./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 798a7b37 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6efa0097353392a416215c2535cfc6cdc34364d9b0eb2844e37da9edef467642 --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-04 10:04:37,632 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-04 10:04:37,679 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-04 10:04:37,682 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-04 10:04:37,682 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-04 10:04:37,695 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-04 10:04:37,697 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-04 10:04:37,697 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-04 10:04:37,697 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-04 10:04:37,698 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-04 10:04:37,698 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-04 10:04:37,698 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-04 10:04:37,699 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-04 10:04:37,699 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-04 10:04:37,699 INFO L153 SettingsManager]: * Use SBE=true [2025-03-04 10:04:37,699 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-04 10:04:37,699 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-04 10:04:37,699 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-04 10:04:37,700 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-04 10:04:37,700 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-04 10:04:37,700 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-04 10:04:37,700 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-04 10:04:37,700 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-04 10:04:37,700 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-04 10:04:37,700 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-04 10:04:37,700 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-04 10:04:37,700 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-04 10:04:37,700 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-04 10:04:37,700 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-04 10:04:37,700 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-04 10:04:37,701 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-04 10:04:37,701 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-04 10:04:37,701 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-04 10:04:37,701 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 10:04:37,701 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-04 10:04:37,701 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-04 10:04:37,701 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-04 10:04:37,701 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-04 10:04:37,701 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-04 10:04:37,702 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-04 10:04:37,702 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-04 10:04:37,702 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-04 10:04:37,702 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6efa0097353392a416215c2535cfc6cdc34364d9b0eb2844e37da9edef467642 [2025-03-04 10:04:37,917 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-04 10:04:37,925 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-04 10:04:37,927 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-04 10:04:37,928 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-04 10:04:37,928 INFO L274 PluginConnector]: CDTParser initialized [2025-03-04 10:04:37,929 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing.i [2025-03-04 10:04:39,055 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0a050327/6e34398c1a3b471aa93680c65471640f/FLAG4b7093feb [2025-03-04 10:04:39,340 INFO L384 CDTParser]: Found 1 translation units. [2025-03-04 10:04:39,341 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing.i [2025-03-04 10:04:39,361 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0a050327/6e34398c1a3b471aa93680c65471640f/FLAG4b7093feb [2025-03-04 10:04:39,621 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0a050327/6e34398c1a3b471aa93680c65471640f [2025-03-04 10:04:39,622 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-04 10:04:39,624 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-04 10:04:39,624 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-04 10:04:39,625 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-04 10:04:39,627 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-04 10:04:39,628 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 10:04:39" (1/1) ... [2025-03-04 10:04:39,629 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70675efd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:39, skipping insertion in model container [2025-03-04 10:04:39,629 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 10:04:39" (1/1) ... [2025-03-04 10:04:39,665 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-04 10:04:40,017 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:40,017 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:40,018 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:40,019 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:40,047 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 10:04:40,078 ERROR L321 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2025-03-04 10:04:40,079 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2e481b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:40, skipping insertion in model container [2025-03-04 10:04:40,079 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-04 10:04:40,079 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2025-03-04 10:04:40,081 INFO L158 Benchmark]: Toolchain (without parser) took 456.76ms. Allocated memory is still 167.8MB. Free memory was 120.1MB in the beginning and 103.1MB in the end (delta: 16.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-03-04 10:04:40,081 INFO L158 Benchmark]: CDTParser took 0.65ms. Allocated memory is still 201.3MB. Free memory is still 119.1MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-04 10:04:40,082 INFO L158 Benchmark]: CACSL2BoogieTranslator took 454.84ms. Allocated memory is still 167.8MB. Free memory was 120.1MB in the beginning and 103.1MB in the end (delta: 16.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-03-04 10:04:40,084 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.65ms. Allocated memory is still 201.3MB. Free memory is still 119.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 454.84ms. Allocated memory is still 167.8MB. Free memory was 120.1MB in the beginning and 103.1MB in the end (delta: 16.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1051]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6efa0097353392a416215c2535cfc6cdc34364d9b0eb2844e37da9edef467642 --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-04 10:04:41,699 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-04 10:04:41,782 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2025-03-04 10:04:41,789 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-04 10:04:41,791 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-04 10:04:41,811 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-04 10:04:41,812 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-04 10:04:41,812 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-04 10:04:41,813 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-04 10:04:41,813 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-04 10:04:41,814 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-04 10:04:41,814 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-04 10:04:41,814 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-04 10:04:41,814 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-04 10:04:41,814 INFO L153 SettingsManager]: * Use SBE=true [2025-03-04 10:04:41,814 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-04 10:04:41,814 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-04 10:04:41,814 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-04 10:04:41,814 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-04 10:04:41,814 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-04 10:04:41,814 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-04 10:04:41,815 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-04 10:04:41,815 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-04 10:04:41,815 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-04 10:04:41,815 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-04 10:04:41,815 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2025-03-04 10:04:41,815 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2025-03-04 10:04:41,815 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-04 10:04:41,815 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-04 10:04:41,816 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-04 10:04:41,816 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-04 10:04:41,816 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-04 10:04:41,816 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-04 10:04:41,816 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-04 10:04:41,816 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-04 10:04:41,817 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 10:04:41,817 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-04 10:04:41,817 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-04 10:04:41,817 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2025-03-04 10:04:41,817 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2025-03-04 10:04:41,817 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-04 10:04:41,817 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-04 10:04:41,817 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-04 10:04:41,817 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-04 10:04:41,817 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6efa0097353392a416215c2535cfc6cdc34364d9b0eb2844e37da9edef467642 [2025-03-04 10:04:42,036 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-04 10:04:42,042 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-04 10:04:42,044 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-04 10:04:42,045 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-04 10:04:42,045 INFO L274 PluginConnector]: CDTParser initialized [2025-03-04 10:04:42,046 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing.i [2025-03-04 10:04:43,293 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/783a1d596/faff05c704f54dcbb67fd6c6fd194337/FLAGf018bacaa [2025-03-04 10:04:43,523 INFO L384 CDTParser]: Found 1 translation units. [2025-03-04 10:04:43,525 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing.i [2025-03-04 10:04:43,541 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/783a1d596/faff05c704f54dcbb67fd6c6fd194337/FLAGf018bacaa [2025-03-04 10:04:43,554 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/783a1d596/faff05c704f54dcbb67fd6c6fd194337 [2025-03-04 10:04:43,556 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-04 10:04:43,557 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-04 10:04:43,558 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-04 10:04:43,558 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-04 10:04:43,561 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-04 10:04:43,562 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 10:04:43" (1/1) ... [2025-03-04 10:04:43,562 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69f8e446 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:43, skipping insertion in model container [2025-03-04 10:04:43,563 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 10:04:43" (1/1) ... [2025-03-04 10:04:43,593 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-04 10:04:43,858 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:43,858 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:43,858 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:43,858 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:43,879 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 10:04:43,911 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2025-03-04 10:04:43,922 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-04 10:04:43,953 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:43,954 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:43,954 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:43,954 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:43,963 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 10:04:43,980 INFO L200 MainTranslator]: Completed pre-run [2025-03-04 10:04:44,015 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:44,015 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:44,015 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:44,015 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:44,025 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 10:04:44,097 INFO L204 MainTranslator]: Completed translation [2025-03-04 10:04:44,098 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:44 WrapperNode [2025-03-04 10:04:44,099 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-04 10:04:44,101 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-04 10:04:44,101 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-04 10:04:44,101 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-04 10:04:44,105 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:44" (1/1) ... [2025-03-04 10:04:44,128 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:44" (1/1) ... [2025-03-04 10:04:44,151 INFO L138 Inliner]: procedures = 284, calls = 136, calls flagged for inlining = 12, calls inlined = 13, statements flattened = 290 [2025-03-04 10:04:44,151 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-04 10:04:44,151 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-04 10:04:44,152 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-04 10:04:44,152 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-04 10:04:44,159 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:44" (1/1) ... [2025-03-04 10:04:44,159 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:44" (1/1) ... [2025-03-04 10:04:44,163 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:44" (1/1) ... [2025-03-04 10:04:44,185 INFO L175 MemorySlicer]: Split 110 memory accesses to 4 slices as follows [2, 5, 101, 2]. 