./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/memleaks_test13_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ldv-memsafety/memleaks_test13_2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 35bea36500fd584379ee75f7219d833c6e835c74616f49a2cc8d9d16168e8f4f --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 22:54:38,543 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 22:54:38,598 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-08 22:54:38,602 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 22:54:38,606 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 22:54:38,629 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 22:54:38,630 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 22:54:38,630 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 22:54:38,631 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 22:54:38,631 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 22:54:38,631 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 22:54:38,632 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 22:54:38,632 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 22:54:38,632 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 22:54:38,632 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 22:54:38,632 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 22:54:38,632 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 22:54:38,632 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 22:54:38,632 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 22:54:38,632 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 22:54:38,633 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-08 22:54:38,633 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-08 22:54:38,633 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-08 22:54:38,633 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 22:54:38,633 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-08 22:54:38,633 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-08 22:54:38,633 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 22:54:38,633 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 22:54:38,633 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 22:54:38,633 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 22:54:38,633 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 22:54:38,633 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 22:54:38,633 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 22:54:38,634 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 22:54:38,634 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 22:54:38,634 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 22:54:38,634 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 22:54:38,634 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 22:54:38,634 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 22:54:38,634 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 22:54:38,634 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 22:54:38,634 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 22:54:38,634 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 35bea36500fd584379ee75f7219d833c6e835c74616f49a2cc8d9d16168e8f4f [2025-03-08 22:54:38,879 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 22:54:38,887 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 22:54:38,889 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 22:54:38,890 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 22:54:38,890 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 22:54:38,891 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test13_2.i [2025-03-08 22:54:39,976 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64aa42cdf/4e477ca0c34f4147a713944c46eb2927/FLAGdf8e79c78 [2025-03-08 22:54:40,231 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 22:54:40,231 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test13_2.i [2025-03-08 22:54:40,242 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64aa42cdf/4e477ca0c34f4147a713944c46eb2927/FLAGdf8e79c78 [2025-03-08 22:54:40,535 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64aa42cdf/4e477ca0c34f4147a713944c46eb2927 [2025-03-08 22:54:40,537 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 22:54:40,537 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 22:54:40,538 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 22:54:40,538 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 22:54:40,542 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 22:54:40,542 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 10:54:40" (1/1) ... [2025-03-08 22:54:40,543 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bb1082c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:54:40, skipping insertion in model container [2025-03-08 22:54:40,543 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 10:54:40" (1/1) ... [2025-03-08 22:54:40,570 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 22:54:40,774 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-08 22:54:40,812 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-08 22:54:40,817 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 22:54:40,830 ERROR L321 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2025-03-08 22:54:40,830 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@370fa0fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:54:40, skipping insertion in model container [2025-03-08 22:54:40,830 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 22:54:40,831 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2025-03-08 22:54:40,832 INFO L158 Benchmark]: Toolchain (without parser) took 293.69ms. Allocated memory is still 142.6MB. Free memory was 111.0MB in the beginning and 97.5MB in the end (delta: 13.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-03-08 22:54:40,832 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 226.5MB. Free memory is still 148.6MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-08 22:54:40,832 INFO L158 Benchmark]: CACSL2BoogieTranslator took 292.23ms. Allocated memory is still 142.6MB. Free memory was 111.0MB in the beginning and 97.5MB in the end (delta: 13.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-03-08 22:54:40,833 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 226.5MB. Free memory is still 148.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 292.23ms. Allocated memory is still 142.6MB. Free memory was 111.0MB in the beginning and 97.5MB in the end (delta: 13.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 607]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ldv-memsafety/memleaks_test13_2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 35bea36500fd584379ee75f7219d833c6e835c74616f49a2cc8d9d16168e8f4f --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 22:54:42,373 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 22:54:42,467 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2025-03-08 22:54:42,471 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 22:54:42,471 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 22:54:42,484 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 22:54:42,485 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 22:54:42,485 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 22:54:42,485 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 22:54:42,485 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 22:54:42,485 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 22:54:42,485 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 22:54:42,485 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 22:54:42,486 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 22:54:42,486 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 22:54:42,486 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 22:54:42,486 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 22:54:42,486 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 22:54:42,486 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 22:54:42,486 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 22:54:42,486 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-08 22:54:42,486 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-08 22:54:42,486 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-08 22:54:42,487 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 22:54:42,487 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-08 22:54:42,487 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2025-03-08 22:54:42,487 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2025-03-08 22:54:42,487 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-08 22:54:42,487 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 22:54:42,487 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 22:54:42,487 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 22:54:42,487 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 22:54:42,487 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 22:54:42,487 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 22:54:42,487 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 22:54:42,487 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 22:54:42,488 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 22:54:42,488 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 22:54:42,488 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2025-03-08 22:54:42,488 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2025-03-08 22:54:42,488 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 22:54:42,488 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 22:54:42,488 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 22:54:42,488 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 22:54:42,488 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 35bea36500fd584379ee75f7219d833c6e835c74616f49a2cc8d9d16168e8f4f [2025-03-08 22:54:42,714 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 22:54:42,719 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 22:54:42,721 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 22:54:42,722 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 22:54:42,722 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 22:54:42,723 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test13_2.i [2025-03-08 22:54:43,841 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/982a3cfbb/458b6e5154b64ee7b51de7b9802d94e6/FLAG3c9db8ed1 [2025-03-08 22:54:44,112 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 22:54:44,113 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test13_2.i [2025-03-08 22:54:44,126 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/982a3cfbb/458b6e5154b64ee7b51de7b9802d94e6/FLAG3c9db8ed1 [2025-03-08 22:54:44,140 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/982a3cfbb/458b6e5154b64ee7b51de7b9802d94e6 [2025-03-08 22:54:44,141 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 22:54:44,143 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 22:54:44,144 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 22:54:44,144 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 22:54:44,148 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 22:54:44,148 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 10:54:44" (1/1) ... [2025-03-08 22:54:44,149 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bedf8da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:54:44, skipping insertion in model container [2025-03-08 22:54:44,149 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 10:54:44" (1/1) ... [2025-03-08 22:54:44,178 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 22:54:44,364 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-08 22:54:44,393 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-08 22:54:44,399 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 22:54:44,417 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2025-03-08 22:54:44,422 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 22:54:44,442 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-08 22:54:44,465 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-08 22:54:44,469 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 22:54:44,477 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 22:54:44,513 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 22:54:44,541 INFO L204 MainTranslator]: Completed translation [2025-03-08 22:54:44,541 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:54:44 WrapperNode [2025-03-08 22:54:44,542 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 22:54:44,542 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 22:54:44,542 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 22:54:44,542 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 22:54:44,546 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:54:44" (1/1) ... [2025-03-08 22:54:44,559 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:54:44" (1/1) ... [2025-03-08 22:54:44,573 INFO L138 Inliner]: procedures = 167, calls = 79, calls flagged for inlining = 21, calls inlined = 6, statements flattened = 58 [2025-03-08 22:54:44,574 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 22:54:44,574 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 22:54:44,574 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 22:54:44,574 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 22:54:44,580 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:54:44" (1/1) ... [2025-03-08 22:54:44,580 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:54:44" (1/1) ... [2025-03-08 22:54:44,582 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:54:44" (1/1) ... [2025-03-08 22:54:44,604 INFO L175 MemorySlicer]: Split 18 memory accesses to 2 slices as follows [2, 16]. 89 percent of accesses are in the largest equivalence class. The 4 initializations are split as follows [2, 2]. The 8 writes are split as follows [0, 8]. [2025-03-08 22:54:44,604 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:54:44" (1/1) ... [2025-03-08 22:54:44,605 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:54:44" (1/1) ... [2025-03-08 22:54:44,615 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:54:44" (1/1) ... [2025-03-08 22:54:44,615 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:54:44" (1/1) ... [2025-03-08 22:54:44,620 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:54:44" (1/1) ... [2025-03-08 22:54:44,621 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:54:44" (1/1) ... [2025-03-08 22:54:44,623 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 22:54:44,623 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 22:54:44,623 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 22:54:44,623 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 22:54:44,627 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:54:44" (1/1) ... [2025-03-08 22:54:44,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 22:54:44,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:54:44,652 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-08 22:54:44,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-08 22:54:44,672 INFO L130 BoogieDeclarations]: Found specification of procedure LDV_INIT_LIST_HEAD [2025-03-08 22:54:44,672 INFO L138 BoogieDeclarations]: Found implementation of procedure LDV_INIT_LIST_HEAD [2025-03-08 22:54:44,672 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_list_add [2025-03-08 22:54:44,672 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_list_add [2025-03-08 22:54:44,672 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2025-03-08 22:54:44,672 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2025-03-08 22:54:44,672 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_list_add [2025-03-08 22:54:44,672 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_list_add [2025-03-08 22:54:44,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-08 22:54:44,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 22:54:44,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-03-08 22:54:44,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2025-03-08 22:54:44,672 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-03-08 22:54:44,672 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2025-03-08 22:54:44,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2025-03-08 22:54:44,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2025-03-08 22:54:44,673 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_list_del [2025-03-08 22:54:44,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_list_del [2025-03-08 22:54:44,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 22:54:44,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 22:54:44,789 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 22:54:44,791 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 22:54:44,990 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L527: havoc #t~malloc12.base, #t~malloc12.offset; [2025-03-08 22:54:45,081 INFO L? ?]: Removed 72 outVars from TransFormulas that were not future-live. [2025-03-08 22:54:45,081 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 22:54:45,090 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 22:54:45,090 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 22:54:45,090 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 10:54:45 BoogieIcfgContainer [2025-03-08 22:54:45,090 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 22:54:45,092 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 22:54:45,092 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 22:54:45,095 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 22:54:45,095 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 10:54:44" (1/3) ... [2025-03-08 22:54:45,096 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41ed8636 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 10:54:45, skipping insertion in model container [2025-03-08 22:54:45,096 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:54:44" (2/3) ... [2025-03-08 22:54:45,096 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41ed8636 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 10:54:45, skipping insertion in model container [2025-03-08 22:54:45,097 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 10:54:45" (3/3) ... [2025-03-08 22:54:45,097 INFO L128 eAbstractionObserver]: Analyzing ICFG memleaks_test13_2.i [2025-03-08 22:54:45,106 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 22:54:45,107 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG memleaks_test13_2.i that has 6 procedures, 82 locations, 1 initial locations, 1 loop locations, and 29 error locations. [2025-03-08 22:54:45,135 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 22:54:45,142 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;@7d8959eb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 22:54:45,142 INFO L334 AbstractCegarLoop]: Starting to check reachability of 29 error locations. [2025-03-08 22:54:45,145 INFO L276 IsEmpty]: Start isEmpty. Operand has 82 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 72 states have internal predecessors, (74), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-08 22:54:45,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-03-08 22:54:45,148 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:54:45,148 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:54:45,149 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2025-03-08 22:54:45,151 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:54:45,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1009446008, now seen corresponding path program 1 times [2025-03-08 22:54:45,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:54:45,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [201149441] [2025-03-08 22:54:45,158 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:54:45,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:45,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:54:45,160 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:54:45,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 22:54:45,221 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-08 22:54:45,232 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-08 22:54:45,232 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:54:45,232 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:54:45,235 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-08 22:54:45,238 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:54:45,464 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2025-03-08 22:54:45,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2025-03-08 22:54:45,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:54:45,522 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:54:45,522 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:54:45,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201149441] [2025-03-08 22:54:45,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201149441] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:54:45,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:54:45,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 22:54:45,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630223279] [2025-03-08 22:54:45,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:54:45,526 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-08 22:54:45,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:54:45,540 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-08 22:54:45,540 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-03-08 22:54:45,541 INFO L87 Difference]: Start difference. First operand has 82 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 72 states have internal predecessors, (74), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:54:45,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:54:45,957 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2025-03-08 22:54:45,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 22:54:45,959 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2025-03-08 22:54:45,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:54:45,964 INFO L225 