./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety-broom/linux-list-fst-data.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety-broom/linux-list-fst-data.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-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 64bit --witnessprinter.graph.data.programhash 2c99ca0700d3067c5b23f9ea1940dd43a17b3da467130e3c19500119915a8761 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 12:06:51,223 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 12:06:51,272 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2025-03-17 12:06:51,276 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 12:06:51,276 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 12:06:51,294 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 12:06:51,295 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 12:06:51,296 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 12:06:51,296 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 12:06:51,296 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 12:06:51,297 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 12:06:51,297 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 12:06:51,297 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 12:06:51,298 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 12:06:51,298 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 12:06:51,298 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 12:06:51,298 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 12:06:51,298 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 12:06:51,298 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-17 12:06:51,299 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-17 12:06:51,299 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-17 12:06:51,299 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 12:06:51,299 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-17 12:06:51,299 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-17 12:06:51,299 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 12:06:51,299 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 12:06:51,299 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 12:06:51,299 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 12:06:51,299 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 12:06:51,299 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 12:06:51,300 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 12:06:51,300 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 12:06:51,300 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 12:06:51,300 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 12:06:51,300 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 12:06:51,300 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 12:06:51,300 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 12:06:51,300 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 12:06:51,300 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 12:06:51,300 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 -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2c99ca0700d3067c5b23f9ea1940dd43a17b3da467130e3c19500119915a8761 [2025-03-17 12:06:51,515 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 12:06:51,524 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 12:06:51,526 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 12:06:51,526 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 12:06:51,527 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 12:06:51,527 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-broom/linux-list-fst-data.i [2025-03-17 12:06:52,757 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe06a23f6/42b1f2bbd34a436ab9933c4cac344012/FLAG237334f81 [2025-03-17 12:06:53,160 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 12:06:53,163 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-broom/linux-list-fst-data.i [2025-03-17 12:06:53,188 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe06a23f6/42b1f2bbd34a436ab9933c4cac344012/FLAG237334f81 [2025-03-17 12:06:53,347 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe06a23f6/42b1f2bbd34a436ab9933c4cac344012 [2025-03-17 12:06:53,349 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 12:06:53,350 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 12:06:53,351 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 12:06:53,351 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 12:06:53,354 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 12:06:53,355 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 12:06:53" (1/1) ... [2025-03-17 12:06:53,355 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1792eb7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 12:06:53, skipping insertion in model container [2025-03-17 12:06:53,355 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 12:06:53" (1/1) ... [2025-03-17 12:06:53,406 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 12:06:53,643 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 12:06:53,652 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) [2025-03-17 12:06:53,652 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@101040e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 12:06:53, skipping insertion in model container [2025-03-17 12:06:53,653 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 12:06:53,653 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2025-03-17 12:06:53,654 INFO L158 Benchmark]: Toolchain (without parser) took 303.94ms. Allocated memory is still 167.8MB. Free memory was 122.7MB in the beginning and 108.4MB in the end (delta: 14.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-03-17 12:06:53,654 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 201.3MB. Free memory is still 116.0MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-17 12:06:53,655 INFO L158 Benchmark]: CACSL2BoogieTranslator took 302.03ms. Allocated memory is still 167.8MB. Free memory was 122.7MB in the beginning and 108.4MB in the end (delta: 14.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-03-17 12:06:53,655 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 201.3MB. Free memory is still 116.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 302.03ms. Allocated memory is still 167.8MB. Free memory was 122.7MB in the beginning and 108.4MB in the end (delta: 14.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2490]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety-broom/linux-list-fst-data.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-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 64bit --witnessprinter.graph.data.programhash 2c99ca0700d3067c5b23f9ea1940dd43a17b3da467130e3c19500119915a8761 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 12:06:55,356 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 12:06:55,445 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Bitvector.epf [2025-03-17 12:06:55,449 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 12:06:55,449 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 12:06:55,473 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 12:06:55,473 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 12:06:55,473 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 12:06:55,474 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 12:06:55,474 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 12:06:55,474 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 12:06:55,474 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 12:06:55,474 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 12:06:55,474 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 12:06:55,474 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 12:06:55,474 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 12:06:55,474 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 12:06:55,474 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 12:06:55,474 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-17 12:06:55,474 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-17 12:06:55,475 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-17 12:06:55,475 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 12:06:55,475 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-17 12:06:55,475 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2025-03-17 12:06:55,475 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2025-03-17 12:06:55,475 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-17 12:06:55,475 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 12:06:55,475 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 12:06:55,475 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 12:06:55,475 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 12:06:55,475 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 12:06:55,475 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 12:06:55,475 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 12:06:55,475 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 12:06:55,475 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 12:06:55,475 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2025-03-17 12:06:55,475 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2025-03-17 12:06:55,475 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 12:06:55,475 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 12:06:55,475 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 12:06:55,475 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 12:06:55,475 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 -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2c99ca0700d3067c5b23f9ea1940dd43a17b3da467130e3c19500119915a8761 [2025-03-17 12:06:55,739 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 12:06:55,747 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 12:06:55,749 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 12:06:55,752 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 12:06:55,752 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 12:06:55,753 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-broom/linux-list-fst-data.i [2025-03-17 12:06:56,897 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2caa6e1ec/298b86f5da2544e7a653dd0e3ef028f3/FLAGee137993c [2025-03-17 12:06:57,146 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 12:06:57,150 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-broom/linux-list-fst-data.i [2025-03-17 12:06:57,174 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2caa6e1ec/298b86f5da2544e7a653dd0e3ef028f3/FLAGee137993c [2025-03-17 12:06:57,461 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2caa6e1ec/298b86f5da2544e7a653dd0e3ef028f3 [2025-03-17 12:06:57,463 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 12:06:57,465 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 12:06:57,466 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 12:06:57,466 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 12:06:57,469 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 12:06:57,469 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 12:06:57" (1/1) ... [2025-03-17 12:06:57,470 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b34b0ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 12:06:57, skipping insertion in model container [2025-03-17 12:06:57,470 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 12:06:57" (1/1) ... [2025-03-17 12:06:57,503 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 12:06:57,712 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 12:06:57,722 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2025-03-17 12:06:57,731 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 12:06:57,772 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 12:06:57,778 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 12:06:57,812 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 12:06:57,836 INFO L204 MainTranslator]: Completed translation [2025-03-17 12:06:57,837 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 12:06:57 WrapperNode [2025-03-17 12:06:57,837 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 12:06:57,838 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 12:06:57,838 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 12:06:57,838 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 12:06:57,843 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 12:06:57" (1/1) ... [2025-03-17 12:06:57,861 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 12:06:57" (1/1) ... [2025-03-17 12:06:57,880 INFO L138 Inliner]: procedures = 125, calls = 33, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 94 [2025-03-17 12:06:57,881 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 12:06:57,881 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 12:06:57,881 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 12:06:57,882 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 12:06:57,889 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 12:06:57" (1/1) ... [2025-03-17 12:06:57,889 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 12:06:57" (1/1) ... [2025-03-17 12:06:57,894 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 12:06:57" (1/1) ... [2025-03-17 12:06:57,915 INFO L175 MemorySlicer]: Split 19 memory accesses to 1 slices as follows [19]. 100 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0]. The 11 writes are split as follows [11]. [2025-03-17 12:06:57,915 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 12:06:57" (1/1) ... [2025-03-17 12:06:57,916 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 12:06:57" (1/1) ... [2025-03-17 12:06:57,930 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 12:06:57" (1/1) ... [2025-03-17 12:06:57,930 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 12:06:57" (1/1) ... [2025-03-17 12:06:57,933 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 12:06:57" (1/1) ... [2025-03-17 12:06:57,934 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 12:06:57" (1/1) ... [2025-03-17 12:06:57,936 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 12:06:57,936 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 12:06:57,936 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 12:06:57,937 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 12:06:57,937 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 12:06:57" (1/1) ... [2025-03-17 12:06:57,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 12:06:57,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:06:57,963 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) [2025-03-17 12:06:57,964 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 [2025-03-17 12:06:57,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-17 12:06:57,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-03-17 12:06:57,981 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-03-17 12:06:57,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-17 12:06:57,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2025-03-17 12:06:57,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 12:06:57,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 12:06:58,064 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 12:06:58,065 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 12:06:58,532 INFO L? ?]: Removed 126 outVars from TransFormulas that were not future-live. [2025-03-17 12:06:58,533 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 12:06:58,543 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 12:06:58,543 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 12:06:58,543 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 12:06:58 BoogieIcfgContainer [2025-03-17 12:06:58,544 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 12:06:58,545 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 12:06:58,545 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 12:06:58,549 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 12:06:58,550 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 12:06:57" (1/3) ... [2025-03-17 12:06:58,551 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30aafbfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 12:06:58, skipping insertion in model container [2025-03-17 12:06:58,551 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 12:06:57" (2/3) ... [2025-03-17 12:06:58,552 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30aafbfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 12:06:58, skipping insertion in model container [2025-03-17 12:06:58,552 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 12:06:58" (3/3) ... [2025-03-17 12:06:58,553 INFO L128 eAbstractionObserver]: Analyzing ICFG linux-list-fst-data.i [2025-03-17 12:06:58,565 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 12:06:58,567 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG linux-list-fst-data.i that has 1 procedures, 91 locations, 1 initial locations, 4 loop locations, and 45 error locations. [2025-03-17 12:06:58,602 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 12:06:58,612 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;@7bdb080b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 12:06:58,612 INFO L334 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2025-03-17 12:06:58,615 INFO L276 IsEmpty]: Start isEmpty. Operand has 91 states, 45 states have (on average 2.1333333333333333) internal successors, (96), 90 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:06:58,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2025-03-17 12:06:58,618 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:06:58,619 INFO L218 NwaCegarLoop]: trace histogram [1, 1] [2025-03-17 12:06:58,619 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr43REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 42 more)] === [2025-03-17 12:06:58,622 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:06:58,622 INFO L85 PathProgramCache]: Analyzing trace with hash 4030, now seen corresponding path program 1 times [2025-03-17 12:06:58,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-17 12:06:58,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [400112491] [2025-03-17 12:06:58,629 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 12:06:58,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:06:58,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:06:58,631 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) [2025-03-17 12:06:58,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-17 12:06:58,688 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-03-17 12:06:58,694 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-03-17 12:06:58,694 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:06:58,694 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:06:58,695 INFO L256 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-17 12:06:58,698 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:06:58,735 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 [2025-03-17 12:06:58,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 12:06:58,751 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 12:06:58,752 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-17 12:06:58,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400112491] [2025-03-17 