./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing-deref.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 798a7b37 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing-deref.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 dda5467f7679a243042daf02aae11f74f39b907c2525dfc042cb8ad8b69dcfc9 --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-04 10:04:36,889 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-04 10:04:36,939 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-04 10:04:36,945 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-04 10:04:36,945 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-04 10:04:36,969 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-04 10:04:36,970 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-04 10:04:36,970 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-04 10:04:36,970 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-04 10:04:36,970 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-04 10:04:36,971 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-04 10:04:36,971 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-04 10:04:36,971 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-04 10:04:36,972 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-04 10:04:36,972 INFO L153 SettingsManager]: * Use SBE=true [2025-03-04 10:04:36,972 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-04 10:04:36,972 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-04 10:04:36,972 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-04 10:04:36,972 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-04 10:04:36,973 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-04 10:04:36,973 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-04 10:04:36,973 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-04 10:04:36,973 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-04 10:04:36,973 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-04 10:04:36,973 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-04 10:04:36,973 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-04 10:04:36,973 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-04 10:04:36,973 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-04 10:04:36,973 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-04 10:04:36,973 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-04 10:04:36,974 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-04 10:04:36,974 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-04 10:04:36,974 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-04 10:04:36,974 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 10:04:36,974 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-04 10:04:36,974 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-04 10:04:36,974 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-04 10:04:36,974 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-04 10:04:36,974 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-04 10:04:36,974 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-04 10:04:36,975 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-04 10:04:36,975 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-04 10:04:36,975 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 -> dda5467f7679a243042daf02aae11f74f39b907c2525dfc042cb8ad8b69dcfc9 [2025-03-04 10:04:37,212 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-04 10:04:37,218 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-04 10:04:37,220 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-04 10:04:37,220 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-04 10:04:37,221 INFO L274 PluginConnector]: CDTParser initialized [2025-03-04 10:04:37,221 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing-deref.i [2025-03-04 10:04:38,453 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c6b5d40c/1f0e109ae7be4344ad11911e8045dd0a/FLAG2695a80c3 [2025-03-04 10:04:38,768 INFO L384 CDTParser]: Found 1 translation units. [2025-03-04 10:04:38,769 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing-deref.i [2025-03-04 10:04:38,786 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c6b5d40c/1f0e109ae7be4344ad11911e8045dd0a/FLAG2695a80c3 [2025-03-04 10:04:38,799 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c6b5d40c/1f0e109ae7be4344ad11911e8045dd0a [2025-03-04 10:04:38,802 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-04 10:04:38,803 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-04 10:04:38,804 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-04 10:04:38,804 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-04 10:04:38,807 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-04 10:04:38,808 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 10:04:38" (1/1) ... [2025-03-04 10:04:38,810 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76efd624 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:38, skipping insertion in model container [2025-03-04 10:04:38,810 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 10:04:38" (1/1) ... [2025-03-04 10:04:38,845 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-04 10:04:39,123 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:39,124 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:39,124 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:39,124 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:39,158 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 10:04:39,196 ERROR L321 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2025-03-04 10:04:39,197 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6ac4591 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:39, skipping insertion in model container [2025-03-04 10:04:39,197 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-04 10:04:39,197 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2025-03-04 10:04:39,199 INFO L158 Benchmark]: Toolchain (without parser) took 395.41ms. Allocated memory is still 167.8MB. Free memory was 128.1MB in the beginning and 111.2MB in the end (delta: 16.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-03-04 10:04:39,199 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 201.3MB. Free memory is still 120.7MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-04 10:04:39,199 INFO L158 Benchmark]: CACSL2BoogieTranslator took 393.11ms. Allocated memory is still 167.8MB. Free memory was 128.1MB in the beginning and 111.2MB in the end (delta: 16.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-03-04 10:04:39,200 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 201.3MB. Free memory is still 120.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 393.11ms. Allocated memory is still 167.8MB. Free memory was 128.1MB in the beginning and 111.2MB 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-deref.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 dda5467f7679a243042daf02aae11f74f39b907c2525dfc042cb8ad8b69dcfc9 --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-04 10:04:40,809 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-04 10:04:40,889 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2025-03-04 10:04:40,895 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-04 10:04:40,898 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-04 10:04:40,915 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-04 10:04:40,916 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-04 10:04:40,917 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-04 10:04:40,917 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-04 10:04:40,917 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-04 10:04:40,917 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-04 10:04:40,918 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-04 10:04:40,918 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-04 10:04:40,918 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-04 10:04:40,918 INFO L153 SettingsManager]: * Use SBE=true [2025-03-04 10:04:40,919 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-04 10:04:40,919 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-04 10:04:40,919 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-04 10:04:40,919 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-04 10:04:40,919 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-04 10:04:40,919 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-04 10:04:40,919 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-04 10:04:40,919 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-04 10:04:40,919 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-04 10:04:40,919 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-04 10:04:40,919 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2025-03-04 10:04:40,919 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2025-03-04 10:04:40,919 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-04 10:04:40,919 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-04 10:04:40,919 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-04 10:04:40,919 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-04 10:04:40,919 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-04 10:04:40,919 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-04 10:04:40,920 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-04 10:04:40,920 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-04 10:04:40,920 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 10:04:40,920 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-04 10:04:40,921 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-04 10:04:40,921 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2025-03-04 10:04:40,921 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2025-03-04 10:04:40,921 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-04 10:04:40,921 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-04 10:04:40,921 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-04 10:04:40,921 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-04 10:04:40,921 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 -> dda5467f7679a243042daf02aae11f74f39b907c2525dfc042cb8ad8b69dcfc9 [2025-03-04 10:04:41,139 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-04 10:04:41,147 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-04 10:04:41,149 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-04 10:04:41,150 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-04 10:04:41,150 INFO L274 PluginConnector]: CDTParser initialized [2025-03-04 10:04:41,153 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing-deref.i [2025-03-04 10:04:42,334 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51911f929/b68a7a91e20c42e0b8343b982f664ecd/FLAGfcea5bec9 [2025-03-04 10:04:42,589 INFO L384 CDTParser]: Found 1 translation units. [2025-03-04 10:04:42,590 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing-deref.i [2025-03-04 10:04:42,607 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51911f929/b68a7a91e20c42e0b8343b982f664ecd/FLAGfcea5bec9 [2025-03-04 10:04:42,623 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51911f929/b68a7a91e20c42e0b8343b982f664ecd [2025-03-04 10:04:42,627 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-04 10:04:42,628 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-04 10:04:42,629 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-04 10:04:42,629 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-04 10:04:42,633 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-04 10:04:42,633 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 10:04:42" (1/1) ... [2025-03-04 10:04:42,635 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f5663c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:42, skipping insertion in model container [2025-03-04 10:04:42,636 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 10:04:42" (1/1) ... [2025-03-04 10:04:42,667 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-04 10:04:42,945 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:42,945 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:42,945 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:42,946 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:42,975 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 10:04:43,019 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2025-03-04 10:04:43,029 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-04 10:04:43,059 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:43,060 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:43,060 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:43,060 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:43,068 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 10:04:43,082 INFO L200 MainTranslator]: Completed pre-run [2025-03-04 10:04:43,118 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:43,118 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:43,118 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:43,118 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-04 10:04:43,127 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 10:04:43,179 INFO L204 MainTranslator]: Completed translation [2025-03-04 10:04:43,180 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:43 WrapperNode [2025-03-04 10:04:43,180 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-04 10:04:43,182 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-04 10:04:43,182 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-04 10:04:43,182 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-04 10:04:43,186 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:43" (1/1) ... [2025-03-04 10:04:43,204 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:43" (1/1) ... [2025-03-04 10:04:43,229 INFO L138 Inliner]: procedures = 284, calls = 126, calls flagged for inlining = 12, calls inlined = 13, statements flattened = 280 [2025-03-04 10:04:43,229 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-04 10:04:43,234 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-04 10:04:43,234 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-04 10:04:43,234 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-04 10:04:43,241 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:43" (1/1) ... [2025-03-04 10:04:43,241 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:43" (1/1) ... [2025-03-04 10:04:43,246 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:43" (1/1) ... [2025-03-04 10:04:43,269 INFO L175 MemorySlicer]: Split 100 memory accesses to 4 slices as follows [2, 2, 5, 91]. 