92 percent of accesses are in the largest equivalence class. The 87 initializations are split as follows [2, 5, 80, 0]. The 13 writes are split as follows [0, 0, 12, 1]. [2025-03-04 10:04:44,188 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:44" (1/1) ... [2025-03-04 10:04:44,189 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:44" (1/1) ... [2025-03-04 10:04:44,208 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:44" (1/1) ... [2025-03-04 10:04:44,210 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:44" (1/1) ... [2025-03-04 10:04:44,213 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:44" (1/1) ... [2025-03-04 10:04:44,214 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:44" (1/1) ... [2025-03-04 10:04:44,221 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-04 10:04:44,222 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-04 10:04:44,222 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-04 10:04:44,222 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-04 10:04:44,223 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:44" (1/1) ... [2025-03-04 10:04:44,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 10:04:44,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:04:44,247 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-04 10:04:44,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-04 10:04:44,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2025-03-04 10:04:44,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2025-03-04 10:04:44,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2025-03-04 10:04:44,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2025-03-04 10:04:44,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-04 10:04:44,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-03-04 10:04:44,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2025-03-04 10:04:44,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2025-03-04 10:04:44,268 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2025-03-04 10:04:44,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-04 10:04:44,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2025-03-04 10:04:44,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2025-03-04 10:04:44,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2025-03-04 10:04:44,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2025-03-04 10:04:44,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2025-03-04 10:04:44,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2025-03-04 10:04:44,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2025-03-04 10:04:44,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2025-03-04 10:04:44,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2025-03-04 10:04:44,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2025-03-04 10:04:44,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2025-03-04 10:04:44,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2025-03-04 10:04:44,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#0 [2025-03-04 10:04:44,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#1 [2025-03-04 10:04:44,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#2 [2025-03-04 10:04:44,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#3 [2025-03-04 10:04:44,270 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-03-04 10:04:44,270 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-03-04 10:04:44,270 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-04 10:04:44,271 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-04 10:04:44,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-03-04 10:04:44,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2025-03-04 10:04:44,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2025-03-04 10:04:44,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2025-03-04 10:04:44,271 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2025-03-04 10:04:44,271 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2025-03-04 10:04:44,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-04 10:04:44,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-04 10:04:44,273 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-04 10:04:44,420 INFO L256 CfgBuilder]: Building ICFG [2025-03-04 10:04:44,421 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-04 10:04:44,986 INFO L1325 $ProcedureCfgBuilder]: dead code at ProgramPoint L1072: havoc main_~#t_ids~0#1.base, main_~#t_ids~0#1.offset; [2025-03-04 10:04:44,986 INFO L1325 $ProcedureCfgBuilder]: dead code at ProgramPoint L1072-1: SUMMARY for call ULTIMATE.dealloc(main_~#t_ids~0#1.base, main_~#t_ids~0#1.offset); srcloc: null [2025-03-04 10:04:45,102 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-04 10:04:45,103 INFO L307 CfgBuilder]: Performing block encoding [2025-03-04 10:04:46,721 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-04 10:04:46,721 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-04 10:04:46,723 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 10:04:46 BoogieIcfgContainer [2025-03-04 10:04:46,723 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-04 10:04:46,724 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-04 10:04:46,724 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-04 10:04:46,728 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-04 10:04:46,729 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.03 10:04:43" (1/3) ... [2025-03-04 10:04:46,730 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@470df12e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 10:04:46, skipping insertion in model container [2025-03-04 10:04:46,731 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:44" (2/3) ... [2025-03-04 10:04:46,731 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@470df12e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 10:04:46, skipping insertion in model container [2025-03-04 10:04:46,731 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 10:04:46" (3/3) ... [2025-03-04 10:04:46,732 INFO L128 eAbstractionObserver]: Analyzing ICFG 28-race_reach_92-evilcollapse_racing.i [2025-03-04 10:04:46,745 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-04 10:04:46,746 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 28-race_reach_92-evilcollapse_racing.i that has 2 procedures, 114 locations, 1 initial locations, 10 loop locations, and 48 error locations. [2025-03-04 10:04:46,746 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-04 10:04:46,811 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2025-03-04 10:04:46,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 132 transitions, 271 flow [2025-03-04 10:04:46,883 INFO L124 PetriNetUnfolderBase]: 18/144 cut-off events. [2025-03-04 10:04:46,885 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-03-04 10:04:46,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 144 events. 18/144 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 529 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 81. Up to 4 conditions per place. [2025-03-04 10:04:46,889 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 132 transitions, 271 flow [2025-03-04 10:04:46,893 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 132 transitions, 271 flow [2025-03-04 10:04:46,901 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-04 10:04:46,911 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;@2adb916e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-04 10:04:46,911 INFO L334 AbstractCegarLoop]: Starting to check reachability of 64 error locations. [2025-03-04 10:04:46,918 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-04 10:04:46,919 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2025-03-04 10:04:46,919 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-04 10:04:46,920 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:04:46,920 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-04 10:04:46,920 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-04 10:04:46,924 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:04:46,924 INFO L85 PathProgramCache]: Analyzing trace with hash 802469, now seen corresponding path program 1 times [2025-03-04 10:04:46,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:04:46,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2039166936] [2025-03-04 10:04:46,936 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:04:46,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:46,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:04:46,939 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:04:46,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-04 10:04:47,039 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-04 10:04:47,179 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-04 10:04:47,179 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:04:47,179 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:04:47,199 INFO L256 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-04 10:04:47,202 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:04:47,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:04:47,252 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:04:47,252 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:04:47,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039166936] [2025-03-04 10:04:47,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039166936] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:04:47,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:04:47,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-04 10:04:47,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003581723] [2025-03-04 10:04:47,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:04:47,259 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 10:04:47,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:04:47,276 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 10:04:47,277 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 10:04:47,458 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 132 [2025-03-04 10:04:47,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 132 transitions, 271 flow. Second operand has 4 states, 4 states have (on average 69.75) internal successors, (279), 4 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:47,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:04:47,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 132 [2025-03-04 10:04:47,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:04:47,785 INFO L124 PetriNetUnfolderBase]: 120/455 cut-off events. [2025-03-04 10:04:47,785 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-04 10:04:47,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 723 conditions, 455 events. 120/455 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2313 event pairs, 61 based on Foata normal form. 47/416 useless extension candidates. Maximal degree in co-relation 636. Up to 170 conditions per place. [2025-03-04 10:04:47,792 INFO L140 encePairwiseOnDemand]: 111/132 looper letters, 64 selfloop transitions, 4 changer transitions 0/137 dead transitions. [2025-03-04 10:04:47,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 137 transitions, 417 flow [2025-03-04 10:04:47,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 10:04:47,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 10:04:47,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 373 transitions. [2025-03-04 10:04:47,801 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7064393939393939 [2025-03-04 10:04:47,802 INFO L175 Difference]: Start difference. First operand has 117 places, 132 transitions, 271 flow. Second operand 4 states and 373 transitions. [2025-03-04 10:04:47,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 137 transitions, 417 flow [2025-03-04 10:04:47,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 137 transitions, 417 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-04 10:04:47,810 INFO L231 Difference]: Finished difference. Result has 116 places, 115 transitions, 251 flow [2025-03-04 10:04:47,813 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=251, PETRI_PLACES=116, PETRI_TRANSITIONS=115} [2025-03-04 10:04:47,815 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, -1 predicate places. [2025-03-04 10:04:47,816 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 115 transitions, 251 flow [2025-03-04 10:04:47,817 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.75) internal successors, (279), 4 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:47,817 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:04:47,817 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-04 10:04:47,832 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-04 10:04:48,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:48,018 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-04 10:04:48,019 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:04:48,019 INFO L85 PathProgramCache]: Analyzing trace with hash 802470, now seen corresponding path program 1 times [2025-03-04 10:04:48,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:04:48,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1023075810] [2025-03-04 10:04:48,019 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:04:48,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:48,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:04:48,022 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:04:48,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-04 10:04:48,104 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-04 10:04:48,266 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-04 10:04:48,267 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:04:48,267 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:04:48,289 INFO L256 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-04 10:04:48,291 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:04:48,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:04:48,342 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:04:48,342 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:04:48,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023075810] [2025-03-04 10:04:48,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023075810] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:04:48,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:04:48,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-04 10:04:48,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534732738] [2025-03-04 10:04:48,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:04:48,343 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 10:04:48,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:04:48,343 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 10:04:48,343 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 10:04:48,583 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 132 [2025-03-04 10:04:48,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 115 transitions, 251 flow. Second operand has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:48,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:04:48,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 132 [2025-03-04 10:04:48,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:04:48,859 INFO L124 PetriNetUnfolderBase]: 122/503 cut-off events. [2025-03-04 10:04:48,860 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2025-03-04 10:04:48,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 829 conditions, 503 events. 