Difference]: With dead ends: 82 [2025-03-08 22:54:45,964 INFO L226 Difference]: Without dead ends: 80 [2025-03-08 22:54:45,966 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2025-03-08 22:54:45,968 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 125 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 22:54:45,969 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 86 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 22:54:45,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2025-03-08 22:54:45,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2025-03-08 22:54:45,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 41 states have (on average 1.7073170731707317) internal successors, (70), 68 states have internal predecessors, (70), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-08 22:54:45,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2025-03-08 22:54:45,991 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 12 [2025-03-08 22:54:45,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:54:45,991 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2025-03-08 22:54:45,992 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:54:45,992 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2025-03-08 22:54:45,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-03-08 22:54:45,992 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:54:45,992 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:54:45,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-08 22:54:46,196 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:46,196 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2025-03-08 22:54:46,197 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:54:46,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1009446009, now seen corresponding path program 1 times [2025-03-08 22:54:46,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:54:46,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [953961323] [2025-03-08 22:54:46,197 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:54:46,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:46,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:54:46,200 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:54:46,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 22:54:46,244 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-08 22:54:46,256 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-08 22:54:46,256 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:54:46,257 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:54:46,258 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-08 22:54:46,259 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:54:46,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 22:54:46,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-03-08 22:54:46,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:54:46,475 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:54:46,475 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:54:46,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953961323] [2025-03-08 22:54:46,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953961323] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:54:46,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:54:46,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-08 22:54:46,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177343927] [2025-03-08 22:54:46,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:54:46,477 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-08 22:54:46,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:54:46,477 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-08 22:54:46,478 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2025-03-08 22:54:46,478 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:54:46,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:54:46,937 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2025-03-08 22:54:46,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 22:54:46,939 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2025-03-08 22:54:46,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:54:46,939 INFO L225 Difference]: With dead ends: 78 [2025-03-08 22:54:46,939 INFO L226 Difference]: Without dead ends: 78 [2025-03-08 22:54:46,939 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2025-03-08 22:54:46,940 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 121 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 22:54:46,941 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 71 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 22:54:46,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2025-03-08 22:54:46,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2025-03-08 22:54:46,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 41 states have (on average 1.6585365853658536) internal successors, (68), 66 states have internal predecessors, (68), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-08 22:54:46,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2025-03-08 22:54:46,946 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 12 [2025-03-08 22:54:46,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:54:46,946 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2025-03-08 22:54:46,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:54:46,948 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2025-03-08 22:54:46,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-03-08 22:54:46,949 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:54:46,950 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:54:46,956 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-08 22:54:47,150 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:47,150 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __ldv_list_addErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2025-03-08 22:54:47,151 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:54:47,151 INFO L85 PathProgramCache]: Analyzing trace with hash -954933801, now seen corresponding path program 1 times [2025-03-08 22:54:47,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:54:47,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [383085935] [2025-03-08 22:54:47,151 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:54:47,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:47,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:54:47,153 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:54:47,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 22:54:47,192 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-08 22:54:47,201 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 22:54:47,201 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:54:47,201 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:54:47,202 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-08 22:54:47,203 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:54:47,243 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 [2025-03-08 22:54:47,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:54:47,274 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:54:47,274 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:54:47,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383085935] [2025-03-08 22:54:47,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383085935] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:54:47,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:54:47,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-08 22:54:47,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370859205] [2025-03-08 22:54:47,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:54:47,274 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-08 22:54:47,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:54:47,275 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-08 22:54:47,275 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2025-03-08 22:54:47,275 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:54:47,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:54:47,617 INFO L93 Difference]: Finished difference Result 109 states and 112 transitions. [2025-03-08 22:54:47,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-08 22:54:47,619 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2025-03-08 22:54:47,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:54:47,620 INFO L225 Difference]: With dead ends: 109 [2025-03-08 22:54:47,620 INFO L226 Difference]: Without dead ends: 109 [2025-03-08 22:54:47,620 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2025-03-08 22:54:47,620 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 57 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 22:54:47,620 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 293 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 22:54:47,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2025-03-08 22:54:47,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 75. [2025-03-08 22:54:47,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 41 states have (on average 1.6341463414634145) internal successors, (67), 65 states have internal predecessors, (67), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-08 22:54:47,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2025-03-08 22:54:47,629 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 15 [2025-03-08 22:54:47,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:54:47,630 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2025-03-08 22:54:47,630 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:54:47,630 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2025-03-08 22:54:47,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-03-08 22:54:47,630 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:54:47,630 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:54:47,636 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-08 22:54:47,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:47,831 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __ldv_list_addErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2025-03-08 22:54:47,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:54:47,831 INFO L85 PathProgramCache]: Analyzing trace with hash -954933800, now seen corresponding path program 1 times [2025-03-08 22:54:47,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:54:47,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1081689986] [2025-03-08 22:54:47,832 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:54:47,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:47,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:54:47,834 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:54:47,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-08 22:54:47,873 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-08 22:54:47,884 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 22:54:47,884 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:54:47,884 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:54:47,886 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-08 22:54:47,888 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:54:48,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 22:54:48,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-03-08 22:54:48,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:54:48,264 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:54:48,264 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:54:48,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081689986] [2025-03-08 22:54:48,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081689986] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:54:48,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:54:48,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-08 22:54:48,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128511621] [2025-03-08 22:54:48,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:54:48,265 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-08 22:54:48,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:54:48,265 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-08 22:54:48,266 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2025-03-08 22:54:48,266 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand has 11 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:54:49,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:54:49,113 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2025-03-08 22:54:49,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-08 22:54:49,114 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2025-03-08 22:54:49,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:54:49,115 INFO L225 Difference]: With dead ends: 105 [2025-03-08 22:54:49,115 INFO L226 Difference]: Without dead ends: 105 [2025-03-08 22:54:49,115 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2025-03-08 22:54:49,115 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 122 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-08 22:54:49,116 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 206 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-08 22:54:49,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2025-03-08 22:54:49,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2025-03-08 22:54:49,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 41 states have (on average 1.6097560975609757) internal successors, (66), 64 states have internal predecessors, (66), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-08 22:54:49,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2025-03-08 22:54:49,120 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 15 [2025-03-08 22:54:49,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:54:49,120 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2025-03-08 22:54:49,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:54:49,120 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2025-03-08 22:54:49,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2025-03-08 22:54:49,121 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:54:49,121 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:54:49,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-08 22:54:49,322 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:49,323 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2025-03-08 22:54:49,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:54:49,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1228594424, now seen corresponding path program 1 times [2025-03-08 22:54:49,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:54:49,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1927696794] [2025-03-08 22:54:49,323 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:54:49,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:49,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:54:49,325 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:54:49,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-08 22:54:49,366 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-08 22:54:49,372 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-08 22:54:49,373 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:54:49,373 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:54:49,373 INFO L256 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-08 22:54:49,374 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:54:49,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:54:49,392 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:54:49,392 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:54:49,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927696794] [2025-03-08 22:54:49,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927696794] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:54:49,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:54:49,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 22:54:49,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299563725] [2025-03-08 22:54:49,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:54:49,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 22:54:49,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:54:49,392 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 22:54:49,392 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 22:54:49,393 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:54:49,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:54:49,409 INFO L93 Difference]: Finished difference Result 80 states and 83 transitions. [2025-03-08 22:54:49,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 22:54:49,409 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2025-03-08 22:54:49,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:54:49,411 INFO L225 Difference]: With dead ends: 80 [2025-03-08 22:54:49,411 INFO L226 Difference]: Without dead ends: 80 [2025-03-08 22:54:49,411 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 22:54:49,411 INFO L435 NwaCegarLoop]: 75 mSDtfsCounter, 1 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 22:54:49,411 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 291 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 22:54:49,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2025-03-08 22:54:49,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2025-03-08 22:54:49,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 44 states have (on average 1.5681818181818181) internal successors, (69), 67 states have internal predecessors, (69), 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) [2025-03-08 22:54:49,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2025-03-08 22:54:49,415 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 13 [2025-03-08 22:54:49,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:54:49,415 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2025-03-08 22:54:49,415 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:54:49,415 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2025-03-08 22:54:49,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2025-03-08 22:54:49,416 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:54:49,416 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:54:49,422 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-08 22:54:49,620 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:49,620 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2025-03-08 22:54:49,620 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:54:49,620 INFO L85 PathProgramCache]: Analyzing trace with hash -578860039, now seen corresponding path program 1 times [2025-03-08 22:54:49,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:54:49,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [786278245] [2025-03-08 22:54:49,621 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:54:49,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:49,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:54:49,622 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:54:49,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-08 22:54:49,656 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-08 22:54:49,662 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-08 22:54:49,662 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:54:49,662 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:54:49,663 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-08 22:54:49,664 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:54:49,688 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 [2025-03-08 22:54:49,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:54:49,700 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:54:49,700 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:54:49,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786278245] [2025-03-08 22:54:49,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786278245] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:54:49,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:54:49,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 22:54:49,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753779599] [2025-03-08 22:54:49,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:54:49,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 22:54:49,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:54:49,701 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 22:54:49,701 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 22:54:49,701 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:54:49,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:54:49,864 INFO L93 Difference]: Finished difference Result 114 states and 119 transitions. [2025-03-08 22:54:49,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 22:54:49,865 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2025-03-08 22:54:49,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:54:49,866 INFO L225 Difference]: With dead ends: 114 [2025-03-08 22:54:49,866 INFO L226 Difference]: Without dead ends: 114 [2025-03-08 22:54:49,866 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2025-03-08 22:54:49,866 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 40 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 22:54:49,866 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 174 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 22:54:49,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2025-03-08 22:54:49,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 82. [2025-03-08 22:54:49,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 48 states have (on average 1.5416666666666667) internal successors, (74), 70 states have internal predecessors, (74), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2025-03-08 22:54:49,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2025-03-08 22:54:49,870 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 13 [2025-03-08 22:54:49,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:54:49,870 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2025-03-08 22:54:49,870 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:54:49,870 