./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 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/28-race_reach_92-evilcollapse_racing.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6efa0097353392a416215c2535cfc6cdc34364d9b0eb2844e37da9edef467642 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-09 01:17:36,281 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-09 01:17:36,340 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-09 01:17:36,344 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-09 01:17:36,344 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-09 01:17:36,362 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-09 01:17:36,363 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-09 01:17:36,364 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-09 01:17:36,364 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-09 01:17:36,364 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-09 01:17:36,365 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-09 01:17:36,365 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-09 01:17:36,365 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-09 01:17:36,365 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-09 01:17:36,366 INFO L153 SettingsManager]: * Use SBE=true [2025-03-09 01:17:36,366 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-09 01:17:36,366 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-09 01:17:36,366 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-09 01:17:36,366 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-09 01:17:36,366 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-09 01:17:36,366 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-09 01:17:36,366 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-09 01:17:36,367 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-09 01:17:36,367 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-09 01:17:36,367 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-09 01:17:36,367 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-09 01:17:36,367 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-09 01:17:36,367 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-09 01:17:36,367 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-09 01:17:36,367 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-09 01:17:36,368 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-09 01:17:36,368 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-09 01:17:36,368 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-09 01:17:36,368 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-09 01:17:36,368 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-09 01:17:36,368 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-09 01:17:36,368 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-09 01:17:36,368 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-09 01:17:36,368 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-09 01:17:36,368 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-09 01:17:36,368 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-09 01:17:36,368 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-09 01:17:36,369 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6efa0097353392a416215c2535cfc6cdc34364d9b0eb2844e37da9edef467642 [2025-03-09 01:17:36,580 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-09 01:17:36,586 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-09 01:17:36,588 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-09 01:17:36,589 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-09 01:17:36,589 INFO L274 PluginConnector]: CDTParser initialized [2025-03-09 01:17:36,590 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing.i [2025-03-09 01:17:37,729 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdb3b9ac5/0f455f476318403eb0fc5c79671c3907/FLAG874e32a2d [2025-03-09 01:17:38,006 INFO L384 CDTParser]: Found 1 translation units. [2025-03-09 01:17:38,007 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing.i [2025-03-09 01:17:38,018 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdb3b9ac5/0f455f476318403eb0fc5c79671c3907/FLAG874e32a2d [2025-03-09 01:17:38,299 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdb3b9ac5/0f455f476318403eb0fc5c79671c3907 [2025-03-09 01:17:38,302 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-09 01:17:38,303 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-09 01:17:38,305 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-09 01:17:38,305 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-09 01:17:38,308 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-09 01:17:38,308 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.03 01:17:38" (1/1) ... [2025-03-09 01:17:38,309 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54ee43b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:17:38, skipping insertion in model container [2025-03-09 01:17:38,309 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.03 01:17:38" (1/1) ... [2025-03-09 01:17:38,335 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-09 01:17:38,705 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:17:38,706 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:17:38,706 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:17:38,706 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:17:38,732 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-09 01:17:38,775 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 01:17:38,775 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@13adb009 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:17:38, skipping insertion in model container [2025-03-09 01:17:38,775 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-09 01:17:38,775 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2025-03-09 01:17:38,778 INFO L158 Benchmark]: Toolchain (without parser) took 472.87ms. Allocated memory is still 167.8MB. Free memory was 121.6MB in the beginning and 103.9MB in the end (delta: 17.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-03-09 01:17:38,778 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 201.3MB. Free memory is still 116.2MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-09 01:17:38,779 INFO L158 Benchmark]: CACSL2BoogieTranslator took 470.84ms. Allocated memory is still 167.8MB. Free memory was 120.8MB in the beginning and 103.9MB in the end (delta: 16.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-03-09 01:17:38,779 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 201.3MB. Free memory is still 116.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 470.84ms. Allocated memory is still 167.8MB. Free memory was 120.8MB in the beginning and 103.9MB in the end (delta: 16.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1051]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6efa0097353392a416215c2535cfc6cdc34364d9b0eb2844e37da9edef467642 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-09 01:17:40,559 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-09 01:17:40,638 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2025-03-09 01:17:40,645 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-09 01:17:40,646 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-09 01:17:40,663 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-09 01:17:40,664 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-09 01:17:40,664 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-09 01:17:40,664 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-09 01:17:40,664 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-09 01:17:40,665 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-09 01:17:40,665 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-09 01:17:40,665 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-09 01:17:40,665 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-09 01:17:40,665 INFO L153 SettingsManager]: * Use SBE=true [2025-03-09 01:17:40,665 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-09 01:17:40,665 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-09 01:17:40,665 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-09 01:17:40,665 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-09 01:17:40,666 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-09 01:17:40,666 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-09 01:17:40,666 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-09 01:17:40,666 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-09 01:17:40,666 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-09 01:17:40,666 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-09 01:17:40,666 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2025-03-09 01:17:40,666 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2025-03-09 01:17:40,666 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-09 01:17:40,666 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-09 01:17:40,666 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-09 01:17:40,666 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-09 01:17:40,666 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-09 01:17:40,666 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-09 01:17:40,666 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-09 01:17:40,666 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-09 01:17:40,666 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-09 01:17:40,667 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-09 01:17:40,667 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-09 01:17:40,667 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2025-03-09 01:17:40,667 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2025-03-09 01:17:40,667 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-09 01:17:40,667 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-09 01:17:40,667 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-09 01:17:40,667 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-09 01:17:40,667 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6efa0097353392a416215c2535cfc6cdc34364d9b0eb2844e37da9edef467642 [2025-03-09 01:17:40,956 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-09 01:17:40,963 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-09 01:17:40,966 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-09 01:17:40,967 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-09 01:17:40,967 INFO L274 PluginConnector]: CDTParser initialized [2025-03-09 01:17:40,968 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing.i [2025-03-09 01:17:42,172 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5132e56a7/a53fb0c536464bf68db8b2074ec49f38/FLAGe3055b716 [2025-03-09 01:17:42,423 INFO L384 CDTParser]: Found 1 translation units. [2025-03-09 01:17:42,424 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing.i [2025-03-09 01:17:42,438 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5132e56a7/a53fb0c536464bf68db8b2074ec49f38/FLAGe3055b716 [2025-03-09 01:17:42,742 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5132e56a7/a53fb0c536464bf68db8b2074ec49f38 [2025-03-09 01:17:42,744 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-09 01:17:42,745 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-09 01:17:42,746 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-09 01:17:42,746 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-09 01:17:42,750 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-09 01:17:42,750 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.03 01:17:42" (1/1) ... [2025-03-09 01:17:42,751 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@455737ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:17:42, skipping insertion in model container [2025-03-09 01:17:42,751 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.03 01:17:42" (1/1) ... [2025-03-09 01:17:42,776 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-09 01:17:43,022 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:17:43,022 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:17:43,022 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:17:43,023 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:17:43,041 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-09 01:17:43,082 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2025-03-09 01:17:43,092 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-09 01:17:43,132 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:17:43,132 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:17:43,132 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:17:43,132 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:17:43,147 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-09 01:17:43,160 INFO L200 MainTranslator]: Completed pre-run [2025-03-09 01:17:43,193 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:17:43,193 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:17:43,193 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:17:43,193 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-09 01:17:43,202 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-09 01:17:43,258 INFO L204 MainTranslator]: Completed translation [2025-03-09 01:17:43,258 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:17:43 WrapperNode [2025-03-09 01:17:43,259 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-09 01:17:43,259 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-09 01:17:43,259 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-09 01:17:43,259 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-09 01:17:43,266 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:17:43" (1/1) ... [2025-03-09 01:17:43,284 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:17:43" (1/1) ... [2025-03-09 01:17:43,307 INFO L138 Inliner]: procedures = 284, calls = 136, calls flagged for inlining = 12, calls inlined = 13, statements flattened = 290 [2025-03-09 01:17:43,308 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-09 01:17:43,308 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-09 01:17:43,309 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-09 01:17:43,309 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-09 01:17:43,317 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:17:43" (1/1) ... [2025-03-09 01:17:43,318 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:17:43" (1/1) ... [2025-03-09 01:17:43,325 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:17:43" (1/1) ... [2025-03-09 01:17:43,355 INFO L175 MemorySlicer]: Split 110 memory accesses to 4 slices as follows [2, 5, 2, 101]. 