122/503 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2557 event pairs, 100 based on Foata normal form. 3/412 useless extension candidates. Maximal degree in co-relation 720. Up to 263 conditions per place. [2025-03-04 10:04:48,864 INFO L140 encePairwiseOnDemand]: 124/132 looper letters, 46 selfloop transitions, 5 changer transitions 0/119 dead transitions. [2025-03-04 10:04:48,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 119 transitions, 367 flow [2025-03-04 10:04:48,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 10:04:48,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 10:04:48,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 342 transitions. [2025-03-04 10:04:48,869 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6477272727272727 [2025-03-04 10:04:48,870 INFO L175 Difference]: Start difference. First operand has 116 places, 115 transitions, 251 flow. Second operand 4 states and 342 transitions. [2025-03-04 10:04:48,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 119 transitions, 367 flow [2025-03-04 10:04:48,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 119 transitions, 355 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-04 10:04:48,873 INFO L231 Difference]: Finished difference. Result has 118 places, 119 transitions, 284 flow [2025-03-04 10:04:48,874 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=284, PETRI_PLACES=118, PETRI_TRANSITIONS=119} [2025-03-04 10:04:48,875 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 1 predicate places. [2025-03-04 10:04:48,875 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 119 transitions, 284 flow [2025-03-04 10:04:48,875 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:48,875 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:04:48,875 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-03-04 10:04:48,889 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-04 10:04:49,076 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:49,076 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-04 10:04:49,077 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:04:49,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1862692647, now seen corresponding path program 1 times [2025-03-04 10:04:49,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:04:49,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1394699645] [2025-03-04 10:04:49,077 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:04:49,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:49,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:04:49,079 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:04:49,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-04 10:04:49,157 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-04 10:04:49,297 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-04 10:04:49,297 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:04:49,297 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:04:49,320 INFO L256 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-04 10:04:49,322 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:04:49,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2025-03-04 10:04:49,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:04:49,346 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:04:49,346 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:04:49,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394699645] [2025-03-04 10:04:49,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394699645] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:04:49,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:04:49,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-04 10:04:49,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581363148] [2025-03-04 10:04:49,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:04:49,347 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-04 10:04:49,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:04:49,347 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-04 10:04:49,348 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 10:04:49,434 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 132 [2025-03-04 10:04:49,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 119 transitions, 284 flow. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:49,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:04:49,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 132 [2025-03-04 10:04:49,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:04:49,640 INFO L124 PetriNetUnfolderBase]: 122/502 cut-off events. [2025-03-04 10:04:49,640 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2025-03-04 10:04:49,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 815 conditions, 502 events. 122/502 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2536 event pairs, 100 based on Foata normal form. 0/407 useless extension candidates. Maximal degree in co-relation 782. Up to 259 conditions per place. [2025-03-04 10:04:49,643 INFO L140 encePairwiseOnDemand]: 129/132 looper letters, 44 selfloop transitions, 3 changer transitions 0/118 dead transitions. [2025-03-04 10:04:49,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 118 transitions, 376 flow [2025-03-04 10:04:49,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-04 10:04:49,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-04 10:04:49,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 269 transitions. [2025-03-04 10:04:49,645 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6792929292929293 [2025-03-04 10:04:49,645 INFO L175 Difference]: Start difference. First operand has 118 places, 119 transitions, 284 flow. Second operand 3 states and 269 transitions. [2025-03-04 10:04:49,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 118 transitions, 376 flow [2025-03-04 10:04:49,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 118 transitions, 373 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-04 10:04:49,648 INFO L231 Difference]: Finished difference. Result has 118 places, 118 transitions, 285 flow [2025-03-04 10:04:49,648 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=285, PETRI_PLACES=118, PETRI_TRANSITIONS=118} [2025-03-04 10:04:49,648 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 1 predicate places. [2025-03-04 10:04:49,648 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 118 transitions, 285 flow [2025-03-04 10:04:49,649 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:49,649 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:04:49,649 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-03-04 10:04:49,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-04 10:04:49,849 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:49,850 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-04 10:04:49,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:04:49,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1862692646, now seen corresponding path program 1 times [2025-03-04 10:04:49,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:04:49,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1242896300] [2025-03-04 10:04:49,851 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:04:49,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:49,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:04:49,854 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:04:49,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-04 10:04:49,920 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-04 10:04:50,057 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-04 10:04:50,058 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:04:50,058 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:04:50,078 INFO L256 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-04 10:04:50,079 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:04:50,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-04 10:04:50,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:04:50,093 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:04:50,093 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:04:50,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242896300] [2025-03-04 10:04:50,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242896300] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:04:50,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:04:50,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-04 10:04:50,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485109219] [2025-03-04 10:04:50,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:04:50,093 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-04 10:04:50,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:04:50,094 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-04 10:04:50,094 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 10:04:50,210 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 132 [2025-03-04 10:04:50,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 118 transitions, 285 flow. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:50,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:04:50,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 132 [2025-03-04 10:04:50,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:04:50,393 INFO L124 PetriNetUnfolderBase]: 122/501 cut-off events. [2025-03-04 10:04:50,393 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2025-03-04 10:04:50,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 815 conditions, 501 events. 122/501 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2534 event pairs, 100 based on Foata normal form. 0/408 useless extension candidates. Maximal degree in co-relation 781. Up to 259 conditions per place. [2025-03-04 10:04:50,400 INFO L140 encePairwiseOnDemand]: 129/132 looper letters, 44 selfloop transitions, 3 changer transitions 0/117 dead transitions. [2025-03-04 10:04:50,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 117 transitions, 377 flow [2025-03-04 10:04:50,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-04 10:04:50,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-04 10:04:50,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 269 transitions. [2025-03-04 10:04:50,401 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6792929292929293 [2025-03-04 10:04:50,401 INFO L175 Difference]: Start difference. First operand has 118 places, 118 transitions, 285 flow. Second operand 3 states and 269 transitions. [2025-03-04 10:04:50,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 117 transitions, 377 flow [2025-03-04 10:04:50,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 117 transitions, 371 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-04 10:04:50,404 INFO L231 Difference]: Finished difference. Result has 117 places, 117 transitions, 283 flow [2025-03-04 10:04:50,404 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=283, PETRI_PLACES=117, PETRI_TRANSITIONS=117} [2025-03-04 10:04:50,404 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 0 predicate places. [2025-03-04 10:04:50,404 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 117 transitions, 283 flow [2025-03-04 10:04:50,408 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:50,408 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:04:50,409 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2025-03-04 10:04:50,424 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-04 10:04:50,609 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:50,609 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-04 10:04:50,610 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:04:50,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1908894477, now seen corresponding path program 1 times [2025-03-04 10:04:50,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:04:50,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1334238845] [2025-03-04 10:04:50,610 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:04:50,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:50,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:04:50,612 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:04:50,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-04 10:04:50,689 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-04 10:04:50,823 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-04 10:04:50,823 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:04:50,823 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:04:50,843 INFO L256 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-03-04 10:04:50,843 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:04:50,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:04:50,852 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:04:50,852 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:04:50,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334238845] [2025-03-04 10:04:50,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334238845] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:04:50,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:04:50,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 10:04:50,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306701923] [2025-03-04 10:04:50,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:04:50,853 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-04 10:04:50,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:04:50,853 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-04 10:04:50,853 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 10:04:50,854 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 132 [2025-03-04 10:04:50,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 117 transitions, 283 flow. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:50,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:04:50,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 132 [2025-03-04 10:04:50,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:04:51,038 INFO L124 PetriNetUnfolderBase]: 121/523 cut-off events. [2025-03-04 10:04:51,039 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2025-03-04 10:04:51,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 843 conditions, 523 events. 