./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/memleaks_test19-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 551b0097 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ldv-memsafety/memleaks_test19-2.i -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1df2ca055a97db0a00e0c4b03f212c5ac3c2765d37b628ab5708f179a281754f --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-09 22:27:43,276 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-09 22:27:43,337 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-01-09 22:27:43,342 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-09 22:27:43,342 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-09 22:27:43,370 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-09 22:27:43,371 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-09 22:27:43,371 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-09 22:27:43,372 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-09 22:27:43,372 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-09 22:27:43,372 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-09 22:27:43,373 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-09 22:27:43,373 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-09 22:27:43,373 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-09 22:27:43,374 INFO L153 SettingsManager]: * Use SBE=true [2025-01-09 22:27:43,374 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-09 22:27:43,374 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-09 22:27:43,374 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-09 22:27:43,374 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-09 22:27:43,374 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-09 22:27:43,375 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-01-09 22:27:43,375 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-01-09 22:27:43,375 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-01-09 22:27:43,375 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-09 22:27:43,375 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-01-09 22:27:43,375 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-01-09 22:27:43,375 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-09 22:27:43,375 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-09 22:27:43,375 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-09 22:27:43,375 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-09 22:27:43,376 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 22:27:43,376 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 22:27:43,376 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 22:27:43,376 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 22:27:43,377 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-09 22:27:43,377 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 22:27:43,377 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 22:27:43,377 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 22:27:43,377 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 22:27:43,377 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-09 22:27:43,377 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-09 22:27:43,377 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-09 22:27:43,377 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-09 22:27:43,377 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-09 22:27:43,378 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-09 22:27:43,378 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-09 22:27:43,378 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-09 22:27:43,378 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1df2ca055a97db0a00e0c4b03f212c5ac3c2765d37b628ab5708f179a281754f [2025-01-09 22:27:43,639 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-09 22:27:43,646 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-09 22:27:43,649 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-09 22:27:43,651 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-09 22:27:43,652 INFO L274 PluginConnector]: CDTParser initialized [2025-01-09 22:27:43,654 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test19-2.i [2025-01-09 22:27:44,936 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/416587bc1/7593f68513624eb1bd9a396f38f48315/FLAG40c22d3da [2025-01-09 22:27:45,249 INFO L384 CDTParser]: Found 1 translation units. [2025-01-09 22:27:45,250 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test19-2.i [2025-01-09 22:27:45,270 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/416587bc1/7593f68513624eb1bd9a396f38f48315/FLAG40c22d3da [2025-01-09 22:27:45,286 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/416587bc1/7593f68513624eb1bd9a396f38f48315 [2025-01-09 22:27:45,289 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-09 22:27:45,291 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-09 22:27:45,292 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-09 22:27:45,292 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-09 22:27:45,296 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-09 22:27:45,297 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 10:27:45" (1/1) ... [2025-01-09 22:27:45,298 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b75528f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:27:45, skipping insertion in model container [2025-01-09 22:27:45,298 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 10:27:45" (1/1) ... [2025-01-09 22:27:45,335 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-09 22:27:45,626 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-01-09 22:27:45,679 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-01-09 22:27:45,682 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-01-09 22:27:45,686 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 22:27:45,701 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) [2025-01-09 22:27:45,701 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@184e6b02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:27:45, skipping insertion in model container [2025-01-09 22:27:45,701 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-09 22:27:45,703 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2025-01-09 22:27:45,704 INFO L158 Benchmark]: Toolchain (without parser) took 413.14ms. Allocated memory is still 142.6MB. Free memory was 110.1MB in the beginning and 96.2MB in the end (delta: 13.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-01-09 22:27:45,705 INFO L158 Benchmark]: CDTParser took 1.13ms. Allocated memory is still 201.3MB. Free memory is still 123.1MB. There was no memory consumed. Max. memory is 16.1GB. [2025-01-09 22:27:45,705 INFO L158 Benchmark]: CACSL2BoogieTranslator took 409.28ms. Allocated memory is still 142.6MB. Free memory was 110.1MB in the beginning and 96.2MB in the end (delta: 13.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-01-09 22:27:45,706 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.13ms. Allocated memory is still 201.3MB. Free memory is still 123.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 409.28ms. Allocated memory is still 142.6MB. Free memory was 110.1MB in the beginning and 96.2MB in the end (delta: 13.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 607]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ldv-memsafety/memleaks_test19-2.i -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1df2ca055a97db0a00e0c4b03f212c5ac3c2765d37b628ab5708f179a281754f --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-09 22:27:47,782 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-09 22:27:47,880 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2025-01-09 22:27:47,885 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-09 22:27:47,886 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-09 22:27:47,905 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-09 22:27:47,906 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-09 22:27:47,906 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-09 22:27:47,906 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-09 22:27:47,906 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-09 22:27:47,906 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-09 22:27:47,906 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-09 22:27:47,907 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-09 22:27:47,907 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-09 22:27:47,907 INFO L153 SettingsManager]: * Use SBE=true [2025-01-09 22:27:47,907 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-09 22:27:47,907 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-09 22:27:47,907 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-09 22:27:47,908 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-09 22:27:47,908 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-09 22:27:47,908 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-01-09 22:27:47,908 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-01-09 22:27:47,909 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-01-09 22:27:47,909 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-09 22:27:47,910 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-01-09 22:27:47,910 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2025-01-09 22:27:47,910 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2025-01-09 22:27:47,910 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-01-09 22:27:47,910 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-09 22:27:47,910 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-09 22:27:47,910 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-09 22:27:47,910 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-09 22:27:47,910 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 22:27:47,910 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 22:27:47,910 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 22:27:47,910 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 22:27:47,910 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-09 22:27:47,910 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 22:27:47,911 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 22:27:47,911 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 22:27:47,911 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 22:27:47,911 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-09 22:27:47,911 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-09 22:27:47,911 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2025-01-09 22:27:47,911 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2025-01-09 22:27:47,911 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-09 22:27:47,911 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-09 22:27:47,911 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-09 22:27:47,911 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-09 22:27:47,911 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1df2ca055a97db0a00e0c4b03f212c5ac3c2765d37b628ab5708f179a281754f [2025-01-09 22:27:48,182 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-09 22:27:48,191 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-09 22:27:48,192 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-09 22:27:48,195 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-09 22:27:48,195 INFO L274 PluginConnector]: CDTParser initialized [2025-01-09 22:27:48,196 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test19-2.i [2025-01-09 22:27:49,511 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/a77a35f65/d86f1e1bd87f469bb105cee002fb1aeb/FLAG366c9c31d [2025-01-09 22:27:49,744 INFO L384 CDTParser]: Found 1 translation units. [2025-01-09 22:27:49,745 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test19-2.i [2025-01-09 22:27:49,757 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/a77a35f65/d86f1e1bd87f469bb105cee002fb1aeb/FLAG366c9c31d [2025-01-09 22:27:50,077 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/a77a35f65/d86f1e1bd87f469bb105cee002fb1aeb [2025-01-09 22:27:50,078 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-09 22:27:50,079 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-09 22:27:50,080 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-09 22:27:50,080 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-09 22:27:50,083 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-09 22:27:50,084 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 10:27:50" (1/1) ... [2025-01-09 22:27:50,084 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@424881e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:27:50, skipping insertion in model container [2025-01-09 22:27:50,084 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 10:27:50" (1/1) ... [2025-01-09 22:27:50,117 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-09 22:27:50,379 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-01-09 22:27:50,414 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-01-09 22:27:50,417 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-01-09 22:27:50,422 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 22:27:50,439 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2025-01-09 22:27:50,450 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-09 22:27:50,489 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-01-09 22:27:50,515 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-01-09 22:27:50,520 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-01-09 22:27:50,523 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 22:27:50,532 INFO L200 MainTranslator]: Completed pre-run [2025-01-09 22:27:50,597 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 22:27:50,646 INFO L204 MainTranslator]: Completed translation [2025-01-09 22:27:50,647 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:27:50 WrapperNode [2025-01-09 22:27:50,647 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-09 22:27:50,649 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-09 22:27:50,649 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-09 22:27:50,649 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-09 22:27:50,654 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:27:50" (1/1) ... [2025-01-09 22:27:50,680 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:27:50" (1/1) ... [2025-01-09 22:27:50,702 INFO L138 Inliner]: procedures = 171, calls = 87, calls flagged for inlining = 25, calls inlined = 7, statements flattened = 76 [2025-01-09 22:27:50,704 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-09 22:27:50,704 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-09 22:27:50,704 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-09 22:27:50,704 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-09 22:27:50,712 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:27:50" (1/1) ... [2025-01-09 22:27:50,712 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:27:50" (1/1) ... [2025-01-09 22:27:50,714 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:27:50" (1/1) ... [2025-01-09 22:27:50,737 INFO L175 MemorySlicer]: Split 9 memory accesses to 3 slices as follows [2, 0, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 0, 2]. [2025-01-09 22:27:50,737 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:27:50" (1/1) ... [2025-01-09 22:27:50,737 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:27:50" (1/1) ... [2025-01-09 22:27:50,750 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:27:50" (1/1) ... [2025-01-09 22:27:50,751 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:27:50" (1/1) ... [2025-01-09 22:27:50,752 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:27:50" (1/1) ... [2025-01-09 22:27:50,753 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:27:50" (1/1) ... [2025-01-09 22:27:50,758 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:27:50" (1/1) ... [2025-01-09 22:27:50,760 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-09 22:27:50,765 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-09 22:27:50,765 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-09 22:27:50,765 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-09 22:27:50,766 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:27:50" (1/1) ... [2025-01-09 22:27:50,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 22:27:50,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:27:50,796 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-01-09 22:27:50,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-01-09 22:27:50,819 INFO L130 BoogieDeclarations]: Found specification of procedure f19_undo [2025-01-09 22:27:50,820 INFO L138 BoogieDeclarations]: Found implementation of procedure f19_undo [2025-01-09 22:27:50,820 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2025-01-09 22:27:50,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2025-01-09 22:27:50,820 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-01-09 22:27:50,820 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-09 22:27:50,820 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-01-09 22:27:50,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-01-09 22:27:50,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2025-01-09 22:27:50,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2025-01-09 22:27:50,821 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-01-09 22:27:50,821 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2025-01-09 22:27:50,821 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2025-01-09 22:27:50,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-01-09 22:27:50,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2025-01-09 22:27:50,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2025-01-09 22:27:50,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2025-01-09 22:27:50,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-09 22:27:50,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-09 22:27:50,962 INFO L234 CfgBuilder]: Building ICFG [2025-01-09 22:27:50,964 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-09 22:27:51,243 INFO L? ?]: Removed 60 outVars from TransFormulas that were not future-live. [2025-01-09 22:27:51,243 INFO L283 CfgBuilder]: Performing block encoding [2025-01-09 22:27:51,255 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-09 22:27:51,256 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-01-09 22:27:51,256 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 10:27:51 BoogieIcfgContainer [2025-01-09 22:27:51,256 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-09 22:27:51,258 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-09 22:27:51,258 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-09 22:27:51,262 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-09 22:27:51,263 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 