./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/array-eq-symm.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/array-eq-symm.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 6897befed0dbbae24492a1e82d50fcd0be6b3857b241d882a904d02a513d7a6d --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 19:13:00,409 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 19:13:00,463 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-24 19:13:00,468 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 19:13:00,469 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 19:13:00,488 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 19:13:00,489 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 19:13:00,490 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 19:13:00,490 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 19:13:00,491 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 19:13:00,491 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 19:13:00,491 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 19:13:00,492 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 19:13:00,493 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 19:13:00,493 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 19:13:00,494 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 19:13:00,494 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 19:13:00,494 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 19:13:00,494 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 19:13:00,494 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 19:13:00,495 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-24 19:13:00,495 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-24 19:13:00,495 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-24 19:13:00,495 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 19:13:00,496 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-24 19:13:00,496 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 19:13:00,496 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-24 19:13:00,496 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 19:13:00,496 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 19:13:00,497 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 19:13:00,497 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 19:13:00,497 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 19:13:00,497 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 19:13:00,497 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:13:00,498 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 19:13:00,498 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 19:13:00,498 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 19:13:00,498 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 19:13:00,498 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 19:13:00,499 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 19:13:00,499 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 19:13:00,499 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 19:13:00,499 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6897befed0dbbae24492a1e82d50fcd0be6b3857b241d882a904d02a513d7a6d [2024-10-24 19:13:00,688 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 19:13:00,701 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 19:13:00,703 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 19:13:00,704 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 19:13:00,704 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 19:13:00,705 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2024-10-24 19:13:01,885 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 19:13:02,067 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 19:13:02,069 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2024-10-24 19:13:02,077 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38fde409e/11a713073c944152aa6be6e829c740b9/FLAGbe1845225 [2024-10-24 19:13:02,093 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38fde409e/11a713073c944152aa6be6e829c740b9 [2024-10-24 19:13:02,095 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 19:13:02,097 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 19:13:02,100 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 19:13:02,102 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 19:13:02,106 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 19:13:02,107 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:13:02" (1/1) ... [2024-10-24 19:13:02,107 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b3cbf48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:13:02, skipping insertion in model container [2024-10-24 19:13:02,109 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:13:02" (1/1) ... [2024-10-24 19:13:02,131 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 19:13:02,297 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:13:02,304 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 19:13:02,305 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@cc823a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:13:02, skipping insertion in model container [2024-10-24 19:13:02,305 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 19:13:02,305 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-10-24 19:13:02,318 INFO L158 Benchmark]: Toolchain (without parser) took 220.11ms. Allocated memory was 132.1MB in the beginning and 199.2MB in the end (delta: 67.1MB). Free memory was 61.6MB in the beginning and 171.7MB in the end (delta: -110.1MB). Peak memory consumption was 17.1MB. Max. memory is 16.1GB. [2024-10-24 19:13:02,319 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 132.1MB. Free memory is still 91.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-24 19:13:02,319 INFO L158 Benchmark]: CACSL2BoogieTranslator took 204.62ms. Allocated memory is still 132.1MB. Free memory was 61.3MB in the beginning and 50.4MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-10-24 19:13:02,320 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 132.1MB. Free memory is still 91.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 204.62ms. Allocated memory is still 132.1MB. Free memory was 61.3MB in the beginning and 50.4MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 94]: 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/array-eq-symm.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 6897befed0dbbae24492a1e82d50fcd0be6b3857b241d882a904d02a513d7a6d --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 19:13:03,902 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 19:13:03,954 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-10-24 19:13:03,957 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 19:13:03,958 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 19:13:03,982 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 19:13:03,984 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 19:13:03,984 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 19:13:03,985 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 19:13:03,987 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 19:13:03,988 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 19:13:03,988 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 19:13:03,988 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 19:13:03,988 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 19:13:03,990 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 19:13:03,991 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 19:13:03,991 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 19:13:03,991 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 19:13:03,991 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 19:13:03,991 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 19:13:03,992 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-24 19:13:03,992 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-24 19:13:03,992 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-24 19:13:03,992 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 19:13:03,992 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-24 19:13:03,992 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-24 19:13:03,993 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 19:13:03,993 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-24 19:13:03,993 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-24 19:13:03,993 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 19:13:03,994 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 19:13:03,994 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 19:13:03,995 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 19:13:03,995 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 19:13:03,995 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 19:13:03,995 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:13:03,995 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 19:13:03,995 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 19:13:03,995 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-24 19:13:03,996 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-10-24 19:13:03,996 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 19:13:03,996 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 19:13:03,997 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 19:13:03,997 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 19:13:03,997 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-24 19:13:03,997 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6897befed0dbbae24492a1e82d50fcd0be6b3857b241d882a904d02a513d7a6d [2024-10-24 19:13:04,229 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 19:13:04,244 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 19:13:04,246 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 19:13:04,247 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 19:13:04,248 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 19:13:04,248 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2024-10-24 19:13:05,479 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 19:13:05,616 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 19:13:05,617 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2024-10-24 19:13:05,626 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f94e8fe7/d9b5a812ac2b4339b76beaf24ec5a3b7/FLAGb9e5d6997 [2024-10-24 19:13:06,023 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f94e8fe7/d9b5a812ac2b4339b76beaf24ec5a3b7 [2024-10-24 19:13:06,027 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 19:13:06,028 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 19:13:06,028 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 19:13:06,029 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 19:13:06,032 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 19:13:06,033 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:13:06" (1/1) ... [2024-10-24 19:13:06,033 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2467ae0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:13:06, skipping insertion in model container [2024-10-24 19:13:06,035 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:13:06" (1/1) ... [2024-10-24 19:13:06,053 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 19:13:06,241 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:13:06,253 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-10-24 19:13:06,255 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 19:13:06,271 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:13:06,278 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 19:13:06,299 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:13:06,319 INFO L204 MainTranslator]: Completed translation [2024-10-24 19:13:06,320 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:13:06 WrapperNode [2024-10-24 19:13:06,320 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 19:13:06,321 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 19:13:06,321 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 19:13:06,321 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 19:13:06,326 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:13:06" (1/1) ... [2024-10-24 19:13:06,340 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:13:06" (1/1) ... [2024-10-24 19:13:06,364 INFO L138 Inliner]: procedures = 24, calls = 20, calls flagged for inlining = 8, calls inlined = 10, statements flattened = 103 [2024-10-24 19:13:06,365 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 19:13:06,366 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 19:13:06,366 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 19:13:06,367 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 19:13:06,374 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:13:06" (1/1) ... [2024-10-24 19:13:06,375 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:13:06" (1/1) ... [2024-10-24 19:13:06,377 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:13:06" (1/1) ... [2024-10-24 19:13:06,398 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-10-24 19:13:06,399 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:13:06" (1/1) ... [2024-10-24 19:13:06,399 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:13:06" (1/1) ... [2024-10-24 19:13:06,406 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:13:06" (1/1) ... [2024-10-24 19:13:06,412 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:13:06" (1/1) ... [2024-10-24 19:13:06,413 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:13:06" (1/1) ... [2024-10-24 19:13:06,418 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:13:06" (1/1) ... [2024-10-24 19:13:06,422 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 19:13:06,423 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 19:13:06,424 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 19:13:06,424 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 19:13:06,425 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:13:06" (1/1) ... [2024-10-24 19:13:06,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:13:06,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:13:06,454 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 19:13:06,461 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 19:13:06,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 19:13:06,494 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-24 19:13:06,494 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-24 19:13:06,494 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-24 19:13:06,494 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-24 19:13:06,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-24 19:13:06,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-10-24 19:13:06,495 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-24 19:13:06,495 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-10-24 19:13:06,495 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-10-24 19:13:06,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 19:13:06,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 19:13:06,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-10-24 19:13:06,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-10-24 19:13:06,496 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 19:13:06,615 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 19:13:06,617 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 19:13:06,924 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-24 19:13:06,924 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 19:13:07,100 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 19:13:07,100 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-24 19:13:07,101 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 07:13:07 BoogieIcfgContainer [2024-10-24 19:13:07,101 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 19:13:07,104 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 19:13:07,104 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 19:13:07,106 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 19:13:07,107 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 07:13:06" (1/3) ... [2024-10-24 19:13:07,107 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3208df22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 07:13:07, skipping insertion in model container [2024-10-24 19:13:07,107 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:13:06" (2/3) ... [2024-10-24 19:13:07,108 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3208df22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 07:13:07, skipping insertion in model container [2024-10-24 19:13:07,108 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 07:13:07" (3/3) ... [2024-10-24 19:13:07,109 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.c [2024-10-24 19:13:07,120 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 19:13:07,121 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2024-10-24 19:13:07,121 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-24 19:13:07,165 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-24 19:13:07,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 48 transitions, 110 flow [2024-10-24 19:13:07,216 INFO L124 PetriNetUnfolderBase]: 6/46 cut-off events. [2024-10-24 19:13:07,216 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-24 19:13:07,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 46 events. 