./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_91-arrayloop2_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 798a7b37 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/goblint-regression/28-race_reach_91-arrayloop2_racefree.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 ac583c9331a2ad916f4c22969f16915d9226d22c75c23a992e6ef02ec672d4b3 --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-04 10:04:36,273 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-04 10:04:36,327 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-04 10:04:36,334 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-04 10:04:36,337 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-04 10:04:36,359 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-04 10:04:36,360 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-04 10:04:36,360 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-04 10:04:36,361 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-04 10:04:36,361 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-04 10:04:36,361 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-04 10:04:36,362 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-04 10:04:36,362 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-04 10:04:36,362 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-04 10:04:36,362 INFO L153 SettingsManager]: * Use SBE=true [2025-03-04 10:04:36,362 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-04 10:04:36,363 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-04 10:04:36,363 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-04 10:04:36,363 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-04 10:04:36,363 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-04 10:04:36,363 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-04 10:04:36,363 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-04 10:04:36,363 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-04 10:04:36,363 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-04 10:04:36,363 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-04 10:04:36,363 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-04 10:04:36,364 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-04 10:04:36,364 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-04 10:04:36,364 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-04 10:04:36,364 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-04 10:04:36,364 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-04 10:04:36,364 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-04 10:04:36,364 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-04 10:04:36,365 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 10:04:36,365 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-04 10:04:36,365 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-04 10:04:36,365 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-04 10:04:36,365 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-04 10:04:36,365 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-04 10:04:36,365 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-04 10:04:36,365 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-04 10:04:36,365 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-04 10:04:36,365 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 -> ac583c9331a2ad916f4c22969f16915d9226d22c75c23a992e6ef02ec672d4b3 [2025-03-04 10:04:36,600 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-04 10:04:36,609 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-04 10:04:36,611 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-04 10:04:36,613 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-04 10:04:36,613 INFO L274 PluginConnector]: CDTParser initialized [2025-03-04 10:04:36,614 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_91-arrayloop2_racefree.i [2025-03-04 10:04:37,765 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff9bbb2ad/a66c255d2b1549749a7b25ab8d0f34af/FLAG66aa259c2 [2025-03-04 10:04:38,067 INFO L384 CDTParser]: Found 1 translation units. [2025-03-04 10:04:38,068 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_91-arrayloop2_racefree.i [2025-03-04 10:04:38,087 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff9bbb2ad/a66c255d2b1549749a7b25ab8d0f34af/FLAG66aa259c2 [2025-03-04 10:04:38,339 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff9bbb2ad/a66c255d2b1549749a7b25ab8d0f34af [2025-03-04 10:04:38,341 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-04 10:04:38,342 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-04 10:04:38,343 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-04 10:04:38,343 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-04 10:04:38,346 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-04 10:04:38,346 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 10:04:38" (1/1) ... [2025-03-04 10:04:38,347 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@aac1a9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:38, skipping insertion in model container [2025-03-04 10:04:38,347 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 10:04:38" (1/1) ... [2025-03-04 10:04:38,379 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-04 10:04:38,624 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:38,625 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:38,625 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:38,626 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:38,647 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 10:04:38,675 ERROR L321 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2025-03-04 10:04:38,676 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1dc2481b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:38, skipping insertion in model container [2025-03-04 10:04:38,676 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-04 10:04:38,676 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2025-03-04 10:04:38,677 INFO L158 Benchmark]: Toolchain (without parser) took 334.88ms. Allocated memory is still 142.6MB. Free memory was 111.3MB in the beginning and 94.4MB in the end (delta: 16.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-03-04 10:04:38,677 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 201.3MB. Free memory is still 123.5MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-04 10:04:38,678 INFO L158 Benchmark]: CACSL2BoogieTranslator took 333.15ms. Allocated memory is still 142.6MB. Free memory was 110.8MB in the beginning and 94.4MB in the end (delta: 16.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-03-04 10:04:38,678 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 201.3MB. Free memory is still 123.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 333.15ms. Allocated memory is still 142.6MB. Free memory was 110.8MB in the beginning and 94.4MB in the end (delta: 16.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1044]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/goblint-regression/28-race_reach_91-arrayloop2_racefree.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 ac583c9331a2ad916f4c22969f16915d9226d22c75c23a992e6ef02ec672d4b3 --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-04 10:04:40,306 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-04 10:04:40,379 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2025-03-04 10:04:40,383 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-04 10:04:40,383 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-04 10:04:40,403 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-04 10:04:40,404 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-04 10:04:40,404 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-04 10:04:40,404 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-04 10:04:40,404 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-04 10:04:40,405 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-04 10:04:40,405 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-04 10:04:40,405 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-04 10:04:40,405 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-04 10:04:40,405 INFO L153 SettingsManager]: * Use SBE=true [2025-03-04 10:04:40,405 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-04 10:04:40,406 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-04 10:04:40,406 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-04 10:04:40,406 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-04 10:04:40,406 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-04 10:04:40,406 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-04 10:04:40,406 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-04 10:04:40,406 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-04 10:04:40,406 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-04 10:04:40,407 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-04 10:04:40,407 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2025-03-04 10:04:40,407 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2025-03-04 10:04:40,407 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-04 10:04:40,407 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-04 10:04:40,407 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-04 10:04:40,407 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-04 10:04:40,408 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-04 10:04:40,408 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-04 10:04:40,408 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-04 10:04:40,408 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-04 10:04:40,408 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 10:04:40,408 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-04 10:04:40,408 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-04 10:04:40,408 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2025-03-04 10:04:40,408 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2025-03-04 10:04:40,408 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-04 10:04:40,409 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-04 10:04:40,409 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-04 10:04:40,409 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-04 10:04:40,409 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 -> ac583c9331a2ad916f4c22969f16915d9226d22c75c23a992e6ef02ec672d4b3 [2025-03-04 10:04:40,627 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-04 10:04:40,632 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-04 10:04:40,634 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-04 10:04:40,635 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-04 10:04:40,636 INFO L274 PluginConnector]: CDTParser initialized [2025-03-04 10:04:40,637 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_91-arrayloop2_racefree.i [2025-03-04 10:04:41,799 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f61d0aa3d/a1aff93c87ef48bb8658603730bd296e/FLAG6cf276767 [2025-03-04 10:04:42,062 INFO L384 CDTParser]: Found 1 translation units. [2025-03-04 10:04:42,062 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_91-arrayloop2_racefree.i [2025-03-04 10:04:42,081 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f61d0aa3d/a1aff93c87ef48bb8658603730bd296e/FLAG6cf276767 [2025-03-04 10:04:42,095 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f61d0aa3d/a1aff93c87ef48bb8658603730bd296e [2025-03-04 10:04:42,097 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-04 10:04:42,100 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-04 10:04:42,101 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-04 10:04:42,101 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-04 10:04:42,104 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-04 10:04:42,105 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 10:04:42" (1/1) ... [2025-03-04 10:04:42,107 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@198bf93f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:42, skipping insertion in model container [2025-03-04 10:04:42,107 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 10:04:42" (1/1) ... [2025-03-04 10:04:42,141 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-04 10:04:42,499 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:42,500 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:42,500 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:42,500 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:42,523 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 10:04:42,556 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2025-03-04 10:04:42,565 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-04 10:04:42,596 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:42,596 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:42,596 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:42,596 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:42,603 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 10:04:42,620 INFO L200 MainTranslator]: Completed pre-run [2025-03-04 10:04:42,649 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:42,649 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:42,650 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:42,650 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:42,657 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 10:04:42,709 INFO L204 MainTranslator]: Completed translation [2025-03-04 10:04:42,710 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:42 WrapperNode [2025-03-04 10:04:42,711 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-04 10:04:42,712 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-04 10:04:42,713 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-04 10:04:42,713 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-04 10:04:42,717 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:42" (1/1) ... [2025-03-04 10:04:42,732 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:42" (1/1) ... [2025-03-04 10:04:42,758 INFO L138 Inliner]: procedures = 283, calls = 120, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 241 [2025-03-04 10:04:42,759 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-04 10:04:42,759 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-04 10:04:42,759 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-04 10:04:42,759 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-04 10:04:42,765 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:42" (1/1) ... [2025-03-04 10:04:42,766 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:42" (1/1) ... [2025-03-04 10:04:42,772 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:42" (1/1) ... [2025-03-04 10:04:42,788 INFO L175 MemorySlicer]: Split 96 memory accesses to 4 slices as follows [2, 5, 2, 87]. 