./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_90-arrayloop2_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/goblint-regression/28-race_reach_90-arrayloop2_racing.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f41f3c018db74ffccd5759d166eb9816a1bf73b1747e3e539ecb5bf51feb56af --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-09 01:17:32,315 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-09 01:17:32,364 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-09 01:17:32,368 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-09 01:17:32,368 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-09 01:17:32,392 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-09 01:17:32,393 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-09 01:17:32,393 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-09 01:17:32,394 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-09 01:17:32,394 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-09 01:17:32,395 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-09 01:17:32,395 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-09 01:17:32,395 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-09 01:17:32,395 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-09 01:17:32,395 INFO L153 SettingsManager]: * Use SBE=true [2025-03-09 01:17:32,395 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-09 01:17:32,395 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-09 01:17:32,395 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-09 01:17:32,395 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-09 01:17:32,395 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-09 01:17:32,395 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-09 01:17:32,395 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-09 01:17:32,396 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-09 01:17:32,396 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-09 01:17:32,396 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-09 01:17:32,396 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-09 01:17:32,396 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-09 01:17:32,396 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-09 01:17:32,396 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-09 01:17:32,396 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-09 01:17:32,396 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-09 01:17:32,396 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-09 01:17:32,396 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-09 01:17:32,396 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-09 01:17:32,396 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-09 01:17:32,396 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-09 01:17:32,396 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-09 01:17:32,396 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-09 01:17:32,396 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-09 01:17:32,396 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-09 01:17:32,396 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-09 01:17:32,396 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-09 01:17:32,396 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/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 -> f41f3c018db74ffccd5759d166eb9816a1bf73b1747e3e539ecb5bf51feb56af [2025-03-09 01:17:32,654 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-09 01:17:32,661 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-09 01:17:32,663 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-09 01:17:32,664 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-09 01:17:32,664 INFO L274 PluginConnector]: CDTParser initialized [2025-03-09 01:17:32,665 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_90-arrayloop2_racing.i [2025-03-09 01:17:33,876 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a75f8ede7/c82164fb2c2b4cb6a0e7b500ff0e74e9/FLAG91b6f2311 [2025-03-09 01:17:34,190 INFO L384 CDTParser]: Found 1 translation units. [2025-03-09 01:17:34,191 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_90-arrayloop2_racing.i [2025-03-09 01:17:34,210 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a75f8ede7/c82164fb2c2b4cb6a0e7b500ff0e74e9/FLAG91b6f2311 [2025-03-09 01:17:34,232 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a75f8ede7/c82164fb2c2b4cb6a0e7b500ff0e74e9 [2025-03-09 01:17:34,234 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-09 01:17:34,236 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-09 01:17:34,238 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-09 01:17:34,238 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-09 01:17:34,243 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-09 01:17:34,244 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.03 01:17:34" (1/1) ... [2025-03-09 01:17:34,246 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f7a3495 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:17:34, skipping insertion in model container [2025-03-09 01:17:34,247 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.03 01:17:34" (1/1) ... [2025-03-09 01:17:34,286 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-09 01:17:34,544 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:17:34,545 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:17:34,545 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:17:34,546 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:17:34,576 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-09 01:17:34,600 ERROR L321 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2025-03-09 01:17:34,600 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@20eb7489 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:17:34, skipping insertion in model container [2025-03-09 01:17:34,600 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-09 01:17:34,601 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2025-03-09 01:17:34,602 INFO L158 Benchmark]: Toolchain (without parser) took 365.92ms. Allocated memory is still 142.6MB. Free memory was 103.7MB in the beginning and 86.4MB in the end (delta: 17.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-09 01:17:34,602 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 192.9MB. Free memory is still 120.3MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-09 01:17:34,603 INFO L158 Benchmark]: CACSL2BoogieTranslator took 363.14ms. Allocated memory is still 142.6MB. Free memory was 103.7MB in the beginning and 86.4MB in the end (delta: 17.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-09 01:17:34,603 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 192.9MB. Free memory is still 120.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 363.14ms. Allocated memory is still 142.6MB. Free memory was 103.7MB in the beginning and 86.4MB in the end (delta: 17.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1044]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/goblint-regression/28-race_reach_90-arrayloop2_racing.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f41f3c018db74ffccd5759d166eb9816a1bf73b1747e3e539ecb5bf51feb56af --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-09 01:17:36,393 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-09 01:17:36,461 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2025-03-09 01:17:36,466 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-09 01:17:36,466 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-09 01:17:36,487 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-09 01:17:36,488 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-09 01:17:36,488 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-09 01:17:36,488 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-09 01:17:36,488 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-09 01:17:36,488 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-09 01:17:36,488 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-09 01:17:36,489 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-09 01:17:36,489 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-09 01:17:36,489 INFO L153 SettingsManager]: * Use SBE=true [2025-03-09 01:17:36,489 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-09 01:17:36,489 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-09 01:17:36,489 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-09 01:17:36,489 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-09 01:17:36,489 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-09 01:17:36,489 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-09 01:17:36,489 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-09 01:17:36,489 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-09 01:17:36,489 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-09 01:17:36,489 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-09 01:17:36,489 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2025-03-09 01:17:36,489 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2025-03-09 01:17:36,489 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-09 01:17:36,489 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-09 01:17:36,489 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-09 01:17:36,490 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-09 01:17:36,490 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-09 01:17:36,490 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-09 01:17:36,490 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-09 01:17:36,490 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-09 01:17:36,490 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-09 01:17:36,490 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-09 01:17:36,490 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-09 01:17:36,490 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2025-03-09 01:17:36,490 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2025-03-09 01:17:36,490 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-09 01:17:36,490 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-09 01:17:36,490 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-09 01:17:36,490 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-09 01:17:36,490 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f41f3c018db74ffccd5759d166eb9816a1bf73b1747e3e539ecb5bf51feb56af [2025-03-09 01:17:36,740 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-09 01:17:36,747 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-09 01:17:36,750 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-09 01:17:36,751 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-09 01:17:36,751 INFO L274 PluginConnector]: CDTParser initialized [2025-03-09 01:17:36,752 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_90-arrayloop2_racing.i [2025-03-09 01:17:37,964 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c231591f/fbf8bd45eddb476ab6c4969e8f9947a5/FLAG5bc2ac989 [2025-03-09 01:17:38,212 INFO L384 CDTParser]: Found 1 translation units. [2025-03-09 01:17:38,213 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_90-arrayloop2_racing.i [2025-03-09 01:17:38,227 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c231591f/fbf8bd45eddb476ab6c4969e8f9947a5/FLAG5bc2ac989 [2025-03-09 01:17:38,521 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c231591f/fbf8bd45eddb476ab6c4969e8f9947a5 [2025-03-09 01:17:38,523 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-09 01:17:38,524 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-09 01:17:38,525 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-09 01:17:38,525 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-09 01:17:38,528 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-09 01:17:38,529 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.03 01:17:38" (1/1) ... [2025-03-09 01:17:38,529 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b60074 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:17:38, skipping insertion in model container [2025-03-09 01:17:38,529 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.03 01:17:38" (1/1) ... [2025-03-09 01:17:38,560 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-09 01:17:38,817 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:17:38,817 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:17:38,818 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:17:38,818 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:17:38,858 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-09 01:17:38,897 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2025-03-09 01:17:38,907 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-09 01:17:38,944 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:17:38,945 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:17:38,945 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:17:38,946 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:17:38,963 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-09 01:17:38,977 INFO L200 MainTranslator]: Completed pre-run [2025-03-09 01:17:39,010 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:17:39,011 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:17:39,012 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:17:39,012 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:17:39,021 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-09 01:17:39,063 INFO L204 MainTranslator]: Completed translation [2025-03-09 01:17:39,063 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:17:39 WrapperNode [2025-03-09 01:17:39,063 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-09 01:17:39,064 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-09 01:17:39,064 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-09 01:17:39,064 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-09 01:17:39,068 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:17:39" (1/1) ... [2025-03-09 01:17:39,081 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:17:39" (1/1) ... [2025-03-09 01:17:39,107 INFO L138 Inliner]: procedures = 284, calls = 143, calls flagged for inlining = 11, calls inlined = 12, statements flattened = 355 [2025-03-09 01:17:39,108 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-09 01:17:39,108 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-09 01:17:39,108 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-09 01:17:39,109 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-09 01:17:39,115 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:17:39" (1/1) ... [2025-03-09 01:17:39,115 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:17:39" (1/1) ... [2025-03-09 01:17:39,123 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:17:39" (1/1) ... [2025-03-09 01:17:39,149 INFO L175 MemorySlicer]: Split 105 memory accesses to 5 slices as follows [2, 5, 2, 94, 2]. 