./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/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_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c -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 be394a9cdc866c1e1426a3fe296e99873bcf37ee5e7e1c9e487b239a3e0a8fbe --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 19:20:06,788 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 19:20:06,870 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-24 19:20:06,875 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 19:20:06,876 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 19:20:06,900 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 19:20:06,902 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 19:20:06,902 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 19:20:06,903 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 19:20:06,904 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 19:20:06,906 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 19:20:06,906 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 19:20:06,907 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 19:20:06,907 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 19:20:06,907 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 19:20:06,907 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 19:20:06,908 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 19:20:06,909 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 19:20:06,909 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 19:20:06,909 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 19:20:06,910 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-24 19:20:06,910 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-24 19:20:06,910 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-24 19:20:06,910 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 19:20:06,911 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-24 19:20:06,911 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 19:20:06,911 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-24 19:20:06,911 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 19:20:06,911 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 19:20:06,912 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 19:20:06,912 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 19:20:06,912 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 19:20:06,912 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 19:20:06,912 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:20:06,912 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 19:20:06,913 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 19:20:06,913 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 19:20:06,913 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 19:20:06,913 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 19:20:06,913 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 19:20:06,913 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 19:20:06,915 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 19:20:06,915 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be394a9cdc866c1e1426a3fe296e99873bcf37ee5e7e1c9e487b239a3e0a8fbe [2024-10-24 19:20:07,137 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 19:20:07,158 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 19:20:07,161 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 19:20:07,162 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 19:20:07,162 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 19:20:07,163 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c [2024-10-24 19:20:08,435 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 19:20:08,623 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 19:20:08,623 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c [2024-10-24 19:20:08,630 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ec1e0499/84e4f4d3f44f44198c0aca90cf1844c6/FLAG1f8e47df4 [2024-10-24 19:20:08,642 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ec1e0499/84e4f4d3f44f44198c0aca90cf1844c6 [2024-10-24 19:20:08,645 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 19:20:08,646 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 19:20:08,650 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 19:20:08,650 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 19:20:08,656 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 19:20:08,657 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:20:08" (1/1) ... [2024-10-24 19:20:08,660 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ec34ef8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:20:08, skipping insertion in model container [2024-10-24 19:20:08,660 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:20:08" (1/1) ... [2024-10-24 19:20:08,682 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 19:20:08,913 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:20:08,952 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) [2024-10-24 19:20:08,953 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@78d4faed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:20:08, skipping insertion in model container [2024-10-24 19:20:08,953 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 19:20:08,953 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-10-24 19:20:08,954 INFO L158 Benchmark]: Toolchain (without parser) took 307.40ms. Allocated memory is still 178.3MB. Free memory was 122.9MB in the beginning and 152.3MB in the end (delta: -29.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-10-24 19:20:08,955 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 98.6MB. Free memory is still 53.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-24 19:20:08,955 INFO L158 Benchmark]: CACSL2BoogieTranslator took 302.78ms. Allocated memory is still 178.3MB. Free memory was 122.9MB in the beginning and 152.3MB in the end (delta: -29.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-10-24 19:20:08,956 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 98.6MB. Free memory is still 53.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 302.78ms. Allocated memory is still 178.3MB. Free memory was 122.9MB in the beginning and 152.3MB in the end (delta: -29.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 159]: 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/current/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_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c -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 be394a9cdc866c1e1426a3fe296e99873bcf37ee5e7e1c9e487b239a3e0a8fbe --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 19:20:10,765 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 19:20:10,836 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-10-24 19:20:10,841 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 19:20:10,842 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 19:20:10,866 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 19:20:10,866 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 19:20:10,867 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 19:20:10,867 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 19:20:10,867 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 19:20:10,867 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 19:20:10,868 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 19:20:10,868 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 19:20:10,871 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 19:20:10,872 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 19:20:10,872 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 19:20:10,872 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 19:20:10,872 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 19:20:10,872 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 19:20:10,873 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 19:20:10,873 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-24 19:20:10,876 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-24 19:20:10,876 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-24 19:20:10,876 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 19:20:10,876 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-24 19:20:10,876 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-24 19:20:10,877 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 19:20:10,877 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-24 19:20:10,877 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-24 19:20:10,877 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 19:20:10,877 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 19:20:10,877 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 19:20:10,878 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 19:20:10,878 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 19:20:10,878 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 19:20:10,878 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:20:10,878 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 19:20:10,878 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 19:20:10,879 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-24 19:20:10,879 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-10-24 19:20:10,879 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 19:20:10,882 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 19:20:10,882 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 19:20:10,882 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 19:20:10,882 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-24 19:20:10,882 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be394a9cdc866c1e1426a3fe296e99873bcf37ee5e7e1c9e487b239a3e0a8fbe [2024-10-24 19:20:11,159 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 19:20:11,181 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 19:20:11,185 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 19:20:11,186 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 19:20:11,186 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 19:20:11,188 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c [2024-10-24 19:20:12,499 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 19:20:12,697 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 19:20:12,697 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c [2024-10-24 19:20:12,705 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b64d7340/40683a346ff04639a1336adb57c6488a/FLAG1da572fd4 [2024-10-24 19:20:12,717 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b64d7340/40683a346ff04639a1336adb57c6488a [2024-10-24 19:20:12,719 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 19:20:12,720 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 19:20:12,722 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 19:20:12,722 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 19:20:12,726 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 19:20:12,727 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:20:12" (1/1) ... [2024-10-24 19:20:12,728 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@728702fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:20:12, skipping insertion in model container [2024-10-24 19:20:12,728 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:20:12" (1/1) ... [2024-10-24 19:20:12,748 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 19:20:12,949 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:20:12,963 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-10-24 19:20:12,967 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 19:20:12,999 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:20:13,004 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 19:20:13,032 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:20:13,055 INFO L204 MainTranslator]: Completed translation [2024-10-24 19:20:13,055 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:20:13 WrapperNode [2024-10-24 19:20:13,056 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 19:20:13,056 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 