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2025-03-08 22:54:49,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2025-03-08 22:54:49,870 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:54:49,870 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:54:49,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-08 22:54:50,070 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:50,071 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2025-03-08 22:54:50,071 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:54:50,071 INFO L85 PathProgramCache]: Analyzing trace with hash -578860038, now seen corresponding path program 1 times [2025-03-08 22:54:50,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:54:50,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [904667129] [2025-03-08 22:54:50,071 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:54:50,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:50,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:54:50,073 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:54:50,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-08 22:54:50,106 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-08 22:54:50,112 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-08 22:54:50,112 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:54:50,112 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:54:50,113 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 22:54:50,114 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:54:50,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:54:50,253 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:54:50,253 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:54:50,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904667129] [2025-03-08 22:54:50,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904667129] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:54:50,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:54:50,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 22:54:50,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347994447] [2025-03-08 22:54:50,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:54:50,254 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 22:54:50,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:54:50,254 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 22:54:50,254 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-08 22:54:50,254 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:54:50,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:54:50,547 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2025-03-08 22:54:50,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 22:54:50,547 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2025-03-08 22:54:50,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:54:50,548 INFO L225 Difference]: With dead ends: 99 [2025-03-08 22:54:50,548 INFO L226 Difference]: Without dead ends: 99 [2025-03-08 22:54:50,548 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2025-03-08 22:54:50,549 INFO L435 NwaCegarLoop]: 69 mSDtfsCounter, 31 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 22:54:50,549 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 202 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 22:54:50,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2025-03-08 22:54:50,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 84. [2025-03-08 22:54:50,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 50 states have (on average 1.5) internal successors, (75), 72 states have internal predecessors, (75), 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) [2025-03-08 22:54:50,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2025-03-08 22:54:50,556 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 13 [2025-03-08 22:54:50,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:54:50,556 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2025-03-08 22:54:50,556 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:54:50,556 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2025-03-08 22:54:50,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-03-08 22:54:50,558 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:54:50,558 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:54:50,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-08 22:54:50,759 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:50,759 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __ldv_list_addErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2025-03-08 22:54:50,759 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:54:50,759 INFO L85 PathProgramCache]: Analyzing trace with hash 461823248, now seen corresponding path program 1 times [2025-03-08 22:54:50,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:54:50,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1578932405] [2025-03-08 22:54:50,759 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:54:50,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:50,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:54:50,761 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:54:50,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-08 22:54:50,801 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-08 22:54:50,811 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-08 22:54:50,811 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:54:50,811 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:54:50,812 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-08 22:54:50,813 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:54:50,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2025-03-08 22:54:50,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:54:50,872 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:54:50,872 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:54:50,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578932405] [2025-03-08 22:54:50,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578932405] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:54:50,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:54:50,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-08 22:54:50,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916187136] [2025-03-08 22:54:50,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:54:50,873 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-08 22:54:50,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:54:50,873 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-08 22:54:50,873 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2025-03-08 22:54:50,873 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:54:51,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:54:51,121 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2025-03-08 22:54:51,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 22:54:51,122 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2025-03-08 22:54:51,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:54:51,123 INFO L225 Difference]: With dead ends: 102 [2025-03-08 22:54:51,123 INFO L226 Difference]: Without dead ends: 102 [2025-03-08 22:54:51,123 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2025-03-08 22:54:51,123 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 23 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 22:54:51,123 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 319 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 22:54:51,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2025-03-08 22:54:51,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 97. [2025-03-08 22:54:51,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 60 states have (on average 1.4666666666666666) internal successors, (88), 82 states have internal predecessors, (88), 7 states have call successors, (7), 7 states have call predecessors, (7), 8 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2025-03-08 22:54:51,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 103 transitions. [2025-03-08 22:54:51,130 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 103 transitions. Word has length 16 [2025-03-08 22:54:51,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:54:51,130 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 103 transitions. [2025-03-08 22:54:51,130 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:54:51,130 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 103 transitions. [2025-03-08 22:54:51,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-03-08 22:54:51,130 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:54:51,130 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:54:51,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-08 22:54:51,331 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:51,331 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __ldv_list_addErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2025-03-08 22:54:51,331 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:54:51,331 INFO L85 PathProgramCache]: Analyzing trace with hash 461823249, now seen corresponding path program 1 times [2025-03-08 22:54:51,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:54:51,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1360209475] [2025-03-08 22:54:51,332 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:54:51,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:51,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:54:51,333 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:54:51,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-08 22:54:51,366 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-08 22:54:51,377 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-08 22:54:51,377 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:54:51,377 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:54:51,378 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-08 22:54:51,379 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:54:51,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-08 22:54:51,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:54:51,484 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:54:51,484 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:54:51,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360209475] [2025-03-08 22:54:51,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360209475] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:54:51,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:54:51,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-08 22:54:51,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660674290] [2025-03-08 22:54:51,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:54:51,484 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-08 22:54:51,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:54:51,485 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-08 22:54:51,485 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2025-03-08 22:54:51,485 INFO L87 Difference]: Start difference. First operand 97 states and 103 transitions. Second operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:54:51,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:54:51,787 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2025-03-08 22:54:51,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 22:54:51,787 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2025-03-08 22:54:51,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:54:51,788 INFO L225 Difference]: With dead ends: 100 [2025-03-08 22:54:51,788 INFO L226 Difference]: Without dead ends: 100 [2025-03-08 22:54:51,788 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2025-03-08 22:54:51,788 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 20 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 22:54:51,788 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 400 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 22:54:51,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2025-03-08 22:54:51,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2025-03-08 22:54:51,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 60 states have (on average 1.4333333333333333) internal successors, (86), 82 states have internal predecessors, (86), 7 states have call successors, (7), 7 states have call predecessors, (7), 8 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2025-03-08 22:54:51,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2025-03-08 22:54:51,791 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 16 [2025-03-08 22:54:51,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:54:51,791 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2025-03-08 22:54:51,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:54:51,791 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2025-03-08 22:54:51,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-03-08 22:54:51,791 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:54:51,791 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:54:51,798 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-08 22:54:51,992 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:51,992 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __ldv_list_addErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2025-03-08 22:54:51,992 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:54:51,993 INFO L85 PathProgramCache]: Analyzing trace with hash 590905967, now seen corresponding path program 1 times [2025-03-08 22:54:51,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:54:51,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1619657961] [2025-03-08 22:54:51,993 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:54:51,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:51,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:54:52,010 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:54:52,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-08 22:54:52,047 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-08 22:54:52,057 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-08 22:54:52,058 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:54:52,058 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:54:52,059 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-08 22:54:52,059 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:54:52,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:54:52,090 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:54:52,090 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:54:52,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619657961] [2025-03-08 22:54:52,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619657961] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:54:52,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:54:52,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 22:54:52,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704083858] [2025-03-08 22:54:52,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:54:52,091 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 22:54:52,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:54:52,091 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 22:54:52,091 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 22:54:52,091 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:54:52,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:54:52,103 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2025-03-08 22:54:52,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 22:54:52,103 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2025-03-08 22:54:52,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:54:52,104 INFO L225 Difference]: With dead ends: 80 [2025-03-08 22:54:52,104 INFO L226 Difference]: Without dead ends: 80 [2025-03-08 22:54:52,104 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 22:54:52,104 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 0 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 22:54:52,104 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 281 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 22:54:52,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2025-03-08 22:54:52,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2025-03-08 22:54:52,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 50 states have (on average 1.4) internal successors, (70), 68 states have internal predecessors, (70), 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) [2025-03-08 22:54:52,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2025-03-08 22:54:52,107 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 16 [2025-03-08 22:54:52,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:54:52,107 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2025-03-08 22:54:52,107 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:54:52,107 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2025-03-08 22:54:52,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-03-08 22:54:52,107 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:54:52,107 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:54:52,114 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-08 22:54:52,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:52,308 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2025-03-08 22:54:52,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:54:52,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1430509965, now seen corresponding path program 1 times [2025-03-08 22:54:52,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:54:52,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [168119580] [2025-03-08 22:54:52,309 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:54:52,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:52,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:54:52,311 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:54:52,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-08 22:54:52,347 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-08 22:54:52,359 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 22:54:52,359 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:54:52,359 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:54:52,360 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-08 22:54:52,361 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:54:52,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:54:52,386 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:54:52,386 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:54:52,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168119580] [2025-03-08 22:54:52,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168119580] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:54:52,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:54:52,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 22:54:52,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654548427] [2025-03-08 22:54:52,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:54:52,386 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 22:54:52,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:54:52,387 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 22:54:52,387 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 22:54:52,387 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand has 5 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:54:52,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:54:52,500 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2025-03-08 22:54:52,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 22:54:52,500 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2025-03-08 22:54:52,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:54:52,500 INFO L225 Difference]: With dead ends: 79 [2025-03-08 22:54:52,500 INFO L226 Difference]: Without dead ends: 79 [2025-03-08 22:54:52,501 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-08 22:54:52,501 INFO L435 NwaCegarLoop]: 64 mSDtfsCounter, 9 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 22:54:52,501 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 180 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 22:54:52,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2025-03-08 22:54:52,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2025-03-08 22:54:52,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 50 states have (on average 1.38) internal successors, (69), 67 states have internal predecessors, (69), 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) [2025-03-08 22:54:52,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2025-03-08 22:54:52,504 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 18 [2025-03-08 22:54:52,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:54:52,504 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2025-03-08 22:54:52,504 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:54:52,504 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2025-03-08 22:54:52,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-03-08 22:54:52,504 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:54:52,505 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:54:52,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-08 22:54:52,705 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:52,705 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2025-03-08 22:54:52,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:54:52,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1430509966, now seen corresponding path program 1 times [2025-03-08 22:54:52,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:54:52,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [727687222] [2025-03-08 22:54:52,706 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:54:52,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:52,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:54:52,708 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:54:52,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-08 22:54:52,753 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-08 22:54:52,767 