92 percent of accesses are in the largest equivalence class. The 87 initializations are split as follows [2, 5, 0, 80]. The 13 writes are split as follows [0, 0, 1, 12]. [2025-03-09 01:17:43,355 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:17:43" (1/1) ... [2025-03-09 01:17:43,355 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:17:43" (1/1) ... [2025-03-09 01:17:43,372 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:17:43" (1/1) ... [2025-03-09 01:17:43,373 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:17:43" (1/1) ... [2025-03-09 01:17:43,375 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:17:43" (1/1) ... [2025-03-09 01:17:43,378 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:17:43" (1/1) ... [2025-03-09 01:17:43,385 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-09 01:17:43,386 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-09 01:17:43,386 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-09 01:17:43,386 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-09 01:17:43,388 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:17:43" (1/1) ... [2025-03-09 01:17:43,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-09 01:17:43,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:17:43,415 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 01:17:43,439 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 01:17:43,455 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2025-03-09 01:17:43,455 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2025-03-09 01:17:43,455 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2025-03-09 01:17:43,456 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2025-03-09 01:17:43,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-09 01:17:43,456 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-03-09 01:17:43,456 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2025-03-09 01:17:43,456 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2025-03-09 01:17:43,456 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2025-03-09 01:17:43,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-09 01:17:43,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2025-03-09 01:17:43,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2025-03-09 01:17:43,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2025-03-09 01:17:43,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2025-03-09 01:17:43,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2025-03-09 01:17:43,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2025-03-09 01:17:43,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2025-03-09 01:17:43,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2025-03-09 01:17:43,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2025-03-09 01:17:43,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2025-03-09 01:17:43,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2025-03-09 01:17:43,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2025-03-09 01:17:43,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#0 [2025-03-09 01:17:43,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#1 [2025-03-09 01:17:43,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#2 [2025-03-09 01:17:43,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#3 [2025-03-09 01:17:43,456 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-03-09 01:17:43,456 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-03-09 01:17:43,457 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-09 01:17:43,457 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-09 01:17:43,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-03-09 01:17:43,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2025-03-09 01:17:43,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2025-03-09 01:17:43,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2025-03-09 01:17:43,457 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2025-03-09 01:17:43,457 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2025-03-09 01:17:43,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-09 01:17:43,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-09 01:17:43,458 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 01:17:43,608 INFO L256 CfgBuilder]: Building ICFG [2025-03-09 01:17:43,609 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-09 01:17:44,200 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L1072: havoc main_~#t_ids~0#1.base, main_~#t_ids~0#1.offset; [2025-03-09 01:17:44,201 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L1072-1: SUMMARY for call ULTIMATE.dealloc(main_~#t_ids~0#1.base, main_~#t_ids~0#1.offset); srcloc: null [2025-03-09 01:17:44,335 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-09 01:17:44,336 INFO L307 CfgBuilder]: Performing block encoding [2025-03-09 01:17:45,903 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-09 01:17:45,904 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-09 01:17:45,904 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.03 01:17:45 BoogieIcfgContainer [2025-03-09 01:17:45,904 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-09 01:17:45,906 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-09 01:17:45,906 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-09 01:17:45,910 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-09 01:17:45,910 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.03 01:17:42" (1/3) ... [2025-03-09 01:17:45,911 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c52cf4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.03 01:17:45, skipping insertion in model container [2025-03-09 01:17:45,911 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:17:43" (2/3) ... [2025-03-09 01:17:45,911 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c52cf4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.03 01:17:45, skipping insertion in model container [2025-03-09 01:17:45,911 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.03 01:17:45" (3/3) ... [2025-03-09 01:17:45,912 INFO L128 eAbstractionObserver]: Analyzing ICFG 28-race_reach_92-evilcollapse_racing.i [2025-03-09 01:17:45,924 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-09 01:17:45,927 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 28-race_reach_92-evilcollapse_racing.i that has 2 procedures, 114 locations, 1 initial locations, 10 loop locations, and 48 error locations. [2025-03-09 01:17:45,927 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-09 01:17:45,985 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2025-03-09 01:17:46,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 132 transitions, 271 flow [2025-03-09 01:17:46,058 INFO L124 PetriNetUnfolderBase]: 18/144 cut-off events. [2025-03-09 01:17:46,059 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-03-09 01:17:46,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 144 events. 18/144 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 529 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 81. Up to 4 conditions per place. [2025-03-09 01:17:46,062 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 132 transitions, 271 flow [2025-03-09 01:17:46,066 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 132 transitions, 271 flow [2025-03-09 01:17:46,075 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-09 01:17:46,085 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;@56f726b3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-09 01:17:46,085 INFO L334 AbstractCegarLoop]: Starting to check reachability of 64 error locations. [2025-03-09 01:17:46,094 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-09 01:17:46,094 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2025-03-09 01:17:46,094 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-09 01:17:46,094 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:17:46,094 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-09 01:17:46,095 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-09 01:17:46,099 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:17:46,099 INFO L85 PathProgramCache]: Analyzing trace with hash 802469, now seen corresponding path program 1 times [2025-03-09 01:17:46,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:17:46,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1508267158] [2025-03-09 01:17:46,110 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:17:46,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:46,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:17:46,114 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 01:17:46,115 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 01:17:46,211 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-09 01:17:46,360 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-09 01:17:46,361 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:17:46,361 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:17:46,384 INFO L256 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-09 01:17:46,387 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:17:46,436 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 01:17:46,436 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:17:46,437 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:17:46,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508267158] [2025-03-09 01:17:46,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508267158] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:17:46,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:17:46,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-09 01:17:46,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416901826] [2025-03-09 01:17:46,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:17:46,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 01:17:46,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:17:46,461 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 01:17:46,462 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-09 01:17:46,700 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 132 [2025-03-09 01:17:46,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 132 transitions, 271 flow. Second operand has 4 states, 4 states have (on average 69.75) internal successors, (279), 4 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:46,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:17:46,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 132 [2025-03-09 01:17:46,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:17:47,006 INFO L124 PetriNetUnfolderBase]: 120/455 cut-off events. [2025-03-09 01:17:47,006 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-09 01:17:47,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 723 conditions, 455 events. 120/455 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2313 event pairs, 61 based on Foata normal form. 47/416 useless extension candidates. Maximal degree in co-relation 636. Up to 170 conditions per place. [2025-03-09 01:17:47,010 INFO L140 encePairwiseOnDemand]: 111/132 looper letters, 64 selfloop transitions, 4 changer transitions 0/137 dead transitions. [2025-03-09 01:17:47,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 137 transitions, 417 flow [2025-03-09 01:17:47,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 01:17:47,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 01:17:47,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 373 transitions. [2025-03-09 01:17:47,022 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7064393939393939 [2025-03-09 01:17:47,024 INFO L175 Difference]: Start difference. First operand has 117 places, 132 transitions, 271 flow. Second operand 4 states and 373 transitions. [2025-03-09 01:17:47,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 137 transitions, 417 flow [2025-03-09 01:17:47,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 137 transitions, 417 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-09 01:17:47,031 INFO L231 Difference]: Finished difference. Result has 116 places, 115 transitions, 251 flow [2025-03-09 01:17:47,033 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=251, PETRI_PLACES=116, PETRI_TRANSITIONS=115} [2025-03-09 01:17:47,035 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, -1 predicate places. [2025-03-09 01:17:47,037 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 115 transitions, 251 flow [2025-03-09 01:17:47,037 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.75) internal successors, (279), 4 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:47,037 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:17:47,037 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-09 01:17:47,050 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 01:17:47,242 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 01:17:47,242 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-09 01:17:47,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:17:47,242 INFO L85 PathProgramCache]: Analyzing trace with hash 802470, now seen corresponding path program 1 times [2025-03-09 01:17:47,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:17:47,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [264727777] [2025-03-09 01:17:47,244 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:17:47,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:47,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:17:47,247 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 01:17:47,248 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 01:17:47,329 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-09 01:17:47,495 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-09 01:17:47,495 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:17:47,495 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:17:47,515 INFO L256 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-09 01:17:47,517 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:17:47,561 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 01:17:47,561 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:17:47,562 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:17:47,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264727777] [2025-03-09 01:17:47,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264727777] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:17:47,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:17:47,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-09 01:17:47,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368052287] [2025-03-09 01:17:47,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:17:47,563 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 01:17:47,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:17:47,563 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 01:17:47,564 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-09 01:17:47,799 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 132 [2025-03-09 01:17:47,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 115 transitions, 251 flow. Second operand has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:47,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:17:47,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 132 [2025-03-09 01:17:47,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:17:48,093 INFO L124 PetriNetUnfolderBase]: 122/503 cut-off events. [2025-03-09 01:17:48,093 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2025-03-09 01:17:48,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 829 conditions, 503 events. 