19:20:13,057 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 19:20:13,057 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 19:20:13,062 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:20:13" (1/1) ... [2024-10-24 19:20:13,076 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:20:13" (1/1) ... [2024-10-24 19:20:13,109 INFO L138 Inliner]: procedures = 26, calls = 47, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 304 [2024-10-24 19:20:13,110 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 19:20:13,110 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 19:20:13,110 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 19:20:13,110 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 19:20:13,120 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:20:13" (1/1) ... [2024-10-24 19:20:13,120 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:20:13" (1/1) ... [2024-10-24 19:20:13,130 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:20:13" (1/1) ... [2024-10-24 19:20:13,152 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-10-24 19:20:13,152 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:20:13" (1/1) ... [2024-10-24 19:20:13,152 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:20:13" (1/1) ... [2024-10-24 19:20:13,168 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:20:13" (1/1) ... [2024-10-24 19:20:13,172 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:20:13" (1/1) ... [2024-10-24 19:20:13,178 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:20:13" (1/1) ... [2024-10-24 19:20:13,183 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:20:13" (1/1) ... [2024-10-24 19:20:13,186 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 19:20:13,189 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 19:20:13,189 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 19:20:13,189 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 19:20:13,190 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:20:13" (1/1) ... [2024-10-24 19:20:13,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:20:13,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:20:13,218 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) [2024-10-24 19:20:13,226 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 [2024-10-24 19:20:13,262 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 19:20:13,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-24 19:20:13,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-10-24 19:20:13,263 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-10-24 19:20:13,263 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-10-24 19:20:13,264 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-24 19:20:13,264 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-24 19:20:13,264 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-24 19:20:13,265 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-24 19:20:13,265 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-24 19:20:13,265 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-24 19:20:13,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-24 19:20:13,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-24 19:20:13,266 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-24 19:20:13,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 19:20:13,266 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 19:20:13,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-10-24 19:20:13,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-10-24 19:20:13,268 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-24 19:20:13,391 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 19:20:13,393 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 19:20:13,973 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-24 19:20:13,975 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 19:20:14,297 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 19:20:14,298 INFO L314 CfgBuilder]: Removed 6 assume(true) statements. [2024-10-24 19:20:14,298 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 07:20:14 BoogieIcfgContainer [2024-10-24 19:20:14,299 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 19:20:14,301 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 19:20:14,301 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 19:20:14,304 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 19:20:14,304 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 07:20:12" (1/3) ... [2024-10-24 19:20:14,305 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7581ae4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 07:20:14, skipping insertion in model container [2024-10-24 19:20:14,305 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:20:13" (2/3) ... [2024-10-24 19:20:14,305 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7581ae4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 07:20:14, skipping insertion in model container [2024-10-24 19:20:14,305 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 07:20:14" (3/3) ... [2024-10-24 19:20:14,306 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-ring.wvr.c [2024-10-24 19:20:14,321 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 19:20:14,321 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2024-10-24 19:20:14,322 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-24 19:20:14,396 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-24 19:20:14,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 73 transitions, 167 flow [2024-10-24 19:20:14,460 INFO L124 PetriNetUnfolderBase]: 8/70 cut-off events. [2024-10-24 19:20:14,461 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-24 19:20:14,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 70 events. 8/70 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 181 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 51. Up to 2 conditions per place. [2024-10-24 19:20:14,465 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 73 transitions, 167 flow [2024-10-24 19:20:14,468 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 69 transitions, 156 flow [2024-10-24 19:20:14,479 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 19:20:14,485 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;@11459143, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 19:20:14,486 INFO L334 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2024-10-24 19:20:14,489 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 19:20:14,489 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-24 19:20:14,490 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 19:20:14,490 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:20:14,490 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-24 19:20:14,491 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-24 19:20:14,495 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:20:14,496 INFO L85 PathProgramCache]: Analyzing trace with hash 921728, now seen corresponding path program 1 times [2024-10-24 19:20:14,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:20:14,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [223002264] [2024-10-24 19:20:14,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:20:14,506 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:20:14,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:20:14,509 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:20:14,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-10-24 19:20:14,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:20:14,584 INFO L255 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-24 19:20:14,588 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:20:14,644 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 [2024-10-24 19:20:14,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:20:14,657 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:20:14,657 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:20:14,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [223002264] [2024-10-24 19:20:14,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [223002264] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:20:14,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:20:14,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-24 19:20:14,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726790611] [2024-10-24 19:20:14,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:20:14,666 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:20:14,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:20:14,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:20:14,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:20:14,712 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2024-10-24 19:20:14,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2024-10-24 19:20:14,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:20:14,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2024-10-24 19:20:14,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:20:15,820 INFO L124 PetriNetUnfolderBase]: 5811/9204 cut-off events. [2024-10-24 19:20:15,820 INFO L125 PetriNetUnfolderBase]: For 366/366 co-relation queries the response was YES. [2024-10-24 19:20:15,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17448 conditions, 9204 events. 5811/9204 cut-off events. For 366/366 co-relation queries the response was YES. Maximal size of possible extension queue 680. Compared 62977 event pairs, 5236 based on Foata normal form. 514/6076 useless extension candidates. Maximal degree in co-relation 16836. Up to 7878 conditions per place. [2024-10-24 19:20:15,885 INFO L140 encePairwiseOnDemand]: 65/73 looper letters, 47 selfloop transitions, 2 changer transitions 0/62 dead transitions. [2024-10-24 19:20:15,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 62 transitions, 240 flow [2024-10-24 19:20:15,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:20:15,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:20:15,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 106 transitions. [2024-10-24 19:20:15,896 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4840182648401826 [2024-10-24 19:20:15,898 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 156 flow. Second operand 3 states and 106 transitions. [2024-10-24 19:20:15,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 62 transitions, 240 flow [2024-10-24 19:20:15,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 62 transitions, 228 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-24 19:20:15,910 INFO L231 Difference]: Finished difference. Result has 62 places, 62 transitions, 134 flow [2024-10-24 19:20:15,913 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=62, PETRI_TRANSITIONS=62} [2024-10-24 19:20:15,918 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, -9 predicate places. [2024-10-24 19:20:15,918 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 62 transitions, 134 flow [2024-10-24 19:20:15,918 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2024-10-24 19:20:15,918 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:20:15,919 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-24 19:20:15,922 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2024-10-24 19:20:16,120 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:20:16,122 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-24 19:20:16,122 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:20:16,122 INFO L85 PathProgramCache]: Analyzing trace with hash 921729, now seen corresponding path program 1 times [2024-10-24 19:20:16,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:20:16,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1995495539] [2024-10-24 19:20:16,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:20:16,123 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:20:16,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:20:16,126 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:20:16,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-10-24 19:20:16,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:20:16,197 INFO L255 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-24 19:20:16,198 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:20:16,213 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 8 treesize of output 7 [2024-10-24 19:20:16,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:20:16,378 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:20:16,378 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:20:16,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1995495539] [2024-10-24 19:20:16,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1995495539] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:20:16,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:20:16,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:20:16,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793833209] [2024-10-24 19:20:16,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:20:16,379 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:20:16,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:20:16,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:20:16,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:20:16,460 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2024-10-24 19:20:16,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 62 transitions, 134 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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) [2024-10-24 19:20:16,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:20:16,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2024-10-24 19:20:16,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:20:17,565 INFO L124 PetriNetUnfolderBase]: 5814/9213 cut-off events. [2024-10-24 19:20:17,566 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2024-10-24 19:20:17,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17248 conditions, 9213 events. 5814/9213 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 680. Compared 62976 event pairs, 5236 based on Foata normal form. 0/5567 useless extension candidates. Maximal degree in co-relation 17198. Up to 7891 conditions per place. [2024-10-24 19:20:17,627 INFO L140 encePairwiseOnDemand]: 60/73 looper letters, 51 selfloop transitions, 10 changer transitions 0/71 dead transitions. [2024-10-24 19:20:17,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 71 transitions, 276 flow [2024-10-24 19:20:17,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 19:20:17,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 19:20:17,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 132 transitions. [2024-10-24 19:20:17,631 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4520547945205479 [2024-10-24 19:20:17,631 INFO L175 Difference]: Start difference. First operand has 62 places, 62 transitions, 134 flow. Second operand 4 states and 132 transitions. [2024-10-24 19:20:17,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 71 transitions, 276 flow [2024-10-24 19:20:17,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 71 transitions, 270 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 19:20:17,634 INFO L231 Difference]: Finished difference. Result has 66 places, 71 transitions, 212 flow [2024-10-24 19:20:17,635 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=212, PETRI_PLACES=66, PETRI_TRANSITIONS=71} [2024-10-24 19:20:17,640 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, -5 predicate places. [2024-10-24 19:20:17,640 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 71 transitions, 212 flow [2024-10-24 19:20:17,640 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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) [2024-10-24 19:20:17,640 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:20:17,640 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-24 19:20:17,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2024-10-24 19:20:17,841 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:20:17,841 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-24 19:20:17,842 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:20:17,842 INFO L85 PathProgramCache]: Analyzing trace with hash 885811490, now seen corresponding path program 1 times [2024-10-24 19:20:17,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:20:17,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [67685807] [2024-10-24 19:20:17,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:20:17,842 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:20:17,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:20:17,845 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:20:17,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2024-10-24 19:20:17,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:20:17,894 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-24 19:20:17,895 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:20:17,906 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 8 treesize of output 7 [2024-10-24 19:20:18,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:20:18,024 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:20:18,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:20:18,248 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:20:18,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [67685807] [2024-10-24 19:20:18,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [67685807] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:20:18,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:20:18,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-24 19:20:18,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745016576] [2024-10-24 19:20:18,249 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:20:18,249 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-24 19:20:18,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:20:18,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-24 19:20:18,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-10-24 19:20:18,367 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2024-10-24 19:20:18,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 71 transitions, 212 flow. Second operand has 10 states, 10 states have (on average 18.0) internal successors, (180), 10 states have internal predecessors, (180), 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) [2024-10-24 19:20:18,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:20:18,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2024-10-24 19:20:18,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:20:20,282 INFO L124 PetriNetUnfolderBase]: 5823/9240 cut-off events. [2024-10-24 19:20:20,282 INFO L125 PetriNetUnfolderBase]: For 84/84 co-relation queries the response was YES. [2024-10-24 19:20:20,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17366 conditions, 9240 events. 5823/9240 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 680. Compared 63326 event pairs, 5236 based on Foata normal form. 0/5594 useless extension candidates. Maximal degree in co-relation 17212. Up to 7894 conditions per place. [2024-10-24 19:20:20,341 INFO L140 encePairwiseOnDemand]: 60/73 looper letters, 51 selfloop transitions, 37 changer transitions 0/98 dead transitions. [2024-10-24 19:20:20,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 98 transitions, 508 flow [2024-10-24 19:20:20,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-24 19:20:20,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-24 19:20:20,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 267 transitions. [2024-10-24 19:20:20,343 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36575342465753424 [2024-10-24 19:20:20,344 INFO L175 Difference]: Start difference. First operand has 66 places, 71 transitions, 212 flow. Second operand 10 states and 267 transitions. [2024-10-24 19:20:20,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 98 transitions, 508 flow [2024-10-24 19:20:20,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 98 transitions, 508 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-24 19:20:20,346 INFO L231 Difference]: Finished difference. Result has 78 places, 98 transitions, 456 flow [2024-10-24 19:20:20,346 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=456, PETRI_PLACES=78, PETRI_TRANSITIONS=98} [2024-10-24 19:20:20,347 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 7 predicate places. [2024-10-24 19:20:20,347 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 98 transitions, 456 flow [2024-10-24 19:20:20,347 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.0) internal successors, (180), 10 states have internal predecessors, (180), 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) [2024-10-24 19:20:20,347 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:20:20,347 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:20:20,351 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2024-10-24 19:20:20,549 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:20:20,550 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-24 19:20:20,550 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:20:20,550 INFO L85 PathProgramCache]: Analyzing trace with hash 2026814461, now seen corresponding path program 1 times [2024-10-24 19:20:20,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:20:20,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [890129891] [2024-10-24 19:20:20,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:20:20,555 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:20:20,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:20:20,556 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:20:20,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2024-10-24 19:20:20,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:20:20,624 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-24 19:20:20,625 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:20:20,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:20:20,677 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:20:20,678 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:20:20,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [890129891] [2024-10-24 19:20:20,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [890129891] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:20:20,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:20:20,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:20:20,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246401842] [2024-10-24 19:20:20,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:20:20,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:20:20,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:20:20,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:20:20,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:20:20,699 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 73 [2024-10-24 19:20:20,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 98 transitions, 456 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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) [2024-10-24 19:20:20,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:20:20,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 73 [2024-10-24 19:20:20,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:20:21,777 INFO L124 PetriNetUnfolderBase]: 6031/9641 cut-off events. [2024-10-24 19:20:21,778 INFO L125 PetriNetUnfolderBase]: For 141/141 co-relation queries the response was YES. [2024-10-24 19:20:21,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18265 conditions, 9641 events. 