91 percent of accesses are in the largest equivalence class. The 77 initializations are split as follows [2, 5, 0, 70]. The 12 writes are split as follows [0, 0, 1, 11]. [2025-03-04 10:04:42,789 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:42" (1/1) ... [2025-03-04 10:04:42,789 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:42" (1/1) ... [2025-03-04 10:04:42,812 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:42" (1/1) ... [2025-03-04 10:04:42,813 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:42" (1/1) ... [2025-03-04 10:04:42,816 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:42" (1/1) ... [2025-03-04 10:04:42,818 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:42" (1/1) ... [2025-03-04 10:04:42,822 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-04 10:04:42,823 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-04 10:04:42,823 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-04 10:04:42,823 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-04 10:04:42,824 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:42" (1/1) ... [2025-03-04 10:04:42,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 10:04:42,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:04:42,847 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-04 10:04:42,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-04 10:04:42,867 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2025-03-04 10:04:42,867 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2025-03-04 10:04:42,867 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2025-03-04 10:04:42,867 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2025-03-04 10:04:42,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-04 10:04:42,867 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-03-04 10:04:42,867 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2025-03-04 10:04:42,867 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2025-03-04 10:04:42,867 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2025-03-04 10:04:42,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-04 10:04:42,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2025-03-04 10:04:42,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2025-03-04 10:04:42,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2025-03-04 10:04:42,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2025-03-04 10:04:42,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2025-03-04 10:04:42,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2025-03-04 10:04:42,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2025-03-04 10:04:42,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2025-03-04 10:04:42,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2025-03-04 10:04:42,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2025-03-04 10:04:42,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2025-03-04 10:04:42,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2025-03-04 10:04:42,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#0 [2025-03-04 10:04:42,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#1 [2025-03-04 10:04:42,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#2 [2025-03-04 10:04:42,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#3 [2025-03-04 10:04:42,888 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-03-04 10:04:42,888 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-03-04 10:04:42,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-04 10:04:42,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-04 10:04:42,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-03-04 10:04:42,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2025-03-04 10:04:42,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2025-03-04 10:04:42,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2025-03-04 10:04:42,888 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2025-03-04 10:04:42,888 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2025-03-04 10:04:42,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-04 10:04:42,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-04 10:04:42,889 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-04 10:04:43,039 INFO L256 CfgBuilder]: Building ICFG [2025-03-04 10:04:43,040 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-04 10:04:43,511 INFO L1325 $ProcedureCfgBuilder]: dead code at ProgramPoint L1061: havoc main_~#t_ids~0#1.base, main_~#t_ids~0#1.offset; [2025-03-04 10:04:43,511 INFO L1325 $ProcedureCfgBuilder]: dead code at ProgramPoint L1061-1: SUMMARY for call ULTIMATE.dealloc(main_~#t_ids~0#1.base, main_~#t_ids~0#1.offset); srcloc: null [2025-03-04 10:04:43,642 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-04 10:04:43,642 INFO L307 CfgBuilder]: Performing block encoding [2025-03-04 10:04:44,899 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-04 10:04:44,899 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-04 10:04:44,899 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 10:04:44 BoogieIcfgContainer [2025-03-04 10:04:44,899 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-04 10:04:44,901 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-04 10:04:44,901 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-04 10:04:44,906 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-04 10:04:44,906 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.03 10:04:42" (1/3) ... [2025-03-04 10:04:44,906 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66826f64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 10:04:44, skipping insertion in model container [2025-03-04 10:04:44,906 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:42" (2/3) ... [2025-03-04 10:04:44,906 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66826f64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 10:04:44, skipping insertion in model container [2025-03-04 10:04:44,906 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 10:04:44" (3/3) ... [2025-03-04 10:04:44,908 INFO L128 eAbstractionObserver]: Analyzing ICFG 28-race_reach_91-arrayloop2_racefree.i [2025-03-04 10:04:44,919 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-04 10:04:44,921 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 28-race_reach_91-arrayloop2_racefree.i that has 2 procedures, 102 locations, 1 initial locations, 10 loop locations, and 40 error locations. [2025-03-04 10:04:44,921 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-04 10:04:44,990 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2025-03-04 10:04:45,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 120 transitions, 247 flow [2025-03-04 10:04:45,071 INFO L124 PetriNetUnfolderBase]: 18/132 cut-off events. [2025-03-04 10:04:45,075 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-03-04 10:04:45,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137 conditions, 132 events. 18/132 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 503 event pairs, 0 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 81. Up to 4 conditions per place. [2025-03-04 10:04:45,079 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 120 transitions, 247 flow [2025-03-04 10:04:45,083 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 120 transitions, 247 flow [2025-03-04 10:04:45,092 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-04 10:04:45,102 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;@13cb80e6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-04 10:04:45,103 INFO L334 AbstractCegarLoop]: Starting to check reachability of 56 error locations. [2025-03-04 10:04:45,131 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-04 10:04:45,131 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2025-03-04 10:04:45,132 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-04 10:04:45,132 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:04:45,133 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-04 10:04:45,133 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2025-03-04 10:04:45,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:04:45,138 INFO L85 PathProgramCache]: Analyzing trace with hash 664047, now seen corresponding path program 1 times [2025-03-04 10:04:45,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:04:45,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [929667758] [2025-03-04 10:04:45,149 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:04:45,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:45,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:04:45,152 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:04:45,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-04 10:04:45,252 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-04 10:04:45,372 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-04 10:04:45,373 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:04:45,373 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:04:45,391 INFO L256 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-04 10:04:45,395 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:04:45,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:04:45,456 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:04:45,457 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:04:45,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929667758] [2025-03-04 10:04:45,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929667758] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:04:45,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:04:45,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-04 10:04:45,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437742847] [2025-03-04 10:04:45,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:04:45,465 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 10:04:45,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:04:45,489 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 10:04:45,489 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 10:04:45,643 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 120 [2025-03-04 10:04:45,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 120 transitions, 247 flow. Second operand has 4 states, 4 states have (on average 62.75) internal successors, (251), 4 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:45,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:04:45,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 120 [2025-03-04 10:04:45,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:04:45,972 INFO L124 PetriNetUnfolderBase]: 120/445 cut-off events. [2025-03-04 10:04:45,972 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-04 10:04:45,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 710 conditions, 445 events. 120/445 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2349 event pairs, 61 based on Foata normal form. 47/409 useless extension candidates. Maximal degree in co-relation 636. Up to 167 conditions per place. [2025-03-04 10:04:45,976 INFO L140 encePairwiseOnDemand]: 101/120 looper letters, 61 selfloop transitions, 4 changer transitions 0/127 dead transitions. [2025-03-04 10:04:45,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 127 transitions, 391 flow [2025-03-04 10:04:45,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 10:04:45,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 10:04:45,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 340 transitions. [2025-03-04 10:04:45,987 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7083333333333334 [2025-03-04 10:04:45,989 INFO L175 Difference]: Start difference. First operand has 105 places, 120 transitions, 247 flow. Second operand 4 states and 340 transitions. [2025-03-04 10:04:45,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 127 transitions, 391 flow [2025-03-04 10:04:45,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 127 transitions, 391 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-04 10:04:45,997 INFO L231 Difference]: Finished difference. Result has 106 places, 105 transitions, 231 flow [2025-03-04 10:04:46,000 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=231, PETRI_PLACES=106, PETRI_TRANSITIONS=105} [2025-03-04 10:04:46,002 INFO L279 CegarLoopForPetriNet]: 105 programPoint places, 1 predicate places. [2025-03-04 10:04:46,003 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 105 transitions, 231 flow [2025-03-04 10:04:46,003 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.75) internal successors, (251), 4 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:46,003 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:04:46,003 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-04 10:04:46,015 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 10:04:46,208 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:46,208 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2025-03-04 10:04:46,209 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:04:46,209 INFO L85 PathProgramCache]: Analyzing trace with hash 664048, now seen corresponding path program 1 times [2025-03-04 10:04:46,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:04:46,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1463073265] [2025-03-04 10:04:46,209 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:04:46,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:46,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:04:46,211 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:04:46,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-04 10:04:46,290 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-04 10:04:46,419 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-04 10:04:46,420 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:04:46,420 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:04:46,435 INFO L256 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-04 10:04:46,436 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:04:46,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:04:46,490 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:04:46,491 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:04:46,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463073265] [2025-03-04 10:04:46,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463073265] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:04:46,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:04:46,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-04 10:04:46,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582890031] [2025-03-04 10:04:46,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:04:46,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 10:04:46,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:04:46,492 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 10:04:46,492 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 10:04:46,631 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 120 [2025-03-04 10:04:46,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 105 transitions, 231 flow. Second operand has 4 states, 4 states have (on average 63.75) internal successors, (255), 4 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:46,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:04:46,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 120 [2025-03-04 10:04:46,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:04:46,889 INFO L124 PetriNetUnfolderBase]: 122/493 cut-off events. [2025-03-04 10:04:46,889 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2025-03-04 10:04:46,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 816 conditions, 493 events. 