./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing.i -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6efa0097353392a416215c2535cfc6cdc34364d9b0eb2844e37da9edef467642 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 12:59:18,297 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 12:59:18,355 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-06 12:59:18,361 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 12:59:18,362 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 12:59:18,390 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 12:59:18,390 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 12:59:18,391 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 12:59:18,391 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 12:59:18,391 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 12:59:18,394 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 12:59:18,395 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 12:59:18,395 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 12:59:18,395 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 12:59:18,395 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 12:59:18,395 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 12:59:18,395 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 12:59:18,395 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 12:59:18,395 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 12:59:18,395 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 12:59:18,395 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-06 12:59:18,395 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-06 12:59:18,395 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-06 12:59:18,395 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 12:59:18,395 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-06 12:59:18,395 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-06 12:59:18,395 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 12:59:18,396 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 12:59:18,396 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 12:59:18,396 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 12:59:18,396 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 12:59:18,396 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 12:59:18,396 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 12:59:18,396 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 12:59:18,396 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 12:59:18,396 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 12:59:18,396 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 12:59:18,396 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 12:59:18,396 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 12:59:18,396 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 12:59:18,396 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 12:59:18,396 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 12:59:18,396 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6efa0097353392a416215c2535cfc6cdc34364d9b0eb2844e37da9edef467642 [2025-02-06 12:59:18,657 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 12:59:18,667 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 12:59:18,671 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 12:59:18,672 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 12:59:18,672 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 12:59:18,674 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing.i [2025-02-06 12:59:19,873 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/326a6567e/cae61ea3b2ff4c2a9a562eeadc3cd70f/FLAGde663cf9a [2025-02-06 12:59:20,216 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 12:59:20,217 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing.i [2025-02-06 12:59:20,236 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/326a6567e/cae61ea3b2ff4c2a9a562eeadc3cd70f/FLAGde663cf9a [2025-02-06 12:59:20,253 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/326a6567e/cae61ea3b2ff4c2a9a562eeadc3cd70f [2025-02-06 12:59:20,255 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 12:59:20,257 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 12:59:20,258 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 12:59:20,258 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 12:59:20,263 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 12:59:20,264 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 12:59:20" (1/1) ... [2025-02-06 12:59:20,266 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b3645f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:20, skipping insertion in model container [2025-02-06 12:59:20,266 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 12:59:20" (1/1) ... [2025-02-06 12:59:20,301 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 12:59:20,583 WARN L1731 CHandler]: Possible shadowing of function new [2025-02-06 12:59:20,584 WARN L1731 CHandler]: Possible shadowing of function new [2025-02-06 12:59:20,584 WARN L1731 CHandler]: Possible shadowing of function new [2025-02-06 12:59:20,585 WARN L1731 CHandler]: Possible shadowing of function new [2025-02-06 12:59:20,625 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 12:59:20,683 ERROR L321 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2025-02-06 12:59:20,687 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@41936e17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:20, skipping insertion in model container [2025-02-06 12:59:20,688 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 12:59:20,688 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2025-02-06 12:59:20,689 INFO L158 Benchmark]: Toolchain (without parser) took 432.22ms. Allocated memory is still 167.8MB. Free memory was 130.9MB in the beginning and 114.0MB in the end (delta: 16.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-02-06 12:59:20,689 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 226.5MB. Free memory is still 140.0MB. There was no memory consumed. Max. memory is 16.1GB. [2025-02-06 12:59:20,690 INFO L158 Benchmark]: CACSL2BoogieTranslator took 429.80ms. Allocated memory is still 167.8MB. Free memory was 130.9MB in the beginning and 114.0MB in the end (delta: 16.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-02-06 12:59:20,690 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 226.5MB. Free memory is still 140.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 429.80ms. Allocated memory is still 167.8MB. Free memory was 130.9MB in the beginning and 114.0MB in the end (delta: 16.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1051]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing.i -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6efa0097353392a416215c2535cfc6cdc34364d9b0eb2844e37da9edef467642 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 12:59:22,811 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 12:59:22,924 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2025-02-06 12:59:22,937 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 12:59:22,937 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 12:59:22,959 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 12:59:22,960 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 12:59:22,961 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 12:59:22,961 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 12:59:22,961 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 12:59:22,962 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 12:59:22,962 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 12:59:22,962 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 12:59:22,963 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 12:59:22,963 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 12:59:22,963 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 12:59:22,963 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 12:59:22,963 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 12:59:22,963 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 12:59:22,963 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 12:59:22,963 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-06 12:59:22,963 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-06 12:59:22,963 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-06 12:59:22,964 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 12:59:22,964 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-06 12:59:22,964 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2025-02-06 12:59:22,964 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2025-02-06 12:59:22,964 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-06 12:59:22,964 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 12:59:22,964 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 12:59:22,965 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 12:59:22,965 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 12:59:22,965 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 12:59:22,965 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 12:59:22,965 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 12:59:22,965 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 12:59:22,965 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 12:59:22,965 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 12:59:22,966 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2025-02-06 12:59:22,966 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2025-02-06 12:59:22,966 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 12:59:22,966 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 12:59:22,966 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 12:59:22,966 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 12:59:22,966 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6efa0097353392a416215c2535cfc6cdc34364d9b0eb2844e37da9edef467642 [2025-02-06 12:59:23,232 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 12:59:23,240 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 12:59:23,242 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 12:59:23,243 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 12:59:23,243 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 12:59:23,244 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing.i [2025-02-06 12:59:24,534 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/4c48eff2e/3fc92e57cff6498ca282410d3bed640d/FLAG0f7074f0d [2025-02-06 12:59:24,802 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 12:59:24,802 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing.i [2025-02-06 12:59:24,820 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/4c48eff2e/3fc92e57cff6498ca282410d3bed640d/FLAG0f7074f0d [2025-02-06 12:59:24,834 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/4c48eff2e/3fc92e57cff6498ca282410d3bed640d [2025-02-06 12:59:24,837 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 12:59:24,839 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 12:59:24,840 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 12:59:24,840 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 12:59:24,843 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 12:59:24,844 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 12:59:24" (1/1) ... [2025-02-06 12:59:24,845 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f2c4958 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:24, skipping insertion in model container [2025-02-06 12:59:24,845 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 12:59:24" (1/1) ... [2025-02-06 12:59:24,883 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 12:59:25,164 WARN L1731 CHandler]: Possible shadowing of function new [2025-02-06 12:59:25,164 WARN L1731 CHandler]: Possible shadowing of function new [2025-02-06 12:59:25,164 WARN L1731 CHandler]: Possible shadowing of function new [2025-02-06 12:59:25,165 WARN L1731 CHandler]: Possible shadowing of function new [2025-02-06 12:59:25,194 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 12:59:25,234 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2025-02-06 12:59:25,264 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 12:59:25,320 WARN L1731 CHandler]: Possible shadowing of function new [2025-02-06 12:59:25,320 WARN L1731 CHandler]: Possible shadowing of function new [2025-02-06 12:59:25,320 WARN L1731 CHandler]: Possible shadowing of function new [2025-02-06 12:59:25,320 WARN L1731 CHandler]: Possible shadowing of function new [2025-02-06 12:59:25,328 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 12:59:25,341 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 12:59:25,374 WARN L1731 CHandler]: Possible shadowing of function new [2025-02-06 12:59:25,374 WARN L1731 CHandler]: Possible shadowing of function new [2025-02-06 12:59:25,374 WARN L1731 CHandler]: Possible shadowing of function new [2025-02-06 12:59:25,375 WARN L1731 CHandler]: Possible shadowing of function new [2025-02-06 12:59:25,411 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 12:59:25,505 INFO L204 MainTranslator]: Completed translation [2025-02-06 12:59:25,506 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:25 WrapperNode [2025-02-06 12:59:25,506 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 12:59:25,507 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 12:59:25,507 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 12:59:25,507 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 12:59:25,517 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:25" (1/1) ... [2025-02-06 12:59:25,560 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:25" (1/1) ... [2025-02-06 12:59:25,639 INFO L138 Inliner]: procedures = 284, calls = 136, calls flagged for inlining = 12, calls inlined = 13, statements flattened = 290 [2025-02-06 12:59:25,640 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 12:59:25,640 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 12:59:25,640 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 12:59:25,640 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 12:59:25,647 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:25" (1/1) ... [2025-02-06 12:59:25,648 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:25" (1/1) ... [2025-02-06 12:59:25,651 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:25" (1/1) ... [2025-02-06 12:59:25,685 INFO L175 MemorySlicer]: Split 110 memory accesses to 4 slices as follows [2, 5, 101, 2]. 