6/46 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 103 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 29. Up to 2 conditions per place. [2024-10-24 19:13:07,220 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 48 transitions, 110 flow [2024-10-24 19:13:07,222 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 46 places, 45 transitions, 102 flow [2024-10-24 19:13:07,236 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 19:13:07,243 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;@7e7d48ff, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 19:13:07,243 INFO L334 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2024-10-24 19:13:07,247 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 19:13:07,247 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-24 19:13:07,247 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 19:13:07,247 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:13:07,248 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-24 19:13:07,248 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-24 19:13:07,252 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:13:07,252 INFO L85 PathProgramCache]: Analyzing trace with hash 459561, now seen corresponding path program 1 times [2024-10-24 19:13:07,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:13:07,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1792758182] [2024-10-24 19:13:07,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:13:07,261 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 19:13:07,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:13:07,262 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 19:13:07,264 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 19:13:07,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:13:07,325 INFO L255 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-24 19:13:07,328 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:13:07,371 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 19:13:07,382 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 19:13:07,382 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:13:07,383 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:13:07,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1792758182] [2024-10-24 19:13:07,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1792758182] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:13:07,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:13:07,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-24 19:13:07,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800418135] [2024-10-24 19:13:07,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:13:07,391 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:13:07,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:13:07,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:13:07,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:13:07,456 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2024-10-24 19:13:07,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 45 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 19:13:07,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:13:07,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2024-10-24 19:13:07,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:13:07,564 INFO L124 PetriNetUnfolderBase]: 101/218 cut-off events. [2024-10-24 19:13:07,564 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-10-24 19:13:07,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 385 conditions, 218 events. 101/218 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 810 event pairs, 35 based on Foata normal form. 1/130 useless extension candidates. Maximal degree in co-relation 329. Up to 143 conditions per place. [2024-10-24 19:13:07,569 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 20 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2024-10-24 19:13:07,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 41 transitions, 138 flow [2024-10-24 19:13:07,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:13:07,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:13:07,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 91 transitions. [2024-10-24 19:13:07,578 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6319444444444444 [2024-10-24 19:13:07,579 INFO L175 Difference]: Start difference. First operand has 46 places, 45 transitions, 102 flow. Second operand 3 states and 91 transitions. [2024-10-24 19:13:07,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 41 transitions, 138 flow [2024-10-24 19:13:07,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 130 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-24 19:13:07,588 INFO L231 Difference]: Finished difference. Result has 40 places, 41 transitions, 90 flow [2024-10-24 19:13:07,590 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=40, PETRI_TRANSITIONS=41} [2024-10-24 19:13:07,594 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, -6 predicate places. [2024-10-24 19:13:07,596 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 41 transitions, 90 flow [2024-10-24 19:13:07,596 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 19:13:07,596 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:13:07,596 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-24 19:13:07,599 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 19:13:07,797 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 19:13:07,797 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-24 19:13:07,798 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:13:07,798 INFO L85 PathProgramCache]: Analyzing trace with hash 459562, now seen corresponding path program 1 times [2024-10-24 19:13:07,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:13:07,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [229903338] [2024-10-24 19:13:07,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:13:07,798 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 19:13:07,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:13:07,801 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 19:13:07,802 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 19:13:07,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:13:07,832 INFO L255 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-24 19:13:07,833 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:13:07,846 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 19:13:07,901 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 19:13:07,901 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:13:07,901 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:13:07,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [229903338] [2024-10-24 19:13:07,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [229903338] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:13:07,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:13:07,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:13:07,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226255750] [2024-10-24 19:13:07,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:13:07,903 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:13:07,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:13:07,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:13:07,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:13:08,008 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2024-10-24 19:13:08,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 41 transitions, 90 flow. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 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 19:13:08,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:13:08,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2024-10-24 19:13:08,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:13:08,174 INFO L124 PetriNetUnfolderBase]: 103/224 cut-off events. [2024-10-24 19:13:08,175 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-24 19:13:08,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391 conditions, 224 events. 103/224 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 831 event pairs, 35 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 355. Up to 152 conditions per place. [2024-10-24 19:13:08,178 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 23 selfloop transitions, 7 changer transitions 0/47 dead transitions. [2024-10-24 19:13:08,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 47 transitions, 164 flow [2024-10-24 19:13:08,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 19:13:08,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 19:13:08,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2024-10-24 19:13:08,179 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-10-24 19:13:08,179 INFO L175 Difference]: Start difference. First operand has 40 places, 41 transitions, 90 flow. Second operand 4 states and 120 transitions. [2024-10-24 19:13:08,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 47 transitions, 164 flow [2024-10-24 19:13:08,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 47 transitions, 158 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 19:13:08,181 INFO L231 Difference]: Finished difference. Result has 44 places, 47 transitions, 142 flow [2024-10-24 19:13:08,181 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=44, PETRI_TRANSITIONS=47} [2024-10-24 19:13:08,182 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, -2 predicate places. [2024-10-24 19:13:08,182 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 47 transitions, 142 flow [2024-10-24 19:13:08,182 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 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 19:13:08,182 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:13:08,185 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-24 19:13:08,190 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 19:13:08,387 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 19:13:08,388 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-24 19:13:08,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:13:08,388 INFO L85 PathProgramCache]: Analyzing trace with hash 441652740, now seen corresponding path program 1 times [2024-10-24 19:13:08,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:13:08,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [530680172] [2024-10-24 19:13:08,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:13:08,389 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 19:13:08,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:13:08,391 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 19:13:08,392 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 19:13:08,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:13:08,424 INFO L255 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-24 19:13:08,426 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:13:08,436 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 19:13:08,546 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 19:13:08,546 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:13:08,760 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 19:13:08,760 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:13:08,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [530680172] [2024-10-24 19:13:08,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [530680172] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:13:08,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:13:08,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-24 19:13:08,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914399008] [2024-10-24 19:13:08,762 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:13:08,762 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-24 19:13:08,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:13:08,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-24 19:13:08,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-10-24 19:13:09,172 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2024-10-24 19:13:09,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 47 transitions, 142 flow. Second operand has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:13:09,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:13:09,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2024-10-24 19:13:09,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:13:09,831 INFO L124 PetriNetUnfolderBase]: 109/242 cut-off events. [2024-10-24 19:13:09,832 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-10-24 19:13:09,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 469 conditions, 242 events. 109/242 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 941 event pairs, 35 based on Foata normal form. 0/149 useless extension candidates. Maximal degree in co-relation 366. Up to 155 conditions per place. [2024-10-24 19:13:09,833 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 23 selfloop transitions, 25 changer transitions 0/65 dead transitions. [2024-10-24 19:13:09,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 65 transitions, 316 flow [2024-10-24 19:13:09,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-24 19:13:09,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-24 19:13:09,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 274 transitions. [2024-10-24 19:13:09,836 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5708333333333333 [2024-10-24 19:13:09,836 INFO L175 Difference]: Start difference. First operand has 44 places, 47 transitions, 142 flow. Second operand 10 states and 274 transitions. [2024-10-24 19:13:09,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 65 transitions, 316 flow [2024-10-24 19:13:09,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 65 transitions, 316 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-24 19:13:09,839 INFO L231 Difference]: Finished difference. Result has 56 places, 65 transitions, 304 flow [2024-10-24 19:13:09,839 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=304, PETRI_PLACES=56, PETRI_TRANSITIONS=65} [2024-10-24 19:13:09,839 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 10 predicate places. [2024-10-24 19:13:09,839 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 65 transitions, 304 flow [2024-10-24 19:13:09,840 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:13:09,840 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:13:09,840 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:13:09,844 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 19:13:10,042 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 19:13:10,043 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-24 19:13:10,043 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:13:10,043 INFO L85 PathProgramCache]: Analyzing trace with hash -728139643, now seen corresponding path program 1 times [2024-10-24 19:13:10,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:13:10,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [269577461] [2024-10-24 19:13:10,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:13:10,044 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 19:13:10,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:13:10,045 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 19:13:10,046 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 19:13:10,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:13:10,094 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-24 19:13:10,095 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:13:10,152 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 19:13:10,153 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:13:10,153 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:13:10,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [269577461] [2024-10-24 19:13:10,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [269577461] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:13:10,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:13:10,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 19:13:10,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816122575] [2024-10-24 19:13:10,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:13:10,154 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:13:10,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:13:10,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:13:10,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:13:10,214 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2024-10-24 19:13:10,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 65 transitions, 304 flow. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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 19:13:10,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:13:10,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2024-10-24 19:13:10,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:13:10,324 INFO L124 PetriNetUnfolderBase]: 171/405 cut-off events. [2024-10-24 19:13:10,324 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-10-24 19:13:10,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 837 conditions, 405 events. 171/405 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1972 event pairs, 71 based on Foata normal form. 0/266 useless extension candidates. Maximal degree in co-relation 749. Up to 187 conditions per place. [2024-10-24 19:13:10,327 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 72 selfloop transitions, 3 changer transitions 0/93 dead transitions. [2024-10-24 19:13:10,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 93 transitions, 586 flow [2024-10-24 19:13:10,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 19:13:10,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 19:13:10,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 135 transitions. [2024-10-24 19:13:10,332 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.703125 [2024-10-24 19:13:10,332 INFO L175 Difference]: Start difference. First operand has 56 places, 65 transitions, 304 flow. Second operand 4 states and 135 transitions. [2024-10-24 19:13:10,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 93 transitions, 586 flow [2024-10-24 19:13:10,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 93 transitions, 492 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-10-24 19:13:10,339 INFO L231 Difference]: Finished difference. Result has 56 places, 65 transitions, 249 flow [2024-10-24 19:13:10,340 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=249, PETRI_PLACES=56, PETRI_TRANSITIONS=65} [2024-10-24 19:13:10,340 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 10 predicate places. [2024-10-24 19:13:10,341 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 65 transitions, 249 flow [2024-10-24 19:13:10,341 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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 19:13:10,341 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:13:10,341 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:13:10,346 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 19:13:10,542 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 19:13:10,542 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-24 19:13:10,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:13:10,543 INFO L85 PathProgramCache]: Analyzing trace with hash -225669537, now seen corresponding path program 1 times [2024-10-24 19:13:10,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:13:10,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1235600600] [2024-10-24 19:13:10,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:13:10,544 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 19:13:10,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:13:10,545 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 19:13:10,546 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 19:13:10,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:13:10,596 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-24 19:13:10,597 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:13:10,649 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 19:13:10,649 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:13:10,649 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:13:10,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1235600600] [2024-10-24 19:13:10,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1235600600] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:13:10,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:13:10,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 19:13:10,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711465592] [2024-10-24 19:13:10,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:13:10,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 19:13:10,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:13:10,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 19:13:10,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-24 19:13:10,696 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2024-10-24 19:13:10,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 65 transitions, 249 flow. Second operand has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 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 19:13:10,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:13:10,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2024-10-24 19:13:10,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:13:10,831 INFO L124 PetriNetUnfolderBase]: 343/816 cut-off events. [2024-10-24 19:13:10,831 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2024-10-24 19:13:10,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1514 conditions, 816 events. 343/816 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 4811 event pairs, 117 based on Foata normal form. 8/557 useless extension candidates. Maximal degree in co-relation 1438. Up to 239 conditions per place. [2024-10-24 19:13:10,836 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 66 selfloop transitions, 9 changer transitions 0/93 dead transitions. [2024-10-24 19:13:10,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 93 transitions, 464 flow [2024-10-24 19:13:10,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 19:13:10,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 19:13:10,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 170 transitions. [2024-10-24 19:13:10,837 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7083333333333334 [2024-10-24 19:13:10,838 INFO L175 Difference]: Start difference. First operand has 56 places, 65 transitions, 249 flow. Second operand 5 states and 170 transitions. [2024-10-24 19:13:10,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 93 transitions, 464 flow [2024-10-24 19:13:10,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 93 transitions, 460 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-24 19:13:10,840 INFO L231 Difference]: Finished difference. Result has 61 places, 66 transitions, 278 flow [2024-10-24 19:13:10,841 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=278, PETRI_PLACES=61, PETRI_TRANSITIONS=66} [2024-10-24 19:13:10,841 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 15 predicate places. [2024-10-24 19:13:10,841 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 66 transitions, 278 flow [2024-10-24 19:13:10,842 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 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 19:13:10,842 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:13:10,842 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:13:10,846 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 (6)] Ended with exit code 0 [2024-10-24 19:13:11,044 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 19:13:11,045 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-24 19:13:11,045 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:13:11,045 INFO L85 PathProgramCache]: Analyzing trace with hash 330879789, now seen corresponding path program 1 times [2024-10-24 19:13:11,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:13:11,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [592676759] [2024-10-24 19:13:11,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:13:11,046 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 19:13:11,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:13:11,047 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 19:13:11,048 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 19:13:11,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:13:11,088 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-24 19:13:11,089 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:13:11,092 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 19:13:11,108 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 19:13:11,108 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:13:11,109 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:13:11,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [592676759] [2024-10-24 19:13:11,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [592676759] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:13:11,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:13:11,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 19:13:11,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636396544] [2024-10-24 19:13:11,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:13:11,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:13:11,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:13:11,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:13:11,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:13:11,151 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-10-24 19:13:11,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 66 transitions, 278 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 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 19:13:11,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:13:11,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-10-24 19:13:11,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:13:11,255 INFO L124 PetriNetUnfolderBase]: 367/807 cut-off events. [2024-10-24 19:13:11,255 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2024-10-24 19:13:11,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1622 conditions, 807 events. 367/807 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 4579 event pairs, 212 based on Foata normal form. 0/674 useless extension candidates. Maximal degree in co-relation 1542. Up to 595 conditions per place. [2024-10-24 19:13:11,260 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 43 selfloop transitions, 6 changer transitions 0/64 dead transitions. [2024-10-24 19:13:11,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 64 transitions, 372 flow [2024-10-24 19:13:11,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 19:13:11,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 19:13:11,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-10-24 19:13:11,261 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2024-10-24 19:13:11,262 INFO L175 Difference]: Start difference. First operand has 61 places, 66 transitions, 278 flow. Second operand 4 states and 98 transitions. [2024-10-24 19:13:11,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 64 transitions, 372 flow [2024-10-24 19:13:11,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 64 transitions, 362 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 19:13:11,264 INFO L231 Difference]: Finished difference. Result has 60 places, 64 transitions, 276 flow [2024-10-24 19:13:11,265 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=276, PETRI_PLACES=60, PETRI_TRANSITIONS=64} [2024-10-24 19:13:11,265 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 14 predicate places. [2024-10-24 19:13:11,265 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 64 transitions, 276 flow [2024-10-24 19:13:11,265 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 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 19:13:11,265 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:13:11,266 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:13:11,272 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 (7)] Forceful destruction successful, exit code 0 [2024-10-24 19:13:11,466 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 19:13:11,466 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-24 19:13:11,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:13:11,467 INFO L85 PathProgramCache]: Analyzing trace with hash 330879790, now seen corresponding path program 1 times [2024-10-24 19:13:11,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:13:11,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [334515989] [2024-10-24 19:13:11,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:13:11,467 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 19:13:11,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:13:11,469 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 19:13:11,469 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 19:13:11,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:13:11,504 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-24 19:13:11,506 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:13:11,533 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 19:13:11,669 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 19:13:11,670 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:13:11,670 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:13:11,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [334515989] [2024-10-24 19:13:11,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [334515989] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:13:11,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:13:11,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 19:13:11,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665557823] [2024-10-24 19:13:11,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:13:11,670 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-24 19:13:11,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:13:11,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-24 19:13:11,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-10-24 19:13:11,795 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-10-24 19:13:11,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 64 transitions, 276 flow. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 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 19:13:11,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:13:11,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-10-24 19:13:11,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:13:12,075 INFO L124 PetriNetUnfolderBase]: 772/1657 cut-off events. [2024-10-24 19:13:12,076 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2024-10-24 19:13:12,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3227 conditions, 1657 events. 772/1657 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 10718 event pairs, 99 based on Foata normal form. 0/1282 useless extension candidates. Maximal degree in co-relation 3146. Up to 647 conditions per place. [2024-10-24 19:13:12,082 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 65 selfloop transitions, 14 changer transitions 0/92 dead transitions. [2024-10-24 19:13:12,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 92 transitions, 499 flow [2024-10-24 19:13:12,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 19:13:12,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-24 19:13:12,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-10-24 19:13:12,083 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-10-24 19:13:12,083 INFO L175 Difference]: Start difference. First operand has 60 places, 64 transitions, 276 flow. Second operand 6 states and 174 transitions. [2024-10-24 19:13:12,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 92 transitions, 499 flow [2024-10-24 19:13:12,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 92 transitions, 492 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 19:13:12,085 INFO L231 Difference]: Finished difference. Result has 65 places, 67 transitions, 321 flow [2024-10-24 19:13:12,085 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=321, PETRI_PLACES=65, PETRI_TRANSITIONS=67} [2024-10-24 19:13:12,086 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 19 predicate places. [2024-10-24 19:13:12,086 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 67 transitions, 321 flow [2024-10-24 19:13:12,086 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 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 19:13:12,086 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:13:12,086 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:13:12,094 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 (8)] Forceful destruction successful, exit code 0 [2024-10-24 19:13:12,286 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 19:13:12,287 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-24 19:13:12,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:13:12,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1667339291, now seen corresponding path program 1 times [2024-10-24 19:13:12,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:13:12,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [48363455] [2024-10-24 19:13:12,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:13:12,288 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 19:13:12,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:13:12,289 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 19:13:12,290 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 19:13:12,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:13:12,333 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-24 19:13:12,334 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:13:12,385 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 19:13:12,386 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:13:12,387 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:13:12,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [48363455] [2024-10-24 19:13:12,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [48363455] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:13:12,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:13:12,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 19:13:12,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309110084] [2024-10-24 19:13:12,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:13:12,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:13:12,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:13:12,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:13:12,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:13:12,437 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2024-10-24 19:13:12,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 67 transitions, 321 flow. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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 19:13:12,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:13:12,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2024-10-24 19:13:12,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:13:12,565 INFO L124 PetriNetUnfolderBase]: 440/961 cut-off events. [2024-10-24 19:13:12,565 INFO L125 PetriNetUnfolderBase]: For 276/290 co-relation queries the response was YES. [2024-10-24 19:13:12,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2125 conditions, 961 events. 