122/493 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2553 event pairs, 100 based on Foata normal form. 3/405 useless extension candidates. Maximal degree in co-relation 720. Up to 260 conditions per place. [2025-03-04 10:04:46,895 INFO L140 encePairwiseOnDemand]: 112/120 looper letters, 43 selfloop transitions, 5 changer transitions 0/109 dead transitions. [2025-03-04 10:04:46,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 109 transitions, 341 flow [2025-03-04 10:04:46,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 10:04:46,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 10:04:46,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 303 transitions. [2025-03-04 10:04:46,899 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.63125 [2025-03-04 10:04:46,899 INFO L175 Difference]: Start difference. First operand has 106 places, 105 transitions, 231 flow. Second operand 4 states and 303 transitions. [2025-03-04 10:04:46,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 109 transitions, 341 flow [2025-03-04 10:04:46,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 109 transitions, 329 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-04 10:04:46,904 INFO L231 Difference]: Finished difference. Result has 108 places, 109 transitions, 264 flow [2025-03-04 10:04:46,905 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=264, PETRI_PLACES=108, PETRI_TRANSITIONS=109} [2025-03-04 10:04:46,905 INFO L279 CegarLoopForPetriNet]: 105 programPoint places, 3 predicate places. [2025-03-04 10:04:46,906 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 109 transitions, 264 flow [2025-03-04 10:04:46,906 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.75) internal successors, (255), 4 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:46,906 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:04:46,906 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-03-04 10:04:46,918 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-04 10:04:47,106 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:47,107 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2025-03-04 10:04:47,107 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:04:47,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1691601940, now seen corresponding path program 1 times [2025-03-04 10:04:47,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:04:47,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1614749599] [2025-03-04 10:04:47,109 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:04:47,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:47,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:04:47,111 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:04:47,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-04 10:04:47,195 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-04 10:04:47,309 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-04 10:04:47,309 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:04:47,309 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:04:47,326 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-04 10:04:47,328 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:04:47,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2025-03-04 10:04:47,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:04:47,350 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:04:47,350 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:04:47,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614749599] [2025-03-04 10:04:47,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614749599] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:04:47,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:04:47,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-04 10:04:47,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185077493] [2025-03-04 10:04:47,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:04:47,351 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-04 10:04:47,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:04:47,351 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-04 10:04:47,351 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 10:04:47,422 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 120 [2025-03-04 10:04:47,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 109 transitions, 264 flow. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:47,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:04:47,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 120 [2025-03-04 10:04:47,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:04:47,612 INFO L124 PetriNetUnfolderBase]: 122/492 cut-off events. [2025-03-04 10:04:47,612 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2025-03-04 10:04:47,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 802 conditions, 492 events. 122/492 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2544 event pairs, 100 based on Foata normal form. 0/400 useless extension candidates. Maximal degree in co-relation 769. Up to 256 conditions per place. [2025-03-04 10:04:47,615 INFO L140 encePairwiseOnDemand]: 117/120 looper letters, 41 selfloop transitions, 3 changer transitions 0/108 dead transitions. [2025-03-04 10:04:47,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 108 transitions, 350 flow [2025-03-04 10:04:47,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-04 10:04:47,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-04 10:04:47,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 239 transitions. [2025-03-04 10:04:47,617 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6638888888888889 [2025-03-04 10:04:47,617 INFO L175 Difference]: Start difference. First operand has 108 places, 109 transitions, 264 flow. Second operand 3 states and 239 transitions. [2025-03-04 10:04:47,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 108 transitions, 350 flow [2025-03-04 10:04:47,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 108 transitions, 347 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-04 10:04:47,619 INFO L231 Difference]: Finished difference. Result has 108 places, 108 transitions, 265 flow [2025-03-04 10:04:47,619 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=265, PETRI_PLACES=108, PETRI_TRANSITIONS=108} [2025-03-04 10:04:47,619 INFO L279 CegarLoopForPetriNet]: 105 programPoint places, 3 predicate places. [2025-03-04 10:04:47,619 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 108 transitions, 265 flow [2025-03-04 10:04:47,620 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:47,620 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:04:47,620 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-03-04 10:04:47,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-04 10:04:47,820 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:47,820 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2025-03-04 10:04:47,821 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:04:47,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1691601939, now seen corresponding path program 1 times [2025-03-04 10:04:47,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:04:47,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [457812315] [2025-03-04 10:04:47,822 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:04:47,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:47,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:04:47,823 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:04:47,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-04 10:04:47,893 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-04 10:04:48,016 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-04 10:04:48,016 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:04:48,016 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:04:48,035 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-04 10:04:48,036 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:04:48,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-04 10:04:48,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:04:48,053 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:04:48,053 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:04:48,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457812315] [2025-03-04 10:04:48,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457812315] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:04:48,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:04:48,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-04 10:04:48,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796010212] [2025-03-04 10:04:48,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:04:48,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-04 10:04:48,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:04:48,054 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-04 10:04:48,054 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 10:04:48,154 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 120 [2025-03-04 10:04:48,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 108 transitions, 265 flow. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:48,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:04:48,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 120 [2025-03-04 10:04:48,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:04:48,330 INFO L124 PetriNetUnfolderBase]: 122/491 cut-off events. [2025-03-04 10:04:48,333 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2025-03-04 10:04:48,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 802 conditions, 491 events. 122/491 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2528 event pairs, 100 based on Foata normal form. 0/401 useless extension candidates. Maximal degree in co-relation 768. Up to 256 conditions per place. [2025-03-04 10:04:48,340 INFO L140 encePairwiseOnDemand]: 117/120 looper letters, 41 selfloop transitions, 3 changer transitions 0/107 dead transitions. [2025-03-04 10:04:48,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 107 transitions, 351 flow [2025-03-04 10:04:48,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-04 10:04:48,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-04 10:04:48,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 239 transitions. [2025-03-04 10:04:48,341 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6638888888888889 [2025-03-04 10:04:48,341 INFO L175 Difference]: Start difference. First operand has 108 places, 108 transitions, 265 flow. Second operand 3 states and 239 transitions. [2025-03-04 10:04:48,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 107 transitions, 351 flow [2025-03-04 10:04:48,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 107 transitions, 345 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-04 10:04:48,344 INFO L231 Difference]: Finished difference. Result has 107 places, 107 transitions, 263 flow [2025-03-04 10:04:48,344 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=263, PETRI_PLACES=107, PETRI_TRANSITIONS=107} [2025-03-04 10:04:48,344 INFO L279 CegarLoopForPetriNet]: 105 programPoint places, 2 predicate places. [2025-03-04 10:04:48,344 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 107 transitions, 263 flow [2025-03-04 10:04:48,345 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:48,345 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:04:48,345 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:04:48,360 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-04 10:04:48,546 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:48,547 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2025-03-04 10:04:48,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:04:48,547 INFO L85 PathProgramCache]: Analyzing trace with hash -900051916, now seen corresponding path program 1 times [2025-03-04 10:04:48,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:04:48,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1002043392] [2025-03-04 10:04:48,548 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:04:48,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:48,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:04:48,550 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:04:48,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-04 10:04:48,617 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-04 10:04:48,729 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-04 10:04:48,730 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:04:48,730 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:04:48,746 INFO L256 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-04 10:04:48,747 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:04:48,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2025-03-04 10:04:48,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:04:48,763 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:04:48,763 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:04:48,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002043392] [2025-03-04 10:04:48,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002043392] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:04:48,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:04:48,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 10:04:48,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086347707] [2025-03-04 10:04:48,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:04:48,764 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 10:04:48,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:04:48,764 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 10:04:48,764 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 10:04:48,900 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 120 [2025-03-04 10:04:48,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 107 transitions, 263 flow. Second operand has 4 states, 4 states have (on average 61.75) internal successors, (247), 4 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 10:04:48,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:04:48,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 120 [2025-03-04 10:04:48,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:04:49,141 INFO L124 PetriNetUnfolderBase]: 122/489 cut-off events. [2025-03-04 10:04:49,141 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2025-03-04 10:04:49,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 803 conditions, 489 events. 