92 percent of accesses are in the largest equivalence class. The 87 initializations are split as follows [2, 5, 80, 0]. The 13 writes are split as follows [0, 0, 12, 1]. [2025-02-06 12:59:25,685 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:25" (1/1) ... [2025-02-06 12:59:25,686 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:25" (1/1) ... [2025-02-06 12:59:25,710 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:25" (1/1) ... [2025-02-06 12:59:25,712 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:25" (1/1) ... [2025-02-06 12:59:25,716 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:25" (1/1) ... [2025-02-06 12:59:25,721 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:25" (1/1) ... [2025-02-06 12:59:25,726 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 12:59:25,750 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 12:59:25,766 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 12:59:25,770 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 12:59:25,779 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:25" (1/1) ... [2025-02-06 12:59:25,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 12:59:25,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:25,830 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-06 12:59:25,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-06 12:59:25,867 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2025-02-06 12:59:25,867 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2025-02-06 12:59:25,868 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2025-02-06 12:59:25,868 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2025-02-06 12:59:25,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-02-06 12:59:25,868 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-02-06 12:59:25,868 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2025-02-06 12:59:25,868 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2025-02-06 12:59:25,868 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2025-02-06 12:59:25,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-02-06 12:59:25,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2025-02-06 12:59:25,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2025-02-06 12:59:25,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2025-02-06 12:59:25,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2025-02-06 12:59:25,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2025-02-06 12:59:25,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2025-02-06 12:59:25,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2025-02-06 12:59:25,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2025-02-06 12:59:25,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2025-02-06 12:59:25,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2025-02-06 12:59:25,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2025-02-06 12:59:25,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2025-02-06 12:59:25,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#0 [2025-02-06 12:59:25,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#1 [2025-02-06 12:59:25,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#2 [2025-02-06 12:59:25,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#3 [2025-02-06 12:59:25,871 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-02-06 12:59:25,871 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-02-06 12:59:25,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-06 12:59:25,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 12:59:25,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-02-06 12:59:25,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2025-02-06 12:59:25,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2025-02-06 12:59:25,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2025-02-06 12:59:25,872 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2025-02-06 12:59:25,873 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2025-02-06 12:59:25,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 12:59:25,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 12:59:25,874 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-06 12:59:26,001 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 12:59:26,002 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 12:59:26,634 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L1072: havoc main_~#t_ids~0#1.base, main_~#t_ids~0#1.offset; [2025-02-06 12:59:26,635 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L1072-1: SUMMARY for call ULTIMATE.dealloc(main_~#t_ids~0#1.base, main_~#t_ids~0#1.offset); srcloc: null [2025-02-06 12:59:26,857 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 12:59:26,857 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 12:59:28,551 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 12:59:28,554 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 12:59:28,555 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 12:59:28 BoogieIcfgContainer [2025-02-06 12:59:28,555 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 12:59:28,557 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 12:59:28,557 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 12:59:28,562 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 12:59:28,562 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 12:59:24" (1/3) ... [2025-02-06 12:59:28,562 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47cfb3fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 12:59:28, skipping insertion in model container [2025-02-06 12:59:28,562 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:25" (2/3) ... [2025-02-06 12:59:28,567 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47cfb3fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 12:59:28, skipping insertion in model container [2025-02-06 12:59:28,567 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 12:59:28" (3/3) ... [2025-02-06 12:59:28,568 INFO L128 eAbstractionObserver]: Analyzing ICFG 28-race_reach_92-evilcollapse_racing.i [2025-02-06 12:59:28,578 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 12:59:28,579 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 28-race_reach_92-evilcollapse_racing.i that has 2 procedures, 118 locations, 1 initial locations, 11 loop locations, and 48 error locations. [2025-02-06 12:59:28,580 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 12:59:28,630 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2025-02-06 12:59:28,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 136 transitions, 279 flow [2025-02-06 12:59:28,686 INFO L124 PetriNetUnfolderBase]: 18/148 cut-off events. [2025-02-06 12:59:28,687 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-02-06 12:59:28,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153 conditions, 148 events. 18/148 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 519 event pairs, 0 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 85. Up to 4 conditions per place. [2025-02-06 12:59:28,690 INFO L82 GeneralOperation]: Start removeDead. Operand has 121 places, 136 transitions, 279 flow [2025-02-06 12:59:28,693 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 136 transitions, 279 flow [2025-02-06 12:59:28,698 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 12:59:28,705 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;@4891bf72, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 12:59:28,705 INFO L334 AbstractCegarLoop]: Starting to check reachability of 64 error locations. [2025-02-06 12:59:28,712 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 12:59:28,712 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2025-02-06 12:59:28,712 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 12:59:28,712 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:28,713 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 12:59:28,713 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-02-06 12:59:28,716 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:28,716 INFO L85 PathProgramCache]: Analyzing trace with hash 811403, now seen corresponding path program 1 times [2025-02-06 12:59:28,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:59:28,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [226654524] [2025-02-06 12:59:28,724 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:28,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:28,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:28,728 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:59:28,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-06 12:59:28,814 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 12:59:28,944 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 12:59:28,944 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:28,944 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:28,965 INFO L256 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-06 12:59:28,968 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:29,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:59:29,010 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 12:59:29,010 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:59:29,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226654524] [2025-02-06 12:59:29,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226654524] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:59:29,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:59:29,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 12:59:29,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713499839] [2025-02-06 12:59:29,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:59:29,024 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 12:59:29,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:59:29,048 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 12:59:29,049 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 12:59:29,228 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 136 [2025-02-06 12:59:29,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 136 transitions, 279 flow. Second operand has 4 states, 4 states have (on average 73.75) internal successors, (295), 4 states have internal predecessors, (295), 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) [2025-02-06 12:59:29,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:29,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 136 [2025-02-06 12:59:29,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:29,518 INFO L124 PetriNetUnfolderBase]: 120/505 cut-off events. [2025-02-06 12:59:29,519 INFO L125 PetriNetUnfolderBase]: For 5/6 co-relation queries the response was YES. [2025-02-06 12:59:29,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 773 conditions, 505 events. 120/505 cut-off events. For 5/6 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2873 event pairs, 61 based on Foata normal form. 68/443 useless extension candidates. Maximal degree in co-relation 675. Up to 170 conditions per place. [2025-02-06 12:59:29,523 INFO L140 encePairwiseOnDemand]: 115/136 looper letters, 64 selfloop transitions, 4 changer transitions 0/141 dead transitions. [2025-02-06 12:59:29,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 141 transitions, 425 flow [2025-02-06 12:59:29,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 12:59:29,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 12:59:29,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 389 transitions. [2025-02-06 12:59:29,532 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7150735294117647 [2025-02-06 12:59:29,533 INFO L175 Difference]: Start difference. First operand has 121 places, 136 transitions, 279 flow. Second operand 4 states and 389 transitions. [2025-02-06 12:59:29,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 141 transitions, 425 flow [2025-02-06 12:59:29,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 141 transitions, 425 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-02-06 12:59:29,540 INFO L231 Difference]: Finished difference. Result has 120 places, 119 transitions, 259 flow [2025-02-06 12:59:29,541 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=259, PETRI_PLACES=120, PETRI_TRANSITIONS=119} [2025-02-06 12:59:29,543 INFO L279 CegarLoopForPetriNet]: 121 programPoint places, -1 predicate places. [2025-02-06 12:59:29,543 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 119 transitions, 259 flow [2025-02-06 12:59:29,544 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.75) internal successors, (295), 4 states have internal predecessors, (295), 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) [2025-02-06 12:59:29,544 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:29,544 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 12:59:29,556 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-06 12:59:29,748 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:29,748 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-02-06 12:59:29,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:29,749 INFO L85 PathProgramCache]: Analyzing trace with hash 811404, now seen corresponding path program 1 times [2025-02-06 12:59:29,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:59:29,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2114172515] [2025-02-06 12:59:29,749 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:29,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:29,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:29,751 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:59:29,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-06 12:59:29,824 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 12:59:29,982 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 12:59:29,982 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:29,982 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:30,001 INFO L256 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-06 12:59:30,003 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:30,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:59:30,054 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 12:59:30,054 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:59:30,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114172515] [2025-02-06 12:59:30,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114172515] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:59:30,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:59:30,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 12:59:30,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237158544] [2025-02-06 12:59:30,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:59:30,056 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 12:59:30,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:59:30,056 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 12:59:30,056 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 12:59:30,250 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 136 [2025-02-06 12:59:30,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 119 transitions, 259 flow. Second operand has 4 states, 4 states have (on average 76.75) internal successors, (307), 4 states have internal predecessors, (307), 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) [2025-02-06 12:59:30,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:30,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 136 [2025-02-06 12:59:30,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:30,989 INFO L124 PetriNetUnfolderBase]: 122/535 cut-off events. [2025-02-06 12:59:30,989 INFO L125 PetriNetUnfolderBase]: For 20/21 co-relation queries the response was YES. [2025-02-06 12:59:30,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 860 conditions, 535 events. 