./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/09-regions_22-nocollapse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 551b0097 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/goblint-regression/09-regions_22-nocollapse.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 a0270befea30c9963adb19613f3074c8c29d9100e1f0592dc0c89cf3d3dda0df --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-10 00:55:58,386 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-10 00:55:58,457 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-01-10 00:55:58,465 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-10 00:55:58,466 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-10 00:55:58,493 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-10 00:55:58,494 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-10 00:55:58,495 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-10 00:55:58,495 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-10 00:55:58,495 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-10 00:55:58,496 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-10 00:55:58,496 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-10 00:55:58,497 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-10 00:55:58,497 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-10 00:55:58,497 INFO L153 SettingsManager]: * Use SBE=true [2025-01-10 00:55:58,497 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-10 00:55:58,497 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-10 00:55:58,498 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-10 00:55:58,498 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-10 00:55:58,498 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-10 00:55:58,498 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-01-10 00:55:58,498 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-01-10 00:55:58,498 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-01-10 00:55:58,498 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-10 00:55:58,498 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-01-10 00:55:58,498 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-01-10 00:55:58,498 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-10 00:55:58,498 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-10 00:55:58,498 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-10 00:55:58,499 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-10 00:55:58,499 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-10 00:55:58,499 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-10 00:55:58,499 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-10 00:55:58,499 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-10 00:55:58,499 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-10 00:55:58,499 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-10 00:55:58,499 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-10 00:55:58,499 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-10 00:55:58,499 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-10 00:55:58,499 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-10 00:55:58,499 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-10 00:55:58,499 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-10 00:55:58,499 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-10 00:55:58,499 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-10 00:55:58,500 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-10 00:55:58,500 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-10 00:55:58,500 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-10 00:55:58,500 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 -> a0270befea30c9963adb19613f3074c8c29d9100e1f0592dc0c89cf3d3dda0df [2025-01-10 00:55:58,788 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-10 00:55:58,797 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-10 00:55:58,799 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-10 00:55:58,800 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-10 00:55:58,800 INFO L274 PluginConnector]: CDTParser initialized [2025-01-10 00:55:58,801 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/09-regions_22-nocollapse.i [2025-01-10 00:56:00,128 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/46e66ed06/76d775546b944a4d829c048c37925688/FLAG2657b25a6 [2025-01-10 00:56:00,474 INFO L384 CDTParser]: Found 1 translation units. [2025-01-10 00:56:00,475 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_22-nocollapse.i [2025-01-10 00:56:00,499 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/46e66ed06/76d775546b944a4d829c048c37925688/FLAG2657b25a6 [2025-01-10 00:56:00,516 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/46e66ed06/76d775546b944a4d829c048c37925688 [2025-01-10 00:56:00,518 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-10 00:56:00,521 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-10 00:56:00,522 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-10 00:56:00,522 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-10 00:56:00,526 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-10 00:56:00,527 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:56:00" (1/1) ... [2025-01-10 00:56:00,528 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d6a1323 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:56:00, skipping insertion in model container [2025-01-10 00:56:00,528 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:56:00" (1/1) ... [2025-01-10 00:56:00,570 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-10 00:56:00,923 WARN L1731 CHandler]: Possible shadowing of function new [2025-01-10 00:56:00,923 WARN L1731 CHandler]: Possible shadowing of function new [2025-01-10 00:56:00,923 WARN L1731 CHandler]: Possible shadowing of function new [2025-01-10 00:56:00,923 WARN L1731 CHandler]: Possible shadowing of function new [2025-01-10 00:56:00,947 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-10 00:56:00,992 ERROR L321 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2025-01-10 00:56:00,994 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3af08363 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:56:00, skipping insertion in model container [2025-01-10 00:56:00,994 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-10 00:56:00,995 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2025-01-10 00:56:00,998 INFO L158 Benchmark]: Toolchain (without parser) took 475.78ms. Allocated memory is still 142.6MB. Free memory was 109.0MB in the beginning and 92.3MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-01-10 00:56:00,999 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 201.3MB. Free memory is still 126.6MB. There was no memory consumed. Max. memory is 16.1GB. [2025-01-10 00:56:00,999 INFO L158 Benchmark]: CACSL2BoogieTranslator took 472.97ms. Allocated memory is still 142.6MB. Free memory was 108.3MB in the beginning and 92.3MB in the end (delta: 16.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-01-10 00:56:01,001 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 201.3MB. Free memory is still 126.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 472.97ms. Allocated memory is still 142.6MB. Free memory was 108.3MB in the beginning and 92.3MB in the end (delta: 16.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1038]: 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/09-regions_22-nocollapse.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 a0270befea30c9963adb19613f3074c8c29d9100e1f0592dc0c89cf3d3dda0df --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-10 00:56:03,047 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-10 00:56:03,147 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2025-01-10 00:56:03,153 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-10 00:56:03,153 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-10 00:56:03,180 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-10 00:56:03,180 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-10 00:56:03,181 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-10 00:56:03,181 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-10 00:56:03,181 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-10 00:56:03,181 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-10 00:56:03,181 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-10 00:56:03,181 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-10 00:56:03,183 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-10 00:56:03,184 INFO L153 SettingsManager]: * Use SBE=true [2025-01-10 00:56:03,184 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-10 00:56:03,185 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-10 00:56:03,185 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-10 00:56:03,185 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-10 00:56:03,185 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-10 00:56:03,186 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-01-10 00:56:03,186 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-01-10 00:56:03,186 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-01-10 00:56:03,186 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-10 00:56:03,186 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-01-10 00:56:03,186 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2025-01-10 00:56:03,186 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2025-01-10 00:56:03,186 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-01-10 00:56:03,186 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-10 00:56:03,186 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-10 00:56:03,187 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-10 00:56:03,187 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-10 00:56:03,187 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-10 00:56:03,187 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-10 00:56:03,188 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-10 00:56:03,188 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-10 00:56:03,188 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-10 00:56:03,188 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-10 00:56:03,188 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-10 00:56:03,188 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-10 00:56:03,188 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-10 00:56:03,188 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-10 00:56:03,189 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-10 00:56:03,189 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2025-01-10 00:56:03,189 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2025-01-10 00:56:03,189 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-10 00:56:03,189 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-10 00:56:03,189 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-10 00:56:03,189 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-10 00:56:03,189 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 -> a0270befea30c9963adb19613f3074c8c29d9100e1f0592dc0c89cf3d3dda0df [2025-01-10 00:56:03,501 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-10 00:56:03,511 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-10 00:56:03,513 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-10 00:56:03,516 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-10 00:56:03,519 INFO L274 PluginConnector]: CDTParser initialized [2025-01-10 00:56:03,520 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/09-regions_22-nocollapse.i [2025-01-10 00:56:04,779 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/0f7af7b27/c1d21408bd414abcab1e3f4ad00bc61c/FLAG2f945a75b [2025-01-10 00:56:05,109 INFO L384 CDTParser]: Found 1 translation units. [2025-01-10 00:56:05,112 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_22-nocollapse.i [2025-01-10 00:56:05,132 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/0f7af7b27/c1d21408bd414abcab1e3f4ad00bc61c/FLAG2f945a75b [2025-01-10 00:56:05,352 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/0f7af7b27/c1d21408bd414abcab1e3f4ad00bc61c [2025-01-10 00:56:05,355 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-10 00:56:05,356 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-10 00:56:05,359 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-10 00:56:05,359 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-10 00:56:05,363 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-10 00:56:05,364 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:56:05" (1/1) ... [2025-01-10 00:56:05,365 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15fd80bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:56:05, skipping insertion in model container [2025-01-10 00:56:05,365 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:56:05" (1/1) ... [2025-01-10 00:56:05,406 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-10 00:56:05,718 WARN L1731 CHandler]: Possible shadowing of function new [2025-01-10 00:56:05,719 WARN L1731 CHandler]: Possible shadowing of function new [2025-01-10 00:56:05,719 WARN L1731 