./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/09-regions_24-evilcollapse_nr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/goblint-regression/09-regions_24-evilcollapse_nr.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 085e9170c725dbfce47ad23ff96af1e2e4188372955794675158fde45968fe8a --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-09 01:14:05,342 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-09 01:14:05,400 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-09 01:14:05,407 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-09 01:14:05,407 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-09 01:14:05,427 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-09 01:14:05,429 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-09 01:14:05,429 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-09 01:14:05,429 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-09 01:14:05,429 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-09 01:14:05,429 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-09 01:14:05,429 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-09 01:14:05,430 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-09 01:14:05,430 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-09 01:14:05,430 INFO L153 SettingsManager]: * Use SBE=true [2025-03-09 01:14:05,430 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-09 01:14:05,430 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-09 01:14:05,430 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-09 01:14:05,430 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-09 01:14:05,430 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-09 01:14:05,430 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-09 01:14:05,430 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-09 01:14:05,430 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-09 01:14:05,430 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-09 01:14:05,430 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-09 01:14:05,430 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-09 01:14:05,430 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-09 01:14:05,430 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-09 01:14:05,431 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-09 01:14:05,431 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-09 01:14:05,431 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-09 01:14:05,431 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-09 01:14:05,431 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-09 01:14:05,431 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-09 01:14:05,431 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-09 01:14:05,431 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-09 01:14:05,431 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-09 01:14:05,431 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-09 01:14:05,431 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-09 01:14:05,431 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-09 01:14:05,431 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-09 01:14:05,431 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-09 01:14:05,431 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 -> 085e9170c725dbfce47ad23ff96af1e2e4188372955794675158fde45968fe8a [2025-03-09 01:14:05,687 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-09 01:14:05,693 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-09 01:14:05,696 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-09 01:14:05,696 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-09 01:14:05,697 INFO L274 PluginConnector]: CDTParser initialized [2025-03-09 01:14:05,699 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/09-regions_24-evilcollapse_nr.i [2025-03-09 01:14:06,810 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/097a0f9c6/156ca94219ad49c7a39ef2c425805661/FLAG702a6b379 [2025-03-09 01:14:07,139 INFO L384 CDTParser]: Found 1 translation units. [2025-03-09 01:14:07,141 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_24-evilcollapse_nr.i [2025-03-09 01:14:07,157 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/097a0f9c6/156ca94219ad49c7a39ef2c425805661/FLAG702a6b379 [2025-03-09 01:14:07,389 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/097a0f9c6/156ca94219ad49c7a39ef2c425805661 [2025-03-09 01:14:07,391 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-09 01:14:07,392 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-09 01:14:07,393 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-09 01:14:07,393 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-09 01:14:07,397 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-09 01:14:07,398 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.03 01:14:07" (1/1) ... [2025-03-09 01:14:07,399 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3450a511 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:14:07, skipping insertion in model container [2025-03-09 01:14:07,399 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.03 01:14:07" (1/1) ... [2025-03-09 01:14:07,431 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-09 01:14:07,709 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:14:07,709 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:14:07,709 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:14:07,710 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:14:07,731 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-09 01:14:07,756 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) [2025-03-09 01:14:07,756 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7dd40d2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:14:07, skipping insertion in model container [2025-03-09 01:14:07,756 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-09 01:14:07,757 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2025-03-09 01:14:07,758 INFO L158 Benchmark]: Toolchain (without parser) took 365.61ms. Allocated memory is still 142.6MB. Free memory was 111.8MB in the beginning and 95.5MB in the end (delta: 16.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-03-09 01:14:07,758 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 201.3MB. Free memory is still 123.1MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-09 01:14:07,758 INFO L158 Benchmark]: CACSL2BoogieTranslator took 363.53ms. Allocated memory is still 142.6MB. Free memory was 111.8MB in the beginning and 95.5MB in the end (delta: 16.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-03-09 01:14:07,759 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 201.3MB. Free memory is still 123.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 363.53ms. Allocated memory is still 142.6MB. Free memory was 111.8MB in the beginning and 95.5MB in the end (delta: 16.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1045]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/goblint-regression/09-regions_24-evilcollapse_nr.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 085e9170c725dbfce47ad23ff96af1e2e4188372955794675158fde45968fe8a --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-09 01:14:09,521 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-09 01:14:09,616 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2025-03-09 01:14:09,623 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-09 01:14:09,623 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-09 01:14:09,646 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-09 01:14:09,647 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-09 01:14:09,647 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-09 01:14:09,647 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-09 01:14:09,647 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-09 01:14:09,647 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-09 01:14:09,648 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-09 01:14:09,648 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-09 01:14:09,648 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-09 01:14:09,648 INFO L153 SettingsManager]: * Use SBE=true [2025-03-09 01:14:09,648 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-09 01:14:09,648 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-09 01:14:09,648 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-09 01:14:09,648 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-09 01:14:09,648 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-09 01:14:09,648 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-09 01:14:09,648 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-09 01:14:09,648 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-09 01:14:09,648 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-09 01:14:09,648 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-09 01:14:09,648 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2025-03-09 01:14:09,648 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2025-03-09 01:14:09,649 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-09 01:14:09,649 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-09 01:14:09,649 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-09 01:14:09,649 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-09 01:14:09,649 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-09 01:14:09,649 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-09 01:14:09,649 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-09 01:14:09,649 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-09 01:14:09,649 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-09 01:14:09,649 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-09 01:14:09,649 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-09 01:14:09,649 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2025-03-09 01:14:09,649 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2025-03-09 01:14:09,649 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-09 01:14:09,649 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-09 01:14:09,649 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-09 01:14:09,649 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-09 01:14:09,649 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 -> 085e9170c725dbfce47ad23ff96af1e2e4188372955794675158fde45968fe8a [2025-03-09 01:14:09,881 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-09 01:14:09,890 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-09 01:14:09,892 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-09 01:14:09,894 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-09 01:14:09,895 INFO L274 PluginConnector]: CDTParser initialized [2025-03-09 01:14:09,896 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/09-regions_24-evilcollapse_nr.i [2025-03-09 01:14:11,105 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59393ceb2/2351acf119cf4996a3f9df5f1a4e5b58/FLAG8e7ed4a7e [2025-03-09 01:14:11,347 INFO L384 CDTParser]: Found 1 translation units. [2025-03-09 01:14:11,348 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_24-evilcollapse_nr.i [2025-03-09 01:14:11,365 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59393ceb2/2351acf119cf4996a3f9df5f1a4e5b58/FLAG8e7ed4a7e [2025-03-09 01:14:11,382 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59393ceb2/2351acf119cf4996a3f9df5f1a4e5b58 [2025-03-09 01:14:11,387 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-09 01:14:11,389 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-09 01:14:11,389 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-09 01:14:11,390 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-09 01:14:11,393 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-09 01:14:11,394 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.03 01:14:11" (1/1) ... [2025-03-09 01:14:11,396 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a6a42a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:14:11, skipping insertion in model container [2025-03-09 01:14:11,396 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.03 