10:27:50" (1/3) ... [2025-01-09 22:27:51,263 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@255f863e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 10:27:51, skipping insertion in model container [2025-01-09 22:27:51,263 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:27:50" (2/3) ... [2025-01-09 22:27:51,263 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@255f863e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 10:27:51, skipping insertion in model container [2025-01-09 22:27:51,264 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 10:27:51" (3/3) ... [2025-01-09 22:27:51,265 INFO L128 eAbstractionObserver]: Analyzing ICFG memleaks_test19-2.i [2025-01-09 22:27:51,299 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-09 22:27:51,300 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG memleaks_test19-2.i that has 3 procedures, 70 locations, 1 initial locations, 0 loop locations, and 24 error locations. [2025-01-09 22:27:51,336 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-09 22:27:51,346 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;@4442c97, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-09 22:27:51,346 INFO L334 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2025-01-09 22:27:51,350 INFO L276 IsEmpty]: Start isEmpty. Operand has 70 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 64 states have internal predecessors, (69), 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) [2025-01-09 22:27:51,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-01-09 22:27:51,355 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:27:51,355 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:27:51,355 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-01-09 22:27:51,360 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:27:51,360 INFO L85 PathProgramCache]: Analyzing trace with hash 340389531, now seen corresponding path program 1 times [2025-01-09 22:27:51,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-09 22:27:51,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2087935985] [2025-01-09 22:27:51,366 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:27:51,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:27:51,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:27:51,368 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 22:27:51,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-01-09 22:27:51,439 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-01-09 22:27:51,449 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-01-09 22:27:51,450 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:27:51,450 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:27:51,451 INFO L256 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-01-09 22:27:51,455 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:27:51,499 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 7 [2025-01-09 22:27:51,554 WARN L873 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (store |c_old(#valid)| |ldv_malloc_#res.base| (select |c_#valid| |ldv_malloc_#res.base|)) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2025-01-09 22:27:51,609 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2025-01-09 22:27:51,611 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 [2025-01-09 22:27:51,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:27:51,626 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 22:27:51,627 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-09 22:27:51,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087935985] [2025-01-09 22:27:51,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087935985] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:27:51,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 22:27:51,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-09 22:27:51,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048454120] [2025-01-09 22:27:51,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:27:51,632 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 22:27:51,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-09 22:27:51,650 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 22:27:51,651 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=8, Unknown=1, NotChecked=4, Total=20 [2025-01-09 22:27:51,652 INFO L87 Difference]: Start difference. First operand has 70 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 64 states have internal predecessors, (69), 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 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-01-09 22:27:51,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:27:51,820 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2025-01-09 22:27:51,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 22:27:51,822 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2025-01-09 22:27:51,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:27:51,828 INFO L225 Difference]: With dead ends: 86 [2025-01-09 22:27:51,828 INFO L226 Difference]: Without dead ends: 84 [2025-01-09 22:27:51,829 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=8, Unknown=1, NotChecked=4, Total=20 [2025-01-09 22:27:51,831 INFO L435 NwaCegarLoop]: 77 mSDtfsCounter, 32 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 22:27:51,831 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 162 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 81 Invalid, 0 Unknown, 104 Unchecked, 0.1s Time] [2025-01-09 22:27:51,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2025-01-09 22:27:51,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 75. [2025-01-09 22:27:51,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 68 states have internal predecessors, (80), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2025-01-09 22:27:51,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2025-01-09 22:27:51,862 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 8 [2025-01-09 22:27:51,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:27:51,862 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2025-01-09 22:27:51,862 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-01-09 22:27:51,862 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2025-01-09 22:27:51,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-01-09 22:27:51,863 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:27:51,863 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:27:51,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-01-09 22:27:52,063 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:27:52,064 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-01-09 22:27:52,064 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:27:52,064 INFO L85 PathProgramCache]: Analyzing trace with hash 340389532, now seen corresponding path program 1 times [2025-01-09 22:27:52,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-09 22:27:52,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1212632362] [2025-01-09 22:27:52,065 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:27:52,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:27:52,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:27:52,068 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 22:27:52,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-01-09 22:27:52,129 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-01-09 22:27:52,142 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-01-09 22:27:52,142 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:27:52,142 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:27:52,143 INFO L256 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-01-09 22:27:52,145 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:27:52,174 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 [2025-01-09 22:27:52,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-01-09 22:27:52,239 WARN L873 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (store |c_old(#length)| |ldv_malloc_#res.base| (select |c_#length| |ldv_malloc_#res.base|)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2025-01-09 22:27:52,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-09 22:27:52,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-01-09 22:27:52,317 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-01-09 22:27:52,318 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 [2025-01-09 22:27:52,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:27:52,329 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 22:27:52,329 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-09 22:27:52,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212632362] [2025-01-09 22:27:52,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212632362] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:27:52,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 22:27:52,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 22:27:52,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146495294] [2025-01-09 22:27:52,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:27:52,332 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-09 22:27:52,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-09 22:27:52,332 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-09 22:27:52,333 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=13, Unknown=1, NotChecked=6, Total=30 [2025-01-09 22:27:52,333 INFO L87 Difference]: Start difference. First operand 75 states and 90 transitions. Second operand has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-01-09 22:27:52,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:27:52,528 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2025-01-09 22:27:52,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-09 22:27:52,529 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2025-01-09 22:27:52,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:27:52,530 INFO L225 Difference]: With dead ends: 84 [2025-01-09 22:27:52,530 INFO L226 Difference]: Without dead ends: 84 [2025-01-09 22:27:52,530 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=13, Unknown=1, NotChecked=6, Total=30 [2025-01-09 22:27:52,531 INFO L435 NwaCegarLoop]: 66 mSDtfsCounter, 31 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 22:27:52,531 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 169 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 127 Invalid, 0 Unknown, 105 Unchecked, 0.2s Time] [2025-01-09 22:27:52,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2025-01-09 22:27:52,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 77. [2025-01-09 22:27:52,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 69 states have internal predecessors, (82), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2025-01-09 22:27:52,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 94 transitions. [2025-01-09 22:27:52,537 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 94 transitions. Word has length 8 [2025-01-09 22:27:52,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:27:52,537 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 94 transitions. [2025-01-09 22:27:52,537 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-01-09 22:27:52,538 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 94 transitions. [2025-01-09 22:27:52,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-01-09 22:27:52,538 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:27:52,538 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:27:52,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-01-09 22:27:52,738 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:27:52,739 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-01-09 22:27:52,739 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:27:52,739 INFO L85 PathProgramCache]: Analyzing trace with hash 785062215, now seen corresponding path program 1 times [2025-01-09 22:27:52,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-09 22:27:52,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1935821103] [2025-01-09 22:27:52,740 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:27:52,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:27:52,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:27:52,743 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 22:27:52,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-01-09 22:27:52,798 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-01-09 22:27:52,810 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-01-09 22:27:52,810 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:27:52,810 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:27:52,811 INFO L256 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-01-09 22:27:52,812 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:27:52,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:27:52,849 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 22:27:52,849 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-09 22:27:52,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935821103] [2025-01-09 22:27:52,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935821103] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:27:52,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 22:27:52,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 22:27:52,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704298212] [2025-01-09 22:27:52,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:27:52,850 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 22:27:52,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-09 22:27:52,851 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 22:27:52,851 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-01-09 22:27:52,852 INFO L87 Difference]: Start difference. First operand 77 states and 94 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-01-09 22:27:52,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:27:52,878 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2025-01-09 22:27:52,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 22:27:52,878 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2025-01-09 22:27:52,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:27:52,879 INFO L225 Difference]: With dead ends: 80 [2025-01-09 22:27:52,879 INFO L226 Difference]: Without dead ends: 80 [2025-01-09 22:27:52,879 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-01-09 22:27:52,882 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 10 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 22:27:52,882 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 247 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 22:27:52,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2025-01-09 22:27:52,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2025-01-09 22:27:52,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 52 states have (on average 1.6346153846153846) internal successors, (85), 72 states have internal predecessors, (85), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2025-01-09 22:27:52,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 97 transitions. [2025-01-09 22:27:52,893 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 97 transitions. Word has length 15 [2025-01-09 22:27:52,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:27:52,893 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 97 transitions. [2025-01-09 22:27:52,894 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-01-09 22:27:52,894 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 97 transitions. [2025-01-09 22:27:52,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-01-09 22:27:52,894 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:27:52,894 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:27:52,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-01-09 22:27:53,095 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:27:53,095 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-01-09 22:27:53,096 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:27:53,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1103356198, now seen corresponding path program 1 times [2025-01-09 22:27:53,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-09 22:27:53,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1051571817] [2025-01-09 22:27:53,096 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:27:53,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:27:53,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:27:53,099 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 22:27:53,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-01-09 22:27:53,158 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-01-09 22:27:53,173 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-01-09 22:27:53,173 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:27:53,173 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:27:53,174 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-09 22:27:53,176 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:27:53,229 WARN L873 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (store |c_old(#valid)| |ldv_malloc_#res.base| (select |c_#valid| |ldv_malloc_#res.base|)) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2025-01-09 22:27:53,266 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2025-01-09 22:27:53,266 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 [2025-01-09 22:27:53,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:27:53,270 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 22:27:53,271 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-09 22:27:53,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051571817] [2025-01-09 22:27:53,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051571817] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:27:53,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 22:27:53,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 22:27:53,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041063037] [2025-01-09 22:27:53,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:27:53,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-09 22:27:53,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-09 22:27:53,272 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-09 22:27:53,272 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=14, Unknown=1, NotChecked=6, Total=30 [2025-01-09 22:27:53,272 INFO L87 Difference]: Start difference. First operand 80 states and 97 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 22:27:53,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:27:53,425 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2025-01-09 22:27:53,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-01-09 22:27:53,426 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2025-01-09 