122/489 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2518 event pairs, 100 based on Foata normal form. 1/403 useless extension candidates. Maximal degree in co-relation 768. Up to 256 conditions per place. [2025-03-04 10:04:49,144 INFO L140 encePairwiseOnDemand]: 113/120 looper letters, 39 selfloop transitions, 7 changer transitions 0/105 dead transitions. [2025-03-04 10:04:49,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 105 transitions, 351 flow [2025-03-04 10:04:49,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-04 10:04:49,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-04 10:04:49,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 344 transitions. [2025-03-04 10:04:49,146 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5733333333333334 [2025-03-04 10:04:49,146 INFO L175 Difference]: Start difference. First operand has 107 places, 107 transitions, 263 flow. Second operand 5 states and 344 transitions. [2025-03-04 10:04:49,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 105 transitions, 351 flow [2025-03-04 10:04:49,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 105 transitions, 345 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-04 10:04:49,148 INFO L231 Difference]: Finished difference. Result has 107 places, 105 transitions, 267 flow [2025-03-04 10:04:49,148 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=267, PETRI_PLACES=107, PETRI_TRANSITIONS=105} [2025-03-04 10:04:49,148 INFO L279 CegarLoopForPetriNet]: 105 programPoint places, 2 predicate places. [2025-03-04 10:04:49,148 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 105 transitions, 267 flow [2025-03-04 10:04:49,151 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.75) internal successors, (247), 4 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 10:04:49,151 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:04:49,151 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:04:49,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-04 10:04:49,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:49,352 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2025-03-04 10:04:49,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:04:49,352 INFO L85 PathProgramCache]: Analyzing trace with hash -900051915, now seen corresponding path program 1 times [2025-03-04 10:04:49,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:04:49,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [835020486] [2025-03-04 10:04:49,353 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:04:49,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:49,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:04:49,356 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:04:49,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-04 10:04:49,419 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-04 10:04:49,546 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-04 10:04:49,546 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:04:49,546 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:04:49,563 INFO L256 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-04 10:04:49,564 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:04:49,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-04 10:04:49,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:04:49,586 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:04:49,586 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:04:49,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835020486] [2025-03-04 10:04:49,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835020486] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:04:49,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:04:49,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 10:04:49,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124601232] [2025-03-04 10:04:49,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:04:49,587 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 10:04:49,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:04:49,587 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 10:04:49,587 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 10:04:49,756 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 120 [2025-03-04 10:04:49,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 105 transitions, 267 flow. Second operand has 4 states, 4 states have (on average 63.5) internal successors, (254), 4 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:49,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:04:49,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 120 [2025-03-04 10:04:49,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:04:49,960 INFO L124 PetriNetUnfolderBase]: 122/487 cut-off events. [2025-03-04 10:04:49,961 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2025-03-04 10:04:49,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 805 conditions, 487 events. 122/487 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2503 event pairs, 100 based on Foata normal form. 2/402 useless extension candidates. Maximal degree in co-relation 766. Up to 258 conditions per place. [2025-03-04 10:04:49,962 INFO L140 encePairwiseOnDemand]: 115/120 looper letters, 42 selfloop transitions, 4 changer transitions 0/103 dead transitions. [2025-03-04 10:04:49,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 103 transitions, 355 flow [2025-03-04 10:04:49,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 10:04:49,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 10:04:49,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 292 transitions. [2025-03-04 10:04:49,964 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6083333333333333 [2025-03-04 10:04:49,964 INFO L175 Difference]: Start difference. First operand has 107 places, 105 transitions, 267 flow. Second operand 4 states and 292 transitions. [2025-03-04 10:04:49,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 103 transitions, 355 flow [2025-03-04 10:04:49,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 103 transitions, 341 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-04 10:04:49,965 INFO L231 Difference]: Finished difference. Result has 104 places, 103 transitions, 257 flow [2025-03-04 10:04:49,966 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=257, PETRI_PLACES=104, PETRI_TRANSITIONS=103} [2025-03-04 10:04:49,966 INFO L279 CegarLoopForPetriNet]: 105 programPoint places, -1 predicate places. [2025-03-04 10:04:49,966 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 103 transitions, 257 flow [2025-03-04 10:04:49,966 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.5) internal successors, (254), 4 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:49,966 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:04:49,966 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2025-03-04 10:04:49,981 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-04 10:04:50,171 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:50,171 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2025-03-04 10:04:50,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:04:50,171 INFO L85 PathProgramCache]: Analyzing trace with hash -900051754, now seen corresponding path program 1 times [2025-03-04 10:04:50,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:04:50,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1801237664] [2025-03-04 10:04:50,172 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:04:50,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:50,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:04:50,174 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:04:50,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-04 10:04:50,234 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-04 10:04:50,334 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-04 10:04:50,335 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:04:50,335 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:04:50,349 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-03-04 10:04:50,350 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:04:50,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:04:50,355 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:04:50,355 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:04:50,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801237664] [2025-03-04 10:04:50,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801237664] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:04:50,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:04:50,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 10:04:50,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872250316] [2025-03-04 10:04:50,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:04:50,356 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-04 10:04:50,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:04:50,356 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-04 10:04:50,356 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 10:04:50,356 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 120 [2025-03-04 10:04:50,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 103 transitions, 257 flow. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:50,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:04:50,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 120 [2025-03-04 10:04:50,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:04:50,500 INFO L124 PetriNetUnfolderBase]: 121/505 cut-off events. [2025-03-04 10:04:50,500 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2025-03-04 10:04:50,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 824 conditions, 505 events. 121/505 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2533 event pairs, 100 based on Foata normal form. 2/412 useless extension candidates. Maximal degree in co-relation 793. Up to 256 conditions per place. [2025-03-04 10:04:50,503 INFO L140 encePairwiseOnDemand]: 117/120 looper letters, 45 selfloop transitions, 3 changer transitions 0/107 dead transitions. [2025-03-04 10:04:50,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 107 transitions, 367 flow [2025-03-04 10:04:50,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-04 10:04:50,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-04 10:04:50,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 247 transitions. [2025-03-04 10:04:50,504 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6861111111111111 [2025-03-04 10:04:50,504 INFO L175 Difference]: Start difference. First operand has 104 places, 103 transitions, 257 flow. Second operand 3 states and 247 transitions. [2025-03-04 10:04:50,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 107 transitions, 367 flow [2025-03-04 10:04:50,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 107 transitions, 353 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-04 10:04:50,506 INFO L231 Difference]: Finished difference. Result has 104 places, 103 transitions, 260 flow [2025-03-04 10:04:50,506 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=260, PETRI_PLACES=104, PETRI_TRANSITIONS=103} [2025-03-04 10:04:50,507 INFO L279 CegarLoopForPetriNet]: 105 programPoint places, -1 predicate places. [2025-03-04 10:04:50,507 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 103 transitions, 260 flow [2025-03-04 10:04:50,507 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:50,507 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:04:50,507 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:04:50,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-04 10:04:50,714 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:50,714 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2025-03-04 10:04:50,714 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:04:50,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1661445925, now seen corresponding path program 1 times [2025-03-04 10:04:50,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:04:50,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1397369920] [2025-03-04 10:04:50,715 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:04:50,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:50,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:04:50,717 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:04:50,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-04 10:04:50,782 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-04 10:04:50,910 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-04 10:04:50,910 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:04:50,910 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:04:50,927 INFO L256 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-04 10:04:50,928 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:04:50,969 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2025-03-04 10:04:50,969 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 10:04:50,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:04:50,989 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:04:50,989 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:04:50,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397369920] [2025-03-04 10:04:50,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397369920] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:04:50,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:04:50,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-04 10:04:50,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898587362] [2025-03-04 10:04:50,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:04:50,990 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 10:04:50,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:04:50,990 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 10:04:50,990 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 10:04:51,099 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 120 [2025-03-04 10:04:51,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 103 transitions, 260 flow. Second operand has 4 states, 4 states have (on average 65.75) internal successors, (263), 4 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:51,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:04:51,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 120 [2025-03-04 10:04:51,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:04:51,292 INFO L124 PetriNetUnfolderBase]: 120/458 cut-off events. [2025-03-04 10:04:51,292 INFO L125 PetriNetUnfolderBase]: For 31/32 co-relation queries the response was YES. [2025-03-04 10:04:51,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 780 conditions, 458 events. 