12:06:58,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400112491] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 12:06:58,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 12:06:58,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-03-17 12:06:58,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665371457] [2025-03-17 12:06:58,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 12:06:58,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 12:06:58,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-17 12:06:58,771 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 12:06:58,771 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 12:06:58,773 INFO L87 Difference]: Start difference. First operand has 91 states, 45 states have (on average 2.1333333333333333) internal successors, (96), 90 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:06:58,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:06:58,936 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2025-03-17 12:06:58,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 12:06:58,938 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2025-03-17 12:06:58,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:06:58,942 INFO L225 Difference]: With dead ends: 89 [2025-03-17 12:06:58,942 INFO L226 Difference]: Without dead ends: 87 [2025-03-17 12:06:58,943 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 12:06:58,945 INFO L435 NwaCegarLoop]: 72 mSDtfsCounter, 26 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 12:06:58,945 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 104 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 12:06:58,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2025-03-17 12:06:58,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2025-03-17 12:06:58,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 44 states have (on average 2.022727272727273) internal successors, (89), 86 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:06:58,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2025-03-17 12:06:58,968 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 2 [2025-03-17 12:06:58,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:06:58,968 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2025-03-17 12:06:58,968 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:06:58,968 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2025-03-17 12:06:58,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2025-03-17 12:06:58,968 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:06:58,968 INFO L218 NwaCegarLoop]: trace histogram [1, 1] [2025-03-17 12:06:58,974 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-17 12:06:59,169 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 [2025-03-17 12:06:59,169 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr44REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 42 more)] === [2025-03-17 12:06:59,169 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:06:59,169 INFO L85 PathProgramCache]: Analyzing trace with hash 4031, now seen corresponding path program 1 times [2025-03-17 12:06:59,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-17 12:06:59,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1142843065] [2025-03-17 12:06:59,170 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 12:06:59,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:06:59,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:06:59,172 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) [2025-03-17 12:06:59,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-17 12:06:59,216 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-03-17 12:06:59,220 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-03-17 12:06:59,220 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:06:59,220 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:06:59,221 INFO L256 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-17 12:06:59,223 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:06:59,237 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 [2025-03-17 12:06:59,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 12:06:59,251 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 12:06:59,251 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-17 12:06:59,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142843065] [2025-03-17 12:06:59,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142843065] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 12:06:59,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 12:06:59,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-03-17 12:06:59,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869059589] [2025-03-17 12:06:59,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 12:06:59,253 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 12:06:59,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-17 12:06:59,253 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 12:06:59,253 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 12:06:59,253 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:06:59,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:06:59,474 INFO L93 Difference]: Finished difference Result 88 states and 91 transitions. [2025-03-17 12:06:59,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 12:06:59,475 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2025-03-17 12:06:59,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:06:59,476 INFO L225 Difference]: With dead ends: 88 [2025-03-17 12:06:59,476 INFO L226 Difference]: Without dead ends: 88 [2025-03-17 12:06:59,476 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 12:06:59,477 INFO L435 NwaCegarLoop]: 83 mSDtfsCounter, 5 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-17 12:06:59,477 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 129 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-17 12:06:59,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2025-03-17 12:06:59,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 85. [2025-03-17 12:06:59,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 84 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:06:59,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2025-03-17 12:06:59,482 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 2 [2025-03-17 12:06:59,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:06:59,482 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2025-03-17 12:06:59,482 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:06:59,482 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2025-03-17 12:06:59,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-03-17 12:06:59,484 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:06:59,484 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-17 12:06:59,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-17 12:06:59,688 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 [2025-03-17 12:06:59,688 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 42 more)] === [2025-03-17 12:06:59,688 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:06:59,689 INFO L85 PathProgramCache]: Analyzing trace with hash -532368267, now seen corresponding path program 1 times [2025-03-17 12:06:59,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-17 12:06:59,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [469898250] [2025-03-17 12:06:59,689 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 12:06:59,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:06:59,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:06:59,691 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) [2025-03-17 12:06:59,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-17 12:06:59,737 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-17 12:06:59,749 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-17 12:06:59,749 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:06:59,749 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:06:59,752 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-17 12:06:59,753 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:06:59,762 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 [2025-03-17 12:06:59,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 12:06:59,773 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 12:06:59,773 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-17 12:06:59,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469898250] [2025-03-17 12:06:59,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469898250] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 12:06:59,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 12:06:59,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 12:06:59,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540733426] [2025-03-17 12:06:59,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 12:06:59,774 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 12:06:59,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-17 12:06:59,774 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 12:06:59,774 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 12:06:59,774 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:06:59,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:06:59,975 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2025-03-17 12:06:59,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 12:06:59,976 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2025-03-17 12:06:59,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:06:59,977 INFO L225 Difference]: With dead ends: 84 [2025-03-17 12:06:59,977 INFO L226 Difference]: Without dead ends: 84 [2025-03-17 12:06:59,977 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 12:06:59,977 INFO L435 NwaCegarLoop]: 83 mSDtfsCounter, 1 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-17 12:06:59,978 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 128 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-17 12:06:59,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2025-03-17 12:06:59,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2025-03-17 12:06:59,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 44 states have (on average 1.9545454545454546) internal successors, (86), 83 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:06:59,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2025-03-17 12:06:59,982 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 7 [2025-03-17 12:06:59,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:06:59,982 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2025-03-17 12:06:59,982 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:06:59,983 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2025-03-17 12:06:59,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-03-17 12:06:59,983 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:06:59,983 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-17 12:06:59,989 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-17 12:07:00,187 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 [2025-03-17 12:07:00,187 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 42 more)] === [2025-03-17 12:07:00,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:07:00,187 INFO L85 PathProgramCache]: Analyzing trace with hash -532368268, now seen corresponding path program 1 times [2025-03-17 12:07:00,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-17 12:07:00,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [481768443] [2025-03-17 12:07:00,188 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 12:07:00,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:07:00,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:07:00,191 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) [2025-03-17 12:07:00,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-17 12:07:00,247 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-17 12:07:00,256 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-17 12:07:00,256 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:07:00,256 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:07:00,257 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-17 12:07:00,258 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:07:00,263 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 [2025-03-17 12:07:00,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 12:07:00,268 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 12:07:00,268 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-17 12:07:00,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481768443] [2025-03-17 12:07:00,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481768443] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 12:07:00,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 12:07:00,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 12:07:00,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781999597] [2025-03-17 12:07:00,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 12:07:00,269 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 12:07:00,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-17 12:07:00,270 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 12:07:00,270 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 12:07:00,270 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:00,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:07:00,454 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2025-03-17 12:07:00,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 12:07:00,457 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2025-03-17 12:07:00,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:07:00,458 INFO L225 Difference]: With dead ends: 83 [2025-03-17 12:07:00,458 INFO L226 Difference]: Without dead ends: 83 [2025-03-17 12:07:00,458 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 12:07:00,458 INFO L435 NwaCegarLoop]: 83 mSDtfsCounter, 1 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-17 12:07:00,459 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 123 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-17 12:07:00,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2025-03-17 12:07:00,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2025-03-17 12:07:00,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 82 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:00,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2025-03-17 12:07:00,463 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 7 [2025-03-17 12:07:00,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:07:00,463 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2025-03-17 12:07:00,463 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:00,463 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2025-03-17 12:07:00,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-03-17 12:07:00,463 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:07:00,464 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 12:07:00,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-17 12:07:00,664 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 [2025-03-17 12:07:00,664 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 42 more)] === [2025-03-17 12:07:00,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:07:00,665 INFO L85 PathProgramCache]: Analyzing trace with hash 676451352, now seen corresponding path program 1 times [2025-03-17 12:07:00,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-17 12:07:00,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [519751079] [2025-03-17 12:07:00,665 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 12:07:00,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:07:00,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:07:00,667 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) [2025-03-17 12:07:00,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-17 12:07:00,708 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-17 12:07:00,716 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-17 12:07:00,716 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:07:00,716 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:07:00,717 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-17 12:07:00,718 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:07:00,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 12:07:00,741 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 12:07:00,741 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-17 12:07:00,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519751079] [2025-03-17 12:07:00,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519751079] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 12:07:00,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 12:07:00,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 12:07:00,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598511023] [2025-03-17 12:07:00,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 12:07:00,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 12:07:00,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-17 12:07:00,742 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 12:07:00,742 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 12:07:00,742 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:00,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:07:00,912 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2025-03-17 12:07:00,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 12:07:00,913 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2025-03-17 12:07:00,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:07:00,913 INFO L225 Difference]: With dead ends: 82 [2025-03-17 12:07:00,913 INFO L226 Difference]: Without dead ends: 82 [2025-03-17 12:07:00,914 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 12:07:00,914 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 26 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-17 12:07:00,914 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 125 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-17 12:07:00,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2025-03-17 12:07:00,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2025-03-17 12:07:00,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 44 states have (on average 1.9090909090909092) internal successors, (84), 81 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:00,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2025-03-17 12:07:00,917 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 8 [2025-03-17 12:07:00,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:07:00,918 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2025-03-17 12:07:00,918 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:00,918 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2025-03-17 12:07:00,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-03-17 12:07:00,918 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:07:00,918 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 12:07:00,925 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-17 12:07:01,118 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 [2025-03-17 