91 percent of accesses are in the largest equivalence class. The 77 initializations are split as follows [2, 0, 5, 70]. The 13 writes are split as follows [0, 1, 0, 12]. [2025-03-04 10:04:43,271 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:43" (1/1) ... [2025-03-04 10:04:43,271 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:43" (1/1) ... [2025-03-04 10:04:43,295 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:43" (1/1) ... [2025-03-04 10:04:43,296 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:43" (1/1) ... [2025-03-04 10:04:43,299 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:43" (1/1) ... [2025-03-04 10:04:43,300 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:43" (1/1) ... [2025-03-04 10:04:43,303 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-04 10:04:43,304 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-04 10:04:43,304 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-04 10:04:43,304 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-04 10:04:43,305 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:43" (1/1) ... [2025-03-04 10:04:43,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 10:04:43,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:04:43,331 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-04 10:04:43,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-04 10:04:43,367 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2025-03-04 10:04:43,367 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2025-03-04 10:04:43,367 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2025-03-04 10:04:43,367 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2025-03-04 10:04:43,367 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-04 10:04:43,367 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-03-04 10:04:43,367 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2025-03-04 10:04:43,367 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2025-03-04 10:04:43,367 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2025-03-04 10:04:43,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-04 10:04:43,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2025-03-04 10:04:43,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2025-03-04 10:04:43,368 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2025-03-04 10:04:43,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2025-03-04 10:04:43,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2025-03-04 10:04:43,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2025-03-04 10:04:43,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2025-03-04 10:04:43,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2025-03-04 10:04:43,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2025-03-04 10:04:43,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2025-03-04 10:04:43,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2025-03-04 10:04:43,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2025-03-04 10:04:43,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#0 [2025-03-04 10:04:43,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#1 [2025-03-04 10:04:43,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#2 [2025-03-04 10:04:43,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#3 [2025-03-04 10:04:43,369 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-03-04 10:04:43,369 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-03-04 10:04:43,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-04 10:04:43,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-04 10:04:43,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-03-04 10:04:43,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2025-03-04 10:04:43,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2025-03-04 10:04:43,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2025-03-04 10:04:43,369 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2025-03-04 10:04:43,369 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2025-03-04 10:04:43,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-04 10:04:43,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-04 10:04:43,371 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-04 10:04:43,507 INFO L256 CfgBuilder]: Building ICFG [2025-03-04 10:04:43,508 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-04 10:04:44,035 INFO L1325 $ProcedureCfgBuilder]: dead code at ProgramPoint L1072: havoc main_~#t_ids~0#1.base, main_~#t_ids~0#1.offset; [2025-03-04 10:04:44,036 INFO L1325 $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 [2025-03-04 10:04:44,179 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-04 10:04:44,179 INFO L307 CfgBuilder]: Performing block encoding [2025-03-04 10:04:45,606 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-04 10:04:45,607 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-04 10:04:45,608 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 10:04:45 BoogieIcfgContainer [2025-03-04 10:04:45,608 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-04 10:04:45,610 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-04 10:04:45,610 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-04 10:04:45,614 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-04 10:04:45,614 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.03 10:04:42" (1/3) ... [2025-03-04 10:04:45,615 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@208df416 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 10:04:45, skipping insertion in model container [2025-03-04 10:04:45,615 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:04:43" (2/3) ... [2025-03-04 10:04:45,616 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@208df416 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 10:04:45, skipping insertion in model container [2025-03-04 10:04:45,616 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 10:04:45" (3/3) ... [2025-03-04 10:04:45,618 INFO L128 eAbstractionObserver]: Analyzing ICFG 28-race_reach_92-evilcollapse_racing-deref.i [2025-03-04 10:04:45,630 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-04 10:04:45,632 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 28-race_reach_92-evilcollapse_racing-deref.i that has 2 procedures, 114 locations, 1 initial locations, 10 loop locations, and 48 error locations. [2025-03-04 10:04:45,632 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-04 10:04:45,704 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2025-03-04 10:04:45,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 132 transitions, 271 flow [2025-03-04 10:04:45,784 INFO L124 PetriNetUnfolderBase]: 18/144 cut-off events. [2025-03-04 10:04:45,785 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-03-04 10:04:45,790 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. [2025-03-04 10:04:45,791 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 132 transitions, 271 flow [2025-03-04 10:04:45,794 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 132 transitions, 271 flow [2025-03-04 10:04:45,800 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-04 10:04:45,807 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;@418b34e4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-04 10:04:45,807 INFO L334 AbstractCegarLoop]: Starting to check reachability of 64 error locations. [2025-03-04 10:04:45,815 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-04 10:04:45,815 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2025-03-04 10:04:45,815 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-04 10:04:45,815 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:04:45,816 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-04 10:04:45,816 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)] === [2025-03-04 10:04:45,820 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:04:45,821 INFO L85 PathProgramCache]: Analyzing trace with hash 782609, now seen corresponding path program 1 times [2025-03-04 10:04:45,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:04:45,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2000639967] [2025-03-04 10:04:45,829 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:04:45,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:45,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:04:45,832 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:04:45,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-04 10:04:45,919 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-04 10:04:46,033 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-04 10:04:46,033 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:04:46,033 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:04:46,050 INFO L256 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-04 10:04:46,053 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:04:46,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:04:46,095 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:04:46,096 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:04:46,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000639967] [2025-03-04 10:04:46,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000639967] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:04:46,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:04:46,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-04 10:04:46,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758801507] [2025-03-04 10:04:46,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:04:46,103 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 10:04:46,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:04:46,121 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 10:04:46,122 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 10:04:46,306 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 132 [2025-03-04 10:04:46,309 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) [2025-03-04 10:04:46,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:04:46,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 132 [2025-03-04 10:04:46,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:04:46,656 INFO L124 PetriNetUnfolderBase]: 120/455 cut-off events. [2025-03-04 10:04:46,657 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-04 10:04:46,658 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. [2025-03-04 10:04:46,661 INFO L140 encePairwiseOnDemand]: 111/132 looper letters, 64 selfloop transitions, 4 changer transitions 0/137 dead transitions. [2025-03-04 10:04:46,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 137 transitions, 417 flow [2025-03-04 10:04:46,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 10:04:46,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 10:04:46,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 373 transitions. [2025-03-04 10:04:46,675 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7064393939393939 [2025-03-04 10:04:46,677 INFO L175 Difference]: Start difference. First operand has 117 places, 132 transitions, 271 flow. Second operand 4 states and 373 transitions. [2025-03-04 10:04:46,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 137 transitions, 417 flow [2025-03-04 10:04:46,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 137 transitions, 417 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-04 10:04:46,685 INFO L231 Difference]: Finished difference. Result has 116 places, 115 transitions, 251 flow [2025-03-04 10:04:46,686 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} [2025-03-04 10:04:46,689 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, -1 predicate places. [2025-03-04 10:04:46,690 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 115 transitions, 251 flow [2025-03-04 10:04:46,690 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) [2025-03-04 10:04:46,691 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:04:46,691 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-04 10:04:46,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-04 10:04:46,895 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:46,895 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)] === [2025-03-04 10:04:46,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:04:46,896 INFO L85 PathProgramCache]: Analyzing trace with hash 782610, now