122/535 cut-off events. For 20/21 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3014 event pairs, 100 based on Foata normal form. 3/407 useless extension candidates. Maximal degree in co-relation 740. Up to 263 conditions per place. [2025-02-06 12:59:30,994 INFO L140 encePairwiseOnDemand]: 128/136 looper letters, 46 selfloop transitions, 5 changer transitions 0/123 dead transitions. [2025-02-06 12:59:30,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 123 transitions, 375 flow [2025-02-06 12:59:30,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 12:59:30,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 12:59:30,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 358 transitions. [2025-02-06 12:59:30,999 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6580882352941176 [2025-02-06 12:59:30,999 INFO L175 Difference]: Start difference. First operand has 120 places, 119 transitions, 259 flow. Second operand 4 states and 358 transitions. [2025-02-06 12:59:30,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 123 transitions, 375 flow [2025-02-06 12:59:31,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 123 transitions, 363 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 12:59:31,003 INFO L231 Difference]: Finished difference. Result has 122 places, 123 transitions, 292 flow [2025-02-06 12:59:31,004 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=292, PETRI_PLACES=122, PETRI_TRANSITIONS=123} [2025-02-06 12:59:31,004 INFO L279 CegarLoopForPetriNet]: 121 programPoint places, 1 predicate places. [2025-02-06 12:59:31,004 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 123 transitions, 292 flow [2025-02-06 12:59:31,004 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 76.75) internal successors, (307), 4 states have internal predecessors, (307), 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) [2025-02-06 12:59:31,005 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:31,005 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-02-06 12:59:31,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-06 12:59:31,206 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:31,207 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-02-06 12:59:31,207 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:31,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1596531879, now seen corresponding path program 1 times [2025-02-06 12:59:31,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:59:31,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [61834181] [2025-02-06 12:59:31,208 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:31,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:31,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:31,211 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:59:31,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-06 12:59:31,284 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 12:59:31,426 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 12:59:31,426 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:31,426 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:31,448 INFO L256 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-06 12:59:31,450 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:31,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-02-06 12:59:31,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:59:31,476 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 12:59:31,476 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:59:31,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61834181] [2025-02-06 12:59:31,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61834181] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:59:31,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:59:31,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 12:59:31,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223831958] [2025-02-06 12:59:31,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:59:31,476 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 12:59:31,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:59:31,477 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 12:59:31,477 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 12:59:31,599 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 136 [2025-02-06 12:59:31,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 123 transitions, 292 flow. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 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) [2025-02-06 12:59:31,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:31,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 136 [2025-02-06 12:59:31,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:31,812 INFO L124 PetriNetUnfolderBase]: 122/534 cut-off events. [2025-02-06 12:59:31,812 INFO L125 PetriNetUnfolderBase]: For 14/15 co-relation queries the response was YES. [2025-02-06 12:59:31,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 846 conditions, 534 events. 122/534 cut-off events. For 14/15 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3009 event pairs, 100 based on Foata normal form. 0/402 useless extension candidates. Maximal degree in co-relation 813. Up to 259 conditions per place. [2025-02-06 12:59:31,816 INFO L140 encePairwiseOnDemand]: 133/136 looper letters, 44 selfloop transitions, 3 changer transitions 0/122 dead transitions. [2025-02-06 12:59:31,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 122 transitions, 384 flow [2025-02-06 12:59:31,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 12:59:31,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 12:59:31,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 281 transitions. [2025-02-06 12:59:31,817 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6887254901960784 [2025-02-06 12:59:31,818 INFO L175 Difference]: Start difference. First operand has 122 places, 123 transitions, 292 flow. Second operand 3 states and 281 transitions. [2025-02-06 12:59:31,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 122 transitions, 384 flow [2025-02-06 12:59:31,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 122 transitions, 381 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 12:59:31,820 INFO L231 Difference]: Finished difference. Result has 122 places, 122 transitions, 293 flow [2025-02-06 12:59:31,821 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=293, PETRI_PLACES=122, PETRI_TRANSITIONS=122} [2025-02-06 12:59:31,821 INFO L279 CegarLoopForPetriNet]: 121 programPoint places, 1 predicate places. [2025-02-06 12:59:31,821 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 122 transitions, 293 flow [2025-02-06 12:59:31,822 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 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) [2025-02-06 12:59:31,822 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:31,822 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-02-06 12:59:31,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-06 12:59:32,026 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:32,026 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-02-06 12:59:32,027 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:32,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1596531880, now seen corresponding path program 1 times [2025-02-06 12:59:32,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:59:32,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [335118266] [2025-02-06 12:59:32,027 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:32,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:32,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:32,037 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:59:32,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-06 12:59:32,130 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 12:59:32,264 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 12:59:32,265 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:32,265 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:32,286 INFO L256 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-02-06 12:59:32,287 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:32,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2025-02-06 12:59:32,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:59:32,302 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 12:59:32,302 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:59:32,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335118266] [2025-02-06 12:59:32,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335118266] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:59:32,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:59:32,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 12:59:32,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738949611] [2025-02-06 12:59:32,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:59:32,307 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 12:59:32,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:59:32,307 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 12:59:32,307 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 12:59:32,397 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 136 [2025-02-06 12:59:32,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 122 transitions, 293 flow. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 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) [2025-02-06 12:59:32,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:32,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 136 [2025-02-06 12:59:32,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:32,718 INFO L124 PetriNetUnfolderBase]: 122/533 cut-off events. [2025-02-06 12:59:32,718 INFO L125 PetriNetUnfolderBase]: For 16/17 co-relation queries the response was YES. [2025-02-06 12:59:32,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 846 conditions, 533 events. 122/533 cut-off events. For 16/17 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3001 event pairs, 100 based on Foata normal form. 0/403 useless extension candidates. Maximal degree in co-relation 812. Up to 259 conditions per place. [2025-02-06 12:59:32,723 INFO L140 encePairwiseOnDemand]: 133/136 looper letters, 44 selfloop transitions, 3 changer transitions 0/121 dead transitions. [2025-02-06 12:59:32,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 121 transitions, 385 flow [2025-02-06 12:59:32,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 12:59:32,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 12:59:32,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 281 transitions. [2025-02-06 12:59:32,726 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6887254901960784 [2025-02-06 12:59:32,726 INFO L175 Difference]: Start difference. First operand has 122 places, 122 transitions, 293 flow. Second operand 3 states and 281 transitions. [2025-02-06 12:59:32,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 121 transitions, 385 flow [2025-02-06 12:59:32,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 121 transitions, 379 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 12:59:32,734 INFO L231 Difference]: Finished difference. Result has 121 places, 121 transitions, 291 flow [2025-02-06 12:59:32,734 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=291, PETRI_PLACES=121, PETRI_TRANSITIONS=121} [2025-02-06 12:59:32,744 INFO L279 CegarLoopForPetriNet]: 121 programPoint places, 0 predicate places. [2025-02-06 12:59:32,744 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 121 transitions, 291 flow [2025-02-06 12:59:32,744 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 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) [2025-02-06 12:59:32,744 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:32,744 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2025-02-06 12:59:32,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-06 12:59:32,945 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:32,945 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-02-06 12:59:32,945 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:32,945 INFO L85 PathProgramCache]: Analyzing trace with hash 2047122103, now seen corresponding path program 1 times [2025-02-06 12:59:32,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:59:32,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2073809642] [2025-02-06 12:59:32,961 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:32,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:32,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:32,986 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:59:32,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-06 12:59:33,135 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-06 12:59:33,271 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-06 12:59:33,271 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:33,271 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:33,291 INFO L256 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-02-06 12:59:33,291 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:33,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:59:33,303 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 12:59:33,303 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:59:33,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073809642] [2025-02-06 12:59:33,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073809642] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:59:33,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:59:33,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 12:59:33,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551488371] [2025-02-06 12:59:33,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:59:33,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 12:59:33,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:59:33,305 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 12:59:33,305 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 12:59:33,305 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 136 [2025-02-06 12:59:33,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 121 transitions, 291 flow. Second operand has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 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) [2025-02-06 12:59:33,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:33,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 136 [2025-02-06 12:59:33,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:34,224 INFO L124 PetriNetUnfolderBase]: 121/555 cut-off events. [2025-02-06 12:59:34,236 INFO L125 PetriNetUnfolderBase]: For 18/19 co-relation queries the response was YES. [2025-02-06 12:59:34,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 874 conditions, 555 events. 