01:14:11" (1/1) ... [2025-03-09 01:14:11,433 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-09 01:14:11,710 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:14:11,710 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:14:11,711 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:14:11,711 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:14:11,734 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-09 01:14:11,770 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2025-03-09 01:14:11,783 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-09 01:14:11,815 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:14:11,816 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:14:11,816 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:14:11,816 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:14:11,829 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-09 01:14:11,844 INFO L200 MainTranslator]: Completed pre-run [2025-03-09 01:14:11,872 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:14:11,873 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:14:11,873 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:14:11,873 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:14:11,881 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-09 01:14:11,935 INFO L204 MainTranslator]: Completed translation [2025-03-09 01:14:11,936 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:14:11 WrapperNode [2025-03-09 01:14:11,936 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-09 01:14:11,937 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-09 01:14:11,937 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-09 01:14:11,937 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-09 01:14:11,941 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:14:11" (1/1) ... [2025-03-09 01:14:11,955 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:14:11" (1/1) ... [2025-03-09 01:14:11,982 INFO L138 Inliner]: procedures = 276, calls = 101, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 206 [2025-03-09 01:14:11,982 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-09 01:14:11,983 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-09 01:14:11,983 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-09 01:14:11,983 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-09 01:14:11,989 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:14:11" (1/1) ... [2025-03-09 01:14:11,989 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:14:11" (1/1) ... [2025-03-09 01:14:11,995 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:14:11" (1/1) ... [2025-03-09 01:14:12,026 INFO L175 MemorySlicer]: Split 86 memory accesses to 1 slices as follows [86]. 100 percent of accesses are in the largest equivalence class. The 70 initializations are split as follows [70]. The 10 writes are split as follows [10]. [2025-03-09 01:14:12,026 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:14:11" (1/1) ... [2025-03-09 01:14:12,026 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:14:11" (1/1) ... [2025-03-09 01:14:12,046 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:14:11" (1/1) ... [2025-03-09 01:14:12,047 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:14:11" (1/1) ... [2025-03-09 01:14:12,049 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:14:11" (1/1) ... [2025-03-09 01:14:12,051 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:14:11" (1/1) ... [2025-03-09 01:14:12,053 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-09 01:14:12,054 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-09 01:14:12,054 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-09 01:14:12,054 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-09 01:14:12,055 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:14:11" (1/1) ... [2025-03-09 01:14:12,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-09 01:14:12,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:14:12,086 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) [2025-03-09 01:14:12,092 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 [2025-03-09 01:14:12,107 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2025-03-09 01:14:12,107 INFO L130 BoogieDeclarations]: Found specification of procedure f [2025-03-09 01:14:12,107 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2025-03-09 01:14:12,107 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-03-09 01:14:12,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2025-03-09 01:14:12,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2025-03-09 01:14:12,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#0 [2025-03-09 01:14:12,108 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-03-09 01:14:12,108 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-03-09 01:14:12,108 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-09 01:14:12,108 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-09 01:14:12,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-03-09 01:14:12,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-09 01:14:12,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-09 01:14:12,110 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-09 01:14:12,261 INFO L256 CfgBuilder]: Building ICFG [2025-03-09 01:14:12,262 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-09 01:14:12,835 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-09 01:14:12,835 INFO L307 CfgBuilder]: Performing block encoding [2025-03-09 01:14:14,125 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-09 01:14:14,126 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-09 01:14:14,126 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.03 01:14:14 BoogieIcfgContainer [2025-03-09 01:14:14,127 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-09 01:14:14,129 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-09 01:14:14,129 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-09 01:14:14,134 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-09 01:14:14,134 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.03 01:14:11" (1/3) ... [2025-03-09 01:14:14,135 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b980d94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.03 01:14:14, skipping insertion in model container [2025-03-09 01:14:14,136 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:14:11" (2/3) ... [2025-03-09 01:14:14,137 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b980d94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.03 01:14:14, skipping insertion in model container [2025-03-09 01:14:14,137 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.03 01:14:14" (3/3) ... [2025-03-09 01:14:14,138 INFO L128 eAbstractionObserver]: Analyzing ICFG 09-regions_24-evilcollapse_nr.i [2025-03-09 01:14:14,150 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-09 01:14:14,152 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 09-regions_24-evilcollapse_nr.i that has 2 procedures, 68 locations, 1 initial locations, 4 loop locations, and 33 error locations. [2025-03-09 01:14:14,153 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-09 01:14:14,223 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-03-09 01:14:14,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 94 transitions, 196 flow [2025-03-09 01:14:14,302 INFO L124 PetriNetUnfolderBase]: 7/92 cut-off events. [2025-03-09 01:14:14,306 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-09 01:14:14,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 92 events. 7/92 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 341 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 69. Up to 2 conditions per place. [2025-03-09 01:14:14,309 INFO L82 GeneralOperation]: Start removeDead. Operand has 94 places, 94 transitions, 196 flow [2025-03-09 01:14:14,313 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 92 places, 92 transitions, 190 flow [2025-03-09 01:14:14,325 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-09 01:14:14,340 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;@59e5565, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-09 01:14:14,341 INFO L334 AbstractCegarLoop]: Starting to check reachability of 51 error locations. [2025-03-09 01:14:14,351 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-09 01:14:14,354 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2025-03-09 01:14:14,354 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-09 01:14:14,354 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:14:14,355 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-09 01:14:14,355 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-03-09 01:14:14,360 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:14:14,360 INFO L85 PathProgramCache]: Analyzing trace with hash 577737, now seen corresponding path program 1 times [2025-03-09 01:14:14,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:14:14,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2075798189] [2025-03-09 01:14:14,369 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:14:14,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:14:14,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:14:14,372 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) [2025-03-09 01:14:14,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-09 01:14:14,455 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-09 01:14:14,578 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-09 01:14:14,579 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:14:14,579 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:14:14,597 INFO L256 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-09 01:14:14,599 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:14:14,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:14:14,670 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:14:14,670 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:14:14,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075798189] [2025-03-09 01:14:14,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075798189] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:14:14,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:14:14,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-09 01:14:14,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084889643] [2025-03-09 01:14:14,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:14:14,680 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 01:14:14,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:14:14,701 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 01:14:14,702 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-09 01:14:14,832 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 94 [2025-03-09 01:14:14,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 92 transitions, 190 flow. Second operand has 4 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:14:14,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:14:14,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 94 [2025-03-09 01:14:14,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:14:15,137 INFO L124 PetriNetUnfolderBase]: 390/871 cut-off events. [2025-03-09 01:14:15,137 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-09 01:14:15,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1505 conditions, 871 events. 390/871 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5030 event pairs, 287 based on Foata normal form. 1/729 useless extension candidates. Maximal degree in co-relation 1440. Up to 611 conditions per place. [2025-03-09 01:14:15,148 INFO L140 encePairwiseOnDemand]: 85/94 looper letters, 37 selfloop transitions, 3 changer transitions 0/86 dead transitions. [2025-03-09 01:14:15,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 86 transitions, 258 flow [2025-03-09 01:14:15,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 01:14:15,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 01:14:15,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 238 transitions. [2025-03-09 01:14:15,159 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6329787234042553 [2025-03-09 01:14:15,161 INFO L175 Difference]: Start difference. First operand has 92 places, 92 transitions, 190 flow. Second operand 4 states and 238 transitions. [2025-03-09 01:14:15,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 86 transitions, 258 flow [2025-03-09 01:14:15,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 86 transitions, 256 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-09 01:14:15,167 INFO L231 Difference]: Finished difference. Result has 87 places, 86 transitions, 182 flow [2025-03-09 01:14:15,170 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=182, PETRI_PLACES=87, PETRI_TRANSITIONS=86} [2025-03-09 01:14:15,172 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, -5 predicate places. [2025-03-09 01:14:15,174 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 86 transitions, 182 flow [2025-03-09 01:14:15,174 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:14:15,174 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:14:15,174 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-09 01:14:15,186 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-09 01:14:15,379 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 [2025-03-09 01:14:15,379 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-03-09 01:14:15,380 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:14:15,380 INFO L85 PathProgramCache]: Analyzing trace with hash 577738, now seen corresponding path program 1 times [2025-03-09 01:14:15,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:14:15,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1160196312] [2025-03-09 01:14:15,380 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:14:15,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:14:15,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:14:15,383 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) [2025-03-09 01:14:15,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-09 01:14:15,440 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-09 01:14:15,588 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-09 01:14:15,588 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:14:15,588 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:14:15,606 INFO L256 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-09 01:14:15,607 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:14:15,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:14:15,644 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:14:15,644 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:14:15,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160196312] [2025-03-09 01:14:15,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160196312] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:14:15,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:14:15,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-09 01:14:15,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490039385] [2025-03-09 01:14:15,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:14:15,645 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 01:14:15,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:14:15,646 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 01:14:15,646 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-09 01:14:15,841 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 94 [2025-03-09 01:14:15,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 86 transitions, 182 flow. Second operand has 4 states, 4 states have (on average 52.75) internal successors, (211), 4 states have internal predecessors, (211), 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) [2025-03-09 01:14:15,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:14:15,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 94 [2025-03-09 01:14:15,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:14:16,129 INFO L124 PetriNetUnfolderBase]: 391/876 cut-off events. [2025-03-09 01:14:16,130 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-09 01:14:16,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1520 conditions, 876 events. 391/876 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4961 event pairs, 287 based on Foata normal form. 3/737 useless extension candidates. Maximal degree in co-relation 1492. Up to 616 conditions per place. [2025-03-09 01:14:16,136 INFO L140 encePairwiseOnDemand]: 86/94 looper letters, 41 selfloop transitions, 5 changer transitions 0/90 dead transitions. [2025-03-09 01:14:16,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 90 transitions, 286 flow [2025-03-09 01:14:16,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 01:14:16,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 01:14:16,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 257 transitions. [2025-03-09 01:14:16,138 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6835106382978723 [2025-03-09 01:14:16,138 INFO L175 Difference]: Start difference. First operand has 87 places, 86 transitions, 182 flow. Second operand 4 states and 257 transitions. [2025-03-09 01:14:16,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 90 transitions, 286 flow [2025-03-09 01:14:16,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 90 transitions, 276 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-09 01:14:16,143 INFO L231 Difference]: Finished difference. Result has 89 places, 90 transitions, 215 flow [2025-03-09 01:14:16,144 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=215, PETRI_PLACES=89, PETRI_TRANSITIONS=90} [2025-03-09 01:14:16,144 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, -3 predicate places. [2025-03-09 01:14:16,145 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 90 transitions, 215 flow [2025-03-09 01:14:16,146 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.75) internal successors, (211), 4 states have internal predecessors, (211), 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) [2025-03-09 01:14:16,146 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:14:16,146 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-03-09 01:14:16,157 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-09 01:14:16,350 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 [2025-03-09 01:14:16,350 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-03-09 01:14:16,350 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:14:16,351 INFO L85 PathProgramCache]: Analyzing trace with hash 31992859, now seen corresponding path program 1 times [2025-03-09 01:14:16,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:14:16,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1445711754] [2025-03-09 01:14:16,351 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:14:16,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:14:16,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:14:16,353 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) [2025-03-09 01:14:16,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-09 01:14:16,418 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-09 01:14:16,523 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-09 01:14:16,523 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:14:16,523 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:14:16,539 INFO L256 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-09 01:14:16,540 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:14:16,560 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 [2025-03-09 01:14:16,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:14:16,564 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:14:16,564 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:14:16,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445711754] [2025-03-09 01:14:16,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445711754] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:14:16,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:14:16,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-09 01:14:16,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719651060] [2025-03-09 01:14:16,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:14:16,565 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-09 01:14:16,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:14:16,566 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-09 01:14:16,566 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-09 01:14:16,622 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 94 [2025-03-09 01:14:16,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 90 transitions, 215 flow. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 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) [2025-03-09 01:14:16,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:14:16,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 94 [2025-03-09 01:14:16,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:14:16,854 INFO L124 PetriNetUnfolderBase]: 391/875 cut-off events. [2025-03-09 01:14:16,855 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-09 01:14:16,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1528 conditions, 875 events. 391/875 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4966 event pairs, 287 based on Foata normal form. 0/732 useless extension candidates. Maximal degree in co-relation 1498. Up to 612 conditions per place. [2025-03-09 01:14:16,859 INFO L140 encePairwiseOnDemand]: 91/94 looper letters, 39 selfloop transitions, 3 changer transitions 0/89 dead transitions. [2025-03-09 01:14:16,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 89 transitions, 297 flow [2025-03-09 01:14:16,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-09 01:14:16,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-09 01:14:16,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 204 transitions. [2025-03-09 01:14:16,862 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.723404255319149 [2025-03-09 01:14:16,862 INFO L175 Difference]: Start difference. First operand has 89 places, 90 transitions, 215 flow. Second operand 3 states and 204 transitions. [2025-03-09 01:14:16,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 89 transitions, 297 flow [2025-03-09 01:14:16,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 89 transitions, 294 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-09 01:14:16,864 INFO L231 Difference]: Finished difference. Result has 89 places, 89 transitions, 216 flow [2025-03-09 01:14:16,865 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=89, PETRI_TRANSITIONS=89} [2025-03-09 01:14:16,865 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, -3 predicate places. [2025-03-09 01:14:16,865 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 89 transitions, 216 flow [2025-03-09 01:14:16,865 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 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) [2025-03-09 01:14:16,865 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:14:16,865 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-03-09 01:14:16,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-09 01:14:17,070 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 [2025-03-09 01:14:17,070 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-03-09 01:14:17,071 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:14:17,071 INFO L85 PathProgramCache]: Analyzing trace with hash 31992860, now seen corresponding path program 1 times [2025-03-09 01:14:17,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:14:17,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [594204127] [2025-03-09 01:14:17,071 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:14:17,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:14:17,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:14:17,077 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) [2025-03-09 01:14:17,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-09 01:14:17,130 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-09 01:14:17,245 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-09 01:14:17,245 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:14:17,245 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:14:17,262 INFO L256 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-09 01:14:17,263 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:14:17,268 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 [2025-03-09 01:14:17,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:14:17,276 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:14:17,277 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:14:17,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594204127] [2025-03-09 01:14:17,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594204127] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:14:17,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:14:17,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-09 01:14:17,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143665288] [2025-03-09 01:14:17,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:14:17,278 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-09 01:14:17,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:14:17,278 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-09 01:14:17,278 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-09 01:14:17,372 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 94 [2025-03-09 01:14:17,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 89 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 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) [2025-03-09 01:14:17,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:14:17,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 94 [2025-03-09 01:14:17,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:14:17,573 INFO L124 PetriNetUnfolderBase]: 391/874 cut-off events. [2025-03-09 01:14:17,573 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-03-09 01:14:17,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1528 conditions, 874 events. 391/874 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4965 event pairs, 287 based on Foata normal form. 0/733 useless extension candidates. Maximal degree in co-relation 1497. Up to 612 conditions per place. [2025-03-09 01:14:17,578 INFO L140 encePairwiseOnDemand]: 91/94 looper letters, 39 selfloop transitions, 3 changer transitions 0/88 dead transitions. [2025-03-09 01:14:17,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 88 transitions, 298 flow [2025-03-09 01:14:17,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-09 01:14:17,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-09 01:14:17,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 204 transitions. [2025-03-09 01:14:17,580 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.723404255319149 [2025-03-09 01:14:17,580 INFO L175 Difference]: Start difference. First operand has 89 places, 89 transitions, 216 flow. Second operand 3 states and 204 transitions. [2025-03-09 01:14:17,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 88 transitions, 298 flow [2025-03-09 01:14:17,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 88 transitions, 292 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-09 01:14:17,582 INFO L231 Difference]: Finished difference. Result has 88 places, 88 transitions, 214 flow [2025-03-09 01:14:17,582 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=88, PETRI_TRANSITIONS=88} [2025-03-09 01:14:17,582 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, -4 predicate places. [2025-03-09 01:14:17,583 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 88 transitions, 214 flow [2025-03-09 01:14:17,583 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 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) [2025-03-09 01:14:17,583 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:14:17,583 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2025-03-09 01:14:17,596 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-09 01:14:17,783 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 [2025-03-09 01:14:17,784 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-03-09 01:14:17,784 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:14:17,784 INFO L85 PathProgramCache]: Analyzing trace with hash 991777628, now seen corresponding path program 1 times [2025-03-09 01:14:17,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:14:17,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1744171502] [2025-03-09 01:14:17,784 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:14:17,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:14:17,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:14:17,787 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) [2025-03-09 01:14:17,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-09 01:14:17,835 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-09 01:14:17,935 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-09 01:14:17,936 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:14:17,936 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:14:17,950 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-03-09 01:14:17,950 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:14:17,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:14:17,959 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:14:17,959 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:14:17,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744171502] [2025-03-09 01:14:17,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744171502] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:14:17,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:14:17,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-09 01:14:17,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43703778] [2025-03-09 01:14:17,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:14:17,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-09 01:14:17,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:14:17,959 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-09 01:14:17,959 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-09 01:14:17,960 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 94 [2025-03-09 01:14:17,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 88 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 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) [2025-03-09 01:14:17,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:14:17,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 94 [2025-03-09 01:14:17,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:14:18,195 INFO L124 PetriNetUnfolderBase]: 390/896 cut-off events. [2025-03-09 01:14:18,195 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-03-09 01:14:18,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1556 conditions, 896 events. 390/896 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4999 event pairs, 287 based on Foata normal form. 2/746 useless extension candidates. Maximal degree in co-relation 1528. Up to 612 conditions per place. [2025-03-09 01:14:18,200 INFO L140 encePairwiseOnDemand]: 91/94 looper letters, 43 selfloop transitions, 3 changer transitions 0/92 dead transitions. [2025-03-09 01:14:18,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 92 transitions, 318 flow [2025-03-09 01:14:18,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-09 01:14:18,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-09 01:14:18,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 212 transitions. [2025-03-09 01:14:18,201 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.75177304964539 [2025-03-09 01:14:18,201 INFO L175 Difference]: Start difference. First operand has 88 places, 88 transitions, 214 flow. Second operand 3 states and 212 transitions. [2025-03-09 01:14:18,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 92 transitions, 318 flow [2025-03-09 01:14:18,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 92 transitions, 308 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-09 01:14:18,203 INFO L231 Difference]: Finished difference. Result has 89 places, 88 transitions, 219 flow [2025-03-09 01:14:18,203 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=219, PETRI_PLACES=89, PETRI_TRANSITIONS=88} [2025-03-09 01:14:18,204 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, -3 predicate places. [2025-03-09 01:14:18,204 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 88 transitions, 219 flow [2025-03-09 01:14:18,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 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) [2025-03-09 01:14:18,204 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:14:18,204 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:14:18,215 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-09 01:14:18,404 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 [2025-03-09 01:14:18,405 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-03-09 01:14:18,406 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:14:18,406 INFO L85 PathProgramCache]: Analyzing trace with hash 991779255, now seen corresponding path program 1 times [2025-03-09 01:14:18,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:14:18,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [656865020] [2025-03-09 01:14:18,406 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:14:18,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:14:18,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:14:18,408 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) [2025-03-09 01:14:18,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-09 01:14:18,475 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-09 01:14:18,587 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-09 01:14:18,588 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:14:18,588 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:14:18,605 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-09 01:14:18,606 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:14:18,611 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 [2025-03-09 01:14:18,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:14:18,624 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:14:18,624 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:14:18,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656865020] [2025-03-09 01:14:18,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656865020] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:14:18,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:14:18,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-09 01:14:18,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341835443] [2025-03-09 01:14:18,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:14:18,625 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 01:14:18,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:14:18,625 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 01:14:18,625 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-09 01:14:18,769 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2025-03-09 01:14:18,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 88 transitions, 219 flow. Second operand has 4 states, 4 states have (on average 50.75) internal successors, (203), 4 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:14:18,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:14:18,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2025-03-09 01:14:18,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:14:19,038 INFO L124 PetriNetUnfolderBase]: 390/892 cut-off events. [2025-03-09 01:14:19,038 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2025-03-09 01:14:19,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1558 conditions, 892 events. 