121/523 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2577 event pairs, 100 based on Foata normal form. 2/421 useless extension candidates. Maximal degree in co-relation 812. Up to 259 conditions per place. [2025-03-04 10:04:51,041 INFO L140 encePairwiseOnDemand]: 129/132 looper letters, 48 selfloop transitions, 3 changer transitions 0/121 dead transitions. [2025-03-04 10:04:51,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 121 transitions, 397 flow [2025-03-04 10:04:51,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-04 10:04:51,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-04 10:04:51,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 277 transitions. [2025-03-04 10:04:51,043 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6994949494949495 [2025-03-04 10:04:51,043 INFO L175 Difference]: Start difference. First operand has 117 places, 117 transitions, 283 flow. Second operand 3 states and 277 transitions. [2025-03-04 10:04:51,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 121 transitions, 397 flow [2025-03-04 10:04:51,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 121 transitions, 387 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-04 10:04:51,046 INFO L231 Difference]: Finished difference. Result has 118 places, 117 transitions, 288 flow [2025-03-04 10:04:51,047 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=288, PETRI_PLACES=118, PETRI_TRANSITIONS=117} [2025-03-04 10:04:51,047 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 1 predicate places. [2025-03-04 10:04:51,048 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 117 transitions, 288 flow [2025-03-04 10:04:51,048 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:51,048 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:04:51,048 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:04:51,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-04 10:04:51,248 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:51,248 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-04 10:04:51,249 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:04:51,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1908896406, now seen corresponding path program 1 times [2025-03-04 10:04:51,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:04:51,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1301150937] [2025-03-04 10:04:51,250 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:04:51,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:51,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:04:51,252 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:04:51,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-04 10:04:51,319 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-04 10:04:51,470 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-04 10:04:51,470 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:04:51,470 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:04:51,494 INFO L256 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-04 10:04:51,495 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:04:51,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2025-03-04 10:04:51,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:04:51,515 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:04:51,515 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:04:51,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301150937] [2025-03-04 10:04:51,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301150937] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:04:51,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:04:51,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 10:04:51,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247308798] [2025-03-04 10:04:51,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:04:51,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 10:04:51,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:04:51,516 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 10:04:51,516 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 10:04:51,702 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 132 [2025-03-04 10:04:51,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 117 transitions, 288 flow. Second operand has 4 states, 4 states have (on average 70.75) internal successors, (283), 4 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:51,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:04:51,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 132 [2025-03-04 10:04:51,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:04:51,944 INFO L124 PetriNetUnfolderBase]: 121/519 cut-off events. [2025-03-04 10:04:51,944 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2025-03-04 10:04:51,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 845 conditions, 519 events. 121/519 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2535 event pairs, 100 based on Foata normal form. 0/421 useless extension candidates. Maximal degree in co-relation 811. Up to 261 conditions per place. [2025-03-04 10:04:51,946 INFO L140 encePairwiseOnDemand]: 125/132 looper letters, 42 selfloop transitions, 7 changer transitions 0/115 dead transitions. [2025-03-04 10:04:51,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 115 transitions, 382 flow [2025-03-04 10:04:51,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-04 10:04:51,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-04 10:04:51,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 392 transitions. [2025-03-04 10:04:51,948 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.593939393939394 [2025-03-04 10:04:51,948 INFO L175 Difference]: Start difference. First operand has 118 places, 117 transitions, 288 flow. Second operand 5 states and 392 transitions. [2025-03-04 10:04:51,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 115 transitions, 382 flow [2025-03-04 10:04:51,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 115 transitions, 379 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-04 10:04:51,950 INFO L231 Difference]: Finished difference. Result has 119 places, 115 transitions, 295 flow [2025-03-04 10:04:51,950 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=295, PETRI_PLACES=119, PETRI_TRANSITIONS=115} [2025-03-04 10:04:51,951 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 2 predicate places. [2025-03-04 10:04:51,951 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 115 transitions, 295 flow [2025-03-04 10:04:51,951 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.75) internal successors, (283), 4 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:51,951 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:04:51,951 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:04:51,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-04 10:04:52,152 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:52,152 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-04 10:04:52,152 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:04:52,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1908896405, now seen corresponding path program 1 times [2025-03-04 10:04:52,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:04:52,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1250952922] [2025-03-04 10:04:52,153 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:04:52,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:52,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:04:52,155 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:04:52,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-04 10:04:52,220 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-04 10:04:52,392 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-04 10:04:52,392 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:04:52,392 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:04:52,414 INFO L256 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-04 10:04:52,416 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:04:52,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-04 10:04:52,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:04:52,449 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:04:52,449 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:04:52,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250952922] [2025-03-04 10:04:52,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250952922] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:04:52,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:04:52,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 10:04:52,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547479289] [2025-03-04 10:04:52,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:04:52,450 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 10:04:52,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:04:52,450 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 10:04:52,450 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 10:04:52,627 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 132 [2025-03-04 10:04:52,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 115 transitions, 295 flow. Second operand has 4 states, 4 states have (on average 72.5) internal successors, (290), 4 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:52,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:04:52,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 132 [2025-03-04 10:04:52,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:04:52,886 INFO L124 PetriNetUnfolderBase]: 121/515 cut-off events. [2025-03-04 10:04:52,886 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2025-03-04 10:04:52,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 849 conditions, 515 events. 121/515 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2519 event pairs, 100 based on Foata normal form. 4/421 useless extension candidates. Maximal degree in co-relation 810. Up to 263 conditions per place. [2025-03-04 10:04:52,889 INFO L140 encePairwiseOnDemand]: 127/132 looper letters, 45 selfloop transitions, 4 changer transitions 0/113 dead transitions. [2025-03-04 10:04:52,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 113 transitions, 389 flow [2025-03-04 10:04:52,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 10:04:52,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 10:04:52,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 331 transitions. [2025-03-04 10:04:52,893 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6268939393939394 [2025-03-04 10:04:52,893 INFO L175 Difference]: Start difference. First operand has 119 places, 115 transitions, 295 flow. Second operand 4 states and 331 transitions. [2025-03-04 10:04:52,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 113 transitions, 389 flow [2025-03-04 10:04:52,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 113 transitions, 375 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-04 10:04:52,898 INFO L231 Difference]: Finished difference. Result has 116 places, 113 transitions, 285 flow [2025-03-04 10:04:52,898 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=285, PETRI_PLACES=116, PETRI_TRANSITIONS=113} [2025-03-04 10:04:52,898 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, -1 predicate places. [2025-03-04 10:04:52,899 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 113 transitions, 285 flow [2025-03-04 10:04:52,899 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.5) internal successors, (290), 4 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:52,900 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:04:52,900 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:04:52,917 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-04 10:04:53,100 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:53,101 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-04 10:04:53,101 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:04:53,101 INFO L85 PathProgramCache]: Analyzing trace with hash -498387701, now seen corresponding path program 1 times [2025-03-04 10:04:53,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:04:53,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1064124625] [2025-03-04 10:04:53,102 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:04:53,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:53,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:04:53,103 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:04:53,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-04 10:04:53,195 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-04 10:04:53,371 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-04 10:04:53,371 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:04:53,371 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:04:53,396 INFO L256 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-04 10:04:53,398 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:04:53,433 INFO L349 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2025-03-04 10:04:53,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2025-03-04 10:04:53,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:04:53,483 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:04:53,483 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:04:53,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064124625] [2025-03-04 10:04:53,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064124625] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:04:53,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:04:53,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-04 10:04:53,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401031465] [2025-03-04 10:04:53,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:04:53,484 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-04 10:04:53,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:04:53,484 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-04 10:04:53,484 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-04 10:04:53,822 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 132 [2025-03-04 10:04:53,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 113 transitions, 285 flow. Second operand has 6 states, 6 states have (on average 70.5) internal successors, (423), 6 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:53,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:04:53,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 132 [2025-03-04 10:04:53,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:04:54,096 INFO L124 PetriNetUnfolderBase]: 120/468 cut-off events. [2025-03-04 10:04:54,096 INFO L125 PetriNetUnfolderBase]: For 17/18 co-relation queries the response was YES. [2025-03-04 10:04:54,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 803 conditions, 468 events. 