./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 c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/goblint-regression/28-race_reach_90-arrayloop2_racing.i -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f41f3c018db74ffccd5759d166eb9816a1bf73b1747e3e539ecb5bf51feb56af --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 12:58:58,343 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 12:58:58,382 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-06 12:58:58,386 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 12:58:58,386 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 12:58:58,401 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 12:58:58,402 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 12:58:58,402 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 12:58:58,403 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 12:58:58,403 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 12:58:58,403 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 12:58:58,403 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 12:58:58,403 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 12:58:58,403 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 12:58:58,403 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 12:58:58,404 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 12:58:58,404 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 12:58:58,404 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 12:58:58,404 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 12:58:58,404 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 12:58:58,404 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-06 12:58:58,404 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-06 12:58:58,404 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-06 12:58:58,404 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 12:58:58,405 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-06 12:58:58,405 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-06 12:58:58,405 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 12:58:58,405 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 12:58:58,405 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 12:58:58,405 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 12:58:58,405 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 12:58:58,405 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 12:58:58,405 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 12:58:58,405 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 12:58:58,406 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 12:58:58,406 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 12:58:58,406 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 12:58:58,406 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 12:58:58,406 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 12:58:58,406 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 12:58:58,406 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 12:58:58,406 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 12:58:58,406 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f41f3c018db74ffccd5759d166eb9816a1bf73b1747e3e539ecb5bf51feb56af [2025-02-06 12:58:58,630 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 12:58:58,638 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 12:58:58,641 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 12:58:58,642 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 12:58:58,642 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 12:58:58,643 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_90-arrayloop2_racing.i [2025-02-06 12:58:59,858 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/01dff8567/3ff05b81651c494fa7da8c5a57b5725a/FLAGdeb3eb1ba [2025-02-06 12:59:00,181 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 12:59:00,198 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_90-arrayloop2_racing.i [2025-02-06 12:59:00,221 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/01dff8567/3ff05b81651c494fa7da8c5a57b5725a/FLAGdeb3eb1ba [2025-02-06 12:59:00,425 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/01dff8567/3ff05b81651c494fa7da8c5a57b5725a [2025-02-06 12:59:00,427 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 12:59:00,432 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 12:59:00,433 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 12:59:00,433 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 12:59:00,441 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 12:59:00,442 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 12:59:00" (1/1) ... [2025-02-06 12:59:00,444 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5641abbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:00, skipping insertion in model container [2025-02-06 12:59:00,445 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 12:59:00" (1/1) ... [2025-02-06 12:59:00,480 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 12:59:00,780 WARN L1731 CHandler]: Possible shadowing of function new [2025-02-06 12:59:00,781 WARN L1731 CHandler]: Possible shadowing of function new [2025-02-06 12:59:00,781 WARN L1731 CHandler]: Possible shadowing of function new [2025-02-06 12:59:00,781 WARN L1731 CHandler]: Possible shadowing of function new [2025-02-06 12:59:00,815 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 12:59:00,852 ERROR L321 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2025-02-06 12:59:00,853 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6fe63d78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:00, skipping insertion in model container [2025-02-06 12:59:00,854 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 12:59:00,854 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2025-02-06 12:59:00,856 INFO L158 Benchmark]: Toolchain (without parser) took 426.93ms. Allocated memory is still 142.6MB. Free memory was 107.4MB in the beginning and 90.1MB in the end (delta: 17.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-02-06 12:59:00,857 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 226.5MB. Free memory is still 146.6MB. There was no memory consumed. Max. memory is 16.1GB. [2025-02-06 12:59:00,857 INFO L158 Benchmark]: CACSL2BoogieTranslator took 420.72ms. Allocated memory is still 142.6MB. Free memory was 107.4MB in the beginning and 90.1MB in the end (delta: 17.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-02-06 12:59:00,858 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 226.5MB. Free memory is still 146.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 420.72ms. Allocated memory is still 142.6MB. Free memory was 107.4MB in the beginning and 90.1MB in the end (delta: 17.3MB). Peak memory consumption was 16.8MB. 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-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/goblint-regression/28-race_reach_90-arrayloop2_racing.i -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f41f3c018db74ffccd5759d166eb9816a1bf73b1747e3e539ecb5bf51feb56af --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 12:59:02,981 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 12:59:03,062 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2025-02-06 12:59:03,070 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 12:59:03,070 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 12:59:03,104 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 12:59:03,105 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 12:59:03,106 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 12:59:03,106 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 12:59:03,110 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 12:59:03,111 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 12:59:03,111 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 12:59:03,111 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 12:59:03,111 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 12:59:03,111 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 12:59:03,111 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 12:59:03,111 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 12:59:03,111 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 12:59:03,111 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 12:59:03,111 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 12:59:03,111 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-06 12:59:03,111 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-06 12:59:03,112 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-06 12:59:03,112 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 12:59:03,112 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-06 12:59:03,112 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2025-02-06 12:59:03,112 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2025-02-06 12:59:03,112 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-06 12:59:03,112 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 12:59:03,112 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 12:59:03,112 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 12:59:03,112 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 12:59:03,117 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 12:59:03,118 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 12:59:03,118 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 12:59:03,118 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 12:59:03,118 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 12:59:03,118 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 12:59:03,118 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2025-02-06 12:59:03,118 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2025-02-06 12:59:03,118 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 12:59:03,118 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 12:59:03,119 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 12:59:03,119 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 12:59:03,119 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f41f3c018db74ffccd5759d166eb9816a1bf73b1747e3e539ecb5bf51feb56af [2025-02-06 12:59:03,388 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 12:59:03,399 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 12:59:03,402 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 12:59:03,404 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 12:59:03,404 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 12:59:03,405 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_90-arrayloop2_racing.i [2025-02-06 12:59:04,658 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/f693a075d/272bbdd2f0ab485ebd29ccfcc0642746/FLAG62579b242 [2025-02-06 12:59:04,991 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 12:59:04,992 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_90-arrayloop2_racing.i [2025-02-06 12:59:05,008 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/f693a075d/272bbdd2f0ab485ebd29ccfcc0642746/FLAG62579b242 [2025-02-06 12:59:05,025 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/f693a075d/272bbdd2f0ab485ebd29ccfcc0642746 [2025-02-06 12:59:05,027 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 12:59:05,029 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 12:59:05,030 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 12:59:05,030 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 12:59:05,033 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 12:59:05,034 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 12:59:05" (1/1) ... [2025-02-06 12:59:05,035 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2497f49c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:05, skipping insertion in model container [2025-02-06 12:59:05,035 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 12:59:05" (1/1) ... [2025-02-06 12:59:05,074 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 12:59:05,462 WARN L1731 CHandler]: Possible shadowing of function new [2025-02-06 12:59:05,463 WARN L1731 CHandler]: Possible shadowing of function new [2025-02-06 12:59:05,463 WARN L1731 CHandler]: Possible shadowing of function new [2025-02-06 12:59:05,463 WARN L1731 CHandler]: Possible shadowing of function new [2025-02-06 12:59:05,502 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 12:59:05,549 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2025-02-06 12:59:05,562 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 12:59:05,602 WARN L1731 CHandler]: Possible shadowing of function new [2025-02-06 12:59:05,602 WARN L1731 CHandler]: Possible shadowing of function new [2025-02-06 12:59:05,603 WARN L1731 CHandler]: Possible shadowing of function new [2025-02-06 12:59:05,603 WARN L1731 CHandler]: Possible shadowing of function new [2025-02-06 12:59:05,630 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 12:59:05,653 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 12:59:05,693 WARN L1731 CHandler]: Possible shadowing of function new [2025-02-06 12:59:05,694 WARN L1731 CHandler]: Possible shadowing of function new [2025-02-06 12:59:05,694 WARN L1731 CHandler]: Possible shadowing of function new [2025-02-06 12:59:05,694 WARN L1731 CHandler]: Possible shadowing of function new [2025-02-06 12:59:05,713 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 12:59:05,772 INFO L204 MainTranslator]: Completed translation [2025-02-06 12:59:05,772 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:05 WrapperNode [2025-02-06 12:59:05,774 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 12:59:05,775 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 12:59:05,775 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 12:59:05,775 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 12:59:05,781 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:05" (1/1) ... [2025-02-06 12:59:05,806 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:05" (1/1) ... [2025-02-06 12:59:05,874 INFO L138 Inliner]: procedures = 284, calls = 143, calls flagged for inlining = 11, calls inlined = 12, statements flattened = 355 [2025-02-06 12:59:05,878 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 12:59:05,879 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 12:59:05,880 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 12:59:05,880 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 12:59:05,886 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:05" (1/1) ... [2025-02-06 12:59:05,886 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:05" (1/1) ... [2025-02-06 12:59:05,891 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:05" (1/1) ... [2025-02-06 12:59:05,921 INFO L175 MemorySlicer]: Split 105 memory accesses to 5 slices as follows [2, 5, 94, 2, 2]. 