6031/9641 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 681. Compared 65914 event pairs, 5423 based on Foata normal form. 140/6093 useless extension candidates. Maximal degree in co-relation 18123. Up to 7920 conditions per place. [2024-10-24 19:20:21,869 INFO L140 encePairwiseOnDemand]: 61/73 looper letters, 128 selfloop transitions, 3 changer transitions 1/145 dead transitions. [2024-10-24 19:20:21,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 145 transitions, 965 flow [2024-10-24 19:20:21,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 19:20:21,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 19:20:21,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 164 transitions. [2024-10-24 19:20:21,873 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5616438356164384 [2024-10-24 19:20:21,873 INFO L175 Difference]: Start difference. First operand has 78 places, 98 transitions, 456 flow. Second operand 4 states and 164 transitions. [2024-10-24 19:20:21,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 145 transitions, 965 flow [2024-10-24 19:20:21,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 145 transitions, 809 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-10-24 19:20:21,880 INFO L231 Difference]: Finished difference. Result has 78 places, 98 transitions, 386 flow [2024-10-24 19:20:21,881 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=386, PETRI_PLACES=78, PETRI_TRANSITIONS=98} [2024-10-24 19:20:21,882 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 7 predicate places. [2024-10-24 19:20:21,882 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 98 transitions, 386 flow [2024-10-24 19:20:21,883 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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) [2024-10-24 19:20:21,883 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:20:21,883 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:20:21,890 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2024-10-24 19:20:22,086 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:20:22,086 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-24 19:20:22,087 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:20:22,087 INFO L85 PathProgramCache]: Analyzing trace with hash -939286532, now seen corresponding path program 1 times [2024-10-24 19:20:22,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:20:22,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [193540182] [2024-10-24 19:20:22,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:20:22,088 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:20:22,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:20:22,093 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:20:22,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2024-10-24 19:20:22,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:20:22,179 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 19:20:22,181 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:20:22,185 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 [2024-10-24 19:20:22,222 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-10-24 19:20:22,223 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 [2024-10-24 19:20:22,248 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-10-24 19:20:22,248 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 14 treesize of output 20 [2024-10-24 19:20:22,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:20:22,282 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:20:22,282 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:20:22,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [193540182] [2024-10-24 19:20:22,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [193540182] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:20:22,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:20:22,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 19:20:22,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567339153] [2024-10-24 19:20:22,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:20:22,283 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 19:20:22,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:20:22,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 19:20:22,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-24 19:20:22,323 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2024-10-24 19:20:22,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 98 transitions, 386 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 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) [2024-10-24 19:20:22,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:20:22,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2024-10-24 19:20:22,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:20:22,893 INFO L124 PetriNetUnfolderBase]: 4605/7366 cut-off events. [2024-10-24 19:20:22,893 INFO L125 PetriNetUnfolderBase]: For 604/604 co-relation queries the response was YES. [2024-10-24 19:20:22,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15056 conditions, 7366 events. 4605/7366 cut-off events. For 604/604 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 47637 event pairs, 4099 based on Foata normal form. 0/4814 useless extension candidates. Maximal degree in co-relation 14934. Up to 6262 conditions per place. [2024-10-24 19:20:22,949 INFO L140 encePairwiseOnDemand]: 67/73 looper letters, 71 selfloop transitions, 11 changer transitions 0/95 dead transitions. [2024-10-24 19:20:22,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 95 transitions, 538 flow [2024-10-24 19:20:22,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 19:20:22,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 19:20:22,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2024-10-24 19:20:22,951 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36712328767123287 [2024-10-24 19:20:22,951 INFO L175 Difference]: Start difference. First operand has 78 places, 98 transitions, 386 flow. Second operand 5 states and 134 transitions. [2024-10-24 19:20:22,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 95 transitions, 538 flow [2024-10-24 19:20:22,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 95 transitions, 534 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-24 19:20:22,954 INFO L231 Difference]: Finished difference. Result has 78 places, 95 transitions, 392 flow [2024-10-24 19:20:22,954 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=392, PETRI_PLACES=78, PETRI_TRANSITIONS=95} [2024-10-24 19:20:22,955 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 7 predicate places. [2024-10-24 19:20:22,955 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 95 transitions, 392 flow [2024-10-24 19:20:22,955 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 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) [2024-10-24 19:20:22,955 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:20:22,956 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:20:22,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2024-10-24 19:20:23,158 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:20:23,159 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-24 19:20:23,160 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:20:23,160 INFO L85 PathProgramCache]: Analyzing trace with hash -939286531, now seen corresponding path program 1 times [2024-10-24 19:20:23,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:20:23,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1610341926] [2024-10-24 19:20:23,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:20:23,160 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:20:23,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:20:23,163 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:20:23,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2024-10-24 19:20:23,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:20:23,245 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-24 19:20:23,247 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:20:23,256 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 [2024-10-24 19:20:23,272 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 8 treesize of output 7 [2024-10-24 19:20:23,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:20:23,406 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 16 treesize of output 11 [2024-10-24 19:20:23,426 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-10-24 19:20:23,427 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 [2024-10-24 19:20:23,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:20:23,471 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 16 treesize of output 11 [2024-10-24 19:20:23,484 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-24 19:20:23,484 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 [2024-10-24 19:20:23,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:20:23,543 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:20:25,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:20:25,205 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:20:25,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1610341926] [2024-10-24 19:20:25,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1610341926] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:20:25,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:20:25,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-10-24 19:20:25,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491828911] [2024-10-24 19:20:25,206 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:20:25,206 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-24 19:20:25,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:20:25,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-24 19:20:25,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-10-24 19:20:25,675 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 73 [2024-10-24 19:20:25,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 95 transitions, 392 flow. Second operand has 12 states, 12 states have (on average 15.5) internal successors, (186), 12 states have internal predecessors, (186), 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) [2024-10-24 19:20:25,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:20:25,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 73 [2024-10-24 19:20:25,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:20:40,469 INFO L124 PetriNetUnfolderBase]: 10903/17450 cut-off events. [2024-10-24 19:20:40,469 INFO L125 PetriNetUnfolderBase]: For 1684/1684 co-relation queries the response was YES. [2024-10-24 19:20:40,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34969 conditions, 17450 events. 10903/17450 cut-off events. For 1684/1684 co-relation queries the response was YES. Maximal size of possible extension queue 773. Compared 124455 event pairs, 9651 based on Foata normal form. 0/11923 useless extension candidates. Maximal degree in co-relation 33778. Up to 5963 conditions per place. [2024-10-24 19:20:40,554 INFO L140 encePairwiseOnDemand]: 60/73 looper letters, 141 selfloop transitions, 79 changer transitions 0/230 dead transitions. [2024-10-24 19:20:40,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 230 transitions, 1367 flow [2024-10-24 19:20:40,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-24 19:20:40,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-24 19:20:40,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 359 transitions. [2024-10-24 19:20:40,556 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3512720156555773 [2024-10-24 19:20:40,557 INFO L175 Difference]: Start difference. First operand has 78 places, 95 transitions, 392 flow. Second operand 14 states and 359 transitions. [2024-10-24 19:20:40,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 230 transitions, 1367 flow [2024-10-24 19:20:40,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 230 transitions, 1340 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-24 19:20:40,562 INFO L231 Difference]: Finished difference. Result has 95 places, 145 transitions, 942 flow [2024-10-24 19:20:40,562 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=942, PETRI_PLACES=95, PETRI_TRANSITIONS=145} [2024-10-24 19:20:40,562 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 24 predicate places. [2024-10-24 19:20:40,563 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 145 transitions, 942 flow [2024-10-24 19:20:40,563 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 15.5) internal successors, (186), 12 states have internal predecessors, (186), 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) [2024-10-24 19:20:40,563 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:20:40,563 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:20:40,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2024-10-24 