22:27:53,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:27:53,427 INFO L225 Difference]: With dead ends: 82 [2025-01-09 22:27:53,427 INFO L226 Difference]: Without dead ends: 82 [2025-01-09 22:27:53,427 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=20, Unknown=1, NotChecked=8, Total=42 [2025-01-09 22:27:53,427 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 29 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 22:27:53,428 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 192 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 108 Invalid, 0 Unknown, 99 Unchecked, 0.1s Time] [2025-01-09 22:27:53,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2025-01-09 22:27:53,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2025-01-09 22:27:53,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 52 states have (on average 1.5576923076923077) internal successors, (81), 70 states have internal predecessors, (81), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2025-01-09 22:27:53,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2025-01-09 22:27:53,439 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 17 [2025-01-09 22:27:53,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:27:53,439 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2025-01-09 22:27:53,439 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 22:27:53,440 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2025-01-09 22:27:53,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-01-09 22:27:53,440 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:27:53,440 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:27:53,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-01-09 22:27:53,640 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:27:53,641 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-01-09 22:27:53,642 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:27:53,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1103356199, now seen corresponding path program 1 times [2025-01-09 22:27:53,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-09 22:27:53,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [514230635] [2025-01-09 22:27:53,642 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:27:53,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:27:53,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:27:53,644 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 22:27:53,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-01-09 22:27:53,695 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-01-09 22:27:53,721 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-01-09 22:27:53,721 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:27:53,721 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:27:53,722 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-01-09 22:27:53,727 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:27:53,844 WARN L873 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (store |c_old(#length)| |ldv_malloc_#res.base| (select |c_#length| |ldv_malloc_#res.base|)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2025-01-09 22:27:53,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-09 22:27:53,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-01-09 22:27:53,876 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-01-09 22:27:53,877 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 [2025-01-09 22:27:53,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:27:53,891 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 22:27:53,891 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-09 22:27:53,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514230635] [2025-01-09 22:27:53,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514230635] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:27:53,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 22:27:53,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-01-09 22:27:53,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811051642] [2025-01-09 22:27:53,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:27:53,892 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-01-09 22:27:53,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-09 22:27:53,892 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-01-09 22:27:53,892 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=30, Unknown=1, NotChecked=10, Total=56 [2025-01-09 22:27:53,892 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 22:27:54,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:27:54,100 INFO L93 Difference]: Finished difference Result 79 states and 91 transitions. [2025-01-09 22:27:54,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-09 22:27:54,101 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2025-01-09 22:27:54,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:27:54,101 INFO L225 Difference]: With dead ends: 79 [2025-01-09 22:27:54,101 INFO L226 Difference]: Without dead ends: 79 [2025-01-09 22:27:54,101 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=38, Unknown=1, NotChecked=12, Total=72 [2025-01-09 22:27:54,102 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 41 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 22:27:54,102 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 227 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 140 Invalid, 0 Unknown, 102 Unchecked, 0.2s Time] [2025-01-09 22:27:54,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2025-01-09 22:27:54,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2025-01-09 22:27:54,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 52 states have (on average 1.4807692307692308) internal successors, (77), 68 states have internal predecessors, (77), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2025-01-09 22:27:54,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 89 transitions. [2025-01-09 22:27:54,107 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 89 transitions. Word has length 17 [2025-01-09 22:27:54,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:27:54,108 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 89 transitions. [2025-01-09 22:27:54,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 22:27:54,108 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 89 transitions. [2025-01-09 22:27:54,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-01-09 22:27:54,108 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:27:54,109 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:27:54,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-01-09 22:27:54,309 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:27:54,309 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-01-09 22:27:54,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:27:54,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1469021879, now seen corresponding path program 1 times [2025-01-09 22:27:54,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-09 22:27:54,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [952135028] [2025-01-09 22:27:54,310 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:27:54,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:27:54,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:27:54,313 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 22:27:54,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-01-09 22:27:54,362 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-01-09 22:27:54,372 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-01-09 22:27:54,373 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:27:54,373 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:27:54,374 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-01-09 22:27:54,375 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:27:54,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-01-09 22:27:54,425 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 20 treesize of output 8 [2025-01-09 22:27:54,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:27:54,436 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 22:27:54,436 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-09 22:27:54,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952135028] [2025-01-09 22:27:54,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952135028] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:27:54,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 22:27:54,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-01-09 22:27:54,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088712786] [2025-01-09 22:27:54,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:27:54,437 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-09 22:27:54,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-09 22:27:54,438 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-09 22:27:54,438 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-01-09 22:27:54,438 INFO L87 Difference]: Start difference. First operand 76 states and 89 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-01-09 22:27:54,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:27:54,513 INFO L93 Difference]: Finished difference Result 83 states and 98 transitions. [2025-01-09 22:27:54,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-09 22:27:54,514 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2025-01-09 22:27:54,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:27:54,515 INFO L225 Difference]: With dead ends: 83 [2025-01-09 22:27:54,515 INFO L226 Difference]: Without dead ends: 83 [2025-01-09 22:27:54,515 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-01-09 22:27:54,517 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 2 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 22:27:54,518 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 298 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 22:27:54,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2025-01-09 22:27:54,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2025-01-09 22:27:54,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 56 states have (on average 1.4464285714285714) internal successors, (81), 71 states have internal predecessors, (81), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2025-01-09 22:27:54,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 93 transitions. [2025-01-09 22:27:54,523 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 93 transitions. Word has length 17 [2025-01-09 22:27:54,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:27:54,523 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 93 transitions. [2025-01-09 22:27:54,523 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-01-09 22:27:54,524 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 93 transitions. [2025-01-09 22:27:54,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-01-09 22:27:54,524 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:27:54,524 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:27:54,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-01-09 22:27:54,725 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:27:54,725 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-01-09 22:27:54,725 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:27:54,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1762424886, now seen corresponding path program 1 times [2025-01-09 22:27:54,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-09 22:27:54,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1296910501] [2025-01-09 22:27:54,726 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:27:54,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:27:54,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:27:54,729 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 22:27:54,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-01-09 22:27:54,777 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-01-09 22:27:54,789 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-01-09 22:27:54,789 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:27:54,789 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:27:54,790 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-09 22:27:54,791 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:27:54,897 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~#a19~0#1.base_7| (_ BitVec 32))) (and (= (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_entry_point_~#a19~0#1.base_7| (_ bv0 1)) |c_#valid|) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_entry_point_~#a19~0#1.base_7|)))) is different from true [2025-01-09 22:27:54,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:27:54,902 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 22:27:54,902 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-09 22:27:54,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296910501] [2025-01-09 22:27:54,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296910501] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:27:54,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 22:27:54,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-09 22:27:54,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969636831] [2025-01-09 22:27:54,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:27:54,903 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 22:27:54,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-09 22:27:54,903 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 22:27:54,903 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=8, Unknown=1, NotChecked=4, Total=20 [2025-01-09 22:27:54,903 INFO L87 Difference]: Start difference. First operand 80 states and 93 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-01-09 22:27:55,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:27:55,019 INFO L93 Difference]: Finished difference Result 111 states and 130 transitions. [2025-01-09 22:27:55,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 22:27:55,020 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2025-01-09 22:27:55,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:27:55,021 INFO L225 Difference]: With dead ends: 111 [2025-01-09 22:27:55,021 INFO L226 Difference]: Without dead ends: 105 [2025-01-09 22:27:55,021 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=8, Unknown=1, NotChecked=4, Total=20 [2025-01-09 22:27:55,021 INFO L435 NwaCegarLoop]: 87 mSDtfsCounter, 36 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 22:27:55,022 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 185 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 84 Invalid, 0 Unknown, 112 Unchecked, 0.1s Time] [2025-01-09 22:27:55,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2025-01-09 22:27:55,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 88. [2025-01-09 22:27:55,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 63 states have (on average 1.4285714285714286) internal successors, (90), 78 states have internal predecessors, (90), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2025-01-09 22:27:55,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 105 transitions. [2025-01-09 22:27:55,027 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 105 transitions. Word has length 17 [2025-01-09 22:27:55,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:27:55,027 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 105 transitions. [2025-01-09 22:27:55,028 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-01-09 22:27:55,028 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 105 transitions. [2025-01-09 22:27:55,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-01-09 22:27:55,028 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:27:55,028 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:27:55,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-01-09 22:27:55,229 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:27:55,229 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-01-09 22:27:55,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:27:55,229 INFO L85 PathProgramCache]: Analyzing trace with hash -466829256, now seen corresponding path program 1 times [2025-01-09 22:27:55,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-09 22:27:55,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1260347484] [2025-01-09 22:27:55,230 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:27:55,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:27:55,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:27:55,231 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 22:27:55,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-01-09 22:27:55,286 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-01-09 22:27:55,301 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-01-09 22:27:55,301 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:27:55,302 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:27:55,303 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-01-09 22:27:55,304 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:27:55,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 22:27:55,320 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 22:27:55,320 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-09 22:27:55,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260347484] [2025-01-09 22:27:55,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260347484] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:27:55,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 22:27:55,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-09 22:27:55,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574479757] [2025-01-09 22:27:55,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:27:55,321 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-09 22:27:55,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-09 22:27:55,322 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-09 22:27:55,322 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-09 22:27:55,322 INFO L87 Difference]: Start difference. First operand 88 states and 105 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-01-09 22:27:55,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:27:55,337 INFO L93 Difference]: Finished difference Result 105 states and 122 transitions. [2025-01-09 22:27:55,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-09 22:27:55,338 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2025-01-09 22:27:55,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:27:55,339 INFO L225 Difference]: With dead ends: 105 [2025-01-09 22:27:55,339 INFO L226 Difference]: Without dead ends: 105 [2025-01-09 22:27:55,339 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-09 22:27:55,339 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 