390/892 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4984 event pairs, 287 based on Foata normal form. 0/746 useless extension candidates. Maximal degree in co-relation 1527. Up to 614 conditions per place. [2025-03-09 01:14:19,043 INFO L140 encePairwiseOnDemand]: 87/94 looper letters, 37 selfloop transitions, 7 changer transitions 0/86 dead transitions. [2025-03-09 01:14:19,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 86 transitions, 303 flow [2025-03-09 01:14:19,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-09 01:14:19,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-09 01:14:19,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 287 transitions. [2025-03-09 01:14:19,045 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6106382978723405 [2025-03-09 01:14:19,045 INFO L175 Difference]: Start difference. First operand has 89 places, 88 transitions, 219 flow. Second operand 5 states and 287 transitions. [2025-03-09 01:14:19,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 86 transitions, 303 flow [2025-03-09 01:14:19,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 86 transitions, 300 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-09 01:14:19,046 INFO L231 Difference]: Finished difference. Result has 90 places, 86 transitions, 226 flow [2025-03-09 01:14:19,047 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=226, PETRI_PLACES=90, PETRI_TRANSITIONS=86} [2025-03-09 01:14:19,047 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, -2 predicate places. [2025-03-09 01:14:19,047 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 86 transitions, 226 flow [2025-03-09 01:14:19,047 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.75) internal successors, (203), 4 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:14:19,047 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:14:19,048 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:14:19,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-09 01:14:19,252 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 [2025-03-09 01:14:19,252 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-03-09 01:14:19,252 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:14:19,252 INFO L85 PathProgramCache]: Analyzing trace with hash 991779256, now seen corresponding path program 1 times [2025-03-09 01:14:19,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:14:19,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [636976893] [2025-03-09 01:14:19,253 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:14:19,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:14:19,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:14:19,255 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) [2025-03-09 01:14:19,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-09 01:14:19,326 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-09 01:14:19,457 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-09 01:14:19,457 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:14:19,457 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:14:19,472 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-09 01:14:19,474 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:14:19,478 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 [2025-03-09 01:14:19,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:14:19,506 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:14:19,506 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:14:19,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636976893] [2025-03-09 01:14:19,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636976893] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:14:19,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:14:19,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-09 01:14:19,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095701954] [2025-03-09 01:14:19,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:14:19,507 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 01:14:19,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:14:19,507 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 01:14:19,507 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-09 01:14:19,667 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 94 [2025-03-09 01:14:19,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 86 transitions, 226 flow. Second operand has 4 states, 4 states have (on average 52.5) internal successors, (210), 4 states have internal predecessors, (210), 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) [2025-03-09 01:14:19,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:14:19,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 94 [2025-03-09 01:14:19,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:14:19,905 INFO L124 PetriNetUnfolderBase]: 390/888 cut-off events. [2025-03-09 01:14:19,905 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2025-03-09 01:14:19,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1562 conditions, 888 events. 390/888 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4982 event pairs, 287 based on Foata normal form. 4/746 useless extension candidates. Maximal degree in co-relation 1526. Up to 616 conditions per place. [2025-03-09 01:14:19,909 INFO L140 encePairwiseOnDemand]: 89/94 looper letters, 40 selfloop transitions, 4 changer transitions 0/84 dead transitions. [2025-03-09 01:14:19,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 84 transitions, 310 flow [2025-03-09 01:14:19,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 01:14:19,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 01:14:19,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 246 transitions. [2025-03-09 01:14:19,911 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6542553191489362 [2025-03-09 01:14:19,911 INFO L175 Difference]: Start difference. First operand has 90 places, 86 transitions, 226 flow. Second operand 4 states and 246 transitions. [2025-03-09 01:14:19,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 84 transitions, 310 flow [2025-03-09 01:14:19,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 84 transitions, 296 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-09 01:14:19,915 INFO L231 Difference]: Finished difference. Result has 87 places, 84 transitions, 216 flow [2025-03-09 01:14:19,915 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=216, PETRI_PLACES=87, PETRI_TRANSITIONS=84} [2025-03-09 01:14:19,915 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, -5 predicate places. [2025-03-09 01:14:19,916 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 84 transitions, 216 flow [2025-03-09 01:14:19,916 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.5) internal successors, (210), 4 states have internal predecessors, (210), 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) [2025-03-09 01:14:19,916 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:14:19,917 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:14:19,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-09 01:14:20,117 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 [2025-03-09 01:14:20,117 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-03-09 01:14:20,118 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:14:20,118 INFO L85 PathProgramCache]: Analyzing trace with hash -382860172, now seen corresponding path program 1 times [2025-03-09 01:14:20,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:14:20,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1708081084] [2025-03-09 01:14:20,118 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:14:20,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:14:20,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:14:20,120 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) [2025-03-09 01:14:20,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-09 01:14:20,189 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-09 01:14:20,321 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-09 01:14:20,321 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:14:20,321 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:14:20,337 INFO L256 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-09 01:14:20,339 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:14:20,378 INFO L349 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2025-03-09 01:14:20,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2025-03-09 01:14:20,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:14:20,450 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:14:20,450 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:14:20,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708081084] [2025-03-09 01:14:20,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708081084] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:14:20,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:14:20,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-09 01:14:20,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613621711] [2025-03-09 01:14:20,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:14:20,451 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-09 01:14:20,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:14:20,451 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-09 01:14:20,451 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-09 01:14:20,691 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 94 [2025-03-09 01:14:20,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 84 transitions, 216 flow. Second operand has 6 states, 6 states have (on average 49.5) internal successors, (297), 6 states have internal predecessors, (297), 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) [2025-03-09 01:14:20,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:14:20,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 94 [2025-03-09 01:14:20,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:14:20,887 INFO L124 PetriNetUnfolderBase]: 390/884 cut-off events. [2025-03-09 01:14:20,887 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-03-09 01:14:20,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1556 conditions, 884 events. 390/884 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4932 event pairs, 287 based on Foata normal form. 2/744 useless extension candidates. Maximal degree in co-relation 1524. Up to 618 conditions per place. [2025-03-09 01:14:20,891 INFO L140 encePairwiseOnDemand]: 89/94 looper letters, 40 selfloop transitions, 4 changer transitions 0/82 dead transitions. [2025-03-09 01:14:20,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 82 transitions, 300 flow [2025-03-09 01:14:20,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 01:14:20,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 01:14:20,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 234 transitions. [2025-03-09 01:14:20,893 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6223404255319149 [2025-03-09 01:14:20,893 INFO L175 Difference]: Start difference. First operand has 87 places, 84 transitions, 216 flow. Second operand 4 states and 234 transitions. [2025-03-09 01:14:20,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 82 transitions, 300 flow [2025-03-09 01:14:20,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 82 transitions, 292 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-09 01:14:20,895 INFO L231 Difference]: Finished difference. Result has 85 places, 82 transitions, 212 flow [2025-03-09 01:14:20,895 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=212, PETRI_PLACES=85, PETRI_TRANSITIONS=82} [2025-03-09 01:14:20,896 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, -7 predicate places. [2025-03-09 01:14:20,896 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 82 transitions, 212 flow [2025-03-09 01:14:20,896 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 49.5) internal successors, (297), 6 states have internal predecessors, (297), 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) [2025-03-09 01:14:20,896 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:14:20,896 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:14:20,909 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-09 01:14:21,096 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 [2025-03-09 01:14:21,097 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-03-09 01:14:21,097 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:14:21,097 INFO L85 PathProgramCache]: Analyzing trace with hash -382860171, now seen corresponding path program 1 times [2025-03-09 01:14:21,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:14:21,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1677891864] [2025-03-09 01:14:21,098 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:14:21,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:14:21,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:14:21,100 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) [2025-03-09 01:14:21,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-09 01:14:21,159 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-09 01:14:21,297 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-09 01:14:21,297 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:14:21,297 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:14:21,314 INFO L256 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-09 01:14:21,316 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:14:21,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-09 01:14:21,412 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 [2025-03-09 01:14:21,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:14:21,465 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:14:21,465 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:14:21,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677891864] [2025-03-09 01:14:21,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677891864] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:14:21,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:14:21,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-09 01:14:21,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33123634] [2025-03-09 01:14:21,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:14:21,465 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-09 01:14:21,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:14:21,466 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-09 01:14:21,466 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-09 01:14:21,659 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 94 [2025-03-09 01:14:21,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 82 transitions, 212 flow. Second operand has 5 states, 5 states have (on average 51.4) internal successors, (257), 5 states have internal predecessors, (257), 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) [2025-03-09 01:14:21,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:14:21,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 94 [2025-03-09 01:14:21,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:14:21,939 INFO L124 PetriNetUnfolderBase]: 391/914 cut-off events. [2025-03-09 01:14:21,940 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2025-03-09 01:14:21,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1603 conditions, 914 events. 391/914 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5268 event pairs, 287 based on Foata normal form. 2/760 useless extension candidates. Maximal degree in co-relation 1515. Up to 620 conditions per place. [2025-03-09 01:14:21,943 INFO L140 encePairwiseOnDemand]: 88/94 looper letters, 46 selfloop transitions, 5 changer transitions 0/89 dead transitions. [2025-03-09 01:14:21,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 89 transitions, 344 flow [2025-03-09 01:14:21,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 01:14:21,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 01:14:21,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 250 transitions. [2025-03-09 01:14:21,946 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6648936170212766 [2025-03-09 01:14:21,947 INFO L175 Difference]: Start difference. First operand has 85 places, 82 transitions, 212 flow. Second operand 4 states and 250 transitions. [2025-03-09 01:14:21,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 89 transitions, 344 flow [2025-03-09 01:14:21,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 89 transitions, 330 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-09 01:14:21,949 INFO L231 Difference]: Finished difference. Result has 87 places, 86 transitions, 250 flow [2025-03-09 01:14:21,949 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=250, PETRI_PLACES=87, PETRI_TRANSITIONS=86} [2025-03-09 01:14:21,950 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, -5 predicate places. [2025-03-09 01:14:21,950 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 86 transitions, 250 flow [2025-03-09 01:14:21,950 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 51.4) internal successors, (257), 5 states have internal predecessors, (257), 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) [2025-03-09 01:14:21,951 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:14:21,951 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:14:21,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-09 01:14:22,151 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 [2025-03-09 01:14:22,152 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-03-09 01:14:22,152 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:14:22,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1016237185, now seen corresponding path program 1 times [2025-03-09 01:14:22,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:14:22,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2046306381] [2025-03-09 01:14:22,153 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:14:22,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:14:22,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:14:22,155 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) [2025-03-09 01:14:22,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-09 01:14:22,216 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-09 01:14:22,388 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-09 01:14:22,388 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:14:22,388 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:14:22,408 INFO L256 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-09 01:14:22,410 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:14:22,478 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 [2025-03-09 01:14:22,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2025-03-09 01:14:22,561 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-03-09 01:14:22,561 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 [2025-03-09 01:14:22,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-09 01:14:22,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-09 01:14:22,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-09 01:14:22,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:14:22,677 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:14:22,677 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:14:22,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046306381] [2025-03-09 01:14:22,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046306381] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:14:22,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:14:22,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-09 01:14:22,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329618655] [2025-03-09 01:14:22,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:14:22,678 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-09 01:14:22,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:14:22,678 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-09 01:14:22,678 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2025-03-09 01:14:23,562 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 94 [2025-03-09 01:14:23,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 86 transitions, 250 flow. Second operand has 10 states, 10 states have (on average 38.0) internal successors, (380), 10 states have internal predecessors, (380), 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) [2025-03-09 01:14:23,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:14:23,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 94 [2025-03-09 01:14:23,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:14:24,185 INFO L124 PetriNetUnfolderBase]: 391/913 cut-off events. [2025-03-09 01:14:24,186 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2025-03-09 01:14:24,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1634 conditions, 913 events. 391/913 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5221 event pairs, 287 based on Foata normal form. 0/772 useless extension candidates. Maximal degree in co-relation 1545. Up to 629 conditions per place. [2025-03-09 01:14:24,190 INFO L140 encePairwiseOnDemand]: 82/94 looper letters, 59 selfloop transitions, 11 changer transitions 0/102 dead transitions. [2025-03-09 01:14:24,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 102 transitions, 428 flow [2025-03-09 01:14:24,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-09 01:14:24,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-09 01:14:24,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 477 transitions. [2025-03-09 01:14:24,194 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46131528046421666 [2025-03-09 01:14:24,195 INFO L175 Difference]: Start difference. First operand has 87 places, 86 transitions, 250 flow. Second operand 11 states and 477 transitions. [2025-03-09 01:14:24,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 102 transitions, 428 flow [2025-03-09 01:14:24,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 102 transitions, 426 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-09 01:14:24,198 INFO L231 Difference]: Finished difference. Result has 101 places, 91 transitions, 306 flow [2025-03-09 01:14:24,198 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=306, PETRI_PLACES=101, PETRI_TRANSITIONS=91} [2025-03-09 01:14:24,198 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 9 predicate places. [2025-03-09 01:14:24,198 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 91 transitions, 306 flow [2025-03-09 01:14:24,199 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 38.0) internal successors, (380), 10 states have internal predecessors, (380), 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) [2025-03-09 01:14:24,199 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:14:24,201 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:14:24,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-09 01:14:24,401 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 [2025-03-09 01:14:24,402 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-03-09 01:14:24,402 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:14:24,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1016237186, now seen corresponding path program 1 times [2025-03-09 01:14:24,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:14:24,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [851028821] [2025-03-09 01:14:24,402 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:14:24,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:14:24,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:14:24,406 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) [2025-03-09 01:14:24,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-09 01:14:24,465 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-09 01:14:24,608 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-09 01:14:24,609 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:14:24,609 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:14:24,625 INFO L256 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 36 conjuncts are in the unsatisfiable core [2025-03-09 01:14:24,627 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:14:24,693 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 [2025-03-09 01:14:24,705 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 [2025-03-09 01:14:24,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2025-03-09 01:14:24,754 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 [2025-03-09 