./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/09-regions_21-arrayloop2_nr.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/09-regions_21-arrayloop2_nr.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 52746884466210ec366bc04a3a6cb03f413619353c73143d79c1024e676e598e --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-04 10:00:54,352 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-04 10:00:54,407 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-04 10:00:54,411 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-04 10:00:54,413 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-04 10:00:54,434 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-04 10:00:54,435 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-04 10:00:54,435 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-04 10:00:54,435 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-04 10:00:54,435 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-04 10:00:54,436 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-04 10:00:54,436 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-04 10:00:54,436 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-04 10:00:54,436 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-04 10:00:54,436 INFO L153 SettingsManager]: * Use SBE=true [2025-03-04 10:00:54,436 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-04 10:00:54,436 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-04 10:00:54,436 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-04 10:00:54,436 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-04 10:00:54,437 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-04 10:00:54,437 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-04 10:00:54,437 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-04 10:00:54,437 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-04 10:00:54,437 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-04 10:00:54,437 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-04 10:00:54,437 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-04 10:00:54,437 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-04 10:00:54,437 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-04 10:00:54,437 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-04 10:00:54,437 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-04 10:00:54,437 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-04 10:00:54,437 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-04 10:00:54,437 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-04 10:00:54,437 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 10:00:54,437 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-04 10:00:54,437 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-04 10:00:54,437 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-04 10:00:54,437 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-04 10:00:54,437 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-04 10:00:54,438 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-04 10:00:54,438 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-04 10:00:54,438 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-04 10:00:54,438 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 -> 52746884466210ec366bc04a3a6cb03f413619353c73143d79c1024e676e598e [2025-03-04 10:00:54,655 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-04 10:00:54,665 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-04 10:00:54,666 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-04 10:00:54,668 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-04 10:00:54,668 INFO L274 PluginConnector]: CDTParser initialized [2025-03-04 10:00:54,669 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/09-regions_21-arrayloop2_nr.i [2025-03-04 10:00:55,757 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85ed39113/1f1f5acdbf304620aca87ee631a05d4c/FLAGa506b5844 [2025-03-04 10:00:56,056 INFO L384 CDTParser]: Found 1 translation units. [2025-03-04 10:00:56,056 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_21-arrayloop2_nr.i [2025-03-04 10:00:56,079 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85ed39113/1f1f5acdbf304620aca87ee631a05d4c/FLAGa506b5844 [2025-03-04 10:00:56,094 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85ed39113/1f1f5acdbf304620aca87ee631a05d4c [2025-03-04 10:00:56,096 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-04 10:00:56,098 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-04 10:00:56,099 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-04 10:00:56,099 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-04 10:00:56,102 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-04 10:00:56,103 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 10:00:56" (1/1) ... [2025-03-04 10:00:56,103 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15d3ae21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:00:56, skipping insertion in model container [2025-03-04 10:00:56,105 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 10:00:56" (1/1) ... [2025-03-04 10:00:56,135 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-04 10:00:56,410 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:00:56,410 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:00:56,410 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:00:56,410 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:00:56,429 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 10:00:56,463 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 10:00:56,463 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2a459ce3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:00:56, skipping insertion in model container [2025-03-04 10:00:56,464 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-04 10:00:56,464 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2025-03-04 10:00:56,468 INFO L158 Benchmark]: Toolchain (without parser) took 367.28ms. Allocated memory is still 142.6MB. Free memory was 111.3MB in the beginning and 94.8MB in the end (delta: 16.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-03-04 10:00:56,468 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 201.3MB. Free memory is still 124.2MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-04 10:00:56,468 INFO L158 Benchmark]: CACSL2BoogieTranslator took 364.79ms. Allocated memory is still 142.6MB. Free memory was 110.8MB in the beginning and 94.8MB in the end (delta: 16.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-03-04 10:00:56,469 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 201.3MB. Free memory is still 124.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 364.79ms. Allocated memory is still 142.6MB. Free memory was 110.8MB in the beginning and 94.8MB in the end (delta: 16.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1031]: 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/09-regions_21-arrayloop2_nr.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 52746884466210ec366bc04a3a6cb03f413619353c73143d79c1024e676e598e --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-04 10:00:58,075 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-04 10:00:58,165 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2025-03-04 10:00:58,171 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-04 10:00:58,172 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-04 10:00:58,194 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-04 10:00:58,195 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-04 10:00:58,195 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-04 10:00:58,195 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-04 10:00:58,196 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-04 10:00:58,196 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-04 10:00:58,197 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-04 10:00:58,197 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-04 10:00:58,197 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-04 10:00:58,197 INFO L153 SettingsManager]: * Use SBE=true [2025-03-04 10:00:58,197 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-04 10:00:58,197 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-04 10:00:58,197 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-04 10:00:58,197 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-04 10:00:58,197 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-04 10:00:58,197 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-04 10:00:58,197 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-04 10:00:58,197 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-04 10:00:58,197 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-04 10:00:58,197 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-04 10:00:58,198 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2025-03-04 10:00:58,198 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2025-03-04 10:00:58,198 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-04 10:00:58,198 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-04 10:00:58,198 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-04 10:00:58,198 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-04 10:00:58,198 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-04 10:00:58,198 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-04 10:00:58,198 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-04 10:00:58,198 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-04 10:00:58,198 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 10:00:58,198 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-04 10:00:58,198 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-04 10:00:58,198 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2025-03-04 10:00:58,198 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2025-03-04 10:00:58,198 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-04 10:00:58,198 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-04 10:00:58,198 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-04 10:00:58,198 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-04 10:00:58,198 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 -> 52746884466210ec366bc04a3a6cb03f413619353c73143d79c1024e676e598e [2025-03-04 10:00:58,438 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-04 10:00:58,444 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-04 10:00:58,445 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-04 10:00:58,446 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-04 10:00:58,446 INFO L274 PluginConnector]: CDTParser initialized [2025-03-04 10:00:58,448 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/09-regions_21-arrayloop2_nr.i [2025-03-04 10:00:59,561 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1f780549/33dc218288ad4758a9ecd3e4907da3fc/FLAG4efface15 [2025-03-04 10:00:59,808 INFO L384 CDTParser]: Found 1 translation units. [2025-03-04 10:00:59,808 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_21-arrayloop2_nr.i [2025-03-04 10:00:59,824 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1f780549/33dc218288ad4758a9ecd3e4907da3fc/FLAG4efface15 [2025-03-04 10:00:59,840 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1f780549/33dc218288ad4758a9ecd3e4907da3fc [2025-03-04 10:00:59,842 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-04 10:00:59,843 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-04 10:00:59,844 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-04 10:00:59,845 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-04 10:00:59,848 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-04 10:00:59,848 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 10:00:59" (1/1) ... [2025-03-04 10:00:59,849 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f797acd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:00:59, skipping insertion in model container [2025-03-04 10:00:59,849 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 10:00:59" (1/1) ... [2025-03-04 10:00:59,885 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-04 10:01:00,216 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:01:00,216 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:01:00,217 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:01:00,218 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:01:00,240 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 10:01:00,268 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2025-03-04 10:01:00,275 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-04 10:01:00,298 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:01:00,299 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:01:00,299 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:01:00,299 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:01:00,311 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 10:01:00,334 INFO L200 MainTranslator]: Completed pre-run [2025-03-04 10:01:00,371 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:01:00,375 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:01:00,375 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:01:00,375 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:01:00,385 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 10:01:00,443 INFO L204 MainTranslator]: Completed translation [2025-03-04 10:01:00,444 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:01:00 WrapperNode [2025-03-04 10:01:00,445 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-04 10:01:00,446 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-04 10:01:00,446 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-04 10:01:00,446 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-04 10:01:00,451 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:01:00" (1/1) ... [2025-03-04 10:01:00,474 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:01:00" (1/1) ... [2025-03-04 10:01:00,501 INFO L138 Inliner]: procedures = 274, calls = 95, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 169 [2025-03-04 10:01:00,505 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-04 10:01:00,505 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-04 10:01:00,505 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-04 10:01:00,505 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-04 10:01:00,512 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:01:00" (1/1) ... [2025-03-04 10:01:00,512 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:01:00" (1/1) ... [2025-03-04 10:01:00,517 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:01:00" (1/1) ... [2025-03-04 10:01:00,535 INFO L175 MemorySlicer]: Split 84 memory accesses to 1 slices as follows [84]. 