13 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 22:27:55,340 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 199 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 22:27:55,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2025-01-09 22:27:55,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 94. [2025-01-09 22:27:55,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 69 states have (on average 1.391304347826087) internal successors, (96), 84 states have internal predecessors, (96), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2025-01-09 22:27:55,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 111 transitions. [2025-01-09 22:27:55,350 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 111 transitions. Word has length 23 [2025-01-09 22:27:55,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:27:55,350 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 111 transitions. [2025-01-09 22:27:55,350 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-01-09 22:27:55,350 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 111 transitions. [2025-01-09 22:27:55,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-01-09 22:27:55,350 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:27:55,351 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:27:55,360 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-01-09 22:27:55,551 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:27:55,551 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-01-09 22:27:55,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:27:55,552 INFO L85 PathProgramCache]: Analyzing trace with hash -466769674, now seen corresponding path program 1 times [2025-01-09 22:27:55,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-09 22:27:55,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [53583825] [2025-01-09 22:27:55,552 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:27:55,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:27:55,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:27:55,554 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 22:27:55,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-01-09 22:27:55,610 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-01-09 22:27:55,626 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-01-09 22:27:55,626 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:27:55,626 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:27:55,629 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-01-09 22:27:55,630 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:27:55,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 22:27:55,655 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 22:27:55,656 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-09 22:27:55,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53583825] [2025-01-09 22:27:55,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53583825] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:27:55,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 22:27:55,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-09 22:27:55,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772580239] [2025-01-09 22:27:55,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:27:55,659 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-09 22:27:55,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-09 22:27:55,659 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-09 22:27:55,659 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-09 22:27:55,659 INFO L87 Difference]: Start difference. First operand 94 states and 111 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 22:27:55,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:27:55,727 INFO L93 Difference]: Finished difference Result 96 states and 114 transitions. [2025-01-09 22:27:55,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 22:27:55,727 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2025-01-09 22:27:55,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:27:55,728 INFO L225 Difference]: With dead ends: 96 [2025-01-09 22:27:55,729 INFO L226 Difference]: Without dead ends: 96 [2025-01-09 22:27:55,729 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-01-09 22:27:55,730 INFO L435 NwaCegarLoop]: 60 mSDtfsCounter, 10 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 22:27:55,730 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 137 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 22:27:55,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2025-01-09 22:27:55,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2025-01-09 22:27:55,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 70 states have (on average 1.4) internal successors, (98), 84 states have internal predecessors, (98), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2025-01-09 22:27:55,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 113 transitions. [2025-01-09 22:27:55,737 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 113 transitions. Word has length 23 [2025-01-09 22:27:55,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:27:55,738 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 113 transitions. [2025-01-09 22:27:55,738 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 22:27:55,738 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 113 transitions. [2025-01-09 22:27:55,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-01-09 22:27:55,738 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:27:55,738 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:27:55,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-01-09 22:27:55,939 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:27:55,939 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-01-09 22:27:55,939 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:27:55,939 INFO L85 PathProgramCache]: Analyzing trace with hash -466769673, now seen corresponding path program 1 times [2025-01-09 22:27:55,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-09 22:27:55,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [776930315] [2025-01-09 22:27:55,940 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:27:55,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:27:55,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:27:55,942 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 22:27:55,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-01-09 22:27:55,997 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-01-09 22:27:56,012 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-01-09 22:27:56,012 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:27:56,012 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:27:56,014 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-01-09 22:27:56,015 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:27:56,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-01-09 22:27:56,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2025-01-09 22:27:56,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-09 22:27:56,065 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 22:27:56,065 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-09 22:27:56,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776930315] [2025-01-09 22:27:56,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776930315] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:27:56,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 22:27:56,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-01-09 22:27:56,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574334723] [2025-01-09 22:27:56,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:27:56,065 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-09 22:27:56,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-09 22:27:56,066 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-09 22:27:56,066 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-01-09 22:27:56,066 INFO L87 Difference]: Start difference. First operand 95 states and 113 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2025-01-09 22:27:56,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:27:56,115 INFO L93 Difference]: Finished difference Result 92 states and 107 transitions. [2025-01-09 22:27:56,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-09 22:27:56,115 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2025-01-09 22:27:56,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:27:56,116 INFO L225 Difference]: With dead ends: 92 [2025-01-09 22:27:56,116 INFO L226 Difference]: Without dead ends: 92 [2025-01-09 22:27:56,116 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-01-09 22:27:56,117 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 0 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 22:27:56,117 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 300 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 22:27:56,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2025-01-09 22:27:56,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2025-01-09 22:27:56,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 67 states have (on average 1.373134328358209) internal successors, (92), 81 states have internal predecessors, (92), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2025-01-09 22:27:56,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 107 transitions. [2025-01-09 22:27:56,123 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 107 transitions. Word has length 23 [2025-01-09 22:27:56,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:27:56,124 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 107 transitions. [2025-01-09 22:27:56,124 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2025-01-09 22:27:56,124 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 107 transitions. [2025-01-09 22:27:56,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-01-09 22:27:56,125 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:27:56,125 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:27:56,131 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-01-09 22:27:56,325 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:27:56,326 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-01-09 22:27:56,326 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:27:56,326 INFO L85 PathProgramCache]: Analyzing trace with hash 913057966, now seen corresponding path program 1 times [2025-01-09 22:27:56,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-09 22:27:56,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [230773042] [2025-01-09 22:27:56,326 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:27:56,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:27:56,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:27:56,328 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 22:27:56,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-01-09 22:27:56,383 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-01-09 22:27:56,407 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-01-09 22:27:56,407 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:27:56,407 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:27:56,412 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-01-09 22:27:56,414 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:27:56,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-01-09 22:27:56,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2025-01-09 22:27:56,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:27:56,554 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 22:27:56,621 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-09 22:27:56,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230773042] [2025-01-09 22:27:56,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230773042] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:27:56,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [955970117] [2025-01-09 22:27:56,622 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:27:56,622 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2025-01-09 22:27:56,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/cvc4 [2025-01-09 22:27:56,643 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2025-01-09 22:27:56,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2025-01-09 22:27:56,725 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-01-09 22:27:56,781 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-01-09 22:27:56,782 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:27:56,782 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:27:56,783 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-01-09 22:27:56,785 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:27:56,826 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 [2025-01-09 22:27:56,965 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 [2025-01-09 22:27:57,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:27:57,014 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 22:27:57,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [955970117] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:27:57,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 22:27:57,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2025-01-09 22:27:57,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112827219] [2025-01-09 22:27:57,049 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 22:27:57,049 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-01-09 22:27:57,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-09 22:27:57,049 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-01-09 22:27:57,050 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2025-01-09 22:27:57,050 INFO L87 Difference]: Start difference. First operand 92 states and 107 transitions. Second operand has 13 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-01-09 22:27:57,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:27:57,203 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2025-01-09 22:27:57,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-01-09 22:27:57,203 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 24 [2025-01-09 22:27:57,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:27:57,205 INFO L225 Difference]: With dead ends: 98 [2025-01-09 22:27:57,205 INFO L226 Difference]: Without dead ends: 98 [2025-01-09 22:27:57,205 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2025-01-09 22:27:57,206 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 59 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 22:27:57,207 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 370 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 22:27:57,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2025-01-09 22:27:57,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2025-01-09 22:27:57,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 71 states have (on average 1.352112676056338) internal successors, (96), 85 states have internal predecessors, (96), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2025-01-09 22:27:57,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 111 transitions. [2025-01-09 22:27:57,214 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 111 transitions. Word has length 24 [2025-01-09 22:27:57,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:27:57,215 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 111 transitions. [2025-01-09 22:27:57,215 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-01-09 22:27:57,215 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 111 transitions. [2025-01-09 22:27:57,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-01-09 22:27:57,217 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:27:57,217 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:27:57,225 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-01-09 22:27:57,420 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2025-01-09 22:27:57,618 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2025-01-09 22:27:57,618 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-01-09 22:27:57,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:27:57,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1759974027, now seen corresponding path program 1 times [2025-01-09 22:27:57,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-09 22:27:57,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1168397279] [2025-01-09 22:27:57,619 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:27:57,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:27:57,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:27:57,621 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 22:27:57,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-01-09 22:27:57,679 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-01-09 22:27:57,696 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-01-09 22:27:57,696 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:27:57,697 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:27:57,698 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-01-09 22:27:57,700 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:27:57,720 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 19 treesize of output 1 [2025-01-09 22:27:57,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2025-01-09 22:27:57,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2025-01-09 22:27:57,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:27:57,874 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 22:27:57,969 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-09 22:27:57,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168397279] [2025-01-09 22:27:57,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168397279] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:27:57,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [779887528] [2025-01-09 22:27:57,970 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:27:57,970 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2025-01-09 22:27:57,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/cvc4 [2025-01-09 22:27:57,972 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2025-01-09 22:27:57,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2025-01-09 22:27:58,061 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-01-09 22:27:58,110 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-01-09 22:27:58,110 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:27:58,110 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:27:58,112 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-01-09 22:27:58,114 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:27:58,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-01-09 22:27:58,344 