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 22:54:52,767 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:54:52,767 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:54:52,769 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-08 22:54:52,770 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:54:52,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2025-03-08 22:54:52,875 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 [2025-03-08 22:54:52,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:54:52,941 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:54:52,941 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:54:52,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727687222] [2025-03-08 22:54:52,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727687222] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:54:52,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:54:52,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-08 22:54:52,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082796874] [2025-03-08 22:54:52,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:54:52,941 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-08 22:54:52,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:54:52,941 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-08 22:54:52,941 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2025-03-08 22:54:52,942 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 9 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:54:53,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:54:53,273 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2025-03-08 22:54:53,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-08 22:54:53,274 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2025-03-08 22:54:53,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:54:53,274 INFO L225 Difference]: With dead ends: 87 [2025-03-08 22:54:53,274 INFO L226 Difference]: Without dead ends: 87 [2025-03-08 22:54:53,274 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2025-03-08 22:54:53,275 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 29 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 22:54:53,275 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 386 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 22:54:53,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2025-03-08 22:54:53,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 78. [2025-03-08 22:54:53,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 50 states have (on average 1.36) internal successors, (68), 66 states have internal predecessors, (68), 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) [2025-03-08 22:54:53,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2025-03-08 22:54:53,277 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 18 [2025-03-08 22:54:53,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:54:53,277 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2025-03-08 22:54:53,277 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:54:53,277 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2025-03-08 22:54:53,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-03-08 22:54:53,277 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:54:53,277 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:54:53,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-08 22:54:53,478 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:53,478 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2025-03-08 22:54:53,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:54:53,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1549192239, now seen corresponding path program 1 times [2025-03-08 22:54:53,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:54:53,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [965204103] [2025-03-08 22:54:53,478 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:54:53,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:53,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:54:53,480 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:54:53,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-08 22:54:53,520 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-08 22:54:53,531 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 22:54:53,531 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:54:53,531 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:54:53,532 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-08 22:54:53,533 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:54:53,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:54:53,558 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:54:53,558 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:54:53,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965204103] [2025-03-08 22:54:53,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965204103] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:54:53,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:54:53,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 22:54:53,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276513085] [2025-03-08 22:54:53,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:54:53,558 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 22:54:53,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:54:53,559 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 22:54:53,559 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 22:54:53,559 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:54:53,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:54:53,670 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2025-03-08 22:54:53,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 22:54:53,671 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2025-03-08 22:54:53,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:54:53,672 INFO L225 Difference]: With dead ends: 76 [2025-03-08 22:54:53,672 INFO L226 Difference]: Without dead ends: 76 [2025-03-08 22:54:53,672 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2025-03-08 22:54:53,673 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 66 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 22:54:53,673 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 95 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 22:54:53,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2025-03-08 22:54:53,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2025-03-08 22:54:53,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 50 states have (on average 1.32) internal successors, (66), 64 states have internal predecessors, (66), 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) [2025-03-08 22:54:53,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2025-03-08 22:54:53,675 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 19 [2025-03-08 22:54:53,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:54:53,675 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2025-03-08 22:54:53,675 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:54:53,675 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2025-03-08 22:54:53,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-03-08 22:54:53,676 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:54:53,676 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:54:53,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-08 22:54:53,881 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:53,881 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2025-03-08 22:54:53,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:54:53,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1549192238, now seen corresponding path program 1 times [2025-03-08 22:54:53,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:54:53,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [731246384] [2025-03-08 22:54:53,882 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:54:53,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:53,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:54:53,883 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:54:53,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-08 22:54:53,919 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-08 22:54:53,927 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 22:54:53,927 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:54:53,927 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:54:53,930 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-08 22:54:53,931 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:54:54,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:54:54,028 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:54:54,029 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:54:54,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731246384] [2025-03-08 22:54:54,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731246384] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:54:54,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:54:54,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 22:54:54,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968546372] [2025-03-08 22:54:54,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:54:54,029 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 22:54:54,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:54:54,029 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 22:54:54,029 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-08 22:54:54,029 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:54:54,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:54:54,198 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2025-03-08 22:54:54,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 22:54:54,199 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2025-03-08 22:54:54,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:54:54,199 INFO L225 Difference]: With dead ends: 86 [2025-03-08 22:54:54,199 INFO L226 Difference]: Without dead ends: 86 [2025-03-08 22:54:54,199 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2025-03-08 22:54:54,200 INFO L435 NwaCegarLoop]: 61 mSDtfsCounter, 20 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 22:54:54,200 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 194 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 22:54:54,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2025-03-08 22:54:54,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2025-03-08 22:54:54,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 55 states have (on average 1.290909090909091) internal successors, (71), 70 states have internal predecessors, (71), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2025-03-08 22:54:54,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2025-03-08 22:54:54,206 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 19 [2025-03-08 22:54:54,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:54:54,206 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2025-03-08 22:54:54,206 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:54:54,206 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2025-03-08 22:54:54,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-03-08 22:54:54,207 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:54:54,207 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:54:54,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-08 22:54:54,407 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:54,407 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2025-03-08 22:54:54,408 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:54:54,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1468469765, now seen corresponding path program 1 times [2025-03-08 22:54:54,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:54:54,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1546871428] [2025-03-08 22:54:54,408 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:54:54,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:54,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:54:54,410 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:54:54,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-08 22:54:54,448 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-08 22:54:54,457 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-08 22:54:54,457 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:54:54,457 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:54:54,459 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-08 22:54:54,459 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:54:54,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:54:54,484 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:54:54,484 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:54:54,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546871428] [2025-03-08 22:54:54,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546871428] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:54:54,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:54:54,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 22:54:54,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337281194] [2025-03-08 22:54:54,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:54:54,484 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 22:54:54,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:54:54,484 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 22:54:54,484 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 22:54:54,484 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-08 22:54:54,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:54:54,579 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2025-03-08 22:54:54,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 22:54:54,579 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2025-03-08 22:54:54,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:54:54,580 INFO L225 Difference]: With dead ends: 85 [2025-03-08 22:54:54,580 INFO L226 Difference]: Without dead ends: 66 [2025-03-08 22:54:54,580 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 22:54:54,580 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 33 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 22:54:54,580 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 68 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 22:54:54,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2025-03-08 22:54:54,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2025-03-08 22:54:54,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 55 states have internal predecessors, (56), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-08 22:54:54,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2025-03-08 22:54:54,582 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 24 [2025-03-08 22:54:54,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:54:54,582 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2025-03-08 22:54:54,582 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-08 22:54:54,582 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2025-03-08 22:54:54,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-03-08 22:54:54,582 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:54:54,582 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:54:54,590 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-08 22:54:54,784 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:54,784 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2025-03-08 22:54:54,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:54:54,785 INFO L85 PathProgramCache]: Analyzing trace with hash 676645179, now seen corresponding path program 1 times [2025-03-08 22:54:54,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:54:54,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [883294380] [2025-03-08 22:54:54,785 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:54:54,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:54,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:54:54,787 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:54:54,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-08 22:54:54,835 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-08 22:54:54,851 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 22:54:54,851 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:54:54,851 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:54:54,852 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-08 22:54:54,853 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:54:54,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2025-03-08 22:54:54,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-08 22:54:55,031 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 [2025-03-08 22:54:55,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:54:55,066 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:54:55,066 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:54:55,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883294380] [2025-03-08 22:54:55,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883294380] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:54:55,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:54:55,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2025-03-08 22:54:55,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890458440] [2025-03-08 22:54:55,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:54:55,067 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-08 22:54:55,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:54:55,067 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-08 22:54:55,067 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2025-03-08 22:54:55,067 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand has 13 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-08 22:54:55,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:54:55,677 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2025-03-08 22:54:55,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-08 22:54:55,678 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2025-03-08 22:54:55,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:54:55,678 INFO L225 Difference]: With dead ends: 91 [2025-03-08 22:54:55,678 INFO L226 Difference]: Without dead ends: 91 [2025-03-08 22:54:55,679 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2025-03-08 22:54:55,679 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 78 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-08 22:54:55,679 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 269 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-08 22:54:55,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2025-03-08 22:54:55,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 65. [2025-03-08 22:54:55,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 54 states have internal predecessors, (55), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-08 22:54:55,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2025-03-08 22:54:55,681 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 27 [2025-03-08 22:54:55,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:54:55,681 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2025-03-08 22:54:55,681 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-08 22:54:55,681 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2025-03-08 22:54:55,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-03-08 22:54:55,682 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:54:55,682 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:54:55,688 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-08 22:54:55,882 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:55,882 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2025-03-08 22:54:55,883 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:54:55,883 INFO L85 PathProgramCache]: Analyzing trace with hash 676645180, now seen corresponding path program 1 times [2025-03-08 22:54:55,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:54:55,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [657067331] [2025-03-08 22:54:55,883 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:54:55,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:55,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:54:55,886 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:54:55,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-08 22:54:55,933 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-08 22:54:55,948 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 22:54:55,948 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:54:55,948 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:54:55,949 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-03-08 22:54:55,951 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:54:55,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-08 22:54:56,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-08 22:54:56,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-08 22:54:56,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2025-03-08 22:54:56,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:54:56,452 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:54:56,452 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:54:56,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657067331] [2025-03-08 22:54:56,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657067331] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:54:56,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:54:56,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2025-03-08 22:54:56,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499690835] [2025-03-08 22:54:56,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:54:56,452 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-08 22:54:56,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:54:56,453 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-08 22:54:56,453 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2025-03-08 22:54:56,453 