./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/chl-chromosome-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 60539e5483ee028af31550fcc6bdc40a30b35263f2407e34b5392a698998aa9c --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 19:50:47,772 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 19:50:47,823 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-11 19:50:47,827 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 19:50:47,829 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 19:50:47,852 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 19:50:47,853 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 19:50:47,853 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 19:50:47,853 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 19:50:47,854 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 19:50:47,854 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 19:50:47,854 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 19:50:47,855 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 19:50:47,856 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 19:50:47,856 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 19:50:47,856 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 19:50:47,857 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 19:50:47,857 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 19:50:47,857 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 19:50:47,857 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 19:50:47,858 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-11 19:50:47,858 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-11 19:50:47,861 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-11 19:50:47,862 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 19:50:47,862 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-11 19:50:47,862 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 19:50:47,862 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-11 19:50:47,862 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 19:50:47,862 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 19:50:47,863 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 19:50:47,863 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 19:50:47,863 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 19:50:47,863 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 19:50:47,863 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 19:50:47,863 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 19:50:47,863 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 19:50:47,864 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 19:50:47,864 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 19:50:47,864 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 19:50:47,864 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 19:50:47,864 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 19:50:47,865 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 19:50:47,865 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 60539e5483ee028af31550fcc6bdc40a30b35263f2407e34b5392a698998aa9c [2024-10-11 19:50:48,069 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 19:50:48,087 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 19:50:48,089 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 19:50:48,090 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 19:50:48,091 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 19:50:48,091 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c [2024-10-11 19:50:49,315 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 19:50:49,469 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 19:50:49,470 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c [2024-10-11 19:50:49,491 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/adba5f076/5038fae67d684c1b8c69ec0a82d7af5f/FLAG0b14f8104 [2024-10-11 19:50:49,867 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/adba5f076/5038fae67d684c1b8c69ec0a82d7af5f [2024-10-11 19:50:49,869 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 19:50:49,870 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 19:50:49,870 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 19:50:49,871 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 19:50:49,875 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 19:50:49,875 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:50:49" (1/1) ... [2024-10-11 19:50:49,876 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68de498b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:50:49, skipping insertion in model container [2024-10-11 19:50:49,876 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:50:49" (1/1) ... [2024-10-11 19:50:49,903 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 19:50:50,086 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:50:50,096 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) [2024-10-11 19:50:50,096 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1d40cf72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:50:50, skipping insertion in model container [2024-10-11 19:50:50,097 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 19:50:50,097 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-10-11 19:50:50,098 INFO L158 Benchmark]: Toolchain (without parser) took 228.05ms. Allocated memory is still 167.8MB. Free memory was 136.7MB in the beginning and 125.0MB in the end (delta: 11.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-10-11 19:50:50,099 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 167.8MB. Free memory is still 139.8MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-11 19:50:50,099 INFO L158 Benchmark]: CACSL2BoogieTranslator took 226.50ms. Allocated memory is still 167.8MB. Free memory was 136.7MB in the beginning and 125.6MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-10-11 19:50:50,100 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 167.8MB. Free memory is still 139.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 226.50ms. Allocated memory is still 167.8MB. Free memory was 136.7MB in the beginning and 125.6MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 119]: 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-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 60539e5483ee028af31550fcc6bdc40a30b35263f2407e34b5392a698998aa9c --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 19:50:51,658 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 19:50:51,719 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-10-11 19:50:51,724 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 19:50:51,724 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 19:50:51,750 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 19:50:51,751 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 19:50:51,751 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 19:50:51,752 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 19:50:51,754 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 19:50:51,755 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 19:50:51,755 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 19:50:51,755 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 19:50:51,755 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 19:50:51,756 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 19:50:51,756 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 19:50:51,756 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 19:50:51,756 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 19:50:51,756 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 19:50:51,756 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 19:50:51,757 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-11 19:50:51,758 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-11 19:50:51,758 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-11 19:50:51,758 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 19:50:51,759 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-11 19:50:51,759 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-11 19:50:51,759 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 19:50:51,759 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-11 19:50:51,759 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-11 19:50:51,759 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 19:50:51,760 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 19:50:51,760 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 19:50:51,760 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 19:50:51,761 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 19:50:51,761 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 19:50:51,761 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 19:50:51,761 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 19:50:51,762 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 19:50:51,762 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-11 19:50:51,762 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-10-11 19:50:51,762 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 19:50:51,763 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 19:50:51,763 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 19:50:51,763 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 19:50:51,763 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-11 19:50:51,763 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 60539e5483ee028af31550fcc6bdc40a30b35263f2407e34b5392a698998aa9c [2024-10-11 19:50:51,999 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 19:50:52,015 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 19:50:52,017 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 19:50:52,018 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 19:50:52,018 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 19:50:52,020 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c [2024-10-11 19:50:53,242 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 19:50:53,396 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 19:50:53,397 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c [2024-10-11 19:50:53,405 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/0360c8ec3/fb2a85820f214130bfa621cd56a62b20/FLAGd8d4dd997 [2024-10-11 19:50:53,417 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/0360c8ec3/fb2a85820f214130bfa621cd56a62b20 [2024-10-11 19:50:53,419 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 19:50:53,420 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 19:50:53,422 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 19:50:53,422 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 19:50:53,427 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 19:50:53,427 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:50:53" (1/1) ... [2024-10-11 19:50:53,428 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59501eb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:50:53, skipping insertion in model container [2024-10-11 19:50:53,428 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:50:53" (1/1) ... [2024-10-11 19:50:53,449 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 19:50:53,648 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:50:53,659 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-10-11 19:50:53,664 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 19:50:53,689 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:50:53,698 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 19:50:53,725 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:50:53,741 INFO L204 MainTranslator]: Completed translation [2024-10-11 19:50:53,742 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:50:53 WrapperNode [2024-10-11 19:50:53,742 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 19:50:53,742 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 19:50:53,743 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 19:50:53,743 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 19:50:53,747 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:50:53" (1/1) ... [2024-10-11 19:50:53,762 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:50:53" (1/1) ... [2024-10-11 19:50:53,786 INFO L138 Inliner]: procedures = 27, calls = 33, calls flagged for inlining = 18, calls inlined = 26, statements flattened = 267 [2024-10-11 19:50:53,786 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 19:50:53,787 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 19:50:53,787 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 19:50:53,787 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 19:50:53,795 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:50:53" (1/1) ... [2024-10-11 19:50:53,795 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:50:53" (1/1) ... [2024-10-11 19:50:53,800 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:50:53" (1/1) ... [2024-10-11 19:50:53,823 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-10-11 19:50:53,825 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:50:53" (1/1) ... [2024-10-11 19:50:53,825 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:50:53" (1/1) ... [2024-10-11 19:50:53,837 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:50:53" (1/1) ... [2024-10-11 19:50:53,844 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:50:53" (1/1) ... [2024-10-11 19:50:53,846 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:50:53" (1/1) ... [2024-10-11 19:50:53,847 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:50:53" (1/1) ... [2024-10-11 19:50:53,853 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 19:50:53,856 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 19:50:53,856 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 19:50:53,856 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 19:50:53,857 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:50:53" (1/1) ... [2024-10-11 19:50:53,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 19:50:53,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:50:53,880 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 19:50:53,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 19:50:53,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 19:50:53,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-11 19:50:53,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-10-11 19:50:53,911 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-10-11 19:50:53,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-10-11 19:50:53,912 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-11 19:50:53,912 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-11 19:50:53,912 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-11 19:50:53,912 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-11 19:50:53,912 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-11 19:50:53,912 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-11 19:50:53,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-11 19:50:53,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 19:50:53,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 19:50:53,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-10-11 19:50:53,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-10-11 19:50:53,914 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 19:50:54,029 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 19:50:54,030 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 19:50:54,534 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 19:50:54,534 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 19:50:54,845 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 19:50:54,845 INFO L314 CfgBuilder]: Removed 6 assume(true) statements. [2024-10-11 19:50:54,846 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:50:54 BoogieIcfgContainer [2024-10-11 19:50:54,846 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 19:50:54,849 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 19:50:54,849 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 19:50:54,851 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 19:50:54,851 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 07:50:53" (1/3) ... [2024-10-11 19:50:54,852 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c90c7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 07:50:54, skipping insertion in model container [2024-10-11 19:50:54,852 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:50:53" (2/3) ... [2024-10-11 19:50:54,852 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c90c7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 07:50:54, skipping insertion in model container [2024-10-11 19:50:54,852 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:50:54" (3/3) ... [2024-10-11 19:50:54,853 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-subst.wvr.c [2024-10-11 19:50:54,865 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 19:50:54,866 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2024-10-11 19:50:54,866 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 19:50:54,921 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-11 19:50:54,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 60 transitions, 141 flow [2024-10-11 19:50:54,970 INFO L124 PetriNetUnfolderBase]: 6/57 cut-off events. [2024-10-11 19:50:54,970 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-11 19:50:54,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 57 events. 