122/503 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2557 event pairs, 100 based on Foata normal form. 3/412 useless extension candidates. Maximal degree in co-relation 720. Up to 263 conditions per place. [2025-03-09 01:17:48,097 INFO L140 encePairwiseOnDemand]: 124/132 looper letters, 46 selfloop transitions, 5 changer transitions 0/119 dead transitions. [2025-03-09 01:17:48,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 119 transitions, 367 flow [2025-03-09 01:17:48,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 01:17:48,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 01:17:48,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 342 transitions. [2025-03-09 01:17:48,099 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6477272727272727 [2025-03-09 01:17:48,099 INFO L175 Difference]: Start difference. First operand has 116 places, 115 transitions, 251 flow. Second operand 4 states and 342 transitions. [2025-03-09 01:17:48,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 119 transitions, 367 flow [2025-03-09 01:17:48,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 119 transitions, 355 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-09 01:17:48,104 INFO L231 Difference]: Finished difference. Result has 118 places, 119 transitions, 284 flow [2025-03-09 01:17:48,105 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=284, PETRI_PLACES=118, PETRI_TRANSITIONS=119} [2025-03-09 01:17:48,106 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 1 predicate places. [2025-03-09 01:17:48,107 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 119 transitions, 284 flow [2025-03-09 01:17:48,107 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:48,107 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:17:48,107 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-03-09 01:17:48,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-09 01:17:48,308 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 01:17:48,308 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-09 01:17:48,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:17:48,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1862692647, now seen corresponding path program 1 times [2025-03-09 01:17:48,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:17:48,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1394855446] [2025-03-09 01:17:48,309 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:17:48,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:48,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:17:48,311 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 01:17:48,312 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 01:17:48,380 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-09 01:17:48,520 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-09 01:17:48,520 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:17:48,520 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:17:48,542 INFO L256 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-09 01:17:48,543 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:17:48,561 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 01:17:48,566 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 01:17:48,566 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:17:48,566 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:17:48,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394855446] [2025-03-09 01:17:48,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394855446] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:17:48,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:17:48,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-09 01:17:48,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575816300] [2025-03-09 01:17:48,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:17:48,566 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-09 01:17:48,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:17:48,567 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-09 01:17:48,567 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-09 01:17:48,644 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 132 [2025-03-09 01:17:48,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 119 transitions, 284 flow. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:48,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:17:48,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 132 [2025-03-09 01:17:48,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:17:48,829 INFO L124 PetriNetUnfolderBase]: 122/502 cut-off events. [2025-03-09 01:17:48,829 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2025-03-09 01:17:48,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 815 conditions, 502 events. 122/502 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2536 event pairs, 100 based on Foata normal form. 0/407 useless extension candidates. Maximal degree in co-relation 782. Up to 259 conditions per place. [2025-03-09 01:17:48,832 INFO L140 encePairwiseOnDemand]: 129/132 looper letters, 44 selfloop transitions, 3 changer transitions 0/118 dead transitions. [2025-03-09 01:17:48,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 118 transitions, 376 flow [2025-03-09 01:17:48,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-09 01:17:48,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-09 01:17:48,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 269 transitions. [2025-03-09 01:17:48,833 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6792929292929293 [2025-03-09 01:17:48,833 INFO L175 Difference]: Start difference. First operand has 118 places, 119 transitions, 284 flow. Second operand 3 states and 269 transitions. [2025-03-09 01:17:48,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 118 transitions, 376 flow [2025-03-09 01:17:48,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 118 transitions, 373 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-09 01:17:48,836 INFO L231 Difference]: Finished difference. Result has 118 places, 118 transitions, 285 flow [2025-03-09 01:17:48,836 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=285, PETRI_PLACES=118, PETRI_TRANSITIONS=118} [2025-03-09 01:17:48,836 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 1 predicate places. [2025-03-09 01:17:48,836 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 118 transitions, 285 flow [2025-03-09 01:17:48,836 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:48,836 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:17:48,837 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-03-09 01:17:48,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-09 01:17:49,037 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 01:17:49,037 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-09 01:17:49,038 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:17:49,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1862692646, now seen corresponding path program 1 times [2025-03-09 01:17:49,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:17:49,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [598897544] [2025-03-09 01:17:49,039 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:17:49,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:49,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:17:49,041 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 01:17:49,043 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 01:17:49,111 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-09 01:17:49,254 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-09 01:17:49,254 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:17:49,255 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:17:49,275 INFO L256 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-09 01:17:49,276 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:17:49,281 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 01:17:49,289 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 01:17:49,289 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:17:49,290 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:17:49,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598897544] [2025-03-09 01:17:49,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598897544] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:17:49,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:17:49,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-09 01:17:49,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526120185] [2025-03-09 01:17:49,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:17:49,291 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-09 01:17:49,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:17:49,292 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-09 01:17:49,292 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-09 01:17:49,400 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 132 [2025-03-09 01:17:49,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 118 transitions, 285 flow. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:49,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:17:49,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 132 [2025-03-09 01:17:49,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:17:49,588 INFO L124 PetriNetUnfolderBase]: 122/501 cut-off events. [2025-03-09 01:17:49,588 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2025-03-09 01:17:49,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 815 conditions, 501 events. 122/501 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2534 event pairs, 100 based on Foata normal form. 0/408 useless extension candidates. Maximal degree in co-relation 781. Up to 259 conditions per place. [2025-03-09 01:17:49,601 INFO L140 encePairwiseOnDemand]: 129/132 looper letters, 44 selfloop transitions, 3 changer transitions 0/117 dead transitions. [2025-03-09 01:17:49,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 117 transitions, 377 flow [2025-03-09 01:17:49,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-09 01:17:49,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-09 01:17:49,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 269 transitions. [2025-03-09 01:17:49,603 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6792929292929293 [2025-03-09 01:17:49,604 INFO L175 Difference]: Start difference. First operand has 118 places, 118 transitions, 285 flow. Second operand 3 states and 269 transitions. [2025-03-09 01:17:49,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 117 transitions, 377 flow [2025-03-09 01:17:49,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 117 transitions, 371 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-09 01:17:49,608 INFO L231 Difference]: Finished difference. Result has 117 places, 117 transitions, 283 flow [2025-03-09 01:17:49,611 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=283, PETRI_PLACES=117, PETRI_TRANSITIONS=117} [2025-03-09 01:17:49,611 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 0 predicate places. [2025-03-09 01:17:49,611 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 117 transitions, 283 flow [2025-03-09 01:17:49,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:49,612 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:17:49,612 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2025-03-09 01:17:49,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-09 01:17:49,812 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 01:17:49,812 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-09 01:17:49,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:17:49,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1908894477, now seen corresponding path program 1 times [2025-03-09 01:17:49,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:17:49,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1718772562] [2025-03-09 01:17:49,813 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:17:49,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:49,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:17:49,815 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 01:17:49,816 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 01:17:49,877 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-09 01:17:50,024 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-09 01:17:50,024 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:17:50,024 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:17:50,046 INFO L256 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-03-09 01:17:50,047 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:17:50,052 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 01:17:50,052 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:17:50,052 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:17:50,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718772562] [2025-03-09 01:17:50,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718772562] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:17:50,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:17:50,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-09 01:17:50,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924809886] [2025-03-09 01:17:50,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:17:50,052 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-09 01:17:50,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:17:50,053 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-09 01:17:50,053 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-09 01:17:50,054 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 132 [2025-03-09 01:17:50,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 117 transitions, 283 flow. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:50,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:17:50,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 132 [2025-03-09 01:17:50,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:17:50,253 INFO L124 PetriNetUnfolderBase]: 121/523 cut-off events. [2025-03-09 01:17:50,253 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2025-03-09 01:17:50,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 843 conditions, 523 events. 