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand has 15 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-08 22:54:57,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:54:57,213 INFO L93 Difference]: Finished difference Result 83 states and 86 transitions. [2025-03-08 22:54:57,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-08 22:54:57,213 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2025-03-08 22:54:57,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:54:57,214 INFO L225 Difference]: With dead ends: 83 [2025-03-08 22:54:57,214 INFO L226 Difference]: Without dead ends: 83 [2025-03-08 22:54:57,214 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2025-03-08 22:54:57,214 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 65 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-08 22:54:57,214 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 311 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-08 22:54:57,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2025-03-08 22:54:57,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 64. [2025-03-08 22:54:57,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 53 states have internal predecessors, (54), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-08 22:54:57,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2025-03-08 22:54:57,216 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 27 [2025-03-08 22:54:57,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:54:57,216 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2025-03-08 22:54:57,216 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-08 22:54:57,216 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2025-03-08 22:54:57,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-03-08 22:54:57,217 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:54:57,217 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:54:57,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-03-08 22:54:57,417 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:57,418 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_list_delErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2025-03-08 22:54:57,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:54:57,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1355722074, now seen corresponding path program 1 times [2025-03-08 22:54:57,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:54:57,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [374994231] [2025-03-08 22:54:57,418 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:54:57,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:57,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:54:57,420 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:54:57,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-08 22:54:57,464 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-08 22:54:57,481 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-08 22:54:57,481 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:54:57,481 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:54:57,483 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-08 22:54:57,484 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:54:57,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:54:57,501 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:54:57,501 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:54:57,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374994231] [2025-03-08 22:54:57,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374994231] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:54:57,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:54:57,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 22:54:57,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597886981] [2025-03-08 22:54:57,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:54:57,502 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 22:54:57,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:54:57,502 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 22:54:57,502 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 22:54:57,502 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-08 22:54:57,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:54:57,602 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2025-03-08 22:54:57,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 22:54:57,602 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2025-03-08 22:54:57,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:54:57,602 INFO L225 Difference]: With dead ends: 81 [2025-03-08 22:54:57,602 INFO L226 Difference]: Without dead ends: 81 [2025-03-08 22:54:57,603 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-08 22:54:57,603 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 15 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 22:54:57,603 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 150 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 22:54:57,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2025-03-08 22:54:57,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2025-03-08 22:54:57,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 50 states have (on average 1.38) internal successors, (69), 62 states have internal predecessors, (69), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-08 22:54:57,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2025-03-08 22:54:57,605 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 32 [2025-03-08 22:54:57,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:54:57,605 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2025-03-08 22:54:57,605 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-08 22:54:57,605 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2025-03-08 22:54:57,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-03-08 22:54:57,606 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:54:57,606 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:54:57,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-03-08 22:54:57,806 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:57,806 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_list_delErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2025-03-08 22:54:57,806 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:54:57,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1355722075, now seen corresponding path program 1 times [2025-03-08 22:54:57,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:54:57,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1644954490] [2025-03-08 22:54:57,807 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:54:57,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:57,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:54:57,809 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:54:57,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-08 22:54:57,859 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-08 22:54:57,877 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-08 22:54:57,877 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:54:57,877 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:54:57,879 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-03-08 22:54:57,881 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:54:57,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-08 22:54:58,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-08 22:54:58,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-08 22:54:58,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2025-03-08 22:54:58,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:54:58,252 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:54:58,252 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:54:58,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644954490] [2025-03-08 22:54:58,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644954490] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:54:58,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:54:58,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2025-03-08 22:54:58,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722947828] [2025-03-08 22:54:58,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:54:58,257 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-08 22:54:58,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:54:58,257 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-08 22:54:58,257 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2025-03-08 22:54:58,258 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 13 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-08 22:54:59,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:54:59,020 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2025-03-08 22:54:59,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-08 22:54:59,020 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 13 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2025-03-08 22:54:59,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:54:59,021 INFO L225 Difference]: With dead ends: 84 [2025-03-08 22:54:59,021 INFO L226 Difference]: Without dead ends: 84 [2025-03-08 22:54:59,021 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2025-03-08 22:54:59,021 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 84 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-08 22:54:59,022 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 302 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-08 22:54:59,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2025-03-08 22:54:59,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 74. [2025-03-08 22:54:59,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 50 states have (on average 1.34) internal successors, (67), 62 states have internal predecessors, (67), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-08 22:54:59,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 79 transitions. [2025-03-08 22:54:59,024 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 79 transitions. Word has length 32 [2025-03-08 22:54:59,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:54:59,024 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 79 transitions. [2025-03-08 22:54:59,024 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 13 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-08 22:54:59,024 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 79 transitions. [2025-03-08 22:54:59,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-03-08 22:54:59,024 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:54:59,025 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:54:59,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-03-08 22:54:59,225 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:59,226 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2025-03-08 22:54:59,226 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:54:59,226 INFO L85 PathProgramCache]: Analyzing trace with hash -922208364, now seen corresponding path program 1 times [2025-03-08 22:54:59,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:54:59,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [21074837] [2025-03-08 22:54:59,226 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:54:59,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:59,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:54:59,228 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:54:59,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-08 22:54:59,276 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-08 22:54:59,292 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-08 22:54:59,292 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:54:59,292 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:54:59,294 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-08 22:54:59,296 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:54:59,324 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-03-08 22:54:59,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2025-03-08 22:54:59,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-08 22:54:59,475 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 [2025-03-08 22:54:59,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:54:59,516 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:54:59,516 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:54:59,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21074837] [2025-03-08 22:54:59,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21074837] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:54:59,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:54:59,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2025-03-08 22:54:59,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879169398] [2025-03-08 22:54:59,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:54:59,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-08 22:54:59,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:54:59,517 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-08 22:54:59,517 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2025-03-08 22:54:59,517 INFO L87 Difference]: Start difference. First operand 74 states and 79 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-08 22:55:00,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:55:00,066 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2025-03-08 22:55:00,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-08 22:55:00,066 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2025-03-08 22:55:00,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:55:00,067 INFO L225 Difference]: With dead ends: 77 [2025-03-08 22:55:00,067 INFO L226 Difference]: Without dead ends: 77 [2025-03-08 22:55:00,067 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2025-03-08 22:55:00,068 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 114 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-08 22:55:00,068 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 101 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-08 22:55:00,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2025-03-08 22:55:00,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2025-03-08 22:55:00,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 50 states have (on average 1.32) internal successors, (66), 62 states have internal predecessors, (66), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-08 22:55:00,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2025-03-08 22:55:00,069 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 33 [2025-03-08 22:55:00,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:55:00,069 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2025-03-08 22:55:00,070 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-08 22:55:00,070 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2025-03-08 22:55:00,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-03-08 22:55:00,070 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:55:00,070 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:55:00,076 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-03-08 22:55:00,270 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:55:00,271 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_list_delErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2025-03-08 22:55:00,271 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:55:00,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1556152036, now seen corresponding path program 1 times [2025-03-08 22:55:00,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:55:00,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1416914123] [2025-03-08 22:55:00,271 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:55:00,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:55:00,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:55:00,273 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:55:00,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-08 22:55:00,323 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-08 22:55:00,344 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-08 22:55:00,344 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:55:00,344 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:55:00,347 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 76 conjuncts are in the unsatisfiable core [2025-03-08 22:55:00,352 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:55:00,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-08 22:55:00,471 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-03-08 22:55:00,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2025-03-08 22:55:00,829 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-08 22:55:00,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 22:55:00,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2025-03-08 22:55:01,099 INFO L349 Elim1Store]: treesize reduction 46, result has 35.2 percent of original size [2025-03-08 22:55:01,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 38 [2025-03-08 22:55:01,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-08 22:55:02,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:55:02,083 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:55:02,083 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:55:02,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416914123] [2025-03-08 22:55:02,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416914123] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:55:02,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:55:02,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2025-03-08 22:55:02,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707222172] [2025-03-08 22:55:02,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:55:02,084 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-08 22:55:02,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:55:02,084 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-08 22:55:02,084 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2025-03-08 22:55:02,084 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand has 24 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 18 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-08 22:55:04,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:55:04,044 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2025-03-08 22:55:04,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-03-08 22:55:04,045 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 18 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 35 [2025-03-08 22:55:04,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:55:04,045 INFO L225 Difference]: With dead ends: 77 [2025-03-08 22:55:04,045 INFO L226 Difference]: Without dead ends: 77 [2025-03-08 22:55:04,046 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=169, Invalid=1471, Unknown=0, NotChecked=0, Total=1640 [2025-03-08 22:55:04,046 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 80 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2025-03-08 22:55:04,046 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 299 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 838 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2025-03-08 22:55:04,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2025-03-08 22:55:04,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2025-03-08 22:55:04,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 50 states have (on average 1.3) internal successors, (65), 62 states have internal predecessors, (65), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-08 22:55:04,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2025-03-08 22:55:04,048 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 35 [2025-03-08 22:55:04,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:55:04,048 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2025-03-08 22:55:04,048 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 18 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-08 22:55:04,048 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2025-03-08 22:55:04,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-03-08 22:55:04,048 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:55:04,048 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:55:04,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2025-03-08 22:55:04,249 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:55:04,249 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_list_delErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2025-03-08 22:55:04,249 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:55:04,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1556152035, now seen corresponding path program 1 times [2025-03-08 22:55:04,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:55:04,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [361031497] [2025-03-08 22:55:04,249 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:55:04,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:55:04,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:55:04,251 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:55:04,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-08 22:55:04,298 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-08 22:55:04,320 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-08 22:55:04,320 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:55:04,320 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:55:04,323 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 87 conjuncts are in the unsatisfiable core [2025-03-08 22:55:04,325 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:55:04,470 INFO L349 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2025-03-08 22:55:04,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2025-03-08 22:55:04,488 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-03-08 22:55:04,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2025-03-08 22:55:04,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-08 22:55:04,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-08 