121/555 cut-off events. For 18/19 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3045 event pairs, 100 based on Foata normal form. 2/416 useless extension candidates. Maximal degree in co-relation 843. Up to 259 conditions per place. [2025-02-06 12:59:34,239 INFO L140 encePairwiseOnDemand]: 133/136 looper letters, 48 selfloop transitions, 3 changer transitions 0/125 dead transitions. [2025-02-06 12:59:34,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 125 transitions, 405 flow [2025-02-06 12:59:34,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 12:59:34,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 12:59:34,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 289 transitions. [2025-02-06 12:59:34,240 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7083333333333334 [2025-02-06 12:59:34,240 INFO L175 Difference]: Start difference. First operand has 121 places, 121 transitions, 291 flow. Second operand 3 states and 289 transitions. [2025-02-06 12:59:34,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 125 transitions, 405 flow [2025-02-06 12:59:34,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 125 transitions, 395 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 12:59:34,243 INFO L231 Difference]: Finished difference. Result has 122 places, 121 transitions, 296 flow [2025-02-06 12:59:34,243 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=296, PETRI_PLACES=122, PETRI_TRANSITIONS=121} [2025-02-06 12:59:34,243 INFO L279 CegarLoopForPetriNet]: 121 programPoint places, 1 predicate places. [2025-02-06 12:59:34,243 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 121 transitions, 296 flow [2025-02-06 12:59:34,244 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 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) [2025-02-06 12:59:34,244 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:34,244 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:34,258 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-06 12:59:34,444 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:34,444 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-02-06 12:59:34,445 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:34,445 INFO L85 PathProgramCache]: Analyzing trace with hash 2047120082, now seen corresponding path program 1 times [2025-02-06 12:59:34,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:59:34,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [40531667] [2025-02-06 12:59:34,445 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:34,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:34,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:34,462 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:59:34,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-06 12:59:34,540 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-06 12:59:34,706 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-06 12:59:34,706 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:34,706 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:34,734 INFO L256 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-06 12:59:34,735 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:34,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2025-02-06 12:59:34,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:59:34,809 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 12:59:34,809 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:59:34,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40531667] [2025-02-06 12:59:34,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40531667] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:59:34,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:59:34,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 12:59:34,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161358943] [2025-02-06 12:59:34,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:59:34,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 12:59:34,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:59:34,810 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 12:59:34,810 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 12:59:34,951 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 136 [2025-02-06 12:59:34,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 121 transitions, 296 flow. Second operand has 4 states, 4 states have (on average 74.75) internal successors, (299), 4 states have internal predecessors, (299), 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) [2025-02-06 12:59:34,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:34,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 136 [2025-02-06 12:59:34,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:35,238 INFO L124 PetriNetUnfolderBase]: 121/551 cut-off events. [2025-02-06 12:59:35,238 INFO L125 PetriNetUnfolderBase]: For 23/24 co-relation queries the response was YES. [2025-02-06 12:59:35,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 876 conditions, 551 events. 121/551 cut-off events. For 23/24 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3025 event pairs, 100 based on Foata normal form. 0/416 useless extension candidates. Maximal degree in co-relation 842. Up to 261 conditions per place. [2025-02-06 12:59:35,242 INFO L140 encePairwiseOnDemand]: 129/136 looper letters, 42 selfloop transitions, 7 changer transitions 0/119 dead transitions. [2025-02-06 12:59:35,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 119 transitions, 390 flow [2025-02-06 12:59:35,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 12:59:35,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 12:59:35,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 412 transitions. [2025-02-06 12:59:35,244 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6058823529411764 [2025-02-06 12:59:35,244 INFO L175 Difference]: Start difference. First operand has 122 places, 121 transitions, 296 flow. Second operand 5 states and 412 transitions. [2025-02-06 12:59:35,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 119 transitions, 390 flow [2025-02-06 12:59:35,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 119 transitions, 387 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 12:59:35,246 INFO L231 Difference]: Finished difference. Result has 123 places, 119 transitions, 303 flow [2025-02-06 12:59:35,250 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=303, PETRI_PLACES=123, PETRI_TRANSITIONS=119} [2025-02-06 12:59:35,251 INFO L279 CegarLoopForPetriNet]: 121 programPoint places, 2 predicate places. [2025-02-06 12:59:35,251 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 119 transitions, 303 flow [2025-02-06 12:59:35,251 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.75) internal successors, (299), 4 states have internal predecessors, (299), 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) [2025-02-06 12:59:35,251 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:35,251 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:35,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-06 12:59:35,452 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:35,452 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-02-06 12:59:35,452 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:35,452 INFO L85 PathProgramCache]: Analyzing trace with hash 2047120083, now seen corresponding path program 1 times [2025-02-06 12:59:35,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:59:35,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1570252511] [2025-02-06 12:59:35,453 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:35,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:35,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:35,454 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:59:35,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-06 12:59:35,560 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-06 12:59:35,733 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-06 12:59:35,734 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:35,734 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:35,757 INFO L256 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 12:59:35,758 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:35,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-02-06 12:59:35,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:59:35,789 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 12:59:35,789 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:59:35,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570252511] [2025-02-06 12:59:35,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570252511] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:59:35,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:59:35,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 12:59:35,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698771516] [2025-02-06 12:59:35,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:59:35,789 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 12:59:35,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:59:35,789 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 12:59:35,789 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 12:59:35,991 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 136 [2025-02-06 12:59:35,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 119 transitions, 303 flow. Second operand has 4 states, 4 states have (on average 76.5) internal successors, (306), 4 states have internal predecessors, (306), 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) [2025-02-06 12:59:35,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:35,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 136 [2025-02-06 12:59:35,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:36,625 INFO L124 PetriNetUnfolderBase]: 121/547 cut-off events. [2025-02-06 12:59:36,625 INFO L125 PetriNetUnfolderBase]: For 27/28 co-relation queries the response was YES. [2025-02-06 12:59:36,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 880 conditions, 547 events. 121/547 cut-off events. For 27/28 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2997 event pairs, 100 based on Foata normal form. 4/416 useless extension candidates. Maximal degree in co-relation 841. Up to 263 conditions per place. [2025-02-06 12:59:36,627 INFO L140 encePairwiseOnDemand]: 131/136 looper letters, 45 selfloop transitions, 4 changer transitions 0/117 dead transitions. [2025-02-06 12:59:36,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 117 transitions, 397 flow [2025-02-06 12:59:36,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 12:59:36,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 12:59:36,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 347 transitions. [2025-02-06 12:59:36,636 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6378676470588235 [2025-02-06 12:59:36,636 INFO L175 Difference]: Start difference. First operand has 123 places, 119 transitions, 303 flow. Second operand 4 states and 347 transitions. [2025-02-06 12:59:36,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 117 transitions, 397 flow [2025-02-06 12:59:36,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 117 transitions, 383 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 12:59:36,643 INFO L231 Difference]: Finished difference. Result has 120 places, 117 transitions, 293 flow [2025-02-06 12:59:36,643 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=293, PETRI_PLACES=120, PETRI_TRANSITIONS=117} [2025-02-06 12:59:36,644 INFO L279 CegarLoopForPetriNet]: 121 programPoint places, -1 predicate places. [2025-02-06 12:59:36,646 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 117 transitions, 293 flow [2025-02-06 12:59:36,646 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 76.5) internal successors, (306), 4 states have internal predecessors, (306), 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) [2025-02-06 12:59:36,646 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:36,646 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:36,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-02-06 12:59:36,847 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:36,847 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-02-06 12:59:36,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:36,849 INFO L85 PathProgramCache]: Analyzing trace with hash 187400530, now seen corresponding path program 1 times [2025-02-06 12:59:36,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:59:36,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1728668381] [2025-02-06 12:59:36,849 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:36,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:36,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:36,864 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:59:36,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-06 12:59:36,976 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-06 12:59:37,192 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-06 12:59:37,192 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:37,192 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:37,216 INFO L256 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-06 12:59:37,217 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:37,365 INFO L349 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2025-02-06 12:59:37,365 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 16 treesize of output 17 [2025-02-06 12:59:37,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:59:37,576 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 12:59:37,576 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:59:37,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728668381] [2025-02-06 12:59:37,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728668381] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:59:37,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:59:37,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 12:59:37,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534678795] [2025-02-06 12:59:37,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:59:37,576 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 12:59:37,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:59:37,577 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 12:59:37,577 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-06 12:59:38,763 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 136 [2025-02-06 12:59:38,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 117 transitions, 293 flow. Second operand has 6 states, 6 states have (on average 74.5) internal successors, (447), 6 states have internal predecessors, (447), 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) [2025-02-06 12:59:38,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:38,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 136 [2025-02-06 12:59:38,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:39,124 INFO L124 PetriNetUnfolderBase]: 120/518 cut-off events. [2025-02-06 12:59:39,125 INFO L125 PetriNetUnfolderBase]: For 19/20 co-relation queries the response was YES. [2025-02-06 12:59:39,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 853 conditions, 518 events. 