100 percent of accesses are in the largest equivalence class. The 70 initializations are split as follows [70]. The 10 writes are split as follows [10]. [2025-03-04 10:01:00,535 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:01:00" (1/1) ... [2025-03-04 10:01:00,535 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:01:00" (1/1) ... [2025-03-04 10:01:00,545 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:01:00" (1/1) ... [2025-03-04 10:01:00,546 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:01:00" (1/1) ... [2025-03-04 10:01:00,548 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:01:00" (1/1) ... [2025-03-04 10:01:00,551 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:01:00" (1/1) ... [2025-03-04 10:01:00,565 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-04 10:01:00,566 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-04 10:01:00,566 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-04 10:01:00,566 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-04 10:01:00,566 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:01:00" (1/1) ... [2025-03-04 10:01:00,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 10:01:00,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:01:00,598 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 10:01:00,600 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 10:01:00,615 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2025-03-04 10:01:00,615 INFO L130 BoogieDeclarations]: Found specification of procedure f [2025-03-04 10:01:00,615 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2025-03-04 10:01:00,615 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-03-04 10:01:00,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2025-03-04 10:01:00,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2025-03-04 10:01:00,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#0 [2025-03-04 10:01:00,615 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-03-04 10:01:00,616 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-03-04 10:01:00,616 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-04 10:01:00,616 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-04 10:01:00,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-03-04 10:01:00,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-04 10:01:00,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-04 10:01:00,617 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 10:01:00,720 INFO L256 CfgBuilder]: Building ICFG [2025-03-04 10:01:00,722 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-04 10:01:01,196 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-04 10:01:01,197 INFO L307 CfgBuilder]: Performing block encoding [2025-03-04 10:01:02,362 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-04 10:01:02,363 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-04 10:01:02,364 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 10:01:02 BoogieIcfgContainer [2025-03-04 10:01:02,364 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-04 10:01:02,365 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-04 10:01:02,366 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-04 10:01:02,370 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-04 10:01:02,370 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.03 10:00:59" (1/3) ... [2025-03-04 10:01:02,371 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45c4ce79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 10:01:02, skipping insertion in model container [2025-03-04 10:01:02,371 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:01:00" (2/3) ... [2025-03-04 10:01:02,371 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45c4ce79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 10:01:02, skipping insertion in model container [2025-03-04 10:01:02,371 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 10:01:02" (3/3) ... [2025-03-04 10:01:02,372 INFO L128 eAbstractionObserver]: Analyzing ICFG 09-regions_21-arrayloop2_nr.i [2025-03-04 10:01:02,383 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-04 10:01:02,385 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 09-regions_21-arrayloop2_nr.i that has 2 procedures, 60 locations, 1 initial locations, 4 loop locations, and 29 error locations. [2025-03-04 10:01:02,385 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-04 10:01:02,467 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-03-04 10:01:02,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 85 transitions, 178 flow [2025-03-04 10:01:02,540 INFO L124 PetriNetUnfolderBase]: 6/83 cut-off events. [2025-03-04 10:01:02,545 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-04 10:01:02,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 83 events. 6/83 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 318 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2025-03-04 10:01:02,547 INFO L82 GeneralOperation]: Start removeDead. Operand has 86 places, 85 transitions, 178 flow [2025-03-04 10:01:02,550 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 83 transitions, 172 flow [2025-03-04 10:01:02,558 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-04 10:01:02,568 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;@2bd26f05, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-04 10:01:02,569 INFO L334 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2025-03-04 10:01:02,575 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-04 10:01:02,575 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2025-03-04 10:01:02,576 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-04 10:01:02,576 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:01:02,576 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-04 10:01:02,576 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2025-03-04 10:01:02,581 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:01:02,581 INFO L85 PathProgramCache]: Analyzing trace with hash 464282, now seen corresponding path program 1 times [2025-03-04 10:01:02,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:01:02,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1281747627] [2025-03-04 10:01:02,592 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:01:02,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:01:02,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:01:02,595 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 10:01:02,597 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 10:01:02,663 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-04 10:01:02,778 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-04 10:01:02,779 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:01:02,779 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:01:02,795 INFO L256 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-04 10:01:02,798 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:01:02,865 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 10:01:02,866 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:01:02,867 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:01:02,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281747627] [2025-03-04 10:01:02,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281747627] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:01:02,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:01:02,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-04 10:01:02,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498740274] [2025-03-04 10:01:02,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:01:02,875 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 10:01:02,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:01:02,892 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 10:01:02,893 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 10:01:03,037 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 85 [2025-03-04 10:01:03,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 83 transitions, 172 flow. Second operand has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:01:03,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:01:03,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 85 [2025-03-04 10:01:03,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:01:03,327 INFO L124 PetriNetUnfolderBase]: 389/873 cut-off events. [2025-03-04 10:01:03,327 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2025-03-04 10:01:03,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1502 conditions, 873 events. 389/873 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5163 event pairs, 287 based on Foata normal form. 1/733 useless extension candidates. Maximal degree in co-relation 1449. Up to 606 conditions per place. [2025-03-04 10:01:03,338 INFO L140 encePairwiseOnDemand]: 78/85 looper letters, 32 selfloop transitions, 3 changer transitions 0/79 dead transitions. [2025-03-04 10:01:03,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 79 transitions, 234 flow [2025-03-04 10:01:03,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 10:01:03,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 10:01:03,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 223 transitions. [2025-03-04 10:01:03,349 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6558823529411765 [2025-03-04 10:01:03,350 INFO L175 Difference]: Start difference. First operand has 84 places, 83 transitions, 172 flow. Second operand 4 states and 223 transitions. [2025-03-04 10:01:03,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 79 transitions, 234 flow [2025-03-04 10:01:03,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 79 transitions, 232 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-04 10:01:03,357 INFO L231 Difference]: Finished difference. Result has 81 places, 79 transitions, 168 flow [2025-03-04 10:01:03,358 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=81, PETRI_TRANSITIONS=79} [2025-03-04 10:01:03,364 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -3 predicate places. [2025-03-04 10:01:03,364 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 79 transitions, 168 flow [2025-03-04 10:01:03,364 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:01:03,364 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:01:03,364 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-04 10:01:03,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-04 10:01:03,568 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 10:01:03,568 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2025-03-04 10:01:03,569 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:01:03,569 INFO L85 PathProgramCache]: Analyzing trace with hash 464283, now seen corresponding path program 1 times [2025-03-04 10:01:03,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:01:03,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1022714351] [2025-03-04 10:01:03,570 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:01:03,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:01:03,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:01:03,574 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 10:01:03,575 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 10:01:03,626 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-04 10:01:03,768 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-04 10:01:03,768 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:01:03,768 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:01:03,786 INFO L256 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-04 10:01:03,787 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:01:03,835 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 10:01:03,835 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:01:03,835 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:01:03,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022714351] [2025-03-04 10:01:03,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022714351] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:01:03,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:01:03,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-04 10:01:03,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471311953] [2025-03-04 10:01:03,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:01:03,836 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 10:01:03,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:01:03,837 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 10:01:03,837 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 10:01:03,983 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 85 [2025-03-04 10:01:03,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 79 transitions, 168 flow. Second operand has 4 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:01:03,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:01:03,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 85 [2025-03-04 10:01:03,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:01:04,225 INFO L124 PetriNetUnfolderBase]: 390/878 cut-off events. [2025-03-04 10:01:04,226 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-04 10:01:04,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1517 conditions, 878 events. 