90 percent of accesses are in the largest equivalence class. The 77 initializations are split as follows [2, 5, 70, 0, 0]. The 15 writes are split as follows [0, 0, 13, 1, 1]. [2025-02-06 12:59:05,924 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:05" (1/1) ... [2025-02-06 12:59:05,924 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:05" (1/1) ... [2025-02-06 12:59:05,948 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:05" (1/1) ... [2025-02-06 12:59:05,951 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:05" (1/1) ... [2025-02-06 12:59:05,954 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:05" (1/1) ... [2025-02-06 12:59:05,955 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:05" (1/1) ... [2025-02-06 12:59:05,959 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 12:59:05,959 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 12:59:05,959 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 12:59:05,959 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 12:59:05,960 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:05" (1/1) ... [2025-02-06 12:59:05,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 12:59:05,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:05,993 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-06 12:59:05,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-06 12:59:06,015 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2025-02-06 12:59:06,015 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2025-02-06 12:59:06,015 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2025-02-06 12:59:06,015 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2025-02-06 12:59:06,016 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#4 [2025-02-06 12:59:06,016 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-02-06 12:59:06,016 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-02-06 12:59:06,016 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2025-02-06 12:59:06,016 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2025-02-06 12:59:06,016 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2025-02-06 12:59:06,016 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2025-02-06 12:59:06,016 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2025-02-06 12:59:06,017 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2025-02-06 12:59:06,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-02-06 12:59:06,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2025-02-06 12:59:06,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2025-02-06 12:59:06,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2025-02-06 12:59:06,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2025-02-06 12:59:06,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#4 [2025-02-06 12:59:06,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2025-02-06 12:59:06,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2025-02-06 12:59:06,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2025-02-06 12:59:06,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2025-02-06 12:59:06,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2025-02-06 12:59:06,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2025-02-06 12:59:06,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2025-02-06 12:59:06,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2025-02-06 12:59:06,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2025-02-06 12:59:06,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#4 [2025-02-06 12:59:06,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#0 [2025-02-06 12:59:06,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#1 [2025-02-06 12:59:06,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#2 [2025-02-06 12:59:06,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#3 [2025-02-06 12:59:06,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#4 [2025-02-06 12:59:06,017 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-02-06 12:59:06,017 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2025-02-06 12:59:06,017 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2025-02-06 12:59:06,019 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-02-06 12:59:06,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-06 12:59:06,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 12:59:06,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-02-06 12:59:06,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2025-02-06 12:59:06,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2025-02-06 12:59:06,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2025-02-06 12:59:06,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2025-02-06 12:59:06,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 12:59:06,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 12:59:06,020 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-06 12:59:06,189 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 12:59:06,191 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 12:59:07,070 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L1082: havoc main_~#t2_ids~0#1.base, main_~#t2_ids~0#1.offset; [2025-02-06 12:59:07,071 INFO L1309 $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 [2025-02-06 12:59:07,071 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L1082-2: havoc main_~#t1_ids~0#1.base, main_~#t1_ids~0#1.offset; [2025-02-06 12:59:07,071 INFO L1309 $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 [2025-02-06 12:59:07,072 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 12:59:07,072 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 12:59:08,580 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 12:59:08,581 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 12:59:08,581 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 12:59:08 BoogieIcfgContainer [2025-02-06 12:59:08,581 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 12:59:08,583 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 12:59:08,583 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 12:59:08,615 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 12:59:08,619 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 12:59:05" (1/3) ... [2025-02-06 12:59:08,620 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51f570f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 12:59:08, skipping insertion in model container [2025-02-06 12:59:08,621 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:59:05" (2/3) ... [2025-02-06 12:59:08,623 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51f570f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 12:59:08, skipping insertion in model container [2025-02-06 12:59:08,623 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 12:59:08" (3/3) ... [2025-02-06 12:59:08,624 INFO L128 eAbstractionObserver]: Analyzing ICFG 28-race_reach_90-arrayloop2_racing.i [2025-02-06 12:59:08,638 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 12:59:08,640 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 28-race_reach_90-arrayloop2_racing.i that has 3 procedures, 176 locations, 1 initial locations, 20 loop locations, and 59 error locations. [2025-02-06 12:59:08,640 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 12:59:08,739 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-02-06 12:59:08,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 182 places, 213 transitions, 446 flow [2025-02-06 12:59:08,872 INFO L124 PetriNetUnfolderBase]: 55/352 cut-off events. [2025-02-06 12:59:08,876 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-02-06 12:59:08,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 369 conditions, 352 events. 55/352 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1987 event pairs, 0 based on Foata normal form. 0/194 useless extension candidates. Maximal degree in co-relation 195. Up to 8 conditions per place. [2025-02-06 12:59:08,887 INFO L82 GeneralOperation]: Start removeDead. Operand has 182 places, 213 transitions, 446 flow [2025-02-06 12:59:08,897 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 182 places, 213 transitions, 446 flow [2025-02-06 12:59:08,906 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 12:59:08,917 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;@38e3c248, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 12:59:08,918 INFO L334 AbstractCegarLoop]: Starting to check reachability of 91 error locations. [2025-02-06 12:59:08,926 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 12:59:08,927 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2025-02-06 12:59:08,927 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 12:59:08,927 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:08,928 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 12:59:08,928 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)] === [2025-02-06 12:59:08,932 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:08,933 INFO L85 PathProgramCache]: Analyzing trace with hash 964412, now seen corresponding path program 1 times [2025-02-06 12:59:08,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:59:08,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [597348477] [2025-02-06 12:59:08,944 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:08,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:08,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:08,950 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:59:08,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-06 12:59:09,048 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 12:59:09,169 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 12:59:09,170 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:09,170 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:09,190 INFO L256 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-06 12:59:09,193 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:09,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:59:09,254 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 12:59:09,255 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:59:09,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597348477] [2025-02-06 12:59:09,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597348477] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:59:09,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:59:09,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 12:59:09,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202045546] [2025-02-06 12:59:09,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:59:09,261 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 12:59:09,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:59:09,280 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 12:59:09,281 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 12:59:09,492 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 213 [2025-02-06 12:59:09,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 213 transitions, 446 flow. Second operand has 4 states, 4 states have (on average 110.75) internal successors, (443), 4 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:59:09,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:09,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 213 [2025-02-06 12:59:09,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:11,482 INFO L124 PetriNetUnfolderBase]: 6917/15912 cut-off events. [2025-02-06 12:59:11,482 INFO L125 PetriNetUnfolderBase]: For 229/231 co-relation queries the response was YES. [2025-02-06 12:59:11,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26402 conditions, 15912 events. 6917/15912 cut-off events. For 229/231 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 152444 event pairs, 4107 based on Foata normal form. 3662/17368 useless extension candidates. Maximal degree in co-relation 25150. Up to 7204 conditions per place. [2025-02-06 12:59:11,598 INFO L140 encePairwiseOnDemand]: 181/213 looper letters, 115 selfloop transitions, 4 changer transitions 0/229 dead transitions. [2025-02-06 12:59:11,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 229 transitions, 716 flow [2025-02-06 12:59:11,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 12:59:11,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 12:59:11,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 611 transitions. [2025-02-06 12:59:11,609 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7171361502347418 [2025-02-06 12:59:11,610 INFO L175 Difference]: Start difference. First operand has 182 places, 213 transitions, 446 flow. Second operand 4 states and 611 transitions. [2025-02-06 12:59:11,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 229 transitions, 716 flow [2025-02-06 12:59:11,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 229 transitions, 716 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-02-06 12:59:11,622 INFO L231 Difference]: Finished difference. Result has 182 places, 185 transitions, 406 flow [2025-02-06 12:59:11,624 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=406, PETRI_PLACES=182, PETRI_TRANSITIONS=185} [2025-02-06 12:59:11,628 INFO L279 CegarLoopForPetriNet]: 182 programPoint places, 0 predicate places. [2025-02-06 12:59:11,629 INFO L471 AbstractCegarLoop]: Abstraction has has 182 places, 185 transitions, 406 flow [2025-02-06 12:59:11,629 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 110.75) internal successors, (443), 4 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:59:11,629 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:11,629 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 12:59:11,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-02-06 12:59:11,834 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:11,835 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)] === [2025-02-06 12:59:11,836 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:11,837 INFO L85 PathProgramCache]: Analyzing trace with hash 964413, now seen corresponding path program 1 times [2025-02-06 12:59:11,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:59:11,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1735327900] [2025-02-06 12:59:11,838 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:11,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:11,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:11,841 