seen corresponding path program 1 times [2025-03-04 10:04:46,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:04:46,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1027623862] [2025-03-04 10:04:46,896 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:04:46,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:46,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:04:46,899 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:04:46,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-04 10:04:46,976 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-04 10:04:47,110 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-04 10:04:47,110 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:04:47,110 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:04:47,125 INFO L256 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-04 10:04:47,126 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:04:47,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:04:47,200 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:04:47,201 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:04:47,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027623862] [2025-03-04 10:04:47,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027623862] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:04:47,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:04:47,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-04 10:04:47,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279911856] [2025-03-04 10:04:47,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:04:47,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 10:04:47,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:04:47,203 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 10:04:47,203 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 10:04:47,415 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 132 [2025-03-04 10:04:47,416 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) [2025-03-04 10:04:47,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:04:47,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 132 [2025-03-04 10:04:47,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:04:47,679 INFO L124 PetriNetUnfolderBase]: 122/503 cut-off events. [2025-03-04 10:04:47,679 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2025-03-04 10:04:47,680 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. [2025-03-04 10:04:47,682 INFO L140 encePairwiseOnDemand]: 124/132 looper letters, 46 selfloop transitions, 5 changer transitions 0/119 dead transitions. [2025-03-04 10:04:47,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 119 transitions, 367 flow [2025-03-04 10:04:47,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 10:04:47,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 10:04:47,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 342 transitions. [2025-03-04 10:04:47,684 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6477272727272727 [2025-03-04 10:04:47,684 INFO L175 Difference]: Start difference. First operand has 116 places, 115 transitions, 251 flow. Second operand 4 states and 342 transitions. [2025-03-04 10:04:47,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 119 transitions, 367 flow [2025-03-04 10:04:47,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 119 transitions, 355 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-04 10:04:47,687 INFO L231 Difference]: Finished difference. Result has 118 places, 119 transitions, 284 flow [2025-03-04 10:04:47,687 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} [2025-03-04 10:04:47,687 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 1 predicate places. [2025-03-04 10:04:47,688 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 119 transitions, 284 flow [2025-03-04 10:04:47,688 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) [2025-03-04 10:04:47,688 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:04:47,688 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-03-04 10:04:47,699 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-04 10:04:47,892 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:47,892 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)] === [2025-03-04 10:04:47,893 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:04:47,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1840605529, now seen corresponding path program 1 times [2025-03-04 10:04:47,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:04:47,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [744449121] [2025-03-04 10:04:47,893 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:04:47,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:47,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:04:47,895 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:04:47,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-04 10:04:47,961 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-04 10:04:48,072 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-04 10:04:48,072 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:04:48,072 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:04:48,089 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-04 10:04:48,090 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:04:48,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2025-03-04 10:04:48,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:04:48,112 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:04:48,112 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:04:48,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744449121] [2025-03-04 10:04:48,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744449121] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:04:48,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:04:48,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-04 10:04:48,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911629120] [2025-03-04 10:04:48,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:04:48,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-04 10:04:48,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:04:48,113 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-04 10:04:48,114 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 10:04:48,191 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 132 [2025-03-04 10:04:48,191 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) [2025-03-04 10:04:48,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:04:48,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 132 [2025-03-04 10:04:48,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:04:48,366 INFO L124 PetriNetUnfolderBase]: 122/502 cut-off events. [2025-03-04 10:04:48,367 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2025-03-04 10:04:48,369 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. [2025-03-04 10:04:48,372 INFO L140 encePairwiseOnDemand]: 129/132 looper letters, 44 selfloop transitions, 3 changer transitions 0/118 dead transitions. [2025-03-04 10:04:48,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 118 transitions, 376 flow [2025-03-04 10:04:48,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-04 10:04:48,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-04 10:04:48,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 269 transitions. [2025-03-04 10:04:48,374 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6792929292929293 [2025-03-04 10:04:48,374 INFO L175 Difference]: Start difference. First operand has 118 places, 119 transitions, 284 flow. Second operand 3 states and 269 transitions. [2025-03-04 10:04:48,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 118 transitions, 376 flow [2025-03-04 10:04:48,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 118 transitions, 373 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-04 10:04:48,376 INFO L231 Difference]: Finished difference. Result has 118 places, 118 transitions, 285 flow [2025-03-04 10:04:48,376 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} [2025-03-04 10:04:48,378 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 1 predicate places. [2025-03-04 10:04:48,378 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 118 transitions, 285 flow [2025-03-04 10:04:48,380 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) [2025-03-04 10:04:48,380 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:04:48,380 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-03-04 10:04:48,392 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-04 10:04:48,582 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:48,583 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)] === [2025-03-04 10:04:48,583 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:04:48,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1840605530, now seen corresponding path program 1 times [2025-03-04 10:04:48,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:04:48,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2019415805] [2025-03-04 10:04:48,584 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:04:48,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:48,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:04:48,586 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:04:48,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-04 10:04:48,655 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-04 10:04:48,771 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-04 10:04:48,771 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:04:48,771 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:04:48,787 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-04 10:04:48,788 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:04:48,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-04 10:04:48,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:04:48,803 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:04:48,803 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:04:48,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019415805] [2025-03-04 10:04:48,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019415805] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:04:48,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:04:48,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-04 10:04:48,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429504368] [2025-03-04 10:04:48,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:04:48,804 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-04 10:04:48,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:04:48,804 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-04 10:04:48,804 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 10:04:48,917 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 132 [2025-03-04 10:04:48,918 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) [2025-03-04 10:04:48,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:04:48,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 132 [2025-03-04 10:04:48,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:04:49,088 INFO L124 PetriNetUnfolderBase]: 122/501 cut-off events. [2025-03-04 10:04:49,088 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2025-03-04 10:04:49,089 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. [2025-03-04 10:04:49,095 INFO L140 encePairwiseOnDemand]: 129/132 looper letters, 44 selfloop transitions, 3 changer transitions 0/117 dead transitions. [2025-03-04 10:04:49,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 117 transitions, 377 flow [2025-03-04 10:04:49,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-04 10:04:49,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-04 10:04:49,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 269 transitions. [2025-03-04 10:04:49,096 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6792929292929293 [2025-03-04 10:04:49,096 INFO L175 Difference]: Start difference. First operand has 118 places, 118 transitions, 285 flow. Second operand 3 states and 269 transitions. [2025-03-04 10:04:49,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 117 transitions, 377 flow [2025-03-04 10:04:49,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 117 transitions, 371 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-04 10:04:49,098 INFO L231 Difference]: Finished difference. Result has 117 places, 117 transitions, 283 flow [2025-03-04 10:04:49,098 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} [2025-03-04 10:04:49,099 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 0 predicate places. [2025-03-04 10:04:49,099 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 117 transitions, 283 flow [2025-03-04 10:04:49,099 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) [2025-03-04 10:04:49,099 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:04:49,099 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2025-03-04 10:04:49,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-04 10:04:49,303 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:49,303 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)] === [2025-03-04 10:04:49,304 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:04:49,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1224199263, now seen corresponding path program 1 times [2025-03-04 10:04:49,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:04:49,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [460659233] [2025-03-04 