19:20:40,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:20:40,766 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-24 19:20:40,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:20:40,767 INFO L85 PathProgramCache]: Analyzing trace with hash 946889591, now seen corresponding path program 1 times [2024-10-24 19:20:40,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:20:40,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1513564759] [2024-10-24 19:20:40,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:20:40,767 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:20:40,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:20:40,768 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:20:40,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2024-10-24 19:20:40,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:20:40,834 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-24 19:20:40,835 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:20:40,841 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 [2024-10-24 19:20:40,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:20:40,872 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:20:40,872 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:20:40,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1513564759] [2024-10-24 19:20:40,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1513564759] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:20:40,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:20:40,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 19:20:40,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938155184] [2024-10-24 19:20:40,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:20:40,873 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:20:40,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:20:40,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:20:40,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:20:40,919 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2024-10-24 19:20:40,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 145 transitions, 942 flow. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 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) [2024-10-24 19:20:40,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:20:40,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2024-10-24 19:20:40,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:20:42,233 INFO L124 PetriNetUnfolderBase]: 8817/14151 cut-off events. [2024-10-24 19:20:42,233 INFO L125 PetriNetUnfolderBase]: For 4127/4127 co-relation queries the response was YES. [2024-10-24 19:20:42,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29699 conditions, 14151 events. 8817/14151 cut-off events. For 4127/4127 co-relation queries the response was YES. Maximal size of possible extension queue 710. Compared 99806 event pairs, 7743 based on Foata normal form. 0/10605 useless extension candidates. Maximal degree in co-relation 29508. Up to 11993 conditions per place. [2024-10-24 19:20:42,310 INFO L140 encePairwiseOnDemand]: 69/73 looper letters, 122 selfloop transitions, 8 changer transitions 0/143 dead transitions. [2024-10-24 19:20:42,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 143 transitions, 1198 flow [2024-10-24 19:20:42,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 19:20:42,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 19:20:42,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2024-10-24 19:20:42,311 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3904109589041096 [2024-10-24 19:20:42,311 INFO L175 Difference]: Start difference. First operand has 95 places, 145 transitions, 942 flow. Second operand 4 states and 114 transitions. [2024-10-24 19:20:42,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 143 transitions, 1198 flow [2024-10-24 19:20:42,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 143 transitions, 1193 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-24 19:20:42,328 INFO L231 Difference]: Finished difference. Result has 95 places, 143 transitions, 949 flow [2024-10-24 19:20:42,328 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=933, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=949, PETRI_PLACES=95, PETRI_TRANSITIONS=143} [2024-10-24 19:20:42,329 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 24 predicate places. [2024-10-24 19:20:42,329 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 143 transitions, 949 flow [2024-10-24 19:20:42,329 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 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) [2024-10-24 19:20:42,329 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:20:42,330 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-10-24 19:20:42,334 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2024-10-24 19:20:42,530 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:20:42,531 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-24 19:20:42,531 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:20:42,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1366153605, now seen corresponding path program 2 times [2024-10-24 19:20:42,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:20:42,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [323952986] [2024-10-24 19:20:42,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 19:20:42,532 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:20:42,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:20:42,533 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:20:42,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2024-10-24 19:20:42,594 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 19:20:42,594 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:20:42,596 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-24 19:20:42,597 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:20:42,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-24 19:20:42,872 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:20:42,873 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:20:43,609 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:20:43,610 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:20:43,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [323952986] [2024-10-24 19:20:43,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [323952986] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:20:43,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:20:43,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-10-24 19:20:43,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425374463] [2024-10-24 19:20:43,611 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:20:43,611 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-24 19:20:43,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:20:43,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-24 19:20:43,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-24 19:20:44,241 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2024-10-24 19:20:44,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 143 transitions, 949 flow. Second operand has 14 states, 14 states have (on average 18.571428571428573) internal successors, (260), 14 states have internal predecessors, (260), 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) [2024-10-24 19:20:44,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:20:44,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2024-10-24 19:20:44,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:20:50,993 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-24 19:20:53,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-24 19:20:57,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-24 19:20:58,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-24 19:21:01,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-24 19:21:03,550 INFO L124 PetriNetUnfolderBase]: 8871/14313 cut-off events. [2024-10-24 19:21:03,550 INFO L125 PetriNetUnfolderBase]: For 4465/4465 co-relation queries the response was YES. [2024-10-24 19:21:03,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30574 conditions, 14313 events. 8871/14313 cut-off events. For 4465/4465 co-relation queries the response was YES. Maximal size of possible extension queue 719. Compared 101776 event pairs, 7743 based on Foata normal form. 54/10821 useless extension candidates. Maximal degree in co-relation 30175. Up to 12054 conditions per place. [2024-10-24 19:21:03,656 INFO L140 encePairwiseOnDemand]: 60/73 looper letters, 55 selfloop transitions, 186 changer transitions 0/251 dead transitions. [2024-10-24 19:21:03,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 251 transitions, 2319 flow [2024-10-24 19:21:03,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-24 19:21:03,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-24 19:21:03,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 529 transitions. [2024-10-24 19:21:03,658 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32938978829389787 [2024-10-24 19:21:03,659 INFO L175 Difference]: Start difference. First operand has 95 places, 143 transitions, 949 flow. Second operand 22 states and 529 transitions. [2024-10-24 19:21:03,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 251 transitions, 2319 flow [2024-10-24 19:21:03,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 251 transitions, 2304 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 19:21:03,678 INFO L231 Difference]: Finished difference. Result has 120 places, 251 transitions, 2344 flow [2024-10-24 19:21:03,679 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=940, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2344, PETRI_PLACES=120, PETRI_TRANSITIONS=251} [2024-10-24 19:21:03,679 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 49 predicate places. [2024-10-24 19:21:03,680 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 251 transitions, 2344 flow [2024-10-24 19:21:03,680 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 18.571428571428573) internal successors, (260), 14 states have internal predecessors, (260), 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) [2024-10-24 19:21:03,680 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:21:03,680 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:21:03,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2024-10-24 19:21:03,880 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:21:03,881 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-24 19:21:03,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:21:03,881 INFO L85 PathProgramCache]: Analyzing trace with hash 946889592, now seen corresponding path program 1 times [2024-10-24 19:21:03,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:21:03,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1267351366] [2024-10-24 19:21:03,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:21:03,882 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:21:03,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:21:03,886 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:21:03,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2024-10-24 19:21:03,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:21:03,947 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-24 19:21:03,948 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:21:03,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:21:03,967 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:21:03,967 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:21:03,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1267351366] [2024-10-24 19:21:03,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1267351366] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:21:03,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:21:03,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:21:03,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033189649] [2024-10-24 19:21:03,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:21:03,968 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:21:03,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:21:03,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:21:03,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:21:03,969 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 73 [2024-10-24 19:21:03,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 251 transitions, 2344 flow. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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) [2024-10-24 19:21:03,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:21:03,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 73 [2024-10-24 19:21:03,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:21:05,674 INFO L124 PetriNetUnfolderBase]: 11078/18180 cut-off events. [2024-10-24 19:21:05,674 INFO L125 PetriNetUnfolderBase]: For 6229/6229 co-relation queries the response was YES. [2024-10-24 19:21:05,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39455 conditions, 18180 events. 11078/18180 cut-off events. For 6229/6229 co-relation queries the response was YES. Maximal size of possible extension queue 804. Compared 136474 event pairs, 4991 based on Foata normal form. 314/13846 useless extension candidates. Maximal degree in co-relation 39043. Up to 8698 conditions per place. [2024-10-24 19:21:05,836 INFO L140 encePairwiseOnDemand]: 69/73 looper letters, 258 selfloop transitions, 2 changer transitions 0/273 dead transitions. [2024-10-24 19:21:05,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 273 transitions, 2934 flow [2024-10-24 19:21:05,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:21:05,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:21:05,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 128 transitions. [2024-10-24 19:21:05,839 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5844748858447488 [2024-10-24 19:21:05,839 INFO L175 Difference]: Start difference. First operand has 120 places, 251 transitions, 2344 flow. Second operand 3 states and 128 transitions. [2024-10-24 19:21:05,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 273 transitions, 2934 flow [2024-10-24 19:21:05,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 273 transitions, 2448 flow, removed 147 selfloop flow, removed 9 redundant places. [2024-10-24 19:21:05,874 INFO L231 Difference]: Finished difference. Result has 114 places, 252 transitions, 1872 flow [2024-10-24 19:21:05,875 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=1858, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1872, PETRI_PLACES=114, PETRI_TRANSITIONS=252} [2024-10-24 19:21:05,875 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 43 predicate places. [2024-10-24 19:21:05,875 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 252 transitions, 1872 flow [2024-10-24 19:21:05,876 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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) [2024-10-24 19:21:05,876 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:21:05,876 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:21:05,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2024-10-24 19:21:06,076 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:21:06,076 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-24 19:21:06,077 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:21:06,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1170527223, now seen corresponding path program 1 times [2024-10-24 19:21:06,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:21:06,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1916608357] [2024-10-24 19:21:06,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:21:06,077 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:21:06,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:21:06,078 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:21:06,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2024-10-24 19:21:06,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:21:06,135 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-24 19:21:06,136 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:21:06,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:21:06,154 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:21:06,154 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:21:06,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1916608357] [2024-10-24 19:21:06,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1916608357] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:21:06,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:21:06,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:21:06,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969720676] [2024-10-24 19:21:06,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:21:06,155 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:21:06,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:21:06,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:21:06,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:21:06,155 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 73 [2024-10-24 19:21:06,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 252 transitions, 1872 flow. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2024-10-24 19:21:06,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:21:06,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 73 [2024-10-24 19:21:06,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:21:07,676 INFO L124 PetriNetUnfolderBase]: 9496/15470 cut-off events. [2024-10-24 19:21:07,677 INFO L125 PetriNetUnfolderBase]: For 6508/6508 co-relation queries the response was YES. [2024-10-24 19:21:07,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35669 conditions, 15470 events. 9496/15470 cut-off events. For 6508/6508 co-relation queries the response was YES. Maximal size of possible extension queue 746. Compared 112851 event pairs, 3758 based on Foata normal form. 224/12103 useless extension candidates. Maximal degree in co-relation 35310. Up to 11621 conditions per place. [2024-10-24 19:21:07,778 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 254 selfloop transitions, 2 changer transitions 0/269 dead transitions. [2024-10-24 19:21:07,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 269 transitions, 2444 flow [2024-10-24 19:21:07,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:21:07,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:21:07,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 124 transitions. [2024-10-24 19:21:07,779 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5662100456621004 [2024-10-24 19:21:07,779 INFO L175 Difference]: Start difference. First operand has 114 places, 252 transitions, 1872 flow. Second operand 3 states and 124 transitions. [2024-10-24 19:21:07,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 269 transitions, 2444 flow [2024-10-24 19:21:07,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 269 transitions, 2442 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 19:21:07,806 INFO L231 Difference]: Finished difference. Result has 116 places, 253 transitions, 1886 flow [2024-10-24 19:21:07,807 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=1870, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1886, PETRI_PLACES=116, PETRI_TRANSITIONS=253} [2024-10-24 19:21:07,807 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 45 predicate places. [2024-10-24 19:21:07,807 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 253 transitions, 1886 flow [2024-10-24 19:21:07,808 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2024-10-24 19:21:07,808 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:21:07,808 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:21:07,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2024-10-24 19:21:08,008 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:21:08,009 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-24 19:21:08,009 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:21:08,009 INFO L85 PathProgramCache]: Analyzing trace with hash -2019946154, now seen corresponding path program 1 times [2024-10-24 19:21:08,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:21:08,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [612560803] [2024-10-24 19:21:08,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:21:08,010 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:21:08,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:21:08,011 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:21:08,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2024-10-24 19:21:08,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:21:08,077 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-24 19:21:08,078 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:21:08,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:21:08,101 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:21:08,101 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:21:08,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [612560803] [2024-10-24 19:21:08,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [612560803] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:21:08,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:21:08,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 19:21:08,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093023680] [2024-10-24 19:21:08,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:21:08,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:21:08,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:21:08,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:21:08,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:21:08,102 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 73 [2024-10-24 19:21:08,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 253 transitions, 1886 flow. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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) [2024-10-24 19:21:08,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:21:08,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 73 [2024-10-24 19:21:08,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:21:09,337 INFO L124 PetriNetUnfolderBase]: 6170/10254 cut-off events. [2024-10-24 19:21:09,337 INFO L125 PetriNetUnfolderBase]: For 4196/4196 co-relation queries the response was YES. [2024-10-24 19:21:09,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25280 conditions, 10254 events. 