12:07:01,119 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 42 more)] === [2025-03-17 12:07:01,119 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:07:01,119 INFO L85 PathProgramCache]: Analyzing trace with hash 676451353, now seen corresponding path program 1 times [2025-03-17 12:07:01,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-17 12:07:01,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1932382634] [2025-03-17 12:07:01,120 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 12:07:01,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:07:01,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:07:01,122 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) [2025-03-17 12:07:01,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-17 12:07:01,159 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-17 12:07:01,167 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-17 12:07:01,168 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:07:01,168 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:07:01,171 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-17 12:07:01,172 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:07:01,178 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 [2025-03-17 12:07:01,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 12:07:01,249 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 12:07:01,249 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-17 12:07:01,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932382634] [2025-03-17 12:07:01,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932382634] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 12:07:01,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 12:07:01,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 12:07:01,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885233556] [2025-03-17 12:07:01,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 12:07:01,250 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 12:07:01,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-17 12:07:01,250 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 12:07:01,250 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 12:07:01,250 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:01,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:07:01,532 INFO L93 Difference]: Finished difference Result 92 states and 96 transitions. [2025-03-17 12:07:01,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 12:07:01,533 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2025-03-17 12:07:01,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:07:01,534 INFO L225 Difference]: With dead ends: 92 [2025-03-17 12:07:01,534 INFO L226 Difference]: Without dead ends: 92 [2025-03-17 12:07:01,534 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 12:07:01,534 INFO L435 NwaCegarLoop]: 75 mSDtfsCounter, 7 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-17 12:07:01,534 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 161 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-17 12:07:01,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2025-03-17 12:07:01,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 86. [2025-03-17 12:07:01,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 48 states have (on average 1.8541666666666667) internal successors, (89), 85 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:01,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2025-03-17 12:07:01,538 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 8 [2025-03-17 12:07:01,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:07:01,538 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2025-03-17 12:07:01,538 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:01,538 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2025-03-17 12:07:01,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-03-17 12:07:01,538 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:07:01,539 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 12:07:01,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-17 12:07:01,743 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 [2025-03-17 12:07:01,743 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 42 more)] === [2025-03-17 12:07:01,744 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:07:01,744 INFO L85 PathProgramCache]: Analyzing trace with hash -504795823, now seen corresponding path program 1 times [2025-03-17 12:07:01,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-17 12:07:01,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [351597805] [2025-03-17 12:07:01,744 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 12:07:01,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:07:01,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:07:01,746 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) [2025-03-17 12:07:01,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-17 12:07:01,784 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-17 12:07:01,803 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-17 12:07:01,803 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:07:01,803 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:07:01,805 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-17 12:07:01,807 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:07:01,843 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2025-03-17 12:07:01,844 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 [2025-03-17 12:07:01,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 12:07:01,858 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 12:07:01,859 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-17 12:07:01,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351597805] [2025-03-17 12:07:01,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351597805] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 12:07:01,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 12:07:01,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 12:07:01,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914208768] [2025-03-17 12:07:01,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 12:07:01,859 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 12:07:01,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-17 12:07:01,860 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 12:07:01,860 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 12:07:01,860 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:02,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:07:02,040 INFO L93 Difference]: Finished difference Result 85 states and 88 transitions. [2025-03-17 12:07:02,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 12:07:02,041 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2025-03-17 12:07:02,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:07:02,041 INFO L225 Difference]: With dead ends: 85 [2025-03-17 12:07:02,041 INFO L226 Difference]: Without dead ends: 85 [2025-03-17 12:07:02,042 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-17 12:07:02,042 INFO L435 NwaCegarLoop]: 66 mSDtfsCounter, 19 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-17 12:07:02,042 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 135 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-17 12:07:02,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2025-03-17 12:07:02,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2025-03-17 12:07:02,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 48 states have (on average 1.8333333333333333) internal successors, (88), 84 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:02,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2025-03-17 12:07:02,045 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 9 [2025-03-17 12:07:02,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:07:02,045 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2025-03-17 12:07:02,045 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:02,045 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2025-03-17 12:07:02,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-03-17 12:07:02,046 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:07:02,046 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 12:07:02,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-17 12:07:02,246 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 [2025-03-17 12:07:02,247 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 42 more)] === [2025-03-17 12:07:02,247 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:07:02,247 INFO L85 PathProgramCache]: Analyzing trace with hash -504795822, now seen corresponding path program 1 times [2025-03-17 12:07:02,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-17 12:07:02,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [38443688] [2025-03-17 12:07:02,247 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 12:07:02,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:07:02,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:07:02,249 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) [2025-03-17 12:07:02,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-17 12:07:02,304 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-17 12:07:02,322 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-17 12:07:02,322 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:07:02,322 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:07:02,325 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-17 12:07:02,328 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:07:02,336 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 [2025-03-17 12:07:02,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 12:07:02,412 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 [2025-03-17 12:07:02,423 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-03-17 12:07:02,423 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 [2025-03-17 12:07:02,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 12:07:02,454 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 12:07:02,455 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-17 12:07:02,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38443688] [2025-03-17 12:07:02,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38443688] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 12:07:02,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 12:07:02,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 12:07:02,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034172011] [2025-03-17 12:07:02,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 12:07:02,456 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 12:07:02,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-17 12:07:02,456 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 12:07:02,456 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 12:07:02,456 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:02,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:07:02,775 INFO L93 Difference]: Finished difference Result 84 states and 87 transitions. [2025-03-17 12:07:02,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 12:07:02,775 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2025-03-17 12:07:02,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:07:02,776 INFO L225 Difference]: With dead ends: 84 [2025-03-17 12:07:02,776 INFO L226 Difference]: Without dead ends: 84 [2025-03-17 12:07:02,776 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-03-17 12:07:02,777 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 19 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-17 12:07:02,777 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 155 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-17 12:07:02,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2025-03-17 12:07:02,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2025-03-17 12:07:02,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 48 states have (on average 1.8125) internal successors, (87), 83 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:02,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2025-03-17 12:07:02,780 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 9 [2025-03-17 12:07:02,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:07:02,780 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2025-03-17 12:07:02,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:02,780 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2025-03-17 12:07:02,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-03-17 12:07:02,780 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:07:02,780 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 12:07:02,787 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-17 12:07:02,981 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 [2025-03-17 12:07:02,981 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 42 more)] === [2025-03-17 12:07:02,981 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:07:02,981 INFO L85 PathProgramCache]: Analyzing trace with hash 175699231, now seen corresponding path program 1 times [2025-03-17 12:07:02,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-17 12:07:02,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1160892355] [2025-03-17 12:07:02,982 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 12:07:02,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:07:02,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:07:02,984 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) [2025-03-17 12:07:02,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-17 12:07:03,025 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-17 12:07:03,036 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-17 12:07:03,036 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:07:03,036 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:07:03,038 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-17 12:07:03,040 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:07:03,050 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 [2025-03-17 12:07:03,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 12:07:03,124 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 12:07:03,124 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-17 12:07:03,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160892355] [2025-03-17 12:07:03,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160892355] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 12:07:03,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 12:07:03,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 12:07:03,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250422482] [2025-03-17 12:07:03,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 12:07:03,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 12:07:03,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-17 12:07:03,125 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 12:07:03,125 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-17 12:07:03,126 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:03,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:07:03,520 INFO L93 Difference]: Finished difference Result 129 states and 135 transitions. [2025-03-17 12:07:03,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 12:07:03,521 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2025-03-17 12:07:03,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:07:03,521 INFO L225 Difference]: With dead ends: 129 [2025-03-17 12:07:03,521 INFO L226 Difference]: Without dead ends: 129 [2025-03-17 12:07:03,522 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-17 12:07:03,522 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 44 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-17 12:07:03,522 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 166 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-17 12:07:03,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2025-03-17 12:07:03,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 108. [2025-03-17 12:07:03,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 72 states have (on average 1.875) internal successors, (135), 107 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:03,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 135 transitions. [2025-03-17 12:07:03,528 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 135 transitions. Word has length 11 [2025-03-17 12:07:03,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:07:03,528 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 135 transitions. [2025-03-17 12:07:03,528 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:03,528 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 135 transitions. [2025-03-17 12:07:03,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-03-17 12:07:03,528 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:07:03,528 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 12:07:03,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-17 12:07:03,729 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 [2025-03-17 12:07:03,729 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 42 more)] === [2025-03-17 12:07:03,730 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:07:03,730 INFO L85 PathProgramCache]: Analyzing trace with hash 175699230, now seen corresponding path program 1 times [2025-03-17 12:07:03,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-17 12:07:03,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [757336004] [2025-03-17 12:07:03,730 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 12:07:03,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:07:03,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:07:03,732 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) [2025-03-17 12:07:03,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-17 12:07:03,776 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-17 12:07:03,788 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-17 12:07:03,789 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:07:03,789 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:07:03,791 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-17 12:07:03,792 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:07:03,795 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 [2025-03-17 12:07:03,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 12:07:03,825 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 12:07:03,825 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-17 12:07:03,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757336004] [2025-03-17 12:07:03,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757336004] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 12:07:03,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 12:07:03,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 12:07:03,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622427536] [2025-03-17 12:07:03,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 12:07:03,826 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 12:07:03,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-17 12:07:03,827 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 