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:59:11,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-06 12:59:11,927 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 12:59:12,052 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 12:59:12,052 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:12,053 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:12,067 INFO L256 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-06 12:59:12,068 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:12,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:59:12,102 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 12:59:12,103 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:59:12,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735327900] [2025-02-06 12:59:12,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735327900] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:59:12,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:59:12,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 12:59:12,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722940188] [2025-02-06 12:59:12,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:59:12,104 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 12:59:12,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:59:12,104 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 12:59:12,105 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 12:59:12,420 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 213 [2025-02-06 12:59:12,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 185 transitions, 406 flow. Second operand has 4 states, 4 states have (on average 112.75) internal successors, (451), 4 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:59:12,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:12,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 213 [2025-02-06 12:59:12,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:13,783 INFO L124 PetriNetUnfolderBase]: 6855/17097 cut-off events. [2025-02-06 12:59:13,783 INFO L125 PetriNetUnfolderBase]: For 703/705 co-relation queries the response was YES. [2025-02-06 12:59:13,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28379 conditions, 17097 events. 6855/17097 cut-off events. For 703/705 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 171246 event pairs, 5822 based on Foata normal form. 3/14733 useless extension candidates. Maximal degree in co-relation 27013. Up to 10131 conditions per place. [2025-02-06 12:59:13,871 INFO L140 encePairwiseOnDemand]: 205/213 looper letters, 74 selfloop transitions, 5 changer transitions 0/189 dead transitions. [2025-02-06 12:59:13,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 189 transitions, 578 flow [2025-02-06 12:59:13,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 12:59:13,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 12:59:13,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 530 transitions. [2025-02-06 12:59:13,875 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6220657276995305 [2025-02-06 12:59:13,875 INFO L175 Difference]: Start difference. First operand has 182 places, 185 transitions, 406 flow. Second operand 4 states and 530 transitions. [2025-02-06 12:59:13,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 189 transitions, 578 flow [2025-02-06 12:59:13,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 189 transitions, 566 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 12:59:13,884 INFO L231 Difference]: Finished difference. Result has 184 places, 189 transitions, 439 flow [2025-02-06 12:59:13,885 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=439, PETRI_PLACES=184, PETRI_TRANSITIONS=189} [2025-02-06 12:59:13,886 INFO L279 CegarLoopForPetriNet]: 182 programPoint places, 2 predicate places. [2025-02-06 12:59:13,886 INFO L471 AbstractCegarLoop]: Abstraction has has 184 places, 189 transitions, 439 flow [2025-02-06 12:59:13,886 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 112.75) internal successors, (451), 4 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:59:13,887 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:13,887 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-02-06 12:59:13,901 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-06 12:59:14,091 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:14,091 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-02-06 12:59:14,092 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:14,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1333043261, now seen corresponding path program 1 times [2025-02-06 12:59:14,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:59:14,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [682364394] [2025-02-06 12:59:14,094 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:14,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:14,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:14,096 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:59:14,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-06 12:59:14,169 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 12:59:14,280 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 12:59:14,281 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:14,281 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:14,301 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-02-06 12:59:14,302 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:14,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2025-02-06 12:59:14,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:59:14,322 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 12:59:14,322 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:59:14,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682364394] [2025-02-06 12:59:14,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682364394] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:59:14,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:59:14,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 12:59:14,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144347987] [2025-02-06 12:59:14,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:59:14,323 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 12:59:14,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:59:14,323 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 12:59:14,323 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 12:59:14,411 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 213 [2025-02-06 12:59:14,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 189 transitions, 439 flow. Second operand has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:59:14,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:14,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 213 [2025-02-06 12:59:14,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:15,707 INFO L124 PetriNetUnfolderBase]: 6855/17096 cut-off events. [2025-02-06 12:59:15,707 INFO L125 PetriNetUnfolderBase]: For 238/240 co-relation queries the response was YES. [2025-02-06 12:59:15,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27903 conditions, 17096 events. 6855/17096 cut-off events. For 238/240 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 171184 event pairs, 5822 based on Foata normal form. 0/14728 useless extension candidates. Maximal degree in co-relation 27869. Up to 10127 conditions per place. [2025-02-06 12:59:15,799 INFO L140 encePairwiseOnDemand]: 210/213 looper letters, 72 selfloop transitions, 3 changer transitions 0/188 dead transitions. [2025-02-06 12:59:15,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 188 transitions, 587 flow [2025-02-06 12:59:15,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 12:59:15,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 12:59:15,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 417 transitions. [2025-02-06 12:59:15,801 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6525821596244131 [2025-02-06 12:59:15,801 INFO L175 Difference]: Start difference. First operand has 184 places, 189 transitions, 439 flow. Second operand 3 states and 417 transitions. [2025-02-06 12:59:15,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 188 transitions, 587 flow [2025-02-06 12:59:15,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 188 transitions, 584 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 12:59:15,809 INFO L231 Difference]: Finished difference. Result has 184 places, 188 transitions, 440 flow [2025-02-06 12:59:15,809 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=440, PETRI_PLACES=184, PETRI_TRANSITIONS=188} [2025-02-06 12:59:15,809 INFO L279 CegarLoopForPetriNet]: 182 programPoint places, 2 predicate places. [2025-02-06 12:59:15,811 INFO L471 AbstractCegarLoop]: Abstraction has has 184 places, 188 transitions, 440 flow [2025-02-06 12:59:15,811 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:59:15,811 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:15,811 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-02-06 12:59:15,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-06 12:59:16,012 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:16,012 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-02-06 12:59:16,013 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:16,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1333043260, now seen corresponding path program 1 times [2025-02-06 12:59:16,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:59:16,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1425781978] [2025-02-06 12:59:16,014 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:16,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:16,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:16,022 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:59:16,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-06 12:59:16,095 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 12:59:16,221 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 12:59:16,221 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:16,221 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:16,240 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-06 12:59:16,241 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:16,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-02-06 12:59:16,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:59:16,254 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 12:59:16,254 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:59:16,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425781978] [2025-02-06 12:59:16,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425781978] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:59:16,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:59:16,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 12:59:16,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063412749] [2025-02-06 12:59:16,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:59:16,255 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 12:59:16,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:59:16,255 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 12:59:16,255 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 12:59:16,386 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 213 [2025-02-06 12:59:16,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 188 transitions, 440 flow. Second operand has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:59:16,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:16,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 213 [2025-02-06 12:59:16,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:17,577 INFO L124 PetriNetUnfolderBase]: 6855/17095 cut-off events. [2025-02-06 12:59:17,577 INFO L125 PetriNetUnfolderBase]: For 240/242 co-relation queries the response was YES. [2025-02-06 12:59:17,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27903 conditions, 17095 events. 6855/17095 cut-off events. For 240/242 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 171151 event pairs, 5822 based on Foata normal form. 0/14729 useless extension candidates. Maximal degree in co-relation 27868. Up to 10127 conditions per place. [2025-02-06 12:59:17,663 INFO L140 encePairwiseOnDemand]: 210/213 looper letters, 72 selfloop transitions, 3 changer transitions 0/187 dead transitions. [2025-02-06 12:59:17,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 187 transitions, 588 flow [2025-02-06 12:59:17,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 12:59:17,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 12:59:17,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 417 transitions. [2025-02-06 12:59:17,668 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6525821596244131 [2025-02-06 12:59:17,668 INFO L175 Difference]: Start difference. First operand has 184 places, 188 transitions, 440 flow. Second operand 3 states and 417 transitions. [2025-02-06 12:59:17,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 187 transitions, 588 flow [2025-02-06 12:59:17,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 187 transitions, 582 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 12:59:17,673 INFO L231 Difference]: Finished difference. Result has 183 places, 187 transitions, 438 flow [2025-02-06 12:59:17,673 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=438, PETRI_PLACES=183, PETRI_TRANSITIONS=187} [2025-02-06 12:59:17,674 INFO L279 CegarLoopForPetriNet]: 182 programPoint places, 1 predicate places. [2025-02-06 12:59:17,675 INFO L471 AbstractCegarLoop]: Abstraction has has 183 places, 187 transitions, 438 flow [2025-02-06 12:59:17,675 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:59:17,675 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:17,675 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2025-02-06 12:59:17,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-06 12:59:17,875 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:17,876 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-02-06 12:59:17,877 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:17,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1625331066, now seen corresponding path program 1 times [2025-02-06 12:59:17,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:59:17,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1364425079] [2025-02-06 12:59:17,877 