120/518 cut-off events. For 19/20 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2819 event pairs, 61 based on Foata normal form. 2/393 useless extension candidates. Maximal degree in co-relation 818. Up to 177 conditions per place. [2025-02-06 12:59:39,129 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 67 selfloop transitions, 5 changer transitions 0/137 dead transitions. [2025-02-06 12:59:39,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 137 transitions, 477 flow [2025-02-06 12:59:39,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 12:59:39,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 12:59:39,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 362 transitions. [2025-02-06 12:59:39,131 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6654411764705882 [2025-02-06 12:59:39,131 INFO L175 Difference]: Start difference. First operand has 120 places, 117 transitions, 293 flow. Second operand 4 states and 362 transitions. [2025-02-06 12:59:39,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 137 transitions, 477 flow [2025-02-06 12:59:39,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 137 transitions, 469 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 12:59:39,133 INFO L231 Difference]: Finished difference. Result has 118 places, 115 transitions, 291 flow [2025-02-06 12:59:39,136 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=291, PETRI_PLACES=118, PETRI_TRANSITIONS=115} [2025-02-06 12:59:39,138 INFO L279 CegarLoopForPetriNet]: 121 programPoint places, -3 predicate places. [2025-02-06 12:59:39,138 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 115 transitions, 291 flow [2025-02-06 12:59:39,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 74.5) internal successors, (447), 6 states have internal predecessors, (447), 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) [2025-02-06 12:59:39,139 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:39,139 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:39,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-02-06 12:59:39,340 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:39,340 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-02-06 12:59:39,340 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:39,340 INFO L85 PathProgramCache]: Analyzing trace with hash 187400531, now seen corresponding path program 1 times [2025-02-06 12:59:39,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:59:39,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [365032671] [2025-02-06 12:59:39,341 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:39,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:39,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:39,365 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:59:39,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-06 12:59:39,510 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-06 12:59:39,699 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-06 12:59:39,700 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:39,700 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:39,722 INFO L256 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-06 12:59:39,723 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:39,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 12:59:39,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-02-06 12:59:39,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:59:39,979 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 12:59:39,979 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:59:39,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365032671] [2025-02-06 12:59:39,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365032671] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:59:39,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:59:39,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 12:59:39,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693581213] [2025-02-06 12:59:39,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:59:39,981 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 12:59:39,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:59:39,981 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 12:59:39,981 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 12:59:40,661 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 136 [2025-02-06 12:59:40,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 115 transitions, 291 flow. Second operand has 5 states, 5 states have (on average 76.4) internal successors, (382), 5 states have internal predecessors, (382), 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) [2025-02-06 12:59:40,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:40,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 136 [2025-02-06 12:59:40,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:41,105 INFO L124 PetriNetUnfolderBase]: 123/575 cut-off events. [2025-02-06 12:59:41,105 INFO L125 PetriNetUnfolderBase]: For 47/48 co-relation queries the response was YES. [2025-02-06 12:59:41,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 949 conditions, 575 events. 123/575 cut-off events. For 47/48 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 3244 event pairs, 101 based on Foata normal form. 2/432 useless extension candidates. Maximal degree in co-relation 858. Up to 270 conditions per place. [2025-02-06 12:59:41,107 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 52 selfloop transitions, 5 changer transitions 0/122 dead transitions. [2025-02-06 12:59:41,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 122 transitions, 435 flow [2025-02-06 12:59:41,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 12:59:41,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 12:59:41,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 356 transitions. [2025-02-06 12:59:41,109 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6544117647058824 [2025-02-06 12:59:41,109 INFO L175 Difference]: Start difference. First operand has 118 places, 115 transitions, 291 flow. Second operand 4 states and 356 transitions. [2025-02-06 12:59:41,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 122 transitions, 435 flow [2025-02-06 12:59:41,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 122 transitions, 419 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 12:59:41,111 INFO L231 Difference]: Finished difference. Result has 120 places, 119 transitions, 327 flow [2025-02-06 12:59:41,112 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=327, PETRI_PLACES=120, PETRI_TRANSITIONS=119} [2025-02-06 12:59:41,112 INFO L279 CegarLoopForPetriNet]: 121 programPoint places, -1 predicate places. [2025-02-06 12:59:41,112 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 119 transitions, 327 flow [2025-02-06 12:59:41,113 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.4) internal successors, (382), 5 states have internal predecessors, (382), 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) [2025-02-06 12:59:41,113 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:41,113 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:41,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-02-06 12:59:41,313 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:41,313 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-02-06 12:59:41,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:41,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1514449948, now seen corresponding path program 1 times [2025-02-06 12:59:41,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:59:41,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1733165192] [2025-02-06 12:59:41,314 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:41,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:41,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:41,316 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:59:41,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-06 12:59:41,574 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-06 12:59:41,923 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-06 12:59:41,924 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:41,924 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:41,957 INFO L256 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-02-06 12:59:41,965 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:42,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-06 12:59:42,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2025-02-06 12:59:42,167 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-02-06 12:59:42,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2025-02-06 12:59:42,217 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 [2025-02-06 12:59:42,265 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 [2025-02-06 12:59:42,295 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 [2025-02-06 12:59:42,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:59:42,349 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 12:59:42,349 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:59:42,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733165192] [2025-02-06 12:59:42,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733165192] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:59:42,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:59:42,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-02-06 12:59:42,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620021376] [2025-02-06 12:59:42,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:59:42,350 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-06 12:59:42,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:59:42,351 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-06 12:59:42,351 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2025-02-06 12:59:44,364 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 136 [2025-02-06 12:59:44,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 119 transitions, 327 flow. Second operand has 10 states, 10 states have (on average 63.0) internal successors, (630), 10 states have internal predecessors, (630), 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) [2025-02-06 12:59:44,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:44,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 136 [2025-02-06 12:59:44,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:45,446 INFO L124 PetriNetUnfolderBase]: 123/574 cut-off events. [2025-02-06 12:59:45,447 INFO L125 PetriNetUnfolderBase]: For 26/27 co-relation queries the response was YES. [2025-02-06 12:59:45,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 958 conditions, 574 events. 