12:07:03,827 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-17 12:07:03,827 INFO L87 Difference]: Start difference. First operand 108 states and 135 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:04,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:07:04,076 INFO L93 Difference]: Finished difference Result 153 states and 197 transitions. [2025-03-17 12:07:04,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 12:07:04,076 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2025-03-17 12:07:04,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:07:04,077 INFO L225 Difference]: With dead ends: 153 [2025-03-17 12:07:04,077 INFO L226 Difference]: Without dead ends: 153 [2025-03-17 12:07:04,077 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-17 12:07:04,077 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 60 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-17 12:07:04,078 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 124 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-17 12:07:04,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2025-03-17 12:07:04,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 113. [2025-03-17 12:07:04,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 78 states have (on average 1.8333333333333333) internal successors, (143), 112 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:04,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 143 transitions. [2025-03-17 12:07:04,081 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 143 transitions. Word has length 11 [2025-03-17 12:07:04,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:07:04,081 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 143 transitions. [2025-03-17 12:07:04,081 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:04,081 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 143 transitions. [2025-03-17 12:07:04,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-03-17 12:07:04,082 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:07:04,082 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 12:07:04,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-17 12:07:04,282 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 [2025-03-17 12:07:04,283 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 42 more)] === [2025-03-17 12:07:04,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:07:04,283 INFO L85 PathProgramCache]: Analyzing trace with hash 175699390, now seen corresponding path program 1 times [2025-03-17 12:07:04,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-17 12:07:04,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2008474757] [2025-03-17 12:07:04,283 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 12:07:04,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:07:04,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:07:04,285 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) [2025-03-17 12:07:04,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-17 12:07:04,328 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-17 12:07:04,338 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-17 12:07:04,338 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:07:04,338 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:07:04,339 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-17 12:07:04,341 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:07:04,348 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 [2025-03-17 12:07:04,359 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 [2025-03-17 12:07:04,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2025-03-17 12:07:04,472 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 12:07:04,473 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 24 treesize of output 10 [2025-03-17 12:07:04,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 12:07:04,495 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 12:07:04,495 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-17 12:07:04,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008474757] [2025-03-17 12:07:04,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008474757] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 12:07:04,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 12:07:04,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-17 12:07:04,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397407423] [2025-03-17 12:07:04,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 12:07:04,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 12:07:04,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-17 12:07:04,496 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 12:07:04,496 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-03-17 12:07:04,496 INFO L87 Difference]: Start difference. First operand 113 states and 143 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:05,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:07:05,036 INFO L93 Difference]: Finished difference Result 118 states and 148 transitions. [2025-03-17 12:07:05,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 12:07:05,037 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2025-03-17 12:07:05,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:07:05,038 INFO L225 Difference]: With dead ends: 118 [2025-03-17 12:07:05,038 INFO L226 Difference]: Without dead ends: 118 [2025-03-17 12:07:05,038 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2025-03-17 12:07:05,038 INFO L435 NwaCegarLoop]: 59 mSDtfsCounter, 30 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-17 12:07:05,038 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 264 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-17 12:07:05,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2025-03-17 12:07:05,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 115. [2025-03-17 12:07:05,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 80 states have (on average 1.8375) internal successors, (147), 114 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:05,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 147 transitions. [2025-03-17 12:07:05,043 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 147 transitions. Word has length 11 [2025-03-17 12:07:05,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:07:05,043 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 147 transitions. [2025-03-17 12:07:05,043 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:05,043 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 147 transitions. [2025-03-17 12:07:05,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-03-17 12:07:05,043 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:07:05,043 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 12:07:05,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-17 12:07:05,244 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 [2025-03-17 12:07:05,244 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 42 more)] === [2025-03-17 12:07:05,245 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:07:05,245 INFO L85 PathProgramCache]: Analyzing trace with hash 175699391, now seen corresponding path program 1 times [2025-03-17 12:07:05,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-17 12:07:05,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [453705895] [2025-03-17 12:07:05,245 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 12:07:05,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:07:05,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:07:05,247 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) [2025-03-17 12:07:05,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-17 12:07:05,302 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-17 12:07:05,313 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-17 12:07:05,313 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:07:05,313 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:07:05,315 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-17 12:07:05,316 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:07:05,324 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 [2025-03-17 12:07:05,330 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 [2025-03-17 12:07:05,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2025-03-17 12:07:05,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2025-03-17 12:07:05,429 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 [2025-03-17 12:07:05,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 12:07:05,436 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 12:07:05,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2025-03-17 12:07:05,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 12:07:05,481 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 12:07:05,481 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-17 12:07:05,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453705895] [2025-03-17 12:07:05,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453705895] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 12:07:05,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 12:07:05,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-17 12:07:05,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258456452] [2025-03-17 12:07:05,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 12:07:05,481 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 12:07:05,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-17 12:07:05,482 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 12:07:05,482 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-03-17 12:07:05,482 INFO L87 Difference]: Start difference. First operand 115 states and 147 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:05,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:07:05,835 INFO L93 Difference]: Finished difference Result 112 states and 139 transitions. [2025-03-17 12:07:05,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 12:07:05,836 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2025-03-17 12:07:05,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:07:05,837 INFO L225 Difference]: With dead ends: 112 [2025-03-17 12:07:05,837 INFO L226 Difference]: Without dead ends: 112 [2025-03-17 12:07:05,837 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2025-03-17 12:07:05,837 INFO L435 NwaCegarLoop]: 75 mSDtfsCounter, 4 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-17 12:07:05,837 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 331 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-17 12:07:05,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2025-03-17 12:07:05,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2025-03-17 12:07:05,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 76 states have (on average 1.8157894736842106) internal successors, (138), 110 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:05,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 138 transitions. [2025-03-17 12:07:05,840 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 138 transitions. Word has length 11 [2025-03-17 12:07:05,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:07:05,841 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 138 transitions. [2025-03-17 12:07:05,841 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:05,841 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 138 transitions. [2025-03-17 12:07:05,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-03-17 12:07:05,841 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:07:05,841 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 12:07:05,852 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-17 12:07:06,041 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 [2025-03-17 12:07:06,042 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 42 more)] === [2025-03-17 12:07:06,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:07:06,042 INFO L85 PathProgramCache]: Analyzing trace with hash 222519918, now seen corresponding path program 1 times [2025-03-17 12:07:06,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-17 12:07:06,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [751755381] [2025-03-17 12:07:06,042 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 12:07:06,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:07:06,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:07:06,044 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) [2025-03-17 12:07:06,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-17 12:07:06,092 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-17 12:07:06,107 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-17 12:07:06,108 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:07:06,108 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:07:06,111 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-17 12:07:06,112 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:07:06,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 12:07:06,123 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 12:07:06,123 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-17 12:07:06,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751755381] [2025-03-17 12:07:06,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751755381] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 12:07:06,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 12:07:06,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 12:07:06,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564747411] [2025-03-17 12:07:06,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 12:07:06,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 12:07:06,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-17 12:07:06,124 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 12:07:06,124 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 12:07:06,124 INFO L87 Difference]: Start difference. First operand 111 states and 138 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:06,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:07:06,294 INFO L93 Difference]: Finished difference Result 110 states and 137 transitions. [2025-03-17 12:07:06,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 12:07:06,295 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2025-03-17 12:07:06,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:07:06,295 INFO L225 Difference]: With dead ends: 110 [2025-03-17 12:07:06,295 INFO L226 Difference]: Without dead ends: 110 [2025-03-17 12:07:06,296 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 12:07:06,296 INFO L435 NwaCegarLoop]: 75 mSDtfsCounter, 3 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-17 12:07:06,296 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 151 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-17 12:07:06,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2025-03-17 12:07:06,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2025-03-17 12:07:06,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 76 states have (on average 1.8026315789473684) internal successors, (137), 109 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:06,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 137 transitions. [2025-03-17 12:07:06,299 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 137 transitions. Word has length 11 [2025-03-17 12:07:06,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:07:06,299 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 137 transitions. [2025-03-17 12:07:06,299 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:06,299 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 137 transitions. [2025-03-17 12:07:06,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-03-17 12:07:06,299 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:07:06,299 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 12:07:06,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-17 12:07:06,504 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 [2025-03-17 12:07:06,504 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 42 more)] === [2025-03-17 12:07:06,504 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:07:06,504 INFO L85 PathProgramCache]: Analyzing trace with hash 222519919, now seen corresponding path program 1 times [2025-03-17 12:07:06,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-17 12:07:06,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1555342760] [2025-03-17 12:07:06,505 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 12:07:06,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:07:06,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:07:06,507 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) [2025-03-17 12:07:06,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-17 12:07:06,560 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-17 12:07:06,578 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-17 12:07:06,579 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:07:06,579 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:07:06,581 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-17 12:07:06,583 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:07:06,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 12:07:06,623 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 12:07:06,623 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-17 12:07:06,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555342760] [2025-03-17 12:07:06,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555342760] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 12:07:06,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 12:07:06,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 12:07:06,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85974254] [2025-03-17 12:07:06,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 12:07:06,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 12:07:06,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-17 12:07:06,624 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 12:07:06,624 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-17 12:07:06,624 INFO L87 Difference]: Start difference. First operand 110 states and 137 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:06,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:07:06,844 INFO L93 Difference]: Finished difference Result 109 states and 136 transitions. [2025-03-17 12:07:06,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 12:07:06,846 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2025-03-17 12:07:06,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:07:06,846 INFO L225 Difference]: With dead ends: 109 [2025-03-17 12:07:06,846 INFO L226 Difference]: Without dead ends: 109 [2025-03-17 12:07:06,846 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2025-03-17 12:07:06,847 INFO L435 NwaCegarLoop]: 70 mSDtfsCounter, 18 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-17 12:07:06,847 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 234 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-17 12:07:06,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2025-03-17 12:07:06,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2025-03-17 