CHandler]: Possible shadowing of function new [2025-01-10 00:56:05,719 WARN L1731 CHandler]: Possible shadowing of function new [2025-01-10 00:56:05,753 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-10 00:56:05,795 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2025-01-10 00:56:05,810 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-10 00:56:05,858 WARN L1731 CHandler]: Possible shadowing of function new [2025-01-10 00:56:05,858 WARN L1731 CHandler]: Possible shadowing of function new [2025-01-10 00:56:05,859 WARN L1731 CHandler]: Possible shadowing of function new [2025-01-10 00:56:05,859 WARN L1731 CHandler]: Possible shadowing of function new [2025-01-10 00:56:05,873 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-10 00:56:05,900 INFO L200 MainTranslator]: Completed pre-run [2025-01-10 00:56:05,933 WARN L1731 CHandler]: Possible shadowing of function new [2025-01-10 00:56:05,933 WARN L1731 CHandler]: Possible shadowing of function new [2025-01-10 00:56:05,933 WARN L1731 CHandler]: Possible shadowing of function new [2025-01-10 00:56:05,934 WARN L1731 CHandler]: Possible shadowing of function new [2025-01-10 00:56:05,941 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-10 00:56:06,040 INFO L204 MainTranslator]: Completed translation [2025-01-10 00:56:06,041 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:56:06 WrapperNode [2025-01-10 00:56:06,042 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-10 00:56:06,043 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-10 00:56:06,043 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-10 00:56:06,043 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-10 00:56:06,049 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:56:06" (1/1) ... [2025-01-10 00:56:06,074 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:56:06" (1/1) ... [2025-01-10 00:56:06,108 INFO L138 Inliner]: procedures = 275, calls = 98, calls flagged for inlining = 9, calls inlined = 8, statements flattened = 179 [2025-01-10 00:56:06,112 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-10 00:56:06,112 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-10 00:56:06,113 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-10 00:56:06,113 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-10 00:56:06,121 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:56:06" (1/1) ... [2025-01-10 00:56:06,121 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:56:06" (1/1) ... [2025-01-10 00:56:06,127 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:56:06" (1/1) ... [2025-01-10 00:56:06,157 INFO L175 MemorySlicer]: Split 84 memory accesses to 1 slices as follows [84]. 100 percent of accesses are in the largest equivalence class. The 70 initializations are split as follows [70]. The 10 writes are split as follows [10]. [2025-01-10 00:56:06,160 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:56:06" (1/1) ... [2025-01-10 00:56:06,161 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:56:06" (1/1) ... [2025-01-10 00:56:06,181 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:56:06" (1/1) ... [2025-01-10 00:56:06,184 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:56:06" (1/1) ... [2025-01-10 00:56:06,186 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:56:06" (1/1) ... [2025-01-10 00:56:06,188 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:56:06" (1/1) ... [2025-01-10 00:56:06,190 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:56:06" (1/1) ... [2025-01-10 00:56:06,193 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-10 00:56:06,194 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-10 00:56:06,194 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-10 00:56:06,194 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-10 00:56:06,195 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:56:06" (1/1) ... [2025-01-10 00:56:06,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-10 00:56:06,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:56:06,231 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-01-10 00:56:06,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-01-10 00:56:06,260 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2025-01-10 00:56:06,260 INFO L130 BoogieDeclarations]: Found specification of procedure f [2025-01-10 00:56:06,260 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2025-01-10 00:56:06,260 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-01-10 00:56:06,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2025-01-10 00:56:06,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2025-01-10 00:56:06,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#0 [2025-01-10 00:56:06,261 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-01-10 00:56:06,261 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-01-10 00:56:06,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-01-10 00:56:06,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-10 00:56:06,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-01-10 00:56:06,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-10 00:56:06,261 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-10 00:56:06,262 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-01-10 00:56:06,427 INFO L234 CfgBuilder]: Building ICFG [2025-01-10 00:56:06,429 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-10 00:56:07,035 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-01-10 00:56:07,035 INFO L283 CfgBuilder]: Performing block encoding [2025-01-10 00:56:08,400 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-10 00:56:08,401 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-01-10 00:56:08,402 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:56:08 BoogieIcfgContainer [2025-01-10 00:56:08,402 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-10 00:56:08,404 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-10 00:56:08,404 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-10 00:56:08,408 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-10 00:56:08,408 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 12:56:05" (1/3) ... [2025-01-10 00:56:08,409 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36e12e73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 12:56:08, skipping insertion in model container [2025-01-10 00:56:08,410 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:56:06" (2/3) ... [2025-01-10 00:56:08,411 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36e12e73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 12:56:08, skipping insertion in model container [2025-01-10 00:56:08,411 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:56:08" (3/3) ... [2025-01-10 00:56:08,412 INFO L128 eAbstractionObserver]: Analyzing ICFG 09-regions_22-nocollapse.i [2025-01-10 00:56:08,429 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-10 00:56:08,431 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 09-regions_22-nocollapse.i that has 2 procedures, 60 locations, 1 initial locations, 4 loop locations, and 29 error locations. [2025-01-10 00:56:08,431 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-01-10 00:56:08,516 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-01-10 00:56:08,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 85 transitions, 178 flow [2025-01-10 00:56:08,599 INFO L124 PetriNetUnfolderBase]: 6/83 cut-off events. [2025-01-10 00:56:08,601 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-01-10 00:56:08,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 83 events. 6/83 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 337 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2025-01-10 00:56:08,606 INFO L82 GeneralOperation]: Start removeDead. Operand has 86 places, 85 transitions, 178 flow [2025-01-10 00:56:08,610 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 83 transitions, 172 flow [2025-01-10 00:56:08,619 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-10 00:56:08,630 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;@44299299, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-10 00:56:08,630 INFO L334 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2025-01-10 00:56:08,644 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-01-10 00:56:08,644 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2025-01-10 00:56:08,644 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-01-10 00:56:08,645 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:56:08,645 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-01-10 00:56:08,646 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2025-01-10 00:56:08,650 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:56:08,650 INFO L85 PathProgramCache]: Analyzing trace with hash 507510, now seen corresponding path program 1 times [2025-01-10 00:56:08,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 00:56:08,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [288421886] [2025-01-10 00:56:08,660 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 00:56:08,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:08,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:56:08,664 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:56:08,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-01-10 00:56:08,771 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-01-10 00:56:08,953 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-01-10 00:56:08,953 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:56:08,953 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:56:08,979 INFO L256 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-01-10 00:56:08,984 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:56:09,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:56:09,045 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 00:56:09,045 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 00:56:09,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288421886] [2025-01-10 00:56:09,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288421886] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 00:56:09,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 00:56:09,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-10 00:56:09,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111754215] [2025-01-10 00:56:09,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 00:56:09,052 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-10 00:56:09,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 00:56:09,074 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-10 00:56:09,074 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-10 00:56:09,288 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 85 [2025-01-10 00:56:09,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 83 transitions, 172 flow. Second operand has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 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) [2025-01-10 00:56:09,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:56:09,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 85 [2025-01-10 00:56:09,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:56:09,733 INFO L124 PetriNetUnfolderBase]: 389/864 cut-off events. [2025-01-10 00:56:09,733 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-01-10 00:56:09,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1493 conditions, 864 events. 