22:55:04,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 22:55:04,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2025-03-08 22:55:04,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 22:55:04,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2025-03-08 22:55:05,818 INFO L349 Elim1Store]: treesize reduction 36, result has 49.3 percent of original size [2025-03-08 22:55:05,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 62 [2025-03-08 22:55:05,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 22:55:05,888 INFO L349 Elim1Store]: treesize reduction 46, result has 35.2 percent of original size [2025-03-08 22:55:05,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 38 [2025-03-08 22:55:07,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 22:55:07,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 10 [2025-03-08 22:55:07,022 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 22:55:07,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 15 [2025-03-08 22:55:07,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:55:07,129 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:55:07,129 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:55:07,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361031497] [2025-03-08 22:55:07,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361031497] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:55:07,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:55:07,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2025-03-08 22:55:07,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151200130] [2025-03-08 22:55:07,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:55:07,130 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-08 22:55:07,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:55:07,130 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-08 22:55:07,130 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2025-03-08 22:55:07,130 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand has 24 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 18 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-08 22:55:09,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:55:09,716 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2025-03-08 22:55:09,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-03-08 22:55:09,717 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 18 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 35 [2025-03-08 22:55:09,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:55:09,717 INFO L225 Difference]: With dead ends: 76 [2025-03-08 22:55:09,717 INFO L226 Difference]: Without dead ends: 76 [2025-03-08 22:55:09,718 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2025-03-08 22:55:09,719 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 85 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2025-03-08 22:55:09,719 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 372 Invalid, 947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 933 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2025-03-08 22:55:09,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2025-03-08 22:55:09,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2025-03-08 22:55:09,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 50 states have (on average 1.28) internal successors, (64), 62 states have internal predecessors, (64), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-08 22:55:09,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2025-03-08 22:55:09,720 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 35 [2025-03-08 22:55:09,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:55:09,721 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2025-03-08 22:55:09,721 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 18 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-08 22:55:09,721 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2025-03-08 22:55:09,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-03-08 22:55:09,721 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:55:09,721 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:55:09,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2025-03-08 22:55:09,921 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:55:09,921 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_list_delErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2025-03-08 22:55:09,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:55:09,922 INFO L85 PathProgramCache]: Analyzing trace with hash -996072874, now seen corresponding path program 1 times [2025-03-08 22:55:09,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:55:09,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1781693390] [2025-03-08 22:55:09,923 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:55:09,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:55:09,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:55:09,925 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:55:09,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-08 22:55:09,981 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-08 22:55:10,006 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-08 22:55:10,006 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:55:10,006 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:55:10,009 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 61 conjuncts are in the unsatisfiable core [2025-03-08 22:55:10,011 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:55:10,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-08 22:55:10,069 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-03-08 22:55:10,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2025-03-08 22:55:10,345 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 [2025-03-08 22:55:10,437 INFO L349 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2025-03-08 22:55:10,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 34 [2025-03-08 22:55:10,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-08 22:55:10,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2025-03-08 22:55:11,094 INFO L349 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2025-03-08 22:55:11,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 25 [2025-03-08 22:55:11,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:55:11,191 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:55:11,191 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:55:11,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781693390] [2025-03-08 22:55:11,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781693390] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:55:11,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:55:11,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2025-03-08 22:55:11,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128854570] [2025-03-08 22:55:11,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:55:11,191 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-08 22:55:11,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:55:11,191 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-08 22:55:11,192 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2025-03-08 22:55:11,192 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 18 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-08 22:55:16,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-08 22:55:17,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:55:17,681 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2025-03-08 22:55:17,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-08 22:55:17,682 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 18 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 36 [2025-03-08 22:55:17,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:55:17,682 INFO L225 Difference]: With dead ends: 74 [2025-03-08 22:55:17,682 INFO L226 Difference]: Without dead ends: 74 [2025-03-08 22:55:17,683 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=264, Invalid=1806, Unknown=0, NotChecked=0, Total=2070 [2025-03-08 22:55:17,683 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 147 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 958 mSolverCounterSat, 26 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 958 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2025-03-08 22:55:17,683 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 132 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 958 Invalid, 1 Unknown, 0 Unchecked, 5.5s Time] [2025-03-08 22:55:17,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2025-03-08 22:55:17,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2025-03-08 22:55:17,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 50 states have (on average 1.26) internal successors, (63), 62 states have internal predecessors, (63), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-08 22:55:17,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2025-03-08 22:55:17,685 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 36 [2025-03-08 22:55:17,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:55:17,685 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2025-03-08 22:55:17,685 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 18 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-08 22:55:17,685 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2025-03-08 22:55:17,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-03-08 22:55:17,685 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:55:17,685 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:55:17,694 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-03-08 22:55:17,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:55:17,891 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_list_delErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2025-03-08 22:55:17,891 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:55:17,891 INFO L85 PathProgramCache]: Analyzing trace with hash -996072873, now seen corresponding path program 1 times [2025-03-08 22:55:17,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:55:17,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [259418996] [2025-03-08 22:55:17,891 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:55:17,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:55:17,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:55:17,893 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:55:17,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-03-08 22:55:17,947 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-08 22:55:17,970 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-08 22:55:17,970 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:55:17,970 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:55:17,973 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 71 conjuncts are in the unsatisfiable core [2025-03-08 22:55:17,976 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:55:18,096 INFO L349 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2025-03-08 22:55:18,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2025-03-08 22:55:18,113 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-03-08 22:55:18,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2025-03-08 22:55:18,492 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 [2025-03-08 22:55:18,505 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 [2025-03-08 22:55:18,663 INFO L349 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2025-03-08 22:55:18,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 46 [2025-03-08 22:55:19,329 INFO L349 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2025-03-08 22:55:19,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2025-03-08 22:55:20,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 22:55:20,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2025-03-08 22:55:20,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 22:55:20,337 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-08 22:55:20,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 21 [2025-03-08 22:55:20,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:55:20,542 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:55:20,542 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:55:20,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259418996] [2025-03-08 22:55:20,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259418996] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:55:20,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:55:20,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2025-03-08 22:55:20,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546199306] [2025-03-08 22:55:20,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:55:20,542 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-08 22:55:20,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:55:20,543 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-08 22:55:20,543 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2025-03-08 22:55:20,543 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 18 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-08 22:55:23,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:55:23,606 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2025-03-08 22:55:23,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-08 22:55:23,606 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 18 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 36 [2025-03-08 22:55:23,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:55:23,607 INFO L225 Difference]: With dead ends: 74 [2025-03-08 22:55:23,607 INFO L226 Difference]: Without dead ends: 74 [2025-03-08 22:55:23,607 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=264, Invalid=1806, Unknown=0, NotChecked=0, Total=2070 [2025-03-08 22:55:23,608 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 153 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2025-03-08 22:55:23,608 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 118 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 895 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2025-03-08 22:55:23,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2025-03-08 22:55:23,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2025-03-08 22:55:23,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 50 states have (on average 1.24) internal successors, (62), 62 states have internal predecessors, (62), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-08 22:55:23,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2025-03-08 22:55:23,609 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 36 [2025-03-08 22:55:23,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:55:23,610 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2025-03-08 22:55:23,610 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 18 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-08 22:55:23,610 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2025-03-08 22:55:23,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-03-08 22:55:23,610 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:55:23,610 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:55:23,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2025-03-08 22:55:23,810 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:55:23,811 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2025-03-08 22:55:23,811 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:55:23,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1900915473, now seen corresponding path program 1 times [2025-03-08 22:55:23,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:55:23,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1120281741] [2025-03-08 22:55:23,811 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:55:23,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:55:23,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:55:23,813 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:55:23,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-03-08 22:55:23,866 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-03-08 22:55:23,887 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-03-08 22:55:23,887 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:55:23,887 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:55:23,889 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 55 conjuncts are in the unsatisfiable core [2025-03-08 22:55:23,891 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:55:23,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-08 22:55:24,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-08 22:55:24,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-08 22:55:24,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2025-03-08 22:55:24,382 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 9 treesize of output 5 [2025-03-08 22:55:25,047 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 22:55:25,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 31 [2025-03-08 22:55:25,057 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2025-03-08 22:55:25,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 10 [2025-03-08 22:55:25,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:55:25,088 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:55:25,088 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:55:25,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120281741] [2025-03-08 22:55:25,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120281741] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:55:25,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:55:25,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2025-03-08 22:55:25,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681095073] [2025-03-08 22:55:25,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:55:25,089 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-08 22:55:25,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:55:25,089 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-08 22:55:25,089 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2025-03-08 22:55:25,089 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand has 23 states, 22 states have (on average 1.5) internal successors, (33), 20 states have internal predecessors, (33), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-08 22:55:27,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:55:27,788 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2025-03-08 22:55:27,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-03-08 22:55:27,788 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.5) internal successors, (33), 20 states have internal predecessors, (33), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 41 [2025-03-08 22:55:27,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:55:27,788 INFO L225 Difference]: With dead ends: 76 [2025-03-08 22:55:27,789 INFO L226 Difference]: Without dead ends: 76 [2025-03-08 22:55:27,789 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=165, Invalid=1395, Unknown=0, NotChecked=0, Total=1560 [2025-03-08 22:55:27,789 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 49 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2025-03-08 22:55:27,789 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 352 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2025-03-08 22:55:27,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2025-03-08 22:55:27,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2025-03-08 22:55:27,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 52 states have (on average 1.25) internal successors, (65), 63 states have internal predecessors, (65), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-08 22:55:27,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2025-03-08 22:55:27,791 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 41 [2025-03-08 22:55:27,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:55:27,791 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2025-03-08 22:55:27,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.5) internal successors, (33), 20 states have internal predecessors, (33), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-08 22:55:27,791 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2025-03-08 22:55:27,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-03-08 22:55:27,791 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:55:27,791 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:55:27,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2025-03-08 22:55:27,992 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:55:27,993 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2025-03-08 22:55:27,994 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:55:27,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1900915472, now seen corresponding path program 1 times [2025-03-08 22:55:27,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:55:27,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [273433151] [2025-03-08 22:55:27,994 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:55:27,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:55:27,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:55:27,996 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:55:27,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-03-08 22:55:28,053 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-03-08 22:55:28,080 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-03-08 22:55:28,080 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:55:28,080 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:55:28,083 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 97 conjuncts are in the unsatisfiable core [2025-03-08 22:55:28,086 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:55:28,263 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-03-08 22:55:28,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2025-03-08 22:55:28,270 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 12 treesize of output 14 [2025-03-08 22:55:28,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-08 