10:04:49,304 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:04:49,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:49,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:04:49,307 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:04:49,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-04 10:04:49,364 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-04 10:04:49,474 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-04 10:04:49,474 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:04:49,474 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:04:49,490 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-03-04 10:04:49,491 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:04:49,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:04:49,497 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:04:49,497 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:04:49,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460659233] [2025-03-04 10:04:49,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460659233] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:04:49,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:04:49,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 10:04:49,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442900849] [2025-03-04 10:04:49,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:04:49,498 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-04 10:04:49,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:04:49,498 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-04 10:04:49,498 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 10:04:49,498 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 132 [2025-03-04 10:04:49,498 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) [2025-03-04 10:04:49,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:04:49,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 132 [2025-03-04 10:04:49,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:04:49,720 INFO L124 PetriNetUnfolderBase]: 121/523 cut-off events. [2025-03-04 10:04:49,720 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2025-03-04 10:04:49,721 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. [2025-03-04 10:04:49,722 INFO L140 encePairwiseOnDemand]: 129/132 looper letters, 48 selfloop transitions, 3 changer transitions 0/121 dead transitions. [2025-03-04 10:04:49,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 121 transitions, 397 flow [2025-03-04 10:04:49,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-04 10:04:49,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-04 10:04:49,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 277 transitions. [2025-03-04 10:04:49,724 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6994949494949495 [2025-03-04 10:04:49,724 INFO L175 Difference]: Start difference. First operand has 117 places, 117 transitions, 283 flow. Second operand 3 states and 277 transitions. [2025-03-04 10:04:49,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 121 transitions, 397 flow [2025-03-04 10:04:49,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 121 transitions, 387 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-04 10:04:49,727 INFO L231 Difference]: Finished difference. Result has 118 places, 117 transitions, 288 flow [2025-03-04 10:04:49,727 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} [2025-03-04 10:04:49,727 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 1 predicate places. [2025-03-04 10:04:49,727 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 117 transitions, 288 flow [2025-03-04 10:04:49,727 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) [2025-03-04 10:04:49,728 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:04:49,728 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:04:49,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-04 10:04:49,933 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:49,933 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)] === [2025-03-04 10:04:49,934 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:04:49,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1224197334, now seen corresponding path program 1 times [2025-03-04 10:04:49,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:04:49,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1373307001] [2025-03-04 10:04:49,934 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:04:49,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:49,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:04:49,937 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:04:49,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-04 10:04:50,006 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-04 10:04:50,123 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-04 10:04:50,124 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:04:50,124 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:04:50,141 INFO L256 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-04 10:04:50,142 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:04:50,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:04:50,150 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:04:50,151 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:04:50,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373307001] [2025-03-04 10:04:50,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373307001] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:04:50,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:04:50,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-04 10:04:50,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609159280] [2025-03-04 10:04:50,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:04:50,151 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-04 10:04:50,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:04:50,152 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-04 10:04:50,152 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 10:04:50,228 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 132 [2025-03-04 10:04:50,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 117 transitions, 288 flow. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:50,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:04:50,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 132 [2025-03-04 10:04:50,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:04:50,435 INFO L124 PetriNetUnfolderBase]: 121/519 cut-off events. [2025-03-04 10:04:50,436 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2025-03-04 10:04:50,439 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 264 conditions per place. [2025-03-04 10:04:50,441 INFO L140 encePairwiseOnDemand]: 126/132 looper letters, 44 selfloop transitions, 5 changer transitions 0/115 dead transitions. [2025-03-04 10:04:50,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 115 transitions, 382 flow [2025-03-04 10:04:50,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-04 10:04:50,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-04 10:04:50,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 257 transitions. [2025-03-04 10:04:50,443 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.648989898989899 [2025-03-04 10:04:50,443 INFO L175 Difference]: Start difference. First operand has 118 places, 117 transitions, 288 flow. Second operand 3 states and 257 transitions. [2025-03-04 10:04:50,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 115 transitions, 382 flow [2025-03-04 10:04:50,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 115 transitions, 379 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-04 10:04:50,447 INFO L231 Difference]: Finished difference. Result has 117 places, 115 transitions, 291 flow [2025-03-04 10:04:50,447 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=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=291, PETRI_PLACES=117, PETRI_TRANSITIONS=115} [2025-03-04 10:04:50,447 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 0 predicate places. [2025-03-04 10:04:50,447 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 115 transitions, 291 flow [2025-03-04 10:04:50,448 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:04:50,448 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:04:50,448 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:04:50,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-04 10:04:50,648 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:50,649 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)] === [2025-03-04 10:04:50,649 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:04:50,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1224197335, now seen corresponding path program 1 times [2025-03-04 10:04:50,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:04:50,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1957629269] [2025-03-04 10:04:50,650 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:04:50,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:50,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:04:50,652 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:04:50,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-04 10:04:50,719 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-04 10:04:50,854 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-04 10:04:50,854 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:04:50,854 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:04:50,871 INFO L256 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-04 10:04:50,872 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:04:50,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-04 10:04:50,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:04:50,900 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:04:50,900 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:04:50,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957629269] [2025-03-04 10:04:50,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957629269] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:04:50,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:04:50,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 10:04:50,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456746257] [2025-03-04 10:04:50,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:04:50,900 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 10:04:50,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:04:50,901 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 10:04:50,901 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 10:04:51,065 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 132 [2025-03-04 10:04:51,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 115 transitions, 291 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) [2025-03-04 10:04:51,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:04:51,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 132 [2025-03-04 10:04:51,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:04:51,317 INFO L124 PetriNetUnfolderBase]: 121/515 cut-off events. [2025-03-04 10:04:51,317 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2025-03-04 10:04:51,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 846 conditions, 515 events. 121/515 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2520 event pairs, 100 based on Foata normal form. 4/421 useless extension candidates. Maximal degree in co-relation 808. Up to 263 conditions per place. [2025-03-04 10:04:51,319 INFO L140 encePairwiseOnDemand]: 127/132 looper letters, 45 selfloop transitions, 4 changer transitions 0/113 dead transitions. [2025-03-04 10:04:51,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 113 transitions, 385 flow [2025-03-04 10:04:51,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 10:04:51,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 10:04:51,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 331 transitions. [2025-03-04 10:04:51,321 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6268939393939394 [2025-03-04 10:04:51,321 INFO L175 Difference]: Start difference. First operand has 117 places, 115 transitions, 291 flow. Second operand 4 states and 331 transitions. [2025-03-04 10:04:51,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 113 transitions, 385 flow [2025-03-04 10:04:51,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 113 transitions, 375 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-04 10:04:51,323 INFO L231 Difference]: Finished difference. Result has 116 places, 113 transitions, 285 flow [2025-03-04 10:04:51,323 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} [2025-03-04 10:04:51,325 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, -1 predicate places. [2025-03-04 10:04:51,325 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 113 transitions, 285 flow [2025-03-04 10:04:51,326 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) [2025-03-04 10:04:51,326 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:04:51,326 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:04:51,338 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-04 10:04:51,526 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:51,527 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)] === [2025-03-04 10:04:51,527 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:04:51,527 INFO L85 PathProgramCache]: Analyzing trace with hash -367378697, now seen corresponding path program 1 times [2025-03-04 10:04:51,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:04:51,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [181558868] [2025-03-04 10:04:51,528 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:04:51,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:51,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:04:51,530 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:04:51,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-04 10:04:51,605 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-04 10:04:51,740 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-04 10:04:51,740 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:04:51,740 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:04:51,756 INFO L256 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-04 10:04:51,758 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:04:51,804 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2025-03-04 10:04:51,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2025-03-04 10:04:51,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:04:51,830 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:04:51,830 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:04:51,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181558868] [2025-03-04 10:04:51,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181558868] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:04:51,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:04:51,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-04 10:04:51,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6039744] [2025-03-04 10:04:51,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:04:51,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 10:04:51,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:04:51,831 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 10:04:51,831 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 10:04:51,944 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 132 [2025-03-04 10:04:51,944 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) [2025-03-04 10:04:51,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:04:51,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 132 [2025-03-04 10:04:51,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:04:52,184 INFO L124 PetriNetUnfolderBase]: 120/468 cut-off events. [2025-03-04 10:04:52,185 INFO L125 PetriNetUnfolderBase]: For 26/27 co-relation queries the response was YES. [2025-03-04 10:04:52,185 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. [2025-03-04 10:04:52,187 INFO L140 encePairwiseOnDemand]: 126/132 looper letters, 65 selfloop transitions, 5 changer transitions 0/133 dead transitions. [2025-03-04 10:04:52,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 133 transitions, 465 flow [2025-03-04 10:04:52,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 10:04:52,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 10:04:52,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 352 transitions. [2025-03-04 10:04:52,188 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2025-03-04 10:04:52,188 INFO L175 Difference]: Start difference. First operand has 116 places, 113 transitions, 285 flow. Second operand 4 states and 352 transitions. [2025-03-04 10:04:52,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 133 transitions, 465 flow [2025-03-04 10:04:52,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 133 transitions, 457 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-04 10:04:52,190 INFO L231 Difference]: Finished difference. Result has 114 places, 111 transitions, 283 flow [2025-03-04 10:04:52,191 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} [2025-03-04 10:04:52,191 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, -3 predicate places. [2025-03-04 10:04:52,191 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 111 transitions, 283 flow [2025-03-04 10:04:52,191 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) [2025-03-04 10:04:52,191 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:04:52,192 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:04:52,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-04 10:04:52,392 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:52,392 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)] === [2025-03-04 10:04:52,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:04:52,393 INFO L85 PathProgramCache]: Analyzing trace with hash -367378696, now seen corresponding path program 1 times [2025-03-04 10:04:52,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:04:52,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [944839591] [2025-03-04 10:04:52,393 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:04:52,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:52,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:04:52,395 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:04:52,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-04 10:04:52,472 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-04 10:04:52,620 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-04 10:04:52,620 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:04:52,620 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:04:52,640 INFO L256 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-04 10:04:52,641 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:04:52,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-04 10:04:52,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-03-04 10:04:52,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:04:52,774 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:04:52,774 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:04:52,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944839591] [2025-03-04 10:04:52,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944839591] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:04:52,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:04:52,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 10:04:52,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682796004] [2025-03-04 10:04:52,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:04:52,775 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-04 10:04:52,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:04:52,775 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-04 10:04:52,775 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-04 10:04:53,040 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 132 [2025-03-04 10:04:53,041 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) [2025-03-04 10:04:53,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:04:53,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 132 [2025-03-04 10:04:53,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:04:53,330 INFO L124 PetriNetUnfolderBase]: 123/542 cut-off events. [2025-03-04 10:04:53,331 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2025-03-04 10:04:53,331 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 2763 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. [2025-03-04 10:04:53,333 INFO L140 encePairwiseOnDemand]: 126/132 looper letters, 52 selfloop transitions, 5 changer transitions 0/118 dead transitions. [2025-03-04 10:04:53,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 118 transitions, 427 flow [2025-03-04 10:04:53,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 10:04:53,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 10:04:53,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 340 transitions. [2025-03-04 10:04:53,335 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6439393939393939 [2025-03-04 10:04:53,335 INFO L175 Difference]: Start difference. First operand has 114 places, 111 transitions, 283 flow. Second operand 4 states and 340 transitions. [2025-03-04 10:04:53,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 118 transitions, 427 flow [2025-03-04 10:04:53,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 118 transitions, 411 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-04 10:04:53,339 INFO L231 Difference]: Finished difference. Result has 116 places, 115 transitions, 319 flow [2025-03-04 10:04:53,339 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} [2025-03-04 10:04:53,340 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, -1 predicate places. [2025-03-04 10:04:53,340 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 115 transitions, 319 flow [2025-03-04 10:04:53,340 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) [2025-03-04 10:04:53,341 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:04:53,341 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:04:53,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-04 10:04:53,542 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:53,542 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)] === [2025-03-04 10:04:53,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:04:53,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1496163068, now seen corresponding path program 1 times [2025-03-04 10:04:53,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:04:53,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [95830917] [2025-03-04 10:04:53,543 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:04:53,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:53,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:04:53,545 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:04:53,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-04 10:04:53,634 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-04 10:04:53,775 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-04 10:04:53,775 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:04:53,775 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:04:53,793 INFO L256 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-04 10:04:53,794 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:04:53,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-04 10:04:53,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2025-03-04 10:04:53,925 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-03-04 10:04:53,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2025-03-04 10:04:53,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-04 10:04:53,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-04 10:04:54,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-04 10:04:54,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:04:54,033 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:04:54,033 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:04:54,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95830917] [2025-03-04 10:04:54,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95830917] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:04:54,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:04:54,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-04 10:04:54,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892694710] [2025-03-04 10:04:54,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:04:54,033 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-04 10:04:54,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:04:54,034 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-04 10:04:54,034 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2025-03-04 10:04:54,903 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 132 [2025-03-04 10:04:54,904 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) [2025-03-04 10:04:54,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:04:54,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 132 [2025-03-04 10:04:54,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:04:55,567 INFO L124 PetriNetUnfolderBase]: 123/541 cut-off events. [2025-03-04 10:04:55,567 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2025-03-04 10:04:55,568 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. [2025-03-04 10:04:55,569 INFO L140 encePairwiseOnDemand]: 120/132 looper letters, 65 selfloop transitions, 11 changer transitions 0/131 dead transitions. [2025-03-04 10:04:55,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 131 transitions, 509 flow [2025-03-04 10:04:55,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-04 10:04:55,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-04 10:04:55,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 714 transitions. [2025-03-04 10:04:55,571 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49173553719008267 [2025-03-04 10:04:55,571 INFO L175 Difference]: Start difference. First operand has 116 places, 115 transitions, 319 flow. Second operand 11 states and 714 transitions. [2025-03-04 10:04:55,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 131 transitions, 509 flow [2025-03-04 10:04:55,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 131 transitions, 507 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-04 10:04:55,574 INFO L231 Difference]: Finished difference. Result has 130 places, 120 transitions, 375 flow [2025-03-04 10:04:55,574 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} [2025-03-04 10:04:55,574 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 13 predicate places. [2025-03-04 