389/864 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5032 event pairs, 287 based on Foata normal form. 1/723 useless extension candidates. Maximal degree in co-relation 1440. Up to 606 conditions per place. [2025-01-10 00:56:09,744 INFO L140 encePairwiseOnDemand]: 78/85 looper letters, 32 selfloop transitions, 3 changer transitions 0/79 dead transitions. [2025-01-10 00:56:09,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 79 transitions, 234 flow [2025-01-10 00:56:09,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-10 00:56:09,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-10 00:56:09,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 223 transitions. [2025-01-10 00:56:09,759 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6558823529411765 [2025-01-10 00:56:09,760 INFO L175 Difference]: Start difference. First operand has 84 places, 83 transitions, 172 flow. Second operand 4 states and 223 transitions. [2025-01-10 00:56:09,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 79 transitions, 234 flow [2025-01-10 00:56:09,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 79 transitions, 232 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-10 00:56:09,771 INFO L231 Difference]: Finished difference. Result has 81 places, 79 transitions, 168 flow [2025-01-10 00:56:09,773 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=81, PETRI_TRANSITIONS=79} [2025-01-10 00:56:09,777 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -3 predicate places. [2025-01-10 00:56:09,778 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 79 transitions, 168 flow [2025-01-10 00:56:09,778 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 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) [2025-01-10 00:56:09,778 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:56:09,778 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-01-10 00:56:09,792 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-01-10 00:56:09,983 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:09,983 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2025-01-10 00:56:09,984 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:56:09,984 INFO L85 PathProgramCache]: Analyzing trace with hash 507511, now seen corresponding path program 1 times [2025-01-10 00:56:09,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 00:56:09,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [918923652] [2025-01-10 00:56:09,986 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 00:56:09,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:09,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:56:09,989 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:56:09,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-01-10 00:56:10,071 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-01-10 00:56:10,274 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-01-10 00:56:10,275 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:56:10,275 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:56:10,297 INFO L256 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-01-10 00:56:10,299 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:56:10,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:56:10,372 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 00:56:10,372 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 00:56:10,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918923652] [2025-01-10 00:56:10,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918923652] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 00:56:10,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 00:56:10,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-10 00:56:10,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919938639] [2025-01-10 00:56:10,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 00:56:10,374 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-10 00:56:10,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 00:56:10,374 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-10 00:56:10,374 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-10 00:56:10,580 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 85 [2025-01-10 00:56:10,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 79 transitions, 168 flow. Second operand has 4 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 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) [2025-01-10 00:56:10,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:56:10,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 85 [2025-01-10 00:56:10,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:56:10,964 INFO L124 PetriNetUnfolderBase]: 390/869 cut-off events. [2025-01-10 00:56:10,964 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-01-10 00:56:10,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1508 conditions, 869 events. 390/869 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4982 event pairs, 287 based on Foata normal form. 3/731 useless extension candidates. Maximal degree in co-relation 1480. Up to 611 conditions per place. [2025-01-10 00:56:10,976 INFO L140 encePairwiseOnDemand]: 77/85 looper letters, 36 selfloop transitions, 5 changer transitions 0/83 dead transitions. [2025-01-10 00:56:10,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 83 transitions, 262 flow [2025-01-10 00:56:10,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-10 00:56:10,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-10 00:56:10,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 236 transitions. [2025-01-10 00:56:10,982 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6941176470588235 [2025-01-10 00:56:10,983 INFO L175 Difference]: Start difference. First operand has 81 places, 79 transitions, 168 flow. Second operand 4 states and 236 transitions. [2025-01-10 00:56:10,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 83 transitions, 262 flow [2025-01-10 00:56:10,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 83 transitions, 252 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-01-10 00:56:10,987 INFO L231 Difference]: Finished difference. Result has 83 places, 83 transitions, 201 flow [2025-01-10 00:56:10,988 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=201, PETRI_PLACES=83, PETRI_TRANSITIONS=83} [2025-01-10 00:56:10,989 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -1 predicate places. [2025-01-10 00:56:10,989 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 83 transitions, 201 flow [2025-01-10 00:56:10,989 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 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) [2025-01-10 00:56:10,989 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:56:10,989 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-01-10 00:56:11,003 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 [2025-01-10 00:56:11,190 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:11,191 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2025-01-10 00:56:11,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:56:11,191 INFO L85 PathProgramCache]: Analyzing trace with hash -2060185368, now seen corresponding path program 1 times [2025-01-10 00:56:11,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 00:56:11,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [769601735] [2025-01-10 00:56:11,192 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 00:56:11,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:11,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:56:11,194 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:56:11,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-01-10 00:56:11,273 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-01-10 00:56:11,437 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-01-10 00:56:11,437 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:56:11,437 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:56:11,459 INFO L256 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-01-10 00:56:11,461 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:56:11,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-01-10 00:56:11,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:56:11,501 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 00:56:11,501 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 00:56:11,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769601735] [2025-01-10 00:56:11,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769601735] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 00:56:11,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 00:56:11,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-10 00:56:11,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725912246] [2025-01-10 00:56:11,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 00:56:11,502 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-10 00:56:11,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 00:56:11,503 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-10 00:56:11,503 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-10 00:56:11,624 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 85 [2025-01-10 00:56:11,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 83 transitions, 201 flow. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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) [2025-01-10 00:56:11,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:56:11,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 85 [2025-01-10 00:56:11,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:56:11,960 INFO L124 PetriNetUnfolderBase]: 390/868 cut-off events. [2025-01-10 00:56:11,961 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-01-10 00:56:11,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1516 conditions, 868 events. 390/868 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4954 event pairs, 287 based on Foata normal form. 0/726 useless extension candidates. Maximal degree in co-relation 1486. Up to 607 conditions per place. [2025-01-10 00:56:11,967 INFO L140 encePairwiseOnDemand]: 82/85 looper letters, 34 selfloop transitions, 3 changer transitions 0/82 dead transitions. [2025-01-10 00:56:11,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 82 transitions, 273 flow [2025-01-10 00:56:11,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-10 00:56:11,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-01-10 00:56:11,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 187 transitions. [2025-01-10 00:56:11,972 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7333333333333333 [2025-01-10 00:56:11,973 INFO L175 Difference]: Start difference. First operand has 83 places, 83 transitions, 201 flow. Second operand 3 states and 187 transitions. [2025-01-10 00:56:11,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 82 transitions, 273 flow [2025-01-10 00:56:11,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 82 transitions, 270 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-01-10 00:56:11,975 INFO L231 Difference]: Finished difference. Result has 83 places, 82 transitions, 202 flow [2025-01-10 00:56:11,976 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=83, PETRI_TRANSITIONS=82} [2025-01-10 00:56:11,976 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -1 predicate places. [2025-01-10 00:56:11,976 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 82 transitions, 202 flow [2025-01-10 00:56:11,977 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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) [2025-01-10 00:56:11,977 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:56:11,977 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-01-10 00:56:11,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-01-10 00:56:12,182 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:12,182 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2025-01-10 00:56:12,183 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:56:12,183 INFO L85 PathProgramCache]: Analyzing trace with hash -2060185369, now seen corresponding path program 1 times [2025-01-10 00:56:12,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 00:56:12,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1024027237] [2025-01-10 00:56:12,183 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 00:56:12,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:12,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:56:12,186 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:56:12,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-01-10 00:56:12,259 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-01-10 00:56:12,416 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-01-10 00:56:12,416 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:56:12,416 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:56:12,436 INFO L256 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-01-10 00:56:12,439 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:56:12,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2025-01-10 00:56:12,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:56:12,452 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 00:56:12,452 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 00:56:12,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024027237] [2025-01-10 00:56:12,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024027237] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 00:56:12,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 00:56:12,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-10 00:56:12,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826780968] [2025-01-10 00:56:12,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 00:56:12,452 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-10 00:56:12,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 00:56:12,453 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-10 00:56:12,453 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-10 00:56:12,524 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 85 [2025-01-10 00:56:12,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 82 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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) [2025-01-10 00:56:12,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:56:12,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 85 [2025-01-10 00:56:12,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:56:12,800 INFO L124 PetriNetUnfolderBase]: 390/867 cut-off events. [2025-01-10 00:56:12,801 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-01-10 00:56:12,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1516 conditions, 867 events. 