120/458 cut-off events. For 31/32 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2261 event pairs, 61 based on Foata normal form. 3/381 useless extension candidates. Maximal degree in co-relation 747. Up to 170 conditions per place. [2025-03-04 10:04:51,293 INFO L140 encePairwiseOnDemand]: 114/120 looper letters, 62 selfloop transitions, 5 changer transitions 0/123 dead transitions. [2025-03-04 10:04:51,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 123 transitions, 434 flow [2025-03-04 10:04:51,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 10:04:51,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 10:04:51,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 321 transitions. [2025-03-04 10:04:51,296 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.66875 [2025-03-04 10:04:51,296 INFO L175 Difference]: Start difference. First operand has 104 places, 103 transitions, 260 flow. Second operand 4 states and 321 transitions. [2025-03-04 10:04:51,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 123 transitions, 434 flow [2025-03-04 10:04:51,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 123 transitions, 431 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-04 10:04:51,298 INFO L231 Difference]: Finished difference. Result has 104 places, 101 transitions, 263 flow [2025-03-04 10:04:51,298 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=263, PETRI_PLACES=104, PETRI_TRANSITIONS=101} [2025-03-04 10:04:51,298 INFO L279 CegarLoopForPetriNet]: 105 programPoint places, -1 predicate places. [2025-03-04 10:04:51,298 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 101 transitions, 263 flow [2025-03-04 10:04:51,300 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.75) internal successors, (263), 4 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:51,300 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:04:51,300 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:04:51,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-04 10:04:51,500 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:51,501 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2025-03-04 10:04:51,501 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:04:51,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1661445924, now seen corresponding path program 1 times [2025-03-04 10:04:51,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:04:51,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [60106235] [2025-03-04 10:04:51,501 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:04:51,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:51,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:04:51,503 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:04:51,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-04 10:04:51,565 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-04 10:04:51,696 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-04 10:04:51,696 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:04:51,696 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:04:51,713 INFO L256 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-04 10:04:51,714 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:04:51,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-04 10:04:51,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-03-04 10:04:51,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:04:51,825 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:04:51,826 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:04:51,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60106235] [2025-03-04 10:04:51,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60106235] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:04:51,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:04:51,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 10:04:51,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531003966] [2025-03-04 10:04:51,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:04:51,826 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-04 10:04:51,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:04:51,827 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-04 10:04:51,827 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-04 10:04:52,033 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 120 [2025-03-04 10:04:52,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 101 transitions, 263 flow. Second operand has 5 states, 5 states have (on average 65.4) internal successors, (327), 5 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:52,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:04:52,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 120 [2025-03-04 10:04:52,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:04:52,265 INFO L124 PetriNetUnfolderBase]: 123/532 cut-off events. [2025-03-04 10:04:52,265 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2025-03-04 10:04:52,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 903 conditions, 532 events. 123/532 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2795 event pairs, 101 based on Foata normal form. 2/429 useless extension candidates. Maximal degree in co-relation 812. Up to 267 conditions per place. [2025-03-04 10:04:52,271 INFO L140 encePairwiseOnDemand]: 114/120 looper letters, 49 selfloop transitions, 5 changer transitions 0/108 dead transitions. [2025-03-04 10:04:52,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 108 transitions, 401 flow [2025-03-04 10:04:52,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 10:04:52,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 10:04:52,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 309 transitions. [2025-03-04 10:04:52,272 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.64375 [2025-03-04 10:04:52,272 INFO L175 Difference]: Start difference. First operand has 104 places, 101 transitions, 263 flow. Second operand 4 states and 309 transitions. [2025-03-04 10:04:52,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 108 transitions, 401 flow [2025-03-04 10:04:52,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 108 transitions, 385 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-04 10:04:52,274 INFO L231 Difference]: Finished difference. Result has 106 places, 105 transitions, 299 flow [2025-03-04 10:04:52,274 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=299, PETRI_PLACES=106, PETRI_TRANSITIONS=105} [2025-03-04 10:04:52,275 INFO L279 CegarLoopForPetriNet]: 105 programPoint places, 1 predicate places. [2025-03-04 10:04:52,275 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 105 transitions, 299 flow [2025-03-04 10:04:52,275 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 65.4) internal successors, (327), 5 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:52,275 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:04:52,275 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:04:52,287 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-04 10:04:52,476 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:52,476 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2025-03-04 10:04:52,477 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:04:52,477 INFO L85 PathProgramCache]: Analyzing trace with hash 34784552, now seen corresponding path program 1 times [2025-03-04 10:04:52,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:04:52,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [341200382] [2025-03-04 10:04:52,477 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:04:52,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:52,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:04:52,479 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:04:52,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-04 10:04:52,548 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-04 10:04:52,686 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-04 10:04:52,687 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:04:52,687 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:04:52,703 INFO L256 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-03-04 10:04:52,705 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:04:52,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-04 10:04:52,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2025-03-04 10:04:52,820 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-03-04 10:04:52,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2025-03-04 10:04:52,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-04 10:04:52,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-04 10:04:52,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-04 10:04:52,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:04:52,919 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:04:52,919 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:04:52,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341200382] [2025-03-04 10:04:52,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341200382] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:04:52,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:04:52,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-04 10:04:52,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554848154] [2025-03-04 10:04:52,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:04:52,920 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-04 10:04:52,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:04:52,920 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-04 10:04:52,920 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2025-03-04 10:04:53,799 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 120 [2025-03-04 10:04:53,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 105 transitions, 299 flow. Second operand has 10 states, 10 states have (on average 52.0) internal successors, (520), 10 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:53,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:04:53,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 120 [2025-03-04 10:04:53,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:04:54,411 INFO L124 PetriNetUnfolderBase]: 123/531 cut-off events. [2025-03-04 10:04:54,411 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2025-03-04 10:04:54,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 912 conditions, 531 events. 123/531 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2795 event pairs, 101 based on Foata normal form. 0/441 useless extension candidates. Maximal degree in co-relation 820. Up to 276 conditions per place. [2025-03-04 10:04:54,413 INFO L140 encePairwiseOnDemand]: 108/120 looper letters, 62 selfloop transitions, 11 changer transitions 0/121 dead transitions. [2025-03-04 10:04:54,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 121 transitions, 483 flow [2025-03-04 10:04:54,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-04 10:04:54,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-04 10:04:54,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 634 transitions. [2025-03-04 10:04:54,415 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4803030303030303 [2025-03-04 10:04:54,415 INFO L175 Difference]: Start difference. First operand has 106 places, 105 transitions, 299 flow. Second operand 11 states and 634 transitions. [2025-03-04 10:04:54,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 121 transitions, 483 flow [2025-03-04 10:04:54,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 121 transitions, 481 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-04 10:04:54,418 INFO L231 Difference]: Finished difference. Result has 120 places, 110 transitions, 355 flow [2025-03-04 10:04:54,418 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=355, PETRI_PLACES=120, PETRI_TRANSITIONS=110} [2025-03-04 10:04:54,418 INFO L279 CegarLoopForPetriNet]: 105 programPoint places, 15 predicate places. [2025-03-04 10:04:54,418 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 110 transitions, 355 flow [2025-03-04 10:04:54,419 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 52.0) internal successors, (520), 10 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:54,419 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:04:54,419 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:04:54,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-04 10:04:54,619 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:54,620 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2025-03-04 10:04:54,620 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:04:54,620 INFO L85 PathProgramCache]: Analyzing trace with hash 34784553, now seen corresponding path program 1 times [2025-03-04 10:04:54,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:04:54,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [946206691] [2025-03-04 10:04:54,620 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:04:54,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:54,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:04:54,622 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:04:54,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-04 10:04:54,686 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-04 10:04:54,835 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-04 10:04:54,835 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:04:54,835 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:04:54,853 INFO L256 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 38 conjuncts are in the unsatisfiable core [2025-03-04 10:04:54,855 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:04:54,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-04 10:04:54,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-04 10:04:54,980 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 10:04:54,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2025-03-04 10:04:55,033 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-03-04 10:04:55,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2025-03-04 10:04:55,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-03-04 10:04:55,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-04 10:04:55,083 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 10:04:55,129 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 10:04:55,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-04 10:04:55,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-04 10:04:55,168 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 10:04:55,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:04:55,210 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:04:55,210 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:04:55,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946206691] [2025-03-04 10:04:55,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946206691] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:04:55,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:04:55,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-04 10:04:55,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790575882] [2025-03-04 10:04:55,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:04:55,210 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-04 10:04:55,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:04:55,210 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-04 10:04:55,210 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-03-04 10:04:56,030 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 120 [2025-03-04 10:04:56,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 110 transitions, 355 flow. Second operand has 10 states, 10 states have (on average 50.0) internal successors, (500), 10 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:56,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:04:56,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 120 [2025-03-04 10:04:56,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:04:56,528 INFO L124 PetriNetUnfolderBase]: 123/530 cut-off events. [2025-03-04 10:04:56,529 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2025-03-04 10:04:56,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 949 conditions, 530 events. 123/530 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2776 event pairs, 101 based on Foata normal form. 1/444 useless extension candidates. Maximal degree in co-relation 869. Up to 280 conditions per place. [2025-03-04 10:04:56,531 INFO L140 encePairwiseOnDemand]: 108/120 looper letters, 64 selfloop transitions, 11 changer transitions 0/121 dead transitions. [2025-03-04 10:04:56,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 121 transitions, 535 flow [2025-03-04 10:04:56,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-04 10:04:56,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-04 10:04:56,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 614 transitions. [2025-03-04 10:04:56,533 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46515151515151515 [2025-03-04 10:04:56,533 INFO L175 Difference]: Start difference. First operand has 120 places, 110 transitions, 355 flow. Second operand 11 states and 614 transitions. [2025-03-04 10:04:56,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 121 transitions, 535 flow [2025-03-04 10:04:56,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 121 transitions, 531 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-04 10:04:56,536 INFO L231 Difference]: Finished difference. Result has 129 places, 110 transitions, 377 flow [2025-03-04 10:04:56,536 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=377, PETRI_PLACES=129, PETRI_TRANSITIONS=110} [2025-03-04 10:04:56,538 INFO L279 CegarLoopForPetriNet]: 105 programPoint places, 24 predicate places. [2025-03-04 10:04:56,538 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 110 transitions, 377 flow [2025-03-04 10:04:56,539 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 50.0) internal successors, (500), 10 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:56,539 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:04:56,539 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:04:56,554 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-04 10:04:56,739 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 10:04:56,739 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2025-03-04 10:04:56,740 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:04:56,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1078321704, now seen corresponding path program 1 times [2025-03-04 10:04:56,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:04:56,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1584377870] [2025-03-04 10:04:56,740 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:04:56,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:56,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:04:56,742 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 10:04:56,743 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 10:04:56,806 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-04 10:04:56,946 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-04 10:04:56,946 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:04:56,946 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:04:56,964 INFO L256 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-04 10:04:56,965 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:04:56,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-04 10:04:57,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:04:57,018 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:04:57,018 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:04:57,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584377870] [2025-03-04 10:04:57,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584377870] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:04:57,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:04:57,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 10:04:57,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637600304] [2025-03-04 10:04:57,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:04:57,019 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 10:04:57,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:04:57,019 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 10:04:57,019 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 10:04:57,137 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 120 [2025-03-04 10:04:57,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 110 transitions, 377 flow. Second operand has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:57,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:04:57,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 120 [2025-03-04 10:04:57,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:04:57,312 INFO L124 PetriNetUnfolderBase]: 122/521 cut-off events. [2025-03-04 10:04:57,312 INFO L125 PetriNetUnfolderBase]: For 67/67 co-relation queries the response was YES. [2025-03-04 10:04:57,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 924 conditions, 521 events. 122/521 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2725 event pairs, 100 based on Foata normal form. 8/439 useless extension candidates. Maximal degree in co-relation 851. Up to 257 conditions per place. [2025-03-04 10:04:57,315 INFO L140 encePairwiseOnDemand]: 115/120 looper letters, 42 selfloop transitions, 9 changer transitions 0/108 dead transitions. [2025-03-04 10:04:57,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 108 transitions, 475 flow [2025-03-04 10:04:57,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 10:04:57,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 10:04:57,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 298 transitions. [2025-03-04 10:04:57,316 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6208333333333333 [2025-03-04 10:04:57,317 INFO L175 Difference]: Start difference. First operand has 129 places, 110 transitions, 377 flow. Second operand 4 states and 298 transitions. [2025-03-04 10:04:57,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 108 transitions, 475 flow [2025-03-04 10:04:57,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 108 transitions, 453 flow, removed 0 selfloop flow, removed 10 redundant places. [2025-03-04 10:04:57,319 INFO L231 Difference]: Finished difference. Result has 120 places, 108 transitions, 369 flow [2025-03-04 10:04:57,319 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=369, PETRI_PLACES=120, PETRI_TRANSITIONS=108} [2025-03-04 10:04:57,319 INFO L279 CegarLoopForPetriNet]: 105 programPoint places, 15 predicate places. [2025-03-04 10:04:57,319 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 108 transitions, 369 flow [2025-03-04 10:04:57,320 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:57,320 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:04:57,320 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:04:57,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-04 10:04:57,520 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 10:04:57,520 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2025-03-04 10:04:57,521 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:04:57,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1078321703, now seen corresponding path program 1 times [2025-03-04 10:04:57,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:04:57,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1530070876] [2025-03-04 10:04:57,521 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:04:57,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:57,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:04:57,523 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 10:04:57,523 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 10:04:57,589 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-04 10:04:57,708 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-04 10:04:57,708 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:04:57,708 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:04:57,726 INFO L256 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-04 10:04:57,727 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:04:57,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:04:57,739 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:04:57,739 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:04:57,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530070876] [2025-03-04 10:04:57,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530070876] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:04:57,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:04:57,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 10:04:57,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628494034] [2025-03-04 10:04:57,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:04:57,739 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 10:04:57,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:04:57,740 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 10:04:57,740 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 10:04:57,846 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 120 [2025-03-04 10:04:57,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 108 transitions, 369 flow. Second operand has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:57,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:04:57,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 120 [2025-03-04 10:04:57,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:04:58,015 INFO L124 PetriNetUnfolderBase]: 122/513 cut-off events. [2025-03-04 10:04:58,016 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2025-03-04 10:04:58,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 925 conditions, 513 events. 