121/523 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2577 event pairs, 100 based on Foata normal form. 2/421 useless extension candidates. Maximal degree in co-relation 812. Up to 259 conditions per place. [2025-03-09 01:17:50,256 INFO L140 encePairwiseOnDemand]: 129/132 looper letters, 48 selfloop transitions, 3 changer transitions 0/121 dead transitions. [2025-03-09 01:17:50,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 121 transitions, 397 flow [2025-03-09 01:17:50,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-09 01:17:50,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-09 01:17:50,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 277 transitions. [2025-03-09 01:17:50,258 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6994949494949495 [2025-03-09 01:17:50,258 INFO L175 Difference]: Start difference. First operand has 117 places, 117 transitions, 283 flow. Second operand 3 states and 277 transitions. [2025-03-09 01:17:50,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 121 transitions, 397 flow [2025-03-09 01:17:50,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 121 transitions, 387 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-09 01:17:50,260 INFO L231 Difference]: Finished difference. Result has 118 places, 117 transitions, 288 flow [2025-03-09 01:17:50,260 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=288, PETRI_PLACES=118, PETRI_TRANSITIONS=117} [2025-03-09 01:17:50,263 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 1 predicate places. [2025-03-09 01:17:50,263 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 117 transitions, 288 flow [2025-03-09 01:17:50,263 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:50,264 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:17:50,264 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:17:50,277 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 01:17:50,464 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 01:17:50,464 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-09 01:17:50,465 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:17:50,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1908896406, now seen corresponding path program 1 times [2025-03-09 01:17:50,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:17:50,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [658044925] [2025-03-09 01:17:50,465 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:17:50,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:50,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:17:50,467 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 01:17:50,469 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 01:17:50,536 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-09 01:17:50,679 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-09 01:17:50,679 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:17:50,679 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:17:50,700 INFO L256 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-09 01:17:50,701 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:17:50,704 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 01:17:50,715 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 01:17:50,715 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:17:50,715 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:17:50,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658044925] [2025-03-09 01:17:50,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658044925] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:17:50,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:17:50,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-09 01:17:50,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045688798] [2025-03-09 01:17:50,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:17:50,716 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 01:17:50,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:17:50,716 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 01:17:50,716 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-09 01:17:50,862 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 132 [2025-03-09 01:17:50,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 117 transitions, 288 flow. Second operand has 4 states, 4 states have (on average 70.75) internal successors, (283), 4 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:50,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:17:50,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 132 [2025-03-09 01:17:50,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:17:51,075 INFO L124 PetriNetUnfolderBase]: 121/519 cut-off events. [2025-03-09 01:17:51,075 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2025-03-09 01:17:51,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 845 conditions, 519 events. 121/519 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2535 event pairs, 100 based on Foata normal form. 0/421 useless extension candidates. Maximal degree in co-relation 811. Up to 261 conditions per place. [2025-03-09 01:17:51,077 INFO L140 encePairwiseOnDemand]: 125/132 looper letters, 42 selfloop transitions, 7 changer transitions 0/115 dead transitions. [2025-03-09 01:17:51,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 115 transitions, 382 flow [2025-03-09 01:17:51,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-09 01:17:51,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-09 01:17:51,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 392 transitions. [2025-03-09 01:17:51,080 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.593939393939394 [2025-03-09 01:17:51,080 INFO L175 Difference]: Start difference. First operand has 118 places, 117 transitions, 288 flow. Second operand 5 states and 392 transitions. [2025-03-09 01:17:51,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 115 transitions, 382 flow [2025-03-09 01:17:51,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 115 transitions, 379 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-09 01:17:51,082 INFO L231 Difference]: Finished difference. Result has 119 places, 115 transitions, 295 flow [2025-03-09 01:17:51,083 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=295, PETRI_PLACES=119, PETRI_TRANSITIONS=115} [2025-03-09 01:17:51,083 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 2 predicate places. [2025-03-09 01:17:51,083 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 115 transitions, 295 flow [2025-03-09 01:17:51,083 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.75) internal successors, (283), 4 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:51,083 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:17:51,083 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:17:51,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-09 01:17:51,284 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 01:17:51,284 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-09 01:17:51,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:17:51,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1908896405, now seen corresponding path program 1 times [2025-03-09 01:17:51,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:17:51,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [510516286] [2025-03-09 01:17:51,285 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:17:51,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:51,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:17:51,286 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 01:17:51,288 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 01:17:51,343 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-09 01:17:51,525 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-09 01:17:51,525 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:17:51,525 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:17:51,547 INFO L256 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-09 01:17:51,549 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:17:51,554 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 01:17:51,568 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 01:17:51,568 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:17:51,568 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:17:51,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510516286] [2025-03-09 01:17:51,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510516286] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:17:51,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:17:51,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-09 01:17:51,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521197096] [2025-03-09 01:17:51,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:17:51,569 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 01:17:51,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:17:51,569 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 01:17:51,569 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-09 01:17:51,716 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 132 [2025-03-09 01:17:51,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 115 transitions, 295 flow. Second operand has 4 states, 4 states have (on average 72.5) internal successors, (290), 4 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:51,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:17:51,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 132 [2025-03-09 01:17:51,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:17:51,909 INFO L124 PetriNetUnfolderBase]: 121/515 cut-off events. [2025-03-09 01:17:51,909 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2025-03-09 01:17:51,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 849 conditions, 515 events. 121/515 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2519 event pairs, 100 based on Foata normal form. 4/421 useless extension candidates. Maximal degree in co-relation 810. Up to 263 conditions per place. [2025-03-09 01:17:51,912 INFO L140 encePairwiseOnDemand]: 127/132 looper letters, 45 selfloop transitions, 4 changer transitions 0/113 dead transitions. [2025-03-09 01:17:51,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 113 transitions, 389 flow [2025-03-09 01:17:51,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 01:17:51,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 01:17:51,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 331 transitions. [2025-03-09 01:17:51,914 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6268939393939394 [2025-03-09 01:17:51,914 INFO L175 Difference]: Start difference. First operand has 119 places, 115 transitions, 295 flow. Second operand 4 states and 331 transitions. [2025-03-09 01:17:51,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 113 transitions, 389 flow [2025-03-09 01:17:51,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 113 transitions, 375 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-09 01:17:51,916 INFO L231 Difference]: Finished difference. Result has 116 places, 113 transitions, 285 flow [2025-03-09 01:17:51,916 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=285, PETRI_PLACES=116, PETRI_TRANSITIONS=113} [2025-03-09 01:17:51,917 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, -1 predicate places. [2025-03-09 01:17:51,917 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 113 transitions, 285 flow [2025-03-09 01:17:51,917 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.5) internal successors, (290), 4 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:51,918 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:17:51,918 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:17:51,932 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-09 01:17:52,118 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 01:17:52,118 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-09 01:17:52,118 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:17:52,119 INFO L85 PathProgramCache]: Analyzing trace with hash -498387701, now seen corresponding path program 1 times [2025-03-09 01:17:52,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:17:52,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2077718434] [2025-03-09 01:17:52,119 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:17:52,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:52,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:17:52,121 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 01:17:52,121 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 01:17:52,182 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-09 01:17:52,349 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-09 01:17:52,349 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:17:52,349 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:17:52,372 INFO L256 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-09 01:17:52,373 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:17:52,415 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2025-03-09 01:17:52,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2025-03-09 01:17:52,447 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 01:17:52,447 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:17:52,447 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:17:52,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077718434] [2025-03-09 01:17:52,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077718434] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:17:52,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:17:52,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-09 01:17:52,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868235589] [2025-03-09 01:17:52,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:17:52,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 01:17:52,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:17:52,448 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 01:17:52,448 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-09 01:17:52,624 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 132 [2025-03-09 01:17:52,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 113 transitions, 285 flow. Second operand has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:52,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:17:52,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 132 [2025-03-09 01:17:52,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:17:52,833 INFO L124 PetriNetUnfolderBase]: 120/468 cut-off events. [2025-03-09 01:17:52,833 INFO L125 PetriNetUnfolderBase]: For 26/27 co-relation queries the response was YES. [2025-03-09 01:17:52,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 799 conditions, 468 events. 120/468 cut-off events. For 26/27 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2252 event pairs, 61 based on Foata normal form. 3/388 useless extension candidates. Maximal degree in co-relation 765. Up to 173 conditions per place. [2025-03-09 01:17:52,835 INFO L140 encePairwiseOnDemand]: 126/132 looper letters, 65 selfloop transitions, 5 changer transitions 0/133 dead transitions. [2025-03-09 01:17:52,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 133 transitions, 465 flow [2025-03-09 01:17:52,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 01:17:52,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 01:17:52,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 352 transitions. [2025-03-09 01:17:52,836 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2025-03-09 01:17:52,836 INFO L175 Difference]: Start difference. First operand has 116 places, 113 transitions, 285 flow. Second operand 4 states and 352 transitions. [2025-03-09 01:17:52,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 133 transitions, 465 flow [2025-03-09 01:17:52,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 133 transitions, 457 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-09 01:17:52,838 INFO L231 Difference]: Finished difference. Result has 114 places, 111 transitions, 283 flow [2025-03-09 01:17:52,838 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=283, PETRI_PLACES=114, PETRI_TRANSITIONS=111} [2025-03-09 01:17:52,840 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, -3 predicate places. [2025-03-09 01:17:52,840 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 111 transitions, 283 flow [2025-03-09 01:17:52,841 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:52,841 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:17:52,841 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:17:52,855 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 01:17:53,041 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 01:17:53,041 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-09 01:17:53,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:17:53,042 INFO L85 PathProgramCache]: Analyzing trace with hash -498387700, now seen corresponding path program 1 times [2025-03-09 01:17:53,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:17:53,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1790686111] [2025-03-09 01:17:53,042 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:17:53,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:53,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:17:53,044 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 01:17:53,045 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 01:17:53,107 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-09 01:17:53,286 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-09 01:17:53,286 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:17:53,286 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:17:53,311 INFO L256 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-09 01:17:53,312 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:17:53,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-09 01:17:53,389 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 01:17:53,431 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 01:17:53,431 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:17:53,431 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:17:53,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790686111] [2025-03-09 01:17:53,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790686111] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:17:53,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:17:53,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-09 01:17:53,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146582690] [2025-03-09 01:17:53,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:17:53,432 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-09 01:17:53,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:17:53,432 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-09 01:17:53,432 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-09 01:17:53,729 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 132 [2025-03-09 01:17:53,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 111 transitions, 283 flow. Second operand has 5 states, 5 states have (on average 72.4) internal successors, (362), 5 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:53,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:17:53,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 132 [2025-03-09 01:17:53,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:17:54,005 INFO L124 PetriNetUnfolderBase]: 123/542 cut-off events. [2025-03-09 01:17:54,005 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2025-03-09 01:17:54,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 916 conditions, 542 events. 123/542 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2770 event pairs, 101 based on Foata normal form. 2/436 useless extension candidates. Maximal degree in co-relation 825. Up to 270 conditions per place. [2025-03-09 01:17:54,007 INFO L140 encePairwiseOnDemand]: 126/132 looper letters, 52 selfloop transitions, 5 changer transitions 0/118 dead transitions. [2025-03-09 01:17:54,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 118 transitions, 427 flow [2025-03-09 01:17:54,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 01:17:54,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 01:17:54,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 340 transitions. [2025-03-09 01:17:54,008 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6439393939393939 [2025-03-09 01:17:54,008 INFO L175 Difference]: Start difference. First operand has 114 places, 111 transitions, 283 flow. Second operand 4 states and 340 transitions. [2025-03-09 01:17:54,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 118 transitions, 427 flow [2025-03-09 01:17:54,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 118 transitions, 411 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-09 01:17:54,010 INFO L231 Difference]: Finished difference. Result has 116 places, 115 transitions, 319 flow [2025-03-09 01:17:54,011 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=319, PETRI_PLACES=116, PETRI_TRANSITIONS=115} [2025-03-09 01:17:54,011 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, -1 predicate places. [2025-03-09 01:17:54,011 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 115 transitions, 319 flow [2025-03-09 01:17:54,011 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 72.4) internal successors, (362), 5 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:54,011 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:17:54,011 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:17:54,025 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 01:17:54,216 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 01:17:54,216 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-09 01:17:54,216 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:17:54,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1729851260, now seen corresponding path program 1 times [2025-03-09 01:17:54,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:17:54,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1208231218] [2025-03-09 01:17:54,217 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:17:54,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:54,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:17:54,219 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 01:17:54,219 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 01:17:54,282 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-09 01:17:54,446 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-09 01:17:54,446 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:17:54,446 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:17:54,469 INFO L256 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-03-09 01:17:54,471 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:17:54,554 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 01:17:54,594 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 23 treesize of output 11 [2025-03-09 01:17:54,636 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-03-09 01:17:54,636 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 01:17:54,662 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 01:17:54,696 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 01:17:54,711 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 01:17:54,742 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 01:17:54,742 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:17:54,742 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:17:54,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208231218] [2025-03-09 01:17:54,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208231218] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:17:54,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:17:54,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-09 01:17:54,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719261480] [2025-03-09 01:17:54,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:17:54,742 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-09 01:17:54,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:17:54,743 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-09 01:17:54,743 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2025-03-09 01:17:55,734 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 132 [2025-03-09 01:17:55,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 115 transitions, 319 flow. Second operand has 10 states, 10 states have (on average 59.0) internal successors, (590), 10 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:55,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:17:55,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 132 [2025-03-09 01:17:55,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:17:56,357 INFO L124 PetriNetUnfolderBase]: 123/541 cut-off events. [2025-03-09 01:17:56,357 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2025-03-09 01:17:56,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 925 conditions, 541 events. 123/541 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2762 event pairs, 101 based on Foata normal form. 0/448 useless extension candidates. Maximal degree in co-relation 833. Up to 279 conditions per place. [2025-03-09 01:17:56,360 INFO L140 encePairwiseOnDemand]: 120/132 looper letters, 65 selfloop transitions, 11 changer transitions 0/131 dead transitions. [2025-03-09 01:17:56,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 131 transitions, 509 flow [2025-03-09 01:17:56,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-09 01:17:56,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-09 01:17:56,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 714 transitions. [2025-03-09 01:17:56,362 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49173553719008267 [2025-03-09 01:17:56,362 INFO L175 Difference]: Start difference. First operand has 116 places, 115 transitions, 319 flow. Second operand 11 states and 714 transitions. [2025-03-09 01:17:56,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 131 transitions, 509 flow [2025-03-09 01:17:56,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 131 transitions, 507 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-09 01:17:56,365 INFO L231 Difference]: Finished difference. Result has 130 places, 120 transitions, 375 flow [2025-03-09 01:17:56,365 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=375, PETRI_PLACES=130, PETRI_TRANSITIONS=120} [2025-03-09 01:17:56,366 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 13 predicate places. [2025-03-09 01:17:56,367 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 120 transitions, 375 flow [2025-03-09 01:17:56,368 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 59.0) internal successors, (590), 10 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:56,368 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:17:56,368 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:17:56,382 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-09 01:17:56,568 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 01:17:56,568 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-09 01:17:56,569 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:17:56,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1729851261, now seen corresponding path program 1 times [2025-03-09 01:17:56,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:17:56,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1455748480] [2025-03-09 01:17:56,569 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:17:56,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:56,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:17:56,571 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 01:17:56,572 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 01:17:56,637 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-09 01:17:56,808 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-09 01:17:56,808 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:17:56,808 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:17:56,832 INFO L256 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 38 conjuncts are in the unsatisfiable core [2025-03-09 01:17:56,834 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:17:56,891 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 01:17:56,896 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 01:17:56,932 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 01:17:56,938 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 01:17:56,970 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-03-09 01:17:56,971 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 01:17:56,979 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 01:17:57,011 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 01:17:57,018 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 01:17:57,054 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 01:17:57,060 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 01:17:57,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-09 01:17:57,088 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 01:17:57,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:17:57,123 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:17:57,123 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:17:57,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455748480] [2025-03-09 01:17:57,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455748480] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:17:57,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:17:57,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-09 01:17:57,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022438838] [2025-03-09 01:17:57,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:17:57,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-09 01:17:57,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:17:57,124 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-09 01:17:57,124 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-03-09 01:17:58,102 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 132 [2025-03-09 01:17:58,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 120 transitions, 375 flow. Second operand has 10 states, 10 states have (on average 57.0) internal successors, (570), 10 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:58,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:17:58,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 132 [2025-03-09 01:17:58,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:17:58,624 INFO L124 PetriNetUnfolderBase]: 123/540 cut-off events. [2025-03-09 01:17:58,625 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2025-03-09 01:17:58,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 962 conditions, 540 events. 