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 [2025-01-09 22:27:58,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-01-09 22:27:58,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:27:58,383 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 22:27:58,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [779887528] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:27:58,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 22:27:58,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2025-01-09 22:27:58,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164594881] [2025-01-09 22:27:58,470 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 22:27:58,470 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-01-09 22:27:58,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-09 22:27:58,471 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-01-09 22:27:58,471 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2025-01-09 22:27:58,471 INFO L87 Difference]: Start difference. First operand 97 states and 111 transitions. Second operand has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-01-09 22:28:02,489 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] [2025-01-09 22:28:06,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-01-09 22:28:10,948 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-01-09 22:28:12,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-01-09 22:28:17,550 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-01-09 22:28:21,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-01-09 22:28:22,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:28:22,101 INFO L93 Difference]: Finished difference Result 154 states and 171 transitions. [2025-01-09 22:28:22,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-01-09 22:28:22,102 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 25 [2025-01-09 22:28:22,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:28:22,103 INFO L225 Difference]: With dead ends: 154 [2025-01-09 22:28:22,103 INFO L226 Difference]: Without dead ends: 154 [2025-01-09 22:28:22,104 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2025-01-09 22:28:22,104 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 110 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 9 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.4s IncrementalHoareTripleChecker+Time [2025-01-09 22:28:22,104 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 309 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 190 Invalid, 5 Unknown, 0 Unchecked, 23.4s Time] [2025-01-09 22:28:22,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2025-01-09 22:28:22,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 134. [2025-01-09 22:28:22,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 102 states have (on average 1.411764705882353) internal successors, (144), 117 states have internal predecessors, (144), 9 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (12), 11 states have call predecessors, (12), 9 states have call successors, (12) [2025-01-09 22:28:22,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 165 transitions. [2025-01-09 22:28:22,110 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 165 transitions. Word has length 25 [2025-01-09 22:28:22,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:28:22,110 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 165 transitions. [2025-01-09 22:28:22,111 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-01-09 22:28:22,111 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 165 transitions. [2025-01-09 22:28:22,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-01-09 22:28:22,111 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:28:22,112 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:28:22,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2025-01-09 22:28:22,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-01-09 22:28:22,512 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:28:22,513 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-01-09 22:28:22,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:28:22,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1548623114, now seen corresponding path program 1 times [2025-01-09 22:28:22,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-09 22:28:22,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2109695401] [2025-01-09 22:28:22,513 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:28:22,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:28:22,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:28:22,517 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 22:28:22,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-01-09 22:28:22,571 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-01-09 22:28:22,587 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-01-09 22:28:22,587 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:28:22,587 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:28:22,589 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-01-09 22:28:22,591 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:28:22,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-01-09 22:28:22,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-01-09 22:28:22,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:28:22,971 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 22:28:22,971 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-09 22:28:22,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109695401] [2025-01-09 22:28:22,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109695401] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:28:22,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 22:28:22,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-01-09 22:28:22,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589867129] [2025-01-09 22:28:22,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:28:22,972 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-09 22:28:22,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-09 22:28:22,972 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-09 22:28:22,972 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-01-09 22:28:22,972 INFO L87 Difference]: Start difference. First operand 134 states and 165 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 22:28:23,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:28:23,238 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2025-01-09 22:28:23,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-09 22:28:23,239 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2025-01-09 22:28:23,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:28:23,240 INFO L225 Difference]: With dead ends: 83 [2025-01-09 22:28:23,240 INFO L226 Difference]: Without dead ends: 77 [2025-01-09 22:28:23,240 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-01-09 22:28:23,241 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 1 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 22:28:23,241 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 314 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-09 22:28:23,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2025-01-09 22:28:23,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2025-01-09 22:28:23,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 54 states have (on average 1.3703703703703705) internal successors, (74), 67 states have internal predecessors, (74), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2025-01-09 22:28:23,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2025-01-09 22:28:23,244 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 25 [2025-01-09 22:28:23,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:28:23,244 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2025-01-09 22:28:23,244 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 22:28:23,244 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2025-01-09 22:28:23,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-01-09 22:28:23,245 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:28:23,245 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:28:23,253 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-01-09 22:28:23,445 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:28:23,446 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-01-09 22:28:23,446 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:28:23,446 INFO L85 PathProgramCache]: Analyzing trace with hash -2049303106, now seen corresponding path program 1 times [2025-01-09 22:28:23,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-09 22:28:23,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1949131049] [2025-01-09 22:28:23,446 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:28:23,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:28:23,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:28:23,448 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 22:28:23,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-01-09 22:28:23,508 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-01-09 22:28:23,524 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-01-09 22:28:23,524 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:28:23,525 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:28:23,527 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-09 22:28:23,528 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:28:23,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 22:28:23,802 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 22:28:23,802 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-09 22:28:23,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949131049] [2025-01-09 22:28:23,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949131049] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:28:23,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 22:28:23,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 22:28:23,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512691651] [2025-01-09 22:28:23,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:28:23,803 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-09 22:28:23,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-09 22:28:23,803 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-09 22:28:23,803 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-01-09 22:28:23,803 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 22:28:24,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:28:24,501 INFO L93 Difference]: Finished difference Result 87 states and 95 transitions. [2025-01-09 22:28:24,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-01-09 22:28:24,502 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2025-01-09 22:28:24,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:28:24,503 INFO L225 Difference]: With dead ends: 87 [2025-01-09 22:28:24,503 INFO L226 Difference]: Without dead ends: 87 [2025-01-09 22:28:24,503 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-01-09 22:28:24,503 INFO L435 NwaCegarLoop]: 54 mSDtfsCounter, 16 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-01-09 22:28:24,503 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 194 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-01-09 22:28:24,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2025-01-09 22:28:24,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2025-01-09 22:28:24,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 56 states have (on average 1.375) internal successors, (77), 68 states have internal predecessors, (77), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2025-01-09 22:28:24,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2025-01-09 22:28:24,507 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 27 [2025-01-09 22:28:24,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:28:24,507 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2025-01-09 22:28:24,507 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 22:28:24,508 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2025-01-09 22:28:24,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-01-09 22:28:24,508 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:28:24,508 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:28:24,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-01-09 22:28:24,708 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:28:24,709 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-01-09 22:28:24,709 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:28:24,709 INFO L85 PathProgramCache]: Analyzing trace with hash -2049303105, now seen corresponding path program 1 times [2025-01-09 22:28:24,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-09 22:28:24,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [721244182] [2025-01-09 22:28:24,709 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:28:24,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:28:24,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:28:24,712 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 22:28:24,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-01-09 22:28:24,778 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-01-09 22:28:24,792 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-01-09 22:28:24,793 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:28:24,793 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:28:24,794 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-01-09 22:28:24,795 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:28:25,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 22:28:25,448 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 22:28:25,448 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-09 22:28:25,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721244182] [2025-01-09 22:28:25,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721244182] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:28:25,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 22:28:25,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-01-09 22:28:25,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347754023] [2025-01-09 22:28:25,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:28:25,449 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-01-09 22:28:25,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-09 22:28:25,449 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-01-09 22:28:25,449 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-01-09 22:28:25,449 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 22:28:25,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:28:25,968 INFO L93 Difference]: Finished difference Result 88 states and 95 transitions. [2025-01-09 22:28:25,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-09 22:28:25,969 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2025-01-09 22:28:25,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:28:25,970 INFO L225 Difference]: With dead ends: 88 [2025-01-09 22:28:25,970 INFO L226 Difference]: Without dead ends: 88 [2025-01-09 22:28:25,970 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2025-01-09 22:28:25,970 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 21 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-01-09 22:28:25,970 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 186 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-01-09 22:28:25,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2025-01-09 22:28:25,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2025-01-09 22:28:25,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 60 states have (on average 1.3833333333333333) internal successors, (83), 73 states have internal predecessors, (83), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2025-01-09 22:28:25,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2025-01-09 22:28:25,973 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 27 [2025-01-09 22:28:25,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:28:25,974 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2025-01-09 22:28:25,974 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 22:28:25,974 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2025-01-09 22:28:25,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-01-09 22:28:25,975 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:28:25,975 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:28:25,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-01-09 22:28:26,175 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:28:26,175 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-01-09 22:28:26,176 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:28:26,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1275380112, now seen corresponding path program 1 times [2025-01-09 22:28:26,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-09 22:28:26,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [107024277] [2025-01-09 22:28:26,176 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:28:26,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:28:26,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:28:26,178 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 22:28:26,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-01-09 22:28:26,231 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-01-09 22:28:26,245 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-01-09 22:28:26,245 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:28:26,245 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:28:26,246 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-01-09 22:28:26,247 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:28:26,259 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 [2025-01-09 22:28:26,361 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 19 treesize of output 1 [2025-01-09 22:28:26,574 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 13 treesize of output 5 [2025-01-09 22:28:26,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2025-01-09 22:28:26,855 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 23 treesize of output 11 [2025-01-09 22:28:26,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:28:26,969 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 22:28:31,340 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-09 22:28:31,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107024277] [2025-01-09 22:28:31,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107024277] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:28:31,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1201514236] [2025-01-09 22:28:31,340 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:28:31,340 