12:07:06,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 76 states have (on average 1.7894736842105263) internal successors, (136), 108 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:06,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 136 transitions. [2025-03-17 12:07:06,849 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 136 transitions. Word has length 11 [2025-03-17 12:07:06,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:07:06,849 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 136 transitions. [2025-03-17 12:07:06,849 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:06,849 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 136 transitions. [2025-03-17 12:07:06,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-03-17 12:07:06,850 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:07:06,850 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 12:07:06,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-17 12:07:07,050 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 [2025-03-17 12:07:07,051 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 42 more)] === [2025-03-17 12:07:07,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:07:07,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1691817097, now seen corresponding path program 1 times [2025-03-17 12:07:07,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-17 12:07:07,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [599764627] [2025-03-17 12:07:07,052 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 12:07:07,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:07:07,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:07:07,054 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) [2025-03-17 12:07:07,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-17 12:07:07,102 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-17 12:07:07,121 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-17 12:07:07,121 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:07:07,121 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:07:07,125 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-17 12:07:07,127 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:07:07,131 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 [2025-03-17 12:07:07,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 12:07:07,155 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 12:07:07,155 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-17 12:07:07,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599764627] [2025-03-17 12:07:07,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599764627] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 12:07:07,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 12:07:07,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 12:07:07,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971109201] [2025-03-17 12:07:07,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 12:07:07,156 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 12:07:07,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-17 12:07:07,156 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 12:07:07,156 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-17 12:07:07,157 INFO L87 Difference]: Start difference. First operand 109 states and 136 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:07,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:07:07,409 INFO L93 Difference]: Finished difference Result 107 states and 134 transitions. [2025-03-17 12:07:07,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 12:07:07,410 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2025-03-17 12:07:07,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:07:07,410 INFO L225 Difference]: With dead ends: 107 [2025-03-17 12:07:07,410 INFO L226 Difference]: Without dead ends: 107 [2025-03-17 12:07:07,410 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-17 12:07:07,411 INFO L435 NwaCegarLoop]: 66 mSDtfsCounter, 4 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-17 12:07:07,411 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 172 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-17 12:07:07,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2025-03-17 12:07:07,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2025-03-17 12:07:07,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 76 states have (on average 1.763157894736842) internal successors, (134), 106 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:07,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 134 transitions. [2025-03-17 12:07:07,413 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 134 transitions. Word has length 12 [2025-03-17 12:07:07,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:07:07,413 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 134 transitions. [2025-03-17 12:07:07,413 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:07,413 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 134 transitions. [2025-03-17 12:07:07,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-03-17 12:07:07,414 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:07:07,414 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 12:07:07,421 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-17 12:07:07,614 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 [2025-03-17 12:07:07,615 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 42 more)] === [2025-03-17 12:07:07,615 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:07:07,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1691817096, now seen corresponding path program 1 times [2025-03-17 12:07:07,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-17 12:07:07,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [547584491] [2025-03-17 12:07:07,615 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 12:07:07,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:07:07,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:07:07,617 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) [2025-03-17 12:07:07,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-17 12:07:07,670 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-17 12:07:07,688 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-17 12:07:07,688 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:07:07,688 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:07:07,691 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-17 12:07:07,692 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:07:07,699 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 [2025-03-17 12:07:07,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 12:07:07,750 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 12:07:07,750 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-17 12:07:07,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547584491] [2025-03-17 12:07:07,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547584491] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 12:07:07,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 12:07:07,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 12:07:07,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506866959] [2025-03-17 12:07:07,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 12:07:07,751 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 12:07:07,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-17 12:07:07,751 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 12:07:07,751 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-17 12:07:07,751 INFO L87 Difference]: Start difference. First operand 107 states and 134 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:08,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:07:08,028 INFO L93 Difference]: Finished difference Result 105 states and 132 transitions. [2025-03-17 12:07:08,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 12:07:08,028 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2025-03-17 12:07:08,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:07:08,029 INFO L225 Difference]: With dead ends: 105 [2025-03-17 12:07:08,029 INFO L226 Difference]: Without dead ends: 105 [2025-03-17 12:07:08,029 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-17 12:07:08,029 INFO L435 NwaCegarLoop]: 66 mSDtfsCounter, 4 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-17 12:07:08,029 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 181 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-17 12:07:08,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2025-03-17 12:07:08,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2025-03-17 12:07:08,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 76 states have (on average 1.736842105263158) internal successors, (132), 104 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:08,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 132 transitions. [2025-03-17 12:07:08,031 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 132 transitions. Word has length 12 [2025-03-17 12:07:08,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:07:08,031 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 132 transitions. [2025-03-17 12:07:08,032 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:08,032 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 132 transitions. [2025-03-17 12:07:08,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2025-03-17 12:07:08,033 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:07:08,033 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 12:07:08,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-17 12:07:08,233 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 [2025-03-17 12:07:08,234 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 42 more)] === [2025-03-17 12:07:08,234 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:07:08,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1343235963, now seen corresponding path program 1 times [2025-03-17 12:07:08,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-17 12:07:08,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2014726062] [2025-03-17 12:07:08,234 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 12:07:08,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:07:08,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:07:08,236 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) [2025-03-17 12:07:08,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-17 12:07:08,284 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-17 12:07:08,293 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-17 12:07:08,293 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:07:08,293 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:07:08,295 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-17 12:07:08,296 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:07:08,303 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 [2025-03-17 12:07:08,315 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 8 treesize of output 1 [2025-03-17 12:07:08,413 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 [2025-03-17 12:07:08,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 12:07:08,438 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 12:07:08,438 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-17 12:07:08,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014726062] [2025-03-17 12:07:08,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014726062] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 12:07:08,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 12:07:08,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-17 12:07:08,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823559083] [2025-03-17 12:07:08,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 12:07:08,438 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-17 12:07:08,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-17 12:07:08,439 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-17 12:07:08,439 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2025-03-17 12:07:08,439 INFO L87 Difference]: Start difference. First operand 105 states and 132 transitions. Second operand has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:09,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:07:09,127 INFO L93 Difference]: Finished difference Result 161 states and 208 transitions. [2025-03-17 12:07:09,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 12:07:09,127 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2025-03-17 12:07:09,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:07:09,129 INFO L225 Difference]: With dead ends: 161 [2025-03-17 12:07:09,129 INFO L226 Difference]: Without dead ends: 161 [2025-03-17 12:07:09,129 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2025-03-17 12:07:09,129 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 78 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-17 12:07:09,129 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 182 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-17 12:07:09,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2025-03-17 12:07:09,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 133. [2025-03-17 12:07:09,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 104 states have (on average 1.8269230769230769) internal successors, (190), 132 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:09,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 190 transitions. [2025-03-17 12:07:09,133 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 190 transitions. Word has length 13 [2025-03-17 12:07:09,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:07:09,133 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 190 transitions. [2025-03-17 12:07:09,133 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:09,133 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 190 transitions. [2025-03-17 12:07:09,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2025-03-17 12:07:09,133 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:07:09,134 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 12:07:09,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-17 12:07:09,334 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 [2025-03-17 12:07:09,334 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 42 more)] === [2025-03-17 12:07:09,335 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:07:09,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1343235964, now seen corresponding path program 1 times [2025-03-17 12:07:09,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-17 12:07:09,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [325216894] [2025-03-17 12:07:09,335 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 12:07:09,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:07:09,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:07:09,337 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) [2025-03-17 12:07:09,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-17 12:07:09,384 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-17 12:07:09,400 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-17 12:07:09,400 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:07:09,400 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:07:09,402 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-17 12:07:09,405 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:07:09,409 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 [2025-03-17 12:07:09,428 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 8 treesize of output 1 [2025-03-17 12:07:09,432 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 8 treesize of output 1 [2025-03-17 12:07:09,598 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 [2025-03-17 12:07:09,602 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 [2025-03-17 12:07:09,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 12:07:09,637 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 12:07:09,637 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-17 12:07:09,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325216894] [2025-03-17 12:07:09,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325216894] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 12:07:09,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 12:07:09,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-17 12:07:09,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083398613] [2025-03-17 12:07:09,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 12:07:09,639 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-17 12:07:09,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-17 12:07:09,640 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-17 12:07:09,640 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2025-03-17 12:07:09,640 INFO L87 Difference]: Start difference. First operand 133 states and 190 transitions. Second operand has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:10,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:07:10,258 INFO L93 Difference]: Finished difference Result 145 states and 188 transitions. [2025-03-17 12:07:10,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 12:07:10,258 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2025-03-17 12:07:10,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:07:10,259 INFO L225 Difference]: With dead ends: 145 [2025-03-17 12:07:10,259 INFO L226 Difference]: Without dead ends: 145 [2025-03-17 12:07:10,259 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2025-03-17 12:07:10,259 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 39 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-17 12:07:10,259 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 204 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-17 12:07:10,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2025-03-17 12:07:10,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 133. [2025-03-17 12:07:10,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 104 states have (on average 1.8076923076923077) internal successors, (188), 132 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:10,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 188 transitions. [2025-03-17 12:07:10,262 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 188 transitions. Word has length 13 [2025-03-17 12:07:10,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:07:10,262 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 188 transitions. [2025-03-17 12:07:10,263 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:10,263 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 188 transitions. [2025-03-17 12:07:10,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-03-17 12:07:10,264 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:07:10,264 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 12:07:10,272 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-17 12:07:10,464 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 [2025-03-17 12:07:10,465 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 42 more)] === [2025-03-17 12:07:10,465 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:07:10,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1956376052, now