90 percent of accesses are in the largest equivalence class. The 77 initializations are split as follows [2, 5, 0, 70, 0]. The 15 writes are split as follows [0, 0, 1, 13, 1]. [2025-03-09 01:17:39,149 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:17:39" (1/1) ... [2025-03-09 01:17:39,149 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:17:39" (1/1) ... [2025-03-09 01:17:39,165 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:17:39" (1/1) ... [2025-03-09 01:17:39,166 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:17:39" (1/1) ... [2025-03-09 01:17:39,169 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:17:39" (1/1) ... [2025-03-09 01:17:39,171 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:17:39" (1/1) ... [2025-03-09 01:17:39,174 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-09 01:17:39,174 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-09 01:17:39,174 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-09 01:17:39,175 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-09 01:17:39,175 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:17:39" (1/1) ... [2025-03-09 01:17:39,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-09 01:17:39,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:17:39,228 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-09 01:17:39,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-09 01:17:39,244 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2025-03-09 01:17:39,245 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2025-03-09 01:17:39,245 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2025-03-09 01:17:39,245 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2025-03-09 01:17:39,245 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#4 [2025-03-09 01:17:39,245 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-09 01:17:39,245 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-03-09 01:17:39,245 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2025-03-09 01:17:39,245 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2025-03-09 01:17:39,245 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2025-03-09 01:17:39,245 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2025-03-09 01:17:39,245 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2025-03-09 01:17:39,245 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2025-03-09 01:17:39,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-09 01:17:39,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2025-03-09 01:17:39,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2025-03-09 01:17:39,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2025-03-09 01:17:39,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2025-03-09 01:17:39,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#4 [2025-03-09 01:17:39,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2025-03-09 01:17:39,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2025-03-09 01:17:39,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2025-03-09 01:17:39,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2025-03-09 01:17:39,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2025-03-09 01:17:39,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2025-03-09 01:17:39,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2025-03-09 01:17:39,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2025-03-09 01:17:39,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2025-03-09 01:17:39,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#4 [2025-03-09 01:17:39,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#0 [2025-03-09 01:17:39,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#1 [2025-03-09 01:17:39,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#2 [2025-03-09 01:17:39,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#3 [2025-03-09 01:17:39,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#4 [2025-03-09 01:17:39,248 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-03-09 01:17:39,248 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2025-03-09 01:17:39,248 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2025-03-09 01:17:39,248 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-03-09 01:17:39,249 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-09 01:17:39,249 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-09 01:17:39,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-03-09 01:17:39,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2025-03-09 01:17:39,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2025-03-09 01:17:39,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2025-03-09 01:17:39,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2025-03-09 01:17:39,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-09 01:17:39,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-09 01:17:39,250 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-09 01:17:39,379 INFO L256 CfgBuilder]: Building ICFG [2025-03-09 01:17:39,380 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-09 01:17:40,130 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L1082: havoc main_~#t2_ids~0#1.base, main_~#t2_ids~0#1.offset; [2025-03-09 01:17:40,130 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L1082-1: SUMMARY for call ULTIMATE.dealloc(main_~#t2_ids~0#1.base, main_~#t2_ids~0#1.offset); srcloc: null [2025-03-09 01:17:40,130 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L1082-2: havoc main_~#t1_ids~0#1.base, main_~#t1_ids~0#1.offset; [2025-03-09 01:17:40,130 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L1082-3: SUMMARY for call ULTIMATE.dealloc(main_~#t1_ids~0#1.base, main_~#t1_ids~0#1.offset); srcloc: null [2025-03-09 01:17:40,131 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-09 01:17:40,131 INFO L307 CfgBuilder]: Performing block encoding [2025-03-09 01:17:41,536 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-09 01:17:41,537 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-09 01:17:41,537 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.03 01:17:41 BoogieIcfgContainer [2025-03-09 01:17:41,537 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-09 01:17:41,539 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-09 01:17:41,539 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-09 01:17:41,543 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-09 01:17:41,543 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.03 01:17:38" (1/3) ... [2025-03-09 01:17:41,545 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@90acdff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.03 01:17:41, skipping insertion in model container [2025-03-09 01:17:41,545 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:17:39" (2/3) ... [2025-03-09 01:17:41,545 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@90acdff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.03 01:17:41, skipping insertion in model container [2025-03-09 01:17:41,545 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.03 01:17:41" (3/3) ... [2025-03-09 01:17:41,546 INFO L128 eAbstractionObserver]: Analyzing ICFG 28-race_reach_90-arrayloop2_racing.i [2025-03-09 01:17:41,558 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-09 01:17:41,559 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 28-race_reach_90-arrayloop2_racing.i that has 3 procedures, 168 locations, 1 initial locations, 18 loop locations, and 59 error locations. [2025-03-09 01:17:41,560 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-09 01:17:41,652 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-03-09 01:17:41,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 205 transitions, 430 flow [2025-03-09 01:17:41,784 INFO L124 PetriNetUnfolderBase]: 55/340 cut-off events. [2025-03-09 01:17:41,788 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-03-09 01:17:41,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 357 conditions, 340 events. 55/340 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1950 event pairs, 0 based on Foata normal form. 0/182 useless extension candidates. Maximal degree in co-relation 187. Up to 8 conditions per place. [2025-03-09 01:17:41,797 INFO L82 GeneralOperation]: Start removeDead. Operand has 174 places, 205 transitions, 430 flow [2025-03-09 01:17:41,806 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 174 places, 205 transitions, 430 flow [2025-03-09 01:17:41,813 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-09 01:17:41,823 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;@5557a275, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-09 01:17:41,823 INFO L334 AbstractCegarLoop]: Starting to check reachability of 91 error locations. [2025-03-09 01:17:41,832 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-09 01:17:41,832 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2025-03-09 01:17:41,832 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-09 01:17:41,833 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:17:41,833 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-09 01:17:41,834 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-03-09 01:17:41,837 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:17:41,839 INFO L85 PathProgramCache]: Analyzing trace with hash 949740, now seen corresponding path program 1 times [2025-03-09 01:17:41,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:17:41,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1736488483] [2025-03-09 01:17:41,851 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:17:41,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:41,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:17:41,854 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:17:41,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-09 01:17:41,963 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-09 01:17:42,079 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-09 01:17:42,080 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:17:42,080 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:17:42,096 INFO L256 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-09 01:17:42,099 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:17:42,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:17:42,142 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:17:42,142 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:17:42,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736488483] [2025-03-09 01:17:42,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736488483] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:17:42,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:17:42,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-09 01:17:42,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770082875] [2025-03-09 01:17:42,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:17:42,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 01:17:42,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:17:42,164 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 01:17:42,166 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-09 01:17:42,386 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 205 [2025-03-09 01:17:42,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 205 transitions, 430 flow. Second operand has 4 states, 4 states have (on average 102.75) internal successors, (411), 4 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:42,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:17:42,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 205 [2025-03-09 01:17:42,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:17:44,366 INFO L124 PetriNetUnfolderBase]: 6915/16116 cut-off events. [2025-03-09 01:17:44,367 INFO L125 PetriNetUnfolderBase]: For 309/333 co-relation queries the response was YES. [2025-03-09 01:17:44,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26599 conditions, 16116 events. 6915/16116 cut-off events. For 309/333 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 158216 event pairs, 4107 based on Foata normal form. 2440/15990 useless extension candidates. Maximal degree in co-relation 25333. Up to 7199 conditions per place. [2025-03-09 01:17:44,467 INFO L140 encePairwiseOnDemand]: 173/205 looper letters, 115 selfloop transitions, 4 changer transitions 0/221 dead transitions. [2025-03-09 01:17:44,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 221 transitions, 700 flow [2025-03-09 01:17:44,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 01:17:44,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 01:17:44,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 579 transitions. [2025-03-09 01:17:44,479 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7060975609756097 [2025-03-09 01:17:44,480 INFO L175 Difference]: Start difference. First operand has 174 places, 205 transitions, 430 flow. Second operand 4 states and 579 transitions. [2025-03-09 01:17:44,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 221 transitions, 700 flow [2025-03-09 01:17:44,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 221 transitions, 700 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-09 01:17:44,491 INFO L231 Difference]: Finished difference. Result has 174 places, 177 transitions, 390 flow [2025-03-09 01:17:44,493 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=390, PETRI_PLACES=174, PETRI_TRANSITIONS=177} [2025-03-09 01:17:44,497 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, 0 predicate places. [2025-03-09 01:17:44,497 INFO L471 AbstractCegarLoop]: Abstraction has has 174 places, 177 transitions, 390 flow [2025-03-09 01:17:44,497 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 102.75) internal successors, (411), 4 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:44,497 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:17:44,498 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-09 01:17:44,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-09 01:17:44,699 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:44,699 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-03-09 01:17:44,700 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:17:44,700 INFO L85 PathProgramCache]: Analyzing trace with hash 949741, now seen corresponding path program 1 times [2025-03-09 