22:55:28,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-08 22:55:29,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 22:55:29,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2025-03-08 22:55:29,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 22:55:29,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2025-03-08 22:55:29,256 INFO L349 Elim1Store]: treesize reduction 46, result has 35.2 percent of original size [2025-03-08 22:55:29,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 52 [2025-03-08 22:55:29,346 INFO L349 Elim1Store]: treesize reduction 36, result has 49.3 percent of original size [2025-03-08 22:55:29,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 48 [2025-03-08 22:55:31,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 22:55:31,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 10 [2025-03-08 22:55:31,016 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 22:55:31,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 15 [2025-03-08 22:55:31,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 22:55:31,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 10 [2025-03-08 22:55:31,887 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 22:55:31,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 15 [2025-03-08 22:55:31,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:55:31,973 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:55:31,973 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:55:31,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273433151] [2025-03-08 22:55:31,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273433151] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:55:31,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:55:31,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2025-03-08 22:55:31,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083869992] [2025-03-08 22:55:31,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:55:31,974 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-08 22:55:31,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:55:31,974 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-08 22:55:31,974 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2025-03-08 22:55:31,974 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 29 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 23 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-08 22:55:37,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:55:37,449 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2025-03-08 22:55:37,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2025-03-08 22:55:37,450 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 23 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 41 [2025-03-08 22:55:37,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:55:37,450 INFO L225 Difference]: With dead ends: 76 [2025-03-08 22:55:37,450 INFO L226 Difference]: Without dead ends: 76 [2025-03-08 22:55:37,451 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=275, Invalid=2695, Unknown=0, NotChecked=0, Total=2970 [2025-03-08 22:55:37,451 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 91 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 1113 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 1128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2025-03-08 22:55:37,451 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 316 Invalid, 1128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1113 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2025-03-08 22:55:37,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2025-03-08 22:55:37,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2025-03-08 22:55:37,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 52 states have (on average 1.2307692307692308) internal successors, (64), 63 states have internal predecessors, (64), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-08 22:55:37,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2025-03-08 22:55:37,453 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 41 [2025-03-08 22:55:37,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:55:37,453 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2025-03-08 22:55:37,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 23 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-08 22:55:37,453 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2025-03-08 22:55:37,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-03-08 22:55:37,453 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:55:37,453 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:55:37,462 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2025-03-08 22:55:37,654 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:55:37,654 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ldv_list_delErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2025-03-08 22:55:37,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:55:37,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1058564578, now seen corresponding path program 1 times [2025-03-08 22:55:37,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:55:37,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1991454561] [2025-03-08 22:55:37,655 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:55:37,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:55:37,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:55:37,657 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:55:37,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-03-08 22:55:37,719 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-03-08 22:55:37,741 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-03-08 22:55:37,741 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:55:37,741 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:55:37,743 INFO L256 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-08 22:55:37,744 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:55:37,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:55:37,768 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:55:37,768 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:55:37,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991454561] [2025-03-08 22:55:37,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991454561] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:55:37,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:55:37,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 22:55:37,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026528183] [2025-03-08 22:55:37,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:55:37,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 22:55:37,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:55:37,769 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 22:55:37,769 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-08 22:55:37,769 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand has 6 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-08 22:55:37,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:55:37,886 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2025-03-08 22:55:37,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 22:55:37,887 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 46 [2025-03-08 22:55:37,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:55:37,887 INFO L225 Difference]: With dead ends: 75 [2025-03-08 22:55:37,887 INFO L226 Difference]: Without dead ends: 75 [2025-03-08 22:55:37,888 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-08 22:55:37,888 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 16 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 22:55:37,888 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 175 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 22:55:37,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2025-03-08 22:55:37,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2025-03-08 22:55:37,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 52 states have (on average 1.2115384615384615) internal successors, (63), 62 states have internal predecessors, (63), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-08 22:55:37,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2025-03-08 22:55:37,893 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 46 [2025-03-08 22:55:37,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:55:37,893 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2025-03-08 22:55:37,893 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-08 22:55:37,893 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2025-03-08 22:55:37,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-03-08 22:55:37,894 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:55:37,894 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:55:37,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2025-03-08 22:55:38,094 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:55:38,094 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ldv_list_delErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2025-03-08 22:55:38,095 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:55:38,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1058564577, now seen corresponding path program 1 times [2025-03-08 22:55:38,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:55:38,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [444505469] [2025-03-08 22:55:38,095 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:55:38,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:55:38,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:55:38,097 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:55:38,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2025-03-08 22:55:38,156 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-03-08 22:55:38,289 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-03-08 22:55:38,289 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:55:38,289 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:55:38,293 INFO L256 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 71 conjuncts are in the unsatisfiable core [2025-03-08 22:55:38,296 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:55:38,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-08 22:55:38,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-08 22:55:38,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-08 22:55:38,915 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 9 treesize of output 5 [2025-03-08 22:55:39,681 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 22:55:39,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 59 [2025-03-08 22:55:39,696 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 22:55:39,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 35 [2025-03-08 22:55:40,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:55:40,551 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 22:55:46,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:55:46,358 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:55:46,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444505469] [2025-03-08 22:55:46,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444505469] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 22:55:46,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 22:55:46,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 14] total 39 [2025-03-08 22:55:46,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876005559] [2025-03-08 22:55:46,358 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 22:55:46,358 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2025-03-08 22:55:46,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:55:46,359 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2025-03-08 22:55:46,359 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1412, Unknown=0, NotChecked=0, Total=1560 [2025-03-08 22:55:46,359 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand has 40 states, 39 states have (on average 1.8461538461538463) internal successors, (72), 32 states have internal predecessors, (72), 7 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2025-03-08 22:55:55,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:55:55,601 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2025-03-08 22:55:55,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-03-08 22:55:55,602 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.8461538461538463) internal successors, (72), 32 states have internal predecessors, (72), 7 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 46 [2025-03-08 22:55:55,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:55:55,603 INFO L225 Difference]: With dead ends: 81 [2025-03-08 22:55:55,603 INFO L226 Difference]: Without dead ends: 81 [2025-03-08 22:55:55,604 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=369, Invalid=3537, Unknown=0, NotChecked=0, Total=3906 [2025-03-08 22:55:55,604 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 109 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 1067 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 1093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2025-03-08 22:55:55,604 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 414 Invalid, 1093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1067 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2025-03-08 22:55:55,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2025-03-08 22:55:55,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2025-03-08 22:55:55,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 67 states have internal predecessors, (69), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2025-03-08 22:55:55,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2025-03-08 22:55:55,606 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 46 [2025-03-08 22:55:55,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:55:55,607 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2025-03-08 22:55:55,607 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.8461538461538463) internal successors, (72), 32 states have internal predecessors, (72), 7 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2025-03-08 22:55:55,607 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2025-03-08 22:55:55,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2025-03-08 22:55:55,607 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:55:55,607 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:55:55,615 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2025-03-08 22:55:55,807 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:55:55,808 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2025-03-08 22:55:55,808 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:55:55,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1544316752, now seen corresponding path program 1 times [2025-03-08 22:55:55,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:55:55,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [114596118] [2025-03-08 22:55:55,808 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:55:55,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:55:55,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:55:55,810 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:55:55,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2025-03-08 22:55:55,876 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-03-08 22:55:55,901 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-03-08 22:55:55,901 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:55:55,901 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:55:55,904 INFO L256 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-08 22:55:55,905 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:55:55,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2025-03-08 22:55:55,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2025-03-08 22:55:56,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2025-03-08 22:55:56,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2025-03-08 22:55:56,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 22:55:56,238 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:55:56,238 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:55:56,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114596118] [2025-03-08 22:55:56,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114596118] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:55:56,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:55:56,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2025-03-08 22:55:56,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747266186] [2025-03-08 22:55:56,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:55:56,239 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-08 22:55:56,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:55:56,239 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-08 22:55:56,239 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2025-03-08 22:55:56,239 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand has 13 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 9 states have internal predecessors, (38), 3 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2025-03-08 22:55:56,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:55:56,982 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2025-03-08 22:55:56,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-08 22:55:56,982 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 9 states have internal predecessors, (38), 3 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 47 [2025-03-08 22:55:56,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:55:56,983 INFO L225 Difference]: With dead ends: 79 [2025-03-08 22:55:56,983 INFO L226 Difference]: Without dead ends: 79 [2025-03-08 22:55:56,983 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2025-03-08 22:55:56,983 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 50 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-08 22:55:56,983 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 236 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-08 22:55:56,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2025-03-08 22:55:56,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2025-03-08 22:55:56,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 65 states have internal predecessors, (67), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2025-03-08 22:55:56,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2025-03-08 22:55:56,985 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 47 [2025-03-08 22:55:56,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:55:56,985 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2025-03-08 22:55:56,985 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 9 states have internal predecessors, (38), 3 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2025-03-08 22:55:56,985 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2025-03-08 22:55:56,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-03-08 22:55:56,986 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:55:56,986 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:55:56,993 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2025-03-08 22:55:57,186 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:55:57,186 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ldv_list_delErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2025-03-08 22:55:57,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:55:57,187 INFO L85 PathProgramCache]: Analyzing trace with hash -2047462952, now seen corresponding path program 1 times [2025-03-08 22:55:57,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:55:57,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [43227960] [2025-03-08 22:55:57,187 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:55:57,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:55:57,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:55:57,189 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:55:57,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2025-03-08 22:55:57,265 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-03-08 22:55:57,296 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-03-08 22:55:57,296 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:55:57,296 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:55:57,300 INFO L256 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 113 conjuncts are in the unsatisfiable core [2025-03-08 22:55:57,303 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:55:57,466 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-03-08 22:55:57,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2025-03-08 22:55:57,475 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 12 treesize of output 14 [2025-03-08 22:55:58,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-08 22:55:58,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-08 22:55:58,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 22:55:58,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2025-03-08 22:55:58,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 22:55:58,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2025-03-08 22:55:58,434 INFO L349 Elim1Store]: treesize reduction 36, result has 49.3 percent of original size [2025-03-08 22:55:58,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 48 [2025-03-08 22:55:58,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 22:55:58,539 INFO L349 Elim1Store]: treesize reduction 46, result has 35.2 percent of original size [2025-03-08 22:55:58,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 38 [2025-03-08 22:55:59,935 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 22:55:59,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 29 [2025-03-08 22:55:59,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 22:55:59,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2025-03-08 22:56:00,682 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 33 treesize of output 23 [2025-03-08 22:56:00,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 