123/540 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2750 event pairs, 101 based on Foata normal form. 1/451 useless extension candidates. Maximal degree in co-relation 882. Up to 283 conditions per place. [2025-03-09 01:17:58,627 INFO L140 encePairwiseOnDemand]: 121/132 looper letters, 68 selfloop transitions, 10 changer transitions 0/131 dead transitions. [2025-03-09 01:17:58,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 131 transitions, 561 flow [2025-03-09 01:17:58,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-09 01:17:58,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-09 01:17:58,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 638 transitions. [2025-03-09 01:17:58,629 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2025-03-09 01:17:58,629 INFO L175 Difference]: Start difference. First operand has 130 places, 120 transitions, 375 flow. Second operand 10 states and 638 transitions. [2025-03-09 01:17:58,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 131 transitions, 561 flow [2025-03-09 01:17:58,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 131 transitions, 557 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-09 01:17:58,631 INFO L231 Difference]: Finished difference. Result has 138 places, 120 transitions, 395 flow [2025-03-09 01:17:58,631 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=395, PETRI_PLACES=138, PETRI_TRANSITIONS=120} [2025-03-09 01:17:58,632 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 21 predicate places. [2025-03-09 01:17:58,632 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 120 transitions, 395 flow [2025-03-09 01:17:58,632 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 57.0) internal successors, (570), 10 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:58,632 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:17:58,632 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:17:58,646 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 01:17:58,832 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 01:17:58,833 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-09 01:17:58,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:17:58,833 INFO L85 PathProgramCache]: Analyzing trace with hash 2085782235, now seen corresponding path program 1 times [2025-03-09 01:17:58,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:17:58,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [721355200] [2025-03-09 01:17:58,833 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:17:58,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:58,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:17:58,835 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 01:17:58,836 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 01:17:58,902 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-09 01:17:59,072 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-09 01:17:59,072 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:17:59,072 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:17:59,096 INFO L256 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-09 01:17:59,097 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:17:59,103 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 01:17:59,133 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 01:17:59,133 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:17:59,133 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:17:59,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721355200] [2025-03-09 01:17:59,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721355200] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:17:59,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:17:59,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-09 01:17:59,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021695220] [2025-03-09 01:17:59,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:17:59,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 01:17:59,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:17:59,134 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 01:17:59,134 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-09 01:17:59,262 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 132 [2025-03-09 01:17:59,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 120 transitions, 395 flow. Second operand has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:59,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:17:59,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 132 [2025-03-09 01:17:59,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:17:59,446 INFO L124 PetriNetUnfolderBase]: 122/531 cut-off events. [2025-03-09 01:17:59,447 INFO L125 PetriNetUnfolderBase]: For 67/67 co-relation queries the response was YES. [2025-03-09 01:17:59,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 936 conditions, 531 events. 122/531 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2714 event pairs, 100 based on Foata normal form. 8/446 useless extension candidates. Maximal degree in co-relation 856. Up to 260 conditions per place. [2025-03-09 01:17:59,449 INFO L140 encePairwiseOnDemand]: 127/132 looper letters, 45 selfloop transitions, 9 changer transitions 0/118 dead transitions. [2025-03-09 01:17:59,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 118 transitions, 499 flow [2025-03-09 01:17:59,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 01:17:59,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 01:17:59,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 337 transitions. [2025-03-09 01:17:59,450 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6382575757575758 [2025-03-09 01:17:59,450 INFO L175 Difference]: Start difference. First operand has 138 places, 120 transitions, 395 flow. Second operand 4 states and 337 transitions. [2025-03-09 01:17:59,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 118 transitions, 499 flow [2025-03-09 01:17:59,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 118 transitions, 479 flow, removed 0 selfloop flow, removed 9 redundant places. [2025-03-09 01:17:59,452 INFO L231 Difference]: Finished difference. Result has 130 places, 118 transitions, 389 flow [2025-03-09 01:17:59,453 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=389, PETRI_PLACES=130, PETRI_TRANSITIONS=118} [2025-03-09 01:17:59,453 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 13 predicate places. [2025-03-09 01:17:59,453 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 118 transitions, 389 flow [2025-03-09 01:17:59,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:17:59,453 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:17:59,453 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:17:59,470 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 01:17:59,655 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 01:17:59,656 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-09 01:17:59,656 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:17:59,656 INFO L85 PathProgramCache]: Analyzing trace with hash 2085782234, now seen corresponding path program 1 times [2025-03-09 01:17:59,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:17:59,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1595011093] [2025-03-09 01:17:59,657 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:17:59,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:17:59,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:17:59,658 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 01:17:59,659 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 01:17:59,727 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-09 01:17:59,859 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-09 01:17:59,860 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:17:59,860 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:17:59,881 INFO L256 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-09 01:17:59,882 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:17:59,892 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 01:17:59,893 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:17:59,893 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:17:59,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595011093] [2025-03-09 01:17:59,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595011093] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:17:59,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:17:59,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-09 01:17:59,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651833523] [2025-03-09 01:17:59,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:17:59,893 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 01:17:59,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:17:59,893 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 01:17:59,893 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-09 01:17:59,983 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 132 [2025-03-09 01:17:59,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 118 transitions, 389 flow. Second operand has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 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 01:17:59,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:17:59,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 132 [2025-03-09 01:17:59,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:18:00,168 INFO L124 PetriNetUnfolderBase]: 122/523 cut-off events. [2025-03-09 01:18:00,169 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2025-03-09 01:18:00,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 938 conditions, 523 events. 122/523 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2649 event pairs, 100 based on Foata normal form. 0/438 useless extension candidates. Maximal degree in co-relation 861. Up to 260 conditions per place. [2025-03-09 01:18:00,171 INFO L140 encePairwiseOnDemand]: 127/132 looper letters, 47 selfloop transitions, 9 changer transitions 0/116 dead transitions. [2025-03-09 01:18:00,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 116 transitions, 497 flow [2025-03-09 01:18:00,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 01:18:00,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 01:18:00,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 331 transitions. [2025-03-09 01:18:00,172 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6268939393939394 [2025-03-09 01:18:00,172 INFO L175 Difference]: Start difference. First operand has 130 places, 118 transitions, 389 flow. Second operand 4 states and 331 transitions. [2025-03-09 01:18:00,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 116 transitions, 497 flow [2025-03-09 01:18:00,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 116 transitions, 479 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-09 01:18:00,174 INFO L231 Difference]: Finished difference. Result has 128 places, 116 transitions, 385 flow [2025-03-09 01:18:00,174 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=385, PETRI_PLACES=128, PETRI_TRANSITIONS=116} [2025-03-09 01:18:00,174 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 11 predicate places. [2025-03-09 01:18:00,174 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 116 transitions, 385 flow [2025-03-09 01:18:00,175 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 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 01:18:00,175 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:18:00,175 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:18:00,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-09 01:18:00,376 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 01:18:00,376 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-09 01:18:00,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:18:00,376 INFO L85 PathProgramCache]: Analyzing trace with hash -644466278, now seen corresponding path program 1 times [2025-03-09 01:18:00,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:18:00,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [520073015] [2025-03-09 01:18:00,377 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:18:00,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:18:00,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:18:00,378 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 01:18:00,380 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 01:18:00,452 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-09 01:18:00,601 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-09 01:18:00,602 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:18:00,602 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:18:00,625 INFO L256 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-09 01:18:00,627 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:18:00,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:18:00,639 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:18:00,660 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:18:00,661 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:18:00,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520073015] [2025-03-09 01:18:00,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520073015] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:18:00,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-09 01:18:00,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2025-03-09 01:18:00,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978432740] [2025-03-09 01:18:00,661 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-09 01:18:00,661 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-09 01:18:00,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:18:00,661 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-09 01:18:00,661 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-03-09 01:18:00,661 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 132 [2025-03-09 01:18:00,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 116 transitions, 385 flow. Second operand has 6 states, 6 states have (on average 78.83333333333333) internal successors, (473), 6 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:18:00,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:18:00,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 132 [2025-03-09 01:18:00,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:18:00,952 INFO L124 PetriNetUnfolderBase]: 122/573 cut-off events. [2025-03-09 01:18:00,953 INFO L125 PetriNetUnfolderBase]: For 151/151 co-relation queries the response was YES. [2025-03-09 01:18:00,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1064 conditions, 573 events. 