390/878 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5085 event pairs, 287 based on Foata normal form. 3/741 useless extension candidates. Maximal degree in co-relation 1489. Up to 611 conditions per place. [2025-03-04 10:01:04,231 INFO L140 encePairwiseOnDemand]: 77/85 looper letters, 36 selfloop transitions, 5 changer transitions 0/83 dead transitions. [2025-03-04 10:01:04,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 83 transitions, 262 flow [2025-03-04 10:01:04,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 10:01:04,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 10:01:04,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 236 transitions. [2025-03-04 10:01:04,234 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6941176470588235 [2025-03-04 10:01:04,234 INFO L175 Difference]: Start difference. First operand has 81 places, 79 transitions, 168 flow. Second operand 4 states and 236 transitions. [2025-03-04 10:01:04,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 83 transitions, 262 flow [2025-03-04 10:01:04,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 83 transitions, 252 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-04 10:01:04,237 INFO L231 Difference]: Finished difference. Result has 83 places, 83 transitions, 201 flow [2025-03-04 10:01:04,238 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=201, PETRI_PLACES=83, PETRI_TRANSITIONS=83} [2025-03-04 10:01:04,238 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -1 predicate places. [2025-03-04 10:01:04,238 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 83 transitions, 201 flow [2025-03-04 10:01:04,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:01:04,239 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:01:04,239 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-03-04 10:01:04,249 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 10:01:04,439 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 10:01:04,440 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2025-03-04 10:01:04,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:01:04,440 INFO L85 PathProgramCache]: Analyzing trace with hash 946900706, now seen corresponding path program 1 times [2025-03-04 10:01:04,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:01:04,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1267268662] [2025-03-04 10:01:04,441 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:01:04,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:01:04,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:01:04,443 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 10:01:04,445 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 10:01:04,503 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-04 10:01:04,613 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-04 10:01:04,613 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:01:04,613 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:01:04,630 INFO L256 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-04 10:01:04,631 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:01:04,647 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 10:01:04,655 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 10:01:04,656 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:01:04,656 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:01:04,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267268662] [2025-03-04 10:01:04,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267268662] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:01:04,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:01:04,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-04 10:01:04,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370372627] [2025-03-04 10:01:04,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:01:04,656 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-04 10:01:04,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:01:04,657 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-04 10:01:04,657 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 10:01:04,738 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 85 [2025-03-04 10:01:04,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 83 transitions, 201 flow. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:01:04,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:01:04,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 85 [2025-03-04 10:01:04,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:01:04,959 INFO L124 PetriNetUnfolderBase]: 390/877 cut-off events. [2025-03-04 10:01:04,960 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-04 10:01:04,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1525 conditions, 877 events. 390/877 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5083 event pairs, 287 based on Foata normal form. 0/736 useless extension candidates. Maximal degree in co-relation 1495. Up to 607 conditions per place. [2025-03-04 10:01:04,966 INFO L140 encePairwiseOnDemand]: 82/85 looper letters, 34 selfloop transitions, 3 changer transitions 0/82 dead transitions. [2025-03-04 10:01:04,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 82 transitions, 273 flow [2025-03-04 10:01:04,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-04 10:01:04,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-04 10:01:04,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 187 transitions. [2025-03-04 10:01:04,970 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7333333333333333 [2025-03-04 10:01:04,970 INFO L175 Difference]: Start difference. First operand has 83 places, 83 transitions, 201 flow. Second operand 3 states and 187 transitions. [2025-03-04 10:01:04,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 82 transitions, 273 flow [2025-03-04 10:01:04,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 82 transitions, 270 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-04 10:01:04,973 INFO L231 Difference]: Finished difference. Result has 83 places, 82 transitions, 202 flow [2025-03-04 10:01:04,973 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=83, PETRI_TRANSITIONS=82} [2025-03-04 10:01:04,974 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -1 predicate places. [2025-03-04 10:01:04,974 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 82 transitions, 202 flow [2025-03-04 10:01:04,974 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:01:04,975 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:01:04,975 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-03-04 10:01:04,986 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 10:01:05,179 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 10:01:05,179 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2025-03-04 10:01:05,179 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:01:05,179 INFO L85 PathProgramCache]: Analyzing trace with hash 946900705, now seen corresponding path program 1 times [2025-03-04 10:01:05,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:01:05,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [776298590] [2025-03-04 10:01:05,180 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:01:05,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:01:05,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:01:05,182 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 10:01:05,182 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 10:01:05,230 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-04 10:01:05,339 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-04 10:01:05,339 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:01:05,339 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:01:05,354 INFO L256 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-04 10:01:05,356 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:01:05,361 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 10:01:05,364 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 10:01:05,364 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:01:05,364 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:01:05,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776298590] [2025-03-04 10:01:05,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776298590] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:01:05,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:01:05,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-04 10:01:05,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451947594] [2025-03-04 10:01:05,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:01:05,365 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-04 10:01:05,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:01:05,365 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-04 10:01:05,365 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 10:01:05,419 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 85 [2025-03-04 10:01:05,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 82 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:01:05,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:01:05,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 85 [2025-03-04 10:01:05,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:01:05,604 INFO L124 PetriNetUnfolderBase]: 390/876 cut-off events. [2025-03-04 10:01:05,604 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-03-04 10:01:05,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1525 conditions, 876 events. 390/876 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5070 event pairs, 287 based on Foata normal form. 0/737 useless extension candidates. Maximal degree in co-relation 1494. Up to 607 conditions per place. [2025-03-04 10:01:05,608 INFO L140 encePairwiseOnDemand]: 82/85 looper letters, 34 selfloop transitions, 3 changer transitions 0/81 dead transitions. [2025-03-04 10:01:05,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 81 transitions, 274 flow [2025-03-04 10:01:05,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-04 10:01:05,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-04 10:01:05,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 187 transitions. [2025-03-04 10:01:05,610 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7333333333333333 [2025-03-04 10:01:05,610 INFO L175 Difference]: Start difference. First operand has 83 places, 82 transitions, 202 flow. Second operand 3 states and 187 transitions. [2025-03-04 10:01:05,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 81 transitions, 274 flow [2025-03-04 10:01:05,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 81 transitions, 268 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-04 10:01:05,612 INFO L231 Difference]: Finished difference. Result has 82 places, 81 transitions, 200 flow [2025-03-04 10:01:05,612 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=82, PETRI_TRANSITIONS=81} [2025-03-04 10:01:05,612 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -2 predicate places. [2025-03-04 10:01:05,612 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 81 transitions, 200 flow [2025-03-04 10:01:05,613 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:01:05,613 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:01:05,613 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2025-03-04 10:01:05,626 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 10:01:05,813 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 10:01:05,814 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2025-03-04 10:01:05,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:01:05,814 INFO L85 PathProgramCache]: Analyzing trace with hash -710850461, now seen corresponding path program 1 times [2025-03-04 10:01:05,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:01:05,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1926314278] [2025-03-04 10:01:05,815 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:01:05,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:01:05,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:01:05,817 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 10:01:05,818 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 10:01:05,867 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-04 10:01:05,975 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-04 10:01:05,975 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:01:05,975 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:01:05,990 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-03-04 10:01:05,991 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:01:05,996 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 10:01:05,996 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:01:05,996 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:01:05,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926314278] [2025-03-04 10:01:05,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926314278] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:01:05,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:01:05,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 10:01:05,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592959104] [2025-03-04 10:01:05,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:01:05,996 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-04 10:01:05,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:01:05,997 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-04 10:01:05,997 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 10:01:05,997 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 85 [2025-03-04 10:01:05,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 81 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:01:05,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:01:05,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 85 [2025-03-04 10:01:05,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:01:06,205 INFO L124 PetriNetUnfolderBase]: 389/898 cut-off events. [2025-03-04 10:01:06,206 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-03-04 10:01:06,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1553 conditions, 898 events. 