seen corresponding path program 1 times [2025-03-17 12:07:10,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-17 12:07:10,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [991287888] [2025-03-17 12:07:10,466 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 12:07:10,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:07:10,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:07:10,468 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) [2025-03-17 12:07:10,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-17 12:07:10,528 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-17 12:07:10,559 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-17 12:07:10,559 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:07:10,560 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:07:10,564 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-17 12:07:10,566 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:07:10,578 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 [2025-03-17 12:07:10,597 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 [2025-03-17 12:07:10,638 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-03-17 12:07:10,638 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 [2025-03-17 12:07:10,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-17 12:07:10,707 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 [2025-03-17 12:07:10,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 12:07:10,739 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 12:07:10,739 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-17 12:07:10,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991287888] [2025-03-17 12:07:10,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991287888] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 12:07:10,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 12:07:10,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-17 12:07:10,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102675082] [2025-03-17 12:07:10,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 12:07:10,740 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-17 12:07:10,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-17 12:07:10,740 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-17 12:07:10,740 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2025-03-17 12:07:10,740 INFO L87 Difference]: Start difference. First operand 133 states and 188 transitions. Second operand has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:11,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:07:11,200 INFO L93 Difference]: Finished difference Result 141 states and 197 transitions. [2025-03-17 12:07:11,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 12:07:11,200 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2025-03-17 12:07:11,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:07:11,201 INFO L225 Difference]: With dead ends: 141 [2025-03-17 12:07:11,201 INFO L226 Difference]: Without dead ends: 141 [2025-03-17 12:07:11,201 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2025-03-17 12:07:11,201 INFO L435 NwaCegarLoop]: 61 mSDtfsCounter, 23 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-17 12:07:11,201 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 341 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-17 12:07:11,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2025-03-17 12:07:11,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2025-03-17 12:07:11,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 112 states have (on average 1.7589285714285714) internal successors, (197), 140 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:11,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 197 transitions. [2025-03-17 12:07:11,204 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 197 transitions. Word has length 14 [2025-03-17 12:07:11,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:07:11,204 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 197 transitions. [2025-03-17 12:07:11,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:11,204 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 197 transitions. [2025-03-17 12:07:11,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-03-17 12:07:11,205 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:07:11,205 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 12:07:11,212 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-03-17 12:07:11,405 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 [2025-03-17 12:07:11,405 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 42 more)] === [2025-03-17 12:07:11,406 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:07:11,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1956376053, now seen corresponding path program 1 times [2025-03-17 12:07:11,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-17 12:07:11,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [675796768] [2025-03-17 12:07:11,406 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 12:07:11,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:07:11,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:07:11,411 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) [2025-03-17 12:07:11,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-17 12:07:11,471 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-17 12:07:11,506 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-17 12:07:11,506 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:07:11,506 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:07:11,510 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-17 12:07:11,512 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:07:11,522 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 [2025-03-17 12:07:11,528 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 [2025-03-17 12:07:11,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-17 12:07:11,557 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 [2025-03-17 12:07:11,656 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-03-17 12:07:11,659 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 [2025-03-17 12:07:11,678 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-03-17 12:07:11,679 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 [2025-03-17 12:07:11,701 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-17 12:07:11,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-17 12:07:11,754 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 [2025-03-17 12:07:11,759 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 [2025-03-17 12:07:11,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 12:07:11,805 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 12:07:11,805 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-17 12:07:11,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675796768] [2025-03-17 12:07:11,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675796768] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 12:07:11,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 12:07:11,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-17 12:07:11,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349096699] [2025-03-17 12:07:11,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 12:07:11,805 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-17 12:07:11,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-17 12:07:11,806 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-17 12:07:11,806 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2025-03-17 12:07:11,806 INFO L87 Difference]: Start difference. First operand 141 states and 197 transitions. Second operand has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:12,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:07:12,373 INFO L93 Difference]: Finished difference Result 141 states and 196 transitions. [2025-03-17 12:07:12,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 12:07:12,377 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2025-03-17 12:07:12,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:07:12,377 INFO L225 Difference]: With dead ends: 141 [2025-03-17 12:07:12,377 INFO L226 Difference]: Without dead ends: 141 [2025-03-17 12:07:12,377 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2025-03-17 12:07:12,378 INFO L435 NwaCegarLoop]: 61 mSDtfsCounter, 26 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-17 12:07:12,378 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 233 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-17 12:07:12,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2025-03-17 12:07:12,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2025-03-17 12:07:12,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 112 states have (on average 1.75) internal successors, (196), 140 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:12,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 196 transitions. [2025-03-17 12:07:12,381 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 196 transitions. Word has length 14 [2025-03-17 12:07:12,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:07:12,382 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 196 transitions. [2025-03-17 12:07:12,382 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:12,383 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 196 transitions. [2025-03-17 12:07:12,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-03-17 12:07:12,383 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:07:12,383 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 12:07:12,390 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-03-17 12:07:12,583 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 [2025-03-17 12:07:12,584 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 42 more)] === [2025-03-17 12:07:12,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:07:12,584 INFO L85 PathProgramCache]: Analyzing trace with hash 132287757, now seen corresponding path program 1 times [2025-03-17 12:07:12,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-17 12:07:12,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1315788294] [2025-03-17 12:07:12,585 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 12:07:12,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:07:12,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:07:12,587 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) [2025-03-17 12:07:12,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-17 12:07:12,651 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-17 12:07:12,663 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-17 12:07:12,663 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:07:12,663 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:07:12,665 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-17 12:07:12,666 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:07:12,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 12:07:12,676 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 12:07:12,676 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-17 12:07:12,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315788294] [2025-03-17 12:07:12,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315788294] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 12:07:12,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 12:07:12,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 12:07:12,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031150623] [2025-03-17 12:07:12,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 12:07:12,676 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 12:07:12,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-17 12:07:12,677 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 12:07:12,677 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 12:07:12,677 INFO L87 Difference]: Start difference. First operand 141 states and 196 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:12,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:07:12,937 INFO L93 Difference]: Finished difference Result 147 states and 182 transitions. [2025-03-17 12:07:12,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 12:07:12,938 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2025-03-17 12:07:12,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:07:12,938 INFO L225 Difference]: With dead ends: 147 [2025-03-17 12:07:12,938 INFO L226 Difference]: Without dead ends: 147 [2025-03-17 12:07:12,938 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-17 12:07:12,939 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 42 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-17 12:07:12,939 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 109 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-17 12:07:12,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2025-03-17 12:07:12,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 138. [2025-03-17 12:07:12,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 112 states have (on average 1.625) internal successors, (182), 137 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:12,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 182 transitions. [2025-03-17 12:07:12,942 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 182 transitions. Word has length 16 [2025-03-17 12:07:12,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:07:12,942 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 182 transitions. [2025-03-17 12:07:12,942 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:12,942 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 182 transitions. [2025-03-17 12:07:12,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-03-17 12:07:12,943 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:07:12,943 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 12:07:12,955 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-03-17 12:07:13,143 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 [2025-03-17 12:07:13,144 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 42 more)] === [2025-03-17 12:07:13,144 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:07:13,144 INFO L85 PathProgramCache]: Analyzing trace with hash 132287758, now seen corresponding path program 1 times [2025-03-17 12:07:13,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-17 12:07:13,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [452501936] [2025-03-17 12:07:13,144 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 12:07:13,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:07:13,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:07:13,146 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) [2025-03-17 12:07:13,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-17 12:07:13,206 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-17 12:07:13,222 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-17 12:07:13,223 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:07:13,223 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:07:13,226 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-17 12:07:13,228 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:07:13,231 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 8 treesize of output 1 [2025-03-17 12:07:13,232 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 8 treesize of output 1 [2025-03-17 12:07:13,330 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 [2025-03-17 12:07:13,336 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 [2025-03-17 12:07:13,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 12:07:13,369 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 12:07:13,369 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-17 12:07:13,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452501936] [2025-03-17 12:07:13,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452501936] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 12:07:13,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 12:07:13,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-17 12:07:13,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026040967] [2025-03-17 12:07:13,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 12:07:13,369 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 12:07:13,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-17 12:07:13,370 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 12:07:13,370 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-03-17 12:07:13,370 INFO L87 Difference]: Start difference. First operand 138 states and 182 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:13,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:07:13,705 INFO L93 Difference]: Finished difference Result 115 states and 136 transitions. [2025-03-17 12:07:13,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 12:07:13,708 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2025-03-17 12:07:13,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:07:13,709 INFO L225 Difference]: With dead ends: 115 [2025-03-17 12:07:13,709 INFO L226 Difference]: Without dead ends: 115 [2025-03-17 12:07:13,709 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2025-03-17 12:07:13,710 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 16 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-17 12:07:13,710 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 280 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-17 12:07:13,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2025-03-17 12:07:13,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2025-03-17 12:07:13,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 86 states have (on average 1.5232558139534884) internal successors, (131), 111 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:13,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 131 transitions. [2025-03-17 12:07:13,712 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 131 transitions. Word has length 16 [2025-03-17 12:07:13,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:07:13,712 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 131 transitions. [2025-03-17 12:07:13,713 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:13,713 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 131 transitions. [2025-03-17 12:07:13,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-03-17 12:07:13,714 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:07:13,714 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 12:07:13,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2025-03-17 12:07:13,914 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 [2025-03-17 12:07:13,914 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 42 more)] === [2025-03-17 12:07:13,915 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:07:13,915 INFO L85 PathProgramCache]: Analyzing trace with hash -194046824, now seen corresponding path program 1 times [2025-03-17 12:07:13,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-17 12:07:13,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1675782322] [2025-03-17 12:07:13,915 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 