01:14:24,804 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-03-09 01:14:24,804 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 [2025-03-09 01:14:24,817 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 [2025-03-09 01:14:24,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-09 01:14:24,867 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 [2025-03-09 01:14:24,911 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 [2025-03-09 01:14:24,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-09 01:14:24,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-09 01:14:24,951 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 [2025-03-09 01:14:25,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:14:25,007 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:14:25,007 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:14:25,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851028821] [2025-03-09 01:14:25,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851028821] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:14:25,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:14:25,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-09 01:14:25,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111952450] [2025-03-09 01:14:25,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:14:25,008 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-09 01:14:25,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:14:25,008 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-09 01:14:25,008 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-03-09 01:14:25,939 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 94 [2025-03-09 01:14:25,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 91 transitions, 306 flow. Second operand has 10 states, 10 states have (on average 36.0) internal successors, (360), 10 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:14:25,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:14:25,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 94 [2025-03-09 01:14:25,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:14:26,566 INFO L124 PetriNetUnfolderBase]: 391/912 cut-off events. [2025-03-09 01:14:26,566 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2025-03-09 01:14:26,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1671 conditions, 912 events. 391/912 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5228 event pairs, 287 based on Foata normal form. 1/775 useless extension candidates. Maximal degree in co-relation 1594. Up to 633 conditions per place. [2025-03-09 01:14:26,571 INFO L140 encePairwiseOnDemand]: 82/94 looper letters, 61 selfloop transitions, 11 changer transitions 0/102 dead transitions. [2025-03-09 01:14:26,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 102 transitions, 480 flow [2025-03-09 01:14:26,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-09 01:14:26,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-09 01:14:26,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 457 transitions. [2025-03-09 01:14:26,573 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44197292069632493 [2025-03-09 01:14:26,573 INFO L175 Difference]: Start difference. First operand has 101 places, 91 transitions, 306 flow. Second operand 11 states and 457 transitions. [2025-03-09 01:14:26,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 102 transitions, 480 flow [2025-03-09 01:14:26,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 102 transitions, 476 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-09 01:14:26,576 INFO L231 Difference]: Finished difference. Result has 110 places, 91 transitions, 328 flow [2025-03-09 01:14:26,576 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=328, PETRI_PLACES=110, PETRI_TRANSITIONS=91} [2025-03-09 01:14:26,577 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 18 predicate places. [2025-03-09 01:14:26,577 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 91 transitions, 328 flow [2025-03-09 01:14:26,578 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 36.0) internal successors, (360), 10 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:14:26,578 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:14:26,578 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:14:26,590 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-09 01:14:26,778 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 [2025-03-09 01:14:26,779 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-03-09 01:14:26,779 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:14:26,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1438582184, now seen corresponding path program 1 times [2025-03-09 01:14:26,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:14:26,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2105240505] [2025-03-09 01:14:26,779 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:14:26,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:14:26,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:14:26,781 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) [2025-03-09 01:14:26,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-09 01:14:26,852 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-09 01:14:26,977 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-09 01:14:26,978 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:14:26,978 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:14:26,995 INFO L256 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-09 01:14:26,996 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:14:26,999 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 [2025-03-09 01:14:27,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:14:27,030 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:14:27,030 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:14:27,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105240505] [2025-03-09 01:14:27,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105240505] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:14:27,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:14:27,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-09 01:14:27,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90005468] [2025-03-09 01:14:27,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:14:27,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 01:14:27,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:14:27,031 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 01:14:27,031 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-09 01:14:27,152 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 94 [2025-03-09 01:14:27,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 91 transitions, 328 flow. Second operand has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 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) [2025-03-09 01:14:27,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:14:27,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 94 [2025-03-09 01:14:27,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:14:27,326 INFO L124 PetriNetUnfolderBase]: 391/904 cut-off events. [2025-03-09 01:14:27,326 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2025-03-09 01:14:27,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1650 conditions, 904 events. 391/904 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5176 event pairs, 287 based on Foata normal form. 8/771 useless extension candidates. Maximal degree in co-relation 1580. Up to 613 conditions per place. [2025-03-09 01:14:27,330 INFO L140 encePairwiseOnDemand]: 89/94 looper letters, 40 selfloop transitions, 9 changer transitions 0/89 dead transitions. [2025-03-09 01:14:27,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 89 transitions, 422 flow [2025-03-09 01:14:27,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 01:14:27,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 01:14:27,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 252 transitions. [2025-03-09 01:14:27,334 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6702127659574468 [2025-03-09 01:14:27,334 INFO L175 Difference]: Start difference. First operand has 110 places, 91 transitions, 328 flow. Second operand 4 states and 252 transitions. [2025-03-09 01:14:27,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 89 transitions, 422 flow [2025-03-09 01:14:27,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 89 transitions, 400 flow, removed 0 selfloop flow, removed 10 redundant places. [2025-03-09 01:14:27,337 INFO L231 Difference]: Finished difference. Result has 101 places, 89 transitions, 320 flow [2025-03-09 01:14:27,337 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=320, PETRI_PLACES=101, PETRI_TRANSITIONS=89} [2025-03-09 01:14:27,339 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 9 predicate places. [2025-03-09 01:14:27,339 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 89 transitions, 320 flow [2025-03-09 01:14:27,339 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 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) [2025-03-09 01:14:27,339 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:14:27,339 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:14:27,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-09 01:14:27,539 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 [2025-03-09 01:14:27,540 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-03-09 01:14:27,540 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:14:27,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1438582183, now seen corresponding path program 1 times [2025-03-09 01:14:27,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:14:27,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2130867753] [2025-03-09 01:14:27,541 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:14:27,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:14:27,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:14:27,543 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) [2025-03-09 01:14:27,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-09 01:14:27,607 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-09 01:14:27,724 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-09 01:14:27,724 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:14:27,724 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:14:27,742 INFO L256 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-09 01:14:27,743 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:14:27,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:14:27,758 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:14:27,758 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:14:27,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130867753] [2025-03-09 01:14:27,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130867753] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:14:27,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:14:27,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-09 01:14:27,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736025639] [2025-03-09 01:14:27,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:14:27,758 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-09 01:14:27,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:14:27,759 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-09 01:14:27,759 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-09 01:14:27,875 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2025-03-09 01:14:27,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 89 transitions, 320 flow. Second operand has 5 states, 5 states have (on average 51.0) internal successors, (255), 5 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:14:27,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:14:27,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2025-03-09 01:14:27,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:14:28,109 INFO L124 PetriNetUnfolderBase]: 391/896 cut-off events. [2025-03-09 01:14:28,109 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2025-03-09 01:14:28,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1657 conditions, 896 events. 391/896 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5123 event pairs, 287 based on Foata normal form. 0/763 useless extension candidates. Maximal degree in co-relation 1592. Up to 615 conditions per place. [2025-03-09 01:14:28,113 INFO L140 encePairwiseOnDemand]: 88/94 looper letters, 43 selfloop transitions, 11 changer transitions 0/87 dead transitions. [2025-03-09 01:14:28,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 87 transitions, 424 flow [2025-03-09 01:14:28,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-09 01:14:28,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-09 01:14:28,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 289 transitions. [2025-03-09 01:14:28,115 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6148936170212767 [2025-03-09 01:14:28,115 INFO L175 Difference]: Start difference. First operand has 101 places, 89 transitions, 320 flow. Second operand 5 states and 289 transitions. [2025-03-09 01:14:28,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 87 transitions, 424 flow [2025-03-09 01:14:28,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 87 transitions, 406 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-09 01:14:28,117 INFO L231 Difference]: Finished difference. Result has 100 places, 87 transitions, 320 flow [2025-03-09 01:14:28,118 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=320, PETRI_PLACES=100, PETRI_TRANSITIONS=87} [2025-03-09 01:14:28,118 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 8 predicate places. [2025-03-09 01:14:28,118 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 87 transitions, 320 flow [2025-03-09 01:14:28,118 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 51.0) internal successors, (255), 5 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:14:28,119 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:14:28,119 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:14:28,131 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-09 01:14:28,319 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 [2025-03-09 01:14:28,319 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-03-09 01:14:28,320 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:14:28,320 INFO L85 PathProgramCache]: Analyzing trace with hash 717667515, now seen corresponding path program 1 times [2025-03-09 01:14:28,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:14:28,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [146126507] [2025-03-09 01:14:28,320 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:14:28,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:14:28,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:14:28,323 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) [2025-03-09 01:14:28,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-09 01:14:28,386 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-09 01:14:28,502 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-09 01:14:28,502 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:14:28,502 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:14:28,519 INFO L256 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-09 01:14:28,520 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:14:28,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:14:28,536 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:14:28,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:14:28,561 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:14:28,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146126507] [2025-03-09 01:14:28,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146126507] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:14:28,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-09 01:14:28,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2025-03-09 01:14:28,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673599923] [2025-03-09 01:14:28,561 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-09 01:14:28,561 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-09 01:14:28,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:14:28,561 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-09 01:14:28,562 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-03-09 01:14:28,562 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 94 [2025-03-09 01:14:28,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 87 transitions, 320 flow. Second operand has 6 states, 6 states have (on average 58.833333333333336) internal successors, (353), 6 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:14:28,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:14:28,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 94 [2025-03-09 01:14:28,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:14:28,853 INFO L124 PetriNetUnfolderBase]: 391/946 cut-off events. [2025-03-09 01:14:28,853 INFO L125 PetriNetUnfolderBase]: For 143/143 co-relation queries the response was YES. [2025-03-09 01:14:28,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1785 conditions, 946 events. 391/946 cut-off events. For 143/143 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5151 event pairs, 287 based on Foata normal form. 6/815 useless extension candidates. Maximal degree in co-relation 1713. Up to 609 conditions per place. [2025-03-09 01:14:28,858 INFO L140 encePairwiseOnDemand]: 90/94 looper letters, 57 selfloop transitions, 11 changer transitions 0/106 dead transitions. [2025-03-09 01:14:28,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 106 transitions, 584 flow [2025-03-09 01:14:28,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-09 01:14:28,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-09 01:14:28,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 393 transitions. [2025-03-09 01:14:28,860 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6968085106382979 [2025-03-09 01:14:28,860 INFO L175 Difference]: Start difference. First operand has 100 places, 87 transitions, 320 flow. Second operand 6 states and 393 transitions. [2025-03-09 01:14:28,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 106 transitions, 584 flow [2025-03-09 01:14:28,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 106 transitions, 530 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-09 01:14:28,863 INFO L231 Difference]: Finished difference. Result has 105 places, 92 transitions, 384 flow [2025-03-09 01:14:28,863 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=384, PETRI_PLACES=105, PETRI_TRANSITIONS=92} [2025-03-09 01:14:28,863 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 13 predicate places. [2025-03-09 01:14:28,863 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 92 transitions, 384 flow [2025-03-09 01:14:28,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 58.833333333333336) internal successors, (353), 6 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:14:28,864 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:14:28,864 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:14:28,876 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-09 01:14:29,064 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 [2025-03-09 01:14:29,064 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-03-09 01:14:29,065 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:14:29,065 INFO L85 PathProgramCache]: Analyzing trace with hash -265309501, now seen corresponding path program 1 times [2025-03-09 01:14:29,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:14:29,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2099582761] [2025-03-09 01:14:29,065 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:14:29,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:14:29,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:14:29,067 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) [2025-03-09 01:14:29,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-09 01:14:29,157 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-09 01:14:29,331 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-09 01:14:29,332 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:14:29,332 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:14:29,353 INFO L256 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-03-09 01:14:29,355 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:14:29,359 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 [2025-03-09 01:14:29,466 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 [2025-03-09 01:14:29,472 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 [2025-03-09 01:14:29,502 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-03-09 01:14:29,503 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 [2025-03-09 01:14:29,517 INFO L349 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2025-03-09 01:14:29,517 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 1 case distinctions, treesize of input 20 treesize of output 22 [2025-03-09 01:14:29,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2025-03-09 01:14:29,559 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 22 treesize of output 17 [2025-03-09 01:14:29,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2025-03-09 01:14:29,601 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 22 treesize of output 17 [2025-03-09 01:14:29,615 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 18 treesize of output 13 [2025-03-09 01:14:29,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-09 01:14:29,679 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 17 treesize of output 9 [2025-03-09 01:14:29,683 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 7 treesize of output 3 [2025-03-09 01:14:29,721 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:14:29,721 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:14:29,831 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|)))) (and (forall ((v_ArrVal_578 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_578) |c_~#c~0.base|) .cse1))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (forall ((v_ArrVal_578 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_579 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_578) |c_~#c~0.base|) .cse1)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_579) |c_~#c~0.base|) .cse1)))))) is different from false [2025-03-09 01:14:30,176 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-09 01:14:30,176 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 [2025-03-09 01:14:30,182 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-09 01:14:30,182 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 [2025-03-09 01:14:30,195 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-09 01:14:30,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 77 [2025-03-09 01:14:30,218 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-09 01:14:30,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 113 [2025-03-09 01:14:30,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2025-03-09 01:14:30,236 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 [2025-03-09 01:14:30,539 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-09 01:14:30,539 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 [2025-03-09 01:14:30,551 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-09 01:14:30,552 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 [2025-03-09 01:14:30,558 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 [2025-03-09 01:14:50,149 WARN L286 SmtUtils]: Spent 18.09s on a formula simplification that was a NOOP. DAG size: 895 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2025-03-09 01:14:50,149 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-09 01:14:50,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 19 select indices, 19 select index equivalence classes, 0 disjoint index pairs (out of 171 index pairs), introduced 19 new quantified variables, introduced 171 case distinctions, treesize of input 390 treesize of output 2062