389/898 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5085 event pairs, 287 based on Foata normal form. 2/750 useless extension candidates. Maximal degree in co-relation 1525. Up to 607 conditions per place. [2025-03-04 10:01:06,211 INFO L140 encePairwiseOnDemand]: 82/85 looper letters, 38 selfloop transitions, 3 changer transitions 0/85 dead transitions. [2025-03-04 10:01:06,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 85 transitions, 294 flow [2025-03-04 10:01:06,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-04 10:01:06,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-04 10:01:06,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 195 transitions. [2025-03-04 10:01:06,213 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7647058823529411 [2025-03-04 10:01:06,213 INFO L175 Difference]: Start difference. First operand has 82 places, 81 transitions, 200 flow. Second operand 3 states and 195 transitions. [2025-03-04 10:01:06,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 85 transitions, 294 flow [2025-03-04 10:01:06,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 85 transitions, 284 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-04 10:01:06,215 INFO L231 Difference]: Finished difference. Result has 83 places, 81 transitions, 205 flow [2025-03-04 10:01:06,216 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=205, PETRI_PLACES=83, PETRI_TRANSITIONS=81} [2025-03-04 10:01:06,216 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -1 predicate places. [2025-03-04 10:01:06,216 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 81 transitions, 205 flow [2025-03-04 10:01:06,216 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:01:06,216 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:01:06,216 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:01:06,228 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 10:01:06,416 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 10:01:06,417 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2025-03-04 10:01:06,417 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:01:06,417 INFO L85 PathProgramCache]: Analyzing trace with hash -710848706, now seen corresponding path program 1 times [2025-03-04 10:01:06,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:01:06,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [227831622] [2025-03-04 10:01:06,418 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:01:06,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:01:06,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:01:06,420 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 10:01:06,421 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 10:01:06,483 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-04 10:01:06,594 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-04 10:01:06,594 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:01:06,594 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:01:06,611 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-04 10:01:06,614 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:01:06,619 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 10:01:06,632 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 10:01:06,632 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:01:06,633 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:01:06,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227831622] [2025-03-04 10:01:06,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227831622] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:01:06,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:01:06,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 10:01:06,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858336114] [2025-03-04 10:01:06,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:01:06,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 10:01:06,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:01:06,633 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 10:01:06,633 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 10:01:06,705 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 85 [2025-03-04 10:01:06,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 81 transitions, 205 flow. Second operand has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:01:06,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:01:06,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 85 [2025-03-04 10:01:06,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:01:06,925 INFO L124 PetriNetUnfolderBase]: 389/894 cut-off events. [2025-03-04 10:01:06,926 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2025-03-04 10:01:06,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1555 conditions, 894 events. 389/894 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5059 event pairs, 287 based on Foata normal form. 0/750 useless extension candidates. Maximal degree in co-relation 1524. Up to 609 conditions per place. [2025-03-04 10:01:06,931 INFO L140 encePairwiseOnDemand]: 78/85 looper letters, 32 selfloop transitions, 7 changer transitions 0/79 dead transitions. [2025-03-04 10:01:06,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 79 transitions, 279 flow [2025-03-04 10:01:06,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-04 10:01:06,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-04 10:01:06,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 262 transitions. [2025-03-04 10:01:06,933 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6164705882352941 [2025-03-04 10:01:06,933 INFO L175 Difference]: Start difference. First operand has 83 places, 81 transitions, 205 flow. Second operand 5 states and 262 transitions. [2025-03-04 10:01:06,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 79 transitions, 279 flow [2025-03-04 10:01:06,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 79 transitions, 276 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-04 10:01:06,936 INFO L231 Difference]: Finished difference. Result has 84 places, 79 transitions, 212 flow [2025-03-04 10:01:06,937 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=212, PETRI_PLACES=84, PETRI_TRANSITIONS=79} [2025-03-04 10:01:06,937 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 0 predicate places. [2025-03-04 10:01:06,937 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 79 transitions, 212 flow [2025-03-04 10:01:06,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:01:06,937 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:01:06,937 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:01:06,950 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 10:01:07,138 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 10:01:07,138 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2025-03-04 10:01:07,138 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:01:07,138 INFO L85 PathProgramCache]: Analyzing trace with hash -710848705, now seen corresponding path program 1 times [2025-03-04 10:01:07,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:01:07,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1841096582] [2025-03-04 10:01:07,139 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:01:07,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:01:07,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:01:07,141 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 10:01:07,142 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 10:01:07,191 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-04 10:01:07,325 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-04 10:01:07,327 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:01:07,327 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:01:07,345 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-04 10:01:07,346 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:01:07,352 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 10:01:07,377 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 10:01:07,377 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:01:07,377 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:01:07,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841096582] [2025-03-04 10:01:07,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841096582] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:01:07,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:01:07,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 10:01:07,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32152419] [2025-03-04 10:01:07,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:01:07,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 10:01:07,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:01:07,378 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 10:01:07,378 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 10:01:07,498 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 85 [2025-03-04 10:01:07,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 79 transitions, 212 flow. Second operand has 4 states, 4 states have (on average 48.5) internal successors, (194), 4 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:01:07,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:01:07,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 85 [2025-03-04 10:01:07,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:01:07,720 INFO L124 PetriNetUnfolderBase]: 389/890 cut-off events. [2025-03-04 10:01:07,720 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2025-03-04 10:01:07,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1559 conditions, 890 events. 389/890 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5064 event pairs, 287 based on Foata normal form. 4/750 useless extension candidates. Maximal degree in co-relation 1523. Up to 611 conditions per place. [2025-03-04 10:01:07,724 INFO L140 encePairwiseOnDemand]: 80/85 looper letters, 35 selfloop transitions, 4 changer transitions 0/77 dead transitions. [2025-03-04 10:01:07,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 77 transitions, 286 flow [2025-03-04 10:01:07,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 10:01:07,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 10:01:07,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 225 transitions. [2025-03-04 10:01:07,725 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6617647058823529 [2025-03-04 10:01:07,725 INFO L175 Difference]: Start difference. First operand has 84 places, 79 transitions, 212 flow. Second operand 4 states and 225 transitions. [2025-03-04 10:01:07,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 77 transitions, 286 flow [2025-03-04 10:01:07,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 77 transitions, 272 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-04 10:01:07,726 INFO L231 Difference]: Finished difference. Result has 81 places, 77 transitions, 202 flow [2025-03-04 10:01:07,727 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=202, PETRI_PLACES=81, PETRI_TRANSITIONS=77} [2025-03-04 10:01:07,727 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -3 predicate places. [2025-03-04 10:01:07,727 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 77 transitions, 202 flow [2025-03-04 10:01:07,727 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.5) internal successors, (194), 4 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:01:07,727 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:01:07,727 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:01:07,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-04 10:01:07,927 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 10:01:07,928 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2025-03-04 10:01:07,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:01:07,928 INFO L85 PathProgramCache]: Analyzing trace with hash -225794600, now seen corresponding path program 1 times [2025-03-04 10:01:07,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:01:07,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [926224446] [2025-03-04 10:01:07,929 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:01:07,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:01:07,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:01:07,930 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 10:01:07,931 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 10:01:07,987 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-04 10:01:08,125 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-04 10:01:08,125 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:01:08,125 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:01:08,142 INFO L256 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-04 10:01:08,143 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:01:08,188 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2025-03-04 10:01:08,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2025-03-04 10:01:08,212 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 10:01:08,213 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:01:08,213 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:01:08,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926224446] [2025-03-04 10:01:08,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926224446] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:01:08,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:01:08,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-04 10:01:08,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410169510] [2025-03-04 10:01:08,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:01:08,213 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 10:01:08,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:01:08,213 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 10:01:08,213 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 10:01:08,310 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 85 [2025-03-04 10:01:08,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 77 transitions, 202 flow. Second operand has 4 states, 4 states have (on average 49.75) internal successors, (199), 4 states have internal predecessors, (199), 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 10:01:08,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:01:08,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 85 [2025-03-04 10:01:08,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:01:08,521 INFO L124 PetriNetUnfolderBase]: 389/886 cut-off events. [2025-03-04 10:01:08,521 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2025-03-04 10:01:08,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1549 conditions, 886 events. 