12:07:13,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:07:13,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:07:13,917 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) [2025-03-17 12:07:13,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-17 12:07:13,975 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-17 12:07:14,008 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-17 12:07:14,009 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:07:14,009 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:07:14,011 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-17 12:07:14,012 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:07:14,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 12:07:14,057 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 12:07:14,057 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-17 12:07:14,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675782322] [2025-03-17 12:07:14,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675782322] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 12:07:14,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 12:07:14,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 12:07:14,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439568397] [2025-03-17 12:07:14,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 12:07:14,058 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 12:07:14,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-17 12:07:14,058 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 12:07:14,058 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-17 12:07:14,058 INFO L87 Difference]: Start difference. First operand 112 states and 131 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:14,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:07:14,139 INFO L93 Difference]: Finished difference Result 111 states and 129 transitions. [2025-03-17 12:07:14,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 12:07:14,140 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2025-03-17 12:07:14,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:07:14,140 INFO L225 Difference]: With dead ends: 111 [2025-03-17 12:07:14,140 INFO L226 Difference]: Without dead ends: 111 [2025-03-17 12:07:14,140 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-17 12:07:14,141 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 51 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 12:07:14,141 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 167 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 12:07:14,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2025-03-17 12:07:14,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2025-03-17 12:07:14,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 86 states have (on average 1.5) internal successors, (129), 110 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:14,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 129 transitions. [2025-03-17 12:07:14,143 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 129 transitions. Word has length 17 [2025-03-17 12:07:14,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:07:14,143 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 129 transitions. [2025-03-17 12:07:14,143 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:14,143 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 129 transitions. [2025-03-17 12:07:14,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-03-17 12:07:14,143 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:07:14,143 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 12:07:14,151 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-03-17 12:07:14,348 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 [2025-03-17 12:07:14,348 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 42 more)] === [2025-03-17 12:07:14,348 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:07:14,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1795405034, now seen corresponding path program 1 times [2025-03-17 12:07:14,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-17 12:07:14,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [309475775] [2025-03-17 12:07:14,350 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 12:07:14,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:07:14,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:07:14,352 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) [2025-03-17 12:07:14,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-03-17 12:07:14,412 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-17 12:07:14,427 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 12:07:14,428 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:07:14,428 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:07:14,430 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 12:07:14,436 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:07:14,527 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_destroy_~head#1.base_13| (_ BitVec 64))) (and (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_destroy_~head#1.base_13|)) (= |c_#valid| (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_destroy_~head#1.base_13| (_ bv0 1))))) is different from true [2025-03-17 12:07:14,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 12:07:14,528 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 12:07:14,528 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-17 12:07:14,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309475775] [2025-03-17 12:07:14,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309475775] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 12:07:14,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 12:07:14,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 12:07:14,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385258186] [2025-03-17 12:07:14,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 12:07:14,528 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 12:07:14,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-17 12:07:14,529 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 12:07:14,529 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=14, Unknown=1, NotChecked=6, Total=30 [2025-03-17 12:07:14,529 INFO L87 Difference]: Start difference. First operand 111 states and 129 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:14,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:07:14,810 INFO L93 Difference]: Finished difference Result 114 states and 131 transitions. [2025-03-17 12:07:14,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 12:07:14,811 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2025-03-17 12:07:14,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:07:14,811 INFO L225 Difference]: With dead ends: 114 [2025-03-17 12:07:14,811 INFO L226 Difference]: Without dead ends: 101 [2025-03-17 12:07:14,811 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=14, Unknown=1, NotChecked=6, Total=30 [2025-03-17 12:07:14,811 INFO L435 NwaCegarLoop]: 60 mSDtfsCounter, 0 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-17 12:07:14,812 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 158 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 122 Invalid, 0 Unknown, 85 Unchecked, 0.3s Time] [2025-03-17 12:07:14,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2025-03-17 12:07:14,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2025-03-17 12:07:14,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 76 states have (on average 1.5526315789473684) internal successors, (118), 100 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:14,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 118 transitions. [2025-03-17 12:07:14,825 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 118 transitions. Word has length 19 [2025-03-17 12:07:14,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:07:14,825 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 118 transitions. [2025-03-17 12:07:14,825 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:14,825 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 118 transitions. [2025-03-17 12:07:14,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-03-17 12:07:14,825 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:07:14,825 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 12:07:14,834 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2025-03-17 12:07:15,026 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 [2025-03-17 12:07:15,026 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 42 more)] === [2025-03-17 12:07:15,026 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:07:15,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1122973350, now seen corresponding path program 1 times [2025-03-17 12:07:15,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-17 12:07:15,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [461874494] [2025-03-17 12:07:15,027 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 12:07:15,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:07:15,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:07:15,029 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) [2025-03-17 12:07:15,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-03-17 12:07:15,091 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-17 12:07:15,122 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 12:07:15,123 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:07:15,123 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:07:15,130 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-17 12:07:15,131 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:07:15,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 12:07:15,211 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 12:07:15,211 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-17 12:07:15,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461874494] [2025-03-17 12:07:15,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461874494] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 12:07:15,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 12:07:15,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 12:07:15,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102662150] [2025-03-17 12:07:15,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 12:07:15,211 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 12:07:15,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-17 12:07:15,212 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 12:07:15,212 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-17 12:07:15,212 INFO L87 Difference]: Start difference. First operand 101 states and 118 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:15,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:07:15,510 INFO L93 Difference]: Finished difference Result 100 states and 117 transitions. [2025-03-17 12:07:15,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 12:07:15,511 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2025-03-17 12:07:15,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:07:15,511 INFO L225 Difference]: With dead ends: 100 [2025-03-17 12:07:15,511 INFO L226 Difference]: Without dead ends: 100 [2025-03-17 12:07:15,512 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2025-03-17 12:07:15,512 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 15 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-17 12:07:15,512 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 160 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-17 12:07:15,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2025-03-17 12:07:15,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2025-03-17 12:07:15,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 76 states have (on average 1.5394736842105263) internal successors, (117), 99 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:15,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 117 transitions. [2025-03-17 12:07:15,514 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 117 transitions. Word has length 19 [2025-03-17 12:07:15,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:07:15,514 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 117 transitions. [2025-03-17 12:07:15,514 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:15,514 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 117 transitions. [2025-03-17 12:07:15,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2025-03-17 12:07:15,514 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:07:15,514 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 12:07:15,522 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2025-03-17 12:07:15,715 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 [2025-03-17 12:07:15,715 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 42 more)] === [2025-03-17 12:07:15,715 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:07:15,715 INFO L85 PathProgramCache]: Analyzing trace with hash 998796146, now seen corresponding path program 1 times [2025-03-17 12:07:15,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-17 12:07:15,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [689688910] [2025-03-17 12:07:15,716 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 12:07:15,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:07:15,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:07:15,717 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) [2025-03-17 12:07:15,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-03-17 12:07:15,785 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-17 12:07:15,816 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 12:07:15,816 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:07:15,816 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:07:15,821 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-17 12:07:15,822 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:07:15,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 12:07:15,912 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 12:07:15,913 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-17 12:07:15,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689688910] [2025-03-17 12:07:15,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689688910] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 12:07:15,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 12:07:15,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 12:07:15,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752174691] [2025-03-17 12:07:15,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 12:07:15,913 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 12:07:15,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-17 12:07:15,913 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 12:07:15,913 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-17 12:07:15,913 INFO L87 Difference]: Start difference. First operand 100 states and 117 transitions. Second operand has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:16,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:07:16,212 INFO L93 Difference]: Finished difference Result 98 states and 113 transitions. [2025-03-17 12:07:16,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 12:07:16,213 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2025-03-17 12:07:16,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:07:16,213 INFO L225 Difference]: With dead ends: 98 [2025-03-17 12:07:16,213 INFO L226 Difference]: Without dead ends: 98 [2025-03-17 12:07:16,213 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-03-17 12:07:16,213 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 49 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-17 12:07:16,214 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 121 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-17 12:07:16,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2025-03-17 12:07:16,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2025-03-17 12:07:16,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 76 states have (on average 1.486842105263158) internal successors, (113), 97 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:16,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 113 transitions. [2025-03-17 12:07:16,215 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 113 transitions. Word has length 22 [2025-03-17 12:07:16,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:07:16,215 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 113 transitions. [2025-03-17 12:07:16,215 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:16,215 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 113 transitions. [2025-03-17 12:07:16,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2025-03-17 12:07:16,215 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:07:16,215 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 12:07:16,225 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2025-03-17 12:07:16,416 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 [2025-03-17 12:07:16,416 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 42 more)] === [2025-03-17 12:07:16,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:07:16,416 INFO L85 PathProgramCache]: Analyzing trace with hash 998796305, now seen corresponding path program 1 times [2025-03-17 12:07:16,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-17 12:07:16,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [314360928] [2025-03-17 12:07:16,417 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 12:07:16,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:07:16,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:07:16,418 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) [2025-03-17 12:07:16,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-03-17 12:07:16,485 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-17 12:07:16,518 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 12:07:16,518 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:07:16,518 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:07:16,524 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 36 conjuncts are in the unsatisfiable core [2025-03-17 12:07:16,526 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:07:16,548 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 [2025-03-17 12:07:16,555 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 [2025-03-17 12:07:16,594 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-03-17 12:07:16,594 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 [2025-03-17 12:07:16,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-17 12:07:16,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-17 12:07:16,676 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-17 12:07:16,680 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-17 12:07:16,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-17 12:07:16,799 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 [2025-03-17 12:07:16,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 12:07:16,822 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 12:07:16,871 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 36 treesize of output 32 [2025-03-17 12:07:17,333 