22:56:00,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 10 [2025-03-08 22:56:00,938 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 22:56:00,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 15 [2025-03-08 22:56:01,589 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:56:01,589 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 22:56:02,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 66 [2025-03-08 22:56:03,105 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:56:03,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43227960] [2025-03-08 22:56:03,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43227960] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 22:56:03,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [889501419] [2025-03-08 22:56:03,106 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:56:03,106 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2025-03-08 22:56:03,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2025-03-08 22:56:03,108 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2025-03-08 22:56:03,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2025-03-08 22:56:03,197 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-03-08 22:56:03,440 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-03-08 22:56:03,441 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:56:03,441 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:56:03,445 INFO L256 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 75 conjuncts are in the unsatisfiable core [2025-03-08 22:56:03,447 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:56:03,897 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-03-08 22:56:03,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2025-03-08 22:56:03,919 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-03-08 22:56:03,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2025-03-08 22:56:05,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-08 22:56:05,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 22:56:05,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2025-03-08 22:56:05,431 INFO L349 Elim1Store]: treesize reduction 46, result has 35.2 percent of original size [2025-03-08 22:56:05,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 28 treesize of output 38 [2025-03-08 22:56:05,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-08 22:56:07,826 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:56:07,826 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 22:56:09,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [889501419] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 22:56:09,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 22:56:09,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 28] total 60 [2025-03-08 22:56:09,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971966164] [2025-03-08 22:56:09,710 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 22:56:09,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2025-03-08 22:56:09,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:56:09,711 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2025-03-08 22:56:09,711 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=5302, Unknown=0, NotChecked=0, Total=5550 [2025-03-08 22:56:09,712 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand has 61 states, 58 states have (on average 1.3793103448275863) internal successors, (80), 49 states have internal predecessors, (80), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-08 22:56:16,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:56:16,481 INFO L93 Difference]: Finished difference Result 53 states and 52 transitions. [2025-03-08 22:56:16,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2025-03-08 22:56:16,481 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 58 states have (on average 1.3793103448275863) internal successors, (80), 49 states have internal predecessors, (80), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 49 [2025-03-08 22:56:16,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:56:16,482 INFO L225 Difference]: With dead ends: 53 [2025-03-08 22:56:16,482 INFO L226 Difference]: Without dead ends: 53 [2025-03-08 22:56:16,483 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2186 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=515, Invalid=9385, Unknown=0, NotChecked=0, Total=9900 [2025-03-08 22:56:16,484 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 69 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 1686 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 1714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2025-03-08 22:56:16,484 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 468 Invalid, 1714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1686 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2025-03-08 22:56:16,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2025-03-08 22:56:16,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2025-03-08 22:56:16,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 42 states have (on average 1.0) internal successors, (42), 42 states have internal predecessors, (42), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-08 22:56:16,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 52 transitions. [2025-03-08 22:56:16,486 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 52 transitions. Word has length 49 [2025-03-08 22:56:16,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:56:16,486 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 52 transitions. [2025-03-08 22:56:16,486 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 58 states have (on average 1.3793103448275863) internal successors, (80), 49 states have internal predecessors, (80), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-08 22:56:16,486 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 52 transitions. [2025-03-08 22:56:16,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2025-03-08 22:56:16,487 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:56:16,487 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:56:16,494 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2025-03-08 22:56:16,692 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 0 [2025-03-08 22:56:16,887 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2025-03-08 22:56:16,887 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2025-03-08 22:56:16,888 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:56:16,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1809827523, now seen corresponding path program 1 times [2025-03-08 22:56:16,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:56:16,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [794870743] [2025-03-08 22:56:16,888 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:56:16,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:56:16,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:56:16,890 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:56:16,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2025-03-08 22:56:16,961 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes. [2025-03-08 22:56:17,113 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements. [2025-03-08 22:56:17,113 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:56:17,113 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-08 22:56:17,113 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-03-08 22:56:17,134 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes. [2025-03-08 22:56:17,258 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements. [2025-03-08 22:56:17,258 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:56:17,258 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-08 22:56:17,293 INFO L130 FreeRefinementEngine]: Strategy FOX found a feasible trace [2025-03-08 22:56:17,293 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-03-08 22:56:17,294 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (28 of 29 remaining) [2025-03-08 22:56:17,295 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 29 remaining) [2025-03-08 22:56:17,295 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 29 remaining) [2025-03-08 22:56:17,295 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 29 remaining) [2025-03-08 22:56:17,295 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 29 remaining) [2025-03-08 22:56:17,295 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 29 remaining) [2025-03-08 22:56:17,295 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 29 remaining) [2025-03-08 22:56:17,295 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 29 remaining) [2025-03-08 22:56:17,295 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 29 remaining) [2025-03-08 22:56:17,295 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 29 remaining) [2025-03-08 22:56:17,295 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 29 remaining) [2025-03-08 22:56:17,295 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 29 remaining) [2025-03-08 22:56:17,295 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 29 remaining) [2025-03-08 22:56:17,295 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 29 remaining) [2025-03-08 22:56:17,295 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 29 remaining) [2025-03-08 22:56:17,295 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 29 remaining) [2025-03-08 22:56:17,295 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 29 remaining) [2025-03-08 22:56:17,295 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 29 remaining) [2025-03-08 22:56:17,295 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 29 remaining) [2025-03-08 22:56:17,295 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 29 remaining) [2025-03-08 22:56:17,295 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 29 remaining) [2025-03-08 22:56:17,295 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 29 remaining) [2025-03-08 22:56:17,296 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 29 remaining) [2025-03-08 22:56:17,296 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 29 remaining) [2025-03-08 22:56:17,296 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 29 remaining) [2025-03-08 22:56:17,296 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 29 remaining) [2025-03-08 22:56:17,296 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 29 remaining) [2025-03-08 22:56:17,296 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 29 remaining) [2025-03-08 22:56:17,296 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 29 remaining) [2025-03-08 22:56:17,306 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2025-03-08 22:56:17,496 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:56:17,498 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:56:17,518 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-03-08 22:56:17,523 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.03 10:56:17 BoogieIcfgContainer [2025-03-08 22:56:17,523 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-03-08 22:56:17,523 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-03-08 22:56:17,523 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-03-08 22:56:17,524 INFO L274 PluginConnector]: Witness Printer initialized [2025-03-08 22:56:17,524 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 10:54:45" (3/4) ... [2025-03-08 22:56:17,525 INFO L149 WitnessPrinter]: No result that supports witness generation found [2025-03-08 22:56:17,526 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-03-08 22:56:17,526 INFO L158 Benchmark]: Toolchain (without parser) took 93383.10ms. Allocated memory was 100.7MB in the beginning and 184.5MB in the end (delta: 83.9MB). Free memory was 74.2MB in the beginning and 113.6MB in the end (delta: -39.3MB). Peak memory consumption was 45.1MB. Max. memory is 16.1GB. [2025-03-08 22:56:17,526 INFO L158 Benchmark]: CDTParser took 0.85ms. Allocated memory is still 83.9MB. Free memory is still 62.8MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-08 22:56:17,530 INFO L158 Benchmark]: CACSL2BoogieTranslator took 397.48ms. Allocated memory is still 100.7MB. Free memory was 74.2MB in the beginning and 46.2MB in the end (delta: 28.0MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2025-03-08 22:56:17,530 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.47ms. Allocated memory is still 100.7MB. Free memory was 46.2MB in the beginning and 44.1MB in the end (delta: 2.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-08 22:56:17,530 INFO L158 Benchmark]: Boogie Preprocessor took 48.86ms. Allocated memory is still 100.7MB. Free memory was 44.1MB in the beginning and 41.6MB in the end (delta: 2.4MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-08 22:56:17,530 INFO L158 Benchmark]: IcfgBuilder took 467.12ms. Allocated memory is still 100.7MB. Free memory was 41.3MB in the beginning and 61.9MB in the end (delta: -20.6MB). Peak memory consumption was 21.2MB. Max. memory is 16.1GB. [2025-03-08 22:56:17,530 INFO L158 Benchmark]: TraceAbstraction took 92430.89ms. Allocated memory was 100.7MB in the beginning and 184.5MB in the end (delta: 83.9MB). Free memory was 61.9MB in the beginning and 113.6MB in the end (delta: -51.7MB). Peak memory consumption was 32.3MB. Max. memory is 16.1GB. [2025-03-08 22:56:17,530 INFO L158 Benchmark]: Witness Printer took 2.36ms. Allocated memory is still 184.5MB. Free memory was 113.6MB in the beginning and 113.6MB in the end (delta: 25.8kB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-08 22:56:17,531 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.85ms. Allocated memory is still 83.9MB. Free memory is still 62.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 397.48ms. Allocated memory is still 100.7MB. Free memory was 74.2MB in the beginning and 46.2MB in the end (delta: 28.0MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.47ms. Allocated memory is still 100.7MB. Free memory was 46.2MB in the beginning and 44.1MB in the end (delta: 2.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 48.86ms. Allocated memory is still 100.7MB. Free memory was 44.1MB in the beginning and 41.6MB in the end (delta: 2.4MB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 467.12ms. Allocated memory is still 100.7MB. Free memory was 41.3MB in the beginning and 61.9MB in the end (delta: -20.6MB). Peak memory consumption was 21.2MB. Max. memory is 16.1GB. * TraceAbstraction took 92430.89ms. Allocated memory was 100.7MB in the beginning and 184.5MB in the end (delta: 83.9MB). Free memory was 61.9MB in the beginning and 113.6MB in the end (delta: -51.7MB). Peak memory consumption was 32.3MB. Max. memory is 16.1GB. * Witness Printer took 2.36ms. Allocated memory is still 184.5MB. Free memory was 113.6MB in the beginning and 113.6MB in the end (delta: 25.8kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 780]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 780. Possible FailurePath: [L569] struct ldv_list_head ldv_global_msg_list = { &(ldv_global_msg_list), &(ldv_global_msg_list) }; [L569] struct ldv_list_head ldv_global_msg_list = { &(ldv_global_msg_list), &(ldv_global_msg_list) }; [L569] struct ldv_list_head ldv_global_msg_list = { &(ldv_global_msg_list), &(ldv_global_msg_list) }; [L757] struct ldv_list_head global_list_13 = { &(global_list_13), &(global_list_13) }; [L757] struct ldv_list_head global_list_13 = { &(global_list_13), &(global_list_13) }; [L757] struct ldv_list_head global_list_13 = { &(global_list_13), &(global_list_13) }; VAL [global_list_13={2:0}, ldv_global_msg_list={1:0}] [L781] CALL entry_point() [L776] CALL alloc_13() [L763] CALL, EXPR ldv_malloc(sizeof(struct A13)) VAL [\old(size)=12, global_list_13={2:0}, ldv_global_msg_list={1:0}] [L526] COND TRUE __VERIFIER_nondet_int() [L527] return malloc(size); [L763] RET, EXPR ldv_malloc(sizeof(struct A13)) VAL [global_list_13={2:0}, ldv_global_msg_list={1:0}] [L763] struct A13 *p = (struct A13 *)ldv_malloc(sizeof(struct A13)); [L764] COND TRUE \read(*p) VAL [global_list_13={2:0}, ldv_global_msg_list={1:0}, p={3:0}] [L765] CALL ldv_list_add(&p->list, &global_list_13) VAL [\old(head)={2:0}, \old(new)={3:4}, global_list_13={2:0}, ldv_global_msg_list={1:0}] [L559] EXPR head->next VAL [\old(head)={2:0}, \old(new)={3:4}, global_list_13={2:0}, head={2:0}, ldv_global_msg_list={1:0}, new={3:4}] [L559] CALL __ldv_list_add(new, head, head->next) VAL [\old(new)={3:4}, \old(next)={2:0}, \old(prev)={2:0}, global_list_13={2:0}, ldv_global_msg_list={1:0}] [L547] next->prev = new VAL [\old(new)={3:4}, \old(next)={2:0}, \old(prev)={2:0}, global_list_13={2:0}, ldv_global_msg_list={1:0}, new={3:4}, next={2:0}, prev={2:0}] [L548] new->next = next VAL [\old(new)={3:4}, \old(next)={2:0}, \old(prev)={2:0}, global_list_13={2:0}, ldv_global_msg_list={1:0}, new={3:4}, prev={2:0}] [L549] new->prev = prev VAL [\old(new)={3:4}, \old(next)={2:0}, \old(prev)={2:0}, global_list_13={2:0}, ldv_global_msg_list={1:0}, new={3:4}, prev={2:0}] [L550] prev->next = new VAL [\old(new)={3:4}, \old(next)={2:0}, \old(prev)={2:0}, global_list_13={2:0}, ldv_global_msg_list={1:0}] [L559] RET __ldv_list_add(new, head, head->next) VAL [\old(head)={2:0}, \old(new)={3:4}, global_list_13={2:0}, head={2:0}, ldv_global_msg_list={1:0}, new={3:4}] [L765] RET ldv_list_add(&p->list, &global_list_13) VAL [global_list_13={2:0}, ldv_global_msg_list={1:0}, p={3:0}] [L776] RET alloc_13() [L777] CALL free_unsafe_13() [L769] struct A13 *p; [L770] struct A13 *n; VAL [global_list_13={2:0}, ldv_global_msg_list={1:0}] [L771] EXPR (&global_list_13)->next VAL [global_list_13={2:0}, ldv_global_msg_list={1:0}] [L771] const typeof( ((typeof(*p) *)0)->list ) *__mptr = ((&global_list_13)->next); [L771] { const typeof( ((typeof(*p) *)0)->list ) *__mptr = ((&global_list_13)->next); (typeof(*p) *)( (char *)__mptr - ((size_t) &((typeof(*p) *)0)->list) );} [L771] p = ({ const typeof( ((typeof(*p) *)0)->list ) *__mptr = ((&global_list_13)->next); (typeof(*p) *)( (char *)__mptr - ((size_t) &((typeof(*p) *)0)->list) );}) VAL [global_list_13={2:0}, ldv_global_msg_list={1:0}, p={3:0}] [L771] EXPR (p)->list.next VAL [global_list_13={2:0}, ldv_global_msg_list={1:0}] [L771] const typeof( ((typeof(*(p)) *)0)->list ) *__mptr = ((p)->list.next); [L771] { const typeof( ((typeof(*(p)) *)0)->list ) *__mptr = ((p)->list.next); (typeof(*(p)) *)( (char *)__mptr - ((size_t) &((typeof(*(p)) *)0)->list) );} [L771] n = ({ const typeof( ((typeof(*(p)) *)0)->list ) *__mptr = ((p)->list.next); (typeof(*(p)) *)( (char *)__mptr - ((size_t) &((typeof(*(p)) *)0)->list) );}) [L771] COND TRUE &p->list != (&global_list_13) VAL [global_list_13={2:0}, ldv_global_msg_list={1:0}] [L772] CALL ldv_list_del(&p->list) VAL [global_list_13={2:0}, ldv_global_msg_list={1:0}] [L567] EXPR entry->prev VAL [\old(entry)={3:4}, entry={3:4}, global_list_13={2:0}, ldv_global_msg_list={1:0}] [L567] EXPR entry->next VAL [\old(entry)={3:4}, global_list_13={2:0}, ldv_global_msg_list={1:0}] [L567] CALL __ldv_list_del(entry->prev, entry->next) [L554] next->prev = prev VAL [\old(entry)={3:4}, global_list_13={2:0}, ldv_global_msg_list={1:0}] [L555] prev->next = next VAL [\old(entry)={3:4}, global_list_13={2:0}, ldv_global_msg_list={1:0}] [L567] RET __ldv_list_del(entry->prev, entry->next) [L772] RET ldv_list_del(&p->list) VAL [global_list_13={2:0}, ldv_global_msg_list={1:0}, n={2:-4}, p={3:0}] [L771] p = n VAL [global_list_13={2:0}, ldv_global_msg_list={1:0}, n={2:-4}, p={2:-4}] [L771] EXPR (n)->list.next VAL [global_list_13={2:0}, ldv_global_msg_list={1:0}] [L771] const typeof( ((typeof(*(n)) *)0)->list ) *__mptr = ((n)->list.next); [L771] { const typeof( ((typeof(*(n)) *)0)->list ) *__mptr = ((n)->list.next); (typeof(*(n)) *)( (char *)__mptr - ((size_t) &((typeof(*(n)) *)0)->list) );} [L771] n = ({ const typeof( ((typeof(*(n)) *)0)->list ) *__mptr = ((n)->list.next); (typeof(*(n)) *)( (char *)__mptr - ((size_t) &((typeof(*(n)) *)0)->list) );}) [L771] COND FALSE !(&p->list != (&global_list_13)) VAL [global_list_13={2:0}, ldv_global_msg_list={1:0}] [L777] RET free_unsafe_13() [L778] CALL LDV_INIT_LIST_HEAD(&global_list_13) VAL [\old(list)={2:0}, global_list_13={2:0}, ldv_global_msg_list={1:0}] [L540] list->next = list VAL [\old(list)={2:0}, global_list_13={2:0}, ldv_global_msg_list={1:0}, list={2:0}] [L541] list->prev = list VAL [\old(list)={2:0}, global_list_13={2:0}, ldv_global_msg_list={1:0}] [L778] RET LDV_INIT_LIST_HEAD(&global_list_13) VAL [global_list_13={2:0}, ldv_global_msg_list={1:0}] [L781] RET entry_point() - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 82 locations, 89 edges, 29 error locations. Started 1 CEGAR loops. OverallTime: 92.4s, OverallIterations: 31, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 45.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 1931 SdHoareTripleChecker+Valid, 27.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1902 mSDsluCounter, 7261 SdHoareTripleChecker+Invalid, 25.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 6070 mSDsCounter, 319 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 13375 IncrementalHoareTripleChecker+Invalid, 13695 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 319 mSolverCounterUnsat, 1191 mSDtfsCounter, 13375 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1153 GetRequests, 500 SyntacticMatches, 0 SemanticMatches, 653 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5465 ImplicationChecksByTransitivity, 40.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=97occurred in iteration=8, InterpolantAutomatonStates: 462, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 30 MinimizatonAttempts, 208 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 37.0s InterpolantComputationTime, 903 NumberOfCodeBlocks, 903 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 865 ConstructedInterpolants, 301 QuantifiedInterpolants, 21435 SizeOfPredicates, 270 NumberOfNonLiveVariables, 4467 ConjunctsInSsa, 1038 ConjunctsInUnsatCore, 32 InterpolantComputations, 28 PerfectInterpolantSequences, 7/27 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2025-03-08 22:56:17,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample