./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_90-arrayloop2_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 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_90-arrayloop2_racing.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f41f3c018db74ffccd5759d166eb9816a1bf73b1747e3e539ecb5bf51feb56af --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-04 10:04:32,539 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-04 10:04:32,593 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-04 10:04:32,600 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-04 10:04:32,602 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-04 10:04:32,622 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-04 10:04:32,623 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-04 10:04:32,624 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-04 10:04:32,624 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-04 10:04:32,624 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-04 10:04:32,624 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-04 10:04:32,625 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-04 10:04:32,625 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-04 10:04:32,625 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-04 10:04:32,625 INFO L153 SettingsManager]: * Use SBE=true [2025-03-04 10:04:32,625 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-04 10:04:32,625 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-04 10:04:32,626 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-04 10:04:32,626 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-04 10:04:32,626 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-04 10:04:32,626 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-04 10:04:32,626 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-04 10:04:32,626 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-04 10:04:32,626 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-04 10:04:32,626 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-04 10:04:32,626 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-04 10:04:32,626 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-04 10:04:32,626 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-04 10:04:32,626 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-04 10:04:32,626 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-04 10:04:32,626 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-04 10:04:32,626 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-04 10:04:32,626 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-04 10:04:32,626 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 10:04:32,626 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-04 10:04:32,626 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-04 10:04:32,626 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-04 10:04:32,626 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-04 10:04:32,626 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-04 10:04:32,627 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-04 10:04:32,627 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-04 10:04:32,627 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-04 10:04:32,627 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f41f3c018db74ffccd5759d166eb9816a1bf73b1747e3e539ecb5bf51feb56af [2025-03-04 10:04:32,875 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-04 10:04:32,885 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-04 10:04:32,887 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-04 10:04:32,888 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-04 10:04:32,888 INFO L274 PluginConnector]: CDTParser initialized [2025-03-04 10:04:32,889 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_90-arrayloop2_racing.i [2025-03-04 10:04:34,078 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72e70b767/aa0ba24e4aac40c787225f446b31e3a9/FLAGfe3b905a8 [2025-03-04 10:04:34,347 INFO L384 CDTParser]: Found 1 translation units. [2025-03-04 10:04:34,347 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_90-arrayloop2_racing.i [2025-03-04 10:04:34,358 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72e70b767/aa0ba24e4aac40c787225f446b31e3a9/FLAGfe3b905a8 [2025-03-04 10:04:34,368 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72e70b767/aa0ba24e4aac40c787225f446b31e3a9 [2025-03-04 10:04:34,370 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-04 10:04:34,371 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-04 10:04:34,372 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-04 10:04:34,372 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-04 10:04:34,375 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-04 10:04:34,375 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 10:04:34" (1/1) ... [2025-03-04 10:04:34,377 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a4893e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:34, skipping insertion in model container [2025-03-04 10:04:34,377 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 10:04:34" (1/1) ... [2025-03-04 10:04:34,410 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-04 10:04:34,680 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:34,681 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:34,681 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:34,681 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:34,726 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 10:04:34,771 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 10:04:34,772 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@730978e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:34, skipping insertion in model container [2025-03-04 10:04:34,772 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-04 10:04:34,772 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2025-03-04 10:04:34,773 INFO L158 Benchmark]: Toolchain (without parser) took 401.98ms. Allocated memory is still 167.8MB. Free memory was 120.5MB in the beginning and 103.4MB in the end (delta: 17.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-04 10:04:34,774 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 201.3MB. Free memory is still 120.3MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-04 10:04:34,774 INFO L158 Benchmark]: CACSL2BoogieTranslator took 400.24ms. Allocated memory is still 167.8MB. Free memory was 120.5MB in the beginning and 103.4MB in the end (delta: 17.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-04 10:04:34,775 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 201.3MB. Free memory is still 120.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 400.24ms. Allocated memory is still 167.8MB. Free memory was 120.5MB in the beginning and 103.4MB in the end (delta: 17.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1044]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/goblint-regression/28-race_reach_90-arrayloop2_racing.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f41f3c018db74ffccd5759d166eb9816a1bf73b1747e3e539ecb5bf51feb56af --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-04 10:04:36,435 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-04 10:04:36,512 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2025-03-04 10:04:36,517 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-04 10:04:36,518 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-04 10:04:36,542 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-04 10:04:36,543 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-04 10:04:36,543 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-04 10:04:36,544 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-04 10:04:36,544 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-04 10:04:36,544 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-04 10:04:36,545 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-04 10:04:36,545 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-04 10:04:36,545 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-04 10:04:36,545 INFO L153 SettingsManager]: * Use SBE=true [2025-03-04 10:04:36,545 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-04 10:04:36,546 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-04 10:04:36,546 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-04 10:04:36,546 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-04 10:04:36,546 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-04 10:04:36,546 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-04 10:04:36,546 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-04 10:04:36,546 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-04 10:04:36,546 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-04 10:04:36,546 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-04 10:04:36,546 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2025-03-04 10:04:36,547 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2025-03-04 10:04:36,547 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-04 10:04:36,547 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-04 10:04:36,547 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-04 10:04:36,547 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-04 10:04:36,547 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-04 10:04:36,548 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-04 10:04:36,548 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-04 10:04:36,548 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-04 10:04:36,548 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 10:04:36,548 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-04 10:04:36,548 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-04 10:04:36,548 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2025-03-04 10:04:36,548 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2025-03-04 10:04:36,548 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-04 10:04:36,548 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-04 10:04:36,549 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-04 10:04:36,549 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-04 10:04:36,549 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f41f3c018db74ffccd5759d166eb9816a1bf73b1747e3e539ecb5bf51feb56af [2025-03-04 10:04:36,791 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-04 10:04:36,796 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-04 10:04:36,798 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-04 10:04:36,799 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-04 10:04:36,799 INFO L274 PluginConnector]: CDTParser initialized [2025-03-04 10:04:36,799 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_90-arrayloop2_racing.i [2025-03-04 10:04:38,027 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cc783729/1f86e6ffc3dc446f8ed5245706ce38a9/FLAG9af5018ce [2025-03-04 10:04:38,301 INFO L384 CDTParser]: Found 1 translation units. [2025-03-04 10:04:38,301 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_90-arrayloop2_racing.i [2025-03-04 10:04:38,319 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cc783729/1f86e6ffc3dc446f8ed5245706ce38a9/FLAG9af5018ce [2025-03-04 10:04:38,607 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cc783729/1f86e6ffc3dc446f8ed5245706ce38a9 [2025-03-04 10:04:38,609 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-04 10:04:38,610 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-04 10:04:38,611 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-04 10:04:38,612 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-04 10:04:38,615 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-04 10:04:38,616 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 10:04:38" (1/1) ... [2025-03-04 10:04:38,618 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c9cf985 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 10:04:38,618 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 10:04:38" (1/1) ... [2025-03-04 10:04:38,656 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-04 10:04:38,911 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:38,912 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:38,912 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:38,912 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:38,944 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 10:04:38,977 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2025-03-04 10:04:38,984 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-04 10:04:39,018 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:39,019 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:39,019 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:39,019 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:39,036 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 10:04:39,056 INFO L200 MainTranslator]: Completed pre-run [2025-03-04 10:04:39,092 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:39,092 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:39,092 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:39,092 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:39,104 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 10:04:39,153 INFO L204 MainTranslator]: Completed translation [2025-03-04 10:04:39,154 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:39 WrapperNode [2025-03-04 10:04:39,154 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-04 10:04:39,155 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-04 10:04:39,155 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-04 10:04:39,155 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-04 10:04:39,159 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:39" (1/1) ... [2025-03-04 10:04:39,176 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:39" (1/1) ... [2025-03-04 10:04:39,205 INFO L138 Inliner]: procedures = 284, calls = 143, calls flagged for inlining = 11, calls inlined = 12, statements flattened = 355 [2025-03-04 10:04:39,205 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-04 10:04:39,206 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-04 10:04:39,206 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-04 10:04:39,206 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-04 10:04:39,212 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:39" (1/1) ... [2025-03-04 10:04:39,212 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:39" (1/1) ... [2025-03-04 10:04:39,216 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:39" (1/1) ... [2025-03-04 10:04:39,232 INFO L175 MemorySlicer]: Split 105 memory accesses to 5 slices as follows [2, 5, 94, 2, 2]. 90 percent of accesses are in the largest equivalence class. The 77 initializations are split as follows [2, 5, 70, 0, 0]. The 15 writes are split as follows [0, 0, 13, 1, 1]. [2025-03-04 10:04:39,233 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:39" (1/1) ... [2025-03-04 10:04:39,233 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:39" (1/1) ... [2025-03-04 10:04:39,247 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:39" (1/1) ... [2025-03-04 10:04:39,249 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:39" (1/1) ... [2025-03-04 10:04:39,252 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:39" (1/1) ... [2025-03-04 10:04:39,253 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:39" (1/1) ... [2025-03-04 10:04:39,257 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-04 10:04:39,257 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-04 10:04:39,257 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-04 10:04:39,257 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-04 10:04:39,258 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:39" (1/1) ... [2025-03-04 10:04:39,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 10:04:39,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:04:39,297 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 10:04:39,299 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 10:04:39,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2025-03-04 10:04:39,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2025-03-04 10:04:39,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2025-03-04 10:04:39,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2025-03-04 10:04:39,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#4 [2025-03-04 10:04:39,316 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-04 10:04:39,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-03-04 10:04:39,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2025-03-04 10:04:39,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2025-03-04 10:04:39,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2025-03-04 10:04:39,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2025-03-04 10:04:39,316 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2025-03-04 10:04:39,317 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2025-03-04 10:04:39,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-04 10:04:39,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2025-03-04 10:04:39,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2025-03-04 10:04:39,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2025-03-04 10:04:39,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2025-03-04 10:04:39,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#4 [2025-03-04 10:04:39,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2025-03-04 10:04:39,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2025-03-04 10:04:39,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2025-03-04 10:04:39,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2025-03-04 10:04:39,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2025-03-04 10:04:39,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2025-03-04 10:04:39,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2025-03-04 10:04:39,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2025-03-04 10:04:39,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2025-03-04 10:04:39,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#4 [2025-03-04 10:04:39,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#0 [2025-03-04 10:04:39,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#1 [2025-03-04 10:04:39,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#2 [2025-03-04 10:04:39,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#3 [2025-03-04 10:04:39,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#4 [2025-03-04 10:04:39,317 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-03-04 10:04:39,317 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2025-03-04 10:04:39,317 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2025-03-04 10:04:39,317 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-03-04 10:04:39,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-04 10:04:39,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-04 10:04:39,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-03-04 10:04:39,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2025-03-04 10:04:39,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2025-03-04 10:04:39,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2025-03-04 10:04:39,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2025-03-04 10:04:39,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-04 10:04:39,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-04 10:04:39,321 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 10:04:39,450 INFO L256 CfgBuilder]: Building ICFG [2025-03-04 10:04:39,451 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-04 10:04:40,243 INFO L1325 $ProcedureCfgBuilder]: dead code at ProgramPoint L1082: havoc main_~#t2_ids~0#1.base, main_~#t2_ids~0#1.offset; [2025-03-04 10:04:40,244 INFO L1325 $ProcedureCfgBuilder]: dead code at ProgramPoint L1082-1: SUMMARY for call ULTIMATE.dealloc(main_~#t2_ids~0#1.base, main_~#t2_ids~0#1.offset); srcloc: null [2025-03-04 10:04:40,244 INFO L1325 $ProcedureCfgBuilder]: dead code at ProgramPoint L1082-2: havoc main_~#t1_ids~0#1.base, main_~#t1_ids~0#1.offset; [2025-03-04 10:04:40,244 INFO L1325 $ProcedureCfgBuilder]: dead code at ProgramPoint L1082-3: SUMMARY for call ULTIMATE.dealloc(main_~#t1_ids~0#1.base, main_~#t1_ids~0#1.offset); srcloc: null [2025-03-04 10:04:40,245 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-04 10:04:40,245 INFO L307 CfgBuilder]: Performing block encoding [2025-03-04 10:04:41,541 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-04 10:04:41,541 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-04 10:04:41,542 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 10:04:41 BoogieIcfgContainer [2025-03-04 10:04:41,542 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-04 10:04:41,544 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-04 10:04:41,544 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-04 10:04:41,548 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-04 10:04:41,548 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.03 10:04:38" (1/3) ... [2025-03-04 10:04:41,548 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68f83d55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 10:04:41, skipping insertion in model container [2025-03-04 10:04:41,548 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:39" (2/3) ... [2025-03-04 10:04:41,548 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68f83d55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 10:04:41, skipping insertion in model container [2025-03-04 10:04:41,549 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 10:04:41" (3/3) ... [2025-03-04 10:04:41,550 INFO L128 eAbstractionObserver]: Analyzing ICFG 28-race_reach_90-arrayloop2_racing.i [2025-03-04 10:04:41,561 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-04 10:04:41,562 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 28-race_reach_90-arrayloop2_racing.i that has 3 procedures, 168 locations, 1 initial locations, 18 loop locations, and 59 error locations. [2025-03-04 10:04:41,563 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-04 10:04:41,659 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-03-04 10:04:41,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 205 transitions, 430 flow [2025-03-04 10:04:41,774 INFO L124 PetriNetUnfolderBase]: 55/340 cut-off events. [2025-03-04 10:04:41,777 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-03-04 10:04:41,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 357 conditions, 340 events. 55/340 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1950 event pairs, 0 based on Foata normal form. 0/182 useless extension candidates. Maximal degree in co-relation 187. Up to 8 conditions per place. [2025-03-04 10:04:41,786 INFO L82 GeneralOperation]: Start removeDead. Operand has 174 places, 205 transitions, 430 flow [2025-03-04 10:04:41,795 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 174 places, 205 transitions, 430 flow [2025-03-04 10:04:41,803 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-04 10:04:41,810 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;@66726352, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-04 10:04:41,811 INFO L334 AbstractCegarLoop]: Starting to check reachability of 91 error locations. [2025-03-04 10:04:41,818 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-04 10:04:41,818 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2025-03-04 10:04:41,818 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-04 10:04:41,818 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:04:41,819 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-04 10:04:41,819 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-03-04 10:04:41,823 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:04:41,823 INFO L85 PathProgramCache]: Analyzing trace with hash 949740, now seen corresponding path program 1 times [2025-03-04 10:04:41,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:04:41,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [547377683] [2025-03-04 10:04:41,834 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:04:41,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:41,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:04:41,836 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 10:04:41,838 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 10:04:41,939 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-04 10:04:42,054 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-04 10:04:42,054 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:04:42,054 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:04:42,071 INFO L256 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-04 10:04:42,074 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:04:42,123 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 10:04:42,125 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:04:42,125 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:04:42,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547377683] [2025-03-04 10:04:42,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547377683] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:04:42,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:04:42,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-04 10:04:42,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315948776] [2025-03-04 10:04:42,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:04:42,131 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 10:04:42,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:04:42,150 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 10:04:42,151 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 10:04:42,388 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 205 [2025-03-04 10:04:42,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 205 transitions, 430 flow. Second operand has 4 states, 4 states have (on average 102.75) internal successors, (411), 4 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:42,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:04:42,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 205 [2025-03-04 10:04:42,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:04:44,121 INFO L124 PetriNetUnfolderBase]: 6915/16116 cut-off events. [2025-03-04 10:04:44,122 INFO L125 PetriNetUnfolderBase]: For 289/313 co-relation queries the response was YES. [2025-03-04 10:04:44,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26599 conditions, 16116 events. 6915/16116 cut-off events. For 289/313 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 158216 event pairs, 4107 based on Foata normal form. 2440/15990 useless extension candidates. Maximal degree in co-relation 25333. Up to 7199 conditions per place. [2025-03-04 10:04:44,234 INFO L140 encePairwiseOnDemand]: 173/205 looper letters, 115 selfloop transitions, 4 changer transitions 0/221 dead transitions. [2025-03-04 10:04:44,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 221 transitions, 700 flow [2025-03-04 10:04:44,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 10:04:44,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 10:04:44,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 579 transitions. [2025-03-04 10:04:44,250 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7060975609756097 [2025-03-04 10:04:44,251 INFO L175 Difference]: Start difference. First operand has 174 places, 205 transitions, 430 flow. Second operand 4 states and 579 transitions. [2025-03-04 10:04:44,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 221 transitions, 700 flow [2025-03-04 10:04:44,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 221 transitions, 700 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-04 10:04:44,266 INFO L231 Difference]: Finished difference. Result has 174 places, 177 transitions, 390 flow [2025-03-04 10:04:44,269 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=390, PETRI_PLACES=174, PETRI_TRANSITIONS=177} [2025-03-04 10:04:44,272 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, 0 predicate places. [2025-03-04 10:04:44,272 INFO L471 AbstractCegarLoop]: Abstraction has has 174 places, 177 transitions, 390 flow [2025-03-04 10:04:44,272 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 102.75) internal successors, (411), 4 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:44,272 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:04:44,273 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-04 10:04:44,287 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 10:04:44,473 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 10:04:44,474 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-03-04 10:04:44,474 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:04:44,474 INFO L85 PathProgramCache]: Analyzing trace with hash 949741, now seen corresponding path program 1 times [2025-03-04 10:04:44,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:04:44,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [227441074] [2025-03-04 10:04:44,475 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:04:44,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:44,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:04:44,478 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 10:04:44,480 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 10:04:44,560 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-04 10:04:44,688 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-04 10:04:44,689 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:04:44,689 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:04:44,705 INFO L256 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-04 10:04:44,706 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:04:44,754 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 10:04:44,755 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:04:44,755 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:04:44,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227441074] [2025-03-04 10:04:44,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227441074] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:04:44,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:04:44,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-04 10:04:44,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292948592] [2025-03-04 10:04:44,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:04:44,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 10:04:44,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:04:44,757 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 10:04:44,757 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 10:04:44,932 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 205 [2025-03-04 10:04:44,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 177 transitions, 390 flow. Second operand has 4 states, 4 states have (on average 104.75) internal successors, (419), 4 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:44,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:04:44,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 205 [2025-03-04 10:04:44,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:04:46,320 INFO L124 PetriNetUnfolderBase]: 6854/17172 cut-off events. [2025-03-04 10:04:46,320 INFO L125 PetriNetUnfolderBase]: For 728/752 co-relation queries the response was YES. [2025-03-04 10:04:46,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28432 conditions, 17172 events. 6854/17172 cut-off events. For 728/752 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 175673 event pairs, 5821 based on Foata normal form. 3/14405 useless extension candidates. Maximal degree in co-relation 27068. Up to 10124 conditions per place. [2025-03-04 10:04:46,415 INFO L140 encePairwiseOnDemand]: 197/205 looper letters, 74 selfloop transitions, 5 changer transitions 0/181 dead transitions. [2025-03-04 10:04:46,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 181 transitions, 562 flow [2025-03-04 10:04:46,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 10:04:46,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 10:04:46,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 498 transitions. [2025-03-04 10:04:46,419 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6073170731707317 [2025-03-04 10:04:46,419 INFO L175 Difference]: Start difference. First operand has 174 places, 177 transitions, 390 flow. Second operand 4 states and 498 transitions. [2025-03-04 10:04:46,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 181 transitions, 562 flow [2025-03-04 10:04:46,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 181 transitions, 550 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-04 10:04:46,433 INFO L231 Difference]: Finished difference. Result has 176 places, 181 transitions, 423 flow [2025-03-04 10:04:46,433 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=423, PETRI_PLACES=176, PETRI_TRANSITIONS=181} [2025-03-04 10:04:46,434 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, 2 predicate places. [2025-03-04 10:04:46,434 INFO L471 AbstractCegarLoop]: Abstraction has has 176 places, 181 transitions, 423 flow [2025-03-04 10:04:46,434 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 104.75) internal successors, (419), 4 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:46,434 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:04:46,434 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-03-04 10:04:46,446 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 10:04:46,635 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 10:04:46,635 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-03-04 10:04:46,635 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:04:46,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1770152570, now seen corresponding path program 1 times [2025-03-04 10:04:46,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:04:46,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [41153701] [2025-03-04 10:04:46,636 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:04:46,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:46,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:04:46,638 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 10:04:46,640 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 10:04:46,715 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-04 10:04:46,839 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-04 10:04:46,840 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:04:46,840 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:04:46,858 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-04 10:04:46,859 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:04:46,881 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 10:04:46,890 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 10:04:46,890 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:04:46,890 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:04:46,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41153701] [2025-03-04 10:04:46,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41153701] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:04:46,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:04:46,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-04 10:04:46,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10111692] [2025-03-04 10:04:46,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:04:46,890 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-04 10:04:46,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:04:46,891 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-04 10:04:46,891 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 10:04:47,049 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 205 [2025-03-04 10:04:47,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 181 transitions, 423 flow. Second operand has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:47,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:04:47,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 205 [2025-03-04 10:04:47,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:04:48,258 INFO L124 PetriNetUnfolderBase]: 6854/17143 cut-off events. [2025-03-04 10:04:48,259 INFO L125 PetriNetUnfolderBase]: For 314/358 co-relation queries the response was YES. [2025-03-04 10:04:48,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27906 conditions, 17143 events. 6854/17143 cut-off events. For 314/358 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 175355 event pairs, 5821 based on Foata normal form. 0/14380 useless extension candidates. Maximal degree in co-relation 27872. Up to 10099 conditions per place. [2025-03-04 10:04:48,358 INFO L140 encePairwiseOnDemand]: 202/205 looper letters, 72 selfloop transitions, 3 changer transitions 0/180 dead transitions. [2025-03-04 10:04:48,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 180 transitions, 571 flow [2025-03-04 10:04:48,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-04 10:04:48,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-04 10:04:48,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 393 transitions. [2025-03-04 10:04:48,360 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6390243902439025 [2025-03-04 10:04:48,360 INFO L175 Difference]: Start difference. First operand has 176 places, 181 transitions, 423 flow. Second operand 3 states and 393 transitions. [2025-03-04 10:04:48,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 180 transitions, 571 flow [2025-03-04 10:04:48,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 180 transitions, 568 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-04 10:04:48,365 INFO L231 Difference]: Finished difference. Result has 176 places, 180 transitions, 424 flow [2025-03-04 10:04:48,366 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=424, PETRI_PLACES=176, PETRI_TRANSITIONS=180} [2025-03-04 10:04:48,367 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, 2 predicate places. [2025-03-04 10:04:48,367 INFO L471 AbstractCegarLoop]: Abstraction has has 176 places, 180 transitions, 424 flow [2025-03-04 10:04:48,368 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:48,368 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:04:48,368 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-03-04 10:04:48,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-04 10:04:48,568 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 10:04:48,569 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-03-04 10:04:48,570 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:04:48,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1770152571, now seen corresponding path program 1 times [2025-03-04 10:04:48,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:04:48,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [852307858] [2025-03-04 10:04:48,571 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:04:48,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:48,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:04:48,576 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 10:04:48,578 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 10:04:48,651 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-04 10:04:48,760 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-04 10:04:48,761 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:04:48,761 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:04:48,777 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-04 10:04:48,778 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:04:48,783 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 10:04:48,791 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 10:04:48,792 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:04:48,792 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:04:48,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852307858] [2025-03-04 10:04:48,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852307858] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:04:48,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:04:48,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-04 10:04:48,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969072720] [2025-03-04 10:04:48,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:04:48,793 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-04 10:04:48,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:04:48,793 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-04 10:04:48,793 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 10:04:48,890 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 205 [2025-03-04 10:04:48,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 180 transitions, 424 flow. Second operand has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:48,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:04:48,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 205 [2025-03-04 10:04:48,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:04:49,821 INFO L124 PetriNetUnfolderBase]: 6854/17142 cut-off events. [2025-03-04 10:04:49,821 INFO L125 PetriNetUnfolderBase]: For 316/360 co-relation queries the response was YES. [2025-03-04 10:04:49,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27906 conditions, 17142 events. 6854/17142 cut-off events. For 316/360 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 175382 event pairs, 5821 based on Foata normal form. 0/14381 useless extension candidates. Maximal degree in co-relation 27871. Up to 10099 conditions per place. [2025-03-04 10:04:49,907 INFO L140 encePairwiseOnDemand]: 202/205 looper letters, 72 selfloop transitions, 3 changer transitions 0/179 dead transitions. [2025-03-04 10:04:49,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 179 transitions, 572 flow [2025-03-04 10:04:49,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-04 10:04:49,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-04 10:04:49,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 393 transitions. [2025-03-04 10:04:49,909 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6390243902439025 [2025-03-04 10:04:49,909 INFO L175 Difference]: Start difference. First operand has 176 places, 180 transitions, 424 flow. Second operand 3 states and 393 transitions. [2025-03-04 10:04:49,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 179 transitions, 572 flow [2025-03-04 10:04:49,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 179 transitions, 566 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-04 10:04:49,913 INFO L231 Difference]: Finished difference. Result has 175 places, 179 transitions, 422 flow [2025-03-04 10:04:49,914 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=422, PETRI_PLACES=175, PETRI_TRANSITIONS=179} [2025-03-04 10:04:49,915 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, 1 predicate places. [2025-03-04 10:04:49,915 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 179 transitions, 422 flow [2025-03-04 10:04:49,915 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:49,915 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:04:49,915 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:04:49,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-04 10:04:50,116 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:50,116 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-03-04 10:04:50,116 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:04:50,117 INFO L85 PathProgramCache]: Analyzing trace with hash 959846079, now seen corresponding path program 1 times [2025-03-04 10:04:50,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:04:50,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1373572032] [2025-03-04 10:04:50,117 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:04:50,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:50,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:04:50,120 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:04:50,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-04 10:04:50,191 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-04 10:04:50,305 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-04 10:04:50,305 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:04:50,305 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:04:50,324 INFO L256 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-04 10:04:50,326 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:04:50,333 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 10:04:50,344 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 10:04:50,345 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:04:50,345 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:04:50,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373572032] [2025-03-04 10:04:50,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373572032] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:04:50,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:04:50,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 10:04:50,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019621047] [2025-03-04 10:04:50,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:04:50,345 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 10:04:50,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:04:50,345 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 10:04:50,345 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 10:04:50,519 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 205 [2025-03-04 10:04:50,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 179 transitions, 422 flow. Second operand has 4 states, 4 states have (on average 102.75) internal successors, (411), 4 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:50,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:04:50,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 205 [2025-03-04 10:04:50,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:04:51,550 INFO L124 PetriNetUnfolderBase]: 6854/17140 cut-off events. [2025-03-04 10:04:51,551 INFO L125 PetriNetUnfolderBase]: For 310/354 co-relation queries the response was YES. [2025-03-04 10:04:51,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27907 conditions, 17140 events. 6854/17140 cut-off events. For 310/354 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 175354 event pairs, 5821 based on Foata normal form. 1/14383 useless extension candidates. Maximal degree in co-relation 27871. Up to 10099 conditions per place. [2025-03-04 10:04:51,612 INFO L140 encePairwiseOnDemand]: 198/205 looper letters, 70 selfloop transitions, 7 changer transitions 0/177 dead transitions. [2025-03-04 10:04:51,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 177 transitions, 572 flow [2025-03-04 10:04:51,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-04 10:04:51,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-04 10:04:51,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 580 transitions. [2025-03-04 10:04:51,614 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5658536585365853 [2025-03-04 10:04:51,614 INFO L175 Difference]: Start difference. First operand has 175 places, 179 transitions, 422 flow. Second operand 5 states and 580 transitions. [2025-03-04 10:04:51,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 177 transitions, 572 flow [2025-03-04 10:04:51,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 177 transitions, 566 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-04 10:04:51,618 INFO L231 Difference]: Finished difference. Result has 175 places, 177 transitions, 426 flow [2025-03-04 10:04:51,619 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=426, PETRI_PLACES=175, PETRI_TRANSITIONS=177} [2025-03-04 10:04:51,619 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, 1 predicate places. [2025-03-04 10:04:51,619 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 177 transitions, 426 flow [2025-03-04 10:04:51,619 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 102.75) internal successors, (411), 4 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:51,619 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:04:51,620 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:04:51,631 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 10:04:51,820 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:51,820 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-03-04 10:04:51,820 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:04:51,820 INFO L85 PathProgramCache]: Analyzing trace with hash 959846080, now seen corresponding path program 1 times [2025-03-04 10:04:51,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:04:51,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [609295445] [2025-03-04 10:04:51,821 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:04:51,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:51,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:04:51,822 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:04:51,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-04 10:04:51,900 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-04 10:04:52,040 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-04 10:04:52,041 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:04:52,041 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:04:52,058 INFO L256 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-04 10:04:52,060 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:04:52,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-04 10:04:52,094 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 10:04:52,094 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:04:52,094 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:04:52,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609295445] [2025-03-04 10:04:52,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609295445] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:04:52,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:04:52,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 10:04:52,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000914513] [2025-03-04 10:04:52,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:04:52,097 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 10:04:52,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:04:52,097 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 10:04:52,097 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 10:04:52,285 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 205 [2025-03-04 10:04:52,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 177 transitions, 426 flow. Second operand has 4 states, 4 states have (on average 104.5) internal successors, (418), 4 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:52,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:04:52,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 205 [2025-03-04 10:04:52,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:04:53,614 INFO L124 PetriNetUnfolderBase]: 6854/17138 cut-off events. [2025-03-04 10:04:53,614 INFO L125 PetriNetUnfolderBase]: For 316/360 co-relation queries the response was YES. [2025-03-04 10:04:53,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27909 conditions, 17138 events. 6854/17138 cut-off events. For 316/360 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 175318 event pairs, 5821 based on Foata normal form. 2/14382 useless extension candidates. Maximal degree in co-relation 27869. Up to 10101 conditions per place. [2025-03-04 10:04:53,711 INFO L140 encePairwiseOnDemand]: 200/205 looper letters, 73 selfloop transitions, 4 changer transitions 0/175 dead transitions. [2025-03-04 10:04:53,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 175 transitions, 576 flow [2025-03-04 10:04:53,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 10:04:53,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 10:04:53,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 487 transitions. [2025-03-04 10:04:53,713 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5939024390243902 [2025-03-04 10:04:53,713 INFO L175 Difference]: Start difference. First operand has 175 places, 177 transitions, 426 flow. Second operand 4 states and 487 transitions. [2025-03-04 10:04:53,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 175 transitions, 576 flow [2025-03-04 10:04:53,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 175 transitions, 562 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-04 10:04:53,716 INFO L231 Difference]: Finished difference. Result has 172 places, 175 transitions, 416 flow [2025-03-04 10:04:53,717 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=416, PETRI_PLACES=172, PETRI_TRANSITIONS=175} [2025-03-04 10:04:53,717 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, -2 predicate places. [2025-03-04 10:04:53,717 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 175 transitions, 416 flow [2025-03-04 10:04:53,717 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 104.5) internal successors, (418), 4 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:53,717 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:04:53,717 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2025-03-04 10:04:53,729 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 10:04:53,918 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 10:04:53,918 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-03-04 10:04:53,918 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:04:53,918 INFO L85 PathProgramCache]: Analyzing trace with hash 959844397, now seen corresponding path program 1 times [2025-03-04 10:04:53,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:04:53,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [915840005] [2025-03-04 10:04:53,919 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:04:53,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:53,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:04:53,920 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 10:04:53,921 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 10:04:53,986 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-04 10:04:54,097 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-04 10:04:54,098 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:04:54,098 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:04:54,113 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-03-04 10:04:54,114 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:04:54,119 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 10:04:54,119 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:04:54,119 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:04:54,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915840005] [2025-03-04 10:04:54,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915840005] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:04:54,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:04:54,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 10:04:54,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908915638] [2025-03-04 10:04:54,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:04:54,120 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-04 10:04:54,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:04:54,120 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-04 10:04:54,120 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 10:04:54,121 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 205 [2025-03-04 10:04:54,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 175 transitions, 416 flow. Second operand has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:54,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:04:54,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 205 [2025-03-04 10:04:54,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:04:55,030 INFO L124 PetriNetUnfolderBase]: 6853/17156 cut-off events. [2025-03-04 10:04:55,030 INFO L125 PetriNetUnfolderBase]: For 318/362 co-relation queries the response was YES. [2025-03-04 10:04:55,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27928 conditions, 17156 events. 6853/17156 cut-off events. For 318/362 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 175236 event pairs, 5821 based on Foata normal form. 2/14392 useless extension candidates. Maximal degree in co-relation 27896. Up to 10099 conditions per place. [2025-03-04 10:04:55,095 INFO L140 encePairwiseOnDemand]: 202/205 looper letters, 76 selfloop transitions, 3 changer transitions 0/179 dead transitions. [2025-03-04 10:04:55,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 179 transitions, 588 flow [2025-03-04 10:04:55,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-04 10:04:55,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-04 10:04:55,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 401 transitions. [2025-03-04 10:04:55,097 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6520325203252032 [2025-03-04 10:04:55,097 INFO L175 Difference]: Start difference. First operand has 172 places, 175 transitions, 416 flow. Second operand 3 states and 401 transitions. [2025-03-04 10:04:55,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 179 transitions, 588 flow [2025-03-04 10:04:55,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 179 transitions, 574 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-04 10:04:55,101 INFO L231 Difference]: Finished difference. Result has 172 places, 175 transitions, 419 flow [2025-03-04 10:04:55,101 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=419, PETRI_PLACES=172, PETRI_TRANSITIONS=175} [2025-03-04 10:04:55,103 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, -2 predicate places. [2025-03-04 10:04:55,103 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 175 transitions, 419 flow [2025-03-04 10:04:55,104 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:55,104 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:04:55,104 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:04:55,115 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 10:04:55,304 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 10:04:55,304 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-03-04 10:04:55,305 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:04:55,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1005859412, now seen corresponding path program 1 times [2025-03-04 10:04:55,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:04:55,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [614069522] [2025-03-04 10:04:55,305 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:04:55,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:55,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:04:55,307 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 10:04:55,308 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 10:04:55,381 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-04 10:04:55,505 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-04 10:04:55,506 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:04:55,506 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:04:55,522 INFO L256 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-04 10:04:55,523 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:04:55,564 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2025-03-04 10:04:55,564 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 10:04:55,598 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 10:04:55,599 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:04:55,599 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:04:55,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614069522] [2025-03-04 10:04:55,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614069522] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:04:55,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:04:55,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-04 10:04:55,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135904749] [2025-03-04 10:04:55,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:04:55,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 10:04:55,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:04:55,599 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 10:04:55,599 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 10:04:55,795 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 205 [2025-03-04 10:04:55,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 175 transitions, 419 flow. Second operand has 4 states, 4 states have (on average 105.75) internal successors, (423), 4 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:55,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:04:55,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 205 [2025-03-04 10:04:55,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:04:56,804 INFO L124 PetriNetUnfolderBase]: 6909/16083 cut-off events. [2025-03-04 10:04:56,804 INFO L125 PetriNetUnfolderBase]: For 376/420 co-relation queries the response was YES. [2025-03-04 10:04:56,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27154 conditions, 16083 events. 6909/16083 cut-off events. For 376/420 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 157570 event pairs, 4107 based on Foata normal form. 2/13631 useless extension candidates. Maximal degree in co-relation 27120. Up to 7187 conditions per place. [2025-03-04 10:04:56,879 INFO L140 encePairwiseOnDemand]: 199/205 looper letters, 116 selfloop transitions, 5 changer transitions 0/217 dead transitions. [2025-03-04 10:04:56,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 217 transitions, 745 flow [2025-03-04 10:04:56,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 10:04:56,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 10:04:56,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 535 transitions. [2025-03-04 10:04:56,881 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6524390243902439 [2025-03-04 10:04:56,881 INFO L175 Difference]: Start difference. First operand has 172 places, 175 transitions, 419 flow. Second operand 4 states and 535 transitions. [2025-03-04 10:04:56,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 217 transitions, 745 flow [2025-03-04 10:04:56,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 217 transitions, 742 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-04 10:04:56,885 INFO L231 Difference]: Finished difference. Result has 172 places, 173 transitions, 422 flow [2025-03-04 10:04:56,885 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=422, PETRI_PLACES=172, PETRI_TRANSITIONS=173} [2025-03-04 10:04:56,886 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, -2 predicate places. [2025-03-04 10:04:56,886 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 173 transitions, 422 flow [2025-03-04 10:04:56,886 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 105.75) internal successors, (423), 4 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:56,886 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:04:56,886 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:04:56,899 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 10:04:57,086 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 10:04:57,087 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-03-04 10:04:57,087 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:04:57,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1005859411, now seen corresponding path program 1 times [2025-03-04 10:04:57,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:04:57,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [938504768] [2025-03-04 10:04:57,087 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:04:57,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:57,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:04:57,089 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 10:04:57,090 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 10:04:57,165 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-04 10:04:57,304 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-04 10:04:57,305 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:04:57,305 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:04:57,323 INFO L256 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-04 10:04:57,324 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:04:57,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-04 10:04:57,377 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 10:04:57,419 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 10:04:57,419 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:04:57,419 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:04:57,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938504768] [2025-03-04 10:04:57,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938504768] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:04:57,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:04:57,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 10:04:57,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502372750] [2025-03-04 10:04:57,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:04:57,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-04 10:04:57,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:04:57,420 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-04 10:04:57,420 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-04 10:04:57,675 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 205 [2025-03-04 10:04:57,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 173 transitions, 422 flow. Second operand has 5 states, 5 states have (on average 105.4) internal successors, (527), 5 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:57,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:04:57,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 205 [2025-03-04 10:04:57,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:04:58,828 INFO L124 PetriNetUnfolderBase]: 6992/17493 cut-off events. [2025-03-04 10:04:58,828 INFO L125 PetriNetUnfolderBase]: For 829/873 co-relation queries the response was YES. [2025-03-04 10:04:58,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29075 conditions, 17493 events. 6992/17493 cut-off events. For 829/873 co-relation queries the response was YES. Maximal size of possible extension queue 628. Compared 179526 event pairs, 5947 based on Foata normal form. 2/14691 useless extension candidates. Maximal degree in co-relation 28983. Up to 10332 conditions per place. [2025-03-04 10:04:58,889 INFO L140 encePairwiseOnDemand]: 199/205 looper letters, 81 selfloop transitions, 5 changer transitions 0/180 dead transitions. [2025-03-04 10:04:58,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 180 transitions, 624 flow [2025-03-04 10:04:58,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 10:04:58,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 10:04:58,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 501 transitions. [2025-03-04 10:04:58,890 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6109756097560975 [2025-03-04 10:04:58,890 INFO L175 Difference]: Start difference. First operand has 172 places, 173 transitions, 422 flow. Second operand 4 states and 501 transitions. [2025-03-04 10:04:58,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 180 transitions, 624 flow [2025-03-04 10:04:58,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 180 transitions, 608 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-04 10:04:58,898 INFO L231 Difference]: Finished difference. Result has 174 places, 177 transitions, 458 flow [2025-03-04 10:04:58,898 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=458, PETRI_PLACES=174, PETRI_TRANSITIONS=177} [2025-03-04 10:04:58,899 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, 0 predicate places. [2025-03-04 10:04:58,899 INFO L471 AbstractCegarLoop]: Abstraction has has 174 places, 177 transitions, 458 flow [2025-03-04 10:04:58,899 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.4) internal successors, (527), 5 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:58,899 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:04:58,899 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:04:58,912 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 10:04:59,100 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 10:04:59,100 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-03-04 10:04:59,100 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:04:59,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1116869761, now seen corresponding path program 1 times [2025-03-04 10:04:59,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:04:59,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [482298759] [2025-03-04 10:04:59,100 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:04:59,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:59,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:04:59,102 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 10:04:59,103 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 10:04:59,174 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-04 10:04:59,311 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-04 10:04:59,311 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:04:59,311 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:04:59,329 INFO L256 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 35 conjuncts are in the unsatisfiable core [2025-03-04 10:04:59,331 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:04:59,392 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 10:04:59,402 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 10:04:59,437 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 10:04:59,446 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 10:04:59,494 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-03-04 10:04:59,494 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 10:04:59,501 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 10:04:59,548 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 10:04:59,561 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 10:04:59,609 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 10:04:59,617 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 10:04:59,654 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 10:04:59,664 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 10:04:59,714 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 10:04:59,714 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:04:59,714 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:04:59,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482298759] [2025-03-04 10:04:59,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482298759] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:04:59,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:04:59,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-04 10:04:59,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967203583] [2025-03-04 10:04:59,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:04:59,715 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-04 10:04:59,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:04:59,715 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-04 10:04:59,715 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-03-04 10:05:01,201 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 205 [2025-03-04 10:05:01,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 177 transitions, 458 flow. Second operand has 10 states, 10 states have (on average 90.0) internal successors, (900), 10 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:05:01,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:05:01,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 205 [2025-03-04 10:05:01,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:05:02,554 INFO L124 PetriNetUnfolderBase]: 6992/17492 cut-off events. [2025-03-04 10:05:02,555 INFO L125 PetriNetUnfolderBase]: For 397/441 co-relation queries the response was YES. [2025-03-04 10:05:02,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28626 conditions, 17492 events. 6992/17492 cut-off events. For 397/441 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 179573 event pairs, 5947 based on Foata normal form. 0/14703 useless extension candidates. Maximal degree in co-relation 28533. Up to 10345 conditions per place. [2025-03-04 10:05:02,611 INFO L140 encePairwiseOnDemand]: 193/205 looper letters, 96 selfloop transitions, 11 changer transitions 0/193 dead transitions. [2025-03-04 10:05:02,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 193 transitions, 710 flow [2025-03-04 10:05:02,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-04 10:05:02,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-04 10:05:02,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1086 transitions. [2025-03-04 10:05:02,614 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4815964523281596 [2025-03-04 10:05:02,614 INFO L175 Difference]: Start difference. First operand has 174 places, 177 transitions, 458 flow. Second operand 11 states and 1086 transitions. [2025-03-04 10:05:02,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 193 transitions, 710 flow [2025-03-04 10:05:02,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 193 transitions, 708 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-04 10:05:02,617 INFO L231 Difference]: Finished difference. Result has 188 places, 182 transitions, 514 flow [2025-03-04 10:05:02,618 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=514, PETRI_PLACES=188, PETRI_TRANSITIONS=182} [2025-03-04 10:05:02,618 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, 14 predicate places. [2025-03-04 10:05:02,618 INFO L471 AbstractCegarLoop]: Abstraction has has 188 places, 182 transitions, 514 flow [2025-03-04 10:05:02,619 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 90.0) internal successors, (900), 10 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:05:02,619 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:05:02,619 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:05:02,633 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 10:05:02,819 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 10:05:02,819 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-03-04 10:05:02,820 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:05:02,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1116869762, now seen corresponding path program 1 times [2025-03-04 10:05:02,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:05:02,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [974054511] [2025-03-04 10:05:02,820 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:05:02,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:05:02,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:05:02,822 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 10:05:02,823 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 10:05:02,894 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-04 10:05:03,026 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-04 10:05:03,026 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:05:03,026 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:05:03,042 INFO L256 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-04 10:05:03,044 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:05:03,087 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 10:05:03,119 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 10:05:03,146 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-03-04 10:05:03,146 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 10:05:03,174 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 10:05:03,205 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 10:05:03,225 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 10:05:03,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:05:03,260 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:05:03,260 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:05:03,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974054511] [2025-03-04 10:05:03,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974054511] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:05:03,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:05:03,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-04 10:05:03,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256171447] [2025-03-04 10:05:03,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:05:03,260 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-04 10:05:03,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:05:03,261 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-04 10:05:03,261 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2025-03-04 10:05:04,582 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 205 [2025-03-04 10:05:04,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 182 transitions, 514 flow. Second operand has 10 states, 10 states have (on average 92.0) internal successors, (920), 10 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:05:04,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:05:04,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 205 [2025-03-04 10:05:04,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:05:06,035 INFO L124 PetriNetUnfolderBase]: 6992/17491 cut-off events. [2025-03-04 10:05:06,035 INFO L125 PetriNetUnfolderBase]: For 408/452 co-relation queries the response was YES. [2025-03-04 10:05:06,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28655 conditions, 17491 events. 6992/17491 cut-off events. For 408/452 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 179520 event pairs, 5947 based on Foata normal form. 1/14706 useless extension candidates. Maximal degree in co-relation 28574. Up to 10341 conditions per place. [2025-03-04 10:05:06,092 INFO L140 encePairwiseOnDemand]: 193/205 looper letters, 94 selfloop transitions, 11 changer transitions 0/193 dead transitions. [2025-03-04 10:05:06,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 193 transitions, 754 flow [2025-03-04 10:05:06,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-04 10:05:06,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-04 10:05:06,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1106 transitions. [2025-03-04 10:05:06,095 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4904656319290466 [2025-03-04 10:05:06,095 INFO L175 Difference]: Start difference. First operand has 188 places, 182 transitions, 514 flow. Second operand 11 states and 1106 transitions. [2025-03-04 10:05:06,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 193 transitions, 754 flow [2025-03-04 10:05:06,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 193 transitions, 750 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-04 10:05:06,098 INFO L231 Difference]: Finished difference. Result has 197 places, 182 transitions, 536 flow [2025-03-04 10:05:06,098 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=536, PETRI_PLACES=197, PETRI_TRANSITIONS=182} [2025-03-04 10:05:06,098 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, 23 predicate places. [2025-03-04 10:05:06,098 INFO L471 AbstractCegarLoop]: Abstraction has has 197 places, 182 transitions, 536 flow [2025-03-04 10:05:06,099 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 92.0) internal successors, (920), 10 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:05:06,099 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:05:06,099 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:05:06,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-04 10:05:06,299 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:05:06,299 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-03-04 10:05:06,299 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:05:06,300 INFO L85 PathProgramCache]: Analyzing trace with hash -263223394, now seen corresponding path program 1 times [2025-03-04 10:05:06,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:05:06,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1935566460] [2025-03-04 10:05:06,300 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:05:06,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:05:06,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:05:06,302 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:05:06,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-04 10:05:06,373 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-04 10:05:06,479 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-04 10:05:06,479 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:05:06,479 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:05:06,494 INFO L256 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-04 10:05:06,496 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:05:06,499 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 10:05:06,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:05:06,510 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:05:06,511 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:05:06,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935566460] [2025-03-04 10:05:06,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935566460] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:05:06,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:05:06,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 10:05:06,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211936640] [2025-03-04 10:05:06,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:05:06,511 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 10:05:06,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:05:06,511 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 10:05:06,511 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 10:05:06,623 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 205 [2025-03-04 10:05:06,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 182 transitions, 536 flow. Second operand has 4 states, 4 states have (on average 105.0) internal successors, (420), 4 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:05:06,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:05:06,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 205 [2025-03-04 10:05:06,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:05:07,658 INFO L124 PetriNetUnfolderBase]: 6854/17172 cut-off events. [2025-03-04 10:05:07,658 INFO L125 PetriNetUnfolderBase]: For 358/402 co-relation queries the response was YES. [2025-03-04 10:05:07,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28036 conditions, 17172 events. 6854/17172 cut-off events. For 358/402 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 175638 event pairs, 5821 based on Foata normal form. 0/14419 useless extension candidates. Maximal degree in co-relation 27962. Up to 10100 conditions per place. [2025-03-04 10:05:07,723 INFO L140 encePairwiseOnDemand]: 200/205 looper letters, 75 selfloop transitions, 9 changer transitions 0/180 dead transitions. [2025-03-04 10:05:07,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 180 transitions, 700 flow [2025-03-04 10:05:07,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 10:05:07,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 10:05:07,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 487 transitions. [2025-03-04 10:05:07,725 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5939024390243902 [2025-03-04 10:05:07,725 INFO L175 Difference]: Start difference. First operand has 197 places, 182 transitions, 536 flow. Second operand 4 states and 487 transitions. [2025-03-04 10:05:07,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 180 transitions, 700 flow [2025-03-04 10:05:07,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 180 transitions, 678 flow, removed 0 selfloop flow, removed 10 redundant places. [2025-03-04 10:05:07,728 INFO L231 Difference]: Finished difference. Result has 188 places, 180 transitions, 528 flow [2025-03-04 10:05:07,728 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=528, PETRI_PLACES=188, PETRI_TRANSITIONS=180} [2025-03-04 10:05:07,728 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, 14 predicate places. [2025-03-04 10:05:07,728 INFO L471 AbstractCegarLoop]: Abstraction has has 188 places, 180 transitions, 528 flow [2025-03-04 10:05:07,729 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 105.0) internal successors, (420), 4 states have internal predecessors, (420), 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 10:05:07,729 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:05:07,729 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:05:07,742 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 10:05:07,929 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:05:07,929 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-03-04 10:05:07,930 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:05:07,930 INFO L85 PathProgramCache]: Analyzing trace with hash -263223393, now seen corresponding path program 1 times [2025-03-04 10:05:07,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:05:07,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1639737941] [2025-03-04 10:05:07,930 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:05:07,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:05:07,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:05:07,932 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:05:07,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-04 10:05:08,015 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-04 10:05:08,154 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-04 10:05:08,154 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:05:08,154 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:05:08,171 INFO L256 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-04 10:05:08,172 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:05:08,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-04 10:05:08,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:05:08,205 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:05:08,205 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:05:08,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639737941] [2025-03-04 10:05:08,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639737941] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:05:08,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:05:08,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 10:05:08,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694688175] [2025-03-04 10:05:08,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:05:08,206 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 10:05:08,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:05:08,206 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 10:05:08,206 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 10:05:08,380 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 205 [2025-03-04 10:05:08,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 180 transitions, 528 flow. Second operand has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:05:08,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:05:08,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 205 [2025-03-04 10:05:08,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:05:09,529 INFO L124 PetriNetUnfolderBase]: 6854/17164 cut-off events. [2025-03-04 10:05:09,529 INFO L125 PetriNetUnfolderBase]: For 390/434 co-relation queries the response was YES. [2025-03-04 10:05:09,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28021 conditions, 17164 events. 6854/17164 cut-off events. For 390/434 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 175586 event pairs, 5821 based on Foata normal form. 8/14419 useless extension candidates. Maximal degree in co-relation 27954. Up to 10100 conditions per place. [2025-03-04 10:05:09,606 INFO L140 encePairwiseOnDemand]: 200/205 looper letters, 73 selfloop transitions, 9 changer transitions 0/178 dead transitions. [2025-03-04 10:05:09,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 178 transitions, 688 flow [2025-03-04 10:05:09,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 10:05:09,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 10:05:09,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 493 transitions. [2025-03-04 10:05:09,607 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6012195121951219 [2025-03-04 10:05:09,607 INFO L175 Difference]: Start difference. First operand has 188 places, 180 transitions, 528 flow. Second operand 4 states and 493 transitions. [2025-03-04 10:05:09,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 178 transitions, 688 flow [2025-03-04 10:05:09,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 178 transitions, 670 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-04 10:05:09,610 INFO L231 Difference]: Finished difference. Result has 186 places, 178 transitions, 524 flow [2025-03-04 10:05:09,611 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=524, PETRI_PLACES=186, PETRI_TRANSITIONS=178} [2025-03-04 10:05:09,611 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, 12 predicate places. [2025-03-04 10:05:09,611 INFO L471 AbstractCegarLoop]: Abstraction has has 186 places, 178 transitions, 524 flow [2025-03-04 10:05:09,611 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:05:09,611 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:05:09,612 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:05:09,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-04 10:05:09,812 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:05:09,812 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-03-04 10:05:09,812 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:05:09,812 INFO L85 PathProgramCache]: Analyzing trace with hash -2062698891, now seen corresponding path program 1 times [2025-03-04 10:05:09,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:05:09,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [75883437] [2025-03-04 10:05:09,813 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:05:09,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:05:09,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:05:09,814 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:05:09,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-04 10:05:09,896 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-04 10:05:10,012 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-04 10:05:10,012 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:05:10,012 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:05:10,030 INFO L256 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-04 10:05:10,031 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:05:10,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:05:10,043 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 10:05:10,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:05:10,061 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:05:10,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75883437] [2025-03-04 10:05:10,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75883437] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 10:05:10,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-04 10:05:10,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2025-03-04 10:05:10,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617914931] [2025-03-04 10:05:10,061 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-04 10:05:10,061 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-04 10:05:10,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:05:10,062 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-04 10:05:10,062 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-03-04 10:05:10,062 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 205 [2025-03-04 10:05:10,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 178 transitions, 524 flow. Second operand has 6 states, 6 states have (on average 110.83333333333333) internal successors, (665), 6 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:05:10,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:05:10,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 205 [2025-03-04 10:05:10,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:05:11,146 INFO L124 PetriNetUnfolderBase]: 6854/17214 cut-off events. [2025-03-04 10:05:11,146 INFO L125 PetriNetUnfolderBase]: For 454/498 co-relation queries the response was YES. [2025-03-04 10:05:11,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28155 conditions, 17214 events. 6854/17214 cut-off events. For 454/498 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 175952 event pairs, 5821 based on Foata normal form. 6/14463 useless extension candidates. Maximal degree in co-relation 28080. Up to 10096 conditions per place. [2025-03-04 10:05:11,222 INFO L140 encePairwiseOnDemand]: 201/205 looper letters, 90 selfloop transitions, 11 changer transitions 0/197 dead transitions. [2025-03-04 10:05:11,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 197 transitions, 848 flow [2025-03-04 10:05:11,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-04 10:05:11,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-04 10:05:11,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 738 transitions. [2025-03-04 10:05:11,224 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6 [2025-03-04 10:05:11,224 INFO L175 Difference]: Start difference. First operand has 186 places, 178 transitions, 524 flow. Second operand 6 states and 738 transitions. [2025-03-04 10:05:11,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 197 transitions, 848 flow [2025-03-04 10:05:11,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 197 transitions, 804 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-04 10:05:11,228 INFO L231 Difference]: Finished difference. Result has 192 places, 183 transitions, 592 flow [2025-03-04 10:05:11,228 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=592, PETRI_PLACES=192, PETRI_TRANSITIONS=183} [2025-03-04 10:05:11,229 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, 18 predicate places. [2025-03-04 10:05:11,229 INFO L471 AbstractCegarLoop]: Abstraction has has 192 places, 183 transitions, 592 flow [2025-03-04 10:05:11,229 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 110.83333333333333) internal successors, (665), 6 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:05:11,229 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:05:11,229 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:05:11,241 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-04 10:05:11,430 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:05:11,430 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-03-04 10:05:11,430 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:05:11,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1714601929, now seen corresponding path program 1 times [2025-03-04 10:05:11,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:05:11,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [137644728] [2025-03-04 10:05:11,431 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:05:11,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:05:11,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:05:11,432 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:05:11,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-04 10:05:11,516 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-04 10:05:11,670 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-04 10:05:11,670 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:05:11,670 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:05:11,691 INFO L256 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 41 conjuncts are in the unsatisfiable core [2025-03-04 10:05:11,693 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:05:11,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-04 10:05:11,834 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 10:05:11,840 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 10:05:11,878 INFO L349 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2025-03-04 10:05:11,878 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 10:05:11,888 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 10:05:11,914 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 10:05:11,923 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 10:05:11,954 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 10:05:11,963 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 10:05:11,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 19 [2025-03-04 10:05:11,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-04 10:05:12,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2025-03-04 10:05:12,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:05:12,029 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 10:05:12,128 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|)))) (and (forall ((v_ArrVal_576 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_576) |c_~#c~0.base|) .cse1))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (forall ((v_ArrVal_575 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_576 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_576) |c_~#c~0.base|) .cse1)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_575) |c_~#c~0.base|) .cse1)))))) is different from false [2025-03-04 10:05:12,167 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|)))) (and (forall ((v_ArrVal_576 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_576) |c_~#c~0.base|) .cse1))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (forall ((v_ArrVal_575 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_576 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_576) |c_~#c~0.base|) .cse1)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_575) |c_~#c~0.base|) .cse1)))))) is different from false [2025-03-04 10:05:12,238 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|)))) (and (forall ((|v_ULTIMATE.start_new_~p~0#1.base_45| (_ BitVec 32))) (or (forall ((v_ArrVal_576 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_new_~p~0#1.base_45| v_ArrVal_576) |c_~#c~0.base|) .cse1))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_new_~p~0#1.base_45|))))) (forall ((|v_ULTIMATE.start_new_~p~0#1.base_45| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_new_~p~0#1.base_45|))) (forall ((v_ArrVal_575 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_576 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_570 (_ BitVec 32))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_new_~p~0#1.base_45| v_ArrVal_576) |c_~#c~0.base|) .cse1)) (select (store |c_#length| |v_ULTIMATE.start_new_~p~0#1.base_45| v_ArrVal_570) (select (select (store |c_#memory_$Pointer$#2.base| |v_ULTIMATE.start_new_~p~0#1.base_45| v_ArrVal_575) |c_~#c~0.base|) .cse1)))))))) is different from false [2025-03-04 10:05:12,259 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 10:05:12,259 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 10:05:12,274 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 10:05:12,275 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 10:05:12,284 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 10:05:12,335 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 10:05:12,335 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 10:05:12,342 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 10:05:12,344 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 10:05:12,346 INFO L173 IndexEqualityManager]: detected equality via solver [2025-03-04 10:05:12,359 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 10:05:12,359 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 10:05:12,362 INFO L173 IndexEqualityManager]: detected equality via solver [2025-03-04 10:05:12,376 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 10:05:12,376 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 10:05:13,748 INFO L349 Elim1Store]: treesize reduction 10, result has 83.6 percent of original size [2025-03-04 10:05:13,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 91 [2025-03-04 10:05:13,917 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 10:05:13,917 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:05:13,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137644728] [2025-03-04 10:05:13,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137644728] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 10:05:13,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-04 10:05:13,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2025-03-04 10:05:13,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835913361] [2025-03-04 10:05:13,918 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-04 10:05:13,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-04 10:05:13,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:05:13,918 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-04 10:05:13,918 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=262, Unknown=3, NotChecked=102, Total=420 [2025-03-04 10:05:13,921 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 205 [2025-03-04 10:05:13,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 183 transitions, 592 flow. Second operand has 21 states, 21 states have (on average 39.61904761904762) internal successors, (832), 21 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:05:13,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:05:13,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 205 [2025-03-04 10:05:13,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:05:23,842 INFO L124 PetriNetUnfolderBase]: 47722/84362 cut-off events. [2025-03-04 10:05:23,842 INFO L125 PetriNetUnfolderBase]: For 749/749 co-relation queries the response was YES. [2025-03-04 10:05:24,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156919 conditions, 84362 events. 47722/84362 cut-off events. For 749/749 co-relation queries the response was YES. Maximal size of possible extension queue 2703. Compared 823508 event pairs, 43378 based on Foata normal form. 0/53192 useless extension candidates. Maximal degree in co-relation 156831. Up to 70473 conditions per place. [2025-03-04 10:05:24,325 INFO L140 encePairwiseOnDemand]: 195/205 looper letters, 130 selfloop transitions, 26 changer transitions 0/194 dead transitions. [2025-03-04 10:05:24,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 194 transitions, 944 flow [2025-03-04 10:05:24,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-04 10:05:24,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-04 10:05:24,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 634 transitions. [2025-03-04 10:05:24,329 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2378986866791745 [2025-03-04 10:05:24,329 INFO L175 Difference]: Start difference. First operand has 192 places, 183 transitions, 592 flow. Second operand 13 states and 634 transitions. [2025-03-04 10:05:24,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 194 transitions, 944 flow [2025-03-04 10:05:24,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 194 transitions, 928 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-03-04 10:05:24,334 INFO L231 Difference]: Finished difference. Result has 207 places, 190 transitions, 675 flow [2025-03-04 10:05:24,335 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=576, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=675, PETRI_PLACES=207, PETRI_TRANSITIONS=190} [2025-03-04 10:05:24,335 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, 33 predicate places. [2025-03-04 10:05:24,335 INFO L471 AbstractCegarLoop]: Abstraction has has 207 places, 190 transitions, 675 flow [2025-03-04 10:05:24,335 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 39.61904761904762) internal successors, (832), 21 states have internal predecessors, (832), 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 10:05:24,335 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:05:24,336 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:05:24,352 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 10:05:24,536 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 10:05:24,536 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-03-04 10:05:24,536 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:05:24,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1714601930, now seen corresponding path program 1 times [2025-03-04 10:05:24,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:05:24,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [600869397] [2025-03-04 10:05:24,537 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:05:24,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:05:24,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:05:24,539 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 10:05:24,539 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 10:05:24,635 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-04 10:05:24,790 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-04 10:05:24,790 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:05:24,790 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:05:24,810 INFO L256 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-04 10:05:24,812 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:05:24,815 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 10:05:24,906 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 10:05:24,952 INFO L349 Elim1Store]: treesize reduction 86, result has 31.2 percent of original size [2025-03-04 10:05:24,952 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 10:05:24,999 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 10:05:25,036 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 10:05:25,062 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 10:05:25,117 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 10:05:25,156 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 10:05:25,156 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 10:05:25,194 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_679 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_679) |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 10:05:25,205 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_679 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_679) |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 10:05:25,342 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 10:05:25,343 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 10:05:25,352 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 10:05:25,352 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 10:05:25,357 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 10:05:53,917 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 10:05:53,917 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:05:53,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600869397] [2025-03-04 10:05:53,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600869397] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 10:05:53,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-04 10:05:53,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2025-03-04 10:05:53,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205466629] [2025-03-04 10:05:53,918 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-04 10:05:53,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-04 10:05:53,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:05:53,919 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-04 10:05:53,919 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=188, Unknown=12, NotChecked=58, Total=306 [2025-03-04 10:05:54,073 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 205 [2025-03-04 10:05:54,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 190 transitions, 675 flow. Second operand has 18 states, 18 states have (on average 55.888888888888886) internal successors, (1006), 18 states have internal predecessors, (1006), 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 10:05:54,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:05:54,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 205 [2025-03-04 10:05:54,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:06:03,996 INFO L124 PetriNetUnfolderBase]: 27664/54539 cut-off events. [2025-03-04 10:06:03,997 INFO L125 PetriNetUnfolderBase]: For 678/678 co-relation queries the response was YES. [2025-03-04 10:06:04,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97007 conditions, 54539 events. 27664/54539 cut-off events. For 678/678 co-relation queries the response was YES. Maximal size of possible extension queue 1689. Compared 557922 event pairs, 24779 based on Foata normal form. 6/41155 useless extension candidates. Maximal degree in co-relation 96928. Up to 40791 conditions per place. [2025-03-04 10:06:04,306 INFO L140 encePairwiseOnDemand]: 197/205 looper letters, 114 selfloop transitions, 25 changer transitions 0/193 dead transitions. [2025-03-04 10:06:04,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 193 transitions, 963 flow [2025-03-04 10:06:04,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-04 10:06:04,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-04 10:06:04,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 771 transitions. [2025-03-04 10:06:04,314 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.31341463414634146 [2025-03-04 10:06:04,314 INFO L175 Difference]: Start difference. First operand has 207 places, 190 transitions, 675 flow. Second operand 12 states and 771 transitions. [2025-03-04 10:06:04,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 193 transitions, 963 flow [2025-03-04 10:06:04,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 193 transitions, 933 flow, removed 10 selfloop flow, removed 3 redundant places. [2025-03-04 10:06:04,318 INFO L231 Difference]: Finished difference. Result has 216 places, 190 transitions, 699 flow [2025-03-04 10:06:04,319 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=645, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=699, PETRI_PLACES=216, PETRI_TRANSITIONS=190} [2025-03-04 10:06:04,319 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, 42 predicate places. [2025-03-04 10:06:04,319 INFO L471 AbstractCegarLoop]: Abstraction has has 216 places, 190 transitions, 699 flow [2025-03-04 10:06:04,319 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 55.888888888888886) internal successors, (1006), 18 states have internal predecessors, (1006), 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 10:06:04,319 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:06:04,319 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1] [2025-03-04 10:06:04,332 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 10:06:04,520 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 10:06:04,520 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-03-04 10:06:04,520 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:06:04,520 INFO L85 PathProgramCache]: Analyzing trace with hash 836301357, now seen corresponding path program 2 times [2025-03-04 10:06:04,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:06:04,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [257268811] [2025-03-04 10:06:04,521 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 10:06:04,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:06:04,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:06:04,524 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 10:06:04,524 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 10:06:04,643 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-03-04 10:06:04,855 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-03-04 10:06:04,856 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 10:06:04,856 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:06:04,880 INFO L256 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-04 10:06:04,882 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:06:04,944 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 10:06:04,945 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 10:06:05,044 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 10:06:05,044 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:06:05,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257268811] [2025-03-04 10:06:05,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257268811] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 10:06:05,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-04 10:06:05,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2025-03-04 10:06:05,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091898960] [2025-03-04 10:06:05,044 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-04 10:06:05,044 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-04 10:06:05,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:06:05,045 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-04 10:06:05,045 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2025-03-04 10:06:05,045 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 205 [2025-03-04 10:06:05,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 190 transitions, 699 flow. Second operand has 12 states, 12 states have (on average 111.91666666666667) internal successors, (1343), 12 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:06:05,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:06:05,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 205 [2025-03-04 10:06:05,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:06:07,118 INFO L124 PetriNetUnfolderBase]: 6854/17322 cut-off events. [2025-03-04 10:06:07,118 INFO L125 PetriNetUnfolderBase]: For 842/886 co-relation queries the response was YES. [2025-03-04 10:06:07,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28739 conditions, 17322 events. 6854/17322 cut-off events. For 842/886 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 176236 event pairs, 5821 based on Foata normal form. 12/14584 useless extension candidates. Maximal degree in co-relation 28661. Up to 10096 conditions per place. [2025-03-04 10:06:07,209 INFO L140 encePairwiseOnDemand]: 201/205 looper letters, 120 selfloop transitions, 23 changer transitions 0/242 dead transitions. [2025-03-04 10:06:07,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 242 transitions, 1489 flow [2025-03-04 10:06:07,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-04 10:06:07,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-04 10:06:07,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1419 transitions. [2025-03-04 10:06:07,211 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5768292682926829 [2025-03-04 10:06:07,211 INFO L175 Difference]: Start difference. First operand has 216 places, 190 transitions, 699 flow. Second operand 12 states and 1419 transitions. [2025-03-04 10:06:07,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 242 transitions, 1489 flow