01:17:44,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:17:44,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [636778779] [2025-03-09 01:17:44,701 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:17:44,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:44,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:17:44,703 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:17:44,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-09 01:17:44,785 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-09 01:17:44,935 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-09 01:17:44,936 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:17:44,936 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:17:44,956 INFO L256 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-09 01:17:44,958 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:17:45,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:17:45,004 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:17:45,004 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:17:45,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636778779] [2025-03-09 01:17:45,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636778779] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:17:45,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:17:45,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-09 01:17:45,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507018244] [2025-03-09 01:17:45,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:17:45,006 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 01:17:45,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:17:45,007 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 01:17:45,007 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-09 01:17:45,233 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 205 [2025-03-09 01:17:45,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 177 transitions, 390 flow. Second operand has 4 states, 4 states have (on average 104.75) internal successors, (419), 4 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:45,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:17:45,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 205 [2025-03-09 01:17:45,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:17:46,524 INFO L124 PetriNetUnfolderBase]: 6854/17172 cut-off events. [2025-03-09 01:17:46,525 INFO L125 PetriNetUnfolderBase]: For 728/752 co-relation queries the response was YES. [2025-03-09 01:17:46,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28432 conditions, 17172 events. 6854/17172 cut-off events. For 728/752 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 175673 event pairs, 5821 based on Foata normal form. 3/14405 useless extension candidates. Maximal degree in co-relation 27068. Up to 10124 conditions per place. [2025-03-09 01:17:46,613 INFO L140 encePairwiseOnDemand]: 197/205 looper letters, 74 selfloop transitions, 5 changer transitions 0/181 dead transitions. [2025-03-09 01:17:46,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 181 transitions, 562 flow [2025-03-09 01:17:46,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 01:17:46,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 01:17:46,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 498 transitions. [2025-03-09 01:17:46,615 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6073170731707317 [2025-03-09 01:17:46,615 INFO L175 Difference]: Start difference. First operand has 174 places, 177 transitions, 390 flow. Second operand 4 states and 498 transitions. [2025-03-09 01:17:46,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 181 transitions, 562 flow [2025-03-09 01:17:46,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 181 transitions, 550 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-09 01:17:46,627 INFO L231 Difference]: Finished difference. Result has 176 places, 181 transitions, 423 flow [2025-03-09 01:17:46,627 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=423, PETRI_PLACES=176, PETRI_TRANSITIONS=181} [2025-03-09 01:17:46,628 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, 2 predicate places. [2025-03-09 01:17:46,628 INFO L471 AbstractCegarLoop]: Abstraction has has 176 places, 181 transitions, 423 flow [2025-03-09 01:17:46,628 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 104.75) internal successors, (419), 4 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:46,628 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:17:46,628 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-03-09 01:17:46,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-09 01:17:46,833 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:46,833 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-03-09 01:17:46,834 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:17:46,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1770152570, now seen corresponding path program 1 times [2025-03-09 01:17:46,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:17:46,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1677853954] [2025-03-09 01:17:46,835 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:17:46,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:46,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:17:46,837 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:17:46,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-09 01:17:46,913 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-09 01:17:47,031 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-09 01:17:47,031 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:17:47,031 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:17:47,049 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-09 01:17:47,051 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:17:47,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-09 01:17:47,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:17:47,083 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:17:47,083 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:17:47,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677853954] [2025-03-09 01:17:47,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677853954] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:17:47,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:17:47,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-09 01:17:47,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200032118] [2025-03-09 01:17:47,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:17:47,084 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-09 01:17:47,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:17:47,084 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-09 01:17:47,084 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-09 01:17:47,228 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 205 [2025-03-09 01:17:47,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 181 transitions, 423 flow. Second operand has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:47,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:17:47,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 205 [2025-03-09 01:17:47,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:17:48,568 INFO L124 PetriNetUnfolderBase]: 6854/17143 cut-off events. [2025-03-09 01:17:48,569 INFO L125 PetriNetUnfolderBase]: For 314/358 co-relation queries the response was YES. [2025-03-09 01:17:48,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27906 conditions, 17143 events. 6854/17143 cut-off events. For 314/358 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 175355 event pairs, 5821 based on Foata normal form. 0/14380 useless extension candidates. Maximal degree in co-relation 27872. Up to 10099 conditions per place. [2025-03-09 01:17:48,788 INFO L140 encePairwiseOnDemand]: 202/205 looper letters, 72 selfloop transitions, 3 changer transitions 0/180 dead transitions. [2025-03-09 01:17:48,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 180 transitions, 571 flow [2025-03-09 01:17:48,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-09 01:17:48,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-09 01:17:48,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 393 transitions. [2025-03-09 01:17:48,790 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6390243902439025 [2025-03-09 01:17:48,791 INFO L175 Difference]: Start difference. First operand has 176 places, 181 transitions, 423 flow. Second operand 3 states and 393 transitions. [2025-03-09 01:17:48,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 180 transitions, 571 flow [2025-03-09 01:17:48,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 180 transitions, 568 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-09 01:17:48,798 INFO L231 Difference]: Finished difference. Result has 176 places, 180 transitions, 424 flow [2025-03-09 01:17:48,799 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=424, PETRI_PLACES=176, PETRI_TRANSITIONS=180} [2025-03-09 01:17:48,799 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, 2 predicate places. [2025-03-09 01:17:48,800 INFO L471 AbstractCegarLoop]: Abstraction has has 176 places, 180 transitions, 424 flow [2025-03-09 01:17:48,800 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:48,800 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:17:48,800 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-03-09 01:17:48,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-09 01:17:49,000 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:49,001 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-03-09 01:17:49,002 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:17:49,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1770152571, now seen corresponding path program 1 times [2025-03-09 01:17:49,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:17:49,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [733440542] [2025-03-09 01:17:49,002 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:17:49,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:49,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:17:49,004 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:17:49,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-09 01:17:49,092 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-09 01:17:49,210 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-09 01:17:49,211 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:17:49,211 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:17:49,229 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-09 01:17:49,230 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:17:49,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2025-03-09 01:17:49,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:17:49,243 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:17:49,243 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:17:49,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733440542] [2025-03-09 01:17:49,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733440542] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:17:49,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:17:49,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-09 01:17:49,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134210490] [2025-03-09 01:17:49,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:17:49,243 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-09 01:17:49,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:17:49,243 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-09 01:17:49,243 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-09 01:17:49,338 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 205 [2025-03-09 01:17:49,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 180 transitions, 424 flow. Second operand has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:49,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:17:49,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 205 [2025-03-09 01:17:49,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:17:50,329 INFO L124 PetriNetUnfolderBase]: 6854/17142 cut-off events. [2025-03-09 01:17:50,330 INFO L125 PetriNetUnfolderBase]: For 316/360 co-relation queries the response was YES. [2025-03-09 01:17:50,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27906 conditions, 17142 events. 6854/17142 cut-off events. For 316/360 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 175382 event pairs, 5821 based on Foata normal form. 0/14381 useless extension candidates. Maximal degree in co-relation 27871. Up to 10099 conditions per place. [2025-03-09 01:17:50,402 INFO L140 encePairwiseOnDemand]: 202/205 looper letters, 72 selfloop transitions, 3 changer transitions 0/179 dead transitions. [2025-03-09 01:17:50,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 179 transitions, 572 flow [2025-03-09 01:17:50,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-09 01:17:50,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-09 01:17:50,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 393 transitions. [2025-03-09 01:17:50,404 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6390243902439025 [2025-03-09 01:17:50,404 INFO L175 Difference]: Start difference. First operand has 176 places, 180 transitions, 424 flow. Second operand 3 states and 393 transitions. [2025-03-09 01:17:50,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 179 transitions, 572 flow [2025-03-09 01:17:50,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 179 transitions, 566 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-09 01:17:50,407 INFO L231 Difference]: Finished difference. Result has 175 places, 179 transitions, 422 flow [2025-03-09 01:17:50,408 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=422, PETRI_PLACES=175, PETRI_TRANSITIONS=179} [2025-03-09 01:17:50,408 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, 1 predicate places. [2025-03-09 01:17:50,408 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 179 transitions, 422 flow [2025-03-09 01:17:50,408 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:50,409 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:17:50,409 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:17:50,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-09 01:17:50,613 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:50,613 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-03-09 01:17:50,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:17:50,613 INFO L85 PathProgramCache]: Analyzing trace with hash 959846079, now seen corresponding path program 1 times [2025-03-09 