440/961 cut-off events. For 276/290 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5560 event pairs, 282 based on Foata normal form. 10/864 useless extension candidates. Maximal degree in co-relation 2039. Up to 661 conditions per place. [2024-10-24 19:13:12,569 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 73 selfloop transitions, 3 changer transitions 0/93 dead transitions. [2024-10-24 19:13:12,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 93 transitions, 595 flow [2024-10-24 19:13:12,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 19:13:12,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 19:13:12,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 133 transitions. [2024-10-24 19:13:12,571 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6927083333333334 [2024-10-24 19:13:12,571 INFO L175 Difference]: Start difference. First operand has 65 places, 67 transitions, 321 flow. Second operand 4 states and 133 transitions. [2024-10-24 19:13:12,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 93 transitions, 595 flow [2024-10-24 19:13:12,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 93 transitions, 572 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-24 19:13:12,574 INFO L231 Difference]: Finished difference. Result has 66 places, 67 transitions, 312 flow [2024-10-24 19:13:12,574 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=312, PETRI_PLACES=66, PETRI_TRANSITIONS=67} [2024-10-24 19:13:12,575 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 20 predicate places. [2024-10-24 19:13:12,575 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 67 transitions, 312 flow [2024-10-24 19:13:12,575 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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 19:13:12,575 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:13:12,575 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:13:12,581 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 (9)] Ended with exit code 0 [2024-10-24 19:13:12,776 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 19:13:12,776 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-24 19:13:12,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:13:12,777 INFO L85 PathProgramCache]: Analyzing trace with hash 117102865, now seen corresponding path program 1 times [2024-10-24 19:13:12,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:13:12,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [75660517] [2024-10-24 19:13:12,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:13:12,777 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 19:13:12,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:13:12,778 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 19:13:12,779 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 19:13:12,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:13:12,837 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-24 19:13:12,839 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:13:12,850 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 19:13:12,861 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 19:13:12,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:13:12,975 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 19:13:12,987 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-24 19:13:12,987 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 19:13:13,119 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 19:13:13,120 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:13:13,449 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 19:13:13,450 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:13:13,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [75660517] [2024-10-24 19:13:13,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [75660517] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:13:13,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:13:13,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-24 19:13:13,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956823339] [2024-10-24 19:13:13,450 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:13:13,450 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-24 19:13:13,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:13:13,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-24 19:13:13,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-10-24 19:13:14,404 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-10-24 19:13:14,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 67 transitions, 312 flow. Second operand has 10 states, 10 states have (on average 19.8) internal successors, (198), 10 states have internal predecessors, (198), 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 19:13:14,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:13:14,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-10-24 19:13:14,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:13:15,502 INFO L124 PetriNetUnfolderBase]: 978/2043 cut-off events. [2024-10-24 19:13:15,502 INFO L125 PetriNetUnfolderBase]: For 344/361 co-relation queries the response was YES. [2024-10-24 19:13:15,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4359 conditions, 2043 events. 978/2043 cut-off events. For 344/361 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 13789 event pairs, 577 based on Foata normal form. 0/1723 useless extension candidates. Maximal degree in co-relation 4037. Up to 701 conditions per place. [2024-10-24 19:13:15,510 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 73 selfloop transitions, 54 changer transitions 0/142 dead transitions. [2024-10-24 19:13:15,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 142 transitions, 919 flow [2024-10-24 19:13:15,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-24 19:13:15,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-10-24 19:13:15,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 369 transitions. [2024-10-24 19:13:15,512 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5125 [2024-10-24 19:13:15,512 INFO L175 Difference]: Start difference. First operand has 66 places, 67 transitions, 312 flow. Second operand 15 states and 369 transitions. [2024-10-24 19:13:15,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 142 transitions, 919 flow [2024-10-24 19:13:15,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 142 transitions, 914 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 19:13:15,515 INFO L231 Difference]: Finished difference. Result has 89 places, 101 transitions, 738 flow [2024-10-24 19:13:15,516 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=738, PETRI_PLACES=89, PETRI_TRANSITIONS=101} [2024-10-24 19:13:15,517 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 43 predicate places. [2024-10-24 19:13:15,517 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 101 transitions, 738 flow [2024-10-24 19:13:15,517 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 19.8) internal successors, (198), 10 states have internal predecessors, (198), 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 19:13:15,517 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:13:15,518 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-10-24 19:13:15,522 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 (10)] Ended with exit code 0 [2024-10-24 19:13:15,718 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 19:13:15,719 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-24 19:13:15,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:13:15,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1566439314, now seen corresponding path program 2 times [2024-10-24 19:13:15,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:13:15,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [940847660] [2024-10-24 19:13:15,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 19:13:15,719 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 19:13:15,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:13:15,722 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 19:13:15,723 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 19:13:15,768 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 19:13:15,768 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:13:15,769 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-24 19:13:15,770 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:13:15,777 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 19:13:15,949 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 19:13:15,949 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:13:16,348 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 19:13:16,348 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:13:16,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [940847660] [2024-10-24 19:13:16,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [940847660] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:13:16,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:13:16,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-10-24 19:13:16,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494574423] [2024-10-24 19:13:16,349 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:13:16,349 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-24 19:13:16,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:13:16,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-24 19:13:16,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-24 19:13:17,498 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2024-10-24 19:13:17,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 101 transitions, 738 flow. Second operand has 14 states, 14 states have (on average 23.571428571428573) internal successors, (330), 14 states have internal predecessors, (330), 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 19:13:17,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:13:17,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2024-10-24 19:13:17,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:13:21,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-24 19:13:24,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-24 19:13:25,540 INFO L124 PetriNetUnfolderBase]: 835/1829 cut-off events. [2024-10-24 19:13:25,540 INFO L125 PetriNetUnfolderBase]: For 940/980 co-relation queries the response was YES. [2024-10-24 19:13:25,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4518 conditions, 1829 events. 835/1829 cut-off events. For 940/980 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 12405 event pairs, 541 based on Foata normal form. 30/1612 useless extension candidates. Maximal degree in co-relation 4338. Up to 1451 conditions per place. [2024-10-24 19:13:25,549 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 30 selfloop transitions, 113 changer transitions 0/161 dead transitions. [2024-10-24 19:13:25,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 161 transitions, 1528 flow [2024-10-24 19:13:25,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-24 19:13:25,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-24 19:13:25,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 580 transitions. [2024-10-24 19:13:25,552 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5492424242424242 [2024-10-24 19:13:25,552 INFO L175 Difference]: Start difference. First operand has 89 places, 101 transitions, 738 flow. Second operand 22 states and 580 transitions. [2024-10-24 19:13:25,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 161 transitions, 1528 flow [2024-10-24 19:13:25,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 161 transitions, 1528 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-24 19:13:25,558 INFO L231 Difference]: Finished difference. Result has 116 places, 161 transitions, 1558 flow [2024-10-24 19:13:25,558 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=738, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1558, PETRI_PLACES=116, PETRI_TRANSITIONS=161} [2024-10-24 19:13:25,559 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 70 predicate places. [2024-10-24 19:13:25,559 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 161 transitions, 1558 flow [2024-10-24 19:13:25,559 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 23.571428571428573) internal successors, (330), 14 states have internal predecessors, (330), 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 19:13:25,559 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:13:25,559 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:13:25,563 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 19:13:25,762 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 19:13:25,762 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-24 19:13:25,762 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:13:25,762 INFO L85 PathProgramCache]: Analyzing trace with hash 117102864, now seen corresponding path program 1 times [2024-10-24 19:13:25,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:13:25,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [228540612] [2024-10-24 19:13:25,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:13:25,763 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 19:13:25,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:13:25,764 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 19:13:25,765 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 19:13:25,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:13:25,825 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-24 19:13:25,826 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:13:25,828 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 19:13:25,846 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-10-24 19:13:25,847 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 19:13:25,857 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 19:13:25,858 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:13:25,858 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:13:25,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [228540612] [2024-10-24 19:13:25,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [228540612] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:13:25,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:13:25,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:13:25,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349056037] [2024-10-24 19:13:25,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:13:25,858 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:13:25,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:13:25,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:13:25,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:13:25,902 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-10-24 19:13:25,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 161 transitions, 1558 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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 19:13:25,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:13:25,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-10-24 19:13:25,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:13:26,098 INFO L124 PetriNetUnfolderBase]: 1096/2324 cut-off events. [2024-10-24 19:13:26,099 INFO L125 PetriNetUnfolderBase]: For 1171/1196 co-relation queries the response was YES. [2024-10-24 19:13:26,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5884 conditions, 2324 events. 