390/867 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4973 event pairs, 287 based on Foata normal form. 0/727 useless extension candidates. Maximal degree in co-relation 1485. Up to 607 conditions per place. [2025-01-10 00:56:12,808 INFO L140 encePairwiseOnDemand]: 82/85 looper letters, 34 selfloop transitions, 3 changer transitions 0/81 dead transitions. [2025-01-10 00:56:12,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 81 transitions, 274 flow [2025-01-10 00:56:12,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-10 00:56:12,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-01-10 00:56:12,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 187 transitions. [2025-01-10 00:56:12,813 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7333333333333333 [2025-01-10 00:56:12,813 INFO L175 Difference]: Start difference. First operand has 83 places, 82 transitions, 202 flow. Second operand 3 states and 187 transitions. [2025-01-10 00:56:12,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 81 transitions, 274 flow [2025-01-10 00:56:12,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 81 transitions, 268 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-10 00:56:12,815 INFO L231 Difference]: Finished difference. Result has 82 places, 81 transitions, 200 flow [2025-01-10 00:56:12,815 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=82, PETRI_TRANSITIONS=81} [2025-01-10 00:56:12,815 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -2 predicate places. [2025-01-10 00:56:12,815 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 81 transitions, 200 flow [2025-01-10 00:56:12,818 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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) [2025-01-10 00:56:12,818 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:56:12,818 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2025-01-10 00:56:12,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-01-10 00:56:13,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:13,019 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2025-01-10 00:56:13,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:56:13,020 INFO L85 PathProgramCache]: Analyzing trace with hash 558763135, now seen corresponding path program 1 times [2025-01-10 00:56:13,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 00:56:13,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1647829376] [2025-01-10 00:56:13,021 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 00:56:13,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:13,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:56:13,023 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:56:13,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-01-10 00:56:13,093 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-01-10 00:56:13,228 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-01-10 00:56:13,229 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:56:13,229 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:56:13,242 INFO L256 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-01-10 00:56:13,243 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:56:13,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:56:13,249 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 00:56:13,249 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 00:56:13,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647829376] [2025-01-10 00:56:13,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647829376] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 00:56:13,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 00:56:13,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-10 00:56:13,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430043434] [2025-01-10 00:56:13,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 00:56:13,250 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-10 00:56:13,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 00:56:13,250 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-10 00:56:13,250 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-10 00:56:13,251 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 85 [2025-01-10 00:56:13,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 81 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 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) [2025-01-10 00:56:13,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:56:13,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 85 [2025-01-10 00:56:13,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:56:13,519 INFO L124 PetriNetUnfolderBase]: 389/889 cut-off events. [2025-01-10 00:56:13,520 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-01-10 00:56:13,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1544 conditions, 889 events. 389/889 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5004 event pairs, 287 based on Foata normal form. 2/740 useless extension candidates. Maximal degree in co-relation 1516. Up to 607 conditions per place. [2025-01-10 00:56:13,526 INFO L140 encePairwiseOnDemand]: 82/85 looper letters, 38 selfloop transitions, 3 changer transitions 0/85 dead transitions. [2025-01-10 00:56:13,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 85 transitions, 294 flow [2025-01-10 00:56:13,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-10 00:56:13,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-01-10 00:56:13,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 195 transitions. [2025-01-10 00:56:13,528 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7647058823529411 [2025-01-10 00:56:13,528 INFO L175 Difference]: Start difference. First operand has 82 places, 81 transitions, 200 flow. Second operand 3 states and 195 transitions. [2025-01-10 00:56:13,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 85 transitions, 294 flow [2025-01-10 00:56:13,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 85 transitions, 284 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-10 00:56:13,532 INFO L231 Difference]: Finished difference. Result has 83 places, 81 transitions, 205 flow [2025-01-10 00:56:13,533 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=205, PETRI_PLACES=83, PETRI_TRANSITIONS=81} [2025-01-10 00:56:13,533 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -1 predicate places. [2025-01-10 00:56:13,534 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 81 transitions, 205 flow [2025-01-10 00:56:13,534 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 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) [2025-01-10 00:56:13,534 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:56:13,534 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-01-10 00:56:13,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-01-10 00:56:13,734 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:13,734 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2025-01-10 00:56:13,735 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:56:13,735 INFO L85 PathProgramCache]: Analyzing trace with hash 558763513, now seen corresponding path program 1 times [2025-01-10 00:56:13,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 00:56:13,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [47028083] [2025-01-10 00:56:13,736 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 00:56:13,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:13,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:56:13,740 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:56:13,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-01-10 00:56:13,809 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-01-10 00:56:13,934 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-01-10 00:56:13,934 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:56:13,934 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:56:13,950 INFO L256 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-01-10 00:56:13,951 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:56:13,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2025-01-10 00:56:13,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:56:13,972 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 00:56:13,972 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 00:56:13,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47028083] [2025-01-10 00:56:13,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47028083] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 00:56:13,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 00:56:13,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-10 00:56:13,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776082697] [2025-01-10 00:56:13,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 00:56:13,973 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-10 00:56:13,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 00:56:13,973 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-10 00:56:13,973 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-10 00:56:14,068 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 85 [2025-01-10 00:56:14,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 81 transitions, 205 flow. Second operand has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 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) [2025-01-10 00:56:14,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:56:14,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 85 [2025-01-10 00:56:14,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:56:14,326 INFO L124 PetriNetUnfolderBase]: 389/885 cut-off events. [2025-01-10 00:56:14,327 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2025-01-10 00:56:14,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1546 conditions, 885 events. 389/885 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4964 event pairs, 287 based on Foata normal form. 0/740 useless extension candidates. Maximal degree in co-relation 1515. Up to 609 conditions per place. [2025-01-10 00:56:14,332 INFO L140 encePairwiseOnDemand]: 78/85 looper letters, 32 selfloop transitions, 7 changer transitions 0/79 dead transitions. [2025-01-10 00:56:14,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 79 transitions, 279 flow [2025-01-10 00:56:14,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-10 00:56:14,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-01-10 00:56:14,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 262 transitions. [2025-01-10 00:56:14,334 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6164705882352941 [2025-01-10 00:56:14,334 INFO L175 Difference]: Start difference. First operand has 83 places, 81 transitions, 205 flow. Second operand 5 states and 262 transitions. [2025-01-10 00:56:14,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 79 transitions, 279 flow [2025-01-10 00:56:14,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 79 transitions, 276 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-01-10 00:56:14,336 INFO L231 Difference]: Finished difference. Result has 84 places, 79 transitions, 212 flow [2025-01-10 00:56:14,337 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=212, PETRI_PLACES=84, PETRI_TRANSITIONS=79} [2025-01-10 00:56:14,337 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 0 predicate places. [2025-01-10 00:56:14,337 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 79 transitions, 212 flow [2025-01-10 00:56:14,337 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 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) [2025-01-10 00:56:14,338 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:56:14,338 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-01-10 00:56:14,352 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-01-10 00:56:14,538 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:14,539 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2025-01-10 00:56:14,539 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:56:14,539 INFO L85 PathProgramCache]: Analyzing trace with hash 558763514, now seen corresponding path program 1 times [2025-01-10 00:56:14,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 00:56:14,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1502207219] [2025-01-10 00:56:14,540 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 00:56:14,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:14,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:56:14,543 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:56:14,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-01-10 00:56:14,621 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-01-10 00:56:14,780 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-01-10 00:56:14,781 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:56:14,781 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:56:14,796 INFO L256 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-10 00:56:14,797 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:56:14,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-01-10 00:56:14,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:56:14,830 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 00:56:14,830 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 00:56:14,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502207219] [2025-01-10 00:56:14,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502207219] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 00:56:14,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 00:56:14,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-10 00:56:14,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327584525] [2025-01-10 00:56:14,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 00:56:14,830 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-10 00:56:14,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 00:56:14,830 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-10 00:56:14,831 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-10 00:56:14,951 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 85 [2025-01-10 00:56:14,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 79 transitions, 212 flow. Second operand has 4 states, 4 states have (on average 48.5) internal successors, (194), 4 states have internal predecessors, (194), 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) [2025-01-10 00:56:14,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:56:14,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 85 [2025-01-10 00:56:14,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:56:15,222 INFO L124 PetriNetUnfolderBase]: 389/881 cut-off events. [2025-01-10 00:56:15,222 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2025-01-10 00:56:15,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1550 conditions, 881 events. 