6170/10254 cut-off events. For 4196/4196 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 71421 event pairs, 3360 based on Foata normal form. 82/8406 useless extension candidates. Maximal degree in co-relation 24920. Up to 8579 conditions per place. [2024-10-24 19:21:09,426 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 249 selfloop transitions, 3 changer transitions 0/265 dead transitions. [2024-10-24 19:21:09,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 265 transitions, 2432 flow [2024-10-24 19:21:09,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:21:09,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:21:09,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 118 transitions. [2024-10-24 19:21:09,427 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5388127853881278 [2024-10-24 19:21:09,427 INFO L175 Difference]: Start difference. First operand has 116 places, 253 transitions, 1886 flow. Second operand 3 states and 118 transitions. [2024-10-24 19:21:09,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 265 transitions, 2432 flow [2024-10-24 19:21:09,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 265 transitions, 2430 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 19:21:09,448 INFO L231 Difference]: Finished difference. Result has 118 places, 255 transitions, 1909 flow [2024-10-24 19:21:09,448 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=1884, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1909, PETRI_PLACES=118, PETRI_TRANSITIONS=255} [2024-10-24 19:21:09,449 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 47 predicate places. [2024-10-24 19:21:09,449 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 255 transitions, 1909 flow [2024-10-24 19:21:09,449 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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) [2024-10-24 19:21:09,449 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:21:09,449 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:21:09,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2024-10-24 19:21:09,649 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:21:09,650 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-24 19:21:09,650 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:21:09,650 INFO L85 PathProgramCache]: Analyzing trace with hash 800585082, now seen corresponding path program 2 times [2024-10-24 19:21:09,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:21:09,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1897507772] [2024-10-24 19:21:09,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 19:21:09,651 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:21:09,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:21:09,653 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:21:09,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2024-10-24 19:21:09,737 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-24 19:21:09,737 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:21:09,738 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-24 19:21:09,740 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:21:09,753 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 [2024-10-24 19:21:09,760 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 8 treesize of output 7 [2024-10-24 19:21:09,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:21:09,904 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 16 treesize of output 11 [2024-10-24 19:21:09,929 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-10-24 19:21:09,930 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 [2024-10-24 19:21:09,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:21:09,962 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 16 treesize of output 11 [2024-10-24 19:21:09,975 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-24 19:21:09,975 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 [2024-10-24 19:21:10,023 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-24 19:21:10,023 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:21:10,023 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:21:10,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1897507772] [2024-10-24 19:21:10,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1897507772] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:21:10,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:21:10,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 19:21:10,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922676582] [2024-10-24 19:21:10,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:21:10,023 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 19:21:10,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:21:10,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 19:21:10,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-24 19:21:10,060 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2024-10-24 19:21:10,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 255 transitions, 1909 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 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) [2024-10-24 19:21:10,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:21:10,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2024-10-24 19:21:10,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:21:11,102 INFO L124 PetriNetUnfolderBase]: 5435/9167 cut-off events. [2024-10-24 19:21:11,102 INFO L125 PetriNetUnfolderBase]: For 6017/6017 co-relation queries the response was YES. [2024-10-24 19:21:11,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22718 conditions, 9167 events. 5435/9167 cut-off events. For 6017/6017 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 63320 event pairs, 4337 based on Foata normal form. 284/7654 useless extension candidates. Maximal degree in co-relation 22357. Up to 8212 conditions per place. [2024-10-24 19:21:11,174 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 227 selfloop transitions, 12 changer transitions 0/252 dead transitions. [2024-10-24 19:21:11,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 252 transitions, 2361 flow [2024-10-24 19:21:11,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 19:21:11,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 19:21:11,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 112 transitions. [2024-10-24 19:21:11,176 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3835616438356164 [2024-10-24 19:21:11,176 INFO L175 Difference]: Start difference. First operand has 118 places, 255 transitions, 1909 flow. Second operand 4 states and 112 transitions. [2024-10-24 19:21:11,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 252 transitions, 2361 flow [2024-10-24 19:21:11,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 252 transitions, 2352 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-10-24 19:21:11,189 INFO L231 Difference]: Finished difference. Result has 117 places, 252 transitions, 1898 flow [2024-10-24 19:21:11,189 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=1874, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1898, PETRI_PLACES=117, PETRI_TRANSITIONS=252} [2024-10-24 19:21:11,189 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 46 predicate places. [2024-10-24 19:21:11,189 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 252 transitions, 1898 flow [2024-10-24 19:21:11,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 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) [2024-10-24 19:21:11,190 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:21:11,190 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:21:11,193 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2024-10-24 19:21:11,390 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:21:11,390 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-24 19:21:11,390 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:21:11,391 INFO L85 PathProgramCache]: Analyzing trace with hash 539670674, now seen corresponding path program 1 times [2024-10-24 19:21:11,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:21:11,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2001911900] [2024-10-24 19:21:11,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:21:11,391 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:21:11,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:21:11,392 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:21:11,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2024-10-24 19:21:11,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:21:11,480 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-24 19:21:11,481 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:21:11,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:21:11,539 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:21:11,540 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:21:11,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2001911900] [2024-10-24 19:21:11,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2001911900] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:21:11,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:21:11,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 19:21:11,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937655458] [2024-10-24 19:21:11,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:21:11,540 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:21:11,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:21:11,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:21:11,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:21:11,556 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 73 [2024-10-24 19:21:11,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 252 transitions, 1898 flow. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 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) [2024-10-24 19:21:11,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:21:11,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 73 [2024-10-24 19:21:11,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:21:12,678 INFO L124 PetriNetUnfolderBase]: 5936/10234 cut-off events. [2024-10-24 19:21:12,678 INFO L125 PetriNetUnfolderBase]: For 2814/2814 co-relation queries the response was YES. [2024-10-24 19:21:12,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24619 conditions, 10234 events. 5936/10234 cut-off events. For 2814/2814 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 71611 event pairs, 4798 based on Foata normal form. 120/8557 useless extension candidates. Maximal degree in co-relation 24107. Up to 8217 conditions per place. [2024-10-24 19:21:12,753 INFO L140 encePairwiseOnDemand]: 67/73 looper letters, 288 selfloop transitions, 17 changer transitions 28/346 dead transitions. [2024-10-24 19:21:12,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 346 transitions, 3271 flow [2024-10-24 19:21:12,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 19:21:12,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 19:21:12,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 145 transitions. [2024-10-24 19:21:12,754 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4965753424657534 [2024-10-24 19:21:12,754 INFO L175 Difference]: Start difference. First operand has 117 places, 252 transitions, 1898 flow. Second operand 4 states and 145 transitions. [2024-10-24 19:21:12,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 346 transitions, 3271 flow [2024-10-24 19:21:12,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 346 transitions, 3258 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 19:21:12,767 INFO L231 Difference]: Finished difference. Result has 119 places, 252 transitions, 1927 flow [2024-10-24 19:21:12,768 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=1885, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1927, PETRI_PLACES=119, PETRI_TRANSITIONS=252} [2024-10-24 19:21:12,768 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 48 predicate places. [2024-10-24 19:21:12,768 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 252 transitions, 1927 flow [2024-10-24 19:21:12,768 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 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) [2024-10-24 19:21:12,768 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:21:12,768 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:21:12,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2024-10-24 19:21:12,969 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:21:12,969 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-24 19:21:12,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:21:12,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1589521504, now seen corresponding path program 1 times [2024-10-24 19:21:12,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:21:12,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [232323549] [2024-10-24 19:21:12,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:21:12,970 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:21:12,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:21:12,971 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:21:12,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2024-10-24 19:21:13,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:21:13,088 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-24 19:21:13,090 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:21:13,093 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 [2024-10-24 19:21:13,121 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-10-24 19:21:13,121 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 14 treesize of output 20 [2024-10-24 19:21:13,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 19:21:13,188 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:21:13,188 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:21:13,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [232323549] [2024-10-24 19:21:13,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [232323549] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:21:13,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:21:13,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 19:21:13,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321657462] [2024-10-24 19:21:13,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:21:13,188 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:21:13,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:21:13,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:21:13,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:21:13,219 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2024-10-24 19:21:13,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 252 transitions, 1927 flow. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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) [2024-10-24 19:21:13,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:21:13,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2024-10-24 19:21:13,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:21:14,034 INFO L124 PetriNetUnfolderBase]: 4325/7759 cut-off events. [2024-10-24 19:21:14,034 INFO L125 PetriNetUnfolderBase]: For 2829/2829 co-relation queries the response was YES. [2024-10-24 19:21:14,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19352 conditions, 7759 events. 4325/7759 cut-off events. For 2829/2829 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 53913 event pairs, 3418 based on Foata normal form. 0/6979 useless extension candidates. Maximal degree in co-relation 18838. Up to 6497 conditions per place. [2024-10-24 19:21:14,080 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 200 selfloop transitions, 37 changer transitions 0/250 dead transitions. [2024-10-24 19:21:14,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 250 transitions, 2393 flow [2024-10-24 19:21:14,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 19:21:14,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 19:21:14,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-10-24 19:21:14,082 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3452054794520548 [2024-10-24 19:21:14,082 INFO L175 Difference]: Start difference. First operand has 119 places, 252 transitions, 1927 flow. Second operand 5 states and 126 transitions. [2024-10-24 19:21:14,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 250 transitions, 2393 flow [2024-10-24 19:21:14,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 250 transitions, 2376 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-24 19:21:14,095 INFO L231 Difference]: Finished difference. Result has 120 places, 250 transitions, 1976 flow [2024-10-24 19:21:14,095 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=1902, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1976, PETRI_PLACES=120, PETRI_TRANSITIONS=250} [2024-10-24 19:21:14,096 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 49 predicate places. [2024-10-24 19:21:14,096 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 250 transitions, 1976 flow [2024-10-24 19:21:14,096 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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) [2024-10-24 19:21:14,096 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:21:14,096 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:21:14,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2024-10-24 19:21:14,296 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:21:14,296 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-24 19:21:14,297 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:21:14,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1589521503, now seen corresponding path program 1 times [2024-10-24 19:21:14,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:21:14,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [16083140] [2024-10-24 19:21:14,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:21:14,297 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:21:14,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:21:14,299 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:21:14,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2024-10-24 19:21:14,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:21:14,421 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-24 19:21:14,423 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:21:14,434 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 8 treesize of output 7 [2024-10-24 19:21:14,442 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 [2024-10-24 19:21:14,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:21:14,565 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 16 treesize of output 11 [2024-10-24 19:21:14,585 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-24 19:21:14,585 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 [2024-10-24 19:21:14,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:21:14,700 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:21:15,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:21:15,670 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:21:15,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [16083140] [2024-10-24 19:21:15,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [16083140] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:21:15,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:21:15,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2024-10-24 19:21:15,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744102576] [2024-10-24 19:21:15,670 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:21:15,671 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-24 19:21:15,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:21:15,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-24 19:21:15,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-10-24 19:21:16,622 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 73 [2024-10-24 19:21:16,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 250 transitions, 1976 flow. Second operand has 10 states, 10 states have (on average 16.9) internal successors, (169), 10 states have internal predecessors, (169), 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) [2024-10-24 19:21:16,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:21:16,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 73 [2024-10-24 19:21:16,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:21:22,651 INFO L124 PetriNetUnfolderBase]: 9239/16643 cut-off events. [2024-10-24 19:21:22,651 INFO L125 PetriNetUnfolderBase]: For 6344/6344 co-relation queries the response was YES. [2024-10-24 19:21:22,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40429 conditions, 16643 events. 9239/16643 cut-off events. For 6344/6344 co-relation queries the response was YES. Maximal size of possible extension queue 701. Compared 132054 event pairs, 7124 based on Foata normal form. 684/15875 useless extension candidates. Maximal degree in co-relation 39574. Up to 5743 conditions per place. [2024-10-24 19:21:22,746 INFO L140 encePairwiseOnDemand]: 62/73 looper letters, 168 selfloop transitions, 303 changer transitions 4/485 dead transitions. [2024-10-24 19:21:22,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 485 transitions, 4667 flow [2024-10-24 19:21:22,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-24 19:21:22,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-24 19:21:22,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 325 transitions. [2024-10-24 19:21:22,749 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.31800391389432486 [2024-10-24 19:21:22,749 INFO L175 Difference]: Start difference. First operand has 120 places, 250 transitions, 1976 flow. Second operand 14 states and 325 transitions. [2024-10-24 19:21:22,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 485 transitions, 4667 flow [2024-10-24 19:21:22,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 485 transitions, 4519 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-24 19:21:22,768 INFO L231 Difference]: Finished difference. Result has 136 places, 392 transitions, 4166 flow [2024-10-24 19:21:22,769 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=1873, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4166, PETRI_PLACES=136, PETRI_TRANSITIONS=392} [2024-10-24 19:21:22,769 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 65 predicate places. [2024-10-24 19:21:22,769 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 392 transitions, 4166 flow [2024-10-24 19:21:22,769 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 16.9) internal successors, (169), 10 states have internal predecessors, (169), 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) [2024-10-24 19:21:22,769 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:21:22,769 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1] [2024-10-24 19:21:22,774 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2024-10-24 19:21:22,970 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:21:22,970 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-24 19:21:22,971 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:21:22,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1561778293, now seen corresponding path program 3 times [2024-10-24 19:21:22,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:21:22,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [853774801] [2024-10-24 19:21:22,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 19:21:22,971 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:21:22,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:21:22,972 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:21:22,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2024-10-24 19:21:23,155 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-10-24 19:21:23,155 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:21:23,159 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-24 19:21:23,160 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:21:23,168 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 8 treesize of output 7 [2024-10-24 19:21:23,637 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:21:23,637 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:21:26,105 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:21:26,105 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:21:26,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [853774801] [2024-10-24 19:21:26,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [853774801] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:21:26,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:21:26,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2024-10-24 19:21:26,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204242354] [2024-10-24 19:21:26,106 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:21:26,106 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-24 19:21:26,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:21:26,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-24 19:21:26,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2024-10-24 19:21:28,730 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2024-10-24 19:21:28,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 392 transitions, 4166 flow. Second operand has 26 states, 26 states have (on average 18.76923076923077) internal successors, (488), 26 states have internal predecessors, (488), 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) [2024-10-24 19:21:28,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:21:28,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2024-10-24 19:21:28,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:21:38,890 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-24 19:21:40,276 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-24 19:21:42,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-24 19:21:43,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []