked, 13.0s Time] [2025-03-08 22:49:30,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2025-03-08 22:49:30,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2025-03-08 22:49:30,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 101 states have (on average 1.3564356435643565) internal successors, (137), 126 states have internal predecessors, (137), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2025-03-08 22:49:30,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 154 transitions. [2025-03-08 22:49:30,381 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 154 transitions. Word has length 35 [2025-03-08 22:49:30,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:49:30,381 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 154 transitions. [2025-03-08 22:49:30,381 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 41 states have (on average 1.4634146341463414) internal successors, (60), 38 states have internal predecessors, (60), 6 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 22:49:30,381 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 154 transitions. [2025-03-08 22:49:30,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-03-08 22:49:30,381 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:49:30,382 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 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] [2025-03-08 22:49:30,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2025-03-08 22:49:30,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-08 22:49:30,784 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:49:30,784 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting list_add_tailErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 22:49:30,784 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:49:30,784 INFO L85 PathProgramCache]: Analyzing trace with hash -193417920, now seen corresponding path program 1 times [2025-03-08 22:49:30,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:49:30,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1254957097] [2025-03-08 22:49:30,785 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:49:30,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:49:30,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:49:30,786 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:49:30,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-08 22:49:30,872 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-08 22:49:30,905 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-08 22:49:30,905 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:49:30,905 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:49:30,909 INFO L256 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-08 22:49:30,911 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:49:31,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 22:49:31,400 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 [2025-03-08 22:49:31,428 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-03-08 22:49:31,428 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 [2025-03-08 22:49:31,657 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:49:31,657 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 22:49:36,731 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 52 treesize of output 48 [2025-03-08 22:49:37,227 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2025-03-08 22:49:37,227 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 16 treesize of output 15 [2025-03-08 22:49:37,316 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2025-03-08 22:49:37,316 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 16 treesize of output 15 [2025-03-08 22:49:37,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:49:37,367 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:49:37,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254957097] [2025-03-08 22:49:37,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254957097] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 22:49:37,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 22:49:37,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2025-03-08 22:49:37,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204776729] [2025-03-08 22:49:37,367 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 22:49:37,367 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-08 22:49:37,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:49:37,367 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-08 22:49:37,368 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=448, Unknown=1, NotChecked=0, Total=506 [2025-03-08 22:49:37,368 INFO L87 Difference]: Start difference. First operand 142 states and 154 transitions. Second operand has 23 states, 20 states have (on average 2.0) internal successors, (40), 17 states have internal predecessors, (40), 7 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-08 22:49:42,316 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-08 22:49:46,318 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1]