389/881 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4958 event pairs, 287 based on Foata normal form. 4/740 useless extension candidates. Maximal degree in co-relation 1514. Up to 611 conditions per place. [2025-01-10 00:56:15,228 INFO L140 encePairwiseOnDemand]: 80/85 looper letters, 35 selfloop transitions, 4 changer transitions 0/77 dead transitions. [2025-01-10 00:56:15,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 77 transitions, 286 flow [2025-01-10 00:56:15,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-10 00:56:15,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-10 00:56:15,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 225 transitions. [2025-01-10 00:56:15,230 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6617647058823529 [2025-01-10 00:56:15,230 INFO L175 Difference]: Start difference. First operand has 84 places, 79 transitions, 212 flow. Second operand 4 states and 225 transitions. [2025-01-10 00:56:15,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 77 transitions, 286 flow [2025-01-10 00:56:15,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 77 transitions, 272 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-01-10 00:56:15,232 INFO L231 Difference]: Finished difference. Result has 81 places, 77 transitions, 202 flow [2025-01-10 00:56:15,232 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=202, PETRI_PLACES=81, PETRI_TRANSITIONS=77} [2025-01-10 00:56:15,233 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -3 predicate places. [2025-01-10 00:56:15,233 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 77 transitions, 202 flow [2025-01-10 00:56:15,233 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.5) internal successors, (194), 4 states have internal predecessors, (194), 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) [2025-01-10 00:56:15,233 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:56:15,233 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 00:56:15,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-01-10 00:56:15,434 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:15,434 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2025-01-10 00:56:15,435 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:56:15,435 INFO L85 PathProgramCache]: Analyzing trace with hash 100837660, now seen corresponding path program 1 times [2025-01-10 00:56:15,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 00:56:15,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [472726243] [2025-01-10 00:56:15,435 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 00:56:15,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:15,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:56:15,437 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:56:15,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-01-10 00:56:15,502 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-01-10 00:56:15,635 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-01-10 00:56:15,635 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:56:15,635 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:56:15,651 INFO L256 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-01-10 00:56:15,652 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:56:15,700 INFO L349 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2025-01-10 00:56:15,701 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 [2025-01-10 00:56:15,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:56:15,788 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 00:56:15,788 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 00:56:15,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472726243] [2025-01-10 00:56:15,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472726243] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 00:56:15,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 00:56:15,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-10 00:56:15,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997007443] [2025-01-10 00:56:15,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 00:56:15,789 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-10 00:56:15,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 00:56:15,789 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-10 00:56:15,789 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-01-10 00:56:16,089 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 85 [2025-01-10 00:56:16,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 77 transitions, 202 flow. Second operand has 6 states, 6 states have (on average 47.5) internal successors, (285), 6 states have internal predecessors, (285), 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) [2025-01-10 00:56:16,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:56:16,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 85 [2025-01-10 00:56:16,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:56:16,310 INFO L124 PetriNetUnfolderBase]: 389/877 cut-off events. [2025-01-10 00:56:16,310 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-01-10 00:56:16,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1544 conditions, 877 events. 389/877 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4915 event pairs, 287 based on Foata normal form. 2/738 useless extension candidates. Maximal degree in co-relation 1512. Up to 613 conditions per place. [2025-01-10 00:56:16,316 INFO L140 encePairwiseOnDemand]: 80/85 looper letters, 35 selfloop transitions, 4 changer transitions 0/75 dead transitions. [2025-01-10 00:56:16,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 75 transitions, 276 flow [2025-01-10 00:56:16,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-10 00:56:16,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-10 00:56:16,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 221 transitions. [2025-01-10 00:56:16,318 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.65 [2025-01-10 00:56:16,318 INFO L175 Difference]: Start difference. First operand has 81 places, 77 transitions, 202 flow. Second operand 4 states and 221 transitions. [2025-01-10 00:56:16,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 75 transitions, 276 flow [2025-01-10 00:56:16,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 75 transitions, 268 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-01-10 00:56:16,320 INFO L231 Difference]: Finished difference. Result has 79 places, 75 transitions, 198 flow [2025-01-10 00:56:16,320 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=198, PETRI_PLACES=79, PETRI_TRANSITIONS=75} [2025-01-10 00:56:16,321 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -5 predicate places. [2025-01-10 00:56:16,321 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 75 transitions, 198 flow [2025-01-10 00:56:16,321 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 47.5) internal successors, (285), 6 states have internal predecessors, (285), 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) [2025-01-10 00:56:16,321 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:56:16,322 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 00:56:16,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-01-10 00:56:16,522 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:16,522 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2025-01-10 00:56:16,523 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:56:16,523 INFO L85 PathProgramCache]: Analyzing trace with hash 100837661, now seen corresponding path program 1 times [2025-01-10 00:56:16,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 00:56:16,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1625483928] [2025-01-10 00:56:16,523 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 00:56:16,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:16,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:56:16,525 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:56:16,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-01-10 00:56:16,592 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-01-10 00:56:16,725 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-01-10 00:56:16,725 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:56:16,725 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:56:16,742 INFO L256 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-01-10 00:56:16,743 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:56:16,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-10 00:56:16,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-01-10 00:56:16,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:56:16,908 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 00:56:16,908 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 00:56:16,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625483928] [2025-01-10 00:56:16,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625483928] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 00:56:16,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 00:56:16,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-10 00:56:16,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353136850] [2025-01-10 00:56:16,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 00:56:16,908 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-10 00:56:16,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 00:56:16,908 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-10 00:56:16,909 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-01-10 00:56:17,121 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 85 [2025-01-10 00:56:17,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 75 transitions, 198 flow. Second operand has 5 states, 5 states have (on average 49.4) internal successors, (247), 5 states have internal predecessors, (247), 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) [2025-01-10 00:56:17,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:56:17,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 85 [2025-01-10 00:56:17,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:56:17,436 INFO L124 PetriNetUnfolderBase]: 390/907 cut-off events. [2025-01-10 00:56:17,436 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2025-01-10 00:56:17,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1591 conditions, 907 events. 390/907 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5274 event pairs, 287 based on Foata normal form. 2/754 useless extension candidates. Maximal degree in co-relation 1503. Up to 615 conditions per place. [2025-01-10 00:56:17,442 INFO L140 encePairwiseOnDemand]: 79/85 looper letters, 41 selfloop transitions, 5 changer transitions 0/82 dead transitions. [2025-01-10 00:56:17,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 82 transitions, 320 flow [2025-01-10 00:56:17,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-10 00:56:17,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-10 00:56:17,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 237 transitions. [2025-01-10 00:56:17,445 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6970588235294117 [2025-01-10 00:56:17,445 INFO L175 Difference]: Start difference. First operand has 79 places, 75 transitions, 198 flow. Second operand 4 states and 237 transitions. [2025-01-10 00:56:17,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 82 transitions, 320 flow [2025-01-10 00:56:17,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 82 transitions, 306 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-01-10 00:56:17,448 INFO L231 Difference]: Finished difference. Result has 81 places, 79 transitions, 236 flow [2025-01-10 00:56:17,448 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=236, PETRI_PLACES=81, PETRI_TRANSITIONS=79} [2025-01-10 00:56:17,449 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -3 predicate places. [2025-01-10 00:56:17,449 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 79 transitions, 236 flow [2025-01-10 00:56:17,450 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 49.4) internal successors, (247), 5 states have internal predecessors, (247), 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) [2025-01-10 00:56:17,450 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:56:17,450 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 00:56:17,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-01-10 00:56:17,651 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:17,651 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2025-01-10 00:56:17,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:56:17,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1168999266, now seen corresponding path program 1 times [2025-01-10 00:56:17,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 00:56:17,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [589038525] [2025-01-10 00:56:17,652 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 00:56:17,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:17,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:56:17,654 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:56:17,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-01-10 00:56:17,719 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-01-10 00:56:17,887 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-01-10 00:56:17,887 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:56:17,887 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:56:17,905 INFO L256 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-01-10 00:56:17,907 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:56:17,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-01-10 00:56:18,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-01-10 00:56:18,069 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-01-10 00:56:18,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2025-01-10 00:56:18,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2025-01-10 00:56:18,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2025-01-10 00:56:18,186 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2025-01-10 00:56:18,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:56:18,253 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 00:56:18,253 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 00:56:18,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589038525] [2025-01-10 00:56:18,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589038525] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 00:56:18,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 00:56:18,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-01-10 00:56:18,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365775130] [2025-01-10 00:56:18,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 00:56:18,254 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-01-10 00:56:18,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 00:56:18,254 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-01-10 00:56:18,254 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2025-01-10 00:56:19,357 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 85 [2025-01-10 00:56:19,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 79 transitions, 236 flow. Second operand has 10 states, 10 states have (on average 36.0) internal successors, (360), 10 states have internal predecessors, (360), 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) [2025-01-10 00:56:19,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:56:19,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 85 [2025-01-10 00:56:19,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:56:20,064 INFO L124 PetriNetUnfolderBase]: 390/906 cut-off events. [2025-01-10 00:56:20,064 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2025-01-10 00:56:20,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1622 conditions, 906 events. 390/906 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5268 event pairs, 287 based on Foata normal form. 0/766 useless extension candidates. Maximal degree in co-relation 1533. Up to 624 conditions per place. [2025-01-10 00:56:20,070 INFO L140 encePairwiseOnDemand]: 73/85 looper letters, 54 selfloop transitions, 11 changer transitions 0/95 dead transitions. [2025-01-10 00:56:20,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 95 transitions, 404 flow [2025-01-10 00:56:20,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-01-10 00:56:20,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-01-10 00:56:20,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 450 transitions. [2025-01-10 00:56:20,073 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48128342245989303 [2025-01-10 00:56:20,073 INFO L175 Difference]: Start difference. First operand has 81 places, 79 transitions, 236 flow. Second operand 11 states and 450 transitions. [2025-01-10 00:56:20,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 95 transitions, 404 flow [2025-01-10 00:56:20,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 95 transitions, 402 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-01-10 00:56:20,076 INFO L231 Difference]: Finished difference. Result has 95 places, 84 transitions, 292 flow [2025-01-10 00:56:20,076 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=292, PETRI_PLACES=95, PETRI_TRANSITIONS=84} [2025-01-10 00:56:20,077 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 11 predicate places. [2025-01-10 00:56:20,077 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 84 transitions, 292 flow [2025-01-10 00:56:20,077 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 36.0) internal successors, (360), 10 states have internal predecessors, (360), 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) [2025-01-10 00:56:20,077 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:56:20,077 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 00:56:20,093 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-01-10 00:56:20,277 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:20,278 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2025-01-10 00:56:20,278 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:56:20,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1168999265, now seen corresponding path program 1 times [2025-01-10 00:56:20,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 00:56:20,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1732890820] [2025-01-10 00:56:20,279 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 00:56:20,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:20,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:56:20,280 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:56:20,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-01-10 00:56:20,357 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-01-10 00:56:20,502 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-01-10 00:56:20,502 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:56:20,502 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:56:20,519 INFO L256 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 35 conjuncts are in the unsatisfiable core [2025-01-10 00:56:20,522 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:56:20,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-01-10 00:56:20,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-01-10 00:56:20,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-01-10 00:56:20,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2025-01-10 00:56:20,715 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-01-10 00:56:20,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2025-01-10 00:56:20,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-01-10 00:56:20,769 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 [2025-01-10 00:56:20,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2025-01-10 00:56:20,817 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 [2025-01-10 00:56:20,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2025-01-10 00:56:20,868 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 [2025-01-10 00:56:20,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2025-01-10 00:56:20,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:56:20,940 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 00:56:20,940 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 00:56:20,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732890820] [2025-01-10 00:56:20,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732890820] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 00:56:20,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 00:56:20,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-01-10 00:56:20,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624346745] [2025-01-10 00:56:20,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 00:56:20,940 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-01-10 00:56:20,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 00:56:20,941 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-01-10 00:56:20,941 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-01-10 00:56:21,974 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 85 [2025-01-10 00:56:21,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 84 transitions, 292 flow. Second operand has 10 states, 10 states have (on average 34.0) internal successors, (340), 10 states have internal predecessors, (340), 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) [2025-01-10 00:56:21,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:56:21,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 85 [2025-01-10 00:56:21,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:56:22,585 INFO L124 PetriNetUnfolderBase]: 390/905 cut-off events. [2025-01-10 00:56:22,585 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2025-01-10 00:56:22,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1659 conditions, 905 events. 390/905 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5271 event pairs, 287 based on Foata normal form. 1/769 useless extension candidates. Maximal degree in co-relation 1582. Up to 628 conditions per place. [2025-01-10 00:56:22,592 INFO L140 encePairwiseOnDemand]: 73/85 looper letters, 56 selfloop transitions, 11 changer transitions 0/95 dead transitions. [2025-01-10 00:56:22,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 95 transitions, 456 flow [2025-01-10 00:56:22,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-01-10 00:56:22,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-01-10 00:56:22,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 430 transitions. [2025-01-10 00:56:22,595 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45989304812834225 [2025-01-10 00:56:22,595 INFO L175 Difference]: Start difference. First operand has 95 places, 84 transitions, 292 flow. Second operand 11 states and 430 transitions. [2025-01-10 00:56:22,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 95 transitions, 456 flow [2025-01-10 00:56:22,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 95 transitions, 452 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-10 00:56:22,600 INFO L231 Difference]: Finished difference. Result has 104 places, 84 transitions, 314 flow [2025-01-10 00:56:22,600 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=314, PETRI_PLACES=104, PETRI_TRANSITIONS=84} [2025-01-10 00:56:22,601 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 20 predicate places. [2025-01-10 00:56:22,601 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 84 transitions, 314 flow [2025-01-10 00:56:22,601 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 34.0) internal successors, (340), 10 states have internal predecessors, (340), 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) [2025-01-10 00:56:22,601 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:56:22,602 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 00:56:22,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-01-10 00:56:22,802 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 [2025-01-10 00:56:22,802 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2025-01-10 00:56:22,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:56:22,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1879238406, now seen corresponding path program 1 times [2025-01-10 00:56:22,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 00:56:22,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1899016122] [2025-01-10 00:56:22,803 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 00:56:22,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:22,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:56:22,805 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) [2025-01-10 00:56:22,806 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 [2025-01-10 00:56:22,874 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-01-10 00:56:23,006 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-01-10 00:56:23,006 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:56:23,006 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:56:23,023 INFO L256 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-01-10 00:56:23,024 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:56:23,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-01-10 00:56:23,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:56:23,063 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 00:56:23,063 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 00:56:23,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899016122] [2025-01-10 00:56:23,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899016122] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 00:56:23,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 00:56:23,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-10 00:56:23,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468619073] [2025-01-10 00:56:23,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 00:56:23,064 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-10 00:56:23,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 00:56:23,064 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-10 00:56:23,064 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-10 00:56:23,142 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 85 [2025-01-10 00:56:23,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 84 transitions, 314 flow. Second operand has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 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) [2025-01-10 00:56:23,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:56:23,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 85 [2025-01-10 00:56:23,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:56:23,335 INFO L124 PetriNetUnfolderBase]: 390/897 cut-off events. [2025-01-10 00:56:23,335 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2025-01-10 00:56:23,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1638 conditions, 897 events. 390/897 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5215 event pairs, 287 based on Foata normal form. 8/765 useless extension candidates. Maximal degree in co-relation 1568. Up to 608 conditions per place. [2025-01-10 00:56:23,342 INFO L140 encePairwiseOnDemand]: 80/85 looper letters, 35 selfloop transitions, 9 changer transitions 0/82 dead transitions. [2025-01-10 00:56:23,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 82 transitions, 398 flow [2025-01-10 00:56:23,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-10 00:56:23,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-10 00:56:23,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 231 transitions. [2025-01-10 00:56:23,344 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6794117647058824 [2025-01-10 00:56:23,344 INFO L175 Difference]: Start difference. First operand has 104 places, 84 transitions, 314 flow. Second operand 4 states and 231 transitions. [2025-01-10 00:56:23,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 82 transitions, 398 flow [2025-01-10 00:56:23,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 82 transitions, 376 flow, removed 0 selfloop flow, removed 10 redundant places. [2025-01-10 00:56:23,347 INFO L231 Difference]: Finished difference. Result has 95 places, 82 transitions, 306 flow [2025-01-10 00:56:23,347 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=306, PETRI_PLACES=95, PETRI_TRANSITIONS=82} [2025-01-10 00:56:23,350 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 11 predicate places. [2025-01-10 00:56:23,350 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 82 transitions, 306 flow [2025-01-10 00:56:23,350 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 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) [2025-01-10 00:56:23,350 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:56:23,350 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 00:56:23,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-01-10 00:56:23,551 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 [2025-01-10 00:56:23,551 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2025-01-10 00:56:23,551 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:56:23,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1879238407, now seen corresponding path program 1 times [2025-01-10 00:56:23,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 00:56:23,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2001765917] [2025-01-10 00:56:23,552 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 00:56:23,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:23,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:56:23,554 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:56:23,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-01-10 00:56:23,631 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-01-10 00:56:23,771 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-01-10 00:56:23,771 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:56:23,771 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:56:23,786 INFO L256 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-10 00:56:23,787 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:56:23,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:56:23,812 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 00:56:23,812 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 00:56:23,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001765917] [2025-01-10 00:56:23,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001765917] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 00:56:23,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 00:56:23,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-10 00:56:23,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864816441] [2025-01-10 00:56:23,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 00:56:23,812 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-10 00:56:23,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 00:56:23,813 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-10 00:56:23,813 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-01-10 00:56:23,968 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 85 [2025-01-10 00:56:23,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 82 transitions, 306 flow. Second operand has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 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) [2025-01-10 00:56:23,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:56:23,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 85 [2025-01-10 00:56:23,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:56:24,240 INFO L124 PetriNetUnfolderBase]: 390/889 cut-off events. [2025-01-10 00:56:24,240 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2025-01-10 00:56:24,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1645 conditions, 889 events. 390/889 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5131 event pairs, 287 based on Foata normal form. 0/757 useless extension candidates. Maximal degree in co-relation 1580. Up to 610 conditions per place. [2025-01-10 00:56:24,246 INFO L140 encePairwiseOnDemand]: 79/85 looper letters, 38 selfloop transitions, 11 changer transitions 0/80 dead transitions. [2025-01-10 00:56:24,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 80 transitions, 400 flow [2025-01-10 00:56:24,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-10 00:56:24,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-01-10 00:56:24,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 264 transitions. [2025-01-10 00:56:24,248 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6211764705882353 [2025-01-10 00:56:24,248 INFO L175 Difference]: Start difference. First operand has 95 places, 82 transitions, 306 flow. Second operand 5 states and 264 transitions. [2025-01-10 00:56:24,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 80 transitions, 400 flow [2025-01-10 00:56:24,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 80 transitions, 382 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-01-10 00:56:24,251 INFO L231 Difference]: Finished difference. Result has 94 places, 80 transitions, 306 flow [2025-01-10 00:56:24,251 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=306, PETRI_PLACES=94, PETRI_TRANSITIONS=80} [2025-01-10 00:56:24,251 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 10 predicate places. [2025-01-10 00:56:24,251 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 80 transitions, 306 flow [2025-01-10 00:56:24,252 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 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) [2025-01-10 00:56:24,252 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:56:24,252 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 00:56:24,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-01-10 00:56:24,452 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 [2025-01-10 00:56:24,453 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2025-01-10 00:56:24,453 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:56:24,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1654793590, now seen corresponding path program 1 times [2025-01-10 00:56:24,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 00:56:24,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [14534939] [2025-01-10 00:56:24,454 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 00:56:24,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:24,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:56:24,456 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) [2025-01-10 00:56:24,457 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 [2025-01-10 00:56:24,529 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-01-10 00:56:24,656 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-01-10 00:56:24,656 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:56:24,656 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:56:24,672 INFO L256 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-01-10 00:56:24,673 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:56:24,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:56:24,690 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 00:56:24,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:56:24,710 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 00:56:24,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14534939] [2025-01-10 00:56:24,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14534939] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 00:56:24,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-10 00:56:24,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2025-01-10 00:56:24,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321816013] [2025-01-10 00:56:24,711 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-10 00:56:24,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-10 00:56:24,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 00:56:24,711 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-10 00:56:24,711 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-01-10 00:56:24,711 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 85 [2025-01-10 00:56:24,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 80 transitions, 306 flow. Second operand has 6 states, 6 states have (on average 54.833333333333336) internal successors, (329), 6 states have internal predecessors, (329), 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) [2025-01-10 00:56:24,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:56:24,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 85 [2025-01-10 00:56:24,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:56:25,051 INFO L124 PetriNetUnfolderBase]: 390/939 cut-off events. [2025-01-10 00:56:25,051 INFO L125 PetriNetUnfolderBase]: For 143/143 co-relation queries the response was YES. [2025-01-10 00:56:25,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1773 conditions, 939 events. 