123/574 cut-off events. For 26/27 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3222 event pairs, 101 based on Foata normal form. 0/444 useless extension candidates. Maximal degree in co-relation 866. Up to 279 conditions per place. [2025-02-06 12:59:45,449 INFO L140 encePairwiseOnDemand]: 124/136 looper letters, 65 selfloop transitions, 11 changer transitions 0/135 dead transitions. [2025-02-06 12:59:45,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 135 transitions, 517 flow [2025-02-06 12:59:45,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-06 12:59:45,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-02-06 12:59:45,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 758 transitions. [2025-02-06 12:59:45,451 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5066844919786097 [2025-02-06 12:59:45,451 INFO L175 Difference]: Start difference. First operand has 120 places, 119 transitions, 327 flow. Second operand 11 states and 758 transitions. [2025-02-06 12:59:45,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 135 transitions, 517 flow [2025-02-06 12:59:45,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 135 transitions, 515 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 12:59:45,454 INFO L231 Difference]: Finished difference. Result has 134 places, 124 transitions, 383 flow [2025-02-06 12:59:45,454 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=383, PETRI_PLACES=134, PETRI_TRANSITIONS=124} [2025-02-06 12:59:45,454 INFO L279 CegarLoopForPetriNet]: 121 programPoint places, 13 predicate places. [2025-02-06 12:59:45,454 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 124 transitions, 383 flow [2025-02-06 12:59:45,455 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 63.0) internal successors, (630), 10 states have internal predecessors, (630), 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) [2025-02-06 12:59:45,455 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:45,455 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:45,469 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-02-06 12:59:45,655 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:45,655 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-02-06 12:59:45,656 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:45,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1514449949, now seen corresponding path program 1 times [2025-02-06 12:59:45,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:59:45,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1330238971] [2025-02-06 12:59:45,656 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:45,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:45,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:45,662 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:59:45,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-06 12:59:45,769 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-06 12:59:45,962 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-06 12:59:45,962 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:45,963 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:45,989 INFO L256 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-02-06 12:59:46,004 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:46,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-06 12:59:46,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-06 12:59:46,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2025-02-06 12:59:46,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2025-02-06 12:59:46,450 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-02-06 12:59:46,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2025-02-06 12:59:46,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-02-06 12:59:46,504 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 [2025-02-06 12:59:46,513 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 [2025-02-06 12:59:46,562 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 [2025-02-06 12:59:46,581 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 [2025-02-06 12:59:46,600 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 [2025-02-06 12:59:46,605 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 [2025-02-06 12:59:46,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:59:46,642 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 12:59:46,642 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:59:46,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330238971] [2025-02-06 12:59:46,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330238971] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:59:46,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:59:46,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-02-06 12:59:46,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604219150] [2025-02-06 12:59:46,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:59:46,643 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-06 12:59:46,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:59:46,643 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-06 12:59:46,643 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-02-06 12:59:47,931 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 136 [2025-02-06 12:59:47,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 124 transitions, 383 flow. Second operand has 10 states, 10 states have (on average 61.0) internal successors, (610), 10 states have internal predecessors, (610), 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) [2025-02-06 12:59:47,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:47,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 136 [2025-02-06 12:59:47,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:48,664 INFO L124 PetriNetUnfolderBase]: 123/573 cut-off events. [2025-02-06 12:59:48,665 INFO L125 PetriNetUnfolderBase]: For 37/38 co-relation queries the response was YES. [2025-02-06 12:59:48,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 995 conditions, 573 events. 123/573 cut-off events. For 37/38 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3240 event pairs, 101 based on Foata normal form. 1/447 useless extension candidates. Maximal degree in co-relation 915. Up to 283 conditions per place. [2025-02-06 12:59:48,667 INFO L140 encePairwiseOnDemand]: 125/136 looper letters, 68 selfloop transitions, 10 changer transitions 0/135 dead transitions. [2025-02-06 12:59:48,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 135 transitions, 569 flow [2025-02-06 12:59:48,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 12:59:48,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 12:59:48,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 678 transitions. [2025-02-06 12:59:48,670 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4985294117647059 [2025-02-06 12:59:48,671 INFO L175 Difference]: Start difference. First operand has 134 places, 124 transitions, 383 flow. Second operand 10 states and 678 transitions. [2025-02-06 12:59:48,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 135 transitions, 569 flow [2025-02-06 12:59:48,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 135 transitions, 565 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 12:59:48,674 INFO L231 Difference]: Finished difference. Result has 142 places, 124 transitions, 403 flow [2025-02-06 12:59:48,674 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=403, PETRI_PLACES=142, PETRI_TRANSITIONS=124} [2025-02-06 12:59:48,675 INFO L279 CegarLoopForPetriNet]: 121 programPoint places, 21 predicate places. [2025-02-06 12:59:48,676 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 124 transitions, 403 flow [2025-02-06 12:59:48,676 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 61.0) internal successors, (610), 10 states have internal predecessors, (610), 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) [2025-02-06 12:59:48,676 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:48,676 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:48,689 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-02-06 12:59:48,876 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:48,877 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-02-06 12:59:48,877 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:48,878 INFO L85 PathProgramCache]: Analyzing trace with hash -296691134, now seen corresponding path program 1 times [2025-02-06 12:59:48,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:59:48,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [641840584] [2025-02-06 12:59:48,879 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:48,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:48,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:48,881 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:59:48,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-06 12:59:48,981 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 12:59:49,145 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 12:59:49,145 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:49,145 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:49,167 INFO L256 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-06 12:59:49,168 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:49,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-02-06 12:59:49,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:59:49,234 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 12:59:49,234 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:59:49,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641840584] [2025-02-06 12:59:49,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641840584] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:59:49,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:59:49,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 12:59:49,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371612547] [2025-02-06 12:59:49,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:59:49,235 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 12:59:49,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:59:49,235 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 12:59:49,235 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 12:59:49,412 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 136 [2025-02-06 12:59:49,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 124 transitions, 403 flow. Second operand has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 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) [2025-02-06 12:59:49,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:49,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 136 [2025-02-06 12:59:49,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:49,651 INFO L124 PetriNetUnfolderBase]: 122/563 cut-off events. [2025-02-06 12:59:49,651 INFO L125 PetriNetUnfolderBase]: For 70/71 co-relation queries the response was YES. [2025-02-06 12:59:49,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 967 conditions, 563 events. 122/563 cut-off events. For 70/71 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 3176 event pairs, 100 based on Foata normal form. 8/441 useless extension candidates. Maximal degree in co-relation 887. Up to 260 conditions per place. [2025-02-06 12:59:49,653 INFO L140 encePairwiseOnDemand]: 131/136 looper letters, 45 selfloop transitions, 9 changer transitions 0/122 dead transitions. [2025-02-06 12:59:49,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 122 transitions, 507 flow [2025-02-06 12:59:49,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 12:59:49,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 12:59:49,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 353 transitions. [2025-02-06 12:59:49,654 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6488970588235294 [2025-02-06 12:59:49,655 INFO L175 Difference]: Start difference. First operand has 142 places, 124 transitions, 403 flow. Second operand 4 states and 353 transitions. [2025-02-06 12:59:49,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 122 transitions, 507 flow [2025-02-06 12:59:49,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 122 transitions, 487 flow, removed 0 selfloop flow, removed 9 redundant places. [2025-02-06 12:59:49,657 INFO L231 Difference]: Finished difference. Result has 134 places, 122 transitions, 397 flow [2025-02-06 12:59:49,657 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=397, PETRI_PLACES=134, PETRI_TRANSITIONS=122} [2025-02-06 12:59:49,659 INFO L279 CegarLoopForPetriNet]: 121 programPoint places, 13 predicate places. [2025-02-06 12:59:49,659 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 122 transitions, 397 flow [2025-02-06 12:59:49,659 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 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) [2025-02-06 12:59:49,659 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:49,659 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:49,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-02-06 12:59:49,862 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:49,863 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-02-06 12:59:49,863 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:49,863 INFO L85 PathProgramCache]: Analyzing trace with hash -296691135, now seen corresponding path program 1 times [2025-02-06 12:59:49,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:59:49,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1749275490] [2025-02-06 12:59:49,863 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:49,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:49,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:49,865 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:59:49,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-02-06 12:59:49,960 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 12:59:50,112 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 12:59:50,112 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:50,112 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:50,133 INFO L256 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 12:59:50,135 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:50,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:59:50,153 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 12:59:50,153 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:59:50,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749275490] [2025-02-06 12:59:50,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749275490] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:59:50,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:59:50,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 12:59:50,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457739579] [2025-02-06 12:59:50,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:59:50,157 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 12:59:50,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:59:50,157 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 12:59:50,157 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-06 12:59:50,329 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 136 [2025-02-06 12:59:50,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 122 transitions, 397 flow. Second operand has 5 states, 5 states have (on average 75.0) internal successors, (375), 5 states have internal predecessors, (375), 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) [2025-02-06 12:59:50,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:50,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 136 [2025-02-06 12:59:50,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:50,815 INFO L124 PetriNetUnfolderBase]: 122/555 cut-off events. [2025-02-06 12:59:50,815 INFO L125 PetriNetUnfolderBase]: For 56/57 co-relation queries the response was YES. [2025-02-06 12:59:50,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 975 conditions, 555 events. 