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2025-01-09 22:28:31,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/cvc4 [2025-01-09 22:28:31,342 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2025-01-09 22:28:31,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2025-01-09 22:28:31,431 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-01-09 22:28:31,475 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-01-09 22:28:31,475 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:28:31,475 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:28:31,477 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-01-09 22:28:31,478 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:28:31,579 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 [2025-01-09 22:28:31,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-01-09 22:28:32,027 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 11 treesize of output 5 [2025-01-09 22:28:32,128 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 27 treesize of output 15 [2025-01-09 22:28:32,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-01-09 22:28:32,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:28:32,282 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 22:28:32,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1201514236] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:28:32,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 22:28:32,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2025-01-09 22:28:32,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132656855] [2025-01-09 22:28:32,859 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 22:28:32,860 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-01-09 22:28:32,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-09 22:28:32,860 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-01-09 22:28:32,860 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=121, Unknown=1, NotChecked=0, Total=156 [2025-01-09 22:28:32,860 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand has 12 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 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) [2025-01-09 22:28:34,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:28:34,164 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2025-01-09 22:28:34,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-09 22:28:34,164 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 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) Word has length 26 [2025-01-09 22:28:34,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:28:34,165 INFO L225 Difference]: With dead ends: 89 [2025-01-09 22:28:34,165 INFO L226 Difference]: Without dead ends: 89 [2025-01-09 22:28:34,165 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=34, Invalid=121, Unknown=1, NotChecked=0, Total=156 [2025-01-09 22:28:34,166 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 26 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2025-01-09 22:28:34,166 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 374 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2025-01-09 22:28:34,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2025-01-09 22:28:34,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2025-01-09 22:28:34,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 63 states have (on average 1.3650793650793651) internal successors, (86), 76 states have internal predecessors, (86), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2025-01-09 22:28:34,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 97 transitions. [2025-01-09 22:28:34,168 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 97 transitions. Word has length 26 [2025-01-09 22:28:34,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:28:34,169 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 97 transitions. [2025-01-09 22:28:34,169 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 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) [2025-01-09 22:28:34,169 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 97 transitions. [2025-01-09 22:28:34,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-01-09 22:28:34,169 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:28:34,169 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:28:34,179 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-01-09 22:28:34,377 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2025-01-09 22:28:34,574 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2025-01-09 22:28:34,574 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-01-09 22:28:34,575 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:28:34,575 INFO L85 PathProgramCache]: Analyzing trace with hash 896113127, now seen corresponding path program 1 times [2025-01-09 22:28:34,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-09 22:28:34,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [663750669] [2025-01-09 22:28:34,575 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:28:34,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:28:34,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:28:34,578 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 22:28:34,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-01-09 22:28:34,646 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-01-09 22:28:34,662 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-01-09 22:28:34,662 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:28:34,662 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:28:34,664 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-01-09 22:28:34,665 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:28:34,898 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 [2025-01-09 22:28:35,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-09 22:28:35,282 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 22:28:35,282 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-09 22:28:35,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663750669] [2025-01-09 22:28:35,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663750669] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:28:35,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 22:28:35,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-01-09 22:28:35,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641559531] [2025-01-09 22:28:35,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:28:35,282 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-01-09 22:28:35,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-09 22:28:35,283 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-01-09 22:28:35,283 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2025-01-09 22:28:35,283 INFO L87 Difference]: Start difference. First operand 87 states and 97 transitions. Second operand has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 22:28:35,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:28:35,889 INFO L93 Difference]: Finished difference Result 90 states and 97 transitions. [2025-01-09 22:28:35,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-01-09 22:28:35,890 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (3), 2 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 28 [2025-01-09 22:28:35,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:28:35,890 INFO L225 Difference]: With dead ends: 90 [2025-01-09 22:28:35,891 INFO L226 Difference]: Without dead ends: 90 [2025-01-09 22:28:35,891 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2025-01-09 22:28:35,891 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 13 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-01-09 22:28:35,891 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 345 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-01-09 22:28:35,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2025-01-09 22:28:35,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2025-01-09 22:28:35,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 63 states have (on average 1.3492063492063493) internal successors, (85), 76 states have internal predecessors, (85), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2025-01-09 22:28:35,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 96 transitions. [2025-01-09 22:28:35,894 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 96 transitions. Word has length 28 [2025-01-09 22:28:35,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:28:35,895 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 96 transitions. [2025-01-09 22:28:35,895 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 22:28:35,895 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 96 transitions. [2025-01-09 22:28:35,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-01-09 22:28:35,895 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:28:35,895 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:28:35,904 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-01-09 22:28:36,099 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:28:36,099 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-01-09 22:28:36,099 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:28:36,100 INFO L85 PathProgramCache]: Analyzing trace with hash -2049269858, now seen corresponding path program 1 times [2025-01-09 22:28:36,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-09 22:28:36,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [441329541] [2025-01-09 22:28:36,100 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:28:36,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:28:36,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:28:36,102 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 22:28:36,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-01-09 22:28:36,159 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-01-09 22:28:36,171 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-01-09 22:28:36,171 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:28:36,171 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:28:36,172 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-09 22:28:36,173 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:28:36,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 22:28:36,441 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 22:28:36,441 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-09 22:28:36,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441329541] [2025-01-09 22:28:36,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441329541] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:28:36,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 22:28:36,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 22:28:36,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371706822] [2025-01-09 22:28:36,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:28:36,442 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-09 22:28:36,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-09 22:28:36,442 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-09 22:28:36,442 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-01-09 22:28:36,442 INFO L87 Difference]: Start difference. First operand 87 states and 96 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 22:28:37,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:28:37,106 INFO L93 Difference]: Finished difference Result 98 states and 108 transitions. [2025-01-09 22:28:37,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-09 22:28:37,107 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2025-01-09 22:28:37,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:28:37,108 INFO L225 Difference]: With dead ends: 98 [2025-01-09 22:28:37,108 INFO L226 Difference]: Without dead ends: 98 [2025-01-09 22:28:37,108 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2025-01-09 22:28:37,108 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 44 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-01-09 22:28:37,109 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 173 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-01-09 22:28:37,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2025-01-09 22:28:37,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 90. [2025-01-09 22:28:37,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 66 states have (on average 1.3636363636363635) internal successors, (90), 79 states have internal predecessors, (90), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2025-01-09 22:28:37,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 101 transitions. [2025-01-09 22:28:37,112 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 101 transitions. Word has length 27 [2025-01-09 22:28:37,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:28:37,113 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 101 transitions. [2025-01-09 22:28:37,113 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 22:28:37,113 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 101 transitions. [2025-01-09 22:28:37,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-01-09 22:28:37,114 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:28:37,114 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:28:37,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-01-09 22:28:37,315 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:28:37,315 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-01-09 22:28:37,315 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:28:37,315 INFO L85 PathProgramCache]: Analyzing trace with hash -2049269857, now seen corresponding path program 1 times [2025-01-09 22:28:37,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-09 22:28:37,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1224672875] [2025-01-09 22:28:37,316 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:28:37,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:28:37,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:28:37,318 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 22:28:37,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-01-09 22:28:37,380 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-01-09 22:28:37,395 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-01-09 22:28:37,395 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:28:37,395 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:28:37,397 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-01-09 22:28:37,398 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:28:37,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-01-09 22:28:37,468 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 [2025-01-09 22:28:37,656 WARN L873 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (store |c_old(#length)| |ldv_malloc_#res.base| (select |c_#length| |ldv_malloc_#res.base|)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2025-01-09 22:28:37,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-09 22:28:37,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-01-09 22:28:37,819 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-01-09 22:28:37,819 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 [2025-01-09 22:28:38,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-09 22:28:38,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-01-09 22:28:38,419 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-01-09 22:28:38,419 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 [2025-01-09 22:28:38,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 22:28:38,957 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 22:28:38,957 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-09 22:28:38,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224672875] [2025-01-09 22:28:38,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224672875] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:28:38,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 22:28:38,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-01-09 22:28:38,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259872760] [2025-01-09 22:28:38,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:28:38,957 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-01-09 22:28:38,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-09 22:28:38,958 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-01-09 22:28:38,958 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=52, Unknown=1, NotChecked=14, Total=90 [2025-01-09 22:28:38,958 INFO L87 Difference]: Start difference. First operand 90 states and 101 transitions. Second operand has 10 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 22:28:40,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:28:40,080 INFO L93 Difference]: Finished difference Result 91 states and 101 transitions. [2025-01-09 22:28:40,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-01-09 22:28:40,080 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2025-01-09 22:28:40,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:28:40,081 INFO L225 Difference]: With dead ends: 91 [2025-01-09 22:28:40,081 INFO L226 Difference]: Without dead ends: 91 [2025-01-09 22:28:40,081 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=30, Invalid=63, Unknown=1, NotChecked=16, Total=110 [2025-01-09 22:28:40,081 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 46 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2025-01-09 22:28:40,082 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 198 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 210 Invalid, 0 Unknown, 98 Unchecked, 1.0s Time] [2025-01-09 22:28:40,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2025-01-09 22:28:40,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2025-01-09 22:28:40,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 66 states have (on average 1.3333333333333333) internal successors, (88), 78 states have internal predecessors, (88), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2025-01-09 22:28:40,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2025-01-09 22:28:40,085 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 27 [2025-01-09 22:28:40,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:28:40,086 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2025-01-09 22:28:40,086 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 22:28:40,086 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2025-01-09 22:28:40,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-01-09 22:28:40,086 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:28:40,087 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:28:40,094 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2025-01-09 22:28:40,287 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:28:40,287 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting f19_undoErr3ASSERT_VIOLATIONMEMORY_FREE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-01-09 22:28:40,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:28:40,288 INFO L85 PathProgramCache]: Analyzing trace with hash 2009703198, now seen corresponding path program 1 times [2025-01-09 22:28:40,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-09 22:28:40,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [330054118] [2025-01-09 22:28:40,288 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:28:40,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:28:40,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:28:40,290 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 22:28:40,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-01-09 22:28:40,359 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-01-09 22:28:40,381 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-01-09 22:28:40,381 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:28:40,381 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:28:40,383 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-01-09 22:28:40,384 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:28:40,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-01-09 22:28:41,050 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 23 treesize of output 11 [2025-01-09 22:28:41,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-09 22:28:41,156 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 22:28:41,156 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-09 22:28:41,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330054118] [2025-01-09 22:28:41,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330054118] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:28:41,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 22:28:41,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-01-09 22:28:41,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594101202] [2025-01-09 22:28:41,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:28:41,156 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-01-09 22:28:41,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-09 22:28:41,157 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-01-09 22:28:41,157 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2025-01-09 22:28:41,157 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 22:28:42,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:28:42,231 INFO L93 Difference]: Finished difference Result 98 states and 107 transitions. [2025-01-09 22:28:42,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-01-09 22:28:42,232 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (3), 2 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 [2025-01-09 22:28:42,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:28:42,232 INFO L225 Difference]: With dead ends: 98 [2025-01-09 22:28:42,232 INFO L226 Difference]: Without dead ends: 98 [2025-01-09 22:28:42,233 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2025-01-09 22:28:42,233 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 13 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-01-09 22:28:42,233 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 297 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-01-09 22:28:42,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2025-01-09 22:28:42,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2025-01-09 22:28:42,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 72 states have (on average 1.3194444444444444) internal successors, (95), 84 states have internal predecessors, (95), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2025-01-09 22:28:42,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2025-01-09 22:28:42,237 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 29 [2025-01-09 22:28:42,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:28:42,237 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2025-01-09 22:28:42,238 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 22:28:42,238 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2025-01-09 22:28:42,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-01-09 22:28:42,238 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:28:42,238 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:28:42,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-01-09 22:28:42,439 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:28:42,439 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-01-09 22:28:42,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:28:42,440 INFO L85 PathProgramCache]: Analyzing trace with hash 897143893, now seen corresponding path program 1 times [2025-01-09 22:28:42,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-09 22:28:42,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [461097064] [2025-01-09 22:28:42,440 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:28:42,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:28:42,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:28:42,442 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 22:28:42,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-01-09 22:28:42,509 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-01-09 22:28:42,523 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-01-09 22:28:42,523 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:28:42,523 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:28:42,525 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-01-09 22:28:42,527 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:28:42,806 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 [2025-01-09 22:28:43,349 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 [2025-01-09 22:28:43,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:28:43,776 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 22:28:48,236 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-09 22:28:48,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461097064] [2025-01-09 22:28:48,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461097064] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:28:48,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1400586819] [2025-01-09 22:28:48,236 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:28:48,236 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2025-01-09 22:28:48,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/cvc4 [2025-01-09 22:28:48,238 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2025-01-09 22:28:48,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2025-01-09 22:28:48,330 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-01-09 22:28:48,405 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-01-09 22:28:48,405 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:28:48,405 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:28:48,407 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-01-09 22:28:48,409 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:28:48,539 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 [2025-01-09 22:28:48,913 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 [2025-01-09 22:28:49,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:28:49,137 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 22:28:49,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1400586819] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:28:49,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 22:28:49,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2025-01-09 22:28:49,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185758956] [2025-01-09 22:28:49,358 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 22:28:49,358 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-01-09 22:28:49,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-09 22:28:49,358 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-01-09 22:28:49,359 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=142, Unknown=1, NotChecked=0, Total=182 [2025-01-09 22:28:49,359 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand has 11 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 22:28:50,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:28:50,268 INFO L93 Difference]: Finished difference Result 96 states and 106 transitions. [2025-01-09 22:28:50,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-01-09 22:28:50,269 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2025-01-09 22:28:50,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:28:50,269 INFO L225 Difference]: With dead ends: 96 [2025-01-09 22:28:50,270 INFO L226 Difference]: Without dead ends: 96 [2025-01-09 22:28:50,270 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=58, Invalid=213, Unknown=1, NotChecked=0, Total=272 [2025-01-09 22:28:50,270 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 66 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-01-09 22:28:50,270 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 287 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-01-09 22:28:50,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2025-01-09 22:28:50,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2025-01-09 22:28:50,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 72 states have (on average 1.3055555555555556) internal successors, (94), 83 states have internal predecessors, (94), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2025-01-09 22:28:50,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2025-01-09 22:28:50,274 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 28 [2025-01-09 22:28:50,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:28:50,275 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2025-01-09 22:28:50,275 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 22:28:50,275 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2025-01-09 22:28:50,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-01-09 22:28:50,275 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:28:50,275 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:28:50,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2025-01-09 22:28:50,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2025-01-09 22:28:50,676 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2025-01-09 22:28:50,676 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting f19_undoErr3ASSERT_VIOLATIONMEMORY_FREE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-01-09 22:28:50,677 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:28:50,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1499169021, now seen corresponding path program 1 times [2025-01-09 22:28:50,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-09 22:28:50,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1560697042] [2025-01-09 22:28:50,677 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:28:50,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:28:50,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:28:50,679 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 22:28:50,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-01-09 22:28:50,746 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-01-09 22:28:50,759 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-01-09 22:28:50,760 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:28:50,760 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:28:50,761 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-01-09 22:28:50,762 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:28:50,896 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 [2025-01-09 22:28:50,916 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 [2025-01-09 22:28:51,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-09 22:28:51,075 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 22:28:51,075 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-09 22:28:51,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560697042] [2025-01-09 22:28:51,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560697042] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:28:51,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 22:28:51,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-01-09 22:28:51,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178201648] [2025-01-09 22:28:51,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:28:51,076 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-09 22:28:51,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-09 22:28:51,076 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-09 22:28:51,076 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-01-09 22:28:51,076 INFO L87 Difference]: Start difference. First operand 95 states and 105 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2025-01-09 22:28:51,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:28:51,262 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2025-01-09 22:28:51,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-09 22:28:51,263 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2025-01-09 22:28:51,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:28:51,264 INFO L225 Difference]: With dead ends: 93 [2025-01-09 22:28:51,264 INFO L226 Difference]: Without dead ends: 93 [2025-01-09 22:28:51,264 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-01-09 22:28:51,265 INFO L435 NwaCegarLoop]: 64 mSDtfsCounter, 0 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 22:28:51,265 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 297 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-09 22:28:51,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2025-01-09 22:28:51,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2025-01-09 22:28:51,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 70 states have (on average 1.3) internal successors, (91), 81 states have internal predecessors, (91), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2025-01-09 22:28:51,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2025-01-09 22:28:51,268 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 29 [2025-01-09 22:28:51,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:28:51,269 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2025-01-09 22:28:51,269 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2025-01-09 22:28:51,269 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2025-01-09 22:28:51,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-01-09 22:28:51,269 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:28:51,269 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:28:51,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2025-01-09 22:28:51,470 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:28:51,470 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting f19_undoErr3ASSERT_VIOLATIONMEMORY_FREE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-01-09 22:28:51,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:28:51,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1106142011, now seen corresponding path program 1 times [2025-01-09 22:28:51,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-09 22:28:51,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1964013807] [2025-01-09 22:28:51,471 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:28:51,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:28:51,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:28:51,473 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 22:28:51,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-01-09 22:28:51,540 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-01-09 22:28:51,552 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-01-09 22:28:51,553 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:28:51,553 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:28:51,554 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-01-09 22:28:51,554 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:28:51,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 22:28:51,636 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 22:28:51,636 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-09 22:28:51,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964013807] [2025-01-09 22:28:51,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964013807] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:28:51,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 22:28:51,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-09 22:28:51,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147660560] [2025-01-09 22:28:51,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:28:51,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-09 22:28:51,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-09 22:28:51,637 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-09 22:28:51,637 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-09 22:28:51,637 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-01-09 22:28:51,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:28:51,757 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2025-01-09 22:28:51,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-09 22:28:51,757 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2025-01-09 22:28:51,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:28:51,758 INFO L225 Difference]: With dead ends: 83 [2025-01-09 22:28:51,758 INFO L226 Difference]: Without dead ends: 83 [2025-01-09 22:28:51,759 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-01-09 22:28:51,759 INFO L435 NwaCegarLoop]: 60 mSDtfsCounter, 14 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 22:28:51,759 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 161 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 22:28:51,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2025-01-09 22:28:51,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2025-01-09 22:28:51,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 61 states have (on average 1.2622950819672132) internal successors, (77), 72 states have internal predecessors, (77), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2025-01-09 22:28:51,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2025-01-09 22:28:51,762 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 29 [2025-01-09 22:28:51,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:28:51,762 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2025-01-09 22:28:51,762 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-01-09 22:28:51,762 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2025-01-09 22:28:51,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-01-09 22:28:51,762 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:28:51,763 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:28:51,771 