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 12:07:17,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2025-03-17 12:07:17,336 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 36 treesize of output 24 [2025-03-17 12:07:17,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2025-03-17 12:07:17,342 INFO L349 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2025-03-17 12:07:17,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 1 [2025-03-17 12:07:20,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 12:07:20,819 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-17 12:07:20,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314360928] [2025-03-17 12:07:20,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314360928] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 12:07:20,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-17 12:07:20,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2025-03-17 12:07:20,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039038592] [2025-03-17 12:07:20,819 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-17 12:07:20,819 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-17 12:07:20,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-17 12:07:20,820 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-17 12:07:20,820 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=505, Unknown=19, NotChecked=0, Total=600 [2025-03-17 12:07:20,820 INFO L87 Difference]: Start difference. First operand 98 states and 113 transitions. Second operand has 25 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:22,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:07:22,224 INFO L93 Difference]: Finished difference Result 112 states and 131 transitions. [2025-03-17 12:07:22,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-17 12:07:22,225 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2025-03-17 12:07:22,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:07:22,225 INFO L225 Difference]: With dead ends: 112 [2025-03-17 12:07:22,225 INFO L226 Difference]: Without dead ends: 112 [2025-03-17 12:07:22,226 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=186, Invalid=982, Unknown=22, NotChecked=0, Total=1190 [2025-03-17 12:07:22,226 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 58 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2025-03-17 12:07:22,226 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 516 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2025-03-17 12:07:22,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2025-03-17 12:07:22,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 106. [2025-03-17 12:07:22,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 84 states have (on average 1.4761904761904763) internal successors, (124), 105 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:22,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 124 transitions. [2025-03-17 12:07:22,228 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 124 transitions. Word has length 22 [2025-03-17 12:07:22,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:07:22,228 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 124 transitions. [2025-03-17 12:07:22,228 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:22,228 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 124 transitions. [2025-03-17 12:07:22,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2025-03-17 12:07:22,229 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:07:22,229 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 12:07:22,238 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2025-03-17 12:07:22,429 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 [2025-03-17 12:07:22,430 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 42 more)] === [2025-03-17 12:07:22,430 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:07:22,430 INFO L85 PathProgramCache]: Analyzing trace with hash 998796306, now seen corresponding path program 1 times [2025-03-17 12:07:22,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-17 12:07:22,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [435512861] [2025-03-17 12:07:22,431 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 12:07:22,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:07:22,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:07:22,433 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) [2025-03-17 12:07:22,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2025-03-17 12:07:22,516 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-17 12:07:22,565 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 12:07:22,565 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:07:22,565 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:07:22,571 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 51 conjuncts are in the unsatisfiable core [2025-03-17 12:07:22,573 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:07:22,580 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 [2025-03-17 12:07:22,597 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 [2025-03-17 12:07:22,607 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 [2025-03-17 12:07:22,657 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 [2025-03-17 12:07:22,670 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-03-17 12:07:22,670 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 [2025-03-17 12:07:22,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-17 12:07:22,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-17 12:07:22,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-17 12:07:22,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-17 12:07:22,958 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 [2025-03-17 12:07:22,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-17 12:07:23,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2025-03-17 12:07:23,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2025-03-17 12:07:23,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 12:07:23,148 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 12:07:23,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 56 [2025-03-17 12:07:23,681 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 90 treesize of output 82 [2025-03-17 12:07:23,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2025-03-17 12:07:24,514 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd (_ bv8 64) |c_ULTIMATE.start_create_~ptr~0#1.offset|)) (.cse0 (bvadd (_ bv8 64) |c_ULTIMATE.start_create_~head~0#1.offset|))) (and (forall ((v_ArrVal_776 (Array (_ BitVec 64) (_ BitVec 64)))) (= (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_create_~ptr~0#1.base| v_ArrVal_776) |c_ULTIMATE.start_create_~head~0#1.base|) .cse0) |c_ULTIMATE.start_create_~head~0#1.offset|)) (bvule .cse1 (select |c_#length| |c_ULTIMATE.start_create_~ptr~0#1.base|)) (bvule |c_ULTIMATE.start_create_~ptr~0#1.offset| .cse1) (forall ((v_ArrVal_777 (Array (_ BitVec 64) (_ BitVec 64)))) (= (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_~ptr~0#1.base| v_ArrVal_777) |c_ULTIMATE.start_create_~head~0#1.base|) .cse0) |c_ULTIMATE.start_create_~head~0#1.base|)))) is different from false [2025-03-17 12:07:24,553 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd (_ bv8 64) |c_ULTIMATE.start_create_~head~0#1.offset|))) (and (forall ((|v_ULTIMATE.start_create_~ptr~0#1.base_17| (_ BitVec 64))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_create_~ptr~0#1.base_17|))) (forall ((v_ArrVal_776 (Array (_ BitVec 64) (_ BitVec 64)))) (= (select (select (store |c_#memory_$Pointer$#0.offset| |v_ULTIMATE.start_create_~ptr~0#1.base_17| v_ArrVal_776) |c_ULTIMATE.start_create_~head~0#1.base|) .cse0) |c_ULTIMATE.start_create_~head~0#1.offset|)))) (forall ((|v_ULTIMATE.start_create_~ptr~0#1.base_17| (_ BitVec 64))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_create_~ptr~0#1.base_17|))) (forall ((v_ArrVal_777 (Array (_ BitVec 64) (_ BitVec 64)))) (= |c_ULTIMATE.start_create_~head~0#1.base| (select (select (store |c_#memory_$Pointer$#0.base| |v_ULTIMATE.start_create_~ptr~0#1.base_17| v_ArrVal_777) |c_ULTIMATE.start_create_~head~0#1.base|) .cse0))))))) is different from false [2025-03-17 12:07:24,627 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 12:07:24,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2025-03-17 12:07:24,630 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 36 treesize of output 24 [2025-03-17 12:07:24,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2025-03-17 12:07:24,639 INFO L349 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2025-03-17 12:07:24,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 1 [2025-03-17 12:07:24,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2025-03-17 12:07:24,702 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-17 12:07:24,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435512861] [2025-03-17 12:07:24,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435512861] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 12:07:24,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-17 12:07:24,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 21 [2025-03-17 12:07:24,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99284113] [2025-03-17 12:07:24,702 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-17 12:07:24,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-17 12:07:24,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-17 12:07:24,702 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-17 12:07:24,703 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=372, Unknown=2, NotChecked=78, Total=506 [2025-03-17 12:07:24,703 INFO L87 Difference]: Start difference. First operand 106 states and 124 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:28,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:07:28,366 INFO L93 Difference]: Finished difference Result 112 states and 130 transitions. [2025-03-17 12:07:28,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-17 12:07:28,367 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2025-03-17 12:07:28,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:07:28,367 INFO L225 Difference]: With dead ends: 112 [2025-03-17 12:07:28,367 INFO L226 Difference]: Without dead ends: 112 [2025-03-17 12:07:28,368 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=123, Invalid=813, Unknown=2, NotChecked=118, Total=1056 [2025-03-17 12:07:28,368 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 45 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2025-03-17 12:07:28,368 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 511 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 552 Invalid, 0 Unknown, 130 Unchecked, 2.7s Time] [2025-03-17 12:07:28,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2025-03-17 12:07:28,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 106. [2025-03-17 12:07:28,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 84 states have (on average 1.4642857142857142) internal successors, (123), 105 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:28,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 123 transitions. [2025-03-17 12:07:28,370 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 123 transitions. Word has length 22 [2025-03-17 12:07:28,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:07:28,370 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 123 transitions. [2025-03-17 12:07:28,370 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:28,370 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 123 transitions. [2025-03-17 12:07:28,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-03-17 12:07:28,370 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:07:28,370 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 12:07:28,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2025-03-17 12:07:28,570 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 [2025-03-17 12:07:28,571 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 42 more)] === [2025-03-17 12:07:28,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:07:28,571 INFO L85 PathProgramCache]: Analyzing trace with hash 2065388815, now seen corresponding path program 1 times [2025-03-17 12:07:28,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-17 12:07:28,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2041910703] [2025-03-17 12:07:28,572 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 12:07:28,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:07:28,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:07:28,574 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) [2025-03-17 12:07:28,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2025-03-17 12:07:28,647 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-17 12:07:28,680 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 12:07:28,680 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:07:28,681 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:07:28,685 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-03-17 12:07:28,690 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:07:28,897 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 [2025-03-17 12:07:28,900 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 [2025-03-17 12:07:28,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 12:07:28,939 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 12:07:28,939 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-17 12:07:28,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041910703] [2025-03-17 12:07:28,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041910703] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 12:07:28,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 12:07:28,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 12:07:28,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759553214] [2025-03-17 12:07:28,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 12:07:28,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-17 12:07:28,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-17 12:07:28,940 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-17 12:07:28,940 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2025-03-17 12:07:28,940 INFO L87 Difference]: Start difference. First operand 106 states and 123 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:29,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:07:29,516 INFO L93 Difference]: Finished difference Result 108 states and 126 transitions. [2025-03-17 12:07:29,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 12:07:29,516 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2025-03-17 12:07:29,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:07:29,516 INFO L225 Difference]: With dead ends: 108 [2025-03-17 12:07:29,517 INFO L226 Difference]: Without dead ends: 108 [2025-03-17 12:07:29,517 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2025-03-17 12:07:29,517 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 23 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-17 12:07:29,517 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 245 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-17 12:07:29,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2025-03-17 12:07:29,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2025-03-17 12:07:29,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 84 states have (on average 1.4523809523809523) internal successors, (122), 105 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:29,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 122 transitions. [2025-03-17 12:07:29,519 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 122 transitions. Word has length 24 [2025-03-17 12:07:29,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:07:29,519 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 122 transitions. [2025-03-17 12:07:29,519 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:07:29,519 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 122 transitions. [2025-03-17 12:07:29,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-03-17 12:07:29,519 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:07:29,519 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 12:07:29,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2025-03-17 12:07:29,719 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 [2025-03-17 12:07:29,720 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 42 more)] === [2025-03-17 12:07:29,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:07:29,720 INFO L85 PathProgramCache]: Analyzing trace with hash -392684448, now seen corresponding path program 1 times [2025-03-17 12:07:29,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-17 12:07:29,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [765320674] [2025-03-17 12:07:29,720 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 12:07:29,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:07:29,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:07:29,722 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) [2025-03-17 12:07:29,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2025-03-17 12:07:29,796 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-17 12:07:29,830 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-17 12:07:29,830 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:07:29,830 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:07:29,834 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 55 conjuncts are in the unsatisfiable core [2025-03-17 12:07:29,836 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:07:29,865 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 [2025-03-17 12:07:29,871 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 [2025-03-17 12:07:29,919 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-03-17 12:07:29,919 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 [2025-03-17 12:07:29,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-17 12:07:29,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-17 12:07:30,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-17 12:07:30,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-17 12:07:30,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-17 12:07:30,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2025-03-17 12:07:30,223 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 [2025-03-17 12:07:30,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2025-03-17 12:07:30,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2025-03-17 12:07:30,490 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2025-03-17 12:07:30,490 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 31 treesize of output 14 [2025-03-17 12:07:30,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 12:07:30,542 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 12:07:30,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 80 [2025-03-17 12:07:39,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 12:07:39,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 12:07:40,397 INFO L349 Elim1Store]: treesize reduction 99, result has 63.7 percent of original size [2025-03-17 12:07:40,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 177522 treesize of output 170659