120/468 cut-off events. For 17/18 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2252 event pairs, 61 based on Foata normal form. 3/388 useless extension candidates. Maximal degree in co-relation 768. Up to 177 conditions per place. [2025-03-04 10:04:54,098 INFO L140 encePairwiseOnDemand]: 126/132 looper letters, 67 selfloop transitions, 5 changer transitions 0/133 dead transitions. [2025-03-04 10:04:54,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 133 transitions, 469 flow [2025-03-04 10:04:54,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 10:04:54,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 10:04:54,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 346 transitions. [2025-03-04 10:04:54,100 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6553030303030303 [2025-03-04 10:04:54,100 INFO L175 Difference]: Start difference. First operand has 116 places, 113 transitions, 285 flow. Second operand 4 states and 346 transitions. [2025-03-04 10:04:54,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 133 transitions, 469 flow [2025-03-04 10:04:54,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 133 transitions, 461 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-04 10:04:54,102 INFO L231 Difference]: Finished difference. Result has 114 places, 111 transitions, 283 flow [2025-03-04 10:04:54,102 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=283, PETRI_PLACES=114, PETRI_TRANSITIONS=111} [2025-03-04 10:04:54,103 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, -3 predicate places. [2025-03-04 10:04:54,103 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 111 transitions, 283 flow [2025-03-04 10:04:54,103 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 70.5) internal successors, (423), 6 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:54,103 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:04:54,103 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:04:54,117 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-04 10:04:54,303 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:54,304 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-04 10:04:54,304 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:04:54,304 INFO L85 PathProgramCache]: Analyzing trace with hash -498387700, now seen corresponding path program 1 times [2025-03-04 10:04:54,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:04:54,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [875845910] [2025-03-04 10:04:54,304 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:04:54,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:54,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:04:54,306 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:04:54,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-04 10:04:54,371 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-04 10:04:54,531 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-04 10:04:54,531 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:04:54,531 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:04:54,552 INFO L256 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-04 10:04:54,554 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:04:54,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-04 10:04:54,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-03-04 10:04:54,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:04:54,666 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:04:54,666 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:04:54,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875845910] [2025-03-04 10:04:54,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875845910] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:04:54,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:04:54,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 10:04:54,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722092717] [2025-03-04 10:04:54,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:04:54,666 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-04 10:04:54,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:04:54,667 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-04 10:04:54,667 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-04 10:04:54,896 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 132 [2025-03-04 10:04:54,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 111 transitions, 283 flow. Second operand has 5 states, 5 states have (on average 72.4) internal successors, (362), 5 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:54,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:04:54,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 132 [2025-03-04 10:04:54,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:04:55,153 INFO L124 PetriNetUnfolderBase]: 123/542 cut-off events. [2025-03-04 10:04:55,153 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2025-03-04 10:04:55,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 916 conditions, 542 events. 123/542 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2768 event pairs, 101 based on Foata normal form. 2/436 useless extension candidates. Maximal degree in co-relation 825. Up to 270 conditions per place. [2025-03-04 10:04:55,155 INFO L140 encePairwiseOnDemand]: 126/132 looper letters, 52 selfloop transitions, 5 changer transitions 0/118 dead transitions. [2025-03-04 10:04:55,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 118 transitions, 427 flow [2025-03-04 10:04:55,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 10:04:55,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 10:04:55,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 340 transitions. [2025-03-04 10:04:55,156 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6439393939393939 [2025-03-04 10:04:55,156 INFO L175 Difference]: Start difference. First operand has 114 places, 111 transitions, 283 flow. Second operand 4 states and 340 transitions. [2025-03-04 10:04:55,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 118 transitions, 427 flow [2025-03-04 10:04:55,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 118 transitions, 411 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-04 10:04:55,159 INFO L231 Difference]: Finished difference. Result has 116 places, 115 transitions, 319 flow [2025-03-04 10:04:55,159 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=319, PETRI_PLACES=116, PETRI_TRANSITIONS=115} [2025-03-04 10:04:55,160 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, -1 predicate places. [2025-03-04 10:04:55,160 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 115 transitions, 319 flow [2025-03-04 10:04:55,160 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 72.4) internal successors, (362), 5 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:55,160 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:04:55,160 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:04:55,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-04 10:04:55,360 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:55,360 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-04 10:04:55,361 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:04:55,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1729851260, now seen corresponding path program 1 times [2025-03-04 10:04:55,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:04:55,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1362432486] [2025-03-04 10:04:55,361 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:04:55,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:55,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:04:55,363 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:04:55,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-04 10:04:55,429 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-04 10:04:55,604 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-04 10:04:55,604 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:04:55,604 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:04:55,626 INFO L256 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-03-04 10:04:55,628 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:04:55,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-04 10:04:55,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2025-03-04 10:04:55,766 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-03-04 10:04:55,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2025-03-04 10:04:55,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-04 10:04:55,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-04 10:04:55,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-04 10:04:55,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:04:55,875 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:04:55,875 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:04:55,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362432486] [2025-03-04 10:04:55,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362432486] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:04:55,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:04:55,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-04 10:04:55,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336634733] [2025-03-04 10:04:55,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:04:55,875 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-04 10:04:55,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:04:55,876 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-04 10:04:55,876 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2025-03-04 10:04:56,972 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 132 [2025-03-04 10:04:56,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 115 transitions, 319 flow. Second operand has 10 states, 10 states have (on average 59.0) internal successors, (590), 10 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:56,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:04:56,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 132 [2025-03-04 10:04:56,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:04:57,518 INFO L124 PetriNetUnfolderBase]: 123/541 cut-off events. [2025-03-04 10:04:57,518 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2025-03-04 10:04:57,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 925 conditions, 541 events. 123/541 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2756 event pairs, 101 based on Foata normal form. 0/448 useless extension candidates. Maximal degree in co-relation 833. Up to 279 conditions per place. [2025-03-04 10:04:57,521 INFO L140 encePairwiseOnDemand]: 120/132 looper letters, 65 selfloop transitions, 11 changer transitions 0/131 dead transitions. [2025-03-04 10:04:57,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 131 transitions, 509 flow [2025-03-04 10:04:57,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-04 10:04:57,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-04 10:04:57,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 714 transitions. [2025-03-04 10:04:57,523 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49173553719008267 [2025-03-04 10:04:57,523 INFO L175 Difference]: Start difference. First operand has 116 places, 115 transitions, 319 flow. Second operand 11 states and 714 transitions. [2025-03-04 10:04:57,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 131 transitions, 509 flow [2025-03-04 10:04:57,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 131 transitions, 507 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-04 10:04:57,526 INFO L231 Difference]: Finished difference. Result has 130 places, 120 transitions, 375 flow [2025-03-04 10:04:57,526 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=375, PETRI_PLACES=130, PETRI_TRANSITIONS=120} [2025-03-04 10:04:57,527 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 13 predicate places. [2025-03-04 10:04:57,527 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 120 transitions, 375 flow [2025-03-04 10:04:57,527 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 59.0) internal successors, (590), 10 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:57,527 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:04:57,527 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:04:57,542 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-04 10:04:57,727 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:57,728 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-04 10:04:57,728 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:04:57,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1729851261, now seen corresponding path program 1 times [2025-03-04 10:04:57,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:04:57,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1612560765] [2025-03-04 10:04:57,728 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:04:57,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:57,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:04:57,730 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:04:57,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-04 10:04:57,796 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-04 10:04:57,988 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-04 10:04:57,988 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:04:57,988 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:04:58,013 INFO L256 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-03-04 10:04:58,015 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:04:58,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-04 10:04:58,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-04 10:04:58,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2025-03-04 10:04:58,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2025-03-04 10:04:58,170 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-03-04 10:04:58,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2025-03-04 10:04:58,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-03-04 10:04:58,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-04 10:04:58,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-04 10:04:58,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-04 10:04:58,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-04 10:04:58,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-04 10:04:58,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-04 10:04:58,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:04:58,332 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:04:58,332 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:04:58,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612560765] [2025-03-04 10:04:58,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612560765] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:04:58,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:04:58,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-04 10:04:58,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686478366] [2025-03-04 10:04:58,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:04:58,333 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-04 10:04:58,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:04:58,333 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-04 10:04:58,333 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-03-04 10:04:59,302 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 132 [2025-03-04 10:04:59,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 120 transitions, 375 flow. Second operand has 10 states, 10 states have (on average 57.0) internal successors, (570), 10 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:59,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:04:59,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 132 [2025-03-04 10:04:59,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:04:59,899 INFO L124 PetriNetUnfolderBase]: 123/540 cut-off events. [2025-03-04 10:04:59,899 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2025-03-04 10:04:59,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 962 conditions, 540 events. 