10:04:55,574 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 120 transitions, 375 flow [2025-03-04 10:04:55,575 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) [2025-03-04 10:04:55,575 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:04:55,575 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:04:55,587 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-04 10:04:55,775 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:55,776 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)] === [2025-03-04 10:04:55,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:04:55,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1496163069, now seen corresponding path program 1 times [2025-03-04 10:04:55,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:04:55,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1824935873] [2025-03-04 10:04:55,776 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:04:55,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:55,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:04:55,779 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:04:55,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-04 10:04:55,850 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-04 10:04:55,989 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-04 10:04:55,989 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:04:55,989 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:04:56,007 INFO L256 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 36 conjuncts are in the unsatisfiable core [2025-03-04 10:04:56,013 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:04:56,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-04 10:04:56,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-04 10:04:56,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2025-03-04 10:04:56,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2025-03-04 10:04:56,177 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-03-04 10:04:56,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2025-03-04 10:04:56,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-03-04 10:04:56,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-04 10:04:56,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-04 10:04:56,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-04 10:04:56,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-04 10:04:56,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-04 10:04:56,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-04 10:04:56,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:04:56,341 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:04:56,341 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:04:56,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824935873] [2025-03-04 10:04:56,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824935873] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:04:56,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:04:56,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-04 10:04:56,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676800381] [2025-03-04 10:04:56,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:04:56,341 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-04 10:04:56,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:04:56,341 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-04 10:04:56,342 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-03-04 10:04:57,384 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 132 [2025-03-04 10:04:57,385 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) [2025-03-04 10:04:57,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:04:57,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 132 [2025-03-04 10:04:57,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:04:57,909 INFO L124 PetriNetUnfolderBase]: 123/540 cut-off events. [2025-03-04 10:04:57,909 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2025-03-04 10:04:57,910 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 2754 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. [2025-03-04 10:04:57,911 INFO L140 encePairwiseOnDemand]: 121/132 looper letters, 68 selfloop transitions, 10 changer transitions 0/131 dead transitions. [2025-03-04 10:04:57,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 131 transitions, 561 flow [2025-03-04 10:04:57,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-04 10:04:57,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-04 10:04:57,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 638 transitions. [2025-03-04 10:04:57,913 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2025-03-04 10:04:57,913 INFO L175 Difference]: Start difference. First operand has 130 places, 120 transitions, 375 flow. Second operand 10 states and 638 transitions. [2025-03-04 10:04:57,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 131 transitions, 561 flow [2025-03-04 10:04:57,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 131 transitions, 557 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-04 10:04:57,916 INFO L231 Difference]: Finished difference. Result has 138 places, 120 transitions, 395 flow [2025-03-04 10:04:57,916 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} [2025-03-04 10:04:57,916 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 21 predicate places. [2025-03-04 10:04:57,916 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 120 transitions, 395 flow [2025-03-04 10:04:57,917 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) [2025-03-04 10:04:57,917 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:04:57,917 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:04:57,929 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-04 10:04:58,117 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:58,117 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)] === [2025-03-04 10:04:58,118 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:04:58,118 INFO L85 PathProgramCache]: Analyzing trace with hash -863584441, now seen corresponding path program 1 times [2025-03-04 10:04:58,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:04:58,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2111806837] [2025-03-04 10:04:58,118 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:04:58,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:58,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:04:58,120 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:04:58,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-04 10:04:58,187 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-04 10:04:58,321 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-04 10:04:58,321 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:04:58,321 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:04:58,339 INFO L256 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-04 10:04:58,341 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:04:58,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-04 10:04:58,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:04:58,370 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:04:58,370 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:04:58,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111806837] [2025-03-04 10:04:58,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111806837] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:04:58,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:04:58,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 10:04:58,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386037787] [2025-03-04 10:04:58,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:04:58,370 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 10:04:58,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:04:58,370 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 10:04:58,370 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 10:04:58,469 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 132 [2025-03-04 10:04:58,470 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) [2025-03-04 10:04:58,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:04:58,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 132 [2025-03-04 10:04:58,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:04:58,676 INFO L124 PetriNetUnfolderBase]: 122/531 cut-off events. [2025-03-04 10:04:58,676 INFO L125 PetriNetUnfolderBase]: For 67/67 co-relation queries the response was YES. [2025-03-04 10:04:58,677 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 2707 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. [2025-03-04 10:04:58,678 INFO L140 encePairwiseOnDemand]: 127/132 looper letters, 45 selfloop transitions, 9 changer transitions 0/118 dead transitions. [2025-03-04 10:04:58,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 118 transitions, 499 flow [2025-03-04 10:04:58,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 10:04:58,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 10:04:58,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 337 transitions. [2025-03-04 10:04:58,680 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6382575757575758 [2025-03-04 10:04:58,680 INFO L175 Difference]: Start difference. First operand has 138 places, 120 transitions, 395 flow. Second operand 4 states and 337 transitions. [2025-03-04 10:04:58,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 118 transitions, 499 flow [2025-03-04 10:04:58,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 118 transitions, 479 flow, removed 0 selfloop flow, removed 9 redundant places. [2025-03-04 10:04:58,682 INFO L231 Difference]: Finished difference. Result has 130 places, 118 transitions, 389 flow [2025-03-04 10:04:58,682 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} [2025-03-04 10:04:58,683 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 13 predicate places. [2025-03-04 10:04:58,683 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 118 transitions, 389 flow [2025-03-04 10:04:58,683 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) [2025-03-04 10:04:58,683 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:04:58,683 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:04:58,699 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-04 10:04:58,884 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:58,884 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)] === [2025-03-04 10:04:58,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:04:58,884 INFO L85 PathProgramCache]: Analyzing trace with hash -863584442, now seen corresponding path program 1 times [2025-03-04 10:04:58,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:04:58,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1049307948] [2025-03-04 10:04:58,885 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:04:58,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:58,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:04:58,886 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:04:58,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-04 10:04:58,963 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-04 10:04:59,074 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-04 10:04:59,074 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:04:59,074 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:04:59,091 INFO L256 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-04 10:04:59,092 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:04:59,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:04:59,105 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:04:59,105 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:04:59,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049307948] [2025-03-04 10:04:59,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049307948] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:04:59,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:04:59,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 10:04:59,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468351551] [2025-03-04 10:04:59,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:04:59,106 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 10:04:59,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:04:59,106 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 10:04:59,106 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 10:04:59,230 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 132 [2025-03-04 10:04:59,230 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) [2025-03-04 10:04:59,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:04:59,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 132 [2025-03-04 10:04:59,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:04:59,406 INFO L124 PetriNetUnfolderBase]: 122/523 cut-off events. [2025-03-04 10:04:59,406 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2025-03-04 10:04:59,407 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 2648 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. [2025-03-04 10:04:59,409 INFO L140 encePairwiseOnDemand]: 127/132 looper letters, 47 selfloop transitions, 9 changer transitions 0/116 dead transitions. [2025-03-04 10:04:59,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 116 transitions, 497 flow [2025-03-04 10:04:59,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 