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:17,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:17,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:17,879 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:59:17,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-06 12:59:17,978 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-06 12:59:18,090 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-06 12:59:18,090 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:18,090 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:18,106 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-02-06 12:59:18,107 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:18,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:59:18,114 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 12:59:18,115 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:59:18,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364425079] [2025-02-06 12:59:18,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364425079] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:59:18,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:59:18,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 12:59:18,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474669234] [2025-02-06 12:59:18,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:59:18,116 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 12:59:18,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:59:18,117 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 12:59:18,117 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 12:59:18,117 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 213 [2025-02-06 12:59:18,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 187 transitions, 438 flow. Second operand has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:59:18,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:18,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 213 [2025-02-06 12:59:18,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:19,236 INFO L124 PetriNetUnfolderBase]: 6854/17117 cut-off events. [2025-02-06 12:59:19,236 INFO L125 PetriNetUnfolderBase]: For 242/244 co-relation queries the response was YES. [2025-02-06 12:59:19,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27931 conditions, 17117 events. 6854/17117 cut-off events. For 242/244 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 171286 event pairs, 5822 based on Foata normal form. 2/14742 useless extension candidates. Maximal degree in co-relation 27899. Up to 10127 conditions per place. [2025-02-06 12:59:19,327 INFO L140 encePairwiseOnDemand]: 210/213 looper letters, 76 selfloop transitions, 3 changer transitions 0/191 dead transitions. [2025-02-06 12:59:19,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 191 transitions, 608 flow [2025-02-06 12:59:19,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 12:59:19,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 12:59:19,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 425 transitions. [2025-02-06 12:59:19,329 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6651017214397497 [2025-02-06 12:59:19,330 INFO L175 Difference]: Start difference. First operand has 183 places, 187 transitions, 438 flow. Second operand 3 states and 425 transitions. [2025-02-06 12:59:19,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 191 transitions, 608 flow [2025-02-06 12:59:19,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 191 transitions, 598 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 12:59:19,334 INFO L231 Difference]: Finished difference. Result has 184 places, 187 transitions, 443 flow [2025-02-06 12:59:19,334 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=443, PETRI_PLACES=184, PETRI_TRANSITIONS=187} [2025-02-06 12:59:19,337 INFO L279 CegarLoopForPetriNet]: 182 programPoint places, 2 predicate places. [2025-02-06 12:59:19,337 INFO L471 AbstractCegarLoop]: Abstraction has has 184 places, 187 transitions, 443 flow [2025-02-06 12:59:19,337 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:59:19,337 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:19,337 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:19,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-06 12:59:19,538 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:19,538 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-02-06 12:59:19,539 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:19,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1625332813, now seen corresponding path program 1 times [2025-02-06 12:59:19,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:59:19,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1574964073] [2025-02-06 12:59:19,540 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:19,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:19,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:19,546 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:59:19,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-06 12:59:19,625 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-06 12:59:19,739 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-06 12:59:19,739 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:19,739 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:19,756 INFO L256 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-06 12:59:19,757 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:19,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2025-02-06 12:59:19,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:59:19,773 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 12:59:19,773 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:59:19,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574964073] [2025-02-06 12:59:19,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574964073] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:59:19,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:59:19,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 12:59:19,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89687899] [2025-02-06 12:59:19,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:59:19,774 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 12:59:19,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:59:19,774 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 12:59:19,774 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 12:59:19,944 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 213 [2025-02-06 12:59:19,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 187 transitions, 443 flow. Second operand has 4 states, 4 states have (on average 110.75) internal successors, (443), 4 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:59:19,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:19,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 213 [2025-02-06 12:59:19,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:20,989 INFO L124 PetriNetUnfolderBase]: 6854/17113 cut-off events. [2025-02-06 12:59:20,990 INFO L125 PetriNetUnfolderBase]: For 247/249 co-relation queries the response was YES. [2025-02-06 12:59:21,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27933 conditions, 17113 events. 6854/17113 cut-off events. For 247/249 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 171233 event pairs, 5822 based on Foata normal form. 0/14742 useless extension candidates. Maximal degree in co-relation 27898. Up to 10129 conditions per place. [2025-02-06 12:59:21,076 INFO L140 encePairwiseOnDemand]: 206/213 looper letters, 70 selfloop transitions, 7 changer transitions 0/185 dead transitions. [2025-02-06 12:59:21,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 185 transitions, 593 flow [2025-02-06 12:59:21,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 12:59:21,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 12:59:21,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 620 transitions. [2025-02-06 12:59:21,078 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5821596244131455 [2025-02-06 12:59:21,078 INFO L175 Difference]: Start difference. First operand has 184 places, 187 transitions, 443 flow. Second operand 5 states and 620 transitions. [2025-02-06 12:59:21,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 185 transitions, 593 flow [2025-02-06 12:59:21,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 185 transitions, 590 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 12:59:21,083 INFO L231 Difference]: Finished difference. Result has 185 places, 185 transitions, 450 flow [2025-02-06 12:59:21,083 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=450, PETRI_PLACES=185, PETRI_TRANSITIONS=185} [2025-02-06 12:59:21,084 INFO L279 CegarLoopForPetriNet]: 182 programPoint places, 3 predicate places. [2025-02-06 12:59:21,085 INFO L471 AbstractCegarLoop]: Abstraction has has 185 places, 185 transitions, 450 flow [2025-02-06 12:59:21,085 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 110.75) internal successors, (443), 4 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:59:21,085 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:21,085 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:21,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-06 12:59:21,290 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:21,290 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-02-06 12:59:21,291 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:21,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1625332814, now seen corresponding path program 1 times [2025-02-06 12:59:21,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:59:21,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2131889528] [2025-02-06 12:59:21,292 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:21,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:21,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:21,294 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:59:21,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-06 12:59:21,361 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-06 12:59:21,503 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-06 12:59:21,503 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:21,503 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:21,521 INFO L256 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 12:59:21,522 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:21,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-02-06 12:59:21,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:59:21,558 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 12:59:21,558 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:59:21,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131889528] [2025-02-06 12:59:21,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131889528] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:59:21,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:59:21,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 12:59:21,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497557334] [2025-02-06 12:59:21,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:59:21,558 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 12:59:21,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:59:21,562 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 12:59:21,563 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 12:59:21,786 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 213 [2025-02-06 12:59:21,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 185 transitions, 450 flow. Second operand has 4 states, 4 states have (on average 112.5) internal successors, (450), 4 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:59:21,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:21,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 213 [2025-02-06 12:59:21,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:22,869 INFO L124 PetriNetUnfolderBase]: 6854/17109 cut-off events. [2025-02-06 12:59:22,869 INFO L125 PetriNetUnfolderBase]: For 251/253 co-relation queries the response was YES. [2025-02-06 12:59:22,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27937 conditions, 17109 events. 6854/17109 cut-off events. For 251/253 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 171265 event pairs, 5822 based on Foata normal form. 4/14742 useless extension candidates. Maximal degree in co-relation 27897. Up to 10131 conditions per place. [2025-02-06 12:59:22,947 INFO L140 encePairwiseOnDemand]: 208/213 looper letters, 73 selfloop transitions, 4 changer transitions 0/183 dead transitions. [2025-02-06 12:59:22,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 183 transitions, 600 flow [2025-02-06 12:59:22,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 12:59:22,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 12:59:22,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 519 transitions. [2025-02-06 12:59:22,949 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6091549295774648 [2025-02-06 12:59:22,949 INFO L175 Difference]: Start difference. First operand has 185 places, 185 transitions, 450 flow. Second operand 4 states and 519 transitions. [2025-02-06 12:59:22,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 183 transitions, 600 flow [2025-02-06 12:59:22,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 183 transitions, 586 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 12:59:22,952 INFO L231 Difference]: Finished difference. Result has 182 places, 183 transitions, 440 flow [2025-02-06 12:59:22,952 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=440, PETRI_PLACES=182, PETRI_TRANSITIONS=183} [2025-02-06 12:59:22,954 INFO L279 CegarLoopForPetriNet]: 182 programPoint places, 0 predicate places. [2025-02-06 12:59:22,954 INFO L471 AbstractCegarLoop]: Abstraction has has 182 places, 183 transitions, 440 flow [2025-02-06 12:59:22,954 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 112.5) internal successors, (450), 4 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:59:22,954 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:22,954 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:22,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-02-06 12:59:23,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:23,155 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)] === [2025-02-06 12:59:23,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:23,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1423234760, now seen corresponding path program 1 times [2025-02-06 12:59:23,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:59:23,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1544233447] [2025-02-06 12:59:23,157 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:23,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:23,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:23,159 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:59:23,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-06 12:59:23,231 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-06 12:59:23,395 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-06 12:59:23,395 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:23,395 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:23,415 INFO L256 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-06 12:59:23,416 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:23,457 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2025-02-06 12:59:23,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2025-02-06 12:59:23,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:59:23,480 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 12:59:23,480 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:59:23,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544233447] [2025-02-06 12:59:23,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544233447] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:59:23,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:59:23,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 12:59:23,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627491566] [2025-02-06 12:59:23,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:59:23,481 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 12:59:23,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:59:23,481 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 12:59:23,481 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 12:59:23,674 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 213 [2025-02-06 12:59:23,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 183 transitions, 440 flow. Second operand has 4 states, 4 states have (on average 113.75) internal successors, (455), 4 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:59:23,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:23,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 213 [2025-02-06 12:59:23,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:25,015 INFO L124 PetriNetUnfolderBase]: 6917/15925 cut-off events. [2025-02-06 12:59:25,015 INFO L125 PetriNetUnfolderBase]: For 310/327 co-relation queries the response was YES. [2025-02-06 12:59:25,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27030 conditions, 15925 events. 6917/15925 cut-off events. For 310/327 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 152089 event pairs, 4107 based on Foata normal form. 17/13829 useless extension candidates. Maximal degree in co-relation 26995. Up to 7207 conditions per place. [2025-02-06 12:59:25,114 INFO L140 encePairwiseOnDemand]: 207/213 looper letters, 116 selfloop transitions, 5 changer transitions 0/225 dead transitions. [2025-02-06 12:59:25,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 225 transitions, 766 flow [2025-02-06 12:59:25,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 12:59:25,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 12:59:25,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 567 transitions. [2025-02-06 12:59:25,116 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6654929577464789 [2025-02-06 12:59:25,116 INFO L175 Difference]: Start difference. First operand has 182 places, 183 transitions, 440 flow. Second operand 4 states and 567 transitions. [2025-02-06 12:59:25,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 225 transitions, 766 flow [2025-02-06 12:59:25,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 225 transitions, 758 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 12:59:25,121 INFO L231 Difference]: Finished difference. Result has 180 places, 181 transitions, 438 flow [2025-02-06 12:59:25,121 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=438, PETRI_PLACES=180, PETRI_TRANSITIONS=181} [2025-02-06 12:59:25,122 INFO L279 CegarLoopForPetriNet]: 182 programPoint places, -2 predicate places. [2025-02-06 12:59:25,122 INFO L471 AbstractCegarLoop]: Abstraction has has 180 places, 181 transitions, 438 flow [2025-02-06 12:59:25,122 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 113.75) internal successors, (455), 4 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:59:25,122 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:25,122 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:25,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-02-06 12:59:25,326 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:25,326 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)] === [2025-02-06 12:59:25,326 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:25,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1423234759, now seen corresponding path program 1 times [2025-02-06 12:59:25,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:59:25,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1502920224] [2025-02-06 12:59:25,327 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:25,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:25,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:25,329 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:59:25,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-06 12:59:25,424 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-06 12:59:25,579 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-06 12:59:25,579 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:25,580 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:25,599 INFO L256 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-06 12:59:25,600 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:25,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 12:59:25,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-02-06 12:59:25,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:59:25,748 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 12:59:25,748 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:59:25,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502920224] [2025-02-06 12:59:25,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502920224] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:59:25,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:59:25,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 12:59:25,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109583701] [2025-02-06 12:59:25,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:59:25,750 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 12:59:25,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:59:25,750 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 12:59:25,750 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 12:59:26,076 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 213 [2025-02-06 12:59:26,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 181 transitions, 438 flow. Second operand has 5 states, 5 states have (on average 113.4) internal successors, (567), 5 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:59:26,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:26,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 213 [2025-02-06 12:59:26,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:27,754 INFO L124 PetriNetUnfolderBase]: 6992/17398 cut-off events. [2025-02-06 12:59:27,755 INFO L125 PetriNetUnfolderBase]: For 816/819 co-relation queries the response was YES. [2025-02-06 12:59:27,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29008 conditions, 17398 events. 6992/17398 cut-off events. For 816/819 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 174466 event pairs, 5947 based on Foata normal form. 2/15001 useless extension candidates. Maximal degree in co-relation 28916. Up to 10360 conditions per place. [2025-02-06 12:59:27,858 INFO L140 encePairwiseOnDemand]: 207/213 looper letters, 81 selfloop transitions, 5 changer transitions 0/188 dead transitions. [2025-02-06 12:59:27,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 188 transitions, 640 flow [2025-02-06 12:59:27,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 12:59:27,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 12:59:27,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 533 transitions. [2025-02-06 12:59:27,861 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6255868544600939 [2025-02-06 12:59:27,861 INFO L175 Difference]: Start difference. First operand has 180 places, 181 transitions, 438 flow. Second operand 4 states and 533 transitions. [2025-02-06 12:59:27,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 188 transitions, 640 flow [2025-02-06 12:59:27,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 188 transitions, 624 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 12:59:27,867 INFO L231 Difference]: Finished difference. Result has 182 places, 185 transitions, 474 flow [2025-02-06 12:59:27,868 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=474, PETRI_PLACES=182, PETRI_TRANSITIONS=185} [2025-02-06 12:59:27,868 INFO L279 CegarLoopForPetriNet]: 182 programPoint places, 0 predicate places. [2025-02-06 12:59:27,868 INFO L471 AbstractCegarLoop]: Abstraction has has 182 places, 185 transitions, 474 flow [2025-02-06 12:59:27,869 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 113.4) internal successors, (567), 5 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:59:27,869 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:27,869 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:27,882 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-02-06 12:59:28,069 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:28,070 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-02-06 12:59:28,070 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:28,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1170603650, now seen corresponding path program 1 times [2025-02-06 12:59:28,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:59:28,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1851751870] [2025-02-06 12:59:28,070 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:28,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:28,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:28,073 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:59:28,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-06 12:59:28,153 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-06 12:59:28,305 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-06 12:59:28,305 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:28,305 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:28,324 INFO L256 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-02-06 12:59:28,326 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:28,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-06 12:59:28,427 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 [2025-02-06 12:59:28,463 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-02-06 12:59:28,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2025-02-06 12:59:28,502 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 [2025-02-06 12:59:28,566 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 [2025-02-06 12:59:28,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2025-02-06 12:59:28,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:59:28,678 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 12:59:28,678 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:59:28,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851751870] [2025-02-06 12:59:28,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851751870] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:59:28,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:59:28,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-02-06 12:59:28,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896997509] [2025-02-06 12:59:28,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:59:28,678 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-06 12:59:28,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:59:28,678 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-06 12:59:28,678 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2025-02-06 12:59:30,408 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 213 [2025-02-06 12:59:30,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 185 transitions, 474 flow. Second operand has 10 states, 10 states have (on average 100.0) internal successors, (1000), 10 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:59:30,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:30,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 213 [2025-02-06 12:59:30,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:32,293 INFO L124 PetriNetUnfolderBase]: 6992/17397 cut-off events. [2025-02-06 12:59:32,293 INFO L125 PetriNetUnfolderBase]: For 336/339 co-relation queries the response was YES. [2025-02-06 12:59:32,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28555 conditions, 17397 events. 