122/513 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2665 event pairs, 100 based on Foata normal form. 0/431 useless extension candidates. Maximal degree in co-relation 859. Up to 257 conditions per place. [2025-03-04 10:04:58,018 INFO L140 encePairwiseOnDemand]: 115/120 looper letters, 44 selfloop transitions, 9 changer transitions 0/106 dead transitions. [2025-03-04 10:04:58,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 106 transitions, 471 flow [2025-03-04 10:04:58,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 10:04:58,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 10:04:58,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 292 transitions. [2025-03-04 10:04:58,019 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6083333333333333 [2025-03-04 10:04:58,019 INFO L175 Difference]: Start difference. First operand has 120 places, 108 transitions, 369 flow. Second operand 4 states and 292 transitions. [2025-03-04 10:04:58,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 106 transitions, 471 flow [2025-03-04 10:04:58,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 106 transitions, 453 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-04 10:04:58,021 INFO L231 Difference]: Finished difference. Result has 118 places, 106 transitions, 365 flow [2025-03-04 10:04:58,021 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=365, PETRI_PLACES=118, PETRI_TRANSITIONS=106} [2025-03-04 10:04:58,021 INFO L279 CegarLoopForPetriNet]: 105 programPoint places, 13 predicate places. [2025-03-04 10:04:58,021 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 106 transitions, 365 flow [2025-03-04 10:04:58,022 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:58,022 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:04:58,022 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:04:58,035 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 10:04:58,222 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 10:04:58,222 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2025-03-04 10:04:58,222 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:04:58,222 INFO L85 PathProgramCache]: Analyzing trace with hash 768271598, now seen corresponding path program 1 times [2025-03-04 10:04:58,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:04:58,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [439598080] [2025-03-04 10:04:58,223 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:04:58,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:58,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:04:58,225 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 10:04:58,226 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 10:04:58,298 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-04 10:04:58,425 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-04 10:04:58,425 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:04:58,425 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:04:58,444 INFO L256 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-04 10:04:58,445 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:04:58,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:04:58,458 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 10:04:58,480 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:04:58,480 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:04:58,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439598080] [2025-03-04 10:04:58,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439598080] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 10:04:58,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-04 10:04:58,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2025-03-04 10:04:58,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539685598] [2025-03-04 10:04:58,480 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-04 10:04:58,481 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-04 10:04:58,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:04:58,481 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-04 10:04:58,481 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-03-04 10:04:58,481 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 120 [2025-03-04 10:04:58,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 106 transitions, 365 flow. Second operand has 6 states, 6 states have (on average 69.83333333333333) internal successors, (419), 6 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:58,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:04:58,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 120 [2025-03-04 10:04:58,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:04:58,723 INFO L124 PetriNetUnfolderBase]: 122/563 cut-off events. [2025-03-04 10:04:58,723 INFO L125 PetriNetUnfolderBase]: For 151/151 co-relation queries the response was YES. [2025-03-04 10:04:58,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1051 conditions, 563 events. 122/563 cut-off events. For 151/151 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2753 event pairs, 100 based on Foata normal form. 6/483 useless extension candidates. Maximal degree in co-relation 977. Up to 253 conditions per place. [2025-03-04 10:04:58,726 INFO L140 encePairwiseOnDemand]: 116/120 looper letters, 59 selfloop transitions, 11 changer transitions 0/125 dead transitions. [2025-03-04 10:04:58,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 125 transitions, 627 flow [2025-03-04 10:04:58,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-04 10:04:58,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-04 10:04:58,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 461 transitions. [2025-03-04 10:04:58,727 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6402777777777777 [2025-03-04 10:04:58,727 INFO L175 Difference]: Start difference. First operand has 118 places, 106 transitions, 365 flow. Second operand 6 states and 461 transitions. [2025-03-04 10:04:58,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 125 transitions, 627 flow [2025-03-04 10:04:58,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 125 transitions, 583 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-04 10:04:58,731 INFO L231 Difference]: Finished difference. Result has 124 places, 111 transitions, 433 flow [2025-03-04 10:04:58,731 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=433, PETRI_PLACES=124, PETRI_TRANSITIONS=111} [2025-03-04 10:04:58,732 INFO L279 CegarLoopForPetriNet]: 105 programPoint places, 19 predicate places. [2025-03-04 10:04:58,732 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 111 transitions, 433 flow [2025-03-04 10:04:58,732 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 69.83333333333333) internal successors, (419), 6 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:58,732 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:04:58,732 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:04:58,745 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 10:04:58,932 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 10:04:58,933 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2025-03-04 10:04:58,933 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:04:58,933 INFO L85 PathProgramCache]: Analyzing trace with hash -305785327, now seen corresponding path program 1 times [2025-03-04 10:04:58,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:04:58,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1174164691] [2025-03-04 10:04:58,934 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:04:58,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:58,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:04:58,935 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 10:04:58,936 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 10:04:59,015 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-04 10:04:59,188 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-04 10:04:59,189 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:04:59,189 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:04:59,212 INFO L256 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-03-04 10:04:59,215 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:04:59,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-04 10:04:59,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2025-03-04 10:04:59,358 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 10:04:59,366 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 10:04:59,428 INFO L349 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2025-03-04 10:04:59,428 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 10:04:59,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2025-03-04 10:04:59,474 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 10:04:59,482 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 10:04:59,522 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 10:04:59,530 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 10:04:59,549 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 10:04:59,557 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 10:04:59,585 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 10:04:59,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:04:59,606 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 10:04:59,712 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|)))) (and (forall ((v_ArrVal_580 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$#3.offset| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_580) |c_~#c~0.base|) .cse1))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (forall ((v_ArrVal_581 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_580 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$#3.offset| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_580) |c_~#c~0.base|) .cse1)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#3.base| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_581) |c_~#c~0.base|) .cse1)))))) is different from false [2025-03-04 10:04:59,756 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|)))) (and (forall ((v_ArrVal_581 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_580 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$#3.offset| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_580) |c_~#c~0.base|) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#3.base| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_581) |c_~#c~0.base|) .cse0)))) (forall ((v_ArrVal_580 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$#3.offset| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_580) |c_~#c~0.base|) .cse0))) (bvule (bvadd (_ bv4 32) .cse1) (bvadd (_ bv8 32) .cse1)))))) is different from false [2025-03-04 10:04:59,815 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|)))) (and (forall ((|v_ULTIMATE.start_new_~p~0#1.base_47| (_ BitVec 32))) (or (forall ((v_ArrVal_581 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_575 (_ BitVec 32)) (v_ArrVal_580 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$#3.offset| |v_ULTIMATE.start_new_~p~0#1.base_47| v_ArrVal_580) |c_~#c~0.base|) .cse0)) (select (store |c_#length| |v_ULTIMATE.start_new_~p~0#1.base_47| v_ArrVal_575) (select (select (store |c_#memory_$Pointer$#3.base| |v_ULTIMATE.start_new_~p~0#1.base_47| v_ArrVal_581) |c_~#c~0.base|) .cse0)))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_new_~p~0#1.base_47|))))) (forall ((|v_ULTIMATE.start_new_~p~0#1.base_47| (_ BitVec 32))) (or (forall ((v_ArrVal_580 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$#3.offset| |v_ULTIMATE.start_new_~p~0#1.base_47| v_ArrVal_580) |c_~#c~0.base|) .cse0))) (bvule (bvadd (_ bv4 32) .cse1) (bvadd (_ bv8 32) .cse1)))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_new_~p~0#1.base_47|))))))) is different from false [2025-03-04 10:04:59,833 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 10:04:59,833 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 10:04:59,852 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 10:04:59,852 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 10:04:59,860 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 10:04:59,917 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 10:04:59,917 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 10:04:59,923 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 10:04:59,923 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 10:04:59,930 INFO L173 IndexEqualityManager]: detected equality via solver [2025-03-04 10:04:59,944 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 10:04:59,944 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 10:04:59,947 INFO L173 IndexEqualityManager]: detected equality via solver [2025-03-04 10:04:59,960 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 10:04:59,961 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 10:05:00,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2025-03-04 10:05:00,983 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:05:00,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174164691] [2025-03-04 10:05:00,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174164691] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 10:05:00,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-04 10:05:00,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2025-03-04 10:05:00,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165769250] [2025-03-04 10:05:00,983 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-04 10:05:00,984 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-04 10:05:00,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:05:00,984 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-04 10:05:00,984 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=178, Unknown=3, NotChecked=84, Total=306 [2025-03-04 10:05:01,307 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 120 [2025-03-04 10:05:01,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 111 transitions, 433 flow. Second operand has 18 states, 18 states have (on average 20.88888888888889) internal successors, (376), 18 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:05:01,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:05:01,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 120 [2025-03-04 10:05:01,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:05:03,177 INFO L124 PetriNetUnfolderBase]: 465/1258 cut-off events. [2025-03-04 10:05:03,177 INFO L125 PetriNetUnfolderBase]: For 120/120 co-relation queries the response was YES. [2025-03-04 10:05:03,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2508 conditions, 1258 events. 