1096/2324 cut-off events. For 1171/1196 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 16214 event pairs, 776 based on Foata normal form. 80/2311 useless extension candidates. Maximal degree in co-relation 5659. Up to 1842 conditions per place. [2024-10-24 19:13:26,113 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 113 selfloop transitions, 31 changer transitions 0/159 dead transitions. [2024-10-24 19:13:26,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 159 transitions, 1842 flow [2024-10-24 19:13:26,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 19:13:26,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 19:13:26,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-10-24 19:13:26,114 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2024-10-24 19:13:26,114 INFO L175 Difference]: Start difference. First operand has 116 places, 161 transitions, 1558 flow. Second operand 5 states and 116 transitions. [2024-10-24 19:13:26,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 159 transitions, 1842 flow [2024-10-24 19:13:26,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 159 transitions, 1550 flow, removed 87 selfloop flow, removed 9 redundant places. [2024-10-24 19:13:26,125 INFO L231 Difference]: Finished difference. Result has 109 places, 159 transitions, 1324 flow [2024-10-24 19:13:26,125 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1262, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1324, PETRI_PLACES=109, PETRI_TRANSITIONS=159} [2024-10-24 19:13:26,126 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 63 predicate places. [2024-10-24 19:13:26,126 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 159 transitions, 1324 flow [2024-10-24 19:13:26,126 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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 19:13:26,126 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:13:26,126 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:13:26,130 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 19:13:26,327 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 19:13:26,327 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-24 19:13:26,327 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:13:26,327 INFO L85 PathProgramCache]: Analyzing trace with hash -664778099, now seen corresponding path program 1 times [2024-10-24 19:13:26,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:13:26,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [216887325] [2024-10-24 19:13:26,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:13:26,328 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 19:13:26,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:13:26,329 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 19:13:26,330 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 19:13:26,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:13:26,383 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 19:13:26,384 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:13:26,450 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 19:13:26,450 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:13:26,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2024-10-24 19:13:26,610 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 19:13:26,610 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:13:26,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [216887325] [2024-10-24 19:13:26,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [216887325] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:13:26,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:13:26,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-24 19:13:26,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801330857] [2024-10-24 19:13:26,611 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:13:26,611 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-24 19:13:26,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:13:26,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-24 19:13:26,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-10-24 19:13:26,942 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2024-10-24 19:13:26,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 159 transitions, 1324 flow. Second operand has 10 states, 10 states have (on average 23.8) internal successors, (238), 10 states have internal predecessors, (238), 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 19:13:26,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:13:26,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2024-10-24 19:13:26,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:13:27,382 INFO L124 PetriNetUnfolderBase]: 896/1917 cut-off events. [2024-10-24 19:13:27,382 INFO L125 PetriNetUnfolderBase]: For 918/924 co-relation queries the response was YES. [2024-10-24 19:13:27,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4882 conditions, 1917 events. 896/1917 cut-off events. For 918/924 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 12823 event pairs, 472 based on Foata normal form. 32/1765 useless extension candidates. Maximal degree in co-relation 4680. Up to 697 conditions per place. [2024-10-24 19:13:27,393 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 141 selfloop transitions, 44 changer transitions 0/200 dead transitions. [2024-10-24 19:13:27,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 200 transitions, 1800 flow [2024-10-24 19:13:27,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 19:13:27,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-24 19:13:27,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 252 transitions. [2024-10-24 19:13:27,395 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.65625 [2024-10-24 19:13:27,395 INFO L175 Difference]: Start difference. First operand has 109 places, 159 transitions, 1324 flow. Second operand 8 states and 252 transitions. [2024-10-24 19:13:27,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 200 transitions, 1800 flow [2024-10-24 19:13:27,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 200 transitions, 1757 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-24 19:13:27,406 INFO L231 Difference]: Finished difference. Result has 115 places, 160 transitions, 1400 flow [2024-10-24 19:13:27,407 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1281, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1400, PETRI_PLACES=115, PETRI_TRANSITIONS=160} [2024-10-24 19:13:27,408 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 69 predicate places. [2024-10-24 19:13:27,408 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 160 transitions, 1400 flow [2024-10-24 19:13:27,408 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 23.8) internal successors, (238), 10 states have internal predecessors, (238), 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 19:13:27,408 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:13:27,409 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:13:27,412 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 19:13:27,609 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 19:13:27,609 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-24 19:13:27,609 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:13:27,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1501726718, now seen corresponding path program 1 times [2024-10-24 19:13:27,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:13:27,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1413947881] [2024-10-24 19:13:27,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:13:27,610 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 19:13:27,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:13:27,611 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 19:13:27,613 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 19:13:27,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:13:27,672 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-24 19:13:27,672 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:13:27,730 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 19:13:27,731 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:13:27,731 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:13:27,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1413947881] [2024-10-24 19:13:27,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1413947881] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:13:27,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:13:27,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 19:13:27,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149987261] [2024-10-24 19:13:27,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:13:27,732 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 19:13:27,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:13:27,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 19:13:27,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-24 19:13:27,771 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2024-10-24 19:13:27,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 160 transitions, 1400 flow. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 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 19:13:27,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:13:27,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2024-10-24 19:13:27,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:13:27,938 INFO L124 PetriNetUnfolderBase]: 761/1688 cut-off events. [2024-10-24 19:13:27,939 INFO L125 PetriNetUnfolderBase]: For 1863/1877 co-relation queries the response was YES. [2024-10-24 19:13:27,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4538 conditions, 1688 events. 761/1688 cut-off events. For 1863/1877 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 11088 event pairs, 337 based on Foata normal form. 15/1575 useless extension candidates. Maximal degree in co-relation 4325. Up to 758 conditions per place. [2024-10-24 19:13:27,946 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 148 selfloop transitions, 20 changer transitions 0/185 dead transitions. [2024-10-24 19:13:27,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 185 transitions, 1823 flow [2024-10-24 19:13:27,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 19:13:27,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 19:13:27,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 166 transitions. [2024-10-24 19:13:27,947 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6916666666666667 [2024-10-24 19:13:27,947 INFO L175 Difference]: Start difference. First operand has 115 places, 160 transitions, 1400 flow. Second operand 5 states and 166 transitions. [2024-10-24 19:13:27,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 185 transitions, 1823 flow [2024-10-24 19:13:27,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 185 transitions, 1746 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-10-24 19:13:27,955 INFO L231 Difference]: Finished difference. Result has 116 places, 160 transitions, 1374 flow [2024-10-24 19:13:27,956 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1329, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1374, PETRI_PLACES=116, PETRI_TRANSITIONS=160} [2024-10-24 19:13:27,956 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 70 predicate places. [2024-10-24 19:13:27,956 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 160 transitions, 1374 flow [2024-10-24 19:13:27,956 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 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 19:13:27,956 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:13:27,956 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:13:27,961 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 (14)] Ended with exit code 0 [2024-10-24 19:13:28,159 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 19:13:28,159 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-24 19:13:28,159 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:13:28,159 INFO L85 PathProgramCache]: Analyzing trace with hash 893638672, now seen corresponding path program 1 times [2024-10-24 19:13:28,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:13:28,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [214483309] [2024-10-24 19:13:28,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:13:28,160 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 19:13:28,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:13:28,161 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 19:13:28,162 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 19:13:28,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:13:28,234 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-24 19:13:28,235 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:13:28,243 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 19:13:28,252 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 19:13:28,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:13:28,373 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 19:13:28,381 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-24 19:13:28,381 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 19:13:28,533 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 19:13:28,533 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:13:28,876 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 19:13:28,877 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:13:28,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [214483309] [2024-10-24 19:13:28,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [214483309] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:13:28,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:13:28,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-24 19:13:28,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774310209] [2024-10-24 19:13:28,877 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:13:28,877 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-24 19:13:28,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:13:28,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-24 19:13:28,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-10-24 19:13:29,582 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-10-24 19:13:29,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 160 transitions, 1374 flow. Second operand has 10 states, 10 states have (on average 20.2) internal successors, (202), 10 states have internal predecessors, (202), 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 19:13:29,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:13:29,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-10-24 19:13:29,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:13:30,769 INFO L124 PetriNetUnfolderBase]: 1135/2289 cut-off events. [2024-10-24 19:13:30,769 INFO L125 PetriNetUnfolderBase]: For 1727/1735 co-relation queries the response was YES. [2024-10-24 19:13:30,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5947 conditions, 2289 events. 1135/2289 cut-off events. For 1727/1735 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 15177 event pairs, 627 based on Foata normal form. 0/2073 useless extension candidates. Maximal degree in co-relation 5732. Up to 917 conditions per place. [2024-10-24 19:13:30,780 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 99 selfloop transitions, 102 changer transitions 0/216 dead transitions. [2024-10-24 19:13:30,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 216 transitions, 2180 flow [2024-10-24 19:13:30,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-24 19:13:30,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-10-24 19:13:30,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 369 transitions. [2024-10-24 19:13:30,782 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5125 [2024-10-24 19:13:30,782 INFO L175 Difference]: Start difference. First operand has 116 places, 160 transitions, 1374 flow. Second operand 15 states and 369 transitions. [2024-10-24 19:13:30,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 216 transitions, 2180 flow [2024-10-24 19:13:30,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 216 transitions, 2140 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-24 19:13:30,791 INFO L231 Difference]: Finished difference. Result has 130 places, 162 transitions, 1646 flow [2024-10-24 19:13:30,792 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1337, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1646, PETRI_PLACES=130, PETRI_TRANSITIONS=162} [2024-10-24 19:13:30,793 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 84 predicate places. [2024-10-24 19:13:30,793 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 162 transitions, 1646 flow [2024-10-24 19:13:30,793 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.2) internal successors, (202), 10 states have internal predecessors, (202), 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 19:13:30,793 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:13:30,793 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:13:30,797 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 (15)] Ended with exit code 0 [2024-10-24 19:13:30,994 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 19:13:30,994 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-24 19:13:30,994 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:13:30,994 INFO L85 PathProgramCache]: Analyzing trace with hash -309763434, now seen corresponding path program 1 times [2024-10-24 19:13:30,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:13:30,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1513683166] [2024-10-24 19:13:30,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:13:30,995 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 19:13:30,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:13:30,997 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 19:13:30,998 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 19:13:31,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:13:31,059 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-24 19:13:31,059 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:13:31,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:13:31,161 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:13:31,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:13:31,268 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:13:31,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1513683166] [2024-10-24 19:13:31,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1513683166] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:13:31,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:13:31,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2024-10-24 19:13:31,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814008870] [2024-10-24 19:13:31,268 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:13:31,269 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-24 19:13:31,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:13:31,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-24 19:13:31,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2024-10-24 19:13:31,452 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2024-10-24 19:13:31,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 162 transitions, 1646 flow. Second operand has 12 states, 12 states have (on average 24.833333333333332) internal successors, (298), 12 states have internal predecessors, (298), 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 19:13:31,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:13:31,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2024-10-24 19:13:31,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:13:31,900 INFO L124 PetriNetUnfolderBase]: 1006/2198 cut-off events. [2024-10-24 19:13:31,900 INFO L125 PetriNetUnfolderBase]: For 1891/1905 co-relation queries the response was YES. [2024-10-24 19:13:31,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6210 conditions, 2198 events. 