6992/17397 cut-off events. For 336/339 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 174449 event pairs, 5947 based on Foata normal form. 0/15013 useless extension candidates. Maximal degree in co-relation 28462. Up to 10369 conditions per place. [2025-02-06 12:59:32,410 INFO L140 encePairwiseOnDemand]: 201/213 looper letters, 94 selfloop transitions, 11 changer transitions 0/201 dead transitions. [2025-02-06 12:59:32,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 201 transitions, 722 flow [2025-02-06 12:59:32,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-06 12:59:32,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-02-06 12:59:32,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1194 transitions. [2025-02-06 12:59:32,416 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5096030729833547 [2025-02-06 12:59:32,416 INFO L175 Difference]: Start difference. First operand has 182 places, 185 transitions, 474 flow. Second operand 11 states and 1194 transitions. [2025-02-06 12:59:32,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 201 transitions, 722 flow [2025-02-06 12:59:32,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 201 transitions, 720 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 12:59:32,423 INFO L231 Difference]: Finished difference. Result has 196 places, 190 transitions, 530 flow [2025-02-06 12:59:32,423 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=530, PETRI_PLACES=196, PETRI_TRANSITIONS=190} [2025-02-06 12:59:32,424 INFO L279 CegarLoopForPetriNet]: 182 programPoint places, 14 predicate places. [2025-02-06 12:59:32,424 INFO L471 AbstractCegarLoop]: Abstraction has has 196 places, 190 transitions, 530 flow [2025-02-06 12:59:32,425 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 100.0) internal successors, (1000), 10 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:59:32,425 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:32,425 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:32,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-02-06 12:59:32,625 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:32,625 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-02-06 12:59:32,626 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:32,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1170603649, now seen corresponding path program 1 times [2025-02-06 12:59:32,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:59:32,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [987303570] [2025-02-06 12:59:32,626 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:32,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:32,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:32,629 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:59:32,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-06 12:59:32,710 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-06 12:59:32,868 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-06 12:59:32,868 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:32,868 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:32,887 INFO L256 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 35 conjuncts are in the unsatisfiable core [2025-02-06 12:59:32,889 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:32,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-06 12:59:32,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-06 12:59:32,993 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 [2025-02-06 12:59:33,007 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 [2025-02-06 12:59:33,066 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-02-06 12:59:33,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2025-02-06 12:59:33,088 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-02-06 12:59:33,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2025-02-06 12:59:33,134 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 [2025-02-06 12:59:33,148 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 [2025-02-06 12:59:33,191 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 [2025-02-06 12:59:33,198 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 [2025-02-06 12:59:33,229 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 [2025-02-06 12:59:33,236 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 [2025-02-06 12:59:33,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:59:33,284 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 12:59:33,284 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:59:33,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987303570] [2025-02-06 12:59:33,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987303570] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:59:33,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:59:33,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-02-06 12:59:33,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053583196] [2025-02-06 12:59:33,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:59:33,285 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-06 12:59:33,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:59:33,285 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-06 12:59:33,285 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-02-06 12:59:35,156 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 213 [2025-02-06 12:59:35,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 190 transitions, 530 flow. Second operand has 10 states, 10 states have (on average 98.0) internal successors, (980), 10 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:59:35,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:35,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 213 [2025-02-06 12:59:35,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:36,845 INFO L124 PetriNetUnfolderBase]: 6992/17396 cut-off events. [2025-02-06 12:59:36,845 INFO L125 PetriNetUnfolderBase]: For 347/350 co-relation queries the response was YES. [2025-02-06 12:59:36,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28592 conditions, 17396 events. 6992/17396 cut-off events. For 347/350 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 174374 event pairs, 5947 based on Foata normal form. 1/15016 useless extension candidates. Maximal degree in co-relation 28511. Up to 10373 conditions per place. [2025-02-06 12:59:36,939 INFO L140 encePairwiseOnDemand]: 201/213 looper letters, 96 selfloop transitions, 11 changer transitions 0/201 dead transitions. [2025-02-06 12:59:36,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 201 transitions, 774 flow [2025-02-06 12:59:36,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-06 12:59:36,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-02-06 12:59:36,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1174 transitions. [2025-02-06 12:59:36,946 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5010670081092616 [2025-02-06 12:59:36,946 INFO L175 Difference]: Start difference. First operand has 196 places, 190 transitions, 530 flow. Second operand 11 states and 1174 transitions. [2025-02-06 12:59:36,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 201 transitions, 774 flow [2025-02-06 12:59:36,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 201 transitions, 770 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 12:59:36,953 INFO L231 Difference]: Finished difference. Result has 205 places, 190 transitions, 552 flow [2025-02-06 12:59:36,954 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=526, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=552, PETRI_PLACES=205, PETRI_TRANSITIONS=190} [2025-02-06 12:59:36,956 INFO L279 CegarLoopForPetriNet]: 182 programPoint places, 23 predicate places. [2025-02-06 12:59:36,956 INFO L471 AbstractCegarLoop]: Abstraction has has 205 places, 190 transitions, 552 flow [2025-02-06 12:59:36,957 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 98.0) internal successors, (980), 10 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:59:36,957 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:36,957 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:36,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-02-06 12:59:37,158 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:37,159 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-02-06 12:59:37,160 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:37,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1928973909, now seen corresponding path program 1 times [2025-02-06 12:59:37,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:59:37,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [181146395] [2025-02-06 12:59:37,161 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:37,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:37,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:37,163 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:59:37,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-06 12:59:37,258 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 12:59:37,444 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 12:59:37,444 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:37,444 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:37,465 INFO L256 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-06 12:59:37,468 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:37,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-02-06 12:59:37,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:59:37,517 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 12:59:37,517 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:59:37,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181146395] [2025-02-06 12:59:37,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181146395] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:59:37,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:59:37,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 12:59:37,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131259818] [2025-02-06 12:59:37,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:59:37,518 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 12:59:37,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:59:37,518 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 12:59:37,518 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 12:59:37,822 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 213 [2025-02-06 12:59:37,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 190 transitions, 552 flow. Second operand has 4 states, 4 states have (on average 115.0) internal successors, (460), 4 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:59:37,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:37,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 213 [2025-02-06 12:59:37,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:38,964 INFO L124 PetriNetUnfolderBase]: 6854/16857 cut-off events. [2025-02-06 12:59:38,964 INFO L125 PetriNetUnfolderBase]: For 294/296 co-relation queries the response was YES. [2025-02-06 12:59:39,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27741 conditions, 16857 events. 6854/16857 cut-off events. For 294/296 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 167179 event pairs, 5821 based on Foata normal form. 8/14433 useless extension candidates. Maximal degree in co-relation 27667. Up to 10128 conditions per place. [2025-02-06 12:59:39,134 INFO L140 encePairwiseOnDemand]: 208/213 looper letters, 73 selfloop transitions, 9 changer transitions 0/188 dead transitions. [2025-02-06 12:59:39,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 188 transitions, 712 flow [2025-02-06 12:59:39,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 12:59:39,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 12:59:39,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 525 transitions. [2025-02-06 12:59:39,136 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6161971830985915 [2025-02-06 12:59:39,136 INFO L175 Difference]: Start difference. First operand has 205 places, 190 transitions, 552 flow. Second operand 4 states and 525 transitions. [2025-02-06 12:59:39,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 188 transitions, 712 flow [2025-02-06 12:59:39,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 188 transitions, 690 flow, removed 0 selfloop flow, removed 10 redundant places. [2025-02-06 12:59:39,144 INFO L231 Difference]: Finished difference. Result has 196 places, 188 transitions, 544 flow [2025-02-06 12:59:39,145 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=526, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=544, PETRI_PLACES=196, PETRI_TRANSITIONS=188} [2025-02-06 12:59:39,147 INFO L279 CegarLoopForPetriNet]: 182 programPoint places, 14 predicate places. [2025-02-06 12:59:39,147 INFO L471 AbstractCegarLoop]: Abstraction has has 196 places, 188 transitions, 544 flow [2025-02-06 12:59:39,147 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 115.0) internal successors, (460), 4 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:59:39,148 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:39,148 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:39,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-02-06 12:59:39,348 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:39,349 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-02-06 12:59:39,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:39,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1928973910, now seen corresponding path program 1 times [2025-02-06 12:59:39,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:59:39,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [12813130] [2025-02-06 12:59:39,351 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:39,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:39,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:39,354 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:59:39,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-02-06 12:59:39,433 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 12:59:39,552 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 12:59:39,552 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:39,552 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:39,569 INFO L256 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-06 12:59:39,570 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:39,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:59:39,585 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 12:59:39,585 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:59:39,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12813130] [2025-02-06 12:59:39,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12813130] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:59:39,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:59:39,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 12:59:39,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139210813] [2025-02-06 12:59:39,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:59:39,586 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 12:59:39,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:59:39,586 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 12:59:39,586 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 12:59:39,722 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 213 [2025-02-06 12:59:39,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 188 transitions, 544 flow. Second operand has 4 states, 4 states have (on average 113.0) internal successors, (452), 4 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:59:39,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:39,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 213 [2025-02-06 12:59:39,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:40,878 INFO L124 PetriNetUnfolderBase]: 6854/16849 cut-off events. [2025-02-06 12:59:40,878 INFO L125 PetriNetUnfolderBase]: For 299/301 co-relation queries the response was YES. [2025-02-06 12:59:40,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27742 conditions, 16849 events. 