122/555 cut-off events. For 56/57 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3123 event pairs, 100 based on Foata normal form. 0/433 useless extension candidates. Maximal degree in co-relation 896. Up to 262 conditions per place. [2025-02-06 12:59:50,817 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 48 selfloop transitions, 11 changer transitions 0/120 dead transitions. [2025-02-06 12:59:50,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 120 transitions, 511 flow [2025-02-06 12:59:50,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 12:59:50,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 12:59:50,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 414 transitions. [2025-02-06 12:59:50,819 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6088235294117647 [2025-02-06 12:59:50,819 INFO L175 Difference]: Start difference. First operand has 134 places, 122 transitions, 397 flow. Second operand 5 states and 414 transitions. [2025-02-06 12:59:50,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 120 transitions, 511 flow [2025-02-06 12:59:50,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 120 transitions, 493 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 12:59:50,822 INFO L231 Difference]: Finished difference. Result has 133 places, 120 transitions, 397 flow [2025-02-06 12:59:50,823 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=397, PETRI_PLACES=133, PETRI_TRANSITIONS=120} [2025-02-06 12:59:50,823 INFO L279 CegarLoopForPetriNet]: 121 programPoint places, 12 predicate places. [2025-02-06 12:59:50,823 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 120 transitions, 397 flow [2025-02-06 12:59:50,824 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 75.0) internal successors, (375), 5 states have internal predecessors, (375), 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) [2025-02-06 12:59:50,824 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:50,824 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:50,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-02-06 12:59:51,024 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:51,025 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-02-06 12:59:51,025 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:51,025 INFO L85 PathProgramCache]: Analyzing trace with hash 471729020, now seen corresponding path program 1 times [2025-02-06 12:59:51,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:59:51,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [248941913] [2025-02-06 12:59:51,026 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:51,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:51,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:51,029 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:59:51,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-02-06 12:59:51,108 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-06 12:59:51,274 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 12:59:51,275 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:51,275 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:51,299 INFO L256 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-02-06 12:59:51,300 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:51,323 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:59:51,324 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:59:51,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:59:51,349 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:59:51,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248941913] [2025-02-06 12:59:51,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248941913] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:59:51,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-06 12:59:51,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2025-02-06 12:59:51,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153397250] [2025-02-06 12:59:51,350 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-06 12:59:51,350 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 12:59:51,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:59:51,350 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 12:59:51,350 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-02-06 12:59:51,351 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 136 [2025-02-06 12:59:51,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 120 transitions, 397 flow. Second operand has 6 states, 6 states have (on average 82.83333333333333) internal successors, (497), 6 states have internal predecessors, (497), 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) [2025-02-06 12:59:51,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:51,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 136 [2025-02-06 12:59:51,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:51,675 INFO L124 PetriNetUnfolderBase]: 122/605 cut-off events. [2025-02-06 12:59:51,675 INFO L125 PetriNetUnfolderBase]: For 154/155 co-relation queries the response was YES. [2025-02-06 12:59:51,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1103 conditions, 605 events. 122/605 cut-off events. For 154/155 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 3287 event pairs, 100 based on Foata normal form. 6/485 useless extension candidates. Maximal degree in co-relation 1019. Up to 256 conditions per place. [2025-02-06 12:59:51,677 INFO L140 encePairwiseOnDemand]: 132/136 looper letters, 62 selfloop transitions, 11 changer transitions 0/139 dead transitions. [2025-02-06 12:59:51,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 139 transitions, 671 flow [2025-02-06 12:59:51,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 12:59:51,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 12:59:51,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 542 transitions. [2025-02-06 12:59:51,684 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6642156862745098 [2025-02-06 12:59:51,686 INFO L175 Difference]: Start difference. First operand has 133 places, 120 transitions, 397 flow. Second operand 6 states and 542 transitions. [2025-02-06 12:59:51,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 139 transitions, 671 flow [2025-02-06 12:59:51,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 139 transitions, 617 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 12:59:51,693 INFO L231 Difference]: Finished difference. Result has 138 places, 125 transitions, 461 flow [2025-02-06 12:59:51,693 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=461, PETRI_PLACES=138, PETRI_TRANSITIONS=125} [2025-02-06 12:59:51,693 INFO L279 CegarLoopForPetriNet]: 121 programPoint places, 17 predicate places. [2025-02-06 12:59:51,694 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 125 transitions, 461 flow [2025-02-06 12:59:51,694 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 82.83333333333333) internal successors, (497), 6 states have internal predecessors, (497), 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) [2025-02-06 12:59:51,694 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:51,694 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:51,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-02-06 12:59:51,894 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:51,895 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-02-06 12:59:51,895 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:51,895 INFO L85 PathProgramCache]: Analyzing trace with hash 86757687, now seen corresponding path program 1 times [2025-02-06 12:59:51,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:59:51,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [573291111] [2025-02-06 12:59:51,896 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:51,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:51,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:51,898 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:59:51,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-02-06 12:59:51,997 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-06 12:59:52,366 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-06 12:59:52,367 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:52,367 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:52,394 INFO L256 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-02-06 12:59:52,399 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:52,514 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 25 treesize of output 1 [2025-02-06 12:59:52,597 INFO L349 Elim1Store]: treesize reduction 94, result has 30.4 percent of original size [2025-02-06 12:59:52,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 54 [2025-02-06 12:59:52,685 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 38 treesize of output 31 [2025-02-06 12:59:52,751 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 38 treesize of output 31 [2025-02-06 12:59:52,783 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 28 treesize of output 21 [2025-02-06 12:59:52,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-02-06 12:59:52,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:59:52,870 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:59:52,973 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_573 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_573) |c_~#c~0.base|) (bvadd |c_~#c~0.offset| (_ bv4 32) (bvmul (_ bv12 32) |c_ULTIMATE.start_main_~i~0#1|))))))) is different from false [2025-02-06 12:59:53,088 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 12:59:53,089 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 30 treesize of output 31 [2025-02-06 12:59:53,102 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 12:59:53,102 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 54 treesize of output 57 [2025-02-06 12:59:53,110 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 21 treesize of output 14 [2025-02-06 13:00:02,569 INFO L349 Elim1Store]: treesize reduction 7, result has 96.7 percent of original size [2025-02-06 13:00:02,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 103 treesize of output 290 [2025-02-06 13:00:03,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:00:03,071 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 13:00:03,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573291111] [2025-02-06 13:00:03,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573291111] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:00:03,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:00:03,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2025-02-06 13:00:03,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631390878] [2025-02-06 13:00:03,071 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-06 13:00:03,071 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-06 13:00:03,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 13:00:03,073 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-06 13:00:03,073 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=251, Unknown=9, NotChecked=32, Total=342 [2025-02-06 13:00:07,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-02-06 13:00:07,903 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 136 [2025-02-06 13:00:07,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 125 transitions, 461 flow. Second operand has 19 states, 19 states have (on average 34.68421052631579) internal successors, (659), 19 states have internal predecessors, (659), 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) [2025-02-06 13:00:07,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:00:07,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 136 [2025-02-06 13:00:07,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:00:10,819 INFO L124 PetriNetUnfolderBase]: 329/1070 cut-off events. [2025-02-06 13:00:10,819 INFO L125 PetriNetUnfolderBase]: For 119/119 co-relation queries the response was YES. [2025-02-06 13:00:10,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2048 conditions, 1070 events. 329/1070 cut-off events. For 119/119 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 6366 event pairs, 292 based on Foata normal form. 0/838 useless extension candidates. Maximal degree in co-relation 1950. Up to 679 conditions per place. [2025-02-06 13:00:10,825 INFO L140 encePairwiseOnDemand]: 128/136 looper letters, 77 selfloop transitions, 26 changer transitions 0/136 dead transitions. [2025-02-06 13:00:10,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 136 transitions, 707 flow [2025-02-06 13:00:10,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-06 13:00:10,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-02-06 13:00:10,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 483 transitions. [2025-02-06 13:00:10,830 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2959558823529412 [2025-02-06 13:00:10,831 INFO L175 Difference]: Start difference. First operand has 138 places, 125 transitions, 461 flow. Second operand 12 states and 483 transitions. [2025-02-06 13:00:10,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 136 transitions, 707 flow [2025-02-06 13:00:10,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 136 transitions, 691 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-02-06 13:00:10,838 INFO L231 Difference]: Finished difference. Result has 150 places, 130 transitions, 534 flow [2025-02-06 13:00:10,838 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=445, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=534, PETRI_PLACES=150, PETRI_TRANSITIONS=130} [2025-02-06 13:00:10,838 INFO L279 CegarLoopForPetriNet]: 121 programPoint places, 29 predicate places. [2025-02-06 13:00:10,838 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 130 transitions, 534 flow [2025-02-06 13:00:10,838 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 34.68421052631579) internal successors, (659), 19 states have internal predecessors, (659), 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) [2025-02-06 13:00:10,838 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:00:10,839 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:00:10,870 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-02-06 13:00:11,043 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:00:11,043 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-02-06 13:00:11,044 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:00:11,044 INFO L85 PathProgramCache]: Analyzing trace with hash 86757688, now seen corresponding path program 1 times [2025-02-06 13:00:11,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 13:00:11,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1402245703] [2025-02-06 13:00:11,044 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:00:11,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:00:11,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:00:11,046 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:00:11,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-02-06 13:00:11,143 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-06 13:00:11,337 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-06 13:00:11,337 