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2025-01-09 22:28:51,963 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:28:51,963 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting f19_undoErr4ASSERT_VIOLATIONMEMORY_FREE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-01-09 22:28:51,964 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:28:51,964 INFO L85 PathProgramCache]: Analyzing trace with hash -2123710263, now seen corresponding path program 1 times [2025-01-09 22:28:51,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-09 22:28:51,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [172194819] [2025-01-09 22:28:51,964 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:28:51,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:28:51,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:28:51,966 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 22:28:51,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2025-01-09 22:28:52,029 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-01-09 22:28:52,042 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-01-09 22:28:52,043 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:28:52,043 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:28:52,044 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-01-09 22:28:52,045 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:28:52,105 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 [2025-01-09 22:28:52,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-01-09 22:28:52,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-01-09 22:28:52,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-09 22:28:52,645 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 22:28:52,645 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-09 22:28:52,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172194819] [2025-01-09 22:28:52,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172194819] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:28:52,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 22:28:52,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-01-09 22:28:52,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412466522] [2025-01-09 22:28:52,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:28:52,645 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-01-09 22:28:52,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-09 22:28:52,645 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-01-09 22:28:52,646 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2025-01-09 22:28:52,646 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand has 9 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 22:28:53,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:28:53,802 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2025-01-09 22:28:53,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-01-09 22:28:53,802 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (3), 2 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 30 [2025-01-09 22:28:53,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:28:53,803 INFO L225 Difference]: With dead ends: 82 [2025-01-09 22:28:53,803 INFO L226 Difference]: Without dead ends: 82 [2025-01-09 22:28:53,803 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2025-01-09 22:28:53,803 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 9 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2025-01-09 22:28:53,803 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 296 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2025-01-09 22:28:53,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2025-01-09 22:28:53,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2025-01-09 22:28:53,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 72 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2025-01-09 22:28:53,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2025-01-09 22:28:53,805 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 30 [2025-01-09 22:28:53,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:28:53,805 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2025-01-09 22:28:53,805 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 22:28:53,805 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2025-01-09 22:28:53,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-01-09 22:28:53,806 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:28:53,806 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:28:53,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2025-01-09 22:28:54,006 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:28:54,006 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-01-09 22:28:54,007 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:28:54,007 INFO L85 PathProgramCache]: Analyzing trace with hash 2042088928, now seen corresponding path program 1 times [2025-01-09 22:28:54,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-09 22:28:54,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1115166434] [2025-01-09 22:28:54,007 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:28:54,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:28:54,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:28:54,009 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 22:28:54,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2025-01-09 22:28:54,074 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-01-09 22:28:54,086 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-01-09 22:28:54,086 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:28:54,086 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:28:54,087 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-01-09 22:28:54,088 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:28:54,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 22:28:54,148 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 22:28:54,148 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-09 22:28:54,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115166434] [2025-01-09 22:28:54,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115166434] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:28:54,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 22:28:54,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-09 22:28:54,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371228078] [2025-01-09 22:28:54,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:28:54,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-09 22:28:54,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-09 22:28:54,149 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-09 22:28:54,149 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-09 22:28:54,149 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-01-09 22:28:54,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:28:54,206 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2025-01-09 22:28:54,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-09 22:28:54,206 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2025-01-09 22:28:54,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:28:54,207 INFO L225 Difference]: With dead ends: 82 [2025-01-09 22:28:54,207 INFO L226 Difference]: Without dead ends: 82 [2025-01-09 22:28:54,207 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-09 22:28:54,207 INFO L435 NwaCegarLoop]: 60 mSDtfsCounter, 0 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 22:28:54,207 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 174 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 22:28:54,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2025-01-09 22:28:54,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2025-01-09 22:28:54,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 72 states have internal predecessors, (75), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2025-01-09 22:28:54,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2025-01-09 22:28:54,210 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 29 [2025-01-09 22:28:54,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:28:54,210 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2025-01-09 22:28:54,210 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-01-09 22:28:54,210 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2025-01-09 22:28:54,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-01-09 22:28:54,211 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:28:54,211 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:28:54,220 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2025-01-09 22:28:54,411 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:28:54,412 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-01-09 22:28:54,412 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:28:54,412 INFO L85 PathProgramCache]: Analyzing trace with hash 2041657022, now seen corresponding path program 1 times [2025-01-09 22:28:54,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-09 22:28:54,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1707675503] [2025-01-09 22:28:54,412 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:28:54,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:28:54,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:28:54,414 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 22:28:54,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2025-01-09 22:28:54,484 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-01-09 22:28:54,504 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-01-09 22:28:54,504 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:28:54,504 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:28:54,505 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-01-09 22:28:54,507 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:28:54,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-01-09 22:28:55,281 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 [2025-01-09 22:28:55,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-01-09 22:28:55,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:28:55,709 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 22:29:00,238 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-09 22:29:00,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707675503] [2025-01-09 22:29:00,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707675503] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:29:00,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [383552956] [2025-01-09 22:29:00,239 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:29:00,239 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2025-01-09 22:29:00,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/cvc4 [2025-01-09 22:29:00,240 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2025-01-09 22:29:00,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2025-01-09 22:29:00,334 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-01-09 22:29:00,392 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-01-09 22:29:00,392 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:29:00,392 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:29:00,394 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-01-09 22:29:00,395 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:29:00,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-01-09 22:29:00,874 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 [2025-01-09 22:29:01,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-01-09 22:29:01,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:29:01,096 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 22:29:05,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [383552956] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:29:05,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 22:29:05,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2025-01-09 22:29:05,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592737341] [2025-01-09 22:29:05,477 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 22:29:05,477 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-01-09 22:29:05,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-09 22:29:05,477 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-01-09 22:29:05,478 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=142, Unknown=1, NotChecked=0, Total=182 [2025-01-09 22:29:05,478 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 22:29:06,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:29:06,750 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2025-01-09 22:29:06,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-01-09 22:29:06,751 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2025-01-09 22:29:06,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:29:06,751 INFO L225 Difference]: With dead ends: 82 [2025-01-09 22:29:06,751 INFO L226 Difference]: Without dead ends: 82 [2025-01-09 22:29:06,751 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 68 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=58, Invalid=213, Unknown=1, NotChecked=0, Total=272 [2025-01-09 22:29:06,752 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 48 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2025-01-09 22:29:06,752 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 228 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2025-01-09 22:29:06,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2025-01-09 22:29:06,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2025-01-09 22:29:06,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 71 states have internal predecessors, (74), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2025-01-09 22:29:06,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2025-01-09 22:29:06,754 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 29 [2025-01-09 22:29:06,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:29:06,754 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2025-01-09 22:29:06,754 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 22:29:06,754 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2025-01-09 22:29:06,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-01-09 22:29:06,755 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:29:06,755 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:29:06,762 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2025-01-09 22:29:06,958 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 0 [2025-01-09 22:29:07,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2025-01-09 22:29:07,155 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-01-09 22:29:07,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:29:07,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1133141641, now seen corresponding path program 1 times [2025-01-09 22:29:07,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-09 22:29:07,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1431738114] [2025-01-09 22:29:07,156 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:29:07,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:29:07,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:29:07,158 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 22:29:07,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2025-01-09 22:29:07,228 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-01-09 22:29:07,242 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-01-09 22:29:07,242 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:29:07,242 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:29:07,243 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-01-09 22:29:07,254 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:29:07,325 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 [2025-01-09 22:29:07,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-01-09 22:29:07,756 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 11 treesize of output 5 [2025-01-09 22:29:07,839 WARN L873 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (store |c_old(#valid)| |ldv_malloc_#res.base| (select |c_#valid| |ldv_malloc_#res.base|)) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2025-01-09 22:29:07,986 INFO L349 Elim1Store]: treesize reduction 36, result has 35.7 percent of original size [2025-01-09 22:29:07,986 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 25 treesize of output 28 [2025-01-09 22:29:08,022 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 27 treesize of output 15 [2025-01-09 22:29:08,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-01-09 22:29:08,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2025-01-09 22:29:08,442 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 22:29:21,231 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-09 22:29:21,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431738114] [2025-01-09 22:29:21,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431738114] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:29:21,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1460417382] [2025-01-09 22:29:21,232 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:29:21,232 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2025-01-09 22:29:21,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/cvc4 [2025-01-09 22:29:21,233 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2025-01-09 22:29:21,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2025-01-09 22:29:21,332 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-01-09 22:29:21,382 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-01-09 22:29:21,382 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:29:21,382 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:29:21,383 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-01-09 22:29:21,385 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:29:21,425 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 [2025-01-09 22:29:21,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-01-09 22:29:21,653 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 11 treesize of output 5 [2025-01-09 22:29:21,679 WARN L873 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (= |c_#valid| (store |c_old(#valid)| |ldv_malloc_#res.base| (_ bv1 1)))) is different from true [2025-01-09 22:29:21,764 INFO L349 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2025-01-09 22:29:21,765 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 18 treesize of output 24 [2025-01-09 22:29:21,858 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 27 treesize of output 15 [2025-01-09 22:29:22,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-01-09 22:29:22,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2025-01-09 22:29:22,058 INFO L312 TraceCheckSpWp]: Computing backward predicates...