1006/2198 cut-off events. For 1891/1905 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 15132 event pairs, 708 based on Foata normal form. 18/2032 useless extension candidates. Maximal degree in co-relation 5970. Up to 1194 conditions per place. [2024-10-24 19:13:31,911 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 145 selfloop transitions, 69 changer transitions 0/233 dead transitions. [2024-10-24 19:13:31,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 233 transitions, 2546 flow [2024-10-24 19:13:31,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-24 19:13:31,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-24 19:13:31,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 282 transitions. [2024-10-24 19:13:31,912 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6527777777777778 [2024-10-24 19:13:31,912 INFO L175 Difference]: Start difference. First operand has 130 places, 162 transitions, 1646 flow. Second operand 9 states and 282 transitions. [2024-10-24 19:13:31,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 233 transitions, 2546 flow [2024-10-24 19:13:31,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 233 transitions, 2420 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-10-24 19:13:31,925 INFO L231 Difference]: Finished difference. Result has 130 places, 177 transitions, 1997 flow [2024-10-24 19:13:31,925 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1535, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1997, PETRI_PLACES=130, PETRI_TRANSITIONS=177} [2024-10-24 19:13:31,925 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 84 predicate places. [2024-10-24 19:13:31,926 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 177 transitions, 1997 flow [2024-10-24 19:13:31,926 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 24.833333333333332) internal successors, (298), 12 states have internal predecessors, (298), 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 19:13:31,926 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:13:31,926 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:13:31,930 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 (16)] Forceful destruction successful, exit code 0 [2024-10-24 19:13:32,126 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 19:13:32,127 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-24 19:13:32,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:13:32,127 INFO L85 PathProgramCache]: Analyzing trace with hash -682011562, now seen corresponding path program 1 times [2024-10-24 19:13:32,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:13:32,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [715673037] [2024-10-24 19:13:32,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:13:32,128 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 19:13:32,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:13:32,130 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 19:13:32,131 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 19:13:32,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:13:32,169 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-24 19:13:32,170 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:13:32,205 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 19:13:32,205 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:13:32,206 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:13:32,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [715673037] [2024-10-24 19:13:32,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [715673037] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:13:32,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:13:32,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:13:32,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277453699] [2024-10-24 19:13:32,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:13:32,206 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:13:32,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:13:32,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:13:32,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:13:32,236 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2024-10-24 19:13:32,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 177 transitions, 1997 flow. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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 19:13:32,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:13:32,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2024-10-24 19:13:32,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:13:32,431 INFO L124 PetriNetUnfolderBase]: 959/2180 cut-off events. [2024-10-24 19:13:32,432 INFO L125 PetriNetUnfolderBase]: For 2755/2860 co-relation queries the response was YES. [2024-10-24 19:13:32,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6298 conditions, 2180 events. 959/2180 cut-off events. For 2755/2860 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 15139 event pairs, 339 based on Foata normal form. 12/2084 useless extension candidates. Maximal degree in co-relation 6063. Up to 983 conditions per place. [2024-10-24 19:13:32,439 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 160 selfloop transitions, 5 changer transitions 7/192 dead transitions. [2024-10-24 19:13:32,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 192 transitions, 2405 flow [2024-10-24 19:13:32,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:13:32,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:13:32,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 108 transitions. [2024-10-24 19:13:32,440 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.75 [2024-10-24 19:13:32,440 INFO L175 Difference]: Start difference. First operand has 130 places, 177 transitions, 1997 flow. Second operand 3 states and 108 transitions. [2024-10-24 19:13:32,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 192 transitions, 2405 flow [2024-10-24 19:13:32,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 192 transitions, 2399 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 19:13:32,452 INFO L231 Difference]: Finished difference. Result has 131 places, 175 transitions, 1947 flow [2024-10-24 19:13:32,452 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1992, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1947, PETRI_PLACES=131, PETRI_TRANSITIONS=175} [2024-10-24 19:13:32,452 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 85 predicate places. [2024-10-24 19:13:32,452 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 175 transitions, 1947 flow [2024-10-24 19:13:32,452 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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 19:13:32,453 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:13:32,453 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:13:32,456 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 (17)] Forceful destruction successful, exit code 0 [2024-10-24 19:13:32,653 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /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 19:13:32,653 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-24 19:13:32,653 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:13:32,654 INFO L85 PathProgramCache]: Analyzing trace with hash -2112196417, now seen corresponding path program 1 times [2024-10-24 19:13:32,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:13:32,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [984214689] [2024-10-24 19:13:32,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:13:32,654 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 19:13:32,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:13:32,655 INFO L229 MonitoredProcess]: Starting monitored process 18 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 19:13:32,656 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 (18)] Waiting until timeout for monitored process [2024-10-24 19:13:32,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:13:32,712 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-24 19:13:32,714 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:13:32,725 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 19:13:32,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 19:13:32,873 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:13:33,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 19:13:33,390 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:13:33,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [984214689] [2024-10-24 19:13:33,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [984214689] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:13:33,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:13:33,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-10-24 19:13:33,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805842072] [2024-10-24 19:13:33,390 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:13:33,391 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-24 19:13:33,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:13:33,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-24 19:13:33,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-10-24 19:13:34,173 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-10-24 19:13:34,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 175 transitions, 1947 flow. Second operand has 14 states, 14 states have (on average 22.142857142857142) internal successors, (310), 14 states have internal predecessors, (310), 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 19:13:34,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:13:34,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-10-24 19:13:34,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:13:35,386 INFO L124 PetriNetUnfolderBase]: 2478/4847 cut-off events. [2024-10-24 19:13:35,386 INFO L125 PetriNetUnfolderBase]: For 5370/5393 co-relation queries the response was YES. [2024-10-24 19:13:35,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13709 conditions, 4847 events. 2478/4847 cut-off events. For 5370/5393 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 33393 event pairs, 134 based on Foata normal form. 138/4956 useless extension candidates. Maximal degree in co-relation 13472. Up to 915 conditions per place. [2024-10-24 19:13:35,409 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 238 selfloop transitions, 38 changer transitions 1/290 dead transitions. [2024-10-24 19:13:35,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 290 transitions, 3026 flow [2024-10-24 19:13:35,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-24 19:13:35,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-24 19:13:35,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 368 transitions. [2024-10-24 19:13:35,411 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2024-10-24 19:13:35,411 INFO L175 Difference]: Start difference. First operand has 131 places, 175 transitions, 1947 flow. Second operand 12 states and 368 transitions. [2024-10-24 19:13:35,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 290 transitions, 3026 flow [2024-10-24 19:13:35,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 290 transitions, 3012 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-10-24 19:13:35,428 INFO L231 Difference]: Finished difference. Result has 138 places, 182 transitions, 2065 flow [2024-10-24 19:13:35,428 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1933, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2065, PETRI_PLACES=138, PETRI_TRANSITIONS=182} [2024-10-24 19:13:35,429 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 92 predicate places. [2024-10-24 19:13:35,429 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 182 transitions, 2065 flow [2024-10-24 19:13:35,429 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 22.142857142857142) internal successors, (310), 14 states have internal predecessors, (310), 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 19:13:35,429 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:13:35,429 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:13:35,435 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 (18)] Ended with exit code 0 [2024-10-24 19:13:35,630 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /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 19:13:35,630 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-24 19:13:35,630 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:13:35,630 INFO L85 PathProgramCache]: Analyzing trace with hash 206428191, now seen corresponding path program 2 times [2024-10-24 19:13:35,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:13:35,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [386925662] [2024-10-24 19:13:35,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 19:13:35,631 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 19:13:35,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:13:35,633 INFO L229 MonitoredProcess]: Starting monitored process 19 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 19:13:35,634 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 (19)] Waiting until timeout for monitored process [2024-10-24 19:13:35,680 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-24 19:13:35,680 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:13:35,681 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-24 19:13:35,683 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:13:35,691 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 19:13:35,698 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 19:13:35,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:13:35,784 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 19:13:35,792 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-24 19:13:35,792 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 19:13:35,869 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-24 19:13:35,870 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:13:35,870 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:13:35,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [386925662] [2024-10-24 19:13:35,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [386925662] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:13:35,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:13:35,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 19:13:35,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782364676] [2024-10-24 19:13:35,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:13:35,870 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 19:13:35,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:13:35,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 19:13:35,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-24 19:13:36,003 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-10-24 19:13:36,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 182 transitions, 2065 flow. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 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 19:13:36,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:13:36,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-10-24 19:13:36,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:13:36,638 INFO L124 PetriNetUnfolderBase]: 2585/5341 cut-off events. [2024-10-24 19:13:36,638 INFO L125 PetriNetUnfolderBase]: For 7405/7520 co-relation queries the response was YES. [2024-10-24 19:13:36,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16048 conditions, 5341 events. 