01:17:50,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:17:50,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2039644095] [2025-03-09 01:17:50,615 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:17:50,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:50,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:17:50,617 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:17:50,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-09 01:17:50,695 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-09 01:17:50,809 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-09 01:17:50,809 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:17:50,809 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:17:50,826 INFO L256 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-09 01:17:50,826 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:17:50,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2025-03-09 01:17:50,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:17:50,841 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:17:50,841 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:17:50,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039644095] [2025-03-09 01:17:50,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039644095] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:17:50,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:17:50,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-09 01:17:50,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120874395] [2025-03-09 01:17:50,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:17:50,842 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 01:17:50,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:17:50,842 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 01:17:50,842 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-09 01:17:51,053 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 205 [2025-03-09 01:17:51,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 179 transitions, 422 flow. Second operand has 4 states, 4 states have (on average 102.75) internal successors, (411), 4 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:51,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:17:51,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 205 [2025-03-09 01:17:51,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:17:52,174 INFO L124 PetriNetUnfolderBase]: 6854/17140 cut-off events. [2025-03-09 01:17:52,174 INFO L125 PetriNetUnfolderBase]: For 310/354 co-relation queries the response was YES. [2025-03-09 01:17:52,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27907 conditions, 17140 events. 6854/17140 cut-off events. For 310/354 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 175354 event pairs, 5821 based on Foata normal form. 1/14383 useless extension candidates. Maximal degree in co-relation 27871. Up to 10099 conditions per place. [2025-03-09 01:17:52,257 INFO L140 encePairwiseOnDemand]: 198/205 looper letters, 70 selfloop transitions, 7 changer transitions 0/177 dead transitions. [2025-03-09 01:17:52,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 177 transitions, 572 flow [2025-03-09 01:17:52,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-09 01:17:52,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-09 01:17:52,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 580 transitions. [2025-03-09 01:17:52,260 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5658536585365853 [2025-03-09 01:17:52,260 INFO L175 Difference]: Start difference. First operand has 175 places, 179 transitions, 422 flow. Second operand 5 states and 580 transitions. [2025-03-09 01:17:52,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 177 transitions, 572 flow [2025-03-09 01:17:52,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 177 transitions, 566 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-09 01:17:52,263 INFO L231 Difference]: Finished difference. Result has 175 places, 177 transitions, 426 flow [2025-03-09 01:17:52,264 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=426, PETRI_PLACES=175, PETRI_TRANSITIONS=177} [2025-03-09 01:17:52,264 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, 1 predicate places. [2025-03-09 01:17:52,264 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 177 transitions, 426 flow [2025-03-09 01:17:52,265 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 102.75) internal successors, (411), 4 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:52,265 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:17:52,265 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:17:52,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-09 01:17:52,465 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:52,465 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-03-09 01:17:52,466 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:17:52,466 INFO L85 PathProgramCache]: Analyzing trace with hash 959846080, now seen corresponding path program 1 times [2025-03-09 01:17:52,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:17:52,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1745382545] [2025-03-09 01:17:52,466 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:17:52,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:52,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:17:52,471 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:17:52,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-09 01:17:52,541 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-09 01:17:52,674 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-09 01:17:52,674 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:17:52,674 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:17:52,690 INFO L256 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-09 01:17:52,691 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:17:52,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-09 01:17:52,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:17:52,718 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:17:52,718 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:17:52,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745382545] [2025-03-09 01:17:52,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745382545] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:17:52,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:17:52,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-09 01:17:52,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477802449] [2025-03-09 01:17:52,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:17:52,719 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 01:17:52,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:17:52,719 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 01:17:52,719 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-09 01:17:52,908 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 205 [2025-03-09 01:17:52,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 177 transitions, 426 flow. Second operand has 4 states, 4 states have (on average 104.5) internal successors, (418), 4 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:52,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:17:52,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 205 [2025-03-09 01:17:52,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:17:54,250 INFO L124 PetriNetUnfolderBase]: 6854/17138 cut-off events. [2025-03-09 01:17:54,250 INFO L125 PetriNetUnfolderBase]: For 316/360 co-relation queries the response was YES. [2025-03-09 01:17:54,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27909 conditions, 17138 events. 6854/17138 cut-off events. For 316/360 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 175318 event pairs, 5821 based on Foata normal form. 2/14382 useless extension candidates. Maximal degree in co-relation 27869. Up to 10101 conditions per place. [2025-03-09 01:17:54,326 INFO L140 encePairwiseOnDemand]: 200/205 looper letters, 73 selfloop transitions, 4 changer transitions 0/175 dead transitions. [2025-03-09 01:17:54,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 175 transitions, 576 flow [2025-03-09 01:17:54,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 01:17:54,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 01:17:54,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 487 transitions. [2025-03-09 01:17:54,328 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5939024390243902 [2025-03-09 01:17:54,328 INFO L175 Difference]: Start difference. First operand has 175 places, 177 transitions, 426 flow. Second operand 4 states and 487 transitions. [2025-03-09 01:17:54,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 175 transitions, 576 flow [2025-03-09 01:17:54,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 175 transitions, 562 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-09 01:17:54,331 INFO L231 Difference]: Finished difference. Result has 172 places, 175 transitions, 416 flow [2025-03-09 01:17:54,332 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=416, PETRI_PLACES=172, PETRI_TRANSITIONS=175} [2025-03-09 01:17:54,332 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, -2 predicate places. [2025-03-09 01:17:54,332 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 175 transitions, 416 flow [2025-03-09 01:17:54,332 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 104.5) internal successors, (418), 4 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:54,332 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:17:54,333 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2025-03-09 01:17:54,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-09 01:17:54,533 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:54,534 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-03-09 01:17:54,534 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:17:54,534 INFO L85 PathProgramCache]: Analyzing trace with hash 959844397, now seen corresponding path program 1 times [2025-03-09 01:17:54,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:17:54,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1761736297] [2025-03-09 01:17:54,535 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:17:54,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:54,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:17:54,537 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:17:54,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-09 01:17:54,606 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-09 01:17:54,717 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-09 01:17:54,717 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:17:54,717 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:17:54,730 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-03-09 01:17:54,731 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:17:54,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:17:54,739 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:17:54,739 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:17:54,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761736297] [2025-03-09 01:17:54,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761736297] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:17:54,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:17:54,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-09 01:17:54,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220186394] [2025-03-09 01:17:54,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:17:54,739 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-09 01:17:54,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:17:54,740 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-09 01:17:54,740 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-09 01:17:54,740 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 205 [2025-03-09 01:17:54,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 175 transitions, 416 flow. Second operand has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 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) [2025-03-09 01:17:54,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:17:54,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 205 [2025-03-09 01:17:54,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:17:55,819 INFO L124 PetriNetUnfolderBase]: 6853/17156 cut-off events. [2025-03-09 01:17:55,819 INFO L125 PetriNetUnfolderBase]: For 318/362 co-relation queries the response was YES. [2025-03-09 01:17:55,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27928 conditions, 17156 events. 