10:04:59,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 10:04:59,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 331 transitions. [2025-03-04 10:04:59,410 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6268939393939394 [2025-03-04 10:04:59,410 INFO L175 Difference]: Start difference. First operand has 130 places, 118 transitions, 389 flow. Second operand 4 states and 331 transitions. [2025-03-04 10:04:59,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 116 transitions, 497 flow [2025-03-04 10:04:59,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 116 transitions, 479 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-04 10:04:59,412 INFO L231 Difference]: Finished difference. Result has 128 places, 116 transitions, 385 flow [2025-03-04 10:04:59,412 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} [2025-03-04 10:04:59,412 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 11 predicate places. [2025-03-04 10:04:59,413 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 116 transitions, 385 flow [2025-03-04 10:04:59,413 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) [2025-03-04 10:04:59,413 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:04:59,413 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:04:59,425 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-04 10:04:59,613 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:59,614 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)] === [2025-03-04 10:04:59,614 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:04:59,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1546672742, now seen corresponding path program 1 times [2025-03-04 10:04:59,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:04:59,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1873828174] [2025-03-04 10:04:59,614 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:04:59,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:04:59,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:04:59,617 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:04:59,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-04 10:04:59,693 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-04 10:04:59,821 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-04 10:04:59,822 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:04:59,822 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:04:59,841 INFO L256 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-04 10:04:59,842 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:04:59,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:04:59,861 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 10:04:59,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:04:59,888 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:04:59,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873828174] [2025-03-04 10:04:59,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873828174] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 10:04:59,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-04 10:04:59,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2025-03-04 10:04:59,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929187612] [2025-03-04 10:04:59,888 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-04 10:04:59,888 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-04 10:04:59,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:04:59,889 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-04 10:04:59,889 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-03-04 10:04:59,889 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 132 [2025-03-04 10:04:59,889 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) [2025-03-04 10:04:59,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:04:59,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 132 [2025-03-04 10:04:59,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:05:00,261 INFO L124 PetriNetUnfolderBase]: 122/573 cut-off events. [2025-03-04 10:05:00,262 INFO L125 PetriNetUnfolderBase]: For 151/151 co-relation queries the response was YES. [2025-03-04 10:05:00,263 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 2788 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. [2025-03-04 10:05:00,264 INFO L140 encePairwiseOnDemand]: 128/132 looper letters, 62 selfloop transitions, 11 changer transitions 0/135 dead transitions. [2025-03-04 10:05:00,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 135 transitions, 653 flow [2025-03-04 10:05:00,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-04 10:05:00,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-04 10:05:00,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 518 transitions. [2025-03-04 10:05:00,266 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6540404040404041 [2025-03-04 10:05:00,266 INFO L175 Difference]: Start difference. First operand has 128 places, 116 transitions, 385 flow. Second operand 6 states and 518 transitions. [2025-03-04 10:05:00,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 135 transitions, 653 flow [2025-03-04 10:05:00,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 135 transitions, 609 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-04 10:05:00,268 INFO L231 Difference]: Finished difference. Result has 134 places, 121 transitions, 453 flow [2025-03-04 10:05:00,268 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} [2025-03-04 10:05:00,270 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 17 predicate places. [2025-03-04 10:05:00,270 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 121 transitions, 453 flow [2025-03-04 10:05:00,270 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) [2025-03-04 10:05:00,270 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:05:00,270 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:05:00,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-04 10:05:00,470 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:05:00,471 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-04 10:05:00,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:05:00,471 INFO L85 PathProgramCache]: Analyzing trace with hash -575276063, now seen corresponding path program 1 times [2025-03-04 10:05:00,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:05:00,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1022981319] [2025-03-04 10:05:00,472 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:05:00,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:05:00,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:05:00,473 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:05:00,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-04 10:05:00,568 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-04 10:05:00,730 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-04 10:05:00,730 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:05:00,730 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:05:00,750 INFO L256 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-04 10:05:00,754 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:05:00,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2025-03-04 10:05:00,885 INFO L349 Elim1Store]: treesize reduction 90, result has 30.2 percent of original size [2025-03-04 10:05:00,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 52 [2025-03-04 10:05:00,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 29 [2025-03-04 10:05:00,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 29 [2025-03-04 10:05:00,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 21 [2025-03-04 10:05:00,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-03-04 10:05:01,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:05:01,029 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 10:05:01,075 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_573 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (select |c_#valid| (select (select (store |c_#memory_$Pointer$#3.base| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_573) |c_~#c~0.base|) (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|)))) (_ bv1 1)))) is different from false [2025-03-04 10:05:01,091 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_573 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| (select (select (store |c_#memory_$Pointer$#3.base| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_573) |c_~#c~0.base|) (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|))))))) is different from false [2025-03-04 10:05:01,185 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 10:05:01,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2025-03-04 10:05:01,200 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 10:05:01,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 55 [2025-03-04 10:05:01,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2025-03-04 10:05:02,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2025-03-04 10:05:02,396 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:05:02,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022981319] [2025-03-04 10:05:02,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022981319] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 10:05:02,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-04 10:05:02,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2025-03-04 10:05:02,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949866728] [2025-03-04 10:05:02,396 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-04 10:05:02,396 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-04 10:05:02,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:05:02,397 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-04 10:05:02,397 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=196, Unknown=5, NotChecked=58, Total=306 [2025-03-04 10:05:02,763 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 132 [2025-03-04 10:05:02,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 121 transitions, 453 flow. Second operand has 18 states, 18 states have (on average 30.833333333333332) internal successors, (555), 18 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:05:02,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:05:02,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 132 [2025-03-04 10:05:02,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:05:03,848 INFO L124 PetriNetUnfolderBase]: 329/1030 cut-off events. [2025-03-04 10:05:03,848 INFO L125 PetriNetUnfolderBase]: For 120/120 co-relation queries the response was YES. [2025-03-04 10:05:03,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2008 conditions, 1030 events. 329/1030 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5931 event pairs, 292 based on Foata normal form. 0/800 useless extension candidates. Maximal degree in co-relation 1910. Up to 679 conditions per place. [2025-03-04 10:05:03,854 INFO L140 encePairwiseOnDemand]: 124/132 looper letters, 79 selfloop transitions, 24 changer transitions 0/132 dead transitions. [2025-03-04 10:05:03,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 132 transitions, 699 flow [2025-03-04 10:05:03,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-04 10:05:03,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-04 10:05:03,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 406 transitions. [2025-03-04 10:05:03,857 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2796143250688705 [2025-03-04 10:05:03,857 INFO L175 Difference]: Start difference. First operand has 134 places, 121 transitions, 453 flow. Second operand 11 states and 406 transitions. [2025-03-04 10:05:03,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 132 transitions, 699 flow [2025-03-04 10:05:03,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 132 transitions, 683 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-03-04 10:05:03,860 INFO L231 Difference]: Finished difference. Result has 146 places, 126 transitions, 527 flow [2025-03-04 10:05:03,861 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=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=527, PETRI_PLACES=146, PETRI_TRANSITIONS=126} [2025-03-04 10:05:03,862 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 29 predicate places. [2025-03-04 10:05:03,862 INFO L471 AbstractCegarLoop]: Abstraction has has 146 places, 126 transitions, 527 flow [2025-03-04 10:05:03,862 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 30.833333333333332) internal successors, (555), 18 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:05:03,862 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:05:03,862 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:05:03,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-04 10:05:04,063 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:05:04,063 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-04 10:05:04,063 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:05:04,063 INFO L85 PathProgramCache]: Analyzing trace with hash -575276062, now seen corresponding path program 1 times [2025-03-04 10:05:04,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:05:04,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1332098178] [2025-03-04 10:05:04,064 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:05:04,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:05:04,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:05:04,065 