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:00:11,337 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:00:11,364 INFO L256 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-02-06 13:00:11,366 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:00:11,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-02-06 13:00:11,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-02-06 13:00:11,748 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 25 treesize of output 1 [2025-02-06 13:00:11,812 INFO L349 Elim1Store]: treesize reduction 31, result has 46.6 percent of original size [2025-02-06 13:00:11,812 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 23 treesize of output 31 [2025-02-06 13:00:11,854 INFO L349 Elim1Store]: treesize reduction 31, result has 36.7 percent of original size [2025-02-06 13:00:11,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2025-02-06 13:00:11,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 29 [2025-02-06 13:00:11,922 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 21 treesize of output 16 [2025-02-06 13:00:11,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2025-02-06 13:00:11,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 29 [2025-02-06 13:00:12,006 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 26 treesize of output 19 [2025-02-06 13:00:12,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-02-06 13:00:12,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2025-02-06 13:00:12,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:00:12,074 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:00:12,215 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd |c_~#c~0.offset| (_ bv4 32) (bvmul (_ bv12 32) |c_ULTIMATE.start_main_~i~0#1|)))) (and (forall ((v_ArrVal_681 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_681) |c_~#c~0.base|) .cse1))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (forall ((v_ArrVal_680 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_681 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_681) |c_~#c~0.base|) .cse1)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_680) |c_~#c~0.base|) .cse1)))))) is different from false [2025-02-06 13:00:12,274 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd |c_~#c~0.offset| (_ bv4 32) (bvmul (_ bv12 32) |c_ULTIMATE.start_main_~i~0#1|)))) (and (forall ((v_ArrVal_680 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_681 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_681) |c_~#c~0.base|) .cse0) (_ bv8 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_680) |c_~#c~0.base|) .cse0)))) (forall ((v_ArrVal_681 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_681) |c_~#c~0.base|) .cse0))) (bvule (bvadd .cse1 (_ bv4 32)) (bvadd .cse1 (_ bv8 32))))))) is different from false [2025-02-06 13:00:12,520 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:00:12,521 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 50 treesize of output 51 [2025-02-06 13:00:12,529 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:00:12,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 43 [2025-02-06 13:00:12,557 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:00:12,557 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 78 treesize of output 81 [2025-02-06 13:00:12,588 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:00:12,589 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 124 treesize of output 118 [2025-02-06 13:00:12,600 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 28 treesize of output 21 [2025-02-06 13:00:12,608 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 21 treesize of output 14 [2025-02-06 13:00:13,215 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:00:13,215 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 47 treesize of output 40 [2025-02-06 13:00:13,232 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:00:13,232 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 64 treesize of output 58 [2025-02-06 13:00:13,240 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 25 treesize of output 11 [2025-02-06 13:00:20,834 INFO L349 Elim1Store]: treesize reduction 10, result has 90.1 percent of original size [2025-02-06 13:00:20,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 76 treesize of output 156 [2025-02-06 13:00:23,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2025-02-06 13:00:23,149 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 13:00:23,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402245703] [2025-02-06 13:00:23,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402245703] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:00:23,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:00:23,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2025-02-06 13:00:23,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122593601] [2025-02-06 13:00:23,149 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-06 13:00:23,150 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-06 13:00:23,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 13:00:23,150 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-06 13:00:23,150 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=328, Unknown=3, NotChecked=74, Total=462 [2025-02-06 13:00:25,155 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 136 [2025-02-06 13:00:25,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 130 transitions, 534 flow. Second operand has 22 states, 22 states have (on average 24.545454545454547) internal successors, (540), 22 states have internal predecessors, (540), 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) [2025-02-06 13:00:25,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:00:25,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 136 [2025-02-06 13:00:25,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:00:30,091 INFO L124 PetriNetUnfolderBase]: 465/1298 cut-off events. [2025-02-06 13:00:30,091 INFO L125 PetriNetUnfolderBase]: For 162/162 co-relation queries the response was YES. [2025-02-06 13:00:30,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2602 conditions, 1298 events. 465/1298 cut-off events. For 162/162 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 7795 event pairs, 422 based on Foata normal form. 6/877 useless extension candidates. Maximal degree in co-relation 2513. Up to 955 conditions per place. [2025-02-06 13:00:30,096 INFO L140 encePairwiseOnDemand]: 126/136 looper letters, 84 selfloop transitions, 28 changer transitions 0/135 dead transitions. [2025-02-06 13:00:30,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 135 transitions, 772 flow [2025-02-06 13:00:30,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-06 13:00:30,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-02-06 13:00:30,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 418 transitions. [2025-02-06 13:00:30,102 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.21953781512605042 [2025-02-06 13:00:30,102 INFO L175 Difference]: Start difference. First operand has 150 places, 130 transitions, 534 flow. Second operand 14 states and 418 transitions. [2025-02-06 13:00:30,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 135 transitions, 772 flow [2025-02-06 13:00:30,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 135 transitions, 735 flow, removed 10 selfloop flow, removed 4 redundant places. [2025-02-06 13:00:30,105 INFO L231 Difference]: Finished difference. Result has 161 places, 132 transitions, 567 flow [2025-02-06 13:00:30,105 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=497, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=567, PETRI_PLACES=161, PETRI_TRANSITIONS=132} [2025-02-06 13:00:30,106 INFO L279 CegarLoopForPetriNet]: 121 programPoint places, 40 predicate places. [2025-02-06 13:00:30,107 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 132 transitions, 567 flow [2025-02-06 13:00:30,107 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 24.545454545454547) internal successors, (540), 22 states have internal predecessors, (540), 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) [2025-02-06 13:00:30,107 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:00:30,107 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1] [2025-02-06 13:00:30,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-02-06 13:00:30,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:00:30,308 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-02-06 13:00:30,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:00:30,309 INFO L85 PathProgramCache]: Analyzing trace with hash -731214345, now seen corresponding path program 2 times [2025-02-06 13:00:30,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 13:00:30,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1978165040] [2025-02-06 13:00:30,309 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:00:30,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:00:30,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:00:30,311 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:00:30,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-02-06 13:00:30,471 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-02-06 13:00:30,773 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-02-06 13:00:30,773 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:00:30,773 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:00:30,805 INFO L256 TraceCheckSpWp]: Trace formula consists of 900 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-06 13:00:30,808 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:00:30,882 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:00:30,883 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:00:31,015 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:00:31,017 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 13:00:31,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978165040] [2025-02-06 13:00:31,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978165040] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:00:31,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:00:31,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2025-02-06 13:00:31,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977102961] [2025-02-06 13:00:31,017 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-06 13:00:31,019 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-06 13:00:31,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 13:00:31,020 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-06 13:00:31,020 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2025-02-06 13:00:31,020 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 136 [2025-02-06 13:00:31,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 132 transitions, 567 flow. Second operand has 12 states, 12 states have (on average 83.91666666666667) internal successors, (1007), 12 states have internal predecessors, (1007), 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) [2025-02-06 13:00:31,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:00:31,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 136 [2025-02-06 13:00:31,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:00:32,220 INFO L124 PetriNetUnfolderBase]: 122/713 cut-off events. [2025-02-06 13:00:32,220 INFO L125 PetriNetUnfolderBase]: For 535/536 co-relation queries the response was YES. [2025-02-06 13:00:32,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1623 conditions, 713 events. 122/713 cut-off events. For 535/536 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 3229 event pairs, 100 based on Foata normal form. 12/606 useless extension candidates. Maximal degree in co-relation 1534. Up to 256 conditions per place. [2025-02-06 13:00:32,224 INFO L140 encePairwiseOnDemand]: 132/136 looper letters, 92 selfloop transitions, 23 changer transitions 0/184 dead transitions. [2025-02-06 13:00:32,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 184 transitions, 1281 flow [2025-02-06 13:00:32,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-06 13:00:32,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-02-06 13:00:32,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1055 transitions. [2025-02-06 13:00:32,235 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6464460784313726 [2025-02-06 13:00:32,235 INFO L175 Difference]: Start difference. First operand has 161 places, 132 transitions, 567 flow. Second operand 12 states and 1055 transitions. [2025-02-06 13:00:32,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 184 transitions, 1281 flow [2025-02-06 13:00:32,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 184 transitions, 1125 flow, removed 0 selfloop flow, removed 11 redundant places. [2025-02-06 13:00:32,241 INFO L231 Difference]: Finished difference. Result has 168 places, 145 transitions, 768 flow [2025-02-06 13:00:32,241 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=515, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=768, PETRI_PLACES=168, PETRI_TRANSITIONS=145} [2025-02-06 13:00:32,241 INFO L279 CegarLoopForPetriNet]: 121 programPoint places, 47 predicate places. [2025-02-06 13:00:32,241 INFO L471 AbstractCegarLoop]: Abstraction has has 168 places, 145 transitions, 768 flow [2025-02-06 13:00:32,242 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 83.91666666666667) internal successors, (1007), 12 states have internal predecessors, (1007), 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) [2025-02-06 13:00:32,242 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:00:32,243 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1] [2025-02-06 13:00:32,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-02-06 13:00:32,443 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:00:32,443 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-02-06 13:00:32,446 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:00:32,446 INFO L85 PathProgramCache]: Analyzing trace with hash 130830039, now seen corresponding path program 3 times [2025-02-06 13:00:32,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 13:00:32,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1918315214] [2025-02-06 13:00:32,447 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:00:32,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:00:32,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:00:32,449 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:00:32,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-02-06 13:00:32,713 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 97 statements into 12 equivalence classes.