6854/16849 cut-off events. For 299/301 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 167027 event pairs, 5821 based on Foata normal form. 0/14425 useless extension candidates. Maximal degree in co-relation 27675. Up to 10128 conditions per place. [2025-02-06 12:59:40,974 INFO L140 encePairwiseOnDemand]: 208/213 looper letters, 75 selfloop transitions, 9 changer transitions 0/186 dead transitions. [2025-02-06 12:59:40,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 186 transitions, 708 flow [2025-02-06 12:59:40,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 12:59:40,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 12:59:40,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 519 transitions. [2025-02-06 12:59:40,976 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6091549295774648 [2025-02-06 12:59:40,976 INFO L175 Difference]: Start difference. First operand has 196 places, 188 transitions, 544 flow. Second operand 4 states and 519 transitions. [2025-02-06 12:59:40,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 186 transitions, 708 flow [2025-02-06 12:59:40,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 186 transitions, 690 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 12:59:40,981 INFO L231 Difference]: Finished difference. Result has 194 places, 186 transitions, 540 flow [2025-02-06 12:59:40,982 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=522, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=540, PETRI_PLACES=194, PETRI_TRANSITIONS=186} [2025-02-06 12:59:40,983 INFO L279 CegarLoopForPetriNet]: 182 programPoint places, 12 predicate places. [2025-02-06 12:59:40,983 INFO L471 AbstractCegarLoop]: Abstraction has has 194 places, 186 transitions, 540 flow [2025-02-06 12:59:40,983 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 113.0) internal successors, (452), 4 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:59:40,983 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:40,983 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:41,002 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-02-06 12:59:41,184 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:41,184 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)] === [2025-02-06 12:59:41,185 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:41,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1760010502, now seen corresponding path program 1 times [2025-02-06 12:59:41,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:59:41,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1830307100] [2025-02-06 12:59:41,185 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:41,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:41,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:41,187 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:59:41,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-02-06 12:59:41,287 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-06 12:59:41,429 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 12:59:41,429 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:41,429 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:41,448 INFO L256 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-02-06 12:59:41,449 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:41,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:59:41,468 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:59:41,493 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:59:41,493 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:59:41,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830307100] [2025-02-06 12:59:41,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830307100] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:59:41,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-06 12:59:41,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2025-02-06 12:59:41,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212079542] [2025-02-06 12:59:41,493 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-06 12:59:41,494 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 12:59:41,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:59:41,494 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 12:59:41,494 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-02-06 12:59:41,494 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 213 [2025-02-06 12:59:41,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 186 transitions, 540 flow. Second operand has 6 states, 6 states have (on average 118.83333333333333) internal successors, (713), 6 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:59:41,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:41,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 213 [2025-02-06 12:59:41,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:59:42,820 INFO L124 PetriNetUnfolderBase]: 6854/16899 cut-off events. [2025-02-06 12:59:42,820 INFO L125 PetriNetUnfolderBase]: For 378/380 co-relation queries the response was YES. [2025-02-06 12:59:42,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27868 conditions, 16899 events. 6854/16899 cut-off events. For 378/380 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 167507 event pairs, 5821 based on Foata normal form. 6/14477 useless extension candidates. Maximal degree in co-relation 27793. Up to 10124 conditions per place. [2025-02-06 12:59:43,085 INFO L140 encePairwiseOnDemand]: 209/213 looper letters, 90 selfloop transitions, 11 changer transitions 0/205 dead transitions. [2025-02-06 12:59:43,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 205 transitions, 864 flow [2025-02-06 12:59:43,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 12:59:43,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 12:59:43,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 786 transitions. [2025-02-06 12:59:43,088 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6150234741784038 [2025-02-06 12:59:43,088 INFO L175 Difference]: Start difference. First operand has 194 places, 186 transitions, 540 flow. Second operand 6 states and 786 transitions. [2025-02-06 12:59:43,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 205 transitions, 864 flow [2025-02-06 12:59:43,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 205 transitions, 820 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 12:59:43,093 INFO L231 Difference]: Finished difference. Result has 200 places, 191 transitions, 608 flow [2025-02-06 12:59:43,093 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=522, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=608, PETRI_PLACES=200, PETRI_TRANSITIONS=191} [2025-02-06 12:59:43,094 INFO L279 CegarLoopForPetriNet]: 182 programPoint places, 18 predicate places. [2025-02-06 12:59:43,094 INFO L471 AbstractCegarLoop]: Abstraction has has 200 places, 191 transitions, 608 flow [2025-02-06 12:59:43,094 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 118.83333333333333) internal successors, (713), 6 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:59:43,095 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:59:43,095 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:59:43,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-02-06 12:59:43,299 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:43,299 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)] === [2025-02-06 12:59:43,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:59:43,300 INFO L85 PathProgramCache]: Analyzing trace with hash 540788734, now seen corresponding path program 1 times [2025-02-06 12:59:43,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:59:43,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1174697765] [2025-02-06 12:59:43,301 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:59:43,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:59:43,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:59:43,303 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:59:43,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-02-06 12:59:43,402 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-06 12:59:43,582 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-06 12:59:43,582 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:59:43,582 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:59:43,603 INFO L256 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-02-06 12:59:43,606 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:59:43,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2025-02-06 12:59:43,703 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 [2025-02-06 12:59:43,759 INFO L349 Elim1Store]: treesize reduction 90, result has 30.2 percent of original size [2025-02-06 12:59:43,760 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 [2025-02-06 12:59:43,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 29 [2025-02-06 12:59:43,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 29 [2025-02-06 12:59:43,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 21 [2025-02-06 12:59:43,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-02-06 12:59:44,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:59:44,007 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:59:44,082 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_571 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_571) |c_~#c~0.base|) (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|))))))) is different from false [2025-02-06 12:59:44,256 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 12:59:44,256 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 [2025-02-06 12:59:44,269 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 12:59:44,269 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 [2025-02-06 12:59:44,275 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 [2025-02-06 12:59:53,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2025-02-06 12:59:53,691 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:59:53,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174697765] [2025-02-06 12:59:53,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174697765] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:59:53,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-06 12:59:53,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2025-02-06 12:59:53,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198311232] [2025-02-06 12:59:53,691 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-06 12:59:53,691 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-06 12:59:53,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:59:53,692 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-06 12:59:53,692 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=214, Unknown=14, NotChecked=30, Total=306 [2025-02-06 12:59:54,015 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 213 [2025-02-06 12:59:54,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 191 transitions, 608 flow. Second operand has 18 states, 18 states have (on average 63.888888888888886) internal successors, (1150), 18 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 12:59:54,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:59:54,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 213 [2025-02-06 12:59:54,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:00:04,327 INFO L124 PetriNetUnfolderBase]: 27748/55875 cut-off events. [2025-02-06 13:00:04,328 INFO L125 PetriNetUnfolderBase]: For 668/669 co-relation queries the response was YES. [2025-02-06 13:00:04,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98438 conditions, 55875 events. 27748/55875 cut-off events. For 668/669 co-relation queries the response was YES. Maximal size of possible extension queue 1577. Compared 577275 event pairs, 24779 based on Foata normal form. 0/42193 useless extension candidates. Maximal degree in co-relation 98350. Up to 40959 conditions per place. [2025-02-06 13:00:04,630 INFO L140 encePairwiseOnDemand]: 205/213 looper letters, 116 selfloop transitions, 24 changer transitions 0/202 dead transitions. [2025-02-06 13:00:04,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 202 transitions, 928 flow [2025-02-06 13:00:04,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-06 13:00:04,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-02-06 13:00:04,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 806 transitions. [2025-02-06 13:00:04,632 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3440034144259496 [2025-02-06 13:00:04,633 INFO L175 Difference]: Start difference. First operand has 200 places, 191 transitions, 608 flow. Second operand 11 states and 806 transitions. [2025-02-06 13:00:04,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 202 transitions, 928 flow [2025-02-06 13:00:04,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 202 transitions, 912 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-02-06 13:00:04,637 INFO L231 Difference]: Finished difference. Result has 212 places, 196 transitions, 682 flow [2025-02-06 13:00:04,637 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=592, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=682, PETRI_PLACES=212, PETRI_TRANSITIONS=196} [2025-02-06 13:00:04,637 INFO L279 CegarLoopForPetriNet]: 182 programPoint places, 30 predicate places. [2025-02-06 13:00:04,637 INFO L471 AbstractCegarLoop]: Abstraction has has 212 places, 196 transitions, 682 flow [2025-02-06 13:00:04,638 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 63.888888888888886) internal successors, (1150), 18 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:00:04,638 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:00:04,638 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:00:04,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-02-06 13:00:04,838 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:00:04,839 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)] === [2025-02-06 13:00:04,839 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:00:04,839 INFO L85 PathProgramCache]: Analyzing trace with hash 540788735, now seen corresponding path program 1 times [2025-02-06 13:00:04,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 