6853/17156 cut-off events. For 318/362 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 175236 event pairs, 5821 based on Foata normal form. 2/14392 useless extension candidates. Maximal degree in co-relation 27896. Up to 10099 conditions per place. [2025-03-09 01:17:55,890 INFO L140 encePairwiseOnDemand]: 202/205 looper letters, 76 selfloop transitions, 3 changer transitions 0/179 dead transitions. [2025-03-09 01:17:55,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 179 transitions, 588 flow [2025-03-09 01:17:55,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-09 01:17:55,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-09 01:17:55,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 401 transitions. [2025-03-09 01:17:55,891 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6520325203252032 [2025-03-09 01:17:55,891 INFO L175 Difference]: Start difference. First operand has 172 places, 175 transitions, 416 flow. Second operand 3 states and 401 transitions. [2025-03-09 01:17:55,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 179 transitions, 588 flow [2025-03-09 01:17:55,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 179 transitions, 574 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-09 01:17:55,894 INFO L231 Difference]: Finished difference. Result has 172 places, 175 transitions, 419 flow [2025-03-09 01:17:55,895 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=419, PETRI_PLACES=172, PETRI_TRANSITIONS=175} [2025-03-09 01:17:55,895 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, -2 predicate places. [2025-03-09 01:17:55,895 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 175 transitions, 419 flow [2025-03-09 01:17:55,895 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 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) [2025-03-09 01:17:55,895 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:17:55,895 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:17:55,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-09 01:17:56,096 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:56,096 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-03-09 01:17:56,096 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:17:56,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1005859412, now seen corresponding path program 1 times [2025-03-09 01:17:56,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:17:56,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [657304258] [2025-03-09 01:17:56,097 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:17:56,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:56,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:17:56,098 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:17:56,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-09 01:17:56,167 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-09 01:17:56,304 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-09 01:17:56,304 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:17:56,304 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:17:56,322 INFO L256 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-09 01:17:56,326 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:17:56,372 INFO L349 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2025-03-09 01:17:56,372 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 [2025-03-09 01:17:56,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:17:56,433 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:17:56,433 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:17:56,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657304258] [2025-03-09 01:17:56,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657304258] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:17:56,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:17:56,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-09 01:17:56,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517134891] [2025-03-09 01:17:56,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:17:56,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-09 01:17:56,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:17:56,434 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-09 01:17:56,434 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-09 01:17:56,877 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 205 [2025-03-09 01:17:56,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 175 transitions, 419 flow. Second operand has 6 states, 6 states have (on average 103.5) internal successors, (621), 6 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:56,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:17:56,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 205 [2025-03-09 01:17:56,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:17:58,004 INFO L124 PetriNetUnfolderBase]: 6909/16083 cut-off events. [2025-03-09 01:17:58,005 INFO L125 PetriNetUnfolderBase]: For 367/411 co-relation queries the response was YES. [2025-03-09 01:17:58,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27158 conditions, 16083 events. 6909/16083 cut-off events. For 367/411 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 157484 event pairs, 4107 based on Foata normal form. 2/13631 useless extension candidates. Maximal degree in co-relation 27123. Up to 7191 conditions per place. [2025-03-09 01:17:58,189 INFO L140 encePairwiseOnDemand]: 199/205 looper letters, 118 selfloop transitions, 5 changer transitions 0/217 dead transitions. [2025-03-09 01:17:58,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 217 transitions, 749 flow [2025-03-09 01:17:58,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 01:17:58,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 01:17:58,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 529 transitions. [2025-03-09 01:17:58,191 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6451219512195122 [2025-03-09 01:17:58,191 INFO L175 Difference]: Start difference. First operand has 172 places, 175 transitions, 419 flow. Second operand 4 states and 529 transitions. [2025-03-09 01:17:58,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 217 transitions, 749 flow [2025-03-09 01:17:58,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 217 transitions, 746 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-09 01:17:58,196 INFO L231 Difference]: Finished difference. Result has 172 places, 173 transitions, 422 flow [2025-03-09 01:17:58,197 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=422, PETRI_PLACES=172, PETRI_TRANSITIONS=173} [2025-03-09 01:17:58,197 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, -2 predicate places. [2025-03-09 01:17:58,198 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 173 transitions, 422 flow [2025-03-09 01:17:58,198 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 103.5) internal successors, (621), 6 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:58,198 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:17:58,198 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:17:58,215 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-09 01:17:58,399 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:58,399 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-03-09 01:17:58,400 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:17:58,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1005859411, now seen corresponding path program 1 times [2025-03-09 01:17:58,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:17:58,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1626329880] [2025-03-09 01:17:58,400 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:17:58,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:58,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:17:58,403 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:17:58,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-09 01:17:58,486 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-09 01:17:58,634 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-09 01:17:58,634 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:17:58,634 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:17:58,660 INFO L256 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-09 01:17:58,662 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:17:58,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-09 01:17:58,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-03-09 01:17:58,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:17:58,783 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:17:58,783 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:17:58,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626329880] [2025-03-09 01:17:58,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626329880] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:17:58,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:17:58,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-09 01:17:58,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219280122] [2025-03-09 01:17:58,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:17:58,783 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-09 01:17:58,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:17:58,784 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-09 01:17:58,784 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-09 01:17:59,101 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 205 [2025-03-09 01:17:59,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 173 transitions, 422 flow. Second operand has 5 states, 5 states have (on average 105.4) internal successors, (527), 5 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:59,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:17:59,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 205 [2025-03-09 01:17:59,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:18:00,234 INFO L124 PetriNetUnfolderBase]: 6992/17493 cut-off events. [2025-03-09 01:18:00,234 INFO L125 PetriNetUnfolderBase]: For 829/873 co-relation queries the response was YES. [2025-03-09 01:18:00,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29075 conditions, 17493 events. 6992/17493 cut-off events. For 829/873 co-relation queries the response was YES. Maximal size of possible extension queue 628. Compared 179426 event pairs, 5947 based on Foata normal form. 2/14691 useless extension candidates. Maximal degree in co-relation 28983. Up to 10332 conditions per place. [2025-03-09 01:18:00,331 INFO L140 encePairwiseOnDemand]: 199/205 looper letters, 81 selfloop transitions, 5 changer transitions 0/180 dead transitions. [2025-03-09 01:18:00,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 180 transitions, 624 flow [2025-03-09 01:18:00,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 01:18:00,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 01:18:00,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 501 transitions. [2025-03-09 01:18:00,333 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6109756097560975 [2025-03-09 01:18:00,333 INFO L175 Difference]: Start difference. First operand has 172 places, 173 transitions, 422 flow. Second operand 4 states and 501 transitions. [2025-03-09 01:18:00,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 180 transitions, 624 flow [2025-03-09 01:18:00,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 180 transitions, 608 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-09 01:18:00,342 INFO L231 Difference]: Finished difference. Result has 174 places, 177 transitions, 458 flow [2025-03-09 01:18:00,342 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=458, PETRI_PLACES=174, PETRI_TRANSITIONS=177} [2025-03-09 01:18:00,342 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, 0 predicate places. [2025-03-09 01:18:00,342 INFO L471 AbstractCegarLoop]: Abstraction has has 174 places, 177 transitions, 458 flow [2025-03-09 01:18:00,343 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.4) internal successors, (527), 5 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:18:00,343 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:18:00,343 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:18:00,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-09 01:18:00,543 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:18:00,543 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-03-09 01:18:00,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:18:00,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1116869761, now seen corresponding path program 1 times [2025-03-09 01:18:00,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:18:00,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [963632603] [2025-03-09 01:18:00,544 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:18:00,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:18:00,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:18:00,546 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:18:00,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-09 01:18:00,614 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-09 01:18:00,761 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-09 01:18:00,761 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:18:00,761 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:18:00,780 INFO L256 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 36 conjuncts are in the unsatisfiable core [2025-03-09 01:18:00,784 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:18:00,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-09 01:18:00,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-09 01:18:00,915 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 [2025-03-09 01:18:00,932 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 [2025-03-09 01:18:00,992 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-03-09 01:18:00,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2025-03-09 01:18:00,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-03-09 01:18:01,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-09 01:18:01,060 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 [2025-03-09 01:18:01,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-09 01:18:01,117 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 [2025-03-09 01:18:01,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-09 01:18:01,167 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 [2025-03-09 01:18:01,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:18:01,223 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:18:01,223 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:18:01,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963632603] [2025-03-09 01:18:01,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963632603] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:18:01,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:18:01,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-09 01:18:01,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837126390] [2025-03-09 01:18:01,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:18:01,224 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-09 01:18:01,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:18:01,224 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-09 01:18:01,224 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-03-09 01:18:02,761 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 205 [2025-03-09 01:18:02,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 177 transitions, 458 flow. Second operand has 10 states, 10 states have (on average 90.0) internal successors, (900), 10 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:18:02,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:18:02,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 205 [2025-03-09 01:18:02,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:18:04,144 INFO L124 PetriNetUnfolderBase]: 6992/17492 cut-off events. [2025-03-09 01:18:04,144 INFO L125 PetriNetUnfolderBase]: For 397/441 co-relation queries the response was YES. [2025-03-09 01:18:04,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28626 conditions, 17492 events. 6992/17492 cut-off events. For 397/441 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 179573 event pairs, 5947 based on Foata normal form. 0/14703 useless extension candidates. Maximal degree in co-relation 28533. Up to 10345 conditions per place. [2025-03-09 01:18:04,257 INFO L140 encePairwiseOnDemand]: 193/205 looper letters, 96 selfloop transitions, 11 changer transitions 0/193 dead transitions. [2025-03-09 01:18:04,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 193 transitions, 710 flow [2025-03-09 01:18:04,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-09 01:18:04,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-09 01:18:04,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1086 transitions. [2025-03-09 01:18:04,259 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4815964523281596 [2025-03-09 01:18:04,259 INFO L175 Difference]: Start difference. First operand has 174 places, 177 transitions, 458 flow. Second operand 11 states and 1086 transitions. [2025-03-09 01:18:04,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 193 transitions, 710 flow [2025-03-09 01:18:04,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 193 transitions, 708 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-09 01:18:04,263 INFO L231 Difference]: Finished difference. Result has 188 places, 182 transitions, 514 flow [2025-03-09 01:18:04,263 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=514, PETRI_PLACES=188, PETRI_TRANSITIONS=182} [2025-03-09 01:18:04,264 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, 14 predicate places. [2025-03-09 01:18:04,264 INFO L471 AbstractCegarLoop]: Abstraction has has 188 places, 182 transitions, 514 flow [2025-03-09 01:18:04,264 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 90.0) internal successors, (900), 10 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:18:04,264 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:18:04,265 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:18:04,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-09 01:18:04,465 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:18:04,465 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-03-09 01:18:04,465 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:18:04,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1116869762, now seen corresponding path program 1 times [2025-03-09 01:18:04,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:18:04,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1004925553] [2025-03-09 01:18:04,466 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:18:04,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:18:04,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:18:04,468 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:18:04,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-09 01:18:04,547 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-09 01:18:04,688 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-09 01:18:04,689 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:18:04,689 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:18:04,710 INFO L256 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-09 01:18:04,712 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:18:04,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-09 01:18:04,819 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 [2025-03-09 01:18:04,864 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-03-09 01:18:04,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2025-03-09 01:18:04,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-09 01:18:04,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-09 01:18:04,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-09 01:18:04,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:18:04,972 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:18:04,972 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:18:04,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004925553] [2025-03-09 01:18:04,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004925553] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:18:04,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:18:04,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-09 01:18:04,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801227584] [2025-03-09 01:18:04,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:18:04,973 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-09 01:18:04,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:18:04,973 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-09 01:18:04,973 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2025-03-09 01:18:06,144 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 205 [2025-03-09 01:18:06,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 182 transitions, 514 flow. Second operand has 10 states, 10 states have (on average 92.0) internal successors, (920), 10 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:18:06,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:18:06,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 205 [2025-03-09 01:18:06,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:18:07,702 INFO L124 PetriNetUnfolderBase]: 6992/17491 cut-off events. [2025-03-09 01:18:07,702 INFO L125 PetriNetUnfolderBase]: For 408/452 co-relation queries the response was YES. [2025-03-09 01:18:07,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28655 conditions, 17491 events. 6992/17491 cut-off events. For 408/452 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 179632 event pairs, 5947 based on Foata normal form. 1/14706 useless extension candidates. Maximal degree in co-relation 28574. Up to 10341 conditions per place. [2025-03-09 01:18:07,810 INFO L140 encePairwiseOnDemand]: 193/205 looper letters, 94 selfloop transitions, 11 changer transitions 0/193 dead transitions. [2025-03-09 01:18:07,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 193 transitions, 754 flow [2025-03-09 01:18:07,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-09 01:18:07,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-09 01:18:07,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1106 transitions. [2025-03-09 01:18:07,813 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4904656319290466 [2025-03-09 01:18:07,813 INFO L175 Difference]: Start difference. First operand has 188 places, 182 transitions, 514 flow. Second operand 11 states and 1106 transitions. [2025-03-09 01:18:07,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 193 transitions, 754 flow [2025-03-09 01:18:07,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 193 transitions, 750 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-09 01:18:07,818 INFO L231 Difference]: Finished difference. Result has 197 places, 182 transitions, 536 flow [2025-03-09 01:18:07,818 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=536, PETRI_PLACES=197, PETRI_TRANSITIONS=182} [2025-03-09 01:18:07,819 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, 23 predicate places. [2025-03-09 01:18:07,819 INFO L471 AbstractCegarLoop]: Abstraction has has 197 places, 182 transitions, 536 flow [2025-03-09 01:18:07,819 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 92.0) internal successors, (920), 10 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:18:07,819 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:18:07,819 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:18:07,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-09 01:18:08,019 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:18:08,020 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-03-09 01:18:08,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:18:08,020 INFO L85 PathProgramCache]: Analyzing trace with hash -263223394, now seen corresponding path program 1 times [2025-03-09 01:18:08,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:18:08,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [69494079] [2025-03-09 01:18:08,021 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:18:08,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:18:08,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:18:08,023 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:18:08,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-09 01:18:08,094 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-09 01:18:08,211 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-09 01:18:08,211 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:18:08,211 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:18:08,228 INFO L256 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-09 01:18:08,229 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:18:08,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:18:08,245 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:18:08,245 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:18:08,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69494079] [2025-03-09 01:18:08,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69494079] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:18:08,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:18:08,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-09 01:18:08,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973457163] [2025-03-09 01:18:08,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:18:08,246 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-09 01:18:08,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:18:08,246 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-09 01:18:08,246 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-09 01:18:08,411 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 205 [2025-03-09 01:18:08,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 182 transitions, 536 flow. Second operand has 5 states, 5 states have (on average 103.0) internal successors, (515), 5 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:18:08,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:18:08,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 205 [2025-03-09 01:18:08,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:18:09,533 INFO L124 PetriNetUnfolderBase]: 6854/17172 cut-off events. [2025-03-09 01:18:09,533 INFO L125 PetriNetUnfolderBase]: For 342/386 co-relation queries the response was YES. [2025-03-09 01:18:09,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28042 conditions, 17172 events. 6854/17172 cut-off events. For 342/386 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 175612 event pairs, 5821 based on Foata normal form. 0/14419 useless extension candidates. Maximal degree in co-relation 27966. Up to 10102 conditions per place. [2025-03-09 01:18:09,644 INFO L140 encePairwiseOnDemand]: 199/205 looper letters, 76 selfloop transitions, 11 changer transitions 0/180 dead transitions. [2025-03-09 01:18:09,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 180 transitions, 706 flow [2025-03-09 01:18:09,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-09 01:18:09,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-09 01:18:09,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 582 transitions. [2025-03-09 01:18:09,646 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5678048780487804 [2025-03-09 01:18:09,646 INFO L175 Difference]: Start difference. First operand has 197 places, 182 transitions, 536 flow. Second operand 5 states and 582 transitions. [2025-03-09 01:18:09,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 180 transitions, 706 flow [2025-03-09 01:18:09,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 180 transitions, 684 flow, removed 0 selfloop flow, removed 10 redundant places. [2025-03-09 01:18:09,649 INFO L231 Difference]: Finished difference. Result has 189 places, 180 transitions, 532 flow [2025-03-09 01:18:09,649 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=532, PETRI_PLACES=189, PETRI_TRANSITIONS=180} [2025-03-09 01:18:09,649 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, 15 predicate places. [2025-03-09 01:18:09,649 INFO L471 AbstractCegarLoop]: Abstraction has has 189 places, 180 transitions, 532 flow [2025-03-09 01:18:09,649 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 103.0) internal successors, (515), 5 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:18:09,649 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:18:09,649 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:18:09,660 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-09 01:18:09,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:18:09,850 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-03-09 01:18:09,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:18:09,850 INFO L85 PathProgramCache]: Analyzing trace with hash -263223393, now seen corresponding path program 1 times [2025-03-09 01:18:09,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:18:09,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2056856690] [2025-03-09 01:18:09,851 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:18:09,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:18:09,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:18:09,852 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:18:09,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-09 01:18:09,923 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-09 01:18:10,047 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-09 01:18:10,047 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:18:10,047 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:18:10,069 INFO L256 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-09 01:18:10,070 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:18:10,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-09 01:18:10,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:18:10,108 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:18:10,108 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:18:10,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056856690] [2025-03-09 01:18:10,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056856690] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:18:10,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:18:10,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-09 01:18:10,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115719788] [2025-03-09 01:18:10,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:18:10,108 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 01:18:10,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:18:10,108 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 01:18:10,108 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-09 01:18:10,297 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 205 [2025-03-09 01:18:10,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 180 transitions, 532 flow. Second operand has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:18:10,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:18:10,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 205 [2025-03-09 01:18:10,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:18:11,271 INFO L124 PetriNetUnfolderBase]: 6854/17164 cut-off events. [2025-03-09 01:18:11,271 INFO L125 PetriNetUnfolderBase]: For 390/434 co-relation queries the response was YES. [2025-03-09 01:18:11,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28025 conditions, 17164 events. 6854/17164 cut-off events. For 390/434 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 175550 event pairs, 5821 based on Foata normal form. 8/14419 useless extension candidates. Maximal degree in co-relation 27957. Up to 10100 conditions per place. [2025-03-09 01:18:11,339 INFO L140 encePairwiseOnDemand]: 200/205 looper letters, 73 selfloop transitions, 9 changer transitions 0/178 dead transitions. [2025-03-09 01:18:11,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 178 transitions, 692 flow [2025-03-09 01:18:11,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 01:18:11,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 01:18:11,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 493 transitions. [2025-03-09 01:18:11,340 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6012195121951219 [2025-03-09 01:18:11,340 INFO L175 Difference]: Start difference. First operand has 189 places, 180 transitions, 532 flow. Second operand 4 states and 493 transitions. [2025-03-09 01:18:11,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 178 transitions, 692 flow [2025-03-09 01:18:11,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 178 transitions, 670 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-09 01:18:11,344 INFO L231 Difference]: Finished difference. Result has 186 places, 178 transitions, 524 flow [2025-03-09 01:18:11,344 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=524, PETRI_PLACES=186, PETRI_TRANSITIONS=178} [2025-03-09 01:18:11,345 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, 12 predicate places. [2025-03-09 01:18:11,345 INFO L471 AbstractCegarLoop]: Abstraction has has 186 places, 178 transitions, 524 flow [2025-03-09 01:18:11,345 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:18:11,345 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:18:11,345 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:18:11,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-09 01:18:11,546 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:18:11,546 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-03-09 01:18:11,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:18:11,546 INFO L85 PathProgramCache]: Analyzing trace with hash -2062698891, now seen corresponding path program 1 times [2025-03-09 01:18:11,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:18:11,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [256027757] [2025-03-09 01:18:11,547 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:18:11,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:18:11,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:18:11,549 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:18:11,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-09 01:18:11,628 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-09 01:18:11,743 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-09 01:18:11,743 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:18:11,743 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:18:11,760 INFO L256 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-09 01:18:11,761 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:18:11,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:18:11,773 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:18:11,791 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:18:11,792 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:18:11,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256027757] [2025-03-09 01:18:11,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256027757] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:18:11,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-09 01:18:11,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2025-03-09 01:18:11,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101362964] [2025-03-09 01:18:11,792 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-09 01:18:11,792 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-09 01:18:11,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:18:11,792 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-09 01:18:11,792 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-03-09 01:18:11,793 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 205 [2025-03-09 01:18:11,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 178 transitions, 524 flow. Second operand has 6 states, 6 states have (on average 110.83333333333333) internal successors, (665), 6 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:18:11,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:18:11,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 205 [2025-03-09 01:18:11,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:18:12,951 INFO L124 PetriNetUnfolderBase]: 6854/17214 cut-off events. [2025-03-09 01:18:12,951 INFO L125 PetriNetUnfolderBase]: For 454/498 co-relation queries the response was YES. [2025-03-09 01:18:12,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28155 conditions, 17214 events. 6854/17214 cut-off events. For 454/498 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 176027 event pairs, 5821 based on Foata normal form. 6/14463 useless extension candidates. Maximal degree in co-relation 28080. Up to 10096 conditions per place. [2025-03-09 01:18:13,043 INFO L140 encePairwiseOnDemand]: 201/205 looper letters, 90 selfloop transitions, 11 changer transitions 0/197 dead transitions. [2025-03-09 01:18:13,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 197 transitions, 848 flow [2025-03-09 01:18:13,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-09 01:18:13,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-09 01:18:13,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 738 transitions. [2025-03-09 01:18:13,045 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6 [2025-03-09 01:18:13,045 INFO L175 Difference]: Start difference. First operand has 186 places, 178 transitions, 524 flow. Second operand 6 states and 738 transitions. [2025-03-09 01:18:13,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 197 transitions, 848 flow [2025-03-09 01:18:13,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 197 transitions, 804 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-09 01:18:13,049 INFO L231 Difference]: Finished difference. Result has 192 places, 183 transitions, 592 flow [2025-03-09 01:18:13,050 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=592, PETRI_PLACES=192, PETRI_TRANSITIONS=183} [2025-03-09 01:18:13,050 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, 18 predicate places. [2025-03-09 01:18:13,050 INFO L471 AbstractCegarLoop]: Abstraction has has 192 places, 183 transitions, 592 flow [2025-03-09 01:18:13,051 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 110.83333333333333) internal successors, (665), 6 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:18:13,051 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:18:13,051 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:18:13,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-09 01:18:13,251 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:18:13,252 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-03-09 01:18:13,252 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:18:13,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1714601930, now seen corresponding path program 1 times [2025-03-09 01:18:13,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:18:13,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1169335593] [2025-03-09 01:18:13,252 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:18:13,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:18:13,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:18:13,254 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:18:13,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-09 01:18:13,338 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-09 01:18:13,492 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-09 01:18:13,494 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:18:13,494 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:18:13,514 INFO L256 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-09 01:18:13,516 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:18:13,600 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 [2025-03-09 01:18:13,656 INFO L349 Elim1Store]: treesize reduction 90, result has 30.2 percent of original size [2025-03-09 01:18:13,656 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 [2025-03-09 01:18:13,696 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 [2025-03-09 01:18:13,735 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 [2025-03-09 01:18:13,752 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 [2025-03-09 01:18:13,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-03-09 01:18:13,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:18:13,816 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:18:14,374 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-09 01:18:14,374 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 [2025-03-09 01:18:14,388 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-09 01:18:14,389 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 [2025-03-09 01:18:14,395 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 [2025-03-09 01:18:19,616 INFO L349 Elim1Store]: treesize reduction 7, result has 96.7 percent of original size [2025-03-09 01:18:19,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 103 treesize of output 290 [2025-03-09 01:18:19,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:18:19,901 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:18:19,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169335593] [2025-03-09 01:18:19,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169335593] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:18:19,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-09 01:18:19,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2025-03-09 01:18:19,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256824216] [2025-03-09 01:18:19,902 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-09 01:18:19,902 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-09 01:18:19,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:18:19,902 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-09 01:18:19,903 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=273, Unknown=18, NotChecked=0, Total=342 [2025-03-09 01:18:25,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-09 01:18:28,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-09 01:18:30,873 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 205 [2025-03-09 01:18:30,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 183 transitions, 592 flow. Second operand has 19 states, 19 states have (on average 55.68421052631579) internal successors, (1058), 19 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:18:30,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:18:30,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 205 [2025-03-09 01:18:30,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:18:36,313 INFO L124 PetriNetUnfolderBase]: 27664/54545 cut-off events. [2025-03-09 01:18:36,313 INFO L125 PetriNetUnfolderBase]: For 635/635 co-relation queries the response was YES. [2025-03-09 01:18:36,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96940 conditions, 54545 events. 27664/54545 cut-off events. For 635/635 co-relation queries the response was YES. Maximal size of possible extension queue 1690. Compared 557895 event pairs, 24779 based on Foata normal form. 6/41154 useless extension candidates. Maximal degree in co-relation 96870. Up to 40791 conditions per place. [2025-03-09 01:18:36,588 INFO L140 encePairwiseOnDemand]: 197/205 looper letters, 114 selfloop transitions, 26 changer transitions 0/194 dead transitions. [2025-03-09 01:18:36,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 194 transitions, 912 flow [2025-03-09 01:18:36,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-09 01:18:36,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-09 01:18:36,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 772 transitions. [2025-03-09 01:18:36,589 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.31382113821138213 [2025-03-09 01:18:36,590 INFO L175 Difference]: Start difference. First operand has 192 places, 183 transitions, 592 flow. Second operand 12 states and 772 transitions. [2025-03-09 01:18:36,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 194 transitions, 912 flow [2025-03-09 01:18:36,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 194 transitions, 896 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-03-09 01:18:36,594 INFO L231 Difference]: Finished difference. Result has 204 places, 188 transitions, 665 flow [2025-03-09 01:18:36,594 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=576, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=665, PETRI_PLACES=204, PETRI_TRANSITIONS=188} [2025-03-09 01:18:36,595 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, 30 predicate places. [2025-03-09 01:18:36,595 INFO L471 AbstractCegarLoop]: Abstraction has has 204 places, 188 transitions, 665 flow [2025-03-09 01:18:36,595 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.68421052631579) internal successors, (1058), 19 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:18:36,595 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:18:36,595 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:18:36,608 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-09 01:18:36,796 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:18:36,796 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-03-09 01:18:36,796 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:18:36,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1714601929, now seen corresponding path program 1 times [2025-03-09 01:18:36,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:18:36,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [366999039] [2025-03-09 01:18:36,797 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:18:36,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:18:36,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:18:36,798 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:18:36,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-09 01:18:36,899 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-09 01:18:37,061 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-09 01:18:37,061 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:18:37,061 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:18:37,082 INFO L256 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 43 conjuncts are in the unsatisfiable core [2025-03-09 01:18:37,084 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:18:37,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-09 01:18:37,227 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 [2025-03-09 01:18:37,230 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 [2025-03-09 01:18:37,272 INFO L349 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2025-03-09 01:18:37,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2025-03-09 01:18:37,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2025-03-09 01:18:37,312 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 [2025-03-09 01:18:37,317 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 34 treesize of output 27 [2025-03-09 01:18:37,345 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 [2025-03-09 01:18:37,353 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 34 treesize of output 27 [2025-03-09 01:18:37,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 19 [2025-03-09 01:18:37,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-09 01:18:37,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2025-03-09 01:18:37,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:18:37,446 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:18:37,577 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|)))) (and (forall ((v_ArrVal_680 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_679 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$#3.offset| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_679) |c_~#c~0.base|) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#3.base| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_680) |c_~#c~0.base|) .cse0)))) (forall ((v_ArrVal_679 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$#3.offset| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_679) |c_~#c~0.base|) .cse0))) (bvule (bvadd (_ bv4 32) .cse1) (bvadd (_ bv8 32) .cse1)))))) is different from false [2025-03-09 01:18:37,617 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|)))) (and (forall ((v_ArrVal_680 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_679 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$#3.offset| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_679) |c_~#c~0.base|) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#3.base| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_680) |c_~#c~0.base|) .cse0)))) (forall ((v_ArrVal_679 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$#3.offset| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_679) |c_~#c~0.base|) .cse0))) (bvule (bvadd (_ bv4 32) .cse1) (bvadd (_ bv8 32) .cse1)))))) is different from false [2025-03-09 01:18:37,777 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-09 01:18:37,777 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 [2025-03-09 01:18:37,787 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-09 01:18:37,788 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 [2025-03-09 01:18:37,794 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 [2025-03-09 01:18:37,836 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-09 01:18:37,836 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 [2025-03-09 01:18:37,842 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-09 01:18:37,842 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 [2025-03-09 01:18:37,844 INFO L173 IndexEqualityManager]: detected equality via solver [2025-03-09 01:18:37,856 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-09 01:18:37,856 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 [2025-03-09 01:18:37,859 INFO L173 IndexEqualityManager]: detected equality via solver [2025-03-09 01:18:37,870 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-09 01:18:37,871 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 [2025-03-09 01:18:39,262 INFO L349 Elim1Store]: treesize reduction 10, result has 83.6 percent of original size [2025-03-09 01:18:39,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 91 [2025-03-09 01:18:39,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2025-03-09 01:18:39,707 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:18:39,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366999039] [2025-03-09 01:18:39,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366999039] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:18:39,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-09 01:18:39,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2025-03-09 01:18:39,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692336948] [2025-03-09 01:18:39,707 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-09 01:18:39,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-09 01:18:39,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:18:39,707 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-09 01:18:39,708 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=362, Unknown=4, NotChecked=78, Total=506 [2025-03-09 01:18:40,715 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 205 [2025-03-09 01:18:40,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 188 transitions, 665 flow. Second operand has 23 states, 23 states have (on average 39.47826086956522) internal successors, (908), 23 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:18:40,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:18:40,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 205 [2025-03-09 01:18:40,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:18:51,404 INFO L124 PetriNetUnfolderBase]: 47722/84356 cut-off events. [2025-03-09 01:18:51,404 INFO L125 PetriNetUnfolderBase]: For 792/792 co-relation queries the response was YES. [2025-03-09 01:18:51,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156957 conditions, 84356 events. 47722/84356 cut-off events. For 792/792 co-relation queries the response was YES. Maximal size of possible extension queue 2702. Compared 823771 event pairs, 43378 based on Foata normal form. 6/53193 useless extension candidates. Maximal degree in co-relation 156878. Up to 70473 conditions per place. [2025-03-09 01:18:52,127 INFO L140 encePairwiseOnDemand]: 195/205 looper letters, 127 selfloop transitions, 28 changer transitions 0/193 dead transitions. [2025-03-09 01:18:52,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 193 transitions, 989 flow [2025-03-09 01:18:52,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-09 01:18:52,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-03-09 01:18:52,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 671 transitions. [2025-03-09 01:18:52,130 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2337979094076655 [2025-03-09 01:18:52,131 INFO L175 Difference]: Start difference. First operand has 204 places, 188 transitions, 665 flow. Second operand 14 states and 671 transitions. [2025-03-09 01:18:52,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 193 transitions, 989 flow [2025-03-09 01:18:52,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 193 transitions, 952 flow, removed 10 selfloop flow, removed 4 redundant places. [2025-03-09 01:18:52,140 INFO L231 Difference]: Finished difference. Result has 215 places, 190 transitions, 698 flow [2025-03-09 01:18:52,141 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=628, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=698, PETRI_PLACES=215, PETRI_TRANSITIONS=190} [2025-03-09 01:18:52,141 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, 41 predicate places. [2025-03-09 01:18:52,141 INFO L471 AbstractCegarLoop]: Abstraction has has 215 places, 190 transitions, 698 flow [2025-03-09 01:18:52,142 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 39.47826086956522) internal successors, (908), 23 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:18:52,142 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:18:52,142 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1] [2025-03-09 01:18:52,157 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-09 01:18:52,342 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:18:52,343 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-03-09 01:18:52,343 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:18:52,343 INFO L85 PathProgramCache]: Analyzing trace with hash 836301357, now seen corresponding path program 2 times [2025-03-09 01:18:52,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:18:52,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2050372557] [2025-03-09 01:18:52,344 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:18:52,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:18:52,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:18:52,346 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:18:52,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-09 01:18:52,496 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-03-09 01:18:52,732 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-03-09 01:18:52,732 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 01:18:52,732 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:18:52,758 INFO L256 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-09 01:18:52,759 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:18:52,814 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:18:52,814 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:18:52,897 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:18:52,897 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:18:52,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050372557] [2025-03-09 01:18:52,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050372557] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:18:52,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-09 01:18:52,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2025-03-09 01:18:52,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64123485] [2025-03-09 01:18:52,897 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-09 01:18:52,898 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-09 01:18:52,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:18:52,898 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-09 01:18:52,898 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2025-03-09 01:18:52,899 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 205 [2025-03-09 01:18:52,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 190 transitions, 698 flow. Second operand has 12 states, 12 states have (on average 111.91666666666667) internal successors, (1343), 12 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:18:52,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:18:52,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 205 [2025-03-09 01:18:52,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:18:55,450 INFO L124 PetriNetUnfolderBase]: 6854/17322 cut-off events. [2025-03-09 01:18:55,450 INFO L125 PetriNetUnfolderBase]: For 835/879 co-relation queries the response was YES. [2025-03-09 01:18:55,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28683 conditions, 17322 events. 6854/17322 cut-off events. For 835/879 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 176207 event pairs, 5821 based on Foata normal form. 12/14584 useless extension candidates. Maximal degree in co-relation 28605. Up to 10096 conditions per place. [2025-03-09 01:18:55,512 INFO L140 encePairwiseOnDemand]: 201/205 looper letters, 120 selfloop transitions, 23 changer transitions 0/242 dead transitions. [2025-03-09 01:18:55,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 242 transitions, 1468 flow [2025-03-09 01:18:55,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-09 01:18:55,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-09 01:18:55,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1419 transitions. [2025-03-09 01:18:55,514 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5768292682926829 [2025-03-09 01:18:55,514 INFO L175 Difference]: Start difference. First operand has 215 places, 190 transitions, 698 flow. Second operand 12 states and 1419 transitions. [2025-03-09 01:18:55,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 242 transitions, 1468 flow [2025-03-09 01:18:55,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 242 transitions, 1312 flow, removed 0 selfloop flow, removed 11 redundant places. [2025-03-09 01:18:55,519 INFO L231 Difference]: Finished difference. Result has 222 places, 203 transitions, 899 flow [2025-03-09 01:18:55,520 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=646, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=899, PETRI_PLACES=222, PETRI_TRANSITIONS=203} [2025-03-09 01:18:55,520 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, 48 predicate places. [2025-03-09 01:18:55,520 INFO L471 AbstractCegarLoop]: Abstraction has has 222 places, 203 transitions, 899 flow [2025-03-09 01:18:55,520 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 111.91666666666667) internal successors, (1343), 12 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:18:55,520 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:18:55,520 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1] [2025-03-09 01:18:55,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-09 01:18:55,721 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:18:55,721 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-03-09 01:18:55,721 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:18:55,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1947441875, now seen corresponding path program 3 times [2025-03-09 01:18:55,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:18:55,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [351211410] [2025-03-09 01:18:55,722 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 01:18:55,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:18:55,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:18:55,724 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:18:55,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-09 01:18:55,922 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 97 statements into 12 equivalence classes.