390/939 cut-off events. For 143/143 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5156 event pairs, 287 based on Foata normal form. 6/809 useless extension candidates. Maximal degree in co-relation 1701. Up to 604 conditions per place. [2025-01-10 00:56:25,059 INFO L140 encePairwiseOnDemand]: 81/85 looper letters, 52 selfloop transitions, 11 changer transitions 0/99 dead transitions. [2025-01-10 00:56:25,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 99 transitions, 560 flow [2025-01-10 00:56:25,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-10 00:56:25,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-01-10 00:56:25,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 364 transitions. [2025-01-10 00:56:25,061 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7137254901960784 [2025-01-10 00:56:25,061 INFO L175 Difference]: Start difference. First operand has 94 places, 80 transitions, 306 flow. Second operand 6 states and 364 transitions. [2025-01-10 00:56:25,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 99 transitions, 560 flow [2025-01-10 00:56:25,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 99 transitions, 506 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-01-10 00:56:25,064 INFO L231 Difference]: Finished difference. Result has 99 places, 85 transitions, 370 flow [2025-01-10 00:56:25,064 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=370, PETRI_PLACES=99, PETRI_TRANSITIONS=85} [2025-01-10 00:56:25,065 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 15 predicate places. [2025-01-10 00:56:25,065 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 85 transitions, 370 flow [2025-01-10 00:56:25,065 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.833333333333336) internal successors, (329), 6 states have internal predecessors, (329), 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) [2025-01-10 00:56:25,065 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:56:25,066 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 00:56:25,079 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-01-10 00:56:25,266 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 [2025-01-10 00:56:25,266 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2025-01-10 00:56:25,266 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:56:25,267 INFO L85 PathProgramCache]: Analyzing trace with hash -309530957, now seen corresponding path program 1 times [2025-01-10 00:56:25,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 00:56:25,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1663099861] [2025-01-10 00:56:25,267 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 00:56:25,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:25,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:56:25,271 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:56:25,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-01-10 00:56:25,373 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-01-10 00:56:25,530 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-01-10 00:56:25,530 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:56:25,530 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:56:25,549 INFO L256 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-01-10 00:56:25,551 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:56:25,668 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 23 treesize of output 1 [2025-01-10 00:56:25,720 INFO L349 Elim1Store]: treesize reduction 90, result has 30.2 percent of original size [2025-01-10 00:56:25,720 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 36 treesize of output 52 [2025-01-10 00:56:25,779 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 [2025-01-10 00:56:25,838 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 [2025-01-10 00:56:25,918 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 [2025-01-10 00:56:26,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2025-01-10 00:56:26,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:56:26,082 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 00:56:26,153 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_570 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_570) |c_~#c~0.base|) (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|))))))) is different from false [2025-01-10 00:56:26,523 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-10 00:56:26,524 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 29 treesize of output 30 [2025-01-10 00:56:26,542 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-10 00:56:26,542 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 52 treesize of output 55 [2025-01-10 00:56:26,554 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 20 treesize of output 14 [2025-01-10 00:56:55,475 INFO L349 Elim1Store]: treesize reduction 7, result has 96.7 percent of original size [2025-01-10 00:56:55,475 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 85 treesize of output 272 [2025-01-10 00:56:56,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2025-01-10 00:56:56,009 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 00:56:56,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663099861] [2025-01-10 00:56:56,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663099861] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 00:56:56,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-10 00:56:56,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2025-01-10 00:56:56,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109635181] [2025-01-10 00:56:56,009 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-10 00:56:56,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-01-10 00:56:56,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 00:56:56,010 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-01-10 00:56:56,010 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=308, Unknown=18, NotChecked=36, Total=420 [2025-01-10 00:56:56,191 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 85 [2025-01-10 00:56:56,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 85 transitions, 370 flow. Second operand has 21 states, 21 states have (on average 13.523809523809524) internal successors, (284), 21 states have internal predecessors, (284), 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) [2025-01-10 00:56:56,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:56:56,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 85 [2025-01-10 00:56:56,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:56:58,954 INFO L124 PetriNetUnfolderBase]: 1518/2697 cut-off events. [2025-01-10 00:56:58,955 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2025-01-10 00:56:58,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5325 conditions, 2697 events. 1518/2697 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 15314 event pairs, 1287 based on Foata normal form. 0/1899 useless extension candidates. Maximal degree in co-relation 5241. Up to 2340 conditions per place. [2025-01-10 00:56:58,969 INFO L140 encePairwiseOnDemand]: 77/85 looper letters, 59 selfloop transitions, 27 changer transitions 0/96 dead transitions. [2025-01-10 00:56:58,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 96 transitions, 582 flow [2025-01-10 00:56:58,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-01-10 00:56:58,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-01-10 00:56:58,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 226 transitions. [2025-01-10 00:56:58,972 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.20452488687782805 [2025-01-10 00:56:58,972 INFO L175 Difference]: Start difference. First operand has 99 places, 85 transitions, 370 flow. Second operand 13 states and 226 transitions. [2025-01-10 00:56:58,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 96 transitions, 582 flow [2025-01-10 00:56:58,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 96 transitions, 566 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-01-10 00:56:58,975 INFO L231 Difference]: Finished difference. Result has 111 places, 90 transitions, 434 flow [2025-01-10 00:56:58,975 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=434, PETRI_PLACES=111, PETRI_TRANSITIONS=90} [2025-01-10 00:56:58,975 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 27 predicate places. [2025-01-10 00:56:58,975 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 90 transitions, 434 flow [2025-01-10 00:56:58,975 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 13.523809523809524) internal successors, (284), 21 states have internal predecessors, (284), 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) [2025-01-10 00:56:58,975 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:56:58,975 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 00:56:58,989 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-01-10 00:56:59,176 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:59,176 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2025-01-10 00:56:59,176 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:56:59,176 INFO L85 PathProgramCache]: Analyzing trace with hash -309530956, now seen corresponding path program 1 times [2025-01-10 00:56:59,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 00:56:59,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [344400997] [2025-01-10 00:56:59,177 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 00:56:59,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:59,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:56:59,179 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:56:59,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-01-10 00:56:59,270 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-01-10 00:56:59,446 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-01-10 00:56:59,446 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:56:59,446 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:56:59,467 INFO L256 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 41 conjuncts are in the unsatisfiable core [2025-01-10 00:56:59,470 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:56:59,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-01-10 00:56:59,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2025-01-10 00:56:59,647 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 23 treesize of output 1 [2025-01-10 00:56:59,691 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-01-10 00:56:59,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2025-01-10 00:56:59,722 INFO L349 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2025-01-10 00:56:59,722 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 1 case distinctions, treesize of input 20 treesize of output 22 [2025-01-10 00:56:59,771 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 20 treesize of output 15 [2025-01-10 00:56:59,786 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 22 treesize of output 17 [2025-01-10 00:56:59,835 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 20 treesize of output 15 [2025-01-10 00:56:59,843 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 22 treesize of output 17 [2025-01-10 00:56:59,859 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 18 treesize of output 13 [2025-01-10 00:56:59,867 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 [2025-01-10 00:56:59,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2025-01-10 00:56:59,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2025-01-10 00:57:00,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:57:00,008 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 00:57:00,137 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|)))) (and (forall ((v_ArrVal_676 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_676) |c_~#c~0.base|) .cse1))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (forall ((v_ArrVal_676 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_677 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_676) |c_~#c~0.base|) .cse1)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_677) |c_~#c~0.base|) .cse1)))))) is different from false [2025-01-10 00:57:00,170 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|)))) (and (forall ((v_ArrVal_676 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_676) |c_~#c~0.base|) .cse1))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (forall ((v_ArrVal_676 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_677 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_676) |c_~#c~0.base|) .cse1)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_677) |c_~#c~0.base|) .cse1)))))) is different from false [2025-01-10 00:57:00,450 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-10 00:57:00,450 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 45 treesize of output 38 [2025-01-10 00:57:00,471 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-10 00:57:00,472 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 60 treesize of output 55 [2025-01-10 00:57:00,483 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 23 treesize of output 11 [2025-01-10 00:57:00,561 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-10 00:57:00,562 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 48 treesize of output 49 [2025-01-10 00:57:00,571 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-10 00:57:00,572 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 40 treesize of output 41 [2025-01-10 00:57:00,575 INFO L173 IndexEqualityManager]: detected equality via solver [2025-01-10 00:57:00,591 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-10 00:57:00,591 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 38 treesize of output 41 [2025-01-10 00:57:00,595 INFO L173 IndexEqualityManager]: detected equality via solver [2025-01-10 00:57:00,612 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-10 00:57:00,613 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 27 treesize of output 30 [2025-01-10 00:57:03,321 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-10 00:57:03,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 197 treesize of output 833