389/886 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5049 event pairs, 287 based on Foata normal form. 2/748 useless extension candidates. Maximal degree in co-relation 1518. Up to 609 conditions per place. [2025-03-04 10:01:08,525 INFO L140 encePairwiseOnDemand]: 80/85 looper letters, 33 selfloop transitions, 4 changer transitions 0/75 dead transitions. [2025-03-04 10:01:08,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 75 transitions, 272 flow [2025-03-04 10:01:08,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 10:01:08,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 10:01:08,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 227 transitions. [2025-03-04 10:01:08,528 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6676470588235294 [2025-03-04 10:01:08,528 INFO L175 Difference]: Start difference. First operand has 81 places, 77 transitions, 202 flow. Second operand 4 states and 227 transitions. [2025-03-04 10:01:08,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 75 transitions, 272 flow [2025-03-04 10:01:08,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 75 transitions, 264 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-04 10:01:08,531 INFO L231 Difference]: Finished difference. Result has 79 places, 75 transitions, 198 flow [2025-03-04 10:01:08,531 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=198, PETRI_PLACES=79, PETRI_TRANSITIONS=75} [2025-03-04 10:01:08,532 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -5 predicate places. [2025-03-04 10:01:08,532 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 75 transitions, 198 flow [2025-03-04 10:01:08,532 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.75) internal successors, (199), 4 states have internal predecessors, (199), 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 10:01:08,532 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:01:08,532 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:01:08,546 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 10:01:08,732 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 10:01:08,733 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2025-03-04 10:01:08,733 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:01:08,733 INFO L85 PathProgramCache]: Analyzing trace with hash -225794599, now seen corresponding path program 1 times [2025-03-04 10:01:08,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:01:08,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [44740056] [2025-03-04 10:01:08,733 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:01:08,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:01:08,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:01:08,735 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 10:01:08,736 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 10:01:08,792 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-04 10:01:08,917 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-04 10:01:08,917 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:01:08,917 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:01:08,934 INFO L256 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-04 10:01:08,935 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:01:09,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-04 10:01:09,003 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 10:01:09,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:01:09,046 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:01:09,046 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:01:09,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44740056] [2025-03-04 10:01:09,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44740056] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:01:09,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:01:09,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 10:01:09,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753831135] [2025-03-04 10:01:09,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:01:09,046 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-04 10:01:09,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:01:09,047 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-04 10:01:09,047 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-04 10:01:09,297 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 85 [2025-03-04 10:01:09,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 75 transitions, 198 flow. Second operand has 5 states, 5 states have (on average 49.4) internal successors, (247), 5 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:01:09,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:01:09,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 85 [2025-03-04 10:01:09,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:01:09,547 INFO L124 PetriNetUnfolderBase]: 390/916 cut-off events. [2025-03-04 10:01:09,548 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2025-03-04 10:01:09,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1600 conditions, 916 events. 390/916 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5360 event pairs, 287 based on Foata normal form. 2/764 useless extension candidates. Maximal degree in co-relation 1512. Up to 615 conditions per place. [2025-03-04 10:01:09,551 INFO L140 encePairwiseOnDemand]: 79/85 looper letters, 41 selfloop transitions, 5 changer transitions 0/82 dead transitions. [2025-03-04 10:01:09,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 82 transitions, 320 flow [2025-03-04 10:01:09,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 10:01:09,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 10:01:09,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 237 transitions. [2025-03-04 10:01:09,553 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6970588235294117 [2025-03-04 10:01:09,553 INFO L175 Difference]: Start difference. First operand has 79 places, 75 transitions, 198 flow. Second operand 4 states and 237 transitions. [2025-03-04 10:01:09,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 82 transitions, 320 flow [2025-03-04 10:01:09,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 82 transitions, 306 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-04 10:01:09,556 INFO L231 Difference]: Finished difference. Result has 81 places, 79 transitions, 236 flow [2025-03-04 10:01:09,556 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=236, PETRI_PLACES=81, PETRI_TRANSITIONS=79} [2025-03-04 10:01:09,557 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -3 predicate places. [2025-03-04 10:01:09,557 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 79 transitions, 236 flow [2025-03-04 10:01:09,557 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 49.4) internal successors, (247), 5 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:01:09,557 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:01:09,557 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:01:09,572 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 10:01:09,758 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 10:01:09,759 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2025-03-04 10:01:09,759 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:01:09,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1590302507, now seen corresponding path program 1 times [2025-03-04 10:01:09,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:01:09,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1466878242] [2025-03-04 10:01:09,760 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:01:09,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:01:09,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:01:09,762 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 10:01:09,763 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 10:01:09,839 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-04 10:01:09,977 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-04 10:01:09,978 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:01:09,978 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:01:09,996 INFO L256 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-03-04 10:01:09,999 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:01:10,069 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 10:01:10,078 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 10:01:10,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-03-04 10:01:10,127 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 19 treesize of output 18 [2025-03-04 10:01:10,194 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-03-04 10:01:10,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2025-03-04 10:01:10,212 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-03-04 10:01:10,212 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 10:01:10,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2025-03-04 10:01:10,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2025-03-04 10:01:10,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2025-03-04 10:01:10,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2025-03-04 10:01:10,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2025-03-04 10:01:10,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2025-03-04 10:01:10,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:01:10,446 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:01:10,446 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:01:10,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466878242] [2025-03-04 10:01:10,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466878242] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:01:10,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:01:10,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-04 10:01:10,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643106167] [2025-03-04 10:01:10,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:01:10,446 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-04 10:01:10,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:01:10,447 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-04 10:01:10,447 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-03-04 10:01:11,171 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 85 [2025-03-04 10:01:11,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 79 transitions, 236 flow. Second operand has 10 states, 10 states have (on average 34.0) internal successors, (340), 10 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:01:11,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:01:11,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 85 [2025-03-04 10:01:11,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:01:11,747 INFO L124 PetriNetUnfolderBase]: 390/915 cut-off events. [2025-03-04 10:01:11,747 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2025-03-04 10:01:11,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1635 conditions, 915 events. 