123/540 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2743 event pairs, 101 based on Foata normal form. 1/451 useless extension candidates. Maximal degree in co-relation 882. Up to 283 conditions per place. [2025-03-04 10:04:59,901 INFO L140 encePairwiseOnDemand]: 121/132 looper letters, 68 selfloop transitions, 10 changer transitions 0/131 dead transitions. [2025-03-04 10:04:59,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 131 transitions, 561 flow [2025-03-04 10:04:59,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-04 10:04:59,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-04 10:04:59,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 638 transitions. [2025-03-04 10:04:59,903 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2025-03-04 10:04:59,903 INFO L175 Difference]: Start difference. First operand has 130 places, 120 transitions, 375 flow. Second operand 10 states and 638 transitions. [2025-03-04 10:04:59,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 131 transitions, 561 flow [2025-03-04 10:04:59,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 131 transitions, 557 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-04 10:04:59,905 INFO L231 Difference]: Finished difference. Result has 138 places, 120 transitions, 395 flow [2025-03-04 10:04:59,905 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=395, PETRI_PLACES=138, PETRI_TRANSITIONS=120} [2025-03-04 10:04:59,905 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 21 predicate places. [2025-03-04 10:04:59,906 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 120 transitions, 395 flow [2025-03-04 10:04:59,906 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 57.0) internal successors, (570), 10 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:59,906 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:04:59,906 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:04:59,919 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-04 10:05:00,106 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:05:00,107 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-04 10:05:00,107 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:05:00,107 INFO L85 PathProgramCache]: Analyzing trace with hash 2085782235, now seen corresponding path program 1 times [2025-03-04 10:05:00,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:05:00,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1964982824] [2025-03-04 10:05:00,107 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:05:00,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:05:00,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:05:00,109 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:05:00,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-04 10:05:00,178 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-04 10:05:00,336 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-04 10:05:00,336 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:05:00,336 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:05:00,362 INFO L256 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-04 10:05:00,364 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:05:00,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-04 10:05:00,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:05:00,398 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:05:00,398 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:05:00,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964982824] [2025-03-04 10:05:00,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964982824] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:05:00,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:05:00,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 10:05:00,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870744412] [2025-03-04 10:05:00,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:05:00,398 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 10:05:00,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:05:00,399 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 10:05:00,399 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 10:05:00,526 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 132 [2025-03-04 10:05:00,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 120 transitions, 395 flow. Second operand has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:05:00,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:05:00,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 132 [2025-03-04 10:05:00,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:05:00,717 INFO L124 PetriNetUnfolderBase]: 122/531 cut-off events. [2025-03-04 10:05:00,718 INFO L125 PetriNetUnfolderBase]: For 67/67 co-relation queries the response was YES. [2025-03-04 10:05:00,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 936 conditions, 531 events. 122/531 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2716 event pairs, 100 based on Foata normal form. 8/446 useless extension candidates. Maximal degree in co-relation 856. Up to 260 conditions per place. [2025-03-04 10:05:00,720 INFO L140 encePairwiseOnDemand]: 127/132 looper letters, 45 selfloop transitions, 9 changer transitions 0/118 dead transitions. [2025-03-04 10:05:00,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 118 transitions, 499 flow [2025-03-04 10:05:00,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 10:05:00,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 10:05:00,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 337 transitions. [2025-03-04 10:05:00,722 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6382575757575758 [2025-03-04 10:05:00,722 INFO L175 Difference]: Start difference. First operand has 138 places, 120 transitions, 395 flow. Second operand 4 states and 337 transitions. [2025-03-04 10:05:00,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 118 transitions, 499 flow [2025-03-04 10:05:00,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 118 transitions, 479 flow, removed 0 selfloop flow, removed 9 redundant places. [2025-03-04 10:05:00,724 INFO L231 Difference]: Finished difference. Result has 130 places, 118 transitions, 389 flow [2025-03-04 10:05:00,724 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=389, PETRI_PLACES=130, PETRI_TRANSITIONS=118} [2025-03-04 10:05:00,726 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 13 predicate places. [2025-03-04 10:05:00,727 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 118 transitions, 389 flow [2025-03-04 10:05:00,727 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:05:00,727 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:05:00,727 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:05:00,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-04 10:05:00,927 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:05:00,928 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-04 10:05:00,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:05:00,928 INFO L85 PathProgramCache]: Analyzing trace with hash 2085782234, now seen corresponding path program 1 times [2025-03-04 10:05:00,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:05:00,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [658263516] [2025-03-04 10:05:00,928 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:05:00,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:05:00,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:05:00,930 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:05:00,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-04 10:05:01,010 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-04 10:05:01,158 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-04 10:05:01,159 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:05:01,159 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:05:01,183 INFO L256 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-04 10:05:01,184 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:05:01,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:05:01,200 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:05:01,200 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:05:01,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658263516] [2025-03-04 10:05:01,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658263516] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:05:01,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:05:01,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-04 10:05:01,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987721810] [2025-03-04 10:05:01,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:05:01,201 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-04 10:05:01,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:05:01,201 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-04 10:05:01,201 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-04 10:05:01,373 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 132 [2025-03-04 10:05:01,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 118 transitions, 389 flow. Second operand has 5 states, 5 states have (on average 71.0) internal successors, (355), 5 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:05:01,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:05:01,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 132 [2025-03-04 10:05:01,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:05:01,604 INFO L124 PetriNetUnfolderBase]: 122/523 cut-off events. [2025-03-04 10:05:01,604 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2025-03-04 10:05:01,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 944 conditions, 523 events. 122/523 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2649 event pairs, 100 based on Foata normal form. 0/438 useless extension candidates. Maximal degree in co-relation 865. Up to 262 conditions per place. [2025-03-04 10:05:01,606 INFO L140 encePairwiseOnDemand]: 126/132 looper letters, 48 selfloop transitions, 11 changer transitions 0/116 dead transitions. [2025-03-04 10:05:01,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 116 transitions, 503 flow [2025-03-04 10:05:01,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-04 10:05:01,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-04 10:05:01,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 394 transitions. [2025-03-04 10:05:01,607 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5969696969696969 [2025-03-04 10:05:01,607 INFO L175 Difference]: Start difference. First operand has 130 places, 118 transitions, 389 flow. Second operand 5 states and 394 transitions. [2025-03-04 10:05:01,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 116 transitions, 503 flow [2025-03-04 10:05:01,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 116 transitions, 485 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-04 10:05:01,609 INFO L231 Difference]: Finished difference. Result has 129 places, 116 transitions, 389 flow [2025-03-04 10:05:01,609 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=389, PETRI_PLACES=129, PETRI_TRANSITIONS=116} [2025-03-04 10:05:01,610 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 12 predicate places. [2025-03-04 10:05:01,610 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 116 transitions, 389 flow [2025-03-04 10:05:01,610 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 71.0) internal successors, (355), 5 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:05:01,610 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:05:01,610 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:05:01,622 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-04 10:05:01,810 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:05:01,811 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-04 10:05:01,811 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:05:01,811 INFO L85 PathProgramCache]: Analyzing trace with hash -644466278, now seen corresponding path program 1 times [2025-03-04 10:05:01,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:05:01,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [323245162] [2025-03-04 10:05:01,811 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:05:01,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:05:01,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:05:01,813 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:05:01,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-04 10:05:01,891 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-04 10:05:02,036 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-04 10:05:02,036 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:05:02,036 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:05:02,060 INFO L256 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-04 10:05:02,061 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:05:02,074 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:05:02,074 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 10:05:02,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:05:02,094 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:05:02,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323245162] [2025-03-04 10:05:02,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323245162] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 10:05:02,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-04 10:05:02,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2025-03-04 10:05:02,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023188949] [2025-03-04 10:05:02,094 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-04 10:05:02,094 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-04 10:05:02,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:05:02,095 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-04 10:05:02,095 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-03-04 10:05:02,095 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 132 [2025-03-04 10:05:02,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 116 transitions, 389 flow. Second operand has 6 states, 6 states have (on average 78.83333333333333) internal successors, (473), 6 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:05:02,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:05:02,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 132 [2025-03-04 10:05:02,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:05:02,330 INFO L124 PetriNetUnfolderBase]: 122/573 cut-off events. [2025-03-04 10:05:02,330 INFO L125 PetriNetUnfolderBase]: For 151/151 co-relation queries the response was YES. [2025-03-04 10:05:02,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1072 conditions, 573 events. 