122/573 cut-off events. For 151/151 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2776 event pairs, 100 based on Foata normal form. 6/490 useless extension candidates. Maximal degree in co-relation 981. Up to 256 conditions per place. [2025-03-09 01:18:00,955 INFO L140 encePairwiseOnDemand]: 128/132 looper letters, 62 selfloop transitions, 11 changer transitions 0/135 dead transitions. [2025-03-09 01:18:00,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 135 transitions, 653 flow [2025-03-09 01:18:00,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-09 01:18:00,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-09 01:18:00,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 518 transitions. [2025-03-09 01:18:00,957 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6540404040404041 [2025-03-09 01:18:00,957 INFO L175 Difference]: Start difference. First operand has 128 places, 116 transitions, 385 flow. Second operand 6 states and 518 transitions. [2025-03-09 01:18:00,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 135 transitions, 653 flow [2025-03-09 01:18:00,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 135 transitions, 609 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-09 01:18:00,960 INFO L231 Difference]: Finished difference. Result has 134 places, 121 transitions, 453 flow [2025-03-09 01:18:00,960 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=453, PETRI_PLACES=134, PETRI_TRANSITIONS=121} [2025-03-09 01:18:00,960 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 17 predicate places. [2025-03-09 01:18:00,960 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 121 transitions, 453 flow [2025-03-09 01:18:00,961 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 78.83333333333333) internal successors, (473), 6 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:18:00,961 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:18:00,961 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:18:00,980 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 01:18:01,161 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 01:18:01,161 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-09 01:18:01,162 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:18:01,162 INFO L85 PathProgramCache]: Analyzing trace with hash -847825546, now seen corresponding path program 1 times [2025-03-09 01:18:01,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:18:01,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1247210671] [2025-03-09 01:18:01,162 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:18:01,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:18:01,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:18:01,164 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 01:18:01,165 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 01:18:01,251 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-09 01:18:01,443 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-09 01:18:01,443 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:18:01,443 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:18:01,470 INFO L256 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-03-09 01:18:01,477 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:18:01,481 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 01:18:01,484 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 01:18:01,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-03-09 01:18:01,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2025-03-09 01:18:01,727 INFO L349 Elim1Store]: treesize reduction 31, result has 36.7 percent of original size [2025-03-09 01:18:01,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2025-03-09 01:18:01,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2025-03-09 01:18:01,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 29 [2025-03-09 01:18:01,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2025-03-09 01:18:01,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 29 [2025-03-09 01:18:01,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2025-03-09 01:18:01,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 19 [2025-03-09 01:18:01,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-09 01:18:01,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2025-03-09 01:18:01,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:18:01,892 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:18:02,007 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd |c_~#c~0.offset| (_ bv4 32) (bvmul (_ bv12 32) |c_ULTIMATE.start_main_~i~0#1|)))) (and (forall ((v_ArrVal_580 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_579 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$#3.offset| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_579) |c_~#c~0.base|) .cse0) (_ bv8 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#3.base| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_580) |c_~#c~0.base|) .cse0)))) (forall ((v_ArrVal_579 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$#3.offset| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_579) |c_~#c~0.base|) .cse0))) (bvule (bvadd .cse1 (_ bv4 32)) (bvadd .cse1 (_ bv8 32))))))) is different from false [2025-03-09 01:18:02,057 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd |c_~#c~0.offset| (_ bv4 32) (bvmul (_ bv12 32) |c_ULTIMATE.start_main_~i~0#1|)))) (and (forall ((v_ArrVal_579 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$#3.offset| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_579) |c_~#c~0.base|) .cse1))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (forall ((v_ArrVal_580 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_579 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$#3.offset| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_579) |c_~#c~0.base|) .cse1)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#3.base| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_580) |c_~#c~0.base|) .cse1)))))) is different from false [2025-03-09 01:18:02,325 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-09 01:18:02,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 40 [2025-03-09 01:18:02,340 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-09 01:18:02,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 58 [2025-03-09 01:18:02,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 11 [2025-03-09 01:18:02,407 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-09 01:18:02,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 51 [2025-03-09 01:18:02,417 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-09 01:18:02,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 43 [2025-03-09 01:18:02,422 INFO L173 IndexEqualityManager]: detected equality via solver [2025-03-09 01:18:02,437 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-09 01:18:02,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 43 [2025-03-09 01:18:02,442 INFO L173 IndexEqualityManager]: detected equality via solver [2025-03-09 01:18:02,468 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-09 01:18:02,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 31 [2025-03-09 01:18:03,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2025-03-09 01:18:03,485 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:18:03,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247210671] [2025-03-09 01:18:03,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247210671] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:18:03,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-09 01:18:03,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2025-03-09 01:18:03,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355116722] [2025-03-09 01:18:03,485 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-09 01:18:03,485 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-09 01:18:03,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:18:03,485 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-09 01:18:03,485 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=201, Unknown=5, NotChecked=58, Total=306 [2025-03-09 01:18:04,153 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 132 [2025-03-09 01:18:04,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 121 transitions, 453 flow. Second operand has 18 states, 18 states have (on average 20.88888888888889) internal successors, (376), 18 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:18:04,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:18:04,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 132 [2025-03-09 01:18:04,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:18:06,452 INFO L124 PetriNetUnfolderBase]: 465/1268 cut-off events. [2025-03-09 01:18:06,452 INFO L125 PetriNetUnfolderBase]: For 120/120 co-relation queries the response was YES. [2025-03-09 01:18:06,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2528 conditions, 1268 events. 465/1268 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7463 event pairs, 422 based on Foata normal form. 6/842 useless extension candidates. Maximal degree in co-relation 2448. Up to 955 conditions per place. [2025-03-09 01:18:06,458 INFO L140 encePairwiseOnDemand]: 122/132 looper letters, 87 selfloop transitions, 26 changer transitions 0/132 dead transitions. [2025-03-09 01:18:06,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 132 transitions, 719 flow [2025-03-09 01:18:06,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-09 01:18:06,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-09 01:18:06,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 344 transitions. [2025-03-09 01:18:06,460 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.20046620046620048 [2025-03-09 01:18:06,460 INFO L175 Difference]: Start difference. First operand has 134 places, 121 transitions, 453 flow. Second operand 13 states and 344 transitions. [2025-03-09 01:18:06,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 132 transitions, 719 flow [2025-03-09 01:18:06,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 132 transitions, 703 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-03-09 01:18:06,463 INFO L231 Difference]: Finished difference. Result has 149 places, 128 transitions, 536 flow [2025-03-09 01:18:06,464 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=536, PETRI_PLACES=149, PETRI_TRANSITIONS=128} [2025-03-09 01:18:06,465 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 32 predicate places. [2025-03-09 01:18:06,465 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 128 transitions, 536 flow [2025-03-09 01:18:06,465 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 20.88888888888889) internal successors, (376), 18 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:18:06,465 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:18:06,465 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:18:06,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-09 01:18:06,666 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:18:06,666 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-09 01:18:06,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:18:06,667 INFO L85 PathProgramCache]: Analyzing trace with hash -847825547, now seen corresponding path program 1 times [2025-03-09 01:18:06,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:18:06,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [629496501] [2025-03-09 01:18:06,667 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:18:06,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:18:06,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:18:06,669 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:18:06,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-09 01:18:06,757 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-09 01:18:06,970 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-09 01:18:06,970 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:18:06,970 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:18:07,001 INFO L256 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-09 01:18:07,003 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:18:07,007 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 01:18:07,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2025-03-09 01:18:07,163 INFO L349 Elim1Store]: treesize reduction 94, result has 30.4 percent of original size [2025-03-09 01:18:07,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 54 [2025-03-09 01:18:07,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 31 [2025-03-09 01:18:07,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 31 [2025-03-09 01:18:07,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 21 [2025-03-09 01:18:07,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-03-09 01:18:07,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:18:07,305 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:18:07,339 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_682 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| (select (select (store |c_#memory_$Pointer$#3.base| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_682) |c_~#c~0.base|) (bvadd |c_~#c~0.offset| (_ bv4 32) (bvmul (_ bv12 32) |c_ULTIMATE.start_main_~i~0#1|))))))) is different from false [2025-03-09 01:18:07,448 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-09 01:18:07,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2025-03-09 01:18:07,457 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-09 01:18:07,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 57 [2025-03-09 01:18:07,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 14 [2025-03-09 01:18:16,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2025-03-09 01:18:16,465 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:18:16,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629496501] [2025-03-09 01:18:16,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629496501] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:18:16,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-09 01:18:16,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2025-03-09 01:18:16,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739063667] [2025-03-09 01:18:16,465 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-09 01:18:16,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-09 01:18:16,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:18:16,466 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-09 01:18:16,467 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=215, Unknown=13, NotChecked=30, Total=306 [2025-03-09 01:18:16,914 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 132 [2025-03-09 01:18:16,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 128 transitions, 536 flow. Second operand has 18 states, 18 states have (on average 30.88888888888889) internal successors, (556), 18 states have internal predecessors, (556), 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 01:18:16,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:18:16,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 132 [2025-03-09 01:18:16,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:18:18,310 INFO L124 PetriNetUnfolderBase]: 329/1024 cut-off events. [2025-03-09 01:18:18,311 INFO L125 PetriNetUnfolderBase]: For 163/163 co-relation queries the response was YES. [2025-03-09 01:18:18,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2075 conditions, 1024 events. 