390/915 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5383 event pairs, 287 based on Foata normal form. 0/776 useless extension candidates. Maximal degree in co-relation 1546. Up to 628 conditions per place. [2025-03-04 10:01:11,751 INFO L140 encePairwiseOnDemand]: 73/85 looper letters, 56 selfloop transitions, 11 changer transitions 0/95 dead transitions. [2025-03-04 10:01:11,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 95 transitions, 408 flow [2025-03-04 10:01:11,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-04 10:01:11,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-04 10:01:11,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 430 transitions. [2025-03-04 10:01:11,753 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45989304812834225 [2025-03-04 10:01:11,753 INFO L175 Difference]: Start difference. First operand has 81 places, 79 transitions, 236 flow. Second operand 11 states and 430 transitions. [2025-03-04 10:01:11,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 95 transitions, 408 flow [2025-03-04 10:01:11,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 95 transitions, 406 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-04 10:01:11,755 INFO L231 Difference]: Finished difference. Result has 95 places, 84 transitions, 292 flow [2025-03-04 10:01:11,755 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=292, PETRI_PLACES=95, PETRI_TRANSITIONS=84} [2025-03-04 10:01:11,755 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 11 predicate places. [2025-03-04 10:01:11,755 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 84 transitions, 292 flow [2025-03-04 10:01:11,757 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 34.0) internal successors, (340), 10 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:01:11,758 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:01:11,758 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:01:11,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-04 10:01:11,962 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 10:01:11,962 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2025-03-04 10:01:11,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:01:11,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1590302506, now seen corresponding path program 1 times [2025-03-04 10:01:11,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:01:11,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1272788313] [2025-03-04 10:01:11,963 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:01:11,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:01:11,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:01:11,964 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 10:01:11,965 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 10:01:12,019 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-04 10:01:12,150 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-04 10:01:12,150 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:01:12,150 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:01:12,167 INFO L256 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-04 10:01:12,169 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:01:12,232 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 10:01:12,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-03-04 10:01:12,291 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-03-04 10:01:12,292 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 10:01:12,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2025-03-04 10:01:12,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2025-03-04 10:01:12,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2025-03-04 10:01:12,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:01:12,408 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:01:12,408 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:01:12,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272788313] [2025-03-04 10:01:12,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272788313] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:01:12,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:01:12,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-04 10:01:12,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673142226] [2025-03-04 10:01:12,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:01:12,408 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-04 10:01:12,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:01:12,408 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-04 10:01:12,409 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2025-03-04 10:01:13,323 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 85 [2025-03-04 10:01:13,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 84 transitions, 292 flow. Second operand has 10 states, 10 states have (on average 36.0) internal successors, (360), 10 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:01:13,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:01:13,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 85 [2025-03-04 10:01:13,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:01:13,975 INFO L124 PetriNetUnfolderBase]: 390/914 cut-off events. [2025-03-04 10:01:13,975 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2025-03-04 10:01:13,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1664 conditions, 914 events. 390/914 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5390 event pairs, 287 based on Foata normal form. 1/779 useless extension candidates. Maximal degree in co-relation 1587. Up to 624 conditions per place. [2025-03-04 10:01:13,980 INFO L140 encePairwiseOnDemand]: 73/85 looper letters, 54 selfloop transitions, 11 changer transitions 0/95 dead transitions. [2025-03-04 10:01:13,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 95 transitions, 452 flow [2025-03-04 10:01:13,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-04 10:01:13,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-04 10:01:13,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 450 transitions. [2025-03-04 10:01:13,983 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48128342245989303 [2025-03-04 10:01:13,983 INFO L175 Difference]: Start difference. First operand has 95 places, 84 transitions, 292 flow. Second operand 11 states and 450 transitions. [2025-03-04 10:01:13,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 95 transitions, 452 flow [2025-03-04 10:01:13,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 95 transitions, 448 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-04 10:01:13,987 INFO L231 Difference]: Finished difference. Result has 104 places, 84 transitions, 314 flow [2025-03-04 10:01:13,988 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=314, PETRI_PLACES=104, PETRI_TRANSITIONS=84} [2025-03-04 10:01:13,988 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 20 predicate places. [2025-03-04 10:01:13,990 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 84 transitions, 314 flow [2025-03-04 10:01:13,990 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 36.0) internal successors, (360), 10 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:01:13,990 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:01:13,990 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:01:14,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-04 10:01:14,190 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 10:01:14,191 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2025-03-04 10:01:14,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:01:14,191 INFO L85 PathProgramCache]: Analyzing trace with hash 2054737837, now seen corresponding path program 1 times [2025-03-04 10:01:14,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:01:14,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [653230875] [2025-03-04 10:01:14,191 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:01:14,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:01:14,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:01:14,193 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 10:01:14,194 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 10:01:14,250 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-04 10:01:14,375 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-04 10:01:14,375 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:01:14,375 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:01:14,392 INFO L256 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-04 10:01:14,393 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:01:14,397 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 10:01:14,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:01:14,423 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:01:14,423 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:01:14,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653230875] [2025-03-04 10:01:14,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653230875] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:01:14,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:01:14,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 10:01:14,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417728698] [2025-03-04 10:01:14,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:01:14,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 10:01:14,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:01:14,424 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 10:01:14,424 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 10:01:14,511 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 85 [2025-03-04 10:01:14,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 84 transitions, 314 flow. Second operand has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:01:14,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:01:14,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 85 [2025-03-04 10:01:14,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:01:14,698 INFO L124 PetriNetUnfolderBase]: 390/906 cut-off events. [2025-03-04 10:01:14,699 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2025-03-04 10:01:14,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1647 conditions, 906 events. 390/906 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5276 event pairs, 287 based on Foata normal form. 8/775 useless extension candidates. Maximal degree in co-relation 1577. Up to 608 conditions per place. [2025-03-04 10:01:14,702 INFO L140 encePairwiseOnDemand]: 80/85 looper letters, 35 selfloop transitions, 9 changer transitions 0/82 dead transitions. [2025-03-04 10:01:14,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 82 transitions, 398 flow [2025-03-04 10:01:14,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 10:01:14,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 10:01:14,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 231 transitions. [2025-03-04 10:01:14,704 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6794117647058824 [2025-03-04 10:01:14,704 INFO L175 Difference]: Start difference. First operand has 104 places, 84 transitions, 314 flow. Second operand 4 states and 231 transitions. [2025-03-04 10:01:14,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 82 transitions, 398 flow [2025-03-04 10:01:14,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 82 transitions, 376 flow, removed 0 selfloop flow, removed 10 redundant places. [2025-03-04 10:01:14,707 INFO L231 Difference]: Finished difference. Result has 95 places, 82 transitions, 306 flow [2025-03-04 10:01:14,707 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=306, PETRI_PLACES=95, PETRI_TRANSITIONS=82} [2025-03-04 10:01:14,709 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 11 predicate places. [2025-03-04 10:01:14,709 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 82 transitions, 306 flow [2025-03-04 10:01:14,710 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:01:14,710 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:01:14,710 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:01:14,722 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 10:01:14,910 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 10:01:14,910 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2025-03-04 10:01:14,911 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:01:14,911 INFO L85 PathProgramCache]: Analyzing trace with hash 2054737836, now seen corresponding path program 1 times [2025-03-04 10:01:14,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:01:14,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1241874353] [2025-03-04 10:01:14,911 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:01:14,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:01:14,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:01:14,914 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 10:01:14,915 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 10:01:14,976 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-04 10:01:15,093 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-04 10:01:15,093 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:01:15,093 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:01:15,109 INFO L256 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-04 10:01:15,110 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:01:15,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 10:01:15,123 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:01:15,123 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:01:15,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241874353] [2025-03-04 10:01:15,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241874353] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:01:15,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:01:15,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 10:01:15,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152193755] [2025-03-04 10:01:15,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:01:15,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 10:01:15,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:01:15,124 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 10:01:15,124 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 10:01:15,170 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 85 [2025-03-04 10:01:15,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 82 transitions, 306 flow. Second operand has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 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 10:01:15,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:01:15,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 85 [2025-03-04 10:01:15,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:01:15,366 INFO L124 PetriNetUnfolderBase]: 390/898 cut-off events. [2025-03-04 10:01:15,367 INFO L125 PetriNetUnfolderBase]: For 64/64 co-relation queries the response was YES. [2025-03-04 10:01:15,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1648 conditions, 898 events. 390/898 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5237 event pairs, 287 based on Foata normal form. 0/767 useless extension candidates. Maximal degree in co-relation 1585. Up to 608 conditions per place. [2025-03-04 10:01:15,371 INFO L140 encePairwiseOnDemand]: 80/85 looper letters, 37 selfloop transitions, 9 changer transitions 0/80 dead transitions. [2025-03-04 10:01:15,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 80 transitions, 394 flow [2025-03-04 10:01:15,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 10:01:15,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 10:01:15,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 225 transitions. [2025-03-04 10:01:15,372 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6617647058823529 [2025-03-04 10:01:15,373 INFO L175 Difference]: Start difference. First operand has 95 places, 82 transitions, 306 flow. Second operand 4 states and 225 transitions. [2025-03-04 10:01:15,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 80 transitions, 394 flow [2025-03-04 10:01:15,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 80 transitions, 376 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-04 10:01:15,374 INFO L231 Difference]: Finished difference. Result has 93 places, 80 transitions, 302 flow [2025-03-04 10:01:15,374 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=302, PETRI_PLACES=93, PETRI_TRANSITIONS=80} [2025-03-04 10:01:15,375 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 9 predicate places. [2025-03-04 10:01:15,375 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 80 transitions, 302 flow [2025-03-04 10:01:15,375 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 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 10:01:15,375 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:01:15,375 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:01:15,386 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 10:01:15,579 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 10:01:15,579 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2025-03-04 10:01:15,579 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:01:15,579 INFO L85 PathProgramCache]: Analyzing trace with hash -967877005, now seen corresponding path program 1 times [2025-03-04 10:01:15,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:01:15,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1814460204] [2025-03-04 10:01:15,580 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:01:15,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:01:15,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:01:15,582 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 10:01:15,583 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 10:01:15,652 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-04 10:01:15,776 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-04 10:01:15,776 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:01:15,776 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:01:15,794 INFO L256 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-04 10:01:15,795 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:01:15,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:01:15,811 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 10:01:15,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:01:15,832 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:01:15,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814460204] [2025-03-04 10:01:15,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814460204] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 10:01:15,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-04 10:01:15,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2025-03-04 10:01:15,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748278072] [2025-03-04 10:01:15,833 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-04 10:01:15,833 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-04 10:01:15,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:01:15,833 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-04 10:01:15,833 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-03-04 10:01:15,833 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 85 [2025-03-04 10:01:15,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 80 transitions, 302 flow. Second operand has 6 states, 6 states have (on average 54.833333333333336) internal successors, (329), 6 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:01:15,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:01:15,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 85 [2025-03-04 10:01:15,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:01:16,142 INFO L124 PetriNetUnfolderBase]: 390/948 cut-off events. [2025-03-04 10:01:16,142 INFO L125 PetriNetUnfolderBase]: For 143/143 co-relation queries the response was YES. [2025-03-04 10:01:16,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1774 conditions, 948 events. 390/948 cut-off events. For 143/143 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5235 event pairs, 287 based on Foata normal form. 6/819 useless extension candidates. Maximal degree in co-relation 1703. Up to 604 conditions per place. [2025-03-04 10:01:16,147 INFO L140 encePairwiseOnDemand]: 81/85 looper letters, 52 selfloop transitions, 11 changer transitions 0/99 dead transitions. [2025-03-04 10:01:16,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 99 transitions, 550 flow [2025-03-04 10:01:16,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-04 10:01:16,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-04 10:01:16,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 364 transitions. [2025-03-04 10:01:16,149 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7137254901960784 [2025-03-04 10:01:16,150 INFO L175 Difference]: Start difference. First operand has 93 places, 80 transitions, 302 flow. Second operand 6 states and 364 transitions. [2025-03-04 10:01:16,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 99 transitions, 550 flow [2025-03-04 10:01:16,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 99 transitions, 506 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-04 10:01:16,152 INFO L231 Difference]: Finished difference. Result has 99 places, 85 transitions, 370 flow [2025-03-04 10:01:16,152 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=370, PETRI_PLACES=99, PETRI_TRANSITIONS=85} [2025-03-04 10:01:16,154 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 15 predicate places. [2025-03-04 10:01:16,154 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 85 transitions, 370 flow [2025-03-04 10:01:16,154 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.833333333333336) internal successors, (329), 6 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:01:16,154 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:01:16,154 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:01:16,166 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 10:01:16,354 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 10:01:16,355 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2025-03-04 10:01:16,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:01:16,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1855748326, now seen corresponding path program 1 times [2025-03-04 10:01:16,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:01:16,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1708473323] [2025-03-04 10:01:16,356 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:01:16,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:01:16,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:01:16,357 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 10:01:16,358 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 10:01:16,437 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-04 10:01:16,590 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-04 10:01:16,590 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:01:16,590 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:01:16,611 INFO L256 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-04 10:01:16,614 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:01:16,616 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 10:01:16,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2025-03-04 10:01:16,739 INFO L349 Elim1Store]: treesize reduction 90, result has 30.2 percent of original size [2025-03-04 10:01:16,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 52 [2025-03-04 10:01:16,776 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 10:01:16,815 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 10:01:16,836 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 10:01:16,860 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 10:01:16,895 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:01:16,896 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 10:01:17,000 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_573 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_573) |c_~#c~0.base|) (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|))))))) is different from false [2025-03-04 10:01:17,108 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 10:01:17,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2025-03-04 10:01:17,126 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 10:01:17,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 55 [2025-03-04 10:01:17,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2025-03-04 10:01:26,208 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2025-03-04 10:01:26,208 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:01:26,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708473323] [2025-03-04 10:01:26,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708473323] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 10:01:26,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-04 10:01:26,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2025-03-04 10:01:26,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442284640] [2025-03-04 10:01:26,209 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-04 10:01:26,209 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-04 10:01:26,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:01:26,210 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-04 10:01:26,210 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=211, Unknown=17, NotChecked=30, Total=306 [2025-03-04 10:01:26,293 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 85 [2025-03-04 10:01:26,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 85 transitions, 370 flow. Second operand has 18 states, 18 states have (on average 13.88888888888889) internal successors, (250), 18 states have internal predecessors, (250), 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 10:01:26,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:01:26,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 85 [2025-03-04 10:01:26,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:01:27,640 INFO L124 PetriNetUnfolderBase]: 1518/2695 cut-off events. [2025-03-04 10:01:27,641 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2025-03-04 10:01:27,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5323 conditions, 2695 events. 1518/2695 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 15358 event pairs, 1287 based on Foata normal form. 6/1901 useless extension candidates. Maximal degree in co-relation 5257. Up to 2340 conditions per place. [2025-03-04 10:01:27,657 INFO L140 encePairwiseOnDemand]: 77/85 looper letters, 62 selfloop transitions, 24 changer transitions 0/96 dead transitions. [2025-03-04 10:01:27,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 96 transitions, 582 flow [2025-03-04 10:01:27,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-04 10:01:27,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-04 10:01:27,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 202 transitions. [2025-03-04 10:01:27,660 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2160427807486631 [2025-03-04 10:01:27,660 INFO L175 Difference]: Start difference. First operand has 99 places, 85 transitions, 370 flow. Second operand 11 states and 202 transitions. [2025-03-04 10:01:27,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 96 transitions, 582 flow [2025-03-04 10:01:27,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 96 transitions, 566 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-03-04 10:01:27,662 INFO L231 Difference]: Finished difference. Result has 111 places, 90 transitions, 444 flow [2025-03-04 10:01:27,662 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=444, PETRI_PLACES=111, PETRI_TRANSITIONS=90} [2025-03-04 10:01:27,663 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 27 predicate places. [2025-03-04 10:01:27,663 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 90 transitions, 444 flow [2025-03-04 10:01:27,663 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 13.88888888888889) internal successors, (250), 18 states have internal predecessors, (250), 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 10:01:27,663 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:01:27,663 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:01:27,678 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 10:01:27,863 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 10:01:27,863 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2025-03-04 10:01:27,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:01:27,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1855748325, now seen corresponding path program 1 times [2025-03-04 10:01:27,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:01:27,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [458338246] [2025-03-04 10:01:27,864 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:01:27,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:01:27,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:01:27,866 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 10:01:27,866 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 10:01:27,940 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-04 10:01:28,101 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-04 10:01:28,101 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:01:28,101 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:01:28,124 INFO L256 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-03-04 10:01:28,126 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:01:28,130 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 10:01:28,133 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 10:01:28,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2025-03-04 10:01:28,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2025-03-04 10:01:28,332 INFO L349 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2025-03-04 10:01:28,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 29 [2025-03-04 10:01:28,357 INFO L349 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2025-03-04 10:01:28,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2025-03-04 10:01:28,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2025-03-04 10:01:28,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 27 [2025-03-04 10:01:28,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 27 [2025-03-04 10:01:28,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2025-03-04 10:01:28,440 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 10:01:28,446 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 10:01:28,471 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 10:01:28,495 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:01:28,495 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 10:01:28,711 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|)))) (and (forall ((v_ArrVal_680 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_681 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_680) |c_~#c~0.base|) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_681) |c_~#c~0.base|) .cse0)))) (forall ((v_ArrVal_680 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_680) |c_~#c~0.base|) .cse0))) (bvule (bvadd (_ bv4 32) .cse1) (bvadd (_ bv8 32) .cse1)))))) is different from false [2025-03-04 10:01:29,005 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 10:01:29,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 38 [2025-03-04 10:01:29,018 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 10:01:29,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 55 [2025-03-04 10:01:29,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2025-03-04 10:01:29,068 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 10:01:29,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 49 [2025-03-04 10:01:29,079 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 10:01:29,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 41 [2025-03-04 10:01:29,086 INFO L173 IndexEqualityManager]: detected equality via solver [2025-03-04 10:01:29,097 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 10:01:29,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 41 [2025-03-04 10:01:29,104 INFO L173 IndexEqualityManager]: detected equality via solver [2025-03-04 10:01:29,119 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 10:01:29,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 30 [2025-03-04 10:01:30,518 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2025-03-04 10:01:30,518 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:01:30,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458338246] [2025-03-04 10:01:30,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458338246] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 10:01:30,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-04 10:01:30,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2025-03-04 10:01:30,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537902857] [2025-03-04 10:01:30,518 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-04 10:01:30,518 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-04 10:01:30,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:01:30,519 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-04 10:01:30,519 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=252, Unknown=10, NotChecked=32, Total=342 [2025-03-04 10:01:30,824 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 85 [2025-03-04 10:01:30,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 90 transitions, 444 flow. Second operand has 19 states, 19 states have (on average 7.7894736842105265) internal successors, (148), 19 states have internal predecessors, (148), 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 10:01:30,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:01:30,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 85 [2025-03-04 10:01:30,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:01:34,568 INFO L124 PetriNetUnfolderBase]: 2199/3510 cut-off events. [2025-03-04 10:01:34,568 INFO L125 PetriNetUnfolderBase]: For 168/168 co-relation queries the response was YES. [2025-03-04 10:01:34,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7253 conditions, 3510 events. 2199/3510 cut-off events. For 168/168 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 18368 event pairs, 1920 based on Foata normal form. 6/2096 useless extension candidates. Maximal degree in co-relation 7178. Up to 3399 conditions per place. [2025-03-04 10:01:34,583 INFO L140 encePairwiseOnDemand]: 75/85 looper letters, 65 selfloop transitions, 26 changer transitions 0/95 dead transitions. [2025-03-04 10:01:34,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 95 transitions, 640 flow [2025-03-04 10:01:34,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-04 10:01:34,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-04 10:01:34,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 153 transitions. [2025-03-04 10:01:34,586 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.13846153846153847 [2025-03-04 10:01:34,586 INFO L175 Difference]: Start difference. First operand has 111 places, 90 transitions, 444 flow. Second operand 13 states and 153 transitions. [2025-03-04 10:01:34,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 95 transitions, 640 flow [2025-03-04 10:01:34,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 95 transitions, 610 flow, removed 10 selfloop flow, removed 3 redundant places. [2025-03-04 10:01:34,588 INFO L231 Difference]: Finished difference. Result has 122 places, 92 transitions, 480 flow [2025-03-04 10:01:34,588 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=480, PETRI_PLACES=122, PETRI_TRANSITIONS=92} [2025-03-04 10:01:34,589 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 38 predicate places. [2025-03-04 10:01:34,589 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 92 transitions, 480 flow [2025-03-04 10:01:34,589 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.7894736842105265) internal successors, (148), 19 states have internal predecessors, (148), 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 10:01:34,589 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:01:34,589 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1] [2025-03-04 10:01:34,603 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 10:01:34,789 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 10:01:34,790 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2025-03-04 10:01:34,790 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:01:34,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1144024163, now seen corresponding path program 2 times [2025-03-04 10:01:34,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:01:34,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [609920934] [2025-03-04 10:01:34,791 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 10:01:34,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:01:34,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:01:34,793 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 10:01:34,794 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 10:01:34,897 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-03-04 10:01:35,823 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-03-04 10:01:35,824 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 10:01:35,824 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:01:35,853 INFO L256 TraceCheckSpWp]: Trace formula consists of 830 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-04 10:01:35,855 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:01:35,903 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:01:35,903 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 10:01:35,983 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:01:35,984 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:01:35,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609920934] [2025-03-04 10:01:35,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609920934] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 10:01:35,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-04 10:01:35,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2025-03-04 10:01:35,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333690319] [2025-03-04 10:01:35,984 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-04 10:01:35,984 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-04 10:01:35,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:01:35,984 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-04 10:01:35,984 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2025-03-04 10:01:35,985 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 85 [2025-03-04 10:01:35,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 92 transitions, 480 flow. Second operand has 12 states, 12 states have (on average 55.916666666666664) internal successors, (671), 12 states have internal predecessors, (671), 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 10:01:35,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:01:35,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 85 [2025-03-04 10:01:35,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:01:36,700 INFO L124 PetriNetUnfolderBase]: 390/1056 cut-off events. [2025-03-04 10:01:36,701 INFO L125 PetriNetUnfolderBase]: For 531/531 co-relation queries the response was YES. [2025-03-04 10:01:36,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2340 conditions, 1056 events. 390/1056 cut-off events. For 531/531 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5212 event pairs, 287 based on Foata normal form. 12/940 useless extension candidates. Maximal degree in co-relation 2266. Up to 604 conditions per place. [2025-03-04 10:01:36,705 INFO L140 encePairwiseOnDemand]: 81/85 looper letters, 82 selfloop transitions, 23 changer transitions 0/144 dead transitions. [2025-03-04 10:01:36,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 144 transitions, 1206 flow [2025-03-04 10:01:36,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-04 10:01:36,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-04 10:01:36,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 709 transitions. [2025-03-04 10:01:36,707 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6950980392156862 [2025-03-04 10:01:36,707 INFO L175 Difference]: Start difference. First operand has 122 places, 92 transitions, 480 flow. Second operand 12 states and 709 transitions. [2025-03-04 10:01:36,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 144 transitions, 1206 flow [2025-03-04 10:01:36,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 144 transitions, 1054 flow, removed 0 selfloop flow, removed 10 redundant places. [2025-03-04 10:01:36,711 INFO L231 Difference]: Finished difference. Result has 130 places, 105 transitions, 687 flow [2025-03-04 10:01:36,711 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=687, PETRI_PLACES=130, PETRI_TRANSITIONS=105} [2025-03-04 10:01:36,711 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 46 predicate places. [2025-03-04 10:01:36,711 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 105 transitions, 687 flow [2025-03-04 10:01:36,712 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 55.916666666666664) internal successors, (671), 12 states have internal predecessors, (671), 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 10:01:36,712 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:01:36,712 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1] [2025-03-04 10:01:36,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-03-04 10:01:36,912 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 10:01:36,913 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2025-03-04 10:01:36,913 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:01:36,913 INFO L85 PathProgramCache]: Analyzing trace with hash 898327139, now seen corresponding path program 3 times [2025-03-04 10:01:36,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:01:36,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1278774628] [2025-03-04 10:01:36,914 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 10:01:36,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:01:36,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:01:36,916 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 10:01:36,917 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 10:01:37,126 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 97 statements into 11 equivalence classes.