13:00:04,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [478388255] [2025-02-06 13:00:04,840 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:00:04,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:00:04,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:00:04,842 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:00:04,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-02-06 13:00:05,036 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-06 13:00:05,258 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-06 13:00:05,258 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:00:05,258 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:00:05,280 INFO L256 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-02-06 13:00:05,282 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:00:05,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2025-02-06 13:00:05,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-02-06 13:00:05,448 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 [2025-02-06 13:00:05,454 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 [2025-02-06 13:00:05,498 INFO L349 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2025-02-06 13:00:05,498 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 22 treesize of output 29 [2025-02-06 13:00:05,530 INFO L349 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2025-02-06 13:00:05,530 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 [2025-02-06 13:00:05,565 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 [2025-02-06 13:00:05,574 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 [2025-02-06 13:00:05,610 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 [2025-02-06 13:00:05,620 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 20 treesize of output 15 [2025-02-06 13:00:05,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 19 [2025-02-06 13:00:05,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-02-06 13:00:05,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2025-02-06 13:00:05,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:00:05,689 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:00:05,795 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|)))) (and (forall ((v_ArrVal_678 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_678) |c_~#c~0.base|) .cse1))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (forall ((v_ArrVal_678 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_679 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_678) |c_~#c~0.base|) .cse1)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_679) |c_~#c~0.base|) .cse1)))))) is different from false [2025-02-06 13:00:05,826 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|)))) (and (forall ((v_ArrVal_678 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_679 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_678) |c_~#c~0.base|) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_679) |c_~#c~0.base|) .cse0)))) (forall ((v_ArrVal_678 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_678) |c_~#c~0.base|) .cse0))) (bvule (bvadd (_ bv4 32) .cse1) (bvadd (_ bv8 32) .cse1)))))) is different from false [2025-02-06 13:00:06,041 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:00:06,041 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 [2025-02-06 13:00:06,048 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:00:06,048 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 [2025-02-06 13:00:06,068 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:00:06,068 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 74 treesize of output 77 [2025-02-06 13:00:06,090 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:00:06,090 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 118 treesize of output 113 [2025-02-06 13:00:06,099 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 26 treesize of output 20 [2025-02-06 13:00:06,105 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 [2025-02-06 13:00:06,575 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:00:06,576 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 [2025-02-06 13:00:06,591 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:00:06,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 55 [2025-02-06 13:00:06,598 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 [2025-02-06 13:00:10,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2025-02-06 13:00:10,681 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 13:00:10,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478388255] [2025-02-06 13:00:10,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478388255] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:00:10,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:00:10,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2025-02-06 13:00:10,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581216762] [2025-02-06 13:00:10,682 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-06 13:00:10,682 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-06 13:00:10,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 13:00:10,682 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-06 13:00:10,682 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=230, Unknown=3, NotChecked=62, Total=342 [2025-02-06 13:00:10,683 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 213 [2025-02-06 13:00:10,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 196 transitions, 682 flow. Second operand has 19 states, 19 states have (on average 47.78947368421053) internal successors, (908), 19 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) [2025-02-06 13:00:10,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:00:10,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 213 [2025-02-06 13:00:10,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:00:29,433 INFO L124 PetriNetUnfolderBase]: 47994/86740 cut-off events. [2025-02-06 13:00:29,433 INFO L125 PetriNetUnfolderBase]: For 840/841 co-relation queries the response was YES. [2025-02-06 13:00:29,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159755 conditions, 86740 events. 47994/86740 cut-off events. For 840/841 co-relation queries the response was YES. Maximal size of possible extension queue 2466. Compared 862017 event pairs, 43378 based on Foata normal form. 6/54997 useless extension candidates. Maximal degree in co-relation 159677. Up to 70881 conditions per place. [2025-02-06 13:00:29,956 INFO L140 encePairwiseOnDemand]: 203/213 looper letters, 129 selfloop transitions, 26 changer transitions 0/201 dead transitions. [2025-02-06 13:00:29,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 201 transitions, 1006 flow [2025-02-06 13:00:29,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-06 13:00:29,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-02-06 13:00:29,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 737 transitions. [2025-02-06 13:00:29,958 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.26616106897797037 [2025-02-06 13:00:29,959 INFO L175 Difference]: Start difference. First operand has 212 places, 196 transitions, 682 flow. Second operand 13 states and 737 transitions. [2025-02-06 13:00:29,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 201 transitions, 1006 flow [2025-02-06 13:00:29,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 201 transitions, 976 flow, removed 10 selfloop flow, removed 3 redundant places. [2025-02-06 13:00:29,972 INFO L231 Difference]: Finished difference. Result has 223 places, 198 transitions, 718 flow [2025-02-06 13:00:29,972 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=652, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=718, PETRI_PLACES=223, PETRI_TRANSITIONS=198} [2025-02-06 13:00:29,972 INFO L279 CegarLoopForPetriNet]: 182 programPoint places, 41 predicate places. [2025-02-06 13:00:29,973 INFO L471 AbstractCegarLoop]: Abstraction has has 223 places, 198 transitions, 718 flow [2025-02-06 13:00:29,973 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 47.78947368421053) internal successors, (908), 19 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) [2025-02-06 13:00:29,974 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:00:29,974 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1] [2025-02-06 13:00:30,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-02-06 13:00:30,174 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:00:30,175 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)] === [2025-02-06 13:00:30,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:00:30,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1234569862, now seen corresponding path program 2 times [2025-02-06 13:00:30,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 13:00:30,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [647719699] [2025-02-06 13:00:30,176 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:00:30,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:00:30,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:00:30,178 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:00:30,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-02-06 13:00:30,306 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-02-06 13:00:30,537 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-02-06 13:00:30,537 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:00:30,537 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:00:30,567 INFO L256 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-06 13:00:30,568 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:00:30,642 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:00:30,643 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:00:30,756 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:00:30,757 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 13:00:30,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647719699] [2025-02-06 13:00:30,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647719699] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:00:30,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-06 13:00:30,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2025-02-06 13:00:30,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369709307] [2025-02-06 13:00:30,757 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-06 13:00:30,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-06 13:00:30,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 13:00:30,758 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-06 13:00:30,758 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2025-02-06 13:00:30,759 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 213 [2025-02-06 13:00:30,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 198 transitions, 718 flow. Second operand has 12 states, 12 states have (on average 119.91666666666667) internal successors, (1439), 12 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:00:30,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:00:30,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 213 [2025-02-06 13:00:30,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:00:32,962 INFO L124 PetriNetUnfolderBase]: 6854/17007 cut-off events. [2025-02-06 13:00:32,962 INFO L125 PetriNetUnfolderBase]: For 766/768 co-relation queries the response was YES. [2025-02-06 13:00:33,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28434 conditions, 17007 events. 6854/17007 cut-off events. For 766/768 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 167812 event pairs, 5821 based on Foata normal form. 12/14598 useless extension candidates. Maximal degree in co-relation 28356. Up to 10124 conditions per place. [2025-02-06 13:00:33,150 INFO L140 encePairwiseOnDemand]: 209/213 looper letters, 120 selfloop transitions, 23 changer transitions 0/250 dead transitions. [2025-02-06 13:00:33,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 250 transitions, 1520 flow [2025-02-06 13:00:33,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-06 13:00:33,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-02-06 13:00:33,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1515 transitions. [2025-02-06 13:00:33,153 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5927230046948356 [2025-02-06 13:00:33,153 INFO L175 Difference]: Start difference. First operand has 223 places, 198 transitions, 718 flow. Second operand 12 states and 1515 transitions. [2025-02-06 13:00:33,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 250 transitions, 1520 flow [2025-02-06 13:00:33,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 250 transitions, 1368 flow, removed 0 selfloop flow, removed 10 redundant places. [2025-02-06 13:00:33,158 INFO L231 Difference]: Finished difference. Result has 231 places, 211 transitions, 925 flow [2025-02-06 13:00:33,158 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=670, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=925, PETRI_PLACES=231, PETRI_TRANSITIONS=211} [2025-02-06 13:00:33,159 INFO L279 CegarLoopForPetriNet]: 182 programPoint places, 49 predicate places. [2025-02-06 13:00:33,159 INFO L471 AbstractCegarLoop]: Abstraction has has 231 places, 211 transitions, 925 flow [2025-02-06 13:00:33,159 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 119.91666666666667) internal successors, (1439), 12 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:00:33,160 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:00:33,160 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1] [2025-02-06 13:00:33,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-02-06 13:00:33,361 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:00:33,361 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)] === [2025-02-06 13:00:33,365 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:00:33,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1543374202, now seen corresponding path program 3 times [2025-02-06 13:00:33,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 13:00:33,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1171292163] [2025-02-06 13:00:33,366 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:00:33,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:00:33,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:00:33,368 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:00:33,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-02-06 13:00:33,568 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 97 statements into 12 equivalence classes.