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:05:04,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-04 10:05:04,149 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-04 10:05:04,307 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-04 10:05:04,308 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:05:04,308 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:05:04,329 INFO L256 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 41 conjuncts are in the unsatisfiable core [2025-03-04 10:05:04,331 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:05:04,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2025-03-04 10:05:04,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-04 10:05:04,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2025-03-04 10:05:04,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2025-03-04 10:05:04,542 INFO L349 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2025-03-04 10:05:04,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 29 [2025-03-04 10:05:04,568 INFO L349 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2025-03-04 10:05:04,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2025-03-04 10:05:04,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2025-03-04 10:05:04,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 27 [2025-03-04 10:05:04,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2025-03-04 10:05:04,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 27 [2025-03-04 10:05:04,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 19 [2025-03-04 10:05:04,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-04 10:05:04,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2025-03-04 10:05:04,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:05:04,715 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 10:05:04,838 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|)))) (and (forall ((v_ArrVal_681 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$#3.offset| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_681) |c_~#c~0.base|) .cse1))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (forall ((v_ArrVal_681 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_682 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$#3.offset| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_681) |c_~#c~0.base|) .cse1)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#3.base| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_682) |c_~#c~0.base|) .cse1)))))) is different from false [2025-03-04 10:05:05,187 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 10:05:05,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 49 [2025-03-04 10:05:05,195 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 10:05:05,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 41 [2025-03-04 10:05:05,212 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 10:05:05,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 77 [2025-03-04 10:05:05,239 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 10:05:05,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 113 [2025-03-04 10:05:05,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2025-03-04 10:05:05,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2025-03-04 10:05:05,690 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 10:05:05,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 38 [2025-03-04 10:05:05,709 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 10:05:05,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 55 [2025-03-04 10:05:05,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2025-03-04 10:05:07,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2025-03-04 10:05:07,845 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:05:07,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332098178] [2025-03-04 10:05:07,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332098178] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 10:05:07,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-04 10:05:07,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2025-03-04 10:05:07,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149203999] [2025-03-04 10:05:07,845 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-04 10:05:07,846 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-04 10:05:07,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:05:07,847 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-04 10:05:07,847 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=225, Unknown=8, NotChecked=30, Total=306 [2025-03-04 10:05:09,844 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 132 [2025-03-04 10:05:09,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 126 transitions, 527 flow. Second operand has 18 states, 18 states have (on average 20.88888888888889) internal successors, (376), 18 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:05:09,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:05:09,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 132 [2025-03-04 10:05:09,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:05:12,654 INFO L124 PetriNetUnfolderBase]: 465/1262 cut-off events. [2025-03-04 10:05:12,654 INFO L125 PetriNetUnfolderBase]: For 178/178 co-relation queries the response was YES. [2025-03-04 10:05:12,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2572 conditions, 1262 events. 465/1262 cut-off events. For 178/178 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7426 event pairs, 422 based on Foata normal form. 6/843 useless extension candidates. Maximal degree in co-relation 2483. Up to 955 conditions per place. [2025-03-04 10:05:12,659 INFO L140 encePairwiseOnDemand]: 122/132 looper letters, 86 selfloop transitions, 26 changer transitions 0/131 dead transitions. [2025-03-04 10:05:12,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 131 transitions, 765 flow [2025-03-04 10:05:12,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-04 10:05:12,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-04 10:05:12,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 343 transitions. [2025-03-04 10:05:12,661 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.1998834498834499 [2025-03-04 10:05:12,661 INFO L175 Difference]: Start difference. First operand has 146 places, 126 transitions, 527 flow. Second operand 13 states and 343 transitions. [2025-03-04 10:05:12,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 131 transitions, 765 flow [2025-03-04 10:05:12,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 131 transitions, 735 flow, removed 10 selfloop flow, removed 3 redundant places. [2025-03-04 10:05:12,664 INFO L231 Difference]: Finished difference. Result has 157 places, 128 transitions, 563 flow [2025-03-04 10:05:12,664 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=497, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=563, PETRI_PLACES=157, PETRI_TRANSITIONS=128} [2025-03-04 10:05:12,664 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 40 predicate places. [2025-03-04 10:05:12,664 INFO L471 AbstractCegarLoop]: Abstraction has has 157 places, 128 transitions, 563 flow [2025-03-04 10:05:12,665 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 20.88888888888889) internal successors, (376), 18 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:05:12,665 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:05:12,665 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1] [2025-03-04 10:05:12,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-04 10:05:12,865 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:05:12,865 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2025-03-04 10:05:12,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:05:12,866 INFO L85 PathProgramCache]: Analyzing trace with hash 622221599, now seen corresponding path program 2 times [2025-03-04 10:05:12,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:05:12,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1579689851] [2025-03-04 10:05:12,866 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 10:05:12,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:05:12,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:05:12,868 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:05:12,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-04 10:05:12,973 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-03-04 10:05:13,183 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-03-04 10:05:13,183 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 10:05:13,183 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:05:13,209 INFO L256 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-04 10:05:13,210 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:05:13,256 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:05:13,256 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 10:05:13,339 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:05:13,339 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 10:05:13,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579689851] [2025-03-04 10:05:13,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579689851] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 10:05:13,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-04 10:05:13,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2025-03-04 10:05:13,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997072197] [2025-03-04 10:05:13,339 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-04 10:05:13,339 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-04 10:05:13,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 10:05:13,340 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-04 10:05:13,340 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2025-03-04 10:05:13,340 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 132 [2025-03-04 10:05:13,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 128 transitions, 563 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) [2025-03-04 10:05:13,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:05:13,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 132 [2025-03-04 10:05:13,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:05:14,101 INFO L124 PetriNetUnfolderBase]: 122/681 cut-off events. [2025-03-04 10:05:14,102 INFO L125 PetriNetUnfolderBase]: For 539/539 co-relation queries the response was YES. [2025-03-04 10:05:14,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1630 conditions, 681 events. 122/681 cut-off events. For 539/539 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2730 event pairs, 100 based on Foata normal form. 12/611 useless extension candidates. Maximal degree in co-relation 1541. Up to 256 conditions per place. [2025-03-04 10:05:14,105 INFO L140 encePairwiseOnDemand]: 128/132 looper letters, 92 selfloop transitions, 23 changer transitions 0/180 dead transitions. [2025-03-04 10:05:14,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 180 transitions, 1309 flow [2025-03-04 10:05:14,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-04 10:05:14,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-04 10:05:14,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1007 transitions. [2025-03-04 10:05:14,108 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6357323232323232 [2025-03-04 10:05:14,108 INFO L175 Difference]: Start difference. First operand has 157 places, 128 transitions, 563 flow. Second operand 12 states and 1007 transitions. [2025-03-04 10:05:14,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 180 transitions, 1309 flow [2025-03-04 10:05:14,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 180 transitions, 1157 flow, removed 0 selfloop flow, removed 10 redundant places. [2025-03-04 10:05:14,114 INFO L231 Difference]: Finished difference. Result has 165 places, 141 transitions, 770 flow [2025-03-04 10:05:14,114 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=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=770, PETRI_PLACES=165, PETRI_TRANSITIONS=141} [2025-03-04 10:05:14,114 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 48 predicate places. [2025-03-04 10:05:14,114 INFO L471 AbstractCegarLoop]: Abstraction has has 165 places, 141 transitions, 770 flow [2025-03-04 10:05:14,115 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) [2025-03-04 10:05:14,115 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:05:14,115 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1] [2025-03-04 10:05:14,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-04 10:05:14,315 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:05:14,315 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)] === [2025-03-04 10:05:14,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:05:14,316 INFO L85 PathProgramCache]: Analyzing trace with hash -838641601, now seen corresponding path program 3 times [2025-03-04 10:05:14,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 10:05:14,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [247986331] [2025-03-04 10:05:14,317 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 10:05:14,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:05:14,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:05:14,318 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 10:05:14,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-04 10:05:14,505 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 97 statements into 12 equivalence classes.