329/1024 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5906 event pairs, 292 based on Foata normal form. 6/801 useless extension candidates. Maximal degree in co-relation 1982. Up to 679 conditions per place. [2025-03-09 01:18:18,314 INFO L140 encePairwiseOnDemand]: 124/132 looper letters, 78 selfloop transitions, 24 changer transitions 0/131 dead transitions. [2025-03-09 01:18:18,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 131 transitions, 750 flow [2025-03-09 01:18:18,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-09 01:18:18,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-09 01:18:18,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 405 transitions. [2025-03-09 01:18:18,316 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.27892561983471076 [2025-03-09 01:18:18,316 INFO L175 Difference]: Start difference. First operand has 149 places, 128 transitions, 536 flow. Second operand 11 states and 405 transitions. [2025-03-09 01:18:18,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 131 transitions, 750 flow [2025-03-09 01:18:18,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 131 transitions, 720 flow, removed 10 selfloop flow, removed 3 redundant places. [2025-03-09 01:18:18,319 INFO L231 Difference]: Finished difference. Result has 157 places, 128 transitions, 563 flow [2025-03-09 01:18:18,319 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=563, PETRI_PLACES=157, PETRI_TRANSITIONS=128} [2025-03-09 01:18:18,319 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 40 predicate places. [2025-03-09 01:18:18,319 INFO L471 AbstractCegarLoop]: Abstraction has has 157 places, 128 transitions, 563 flow [2025-03-09 01:18:18,320 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 30.88888888888889) internal successors, (556), 18 states have internal predecessors, (556), 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 01:18:18,320 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:18:18,320 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:18:18,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-09 01:18:18,523 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:18:18,524 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-09 01:18:18,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:18:18,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1370748179, now seen corresponding path program 1 times [2025-03-09 01:18:18,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:18:18,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [471055828] [2025-03-09 01:18:18,525 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:18:18,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:18:18,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:18:18,527 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:18:18,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-09 01:18:18,641 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-03-09 01:18:18,896 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-03-09 01:18:18,896 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:18:18,896 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:18:18,927 INFO L256 TraceCheckSpWp]: Trace formula consists of 899 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-09 01:18:18,929 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:18:18,966 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2025-03-09 01:18:18,967 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:18:19,015 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2025-03-09 01:18:19,016 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:18:19,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471055828] [2025-03-09 01:18:19,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471055828] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:18:19,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-09 01:18:19,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2025-03-09 01:18:19,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196746082] [2025-03-09 01:18:19,016 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-09 01:18:19,016 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-09 01:18:19,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:18:19,016 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-09 01:18:19,016 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-03-09 01:18:19,017 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 132 [2025-03-09 01:18:19,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 128 transitions, 563 flow. Second operand has 6 states, 6 states have (on average 79.33333333333333) internal successors, (476), 6 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:18:19,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:18:19,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 132 [2025-03-09 01:18:19,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:18:19,329 INFO L124 PetriNetUnfolderBase]: 124/668 cut-off events. [2025-03-09 01:18:19,329 INFO L125 PetriNetUnfolderBase]: For 411/411 co-relation queries the response was YES. [2025-03-09 01:18:19,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1542 conditions, 668 events. 124/668 cut-off events. For 411/411 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2421 event pairs, 100 based on Foata normal form. 0/586 useless extension candidates. Maximal degree in co-relation 1447. Up to 250 conditions per place. [2025-03-09 01:18:19,332 INFO L140 encePairwiseOnDemand]: 128/132 looper letters, 94 selfloop transitions, 6 changer transitions 0/165 dead transitions. [2025-03-09 01:18:19,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 165 transitions, 1105 flow [2025-03-09 01:18:19,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-09 01:18:19,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-09 01:18:19,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 527 transitions. [2025-03-09 01:18:19,333 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6654040404040404 [2025-03-09 01:18:19,333 INFO L175 Difference]: Start difference. First operand has 157 places, 128 transitions, 563 flow. Second operand 6 states and 527 transitions. [2025-03-09 01:18:19,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 165 transitions, 1105 flow [2025-03-09 01:18:19,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 165 transitions, 997 flow, removed 0 selfloop flow, removed 10 redundant places. [2025-03-09 01:18:19,337 INFO L231 Difference]: Finished difference. Result has 156 places, 131 transitions, 574 flow [2025-03-09 01:18:19,337 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=515, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=574, PETRI_PLACES=156, PETRI_TRANSITIONS=131} [2025-03-09 01:18:19,338 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 39 predicate places. [2025-03-09 01:18:19,338 INFO L471 AbstractCegarLoop]: Abstraction has has 156 places, 131 transitions, 574 flow [2025-03-09 01:18:19,338 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 79.33333333333333) internal successors, (476), 6 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:18:19,338 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:18:19,338 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1] [2025-03-09 01:18:19,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-09 01:18:19,539 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:18:19,539 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-09 01:18:19,539 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:18:19,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1370748083, now seen corresponding path program 2 times [2025-03-09 01:18:19,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:18:19,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [750657791] [2025-03-09 01:18:19,540 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:18:19,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:18:19,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:18:19,542 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:18:19,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-09 01:18:19,669 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-03-09 01:18:19,953 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-03-09 01:18:19,953 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 01:18:19,953 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:18:19,986 INFO L256 TraceCheckSpWp]: Trace formula consists of 900 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-09 01:18:19,988 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:18:20,037 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:18:20,037 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:18:20,114 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:18:20,114 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:18:20,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750657791] [2025-03-09 01:18:20,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750657791] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:18:20,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-09 01:18:20,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2025-03-09 01:18:20,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965645794] [2025-03-09 01:18:20,114 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-09 01:18:20,114 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-09 01:18:20,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:18:20,115 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-09 01:18:20,115 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2025-03-09 01:18:20,115 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 132 [2025-03-09 01:18:20,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 131 transitions, 574 flow. Second operand has 12 states, 12 states have (on average 79.91666666666667) internal successors, (959), 12 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:18:20,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:18:20,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 132 [2025-03-09 01:18:20,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:18:20,895 INFO L124 PetriNetUnfolderBase]: 124/920 cut-off events. [2025-03-09 01:18:20,895 INFO L125 PetriNetUnfolderBase]: For 860/860 co-relation queries the response was YES. [2025-03-09 01:18:20,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2326 conditions, 920 events. 124/920 cut-off events. For 860/860 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2485 event pairs, 100 based on Foata normal form. 24/863 useless extension candidates. Maximal degree in co-relation 2231. Up to 263 conditions per place. [2025-03-09 01:18:20,897 INFO L140 encePairwiseOnDemand]: 128/132 looper letters, 95 selfloop transitions, 23 changer transitions 0/183 dead transitions. [2025-03-09 01:18:20,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 183 transitions, 1222 flow [2025-03-09 01:18:20,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-09 01:18:20,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-09 01:18:20,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1007 transitions. [2025-03-09 01:18:20,899 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6357323232323232 [2025-03-09 01:18:20,899 INFO L175 Difference]: Start difference. First operand has 156 places, 131 transitions, 574 flow. Second operand 12 states and 1007 transitions. [2025-03-09 01:18:20,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 183 transitions, 1222 flow [2025-03-09 01:18:20,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 183 transitions, 1220 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-09 01:18:20,904 INFO L231 Difference]: Finished difference. Result has 173 places, 144 transitions, 851 flow [2025-03-09 01:18:20,904 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=851, PETRI_PLACES=173, PETRI_TRANSITIONS=144} [2025-03-09 01:18:20,904 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 56 predicate places. [2025-03-09 01:18:20,904 INFO L471 AbstractCegarLoop]: Abstraction has has 173 places, 144 transitions, 851 flow [2025-03-09 01:18:20,905 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 79.91666666666667) internal successors, (959), 12 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:18:20,905 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:18:20,905 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1] [2025-03-09 01:18:20,925 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-09 01:18:21,105 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:18:21,105 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-09 01:18:21,106 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:18:21,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1474109357, now seen corresponding path program 3 times [2025-03-09 01:18:21,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:18:21,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2067397572] [2025-03-09 01:18:21,107 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 01:18:21,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:18:21,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:18:21,110 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:18:21,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-09 01:18:21,285 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 97 statements into 12 equivalence classes.