122/573 cut-off events. For 151/151 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2780 event pairs, 100 based on Foata normal form. 6/490 useless extension candidates. Maximal degree in co-relation 988. Up to 256 conditions per place. [2025-03-04 10:05:02,333 INFO L140 encePairwiseOnDemand]: 128/132 looper letters, 62 selfloop transitions, 11 changer transitions 0/135 dead transitions. [2025-03-04 10:05:02,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 135 transitions, 663 flow [2025-03-04 10:05:02,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-04 10:05:02,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-04 10:05:02,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 518 transitions. [2025-03-04 10:05:02,335 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6540404040404041 [2025-03-04 10:05:02,335 INFO L175 Difference]: Start difference. First operand has 129 places, 116 transitions, 389 flow. Second operand 6 states and 518 transitions. [2025-03-04 10:05:02,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 135 transitions, 663 flow [2025-03-04 10:05:02,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 135 transitions, 609 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-04 10:05:02,338 INFO L231 Difference]: Finished difference. Result has 134 places, 121 transitions, 453 flow [2025-03-04 10:05:02,338 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=453, PETRI_PLACES=134, PETRI_TRANSITIONS=121} [2025-03-04 10:05:02,339 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 17 predicate places. [2025-03-04 10:05:02,339 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 121 transitions, 453 flow [2025-03-04 10:05:02,339 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 78.83333333333333) internal successors, (473), 6 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:05:02,339 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:05:02,339 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:05:02,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-04 10:05:02,540 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:05:02,540 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-04 10:05:02,540 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:05:02,540 INFO L85 PathProgramCache]: Analyzing trace with hash -847825546, now seen corresponding path program 1 times [2025-03-04 10:05:02,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:05:02,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1016123347] [2025-03-04 10:05:02,541 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:05:02,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:05:02,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:05:02,542 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:05:02,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-04 10:05:02,626 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-04 10:05:02,828 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-04 10:05:02,828 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:05:02,828 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:05:02,855 INFO L256 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-03-04 10:05:02,863 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:05:02,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-04 10:05:03,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-03-04 10:05:03,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2025-03-04 10:05:03,081 INFO L349 Elim1Store]: treesize reduction 31, result has 46.6 percent of original size [2025-03-04 10:05:03,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 31 [2025-03-04 10:05:03,129 INFO L349 Elim1Store]: treesize reduction 31, result has 36.7 percent of original size [2025-03-04 10:05:03,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2025-03-04 10:05:03,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2025-03-04 10:05:03,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 29 [2025-03-04 10:05:03,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 29 [2025-03-04 10:05:03,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2025-03-04 10:05:03,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 19 [2025-03-04 10:05:03,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-04 10:05:03,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2025-03-04 10:05:03,341 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:05:03,341 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 10:05:03,460 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd |c_~#c~0.offset| (_ bv4 32) (bvmul (_ bv12 32) |c_ULTIMATE.start_main_~i~0#1|)))) (and (forall ((v_ArrVal_579 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_579) |c_~#c~0.base|) .cse1))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (forall ((v_ArrVal_578 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_579 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_579) |c_~#c~0.base|) .cse1)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_578) |c_~#c~0.base|) .cse1)))))) is different from false [2025-03-04 10:05:03,516 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd |c_~#c~0.offset| (_ bv4 32) (bvmul (_ bv12 32) |c_ULTIMATE.start_main_~i~0#1|)))) (and (forall ((v_ArrVal_579 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_579) |c_~#c~0.base|) .cse1))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (forall ((v_ArrVal_578 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_579 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_579) |c_~#c~0.base|) .cse1)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_578) |c_~#c~0.base|) .cse1)))))) is different from false [2025-03-04 10:05:03,708 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 10:05:03,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 40 [2025-03-04 10:05:03,731 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 10:05:03,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 58 [2025-03-04 10:05:03,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 11 [2025-03-04 10:05:03,799 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 10:05:03,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 51 [2025-03-04 10:05:03,807 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 10:05:03,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 43 [2025-03-04 10:05:03,811 INFO L173 IndexEqualityManager]: detected equality via solver [2025-03-04 10:05:03,824 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 10:05:03,824 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 40 treesize of output 43 [2025-03-04 10:05:03,828 INFO L173 IndexEqualityManager]: detected equality via solver [2025-03-04 10:05:03,842 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 10:05:03,842 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 28 treesize of output 31 [2025-03-04 10:05:05,007 INFO L349 Elim1Store]: treesize reduction 10, result has 83.6 percent of original size [2025-03-04 10:05:05,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 91 [2025-03-04 10:05:05,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2025-03-04 10:05:05,326 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:05:05,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016123347] [2025-03-04 10:05:05,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016123347] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 10:05:05,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-04 10:05:05,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2025-03-04 10:05:05,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361811298] [2025-03-04 10:05:05,326 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-04 10:05:05,327 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-04 10:05:05,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:05:05,327 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-04 10:05:05,327 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=329, Unknown=2, NotChecked=74, Total=462 [2025-03-04 10:05:06,372 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 132 [2025-03-04 10:05:06,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 121 transitions, 453 flow. Second operand has 22 states, 22 states have (on average 20.545454545454547) internal successors, (452), 22 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) [2025-03-04 10:05:06,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:05:06,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 132 [2025-03-04 10:05:06,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:05:08,991 INFO L124 PetriNetUnfolderBase]: 465/1268 cut-off events. [2025-03-04 10:05:08,991 INFO L125 PetriNetUnfolderBase]: For 120/120 co-relation queries the response was YES. [2025-03-04 10:05:08,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2528 conditions, 1268 events. 465/1268 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7478 event pairs, 422 based on Foata normal form. 6/842 useless extension candidates. Maximal degree in co-relation 2448. Up to 955 conditions per place. [2025-03-04 10:05:08,997 INFO L140 encePairwiseOnDemand]: 122/132 looper letters, 85 selfloop transitions, 28 changer transitions 0/132 dead transitions. [2025-03-04 10:05:08,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 132 transitions, 719 flow [2025-03-04 10:05:08,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-04 10:05:08,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-03-04 10:05:08,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 363 transitions. [2025-03-04 10:05:08,999 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.19642857142857142 [2025-03-04 10:05:08,999 INFO L175 Difference]: Start difference. First operand has 134 places, 121 transitions, 453 flow. Second operand 14 states and 363 transitions. [2025-03-04 10:05:09,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 132 transitions, 719 flow [2025-03-04 10:05:09,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 132 transitions, 703 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-03-04 10:05:09,002 INFO L231 Difference]: Finished difference. Result has 149 places, 128 transitions, 535 flow [2025-03-04 10:05:09,003 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=535, PETRI_PLACES=149, PETRI_TRANSITIONS=128} [2025-03-04 10:05:09,004 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 32 predicate places. [2025-03-04 10:05:09,004 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 128 transitions, 535 flow [2025-03-04 10:05:09,004 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 20.545454545454547) internal successors, (452), 22 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) [2025-03-04 10:05:09,004 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:05:09,004 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:05:09,021 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-04 10:05:09,204 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:05:09,205 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-04 10:05:09,205 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:05:09,205 INFO L85 PathProgramCache]: Analyzing trace with hash -847825547, now seen corresponding path program 1 times [2025-03-04 10:05:09,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:05:09,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1971695488] [2025-03-04 10:05:09,206 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:05:09,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:05:09,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:05:09,207 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:05:09,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-04 10:05:09,302 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-04 10:05:09,503 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-04 10:05:09,503 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:05:09,503 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:05:09,531 INFO L256 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-04 10:05:09,533 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:05:09,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2025-03-04 10:05:09,691 INFO L349 Elim1Store]: treesize reduction 94, result has 30.4 percent of original size [2025-03-04 10:05:09,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 54 [2025-03-04 10:05:09,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 31 [2025-03-04 10:05:09,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 31 [2025-03-04 10:05:09,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 21 [2025-03-04 10:05:09,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-03-04 10:05:09,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:05:09,854 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 10:05:09,893 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_681 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_681) |c_~#c~0.base|) (bvadd |c_~#c~0.offset| (_ bv4 32) (bvmul (_ bv12 32) |c_ULTIMATE.start_main_~i~0#1|))))))) is different from false [2025-03-04 10:05:10,032 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 10:05:10,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2025-03-04 10:05:10,044 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 10:05:10,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 57 [2025-03-04 10:05:10,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 14 [2025-03-04 10:05:11,172 INFO L349 Elim1Store]: treesize reduction 7, result has 96.7 percent of original size [2025-03-04 10:05:11,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 103 treesize of output 290 [2025-03-04 10:05:11,383 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2025-03-04 10:05:11,383 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:05:11,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971695488] [2025-03-04 10:05:11,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971695488] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 10:05:11,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-04 10:05:11,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2025-03-04 10:05:11,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416667707] [2025-03-04 10:05:11,383 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-04 10:05:11,384 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-04 10:05:11,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:05:11,384 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-04 10:05:11,385 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=247, Unknown=13, NotChecked=32, Total=342 [2025-03-04 10:05:11,622 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 132 [2025-03-04 10:05:11,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 128 transitions, 535 flow. Second operand has 19 states, 19 states have (on average 30.68421052631579) internal successors, (583), 19 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:05:11,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:05:11,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 132 [2025-03-04 10:05:11,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:05:13,433 INFO L124 PetriNetUnfolderBase]: 329/1024 cut-off events. [2025-03-04 10:05:13,433 INFO L125 PetriNetUnfolderBase]: For 148/148 co-relation queries the response was YES. [2025-03-04 10:05:13,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2069 conditions, 1024 events. 329/1024 cut-off events. For 148/148 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5910 event pairs, 292 based on Foata normal form. 6/801 useless extension candidates. Maximal degree in co-relation 1976. Up to 679 conditions per place. [2025-03-04 10:05:13,437 INFO L140 encePairwiseOnDemand]: 124/132 looper letters, 76 selfloop transitions, 26 changer transitions 0/131 dead transitions. [2025-03-04 10:05:13,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 131 transitions, 749 flow [2025-03-04 10:05:13,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-04 10:05:13,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-04 10:05:13,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 434 transitions. [2025-03-04 10:05:13,439 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.273989898989899 [2025-03-04 10:05:13,439 INFO L175 Difference]: Start difference. First operand has 149 places, 128 transitions, 535 flow. Second operand 12 states and 434 transitions. [2025-03-04 10:05:13,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 131 transitions, 749 flow [2025-03-04 10:05:13,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 131 transitions, 712 flow, removed 10 selfloop flow, removed 4 redundant places. [2025-03-04 10:05:13,442 INFO L231 Difference]: Finished difference. Result has 157 places, 128 transitions, 559 flow [2025-03-04 10:05:13,443 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=559, PETRI_PLACES=157, PETRI_TRANSITIONS=128} [2025-03-04 10:05:13,443 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 40 predicate places. [2025-03-04 10:05:13,443 INFO L471 AbstractCegarLoop]: Abstraction has has 157 places, 128 transitions, 559 flow [2025-03-04 10:05:13,443 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 30.68421052631579) internal successors, (583), 19 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:05:13,443 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:05:13,443 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:05:13,460 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-04 10:05:13,644 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:05:13,644 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-04 10:05:13,644 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:05:13,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1370748179, now seen corresponding path program 1 times [2025-03-04 10:05:13,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:05:13,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [188607902] [2025-03-04 10:05:13,645 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:05:13,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:05:13,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:05:13,647 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:05:13,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-04 10:05:13,760 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-03-04 10:05:14,021 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-03-04 10:05:14,021 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:05:14,021 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:05:14,055 INFO L256 TraceCheckSpWp]: Trace formula consists of 899 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-04 10:05:14,056 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:05:14,094 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2025-03-04 10:05:14,094 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 10:05:14,144 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2025-03-04 10:05:14,144 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:05:14,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188607902] [2025-03-04 10:05:14,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188607902] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 10:05:14,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-04 10:05:14,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2025-03-04 10:05:14,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273078667] [2025-03-04 10:05:14,144 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-04 10:05:14,144 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-04 10:05:14,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:05:14,144 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-04 10:05:14,145 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-03-04 10:05:14,145 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 132 [2025-03-04 10:05:14,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 128 transitions, 559 flow. Second operand has 6 states, 6 states have (on average 79.33333333333333) internal successors, (476), 6 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:05:14,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:05:14,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 132 [2025-03-04 10:05:14,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:05:14,429 INFO L124 PetriNetUnfolderBase]: 124/668 cut-off events. [2025-03-04 10:05:14,429 INFO L125 PetriNetUnfolderBase]: For 396/396 co-relation queries the response was YES. [2025-03-04 10:05:14,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1514 conditions, 668 events. 124/668 cut-off events. For 396/396 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2421 event pairs, 100 based on Foata normal form. 0/586 useless extension candidates. Maximal degree in co-relation 1419. Up to 250 conditions per place. [2025-03-04 10:05:14,431 INFO L140 encePairwiseOnDemand]: 128/132 looper letters, 94 selfloop transitions, 6 changer transitions 0/165 dead transitions. [2025-03-04 10:05:14,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 165 transitions, 1083 flow [2025-03-04 10:05:14,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-04 10:05:14,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-04 10:05:14,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 527 transitions. [2025-03-04 10:05:14,434 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6654040404040404 [2025-03-04 10:05:14,434 INFO L175 Difference]: Start difference. First operand has 157 places, 128 transitions, 559 flow. Second operand 6 states and 527 transitions. [2025-03-04 10:05:14,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 165 transitions, 1083 flow [2025-03-04 10:05:14,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 165 transitions, 967 flow, removed 0 selfloop flow, removed 11 redundant places. [2025-03-04 10:05:14,438 INFO L231 Difference]: Finished difference. Result has 155 places, 131 transitions, 566 flow [2025-03-04 10:05:14,438 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=507, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=566, PETRI_PLACES=155, PETRI_TRANSITIONS=131} [2025-03-04 10:05:14,439 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 38 predicate places. [2025-03-04 10:05:14,439 INFO L471 AbstractCegarLoop]: Abstraction has has 155 places, 131 transitions, 566 flow [2025-03-04 10:05:14,439 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 79.33333333333333) internal successors, (476), 6 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:05:14,439 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:05:14,439 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1] [2025-03-04 10:05:14,458 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-04 10:05:14,640 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:05:14,640 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-04 10:05:14,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:05:14,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1370748083, now seen corresponding path program 2 times [2025-03-04 10:05:14,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:05:14,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2109980364] [2025-03-04 10:05:14,641 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 10:05:14,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:05:14,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:05:14,643 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:05:14,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-04 10:05:14,763 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-03-04 10:05:15,042 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-03-04 10:05:15,042 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 10:05:15,042 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:05:15,074 INFO L256 TraceCheckSpWp]: Trace formula consists of 900 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-04 10:05:15,076 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:05:15,119 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:05:15,120 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 10:05:15,209 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:05:15,209 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:05:15,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109980364] [2025-03-04 10:05:15,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109980364] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 10:05:15,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-04 10:05:15,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2025-03-04 10:05:15,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757450421] [2025-03-04 10:05:15,209 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-04 10:05:15,210 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-04 10:05:15,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:05:15,210 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-04 10:05:15,210 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2025-03-04 10:05:15,210 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 132 [2025-03-04 10:05:15,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 131 transitions, 566 flow. Second operand has 12 states, 12 states have (on average 79.91666666666667) internal successors, (959), 12 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:05:15,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:05:15,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 132 [2025-03-04 10:05:15,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:05:15,906 INFO L124 PetriNetUnfolderBase]: 124/920 cut-off events. [2025-03-04 10:05:15,906 INFO L125 PetriNetUnfolderBase]: For 845/845 co-relation queries the response was YES. [2025-03-04 10:05:15,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2246 conditions, 920 events. 124/920 cut-off events. For 845/845 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2491 event pairs, 100 based on Foata normal form. 24/863 useless extension candidates. Maximal degree in co-relation 2152. Up to 263 conditions per place. [2025-03-04 10:05:15,909 INFO L140 encePairwiseOnDemand]: 128/132 looper letters, 95 selfloop transitions, 23 changer transitions 0/183 dead transitions. [2025-03-04 10:05:15,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 183 transitions, 1182 flow [2025-03-04 10:05:15,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-04 10:05:15,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-04 10:05:15,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1007 transitions. [2025-03-04 10:05:15,912 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6357323232323232 [2025-03-04 10:05:15,912 INFO L175 Difference]: Start difference. First operand has 155 places, 131 transitions, 566 flow. Second operand 12 states and 1007 transitions. [2025-03-04 10:05:15,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 183 transitions, 1182 flow [2025-03-04 10:05:15,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 183 transitions, 1180 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-04 10:05:15,916 INFO L231 Difference]: Finished difference. Result has 172 places, 144 transitions, 841 flow [2025-03-04 10:05:15,916 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=564, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=841, PETRI_PLACES=172, PETRI_TRANSITIONS=144} [2025-03-04 10:05:15,917 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 55 predicate places. [2025-03-04 10:05:15,917 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 144 transitions, 841 flow [2025-03-04 10:05:15,917 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 79.91666666666667) internal successors, (959), 12 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:05:15,917 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:05:15,917 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1] [2025-03-04 10:05:15,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-04 10:05:16,118 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:05:16,118 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-04 10:05:16,118 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:05:16,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1474109357, now seen corresponding path program 3 times [2025-03-04 10:05:16,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:05:16,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1273111680] [2025-03-04 10:05:16,119 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 10:05:16,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:05:16,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:05:16,121 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:05:16,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-04 10:05:16,298 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 97 statements into 12 equivalence classes.