465/1258 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 7396 event pairs, 422 based on Foata normal form. 6/838 useless extension candidates. Maximal degree in co-relation 2439. Up to 945 conditions per place. [2025-03-04 10:05:03,183 INFO L140 encePairwiseOnDemand]: 110/120 looper letters, 77 selfloop transitions, 26 changer transitions 0/122 dead transitions. [2025-03-04 10:05:03,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 122 transitions, 679 flow [2025-03-04 10:05:03,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-04 10:05:03,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-04 10:05:03,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 334 transitions. [2025-03-04 10:05:03,186 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2141025641025641 [2025-03-04 10:05:03,186 INFO L175 Difference]: Start difference. First operand has 124 places, 111 transitions, 433 flow. Second operand 13 states and 334 transitions. [2025-03-04 10:05:03,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 122 transitions, 679 flow [2025-03-04 10:05:03,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 122 transitions, 663 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-03-04 10:05:03,189 INFO L231 Difference]: Finished difference. Result has 139 places, 118 transitions, 516 flow [2025-03-04 10:05:03,190 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=516, PETRI_PLACES=139, PETRI_TRANSITIONS=118} [2025-03-04 10:05:03,190 INFO L279 CegarLoopForPetriNet]: 105 programPoint places, 34 predicate places. [2025-03-04 10:05:03,190 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 118 transitions, 516 flow [2025-03-04 10:05:03,191 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 20.88888888888889) internal successors, (376), 18 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:05:03,191 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:05:03,191 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:05:03,205 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-04 10:05:03,391 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:05:03,392 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2025-03-04 10:05:03,392 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:05:03,392 INFO L85 PathProgramCache]: Analyzing trace with hash -305785328, now seen corresponding path program 1 times [2025-03-04 10:05:03,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:05:03,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [188883039] [2025-03-04 10:05:03,392 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:05:03,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:05:03,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:05:03,394 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:05:03,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-04 10:05:03,482 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-04 10:05:03,649 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-04 10:05:03,649 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:05:03,650 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:05:03,671 INFO L256 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-04 10:05:03,673 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:05:03,675 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 10:05:03,772 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 10:05:03,819 INFO L349 Elim1Store]: treesize reduction 86, result has 31.2 percent of original size [2025-03-04 10:05:03,819 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 34 treesize of output 59 [2025-03-04 10:05:03,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 29 [2025-03-04 10:05:03,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 29 [2025-03-04 10:05:03,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 21 [2025-03-04 10:05:03,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2025-03-04 10:05:04,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:05:04,009 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 10:05:04,045 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_684 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| (select (select (store |c_#memory_$Pointer$#3.base| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_684) |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 10:05:04,090 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_684 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| (select (select (store |c_#memory_$Pointer$#3.base| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_684) |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 10:05:04,190 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 10:05:04,191 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 10:05:04,201 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 10:05:04,201 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 10:05:04,210 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 10:05:29,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2025-03-04 10:05:29,287 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:05:29,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188883039] [2025-03-04 10:05:29,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188883039] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 10:05:29,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-04 10:05:29,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2025-03-04 10:05:29,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707954399] [2025-03-04 10:05:29,287 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-04 10:05:29,287 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-04 10:05:29,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:05:29,288 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-04 10:05:29,288 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=186, Unknown=14, NotChecked=58, Total=306 [2025-03-04 10:05:29,384 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 120 [2025-03-04 10:05:29,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 118 transitions, 516 flow. Second operand has 18 states, 18 states have (on average 28.88888888888889) internal successors, (520), 18 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:05:29,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:05:29,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 120 [2025-03-04 10:05:29,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:05:34,878 INFO L124 PetriNetUnfolderBase]: 329/1014 cut-off events. [2025-03-04 10:05:34,878 INFO L125 PetriNetUnfolderBase]: For 163/163 co-relation queries the response was YES. [2025-03-04 10:05:34,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2057 conditions, 1014 events. 329/1014 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 5870 event pairs, 292 based on Foata normal form. 6/795 useless extension candidates. Maximal degree in co-relation 1978. Up to 671 conditions per place. [2025-03-04 10:05:34,882 INFO L140 encePairwiseOnDemand]: 112/120 looper letters, 69 selfloop transitions, 25 changer transitions 0/121 dead transitions. [2025-03-04 10:05:34,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 121 transitions, 714 flow [2025-03-04 10:05:34,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-04 10:05:34,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-04 10:05:34,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 402 transitions. [2025-03-04 10:05:34,884 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2791666666666667 [2025-03-04 10:05:34,884 INFO L175 Difference]: Start difference. First operand has 139 places, 118 transitions, 516 flow. Second operand 12 states and 402 transitions. [2025-03-04 10:05:34,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 121 transitions, 714 flow [2025-03-04 10:05:34,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 121 transitions, 684 flow, removed 10 selfloop flow, removed 3 redundant places. [2025-03-04 10:05:34,887 INFO L231 Difference]: Finished difference. Result has 148 places, 118 transitions, 540 flow [2025-03-04 10:05:34,888 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=540, PETRI_PLACES=148, PETRI_TRANSITIONS=118} [2025-03-04 10:05:34,889 INFO L279 CegarLoopForPetriNet]: 105 programPoint places, 43 predicate places. [2025-03-04 10:05:34,889 INFO L471 AbstractCegarLoop]: Abstraction has has 148 places, 118 transitions, 540 flow [2025-03-04 10:05:34,890 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 28.88888888888889) internal successors, (520), 18 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:05:34,890 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:05:34,890 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1] [2025-03-04 10:05:34,904 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-04 10:05:35,090 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:05:35,090 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2025-03-04 10:05:35,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:05:35,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1436237098, now seen corresponding path program 2 times [2025-03-04 10:05:35,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:05:35,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [684757979] [2025-03-04 10:05:35,091 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 10:05:35,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:05:35,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:05:35,094 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:05:35,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-04 10:05:35,202 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-03-04 10:05:35,417 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-03-04 10:05:35,417 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 10:05:35,417 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:05:35,442 INFO L256 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-04 10:05:35,444 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:05:35,514 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:05:35,514 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 10:05:35,618 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:05:35,618 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:05:35,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684757979] [2025-03-04 10:05:35,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684757979] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 10:05:35,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-04 10:05:35,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2025-03-04 10:05:35,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304252064] [2025-03-04 10:05:35,618 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-04 10:05:35,618 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-04 10:05:35,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:05:35,619 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-04 10:05:35,619 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2025-03-04 10:05:35,619 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 120 [2025-03-04 10:05:35,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 118 transitions, 540 flow. Second operand has 12 states, 12 states have (on average 70.91666666666667) internal successors, (851), 12 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:05:35,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:05:35,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 120 [2025-03-04 10:05:35,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:05:36,343 INFO L124 PetriNetUnfolderBase]: 122/671 cut-off events. [2025-03-04 10:05:36,343 INFO L125 PetriNetUnfolderBase]: For 539/539 co-relation queries the response was YES. [2025-03-04 10:05:36,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1635 conditions, 671 events. 122/671 cut-off events. For 539/539 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2714 event pairs, 100 based on Foata normal form. 12/604 useless extension candidates. Maximal degree in co-relation 1558. Up to 253 conditions per place. [2025-03-04 10:05:36,346 INFO L140 encePairwiseOnDemand]: 116/120 looper letters, 89 selfloop transitions, 23 changer transitions 0/170 dead transitions. [2025-03-04 10:05:36,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 170 transitions, 1268 flow [2025-03-04 10:05:36,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-04 10:05:36,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-04 10:05:36,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 896 transitions. [2025-03-04 10:05:36,348 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2025-03-04 10:05:36,348 INFO L175 Difference]: Start difference. First operand has 148 places, 118 transitions, 540 flow. Second operand 12 states and 896 transitions. [2025-03-04 10:05:36,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 170 transitions, 1268 flow [2025-03-04 10:05:36,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 170 transitions, 1118 flow, removed 1 selfloop flow, removed 11 redundant places. [2025-03-04 10:05:36,352 INFO L231 Difference]: Finished difference. Result has 155 places, 131 transitions, 729 flow [2025-03-04 10:05:36,352 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=729, PETRI_PLACES=155, PETRI_TRANSITIONS=131} [2025-03-04 10:05:36,353 INFO L279 CegarLoopForPetriNet]: 105 programPoint places, 50 predicate places. [2025-03-04 10:05:36,353 INFO L471 AbstractCegarLoop]: Abstraction has has 155 places, 131 transitions, 729 flow [2025-03-04 10:05:36,353 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 70.91666666666667) internal successors, (851), 12 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:05:36,353 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:05:36,353 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1] [2025-03-04 10:05:36,370 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-04 10:05:36,554 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:05:36,554 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2025-03-04 10:05:36,555 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:05:36,555 INFO L85 PathProgramCache]: Analyzing trace with hash 2027344854, now seen corresponding path program 3 times [2025-03-04 10:05:36,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:05:36,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [51339519] [2025-03-04 10:05:36,555 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 10:05:36,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:05:36,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:05:36,557 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:05:36,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-04 10:05:36,737 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 97 statements into 12 equivalence classes.