2585/5341 cut-off events. For 7405/7520 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 39111 event pairs, 489 based on Foata normal form. 56/5337 useless extension candidates. Maximal degree in co-relation 15802. Up to 2113 conditions per place. [2024-10-24 19:13:36,666 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 174 selfloop transitions, 19 changer transitions 1/213 dead transitions. [2024-10-24 19:13:36,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 213 transitions, 2575 flow [2024-10-24 19:13:36,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 19:13:36,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 19:13:36,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 145 transitions. [2024-10-24 19:13:36,667 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-10-24 19:13:36,667 INFO L175 Difference]: Start difference. First operand has 138 places, 182 transitions, 2065 flow. Second operand 5 states and 145 transitions. [2024-10-24 19:13:36,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 213 transitions, 2575 flow [2024-10-24 19:13:36,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 213 transitions, 2506 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-10-24 19:13:36,689 INFO L231 Difference]: Finished difference. Result has 140 places, 185 transitions, 2085 flow [2024-10-24 19:13:36,689 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2002, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2085, PETRI_PLACES=140, PETRI_TRANSITIONS=185} [2024-10-24 19:13:36,689 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 94 predicate places. [2024-10-24 19:13:36,689 INFO L471 AbstractCegarLoop]: Abstraction has has 140 places, 185 transitions, 2085 flow [2024-10-24 19:13:36,690 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 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 19:13:36,690 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:13:36,690 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:13:36,693 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 (19)] Forceful destruction successful, exit code 0 [2024-10-24 19:13:36,892 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /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 19:13:36,892 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-24 19:13:36,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:13:36,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1205730928, now seen corresponding path program 2 times [2024-10-24 19:13:36,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:13:36,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [909796852] [2024-10-24 19:13:36,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 19:13:36,893 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 19:13:36,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:13:36,894 INFO L229 MonitoredProcess]: Starting monitored process 20 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 19:13:36,895 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 (20)] Waiting until timeout for monitored process [2024-10-24 19:13:36,955 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 19:13:36,955 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:13:36,957 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-24 19:13:36,958 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:13:36,967 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 19:13:36,971 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 1 [2024-10-24 19:13:37,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:13:37,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-24 19:13:37,051 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-24 19:13:37,052 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 19:13:37,122 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:13:37,122 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:13:41,594 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:13:41,594 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:13:41,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [909796852] [2024-10-24 19:13:41,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [909796852] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:13:41,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:13:41,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-10-24 19:13:41,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37759428] [2024-10-24 19:13:41,595 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:13:41,595 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-24 19:13:41,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:13:41,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-24 19:13:41,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=99, Unknown=1, NotChecked=0, Total=132 [2024-10-24 19:13:46,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-24 19:13:46,980 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 48 [2024-10-24 19:13:46,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 185 transitions, 2085 flow. Second operand has 12 states, 12 states have (on average 19.166666666666668) internal successors, (230), 12 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:13:46,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:13:46,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 48 [2024-10-24 19:13:46,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:13:48,236 INFO L124 PetriNetUnfolderBase]: 2769/5979 cut-off events. [2024-10-24 19:13:48,236 INFO L125 PetriNetUnfolderBase]: For 7788/7876 co-relation queries the response was YES. [2024-10-24 19:13:48,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17516 conditions, 5979 events. 2769/5979 cut-off events. For 7788/7876 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 47200 event pairs, 1366 based on Foata normal form. 62/5685 useless extension candidates. Maximal degree in co-relation 17276. Up to 1634 conditions per place. [2024-10-24 19:13:48,273 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 172 selfloop transitions, 49 changer transitions 0/244 dead transitions. [2024-10-24 19:13:48,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 244 transitions, 2854 flow [2024-10-24 19:13:48,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-24 19:13:48,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-24 19:13:48,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 276 transitions. [2024-10-24 19:13:48,275 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5227272727272727 [2024-10-24 19:13:48,275 INFO L175 Difference]: Start difference. First operand has 140 places, 185 transitions, 2085 flow. Second operand 11 states and 276 transitions. [2024-10-24 19:13:48,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 244 transitions, 2854 flow [2024-10-24 19:13:48,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 244 transitions, 2809 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-10-24 19:13:48,301 INFO L231 Difference]: Finished difference. Result has 149 places, 195 transitions, 2260 flow [2024-10-24 19:13:48,301 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2047, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2260, PETRI_PLACES=149, PETRI_TRANSITIONS=195} [2024-10-24 19:13:48,302 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 103 predicate places. [2024-10-24 19:13:48,302 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 195 transitions, 2260 flow [2024-10-24 19:13:48,302 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 19.166666666666668) internal successors, (230), 12 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:13:48,302 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:13:48,302 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:13:48,307 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 (20)] Forceful destruction successful, exit code 0 [2024-10-24 19:13:48,503 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /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 19:13:48,504 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-24 19:13:48,504 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:13:48,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1277046514, now seen corresponding path program 1 times [2024-10-24 19:13:48,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:13:48,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [395842062] [2024-10-24 19:13:48,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:13:48,505 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 19:13:48,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:13:48,507 INFO L229 MonitoredProcess]: Starting monitored process 21 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 19:13:48,508 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 (21)] Waiting until timeout for monitored process [2024-10-24 19:13:48,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:13:48,583 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-24 19:13:48,584 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:13:48,601 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 19:13:48,766 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-24 19:13:48,766 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:13:49,350 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-24 19:13:49,350 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:13:49,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [395842062] [2024-10-24 19:13:49,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [395842062] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:13:49,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:13:49,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-10-24 19:13:49,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532335103] [2024-10-24 19:13:49,350 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:13:49,350 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-24 19:13:49,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:13:49,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-24 19:13:49,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-10-24 19:13:50,160 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-10-24 19:13:50,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 195 transitions, 2260 flow. Second operand has 14 states, 14 states have (on average 21.857142857142858) internal successors, (306), 14 states have internal predecessors, (306), 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 19:13:50,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:13:50,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-10-24 19:13:50,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:13:51,845 INFO L124 PetriNetUnfolderBase]: 4602/9190 cut-off events. [2024-10-24 19:13:51,846 INFO L125 PetriNetUnfolderBase]: For 14339/14516 co-relation queries the response was YES. [2024-10-24 19:13:51,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28084 conditions, 9190 events. 4602/9190 cut-off events. For 14339/14516 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 70749 event pairs, 380 based on Foata normal form. 205/9268 useless extension candidates. Maximal degree in co-relation 27844. Up to 2453 conditions per place. [2024-10-24 19:13:51,891 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 264 selfloop transitions, 45 changer transitions 1/332 dead transitions. [2024-10-24 19:13:51,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 332 transitions, 3491 flow [2024-10-24 19:13:51,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-24 19:13:51,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-24 19:13:51,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 382 transitions. [2024-10-24 19:13:51,893 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6631944444444444 [2024-10-24 19:13:51,893 INFO L175 Difference]: Start difference. First operand has 149 places, 195 transitions, 2260 flow. Second operand 12 states and 382 transitions. [2024-10-24 19:13:51,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 332 transitions, 3491 flow [2024-10-24 19:13:51,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 332 transitions, 3403 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-10-24 19:13:51,926 INFO L231 Difference]: Finished difference. Result has 157 places, 203 transitions, 2365 flow [2024-10-24 19:13:51,927 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2172, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2365, PETRI_PLACES=157, PETRI_TRANSITIONS=203} [2024-10-24 19:13:51,927 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 111 predicate places. [2024-10-24 19:13:51,927 INFO L471 AbstractCegarLoop]: Abstraction has has 157 places, 203 transitions, 2365 flow [2024-10-24 19:13:51,927 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 21.857142857142858) internal successors, (306), 14 states have internal predecessors, (306), 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 19:13:51,927 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:13:51,927 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:13:51,931 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 (21)] Forceful destruction successful, exit code 0 [2024-10-24 19:13:52,128 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /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 19:13:52,128 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-24 19:13:52,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:13:52,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1053579093, now seen corresponding path program 1 times [2024-10-24 19:13:52,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:13:52,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [309592591] [2024-10-24 19:13:52,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:13:52,129 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 19:13:52,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:13:52,130 INFO L229 MonitoredProcess]: Starting monitored process 22 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 19:13:52,131 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 (22)] Waiting until timeout for monitored process [2024-10-24 19:13:52,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:13:52,202 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-24 19:13:52,202 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:13:52,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:13:52,303 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:13:52,404 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:13:52,404 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:13:52,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [309592591] [2024-10-24 19:13:52,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [309592591] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:13:52,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:13:52,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2024-10-24 19:13:52,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417704693] [2024-10-24 19:13:52,404 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:13:52,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-24 19:13:52,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:13:52,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-24 19:13:52,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2024-10-24 19:13:52,587 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2024-10-24 19:13:52,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 203 transitions, 2365 flow. Second operand has 12 states, 12 states have (on average 25.166666666666668) internal successors, (302), 12 states have internal predecessors, (302), 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 19:13:52,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:13:52,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2024-10-24 19:13:52,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:13:53,412 INFO L124 PetriNetUnfolderBase]: 3138/6684 cut-off events. [2024-10-24 19:13:53,412 INFO L125 PetriNetUnfolderBase]: For 14205/14457 co-relation queries the response was YES. [2024-10-24 19:13:53,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20614 conditions, 6684 events. 3138/6684 cut-off events. For 14205/14457 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 52107 event pairs, 2665 based on Foata normal form. 25/6331 useless extension candidates. Maximal degree in co-relation 20323. Up to 4877 conditions per place. [2024-10-24 19:13:53,505 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 129 selfloop transitions, 70 changer transitions 17/247 dead transitions. [2024-10-24 19:13:53,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 247 transitions, 3021 flow [2024-10-24 19:13:53,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-24 19:13:53,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-24 19:13:53,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 279 transitions. [2024-10-24 19:13:53,507 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2024-10-24 19:13:53,507 INFO L175 Difference]: Start difference. First operand has 157 places, 203 transitions, 2365 flow. Second operand 9 states and 279 transitions. [2024-10-24 19:13:53,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 247 transitions, 3021 flow [2024-10-24 19:13:53,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 247 transitions, 2958 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-10-24 19:13:53,531 INFO L231 Difference]: Finished difference. Result has 163 places, 203 transitions, 2453 flow [2024-10-24 19:13:53,532 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2309, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2453, PETRI_PLACES=163, PETRI_TRANSITIONS=203} [2024-10-24 19:13:53,532 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 117 predicate places. [2024-10-24 19:13:53,532 INFO L471 AbstractCegarLoop]: Abstraction has has 163 places, 203 transitions, 2453 flow [2024-10-24 19:13:53,532 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 25.166666666666668) internal successors, (302), 12 states have internal predecessors, (302), 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 19:13:53,533 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:13:53,533 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:13:53,537 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 (22)] Forceful destruction successful, exit code 0 [2024-10-24 19:13:53,733 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /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 19:13:53,733 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-24 19:13:53,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:13:53,734 INFO L85 PathProgramCache]: Analyzing trace with hash -895297982, now seen corresponding path program 2 times [2024-10-24 19:13:53,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:13:53,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1527155661] [2024-10-24 19:13:53,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 19:13:53,734 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 19:13:53,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:13:53,735 INFO L229 MonitoredProcess]: Starting monitored process 23 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 19:13:53,737 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 (23)] Waiting until timeout for monitored process [2024-10-24 19:13:53,785 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-24 19:13:53,785 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:13:53,786 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-24 19:13:53,787 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:13:53,795 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 19:13:53,800 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 19:13:53,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:13:53,903 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 19:13:53,913 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-24 19:13:53,913 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 19:13:54,019 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-24 19:13:54,019 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:13:54,019 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:13:54,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1527155661] [2024-10-24 19:13:54,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1527155661] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:13:54,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:13:54,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 19:13:54,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445672509] [2024-10-24 19:13:54,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:13:54,020 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 19:13:54,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:13:54,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 19:13:54,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-24 19:13:54,141 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-10-24 19:13:54,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 203 transitions, 2453 flow. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 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 19:13:54,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:13:54,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-10-24 19:13:54,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:13:55,155 INFO L124 PetriNetUnfolderBase]: 4262/8293 cut-off events. [2024-10-24 19:13:55,155 INFO L125 PetriNetUnfolderBase]: For 19738/19900 co-relation queries the response was YES. [2024-10-24 19:13:55,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26985 conditions, 8293 events. 4262/8293 cut-off events. For 19738/19900 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 60853 event pairs, 233 based on Foata normal form. 67/8258 useless extension candidates. Maximal degree in co-relation 26681. Up to 5086 conditions per place. [2024-10-24 19:13:55,202 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 191 selfloop transitions, 20 changer transitions 1/234 dead transitions. [2024-10-24 19:13:55,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 234 transitions, 3035 flow [2024-10-24 19:13:55,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 19:13:55,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 19:13:55,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-10-24 19:13:55,203 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5958333333333333 [2024-10-24 19:13:55,203 INFO L175 Difference]: Start difference. First operand has 163 places, 203 transitions, 2453 flow. Second operand 5 states and 143 transitions. [2024-10-24 19:13:55,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 234 transitions, 3035 flow [2024-10-24 19:13:55,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 234 transitions, 2898 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-24 19:13:55,237 INFO L231 Difference]: Finished difference. Result has 163 places, 207 transitions, 2418 flow [2024-10-24 19:13:55,237 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2316, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2418, PETRI_PLACES=163, PETRI_TRANSITIONS=207} [2024-10-24 19:13:55,237 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 117 predicate places. [2024-10-24 19:13:55,237 INFO L471 AbstractCegarLoop]: Abstraction has has 163 places, 207 transitions, 2418 flow [2024-10-24 19:13:55,238 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 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 19:13:55,238 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:13:55,238 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:13:55,241 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 (23)] Forceful destruction successful, exit code 0 [2024-10-24 19:13:55,438 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /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 19:13:55,438 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-24 19:13:55,438 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:13:55,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1657256303, now seen corresponding path program 2 times [2024-10-24 19:13:55,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:13:55,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1919229132] [2024-10-24 19:13:55,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 19:13:55,439 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 19:13:55,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:13:55,440 INFO L229 MonitoredProcess]: Starting monitored process 24 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 19:13:55,441 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 (24)] Waiting until timeout for monitored process [2024-10-24 19:13:55,513 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 19:13:55,514 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:13:55,516 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-24 19:13:55,517 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:13:55,524 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 19:13:55,532 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 19:13:55,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:13:55,590 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 19:13:55,598 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-24 19:13:55,598 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 19:13:55,766 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-24 19:13:55,766 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:14:00,115 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-24 19:14:00,115 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:14:00,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1919229132] [2024-10-24 19:14:00,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1919229132] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:14:00,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:14:00,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-24 19:14:00,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445669624] [2024-10-24 19:14:00,116 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:14:00,116 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-24 19:14:00,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:14:00,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-24 19:14:00,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=64, Unknown=1, NotChecked=0, Total=90 [2024-10-24 19:14:00,867 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-10-24 19:14:00,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 207 transitions, 2418 flow. Second operand has 10 states, 10 states have (on average 21.0) internal successors, (210), 10 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:14:00,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:14:00,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-10-24 19:14:00,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:14:02,339 INFO L124 PetriNetUnfolderBase]: 4074/8034 cut-off events. [2024-10-24 19:14:02,339 INFO L125 PetriNetUnfolderBase]: For 21890/22060 co-relation queries the response was YES. [2024-10-24 19:14:02,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26750 conditions, 8034 events. 4074/8034 cut-off events. For 21890/22060 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 58892 event pairs, 233 based on Foata normal form. 213/8149 useless extension candidates. Maximal degree in co-relation 26455. Up to 1950 conditions per place. [2024-10-24 19:14:02,405 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 282 selfloop transitions, 27 changer transitions 1/332 dead transitions. [2024-10-24 19:14:02,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 332 transitions, 3867 flow [2024-10-24 19:14:02,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-24 19:14:02,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-24 19:14:02,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 326 transitions. [2024-10-24 19:14:02,407 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6174242424242424 [2024-10-24 19:14:02,407 INFO L175 Difference]: Start difference. First operand has 163 places, 207 transitions, 2418 flow. Second operand 11 states and 326 transitions. [2024-10-24 19:14:02,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 332 transitions, 3867 flow [2024-10-24 19:14:02,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 332 transitions, 3840 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-10-24 19:14:02,449 INFO L231 Difference]: Finished difference. Result has 174 places, 208 transitions, 2471 flow [2024-10-24 19:14:02,450 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2391, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2471, PETRI_PLACES=174, PETRI_TRANSITIONS=208} [2024-10-24 19:14:02,450 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 128 predicate places. [2024-10-24 19:14:02,450 INFO L471 AbstractCegarLoop]: Abstraction has has 174 places, 208 transitions, 2471 flow [2024-10-24 19:14:02,450 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 21.0) internal successors, (210), 10 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:14:02,450 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:14:02,451 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:14:02,454 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 (24)] Forceful destruction successful, exit code 0 [2024-10-24 19:14:02,651 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /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 19:14:02,651 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-24 19:14:02,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:14:02,652 INFO L85 PathProgramCache]: Analyzing trace with hash 327991413, now seen corresponding path program 3 times [2024-10-24 19:14:02,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:14:02,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [246771491] [2024-10-24 19:14:02,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 19:14:02,652 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 19:14:02,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:14:02,653 INFO L229 MonitoredProcess]: Starting monitored process 25 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 19:14:02,654 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 (25)] Waiting until timeout for monitored process [2024-10-24 19:14:02,761 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-24 19:14:02,761 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:14:02,764 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-24 19:14:02,766 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:14:02,771 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 1 [2024-10-24 19:14:02,774 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 19:14:02,840 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-10-24 19:14:02,841 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 19:14:02,858 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-24 19:14:02,858 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 19:14:03,335 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 19:14:03,335 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:14:05,350 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 19:14:05,350 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:14:05,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [246771491] [2024-10-24 19:14:05,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [246771491] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:14:05,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:14:05,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2024-10-24 19:14:05,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871184040] [2024-10-24 19:14:05,350 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:14:05,350 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-24 19:14:05,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:14:05,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-24 19:14:05,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2024-10-24 19:14:09,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-24 19:14:18,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-24 19:14:22,686 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-10-24 19:14:22,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 208 transitions, 2471 flow. Second operand has 20 states, 20 states have (on average 16.7) internal successors, (334), 20 states have internal predecessors, (334), 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 19:14:22,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:14:22,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-10-24 19:14:22,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:14:36,495 INFO L124 PetriNetUnfolderBase]: 6671/12750 cut-off events. [2024-10-24 19:14:36,496 INFO L125 PetriNetUnfolderBase]: For 33378/33519 co-relation queries the response was YES. [2024-10-24 19:14:36,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44473 conditions, 12750 events. 6671/12750 cut-off events. For 33378/33519 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 97972 event pairs, 3168 based on Foata normal form. 111/12581 useless extension candidates. Maximal degree in co-relation 44169. Up to 4803 conditions per place. [2024-10-24 19:14:36,600 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 142 selfloop transitions, 155 changer transitions 0/317 dead transitions. [2024-10-24 19:14:36,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 317 transitions, 3798 flow [2024-10-24 19:14:36,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-24 19:14:36,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-10-24 19:14:36,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 340 transitions. [2024-10-24 19:14:36,603 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-10-24 19:14:36,603 INFO L175 Difference]: Start difference. First operand has 174 places, 208 transitions, 2471 flow. Second operand 15 states and 340 transitions. [2024-10-24 19:14:36,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 317 transitions, 3798 flow [2024-10-24 19:14:36,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 317 transitions, 3699 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-10-24 19:14:36,675 INFO L231 Difference]: Finished difference. Result has 181 places, 217 transitions, 2840 flow [2024-10-24 19:14:36,675 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2420, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2840, PETRI_PLACES=181, PETRI_TRANSITIONS=217} [2024-10-24 19:14:36,675 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 135 predicate places. [2024-10-24 19:14:36,675 INFO L471 AbstractCegarLoop]: Abstraction has has 181 places, 217 transitions, 2840 flow [2024-10-24 19:14:36,675 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 16.7) internal successors, (334), 20 states have internal predecessors, (334), 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 19:14:36,675 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:14:36,676 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1] [2024-10-24 19:14:36,680 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 (25)] Forceful destruction successful, exit code 0 [2024-10-24 19:14:36,876 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /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 19:14:36,876 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-24 19:14:36,876 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:14:36,876 INFO L85 PathProgramCache]: Analyzing trace with hash -601885906, now seen corresponding path program 3 times [2024-10-24 19:14:36,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:14:36,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [922356898] [2024-10-24 19:14:36,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 19:14:36,877 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 19:14:36,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:14:36,878 INFO L229 MonitoredProcess]: Starting monitored process 26 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 19:14:36,879 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 (26)] Waiting until timeout for monitored process [2024-10-24 19:14:37,017 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-10-24 19:14:37,018 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:14:37,020 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-24 19:14:37,021 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:14:37,040 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 19:14:38,608 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 19:14:38,608 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:14:42,538 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 19:14:42,538 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:14:42,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [922356898] [2024-10-24 19:14:42,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [922356898] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:14:42,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:14:42,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2024-10-24 19:14:42,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944984486] [2024-10-24 19:14:42,539 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:14:42,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-24 19:14:42,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:14:42,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-24 19:14:42,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650