6/57 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 135 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 42. Up to 2 conditions per place. [2024-10-11 19:50:54,974 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 60 transitions, 141 flow [2024-10-11 19:50:54,976 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 56 transitions, 130 flow [2024-10-11 19:50:54,983 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 19:50:54,991 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;@26a0707c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 19:50:54,991 INFO L334 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2024-10-11 19:50:54,993 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 19:50:54,993 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-11 19:50:54,993 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:50:54,993 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:50:54,993 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:50:54,994 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-11 19:50:54,998 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:50:54,998 INFO L85 PathProgramCache]: Analyzing trace with hash 876668, now seen corresponding path program 1 times [2024-10-11 19:50:55,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:50:55,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [482181810] [2024-10-11 19:50:55,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:50:55,015 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 [2024-10-11 19:50:55,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:50:55,017 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/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) [2024-10-11 19:50:55,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:50:55,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:50:55,094 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-11 19:50:55,096 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:50:55,134 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 [2024-10-11 19:50:55,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:50:55,150 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:50:55,151 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:50:55,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [482181810] [2024-10-11 19:50:55,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [482181810] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:50:55,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:50:55,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-11 19:50:55,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085039433] [2024-10-11 19:50:55,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:50:55,159 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:50:55,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:50:55,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:50:55,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:50:55,237 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-10-11 19:50:55,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 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) [2024-10-11 19:50:55,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:50:55,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-10-11 19:50:55,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:50:55,419 INFO L124 PetriNetUnfolderBase]: 202/455 cut-off events. [2024-10-11 19:50:55,419 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-10-11 19:50:55,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 800 conditions, 455 events. 202/455 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2234 event pairs, 124 based on Foata normal form. 1/364 useless extension candidates. Maximal degree in co-relation 684. Up to 293 conditions per place. [2024-10-11 19:50:55,424 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 27 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2024-10-11 19:50:55,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 51 transitions, 178 flow [2024-10-11 19:50:55,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:50:55,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:50:55,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 111 transitions. [2024-10-11 19:50:55,433 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-10-11 19:50:55,434 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 130 flow. Second operand 3 states and 111 transitions. [2024-10-11 19:50:55,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 51 transitions, 178 flow [2024-10-11 19:50:55,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 51 transitions, 166 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-11 19:50:55,439 INFO L231 Difference]: Finished difference. Result has 51 places, 51 transitions, 112 flow [2024-10-11 19:50:55,441 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=51, PETRI_TRANSITIONS=51} [2024-10-11 19:50:55,446 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -9 predicate places. [2024-10-11 19:50:55,446 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 51 transitions, 112 flow [2024-10-11 19:50:55,446 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 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) [2024-10-11 19:50:55,446 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:50:55,447 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:50:55,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:50:55,647 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-clean/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 [2024-10-11 19:50:55,648 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-11 19:50:55,648 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:50:55,648 INFO L85 PathProgramCache]: Analyzing trace with hash 876669, now seen corresponding path program 1 times [2024-10-11 19:50:55,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:50:55,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1274365827] [2024-10-11 19:50:55,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:50:55,649 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 [2024-10-11 19:50:55,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:50:55,651 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/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) [2024-10-11 19:50:55,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:50:55,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:50:55,698 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-11 19:50:55,699 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:50:55,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-11 19:50:55,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:50:55,735 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:50:55,735 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:50:55,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1274365827] [2024-10-11 19:50:55,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1274365827] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:50:55,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:50:55,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-11 19:50:55,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135548022] [2024-10-11 19:50:55,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:50:55,737 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:50:55,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:50:55,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:50:55,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:50:55,786 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-10-11 19:50:55,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 51 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 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) [2024-10-11 19:50:55,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:50:55,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-10-11 19:50:55,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:50:55,939 INFO L124 PetriNetUnfolderBase]: 205/464 cut-off events. [2024-10-11 19:50:55,940 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-10-11 19:50:55,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 796 conditions, 464 events. 205/464 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2271 event pairs, 124 based on Foata normal form. 0/368 useless extension candidates. Maximal degree in co-relation 746. Up to 306 conditions per place. [2024-10-11 19:50:55,955 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 34 selfloop transitions, 7 changer transitions 0/60 dead transitions. [2024-10-11 19:50:55,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 60 transitions, 214 flow [2024-10-11 19:50:55,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:50:55,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:50:55,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 122 transitions. [2024-10-11 19:50:55,959 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6777777777777778 [2024-10-11 19:50:55,959 INFO L175 Difference]: Start difference. First operand has 51 places, 51 transitions, 112 flow. Second operand 3 states and 122 transitions. [2024-10-11 19:50:55,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 60 transitions, 214 flow [2024-10-11 19:50:55,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 60 transitions, 208 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:50:55,966 INFO L231 Difference]: Finished difference. Result has 53 places, 57 transitions, 166 flow [2024-10-11 19:50:55,967 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=53, PETRI_TRANSITIONS=57} [2024-10-11 19:50:55,967 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -7 predicate places. [2024-10-11 19:50:55,967 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 57 transitions, 166 flow [2024-10-11 19:50:55,967 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 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) [2024-10-11 19:50:55,968 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:50:55,968 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-11 19:50:55,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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)] Ended with exit code 0 [2024-10-11 19:50:56,168 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-clean/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 [2024-10-11 19:50:56,168 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-11 19:50:56,169 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:50:56,169 INFO L85 PathProgramCache]: Analyzing trace with hash 842507015, now seen corresponding path program 1 times [2024-10-11 19:50:56,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:50:56,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1505010082] [2024-10-11 19:50:56,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:50:56,170 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 [2024-10-11 19:50:56,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:50:56,171 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/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) [2024-10-11 19:50:56,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:50:56,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:50:56,239 INFO L255 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-11 19:50:56,240 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:50:56,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-11 19:50:56,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:50:56,295 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:50:56,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:50:56,369 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:50:56,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1505010082] [2024-10-11 19:50:56,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1505010082] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:50:56,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:50:56,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2024-10-11 19:50:56,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906957894] [2024-10-11 19:50:56,369 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:50:56,370 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 19:50:56,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:50:56,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 19:50:56,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-11 19:50:56,575 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-10-11 19:50:56,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 57 transitions, 166 flow. Second operand has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 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) [2024-10-11 19:50:56,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:50:56,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-10-11 19:50:56,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:50:57,456 INFO L124 PetriNetUnfolderBase]: 214/491 cut-off events. [2024-10-11 19:50:57,456 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-10-11 19:50:57,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 895 conditions, 491 events. 214/491 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2459 event pairs, 124 based on Foata normal form. 0/399 useless extension candidates. Maximal degree in co-relation 746. Up to 309 conditions per place. [2024-10-11 19:50:57,459 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 43 selfloop transitions, 25 changer transitions 0/87 dead transitions. [2024-10-11 19:50:57,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 87 transitions, 410 flow [2024-10-11 19:50:57,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 19:50:57,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 19:50:57,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 233 transitions. [2024-10-11 19:50:57,461 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6472222222222223 [2024-10-11 19:50:57,461 INFO L175 Difference]: Start difference. First operand has 53 places, 57 transitions, 166 flow. Second operand 6 states and 233 transitions. [2024-10-11 19:50:57,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 87 transitions, 410 flow [2024-10-11 19:50:57,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 87 transitions, 384 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:50:57,464 INFO L231 Difference]: Finished difference. Result has 59 places, 75 transitions, 327 flow [2024-10-11 19:50:57,464 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=327, PETRI_PLACES=59, PETRI_TRANSITIONS=75} [2024-10-11 19:50:57,464 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -1 predicate places. [2024-10-11 19:50:57,465 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 75 transitions, 327 flow [2024-10-11 19:50:57,465 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 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) [2024-10-11 19:50:57,465 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:50:57,465 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:50:57,469 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:50:57,667 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate-clean/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 [2024-10-11 19:50:57,667 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-11 19:50:57,668 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:50:57,668 INFO L85 PathProgramCache]: Analyzing trace with hash 337738575, now seen corresponding path program 1 times [2024-10-11 19:50:57,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:50:57,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1673716663] [2024-10-11 19:50:57,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:50:57,669 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 [2024-10-11 19:50:57,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:50:57,670 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/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) [2024-10-11 19:50:57,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:50:57,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:50:57,725 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-11 19:50:57,726 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:50:57,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:50:57,736 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:50:57,736 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:50:57,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1673716663] [2024-10-11 19:50:57,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1673716663] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:50:57,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:50:57,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:50:57,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855419683] [2024-10-11 19:50:57,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:50:57,737 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:50:57,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:50:57,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:50:57,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:50:57,746 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 60 [2024-10-11 19:50:57,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 75 transitions, 327 flow. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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) [2024-10-11 19:50:57,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:50:57,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 60 [2024-10-11 19:50:57,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:50:57,851 INFO L124 PetriNetUnfolderBase]: 211/488 cut-off events. [2024-10-11 19:50:57,851 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2024-10-11 19:50:57,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 928 conditions, 488 events. 211/488 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2351 event pairs, 124 based on Foata normal form. 3/402 useless extension candidates. Maximal degree in co-relation 825. Up to 323 conditions per place. [2024-10-11 19:50:57,855 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 41 selfloop transitions, 12 changer transitions 0/75 dead transitions. [2024-10-11 19:50:57,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 75 transitions, 425 flow [2024-10-11 19:50:57,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:50:57,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:50:57,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2024-10-11 19:50:57,858 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6944444444444444 [2024-10-11 19:50:57,858 INFO L175 Difference]: Start difference. First operand has 59 places, 75 transitions, 327 flow. Second operand 3 states and 125 transitions. [2024-10-11 19:50:57,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 75 transitions, 425 flow [2024-10-11 19:50:57,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 75 transitions, 389 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-10-11 19:50:57,862 INFO L231 Difference]: Finished difference. Result has 60 places, 72 transitions, 301 flow [2024-10-11 19:50:57,863 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=301, PETRI_PLACES=60, PETRI_TRANSITIONS=72} [2024-10-11 19:50:57,863 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 0 predicate places. [2024-10-11 19:50:57,864 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 72 transitions, 301 flow [2024-10-11 19:50:57,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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) [2024-10-11 19:50:57,864 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:50:57,864 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-10-11 19:50:57,868 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:50:58,065 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/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 [2024-10-11 19:50:58,065 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-11 19:50:58,069 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:50:58,069 INFO L85 PathProgramCache]: Analyzing trace with hash -2084959323, now seen corresponding path program 2 times [2024-10-11 19:50:58,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:50:58,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [572014086] [2024-10-11 19:50:58,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 19:50:58,070 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 [2024-10-11 19:50:58,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:50:58,072 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/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) [2024-10-11 19:50:58,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:50:58,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 19:50:58,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:50:58,133 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-11 19:50:58,135 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:50:58,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-11 19:50:58,316 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:50:58,316 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:50:58,712 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:50:58,712 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:50:58,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [572014086] [2024-10-11 19:50:58,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [572014086] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:50:58,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:50:58,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-10-11 19:50:58,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126375231] [2024-10-11 19:50:58,712 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:50:58,713 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-11 19:50:58,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:50:58,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-11 19:50:58,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2024-10-11 19:50:59,722 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-10-11 19:50:59,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 72 transitions, 301 flow. Second operand has 14 states, 14 states have (on average 27.571428571428573) internal successors, (386), 14 states have internal predecessors, (386), 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) [2024-10-11 19:50:59,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:50:59,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-10-11 19:50:59,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:51:07,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-11 19:51:12,021 INFO L124 PetriNetUnfolderBase]: 217/530 cut-off events. [2024-10-11 19:51:12,021 INFO L125 PetriNetUnfolderBase]: For 174/174 co-relation queries the response was YES. [2024-10-11 19:51:12,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1049 conditions, 530 events. 217/530 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2382 event pairs, 124 based on Foata normal form. 30/471 useless extension candidates. Maximal degree in co-relation 836. Up to 310 conditions per place. [2024-10-11 19:51:12,024 INFO L140 encePairwiseOnDemand]: 47/60 looper letters, 44 selfloop transitions, 63 changer transitions 0/126 dead transitions. [2024-10-11 19:51:12,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 126 transitions, 720 flow [2024-10-11 19:51:12,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-11 19:51:12,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-10-11 19:51:12,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 579 transitions. [2024-10-11 19:51:12,027 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5676470588235294 [2024-10-11 19:51:12,027 INFO L175 Difference]: Start difference. First operand has 60 places, 72 transitions, 301 flow. Second operand 17 states and 579 transitions. [2024-10-11 19:51:12,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 126 transitions, 720 flow [2024-10-11 19:51:12,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 126 transitions, 688 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:51:12,031 INFO L231 Difference]: Finished difference. Result has 85 places, 111 transitions, 725 flow [2024-10-11 19:51:12,031 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=725, PETRI_PLACES=85, PETRI_TRANSITIONS=111} [2024-10-11 19:51:12,032 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 25 predicate places. [2024-10-11 19:51:12,032 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 111 transitions, 725 flow [2024-10-11 19:51:12,032 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 27.571428571428573) internal successors, (386), 14 states have internal predecessors, (386), 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) [2024-10-11 19:51:12,032 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:51:12,032 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1] [2024-10-11 19:51:12,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2024-10-11 19:51:12,235 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-clean/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 [2024-10-11 19:51:12,236 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-11 19:51:12,236 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:51:12,236 INFO L85 PathProgramCache]: Analyzing trace with hash -404000415, now seen corresponding path program 3 times [2024-10-11 19:51:12,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:51:12,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [369013556] [2024-10-11 19:51:12,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 19:51:12,237 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 [2024-10-11 19:51:12,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:51:12,238 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/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) [2024-10-11 19:51:12,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:51:12,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-10-11 19:51:12,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:51:12,388 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-11 19:51:12,389 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:51:12,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-11 19:51:12,716 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:51:12,716 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:51:13,917 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:51:13,918 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:51:13,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [369013556] [2024-10-11 19:51:13,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [369013556] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:51:13,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:51:13,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2024-10-11 19:51:13,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754966486] [2024-10-11 19:51:13,918 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:51:13,919 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-11 19:51:13,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:51:13,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-11 19:51:13,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=426, Unknown=0, NotChecked=0, Total=600 [2024-10-11 19:51:18,870 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-10-11 19:51:18,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 111 transitions, 725 flow. Second operand has 25 states, 25 states have (on average 27.84) internal successors, (696), 25 states have internal predecessors, (696), 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) [2024-10-11 19:51:18,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:51:18,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-10-11 19:51:18,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:51:19,677 INFO L124 PetriNetUnfolderBase]: 199/476 cut-off events. [2024-10-11 19:51:19,677 INFO L125 PetriNetUnfolderBase]: For 193/193 co-relation queries the response was YES. [2024-10-11 19:51:19,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 968 conditions, 476 events. 199/476 cut-off events. For 193/193 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2219 event pairs, 124 based on Foata normal form. 3/390 useless extension candidates. Maximal degree in co-relation 949. Up to 293 conditions per place. [2024-10-11 19:51:19,680 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 34 selfloop transitions, 19 changer transitions 0/72 dead transitions. [2024-10-11 19:51:19,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 72 transitions, 526 flow [2024-10-11 19:51:19,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 19:51:19,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-11 19:51:19,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 264 transitions. [2024-10-11 19:51:19,681 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-10-11 19:51:19,681 INFO L175 Difference]: Start difference. First operand has 85 places, 111 transitions, 725 flow. Second operand 8 states and 264 transitions. [2024-10-11 19:51:19,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 72 transitions, 526 flow [2024-10-11 19:51:19,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 72 transitions, 328 flow, removed 68 selfloop flow, removed 15 redundant places. [2024-10-11 19:51:19,694 INFO L231 Difference]: Finished difference. Result has 65 places, 60 transitions, 212 flow [2024-10-11 19:51:19,694 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=212, PETRI_PLACES=65, PETRI_TRANSITIONS=60} [2024-10-11 19:51:19,695 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 5 predicate places. [2024-10-11 19:51:19,695 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 60 transitions, 212 flow [2024-10-11 19:51:19,696 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 27.84) internal successors, (696), 25 states have internal predecessors, (696), 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) [2024-10-11 19:51:19,696 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:51:19,696 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:51:19,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:51:19,896 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/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 [2024-10-11 19:51:19,896 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-11 19:51:19,897 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:51:19,897 INFO L85 PathProgramCache]: Analyzing trace with hash -501029199, now seen corresponding path program 1 times [2024-10-11 19:51:19,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:51:19,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [397859606] [2024-10-11 19:51:19,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:51:19,897 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 [2024-10-11 19:51:19,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:51:19,898 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/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) [2024-10-11 19:51:19,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:51:20,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:51:20,097 INFO L255 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-11 19:51:20,099 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:51:20,102 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 [2024-10-11 19:51:20,135 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-10-11 19:51:20,136 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 [2024-10-11 19:51:20,166 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-10-11 19:51:20,166 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 [2024-10-11 19:51:20,195 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-11 19:51:20,195 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:51:20,195 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:51:20,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [397859606] [2024-10-11 19:51:20,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [397859606] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:51:20,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:51:20,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:51:20,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744311257] [2024-10-11 19:51:20,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:51:20,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:51:20,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:51:20,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:51:20,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:51:20,266 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 60 [2024-10-11 19:51:20,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 60 transitions, 212 flow. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 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) [2024-10-11 19:51:20,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:51:20,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 60 [2024-10-11 19:51:20,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:51:20,436 INFO L124 PetriNetUnfolderBase]: 340/756 cut-off events. [2024-10-11 19:51:20,436 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-10-11 19:51:20,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1368 conditions, 756 events. 340/756 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 4145 event pairs, 234 based on Foata normal form. 0/642 useless extension candidates. Maximal degree in co-relation 1359. Up to 494 conditions per place. [2024-10-11 19:51:20,440 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 40 selfloop transitions, 3 changer transitions 0/58 dead transitions. [2024-10-11 19:51:20,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 58 transitions, 294 flow [2024-10-11 19:51:20,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 19:51:20,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 19:51:20,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-10-11 19:51:20,441 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4766666666666667 [2024-10-11 19:51:20,441 INFO L175 Difference]: Start difference. First operand has 65 places, 60 transitions, 212 flow. Second operand 5 states and 143 transitions. [2024-10-11 19:51:20,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 58 transitions, 294 flow [2024-10-11 19:51:20,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 58 transitions, 256 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-10-11 19:51:20,444 INFO L231 Difference]: Finished difference. Result has 60 places, 58 transitions, 176 flow [2024-10-11 19:51:20,444 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=176, PETRI_PLACES=60, PETRI_TRANSITIONS=58} [2024-10-11 19:51:20,445 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 0 predicate places. [2024-10-11 19:51:20,445 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 58 transitions, 176 flow [2024-10-11 19:51:20,445 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 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) [2024-10-11 19:51:20,446 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:51:20,446 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:51:20,452 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2024-10-11 19:51:20,646 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-clean/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 [2024-10-11 19:51:20,646 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-11 19:51:20,647 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:51:20,647 INFO L85 PathProgramCache]: Analyzing trace with hash -501029198, now seen corresponding path program 1 times [2024-10-11 19:51:20,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:51:20,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1711762377] [2024-10-11 19:51:20,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:51:20,647 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 [2024-10-11 19:51:20,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:51:20,650 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/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) [2024-10-11 19:51:20,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:51:20,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:51:20,864 INFO L255 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-11 19:51:20,866 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:51:20,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-11 19:51:20,877 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 [2024-10-11 19:51:20,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 19:51:20,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-11 19:51:20,971 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-11 19:51:20,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-10-11 19:51:21,025 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-10-11 19:51:21,025 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 12 treesize of output 14 [2024-10-11 19:51:21,097 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-11 19:51:21,098 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:51:21,098 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:51:21,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1711762377] [2024-10-11 19:51:21,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1711762377] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:51:21,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:51:21,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:51:21,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095982207] [2024-10-11 19:51:21,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:51:21,098 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 19:51:21,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:51:21,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 19:51:21,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-11 19:51:21,185 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 60 [2024-10-11 19:51:21,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 58 transitions, 176 flow. Second operand has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 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) [2024-10-11 19:51:21,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:51:21,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 60 [2024-10-11 19:51:21,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:51:21,371 INFO L124 PetriNetUnfolderBase]: 397/899 cut-off events. [2024-10-11 19:51:21,371 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-10-11 19:51:21,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1587 conditions, 899 events. 397/899 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5005 event pairs, 169 based on Foata normal form. 26/787 useless extension candidates. Maximal degree in co-relation 1578. Up to 377 conditions per place. [2024-10-11 19:51:21,375 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 54 selfloop transitions, 5 changer transitions 0/75 dead transitions. [2024-10-11 19:51:21,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 75 transitions, 333 flow [2024-10-11 19:51:21,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 19:51:21,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 19:51:21,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 198 transitions. [2024-10-11 19:51:21,376 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-10-11 19:51:21,376 INFO L175 Difference]: Start difference. First operand has 60 places, 58 transitions, 176 flow. Second operand 6 states and 198 transitions. [2024-10-11 19:51:21,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 75 transitions, 333 flow [2024-10-11 19:51:21,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 75 transitions, 328 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-11 19:51:21,377 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 189 flow [2024-10-11 19:51:21,378 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=189, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2024-10-11 19:51:21,378 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 3 predicate places. [2024-10-11 19:51:21,378 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 189 flow [2024-10-11 19:51:21,378 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 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) [2024-10-11 19:51:21,378 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:51:21,378 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:51:21,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:51:21,578 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/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 [2024-10-11 19:51:21,579 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-11 19:51:21,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:51:21,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1647964879, now seen corresponding path program 1 times [2024-10-11 19:51:21,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:51:21,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2058321918] [2024-10-11 19:51:21,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:51:21,580 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 [2024-10-11 19:51:21,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:51:21,583 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/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) [2024-10-11 19:51:21,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:51:21,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:51:21,799 INFO L255 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-11 19:51:21,801 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:51:21,804 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 [2024-10-11 19:51:21,841 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-10-11 19:51:21,841 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 [2024-10-11 19:51:21,866 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-11 19:51:21,866 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:51:21,866 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:51:21,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2058321918] [2024-10-11 19:51:21,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2058321918] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:51:21,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:51:21,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:51:21,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884256723] [2024-10-11 19:51:21,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:51:21,867 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:51:21,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:51:21,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:51:21,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:51:21,910 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 60 [2024-10-11 19:51:21,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 189 flow. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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) [2024-10-11 19:51:21,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:51:21,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 60 [2024-10-11 19:51:21,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:51:22,068 INFO L124 PetriNetUnfolderBase]: 427/843 cut-off events. [2024-10-11 19:51:22,070 INFO L125 PetriNetUnfolderBase]: For 176/203 co-relation queries the response was YES. [2024-10-11 19:51:22,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1701 conditions, 843 events. 427/843 cut-off events. For 176/203 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4107 event pairs, 299 based on Foata normal form. 58/830 useless extension candidates. Maximal degree in co-relation 1691. Up to 624 conditions per place. [2024-10-11 19:51:22,074 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 40 selfloop transitions, 3 changer transitions 0/57 dead transitions. [2024-10-11 19:51:22,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 57 transitions, 271 flow [2024-10-11 19:51:22,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 19:51:22,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 19:51:22,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-10-11 19:51:22,075 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49 [2024-10-11 19:51:22,075 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 189 flow. Second operand 5 states and 147 transitions. [2024-10-11 19:51:22,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 57 transitions, 271 flow [2024-10-11 19:51:22,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 57 transitions, 263 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-11 19:51:22,077 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 183 flow [2024-10-11 19:51:22,077 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=183, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2024-10-11 19:51:22,077 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 1 predicate places. [2024-10-11 19:51:22,077 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 183 flow [2024-10-11 19:51:22,077 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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) [2024-10-11 19:51:22,077 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:51:22,077 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:51:22,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2024-10-11 19:51:22,278 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-clean/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 [2024-10-11 19:51:22,278 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-11 19:51:22,278 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:51:22,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1647964880, now seen corresponding path program 1 times [2024-10-11 19:51:22,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:51:22,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [887272534] [2024-10-11 19:51:22,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:51:22,279 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 [2024-10-11 19:51:22,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:51:22,282 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/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) [2024-10-11 19:51:22,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:51:22,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:51:22,538 INFO L255 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-11 19:51:22,540 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:51:22,548 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 [2024-10-11 19:51:22,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-11 19:51:22,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 19:51:22,619 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 [2024-10-11 19:51:22,625 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-11 19:51:22,625 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 [2024-10-11 19:51:22,697 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-11 19:51:22,697 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:51:22,697 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:51:22,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [887272534] [2024-10-11 19:51:22,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [887272534] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:51:22,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:51:22,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 19:51:22,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997993626] [2024-10-11 19:51:22,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:51:22,698 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 19:51:22,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:51:22,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 19:51:22,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-11 19:51:22,790 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 60 [2024-10-11 19:51:22,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 183 flow. Second operand has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 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) [2024-10-11 19:51:22,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:51:22,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 60 [2024-10-11 19:51:22,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:51:22,982 INFO L124 PetriNetUnfolderBase]: 397/822 cut-off events. [2024-10-11 19:51:22,982 INFO L125 PetriNetUnfolderBase]: For 83/106 co-relation queries the response was YES. [2024-10-11 19:51:22,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1591 conditions, 822 events. 397/822 cut-off events. For 83/106 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 4086 event pairs, 169 based on Foata normal form. 26/760 useless extension candidates. Maximal degree in co-relation 1581. Up to 377 conditions per place. [2024-10-11 19:51:22,985 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 54 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2024-10-11 19:51:22,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 73 transitions, 338 flow [2024-10-11 19:51:22,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 19:51:22,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 19:51:22,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 198 transitions. [2024-10-11 19:51:22,987 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-10-11 19:51:22,987 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 183 flow. Second operand 6 states and 198 transitions. [2024-10-11 19:51:22,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 73 transitions, 338 flow [2024-10-11 19:51:22,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 73 transitions, 333 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-11 19:51:22,988 INFO L231 Difference]: Finished difference. Result has 64 places, 57 transitions, 192 flow [2024-10-11 19:51:22,988 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=192, PETRI_PLACES=64, PETRI_TRANSITIONS=57} [2024-10-11 19:51:22,989 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 4 predicate places. [2024-10-11 19:51:22,990 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 57 transitions, 192 flow [2024-10-11 19:51:22,990 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 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) [2024-10-11 19:51:22,990 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:51:22,990 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:51:22,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:51:23,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-clean/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 [2024-10-11 19:51:23,191 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-11 19:51:23,192 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:51:23,192 INFO L85 PathProgramCache]: Analyzing trace with hash -498865560, now seen corresponding path program 1 times [2024-10-11 19:51:23,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:51:23,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1067972732] [2024-10-11 19:51:23,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:51:23,193 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 [2024-10-11 19:51:23,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:51:23,194 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-clean/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) [2024-10-11 19:51:23,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:51:23,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:51:23,403 INFO L255 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-11 19:51:23,405 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:51:23,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-11 19:51:23,414 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 [2024-10-11 19:51:23,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 19:51:23,478 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 [2024-10-11 19:51:23,487 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-11 19:51:23,488 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 [2024-10-11 19:51:23,547 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-10-11 19:51:23,547 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 12 treesize of output 14 [2024-10-11 19:51:23,614 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-11 19:51:23,615 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:51:23,615 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:51:23,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1067972732] [2024-10-11 19:51:23,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1067972732] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:51:23,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:51:23,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:51:23,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463422033] [2024-10-11 19:51:23,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:51:23,616 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 19:51:23,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:51:23,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 19:51:23,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-11 19:51:23,708 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 60 [2024-10-11 19:51:23,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 57 transitions, 192 flow. Second operand has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 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) [2024-10-11 19:51:23,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:51:23,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 60 [2024-10-11 19:51:23,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:51:23,928 INFO L124 PetriNetUnfolderBase]: 665/1395 cut-off events. [2024-10-11 19:51:23,929 INFO L125 PetriNetUnfolderBase]: For 527/572 co-relation queries the response was YES. [2024-10-11 19:51:23,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2792 conditions, 1395 events. 665/1395 cut-off events. For 527/572 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 8558 event pairs, 315 based on Foata normal form. 46/1273 useless extension candidates. Maximal degree in co-relation 2781. Up to 650 conditions per place. [2024-10-11 19:51:23,946 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 54 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2024-10-11 19:51:23,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 73 transitions, 358 flow [2024-10-11 19:51:23,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 19:51:23,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 19:51:23,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 196 transitions. [2024-10-11 19:51:23,947 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5444444444444444 [2024-10-11 19:51:23,947 INFO L175 Difference]: Start difference. First operand has 64 places, 57 transitions, 192 flow. Second operand 6 states and 196 transitions. [2024-10-11 19:51:23,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 73 transitions, 358 flow [2024-10-11 19:51:23,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 73 transitions, 344 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-10-11 19:51:23,949 INFO L231 Difference]: Finished difference. Result has 65 places, 58 transitions, 200 flow [2024-10-11 19:51:23,949 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=200, PETRI_PLACES=65, PETRI_TRANSITIONS=58} [2024-10-11 19:51:23,950 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 5 predicate places. [2024-10-11 19:51:23,950 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 58 transitions, 200 flow [2024-10-11 19:51:23,950 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 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) [2024-10-11 19:51:23,950 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:51:23,950 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:51:23,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:51:24,150 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-clean/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 [2024-10-11 19:51:24,151 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-11 19:51:24,151 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:51:24,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1715037667, now seen corresponding path program 1 times [2024-10-11 19:51:24,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:51:24,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [483720016] [2024-10-11 19:51:24,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:51:24,152 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 [2024-10-11 19:51:24,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:51:24,153 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-clean/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) [2024-10-11 19:51:24,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:51:24,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:51:24,317 INFO L255 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-11 19:51:24,319 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:51:24,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-11 19:51:24,391 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-11 19:51:24,391 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:51:24,392 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:51:24,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [483720016] [2024-10-11 19:51:24,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [483720016] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:51:24,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:51:24,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 19:51:24,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537151232] [2024-10-11 19:51:24,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:51:24,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 19:51:24,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:51:24,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 19:51:24,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-11 19:51:24,465 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-10-11 19:51:24,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 58 transitions, 200 flow. Second operand has 5 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 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) [2024-10-11 19:51:24,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:51:24,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-10-11 19:51:24,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:51:24,657 INFO L124 PetriNetUnfolderBase]: 665/1343 cut-off events. [2024-10-11 19:51:24,657 INFO L125 PetriNetUnfolderBase]: For 498/566 co-relation queries the response was YES. [2024-10-11 19:51:24,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2833 conditions, 1343 events. 665/1343 cut-off events. For 498/566 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7827 event pairs, 315 based on Foata normal form. 46/1267 useless extension candidates. Maximal degree in co-relation 2821. Up to 650 conditions per place. [2024-10-11 19:51:24,662 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 55 selfloop transitions, 4 changer transitions 0/73 dead transitions. [2024-10-11 19:51:24,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 73 transitions, 360 flow [2024-10-11 19:51:24,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 19:51:24,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 19:51:24,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 186 transitions. [2024-10-11 19:51:24,664 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-10-11 19:51:24,664 INFO L175 Difference]: Start difference. First operand has 65 places, 58 transitions, 200 flow. Second operand 5 states and 186 transitions. [2024-10-11 19:51:24,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 73 transitions, 360 flow [2024-10-11 19:51:24,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 73 transitions, 352 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-11 19:51:24,665 INFO L231 Difference]: Finished difference. Result has 66 places, 58 transitions, 204 flow [2024-10-11 19:51:24,665 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=204, PETRI_PLACES=66, PETRI_TRANSITIONS=58} [2024-10-11 19:51:24,666 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 6 predicate places. [2024-10-11 19:51:24,666 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 58 transitions, 204 flow [2024-10-11 19:51:24,666 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 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) [2024-10-11 19:51:24,666 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:51:24,666 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:51:24,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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)] Forceful destruction successful, exit code 0 [2024-10-11 19:51:24,866 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-clean/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 [2024-10-11 19:51:24,866 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-11 19:51:24,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:51:24,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1148653099, now seen corresponding path program 1 times [2024-10-11 19:51:24,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:51:24,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1735929651] [2024-10-11 19:51:24,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:51:24,867 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 [2024-10-11 19:51:24,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:51:24,868 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-clean/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) [2024-10-11 19:51:24,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:51:25,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:51:25,106 INFO L255 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-11 19:51:25,110 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:51:25,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-11 19:51:25,124 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 [2024-10-11 19:51:25,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 19:51:25,190 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 [2024-10-11 19:51:25,201 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-11 19:51:25,201 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 [2024-10-11 19:51:25,253 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-10-11 19:51:25,253 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 12 treesize of output 14 [2024-10-11 19:51:25,338 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-11 19:51:25,338 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:51:25,835 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-11 19:51:25,835 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:51:25,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1735929651] [2024-10-11 19:51:25,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1735929651] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:51:25,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:51:25,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2024-10-11 19:51:25,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188265960] [2024-10-11 19:51:25,836 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:51:25,836 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-11 19:51:25,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:51:25,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-11 19:51:25,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-10-11 19:51:26,900 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-10-11 19:51:26,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 204 flow. Second operand has 11 states, 11 states have (on average 26.727272727272727) internal successors, (294), 11 states have internal predecessors, (294), 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) [2024-10-11 19:51:26,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:51:26,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-10-11 19:51:26,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:51:27,600 INFO L124 PetriNetUnfolderBase]: 1733/3151 cut-off events. [2024-10-11 19:51:27,600 INFO L125 PetriNetUnfolderBase]: For 1724/1819 co-relation queries the response was YES. [2024-10-11 19:51:27,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7191 conditions, 3151 events. 1733/3151 cut-off events. For 1724/1819 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 18698 event pairs, 285 based on Foata normal form. 126/3166 useless extension candidates. Maximal degree in co-relation 7178. Up to 577 conditions per place. [2024-10-11 19:51:27,613 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 110 selfloop transitions, 9 changer transitions 0/132 dead transitions. [2024-10-11 19:51:27,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 132 transitions, 662 flow [2024-10-11 19:51:27,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 19:51:27,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-11 19:51:27,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 321 transitions. [2024-10-11 19:51:27,616 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5944444444444444 [2024-10-11 19:51:27,616 INFO L175 Difference]: Start difference. First operand has 66 places, 58 transitions, 204 flow. Second operand 9 states and 321 transitions. [2024-10-11 19:51:27,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 132 transitions, 662 flow [2024-10-11 19:51:27,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 132 transitions, 638 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-11 19:51:27,618 INFO L231 Difference]: Finished difference. Result has 74 places, 61 transitions, 243 flow [2024-10-11 19:51:27,618 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=243, PETRI_PLACES=74, PETRI_TRANSITIONS=61} [2024-10-11 19:51:27,619 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 14 predicate places. [2024-10-11 19:51:27,619 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 61 transitions, 243 flow [2024-10-11 19:51:27,619 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 26.727272727272727) internal successors, (294), 11 states have internal predecessors, (294), 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) [2024-10-11 19:51:27,619 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:51:27,619 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:51:27,628 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:51:27,820 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-clean/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 [2024-10-11 19:51:27,820 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-11 19:51:27,820 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:51:27,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1715037666, now seen corresponding path program 1 times [2024-10-11 19:51:27,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:51:27,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1710173650] [2024-10-11 19:51:27,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:51:27,821 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 [2024-10-11 19:51:27,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:51:27,823 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-clean/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) [2024-10-11 19:51:27,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:51:28,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:51:28,013 INFO L255 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-11 19:51:28,015 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:51:28,019 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 [2024-10-11 19:51:28,041 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-11 19:51:28,041 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:51:28,042 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:51:28,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1710173650] [2024-10-11 19:51:28,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1710173650] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:51:28,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:51:28,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:51:28,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153933224] [2024-10-11 19:51:28,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:51:28,042 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:51:28,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:51:28,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:51:28,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:51:28,080 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-10-11 19:51:28,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 61 transitions, 243 flow. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 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) [2024-10-11 19:51:28,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:51:28,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-10-11 19:51:28,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:51:28,362 INFO L124 PetriNetUnfolderBase]: 1207/2423 cut-off events. [2024-10-11 19:51:28,362 INFO L125 PetriNetUnfolderBase]: For 1838/1925 co-relation queries the response was YES. [2024-10-11 19:51:28,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5474 conditions, 2423 events. 1207/2423 cut-off events. For 1838/1925 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 15423 event pairs, 958 based on Foata normal form. 140/2354 useless extension candidates. Maximal degree in co-relation 5457. Up to 1794 conditions per place. [2024-10-11 19:51:28,372 INFO L140 encePairwiseOnDemand]: 56/60 looper letters, 43 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2024-10-11 19:51:28,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 59 transitions, 329 flow [2024-10-11 19:51:28,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:51:28,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:51:28,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-10-11 19:51:28,376 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5291666666666667 [2024-10-11 19:51:28,376 INFO L175 Difference]: Start difference. First operand has 74 places, 61 transitions, 243 flow. Second operand 4 states and 127 transitions. [2024-10-11 19:51:28,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 59 transitions, 329 flow [2024-10-11 19:51:28,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 59 transitions, 316 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-10-11 19:51:28,378 INFO L231 Difference]: Finished difference. Result has 71 places, 59 transitions, 230 flow [2024-10-11 19:51:28,378 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=230, PETRI_PLACES=71, PETRI_TRANSITIONS=59} [2024-10-11 19:51:28,379 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 11 predicate places. [2024-10-11 19:51:28,379 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 59 transitions, 230 flow [2024-10-11 19:51:28,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 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) [2024-10-11 19:51:28,379 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:51:28,379 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:51:28,387 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:51:28,579 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-clean/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 [2024-10-11 19:51:28,579 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-11 19:51:28,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:51:28,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1248506867, now seen corresponding path program 1 times [2024-10-11 19:51:28,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:51:28,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1597159514] [2024-10-11 19:51:28,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:51:28,580 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 [2024-10-11 19:51:28,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:51:28,581 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-clean/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) [2024-10-11 19:51:28,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:51:28,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:51:28,840 INFO L255 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-11 19:51:28,842 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:51:28,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-11 19:51:28,920 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-10-11 19:51:28,921 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 12 treesize of output 14 [2024-10-11 19:51:29,056 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-11 19:51:29,057 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:51:29,307 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-11 19:51:29,307 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:51:29,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1597159514] [2024-10-11 19:51:29,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1597159514] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:51:29,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:51:29,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2024-10-11 19:51:29,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753582882] [2024-10-11 19:51:29,307 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:51:29,308 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 19:51:29,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:51:29,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 19:51:29,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-10-11 19:51:29,977 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-10-11 19:51:29,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 59 transitions, 230 flow. Second operand has 10 states, 10 states have (on average 30.5) internal successors, (305), 10 states have internal predecessors, (305), 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) [2024-10-11 19:51:29,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:51:29,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-10-11 19:51:29,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:51:30,624 INFO L124 PetriNetUnfolderBase]: 1345/2513 cut-off events. [2024-10-11 19:51:30,624 INFO L125 PetriNetUnfolderBase]: For 1511/1599 co-relation queries the response was YES. [2024-10-11 19:51:30,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5870 conditions, 2513 events. 1345/2513 cut-off events. For 1511/1599 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 14425 event pairs, 301 based on Foata normal form. 126/2555 useless extension candidates. Maximal degree in co-relation 5853. Up to 619 conditions per place. [2024-10-11 19:51:30,637 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 107 selfloop transitions, 8 changer transitions 0/128 dead transitions. [2024-10-11 19:51:30,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 128 transitions, 654 flow [2024-10-11 19:51:30,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 19:51:30,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-11 19:51:30,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 353 transitions. [2024-10-11 19:51:30,639 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6537037037037037 [2024-10-11 19:51:30,639 INFO L175 Difference]: Start difference. First operand has 71 places, 59 transitions, 230 flow. Second operand 9 states and 353 transitions. [2024-10-11 19:51:30,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 128 transitions, 654 flow [2024-10-11 19:51:30,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 128 transitions, 651 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:51:30,643 INFO L231 Difference]: Finished difference. Result has 80 places, 60 transitions, 263 flow [2024-10-11 19:51:30,643 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=263, PETRI_PLACES=80, PETRI_TRANSITIONS=60} [2024-10-11 19:51:30,643 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 20 predicate places. [2024-10-11 19:51:30,644 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 60 transitions, 263 flow [2024-10-11 19:51:30,644 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 30.5) internal successors, (305), 10 states have internal predecessors, (305), 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) [2024-10-11 19:51:30,644 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:51:30,644 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:51:30,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:51:30,844 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-clean/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 [2024-10-11 19:51:30,845 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-11 19:51:30,845 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:51:30,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1592009336, now seen corresponding path program 1 times [2024-10-11 19:51:30,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:51:30,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1575890193] [2024-10-11 19:51:30,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:51:30,845 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 [2024-10-11 19:51:30,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:51:30,846 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-clean/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) [2024-10-11 19:51:30,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:51:31,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:51:31,074 INFO L255 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-11 19:51:31,076 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:51:31,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-11 19:51:31,088 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 [2024-10-11 19:51:31,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 19:51:31,150 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 [2024-10-11 19:51:31,160 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-11 19:51:31,161 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 [2024-10-11 19:51:31,225 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-11 19:51:31,226 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:51:31,226 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:51:31,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1575890193] [2024-10-11 19:51:31,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1575890193] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:51:31,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:51:31,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 19:51:31,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232062048] [2024-10-11 19:51:31,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:51:31,226 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 19:51:31,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:51:31,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 19:51:31,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-11 19:51:31,339 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 60 [2024-10-11 19:51:31,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 60 transitions, 263 flow. Second operand has 5 states, 5 states have (on average 28.4) internal successors, (142), 5 states have internal predecessors, (142), 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) [2024-10-11 19:51:31,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:51:31,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 60 [2024-10-11 19:51:31,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:51:31,787 INFO L124 PetriNetUnfolderBase]: 2253/4258 cut-off events. [2024-10-11 19:51:31,787 INFO L125 PetriNetUnfolderBase]: For 4852/5117 co-relation queries the response was YES. [2024-10-11 19:51:31,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10095 conditions, 4258 events. 2253/4258 cut-off events. For 4852/5117 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 29065 event pairs, 1256 based on Foata normal form. 145/4324 useless extension candidates. Maximal degree in co-relation 10075. Up to 2316 conditions per place. [2024-10-11 19:51:31,804 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 60 selfloop transitions, 5 changer transitions 0/78 dead transitions. [2024-10-11 19:51:31,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 78 transitions, 484 flow [2024-10-11 19:51:31,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 19:51:31,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 19:51:31,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 194 transitions. [2024-10-11 19:51:31,805 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5388888888888889 [2024-10-11 19:51:31,805 INFO L175 Difference]: Start difference. First operand has 80 places, 60 transitions, 263 flow. Second operand 6 states and 194 transitions. [2024-10-11 19:51:31,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 78 transitions, 484 flow [2024-10-11 19:51:31,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 78 transitions, 462 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-10-11 19:51:31,808 INFO L231 Difference]: Finished difference. Result has 79 places, 61 transitions, 267 flow [2024-10-11 19:51:31,808 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=267, PETRI_PLACES=79, PETRI_TRANSITIONS=61} [2024-10-11 19:51:31,809 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 19 predicate places. [2024-10-11 19:51:31,809 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 61 transitions, 267 flow [2024-10-11 19:51:31,810 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.4) internal successors, (142), 5 states have internal predecessors, (142), 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) [2024-10-11 19:51:31,810 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:51:31,810 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:51:31,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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)] Ended with exit code 0 [2024-10-11 19:51:32,010 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-clean/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 [2024-10-11 19:51:32,011 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-11 19:51:32,011 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:51:32,011 INFO L85 PathProgramCache]: Analyzing trace with hash 2107650012, now seen corresponding path program 1 times [2024-10-11 19:51:32,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:51:32,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1671823277] [2024-10-11 19:51:32,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:51:32,012 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 [2024-10-11 19:51:32,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:51:32,012 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-clean/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) [2024-10-11 19:51:32,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:51:32,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:51:32,221 INFO L255 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-11 19:51:32,223 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:51:32,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-11 19:51:32,308 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-11 19:51:32,308 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:51:32,308 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:51:32,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1671823277] [2024-10-11 19:51:32,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1671823277] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:51:32,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:51:32,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 19:51:32,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057470055] [2024-10-11 19:51:32,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:51:32,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 19:51:32,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:51:32,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 19:51:32,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-11 19:51:32,391 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-10-11 19:51:32,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 61 transitions, 267 flow. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 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) [2024-10-11 19:51:32,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:51:32,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-10-11 19:51:32,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:51:32,854 INFO L124 PetriNetUnfolderBase]: 2253/3948 cut-off events. [2024-10-11 19:51:32,854 INFO L125 PetriNetUnfolderBase]: For 4310/4585 co-relation queries the response was YES. [2024-10-11 19:51:32,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10133 conditions, 3948 events. 2253/3948 cut-off events. For 4310/4585 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 24891 event pairs, 1256 based on Foata normal form. 145/3879 useless extension candidates. Maximal degree in co-relation 10112. Up to 2316 conditions per place. [2024-10-11 19:51:32,869 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 61 selfloop transitions, 4 changer transitions 0/78 dead transitions. [2024-10-11 19:51:32,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 78 transitions, 478 flow [2024-10-11 19:51:32,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 19:51:32,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 19:51:32,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 184 transitions. [2024-10-11 19:51:32,871 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6133333333333333 [2024-10-11 19:51:32,871 INFO L175 Difference]: Start difference. First operand has 79 places, 61 transitions, 267 flow. Second operand 5 states and 184 transitions. [2024-10-11 19:51:32,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 78 transitions, 478 flow [2024-10-11 19:51:32,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 78 transitions, 470 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-11 19:51:32,877 INFO L231 Difference]: Finished difference. Result has 80 places, 61 transitions, 271 flow [2024-10-11 19:51:32,877 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=271, PETRI_PLACES=80, PETRI_TRANSITIONS=61} [2024-10-11 19:51:32,877 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 20 predicate places. [2024-10-11 19:51:32,878 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 61 transitions, 271 flow [2024-10-11 19:51:32,878 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 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) [2024-10-11 19:51:32,878 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:51:32,878 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:51:32,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:51:33,078 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-clean/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 [2024-10-11 19:51:33,079 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-11 19:51:33,079 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:51:33,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1116213944, now seen corresponding path program 1 times [2024-10-11 19:51:33,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:51:33,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [942747007] [2024-10-11 19:51:33,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:51:33,079 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 [2024-10-11 19:51:33,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:51:33,080 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-clean/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) [2024-10-11 19:51:33,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:51:33,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:51:33,345 INFO L255 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-11 19:51:33,347 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:51:33,350 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 [2024-10-11 19:51:33,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-11 19:51:33,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 19:51:33,408 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 [2024-10-11 19:51:33,414 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-11 19:51:33,414 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 [2024-10-11 19:51:33,457 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-10-11 19:51:33,457 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 12 treesize of output 14 [2024-10-11 19:51:33,526 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-11 19:51:33,526 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:51:33,971 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-11 19:51:33,971 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:51:33,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [942747007] [2024-10-11 19:51:33,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [942747007] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:51:33,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:51:33,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2024-10-11 19:51:33,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144478445] [2024-10-11 19:51:33,973 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:51:33,973 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-11 19:51:33,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:51:33,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-11 19:51:33,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-10-11 19:51:35,086 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-10-11 19:51:35,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 61 transitions, 271 flow. Second operand has 11 states, 11 states have (on average 27.09090909090909) internal successors, (298), 11 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) [2024-10-11 19:51:35,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:51:35,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-10-11 19:51:35,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:51:36,531 INFO L124 PetriNetUnfolderBase]: 6052/10424 cut-off events. [2024-10-11 19:51:36,531 INFO L125 PetriNetUnfolderBase]: For 13095/13780 co-relation queries the response was YES. [2024-10-11 19:51:36,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27471 conditions, 10424 events. 6052/10424 cut-off events. For 13095/13780 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 73687 event pairs, 1204 based on Foata normal form. 471/10735 useless extension candidates. Maximal degree in co-relation 27449. Up to 2063 conditions per place. [2024-10-11 19:51:36,577 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 122 selfloop transitions, 9 changer transitions 0/143 dead transitions. [2024-10-11 19:51:36,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 143 transitions, 909 flow [2024-10-11 19:51:36,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 19:51:36,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-11 19:51:36,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 313 transitions. [2024-10-11 19:51:36,580 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5796296296296296 [2024-10-11 19:51:36,580 INFO L175 Difference]: Start difference. First operand has 80 places, 61 transitions, 271 flow. Second operand 9 states and 313 transitions. [2024-10-11 19:51:36,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 143 transitions, 909 flow [2024-10-11 19:51:36,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 143 transitions, 885 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-11 19:51:36,591 INFO L231 Difference]: Finished difference. Result has 88 places, 64 transitions, 310 flow [2024-10-11 19:51:36,592 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=310, PETRI_PLACES=88, PETRI_TRANSITIONS=64} [2024-10-11 19:51:36,592 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 28 predicate places. [2024-10-11 19:51:36,592 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 64 transitions, 310 flow [2024-10-11 19:51:36,593 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 27.09090909090909) internal successors, (298), 11 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) [2024-10-11 19:51:36,593 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:51:36,593 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:51:36,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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)] Ended with exit code 0 [2024-10-11 19:51:36,793 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-clean/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 [2024-10-11 19:51:36,793 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-11 19:51:36,794 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:51:36,794 INFO L85 PathProgramCache]: Analyzing trace with hash -242893053, now seen corresponding path program 1 times [2024-10-11 19:51:36,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:51:36,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [521526541] [2024-10-11 19:51:36,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:51:36,794 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 [2024-10-11 19:51:36,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:51:36,795 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-clean/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) [2024-10-11 19:51:36,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:51:36,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:51:36,988 INFO L255 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-11 19:51:36,990 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:51:36,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-11 19:51:37,072 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-11 19:51:37,073 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:51:37,240 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-11 19:51:37,240 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:51:37,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [521526541] [2024-10-11 19:51:37,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [521526541] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:51:37,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:51:37,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2024-10-11 19:51:37,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363295392] [2024-10-11 19:51:37,241 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:51:37,241 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 19:51:37,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:51:37,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 19:51:37,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-10-11 19:51:37,742 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-10-11 19:51:37,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 64 transitions, 310 flow. Second operand has 10 states, 10 states have (on average 30.6) internal successors, (306), 10 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) [2024-10-11 19:51:37,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:51:37,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-10-11 19:51:37,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:51:39,080 INFO L124 PetriNetUnfolderBase]: 4576/8323 cut-off events. [2024-10-11 19:51:39,080 INFO L125 PetriNetUnfolderBase]: For 12977/13576 co-relation queries the response was YES. [2024-10-11 19:51:39,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23124 conditions, 8323 events. 4576/8323 cut-off events. For 12977/13576 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 60129 event pairs, 1204 based on Foata normal form. 471/8534 useless extension candidates. Maximal degree in co-relation 23098. Up to 2220 conditions per place. [2024-10-11 19:51:39,113 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 120 selfloop transitions, 7 changer transitions 0/141 dead transitions. [2024-10-11 19:51:39,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 141 transitions, 916 flow [2024-10-11 19:51:39,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 19:51:39,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-11 19:51:39,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 317 transitions. [2024-10-11 19:51:39,114 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6604166666666667 [2024-10-11 19:51:39,114 INFO L175 Difference]: Start difference. First operand has 88 places, 64 transitions, 310 flow. Second operand 8 states and 317 transitions. [2024-10-11 19:51:39,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 141 transitions, 916 flow [2024-10-11 19:51:39,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 141 transitions, 901 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-10-11 19:51:39,133 INFO L231 Difference]: Finished difference. Result has 94 places, 65 transitions, 331 flow [2024-10-11 19:51:39,133 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=331, PETRI_PLACES=94, PETRI_TRANSITIONS=65} [2024-10-11 19:51:39,134 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 34 predicate places. [2024-10-11 19:51:39,134 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 65 transitions, 331 flow [2024-10-11 19:51:39,134 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 30.6) internal successors, (306), 10 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) [2024-10-11 19:51:39,135 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:51:39,135 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:51:39,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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)] Ended with exit code 0 [2024-10-11 19:51:39,335 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate-clean/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 [2024-10-11 19:51:39,335 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-11 19:51:39,336 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:51:39,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1772872159, now seen corresponding path program 1 times [2024-10-11 19:51:39,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:51:39,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1584193553] [2024-10-11 19:51:39,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:51:39,336 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 [2024-10-11 19:51:39,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:51:39,337 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-clean/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) [2024-10-11 19:51:39,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:51:39,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:51:39,626 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-11 19:51:39,627 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:51:39,634 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 [2024-10-11 19:51:39,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-11 19:51:39,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 19:51:39,690 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 [2024-10-11 19:51:39,697 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-11 19:51:39,697 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 [2024-10-11 19:51:39,767 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-11 19:51:39,767 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:51:40,053 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-11 19:51:40,053 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:51:40,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1584193553] [2024-10-11 19:51:40,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1584193553] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:51:40,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:51:40,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2024-10-11 19:51:40,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337098716] [2024-10-11 19:51:40,053 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:51:40,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 19:51:40,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:51:40,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 19:51:40,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-10-11 19:51:40,706 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-10-11 19:51:40,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 65 transitions, 331 flow. Second operand has 10 states, 10 states have (on average 27.5) internal successors, (275), 10 states have internal predecessors, (275), 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) [2024-10-11 19:51:40,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:51:40,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-10-11 19:51:40,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:51:43,356 INFO L124 PetriNetUnfolderBase]: 12347/20823 cut-off events. [2024-10-11 19:51:43,356 INFO L125 PetriNetUnfolderBase]: For 40842/42357 co-relation queries the response was YES. [2024-10-11 19:51:43,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59373 conditions, 20823 events. 12347/20823 cut-off events. For 40842/42357 co-relation queries the response was YES. Maximal size of possible extension queue 669. Compared 160695 event pairs, 2903 based on Foata normal form. 966/21427 useless extension candidates. Maximal degree in co-relation 59344. Up to 4748 conditions per place. [2024-10-11 19:51:43,460 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 129 selfloop transitions, 9 changer transitions 0/151 dead transitions. [2024-10-11 19:51:43,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 151 transitions, 1115 flow [2024-10-11 19:51:43,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 19:51:43,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-11 19:51:43,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 305 transitions. [2024-10-11 19:51:43,462 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5648148148148148 [2024-10-11 19:51:43,462 INFO L175 Difference]: Start difference. First operand has 94 places, 65 transitions, 331 flow. Second operand 9 states and 305 transitions. [2024-10-11 19:51:43,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 151 transitions, 1115 flow [2024-10-11 19:51:43,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 151 transitions, 1071 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-11 19:51:43,485 INFO L231 Difference]: Finished difference. Result has 100 places, 68 transitions, 366 flow [2024-10-11 19:51:43,485 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=366, PETRI_PLACES=100, PETRI_TRANSITIONS=68} [2024-10-11 19:51:43,486 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 40 predicate places. [2024-10-11 19:51:43,486 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 68 transitions, 366 flow [2024-10-11 19:51:43,486 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.5) internal successors, (275), 10 states have internal predecessors, (275), 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) [2024-10-11 19:51:43,486 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:51:43,486 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:51:43,494 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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)] Ended with exit code 0 [2024-10-11 19:51:43,686 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-clean/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 [2024-10-11 19:51:43,686 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-11 19:51:43,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:51:43,687 INFO L85 PathProgramCache]: Analyzing trace with hash 875538771, now seen corresponding path program 1 times [2024-10-11 19:51:43,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:51:43,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1614249194] [2024-10-11 19:51:43,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:51:43,687 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 [2024-10-11 19:51:43,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:51:43,689 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-clean/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) [2024-10-11 19:51:43,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:51:43,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:51:43,888 INFO L255 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-11 19:51:43,889 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:51:43,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-11 19:51:43,974 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-11 19:51:43,974 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:51:44,151 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-11 19:51:44,151 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:51:44,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1614249194] [2024-10-11 19:51:44,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1614249194] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:51:44,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:51:44,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2024-10-11 19:51:44,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598685943] [2024-10-11 19:51:44,152 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:51:44,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 19:51:44,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:51:44,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 19:51:44,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-10-11 19:51:44,719 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-10-11 19:51:44,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 68 transitions, 366 flow. Second operand has 10 states, 10 states have (on average 31.0) internal successors, (310), 10 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) [2024-10-11 19:51:44,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:51:44,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-10-11 19:51:44,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:51:47,296 INFO L124 PetriNetUnfolderBase]: 9387/17502 cut-off events. [2024-10-11 19:51:47,297 INFO L125 PetriNetUnfolderBase]: For 35933/37081 co-relation queries the response was YES. [2024-10-11 19:51:47,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52103 conditions, 17502 events. 9387/17502 cut-off events. For 35933/37081 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 145079 event pairs, 2903 based on Foata normal form. 966/18238 useless extension candidates. Maximal degree in co-relation 52070. Up to 5070 conditions per place. [2024-10-11 19:51:47,426 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 127 selfloop transitions, 7 changer transitions 0/149 dead transitions. [2024-10-11 19:51:47,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 149 transitions, 1102 flow [2024-10-11 19:51:47,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 19:51:47,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-11 19:51:47,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 309 transitions. [2024-10-11 19:51:47,428 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.64375 [2024-10-11 19:51:47,428 INFO L175 Difference]: Start difference. First operand has 100 places, 68 transitions, 366 flow. Second operand 8 states and 309 transitions. [2024-10-11 19:51:47,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 149 transitions, 1102 flow [2024-10-11 19:51:47,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 149 transitions, 1087 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-10-11 19:51:47,509 INFO L231 Difference]: Finished difference. Result has 106 places, 69 transitions, 387 flow [2024-10-11 19:51:47,509 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=387, PETRI_PLACES=106, PETRI_TRANSITIONS=69} [2024-10-11 19:51:47,510 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 46 predicate places. [2024-10-11 19:51:47,510 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 69 transitions, 387 flow [2024-10-11 19:51:47,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 31.0) internal successors, (310), 10 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) [2024-10-11 19:51:47,510 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:51:47,510 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:51:47,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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)] Ended with exit code 0 [2024-10-11 19:51:47,710 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-clean/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 [2024-10-11 19:51:47,711 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-11 19:51:47,711 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:51:47,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1637851378, now seen corresponding path program 2 times [2024-10-11 19:51:47,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:51:47,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1213917869] [2024-10-11 19:51:47,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 19:51:47,712 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 [2024-10-11 19:51:47,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:51:47,713 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-clean/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) [2024-10-11 19:51:47,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:51:47,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 19:51:47,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:51:47,996 INFO L255 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-11 19:51:47,998 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:51:48,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-11 19:51:48,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-11 19:51:48,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 19:51:48,072 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 [2024-10-11 19:51:48,080 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-11 19:51:48,080 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 [2024-10-11 19:51:48,125 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-10-11 19:51:48,126 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 12 treesize of output 14 [2024-10-11 19:51:48,271 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-11 19:51:48,271 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:51:49,075 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-11 19:51:49,075 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:51:49,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1213917869] [2024-10-11 19:51:49,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1213917869] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:51:49,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:51:49,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 16 [2024-10-11 19:51:49,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606979452] [2024-10-11 19:51:49,076 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:51:49,076 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-11 19:51:49,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:51:49,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-11 19:51:49,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2024-10-11 19:51:54,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-11 19:51:56,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-11 19:51:58,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-11 19:51:58,723 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 60 [2024-10-11 19:51:58,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 69 transitions, 387 flow. Second operand has 18 states, 18 states have (on average 24.88888888888889) internal successors, (448), 18 states have internal predecessors, (448), 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) [2024-10-11 19:51:58,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:51:58,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 60 [2024-10-11 19:51:58,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:52:06,849 INFO L124 PetriNetUnfolderBase]: 32563/49236 cut-off events. [2024-10-11 19:52:06,849 INFO L125 PetriNetUnfolderBase]: For 137916/142257 co-relation queries the response was YES. [2024-10-11 19:52:07,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165558 conditions, 49236 events. 32563/49236 cut-off events. For 137916/142257 co-relation queries the response was YES. Maximal size of possible extension queue 978. Compared 355118 event pairs, 3030 based on Foata normal form. 1596/47326 useless extension candidates. Maximal degree in co-relation 165522. Up to 7206 conditions per place. [2024-10-11 19:52:07,281 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 396 selfloop transitions, 20 changer transitions 0/428 dead transitions. [2024-10-11 19:52:07,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 428 transitions, 3257 flow [2024-10-11 19:52:07,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-11 19:52:07,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-10-11 19:52:07,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 722 transitions. [2024-10-11 19:52:07,283 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6016666666666667 [2024-10-11 19:52:07,283 INFO L175 Difference]: Start difference. First operand has 106 places, 69 transitions, 387 flow. Second operand 20 states and 722 transitions. [2024-10-11 19:52:07,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 428 transitions, 3257 flow [2024-10-11 19:52:07,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 428 transitions, 3125 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-11 19:52:07,415 INFO L231 Difference]: Finished difference. Result has 131 places, 80 transitions, 522 flow [2024-10-11 19:52:07,415 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=522, PETRI_PLACES=131, PETRI_TRANSITIONS=80} [2024-10-11 19:52:07,416 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 71 predicate places. [2024-10-11 19:52:07,416 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 80 transitions, 522 flow [2024-10-11 19:52:07,416 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 24.88888888888889) internal successors, (448), 18 states have internal predecessors, (448), 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) [2024-10-11 19:52:07,416 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:52:07,416 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:52:07,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:52:07,617 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-clean/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 [2024-10-11 19:52:07,617 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-11 19:52:07,617 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:52:07,617 INFO L85 PathProgramCache]: Analyzing trace with hash -968751051, now seen corresponding path program 1 times [2024-10-11 19:52:07,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:52:07,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [546341490] [2024-10-11 19:52:07,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:52:07,618 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 [2024-10-11 19:52:07,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:52:07,619 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-clean/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) [2024-10-11 19:52:07,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:52:07,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:52:07,817 INFO L255 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-11 19:52:07,819 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:52:07,833 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-11 19:52:07,833 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:52:07,833 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:52:07,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [546341490] [2024-10-11 19:52:07,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [546341490] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:52:07,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:52:07,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 19:52:07,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186765070] [2024-10-11 19:52:07,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:52:07,833 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:52:07,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:52:07,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:52:07,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:52:07,852 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 60 [2024-10-11 19:52:07,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 80 transitions, 522 flow. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 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) [2024-10-11 19:52:07,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:52:07,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 60 [2024-10-11 19:52:07,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:52:12,827 INFO L124 PetriNetUnfolderBase]: 18527/36892 cut-off events. [2024-10-11 19:52:12,827 INFO L125 PetriNetUnfolderBase]: For 100487/103916 co-relation queries the response was YES. [2024-10-11 19:52:13,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115905 conditions, 36892 events. 18527/36892 cut-off events. For 100487/103916 co-relation queries the response was YES. Maximal size of possible extension queue 821. Compared 349140 event pairs, 1790 based on Foata normal form. 220/36852 useless extension candidates. Maximal degree in co-relation 115857. Up to 23485 conditions per place. [2024-10-11 19:52:13,122 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 90 selfloop transitions, 5 changer transitions 0/117 dead transitions. [2024-10-11 19:52:13,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 117 transitions, 1001 flow [2024-10-11 19:52:13,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:52:13,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:52:13,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 162 transitions. [2024-10-11 19:52:13,124 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.675 [2024-10-11 19:52:13,124 INFO L175 Difference]: Start difference. First operand has 131 places, 80 transitions, 522 flow. Second operand 4 states and 162 transitions. [2024-10-11 19:52:13,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 117 transitions, 1001 flow [2024-10-11 19:52:13,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 117 transitions, 978 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-10-11 19:52:13,662 INFO L231 Difference]: Finished difference. Result has 129 places, 82 transitions, 549 flow [2024-10-11 19:52:13,662 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=509, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=549, PETRI_PLACES=129, PETRI_TRANSITIONS=82} [2024-10-11 19:52:13,663 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 69 predicate places. [2024-10-11 19:52:13,663 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 82 transitions, 549 flow [2024-10-11 19:52:13,663 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 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) [2024-10-11 19:52:13,663 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:52:13,663 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:52:13,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:52:13,863 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-clean/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 [2024-10-11 19:52:13,863 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-11 19:52:13,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:52:13,864 INFO L85 PathProgramCache]: Analyzing trace with hash -32911847, now seen corresponding path program 2 times [2024-10-11 19:52:13,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:52:13,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [946483184] [2024-10-11 19:52:13,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 19:52:13,864 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 [2024-10-11 19:52:13,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:52:13,865 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-clean/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) [2024-10-11 19:52:13,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:52:13,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-11 19:52:13,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:52:13,977 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-11 19:52:13,978 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:52:14,013 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-11 19:52:14,013 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:52:14,013 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:52:14,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [946483184] [2024-10-11 19:52:14,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [946483184] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:52:14,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:52:14,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 19:52:14,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866128466] [2024-10-11 19:52:14,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:52:14,014 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:52:14,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:52:14,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:52:14,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:52:14,028 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 60 [2024-10-11 19:52:14,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 82 transitions, 549 flow. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 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) [2024-10-11 19:52:14,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:52:14,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 60 [2024-10-11 19:52:14,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:52:19,406 INFO L124 PetriNetUnfolderBase]: 18490/35065 cut-off events. [2024-10-11 19:52:19,406 INFO L125 PetriNetUnfolderBase]: For 108617/111653 co-relation queries the response was YES. [2024-10-11 19:52:19,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116219 conditions, 35065 events. 18490/35065 cut-off events. For 108617/111653 co-relation queries the response was YES. Maximal size of possible extension queue 803. Compared 318937 event pairs, 14414 based on Foata normal form. 38/34219 useless extension candidates. Maximal degree in co-relation 116169. Up to 24477 conditions per place. [2024-10-11 19:52:19,822 INFO L140 encePairwiseOnDemand]: 56/60 looper letters, 97 selfloop transitions, 5 changer transitions 0/124 dead transitions. [2024-10-11 19:52:19,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 124 transitions, 988 flow [2024-10-11 19:52:19,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:52:19,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:52:19,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 173 transitions. [2024-10-11 19:52:19,823 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7208333333333333 [2024-10-11 19:52:19,823 INFO L175 Difference]: Start difference. First operand has 129 places, 82 transitions, 549 flow. Second operand 4 states and 173 transitions. [2024-10-11 19:52:19,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 124 transitions, 988 flow [2024-10-11 19:52:20,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 124 transitions, 984 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 19:52:20,340 INFO L231 Difference]: Finished difference. Result has 133 places, 83 transitions, 570 flow [2024-10-11 19:52:20,340 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=546, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=570, PETRI_PLACES=133, PETRI_TRANSITIONS=83} [2024-10-11 19:52:20,341 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 73 predicate places. [2024-10-11 19:52:20,341 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 83 transitions, 570 flow [2024-10-11 19:52:20,341 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 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) [2024-10-11 19:52:20,341 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:52:20,341 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:52:20,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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)] Ended with exit code 0 [2024-10-11 19:52:20,542 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-clean/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 [2024-10-11 19:52:20,543 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-11 19:52:20,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:52:20,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1430512679, now seen corresponding path program 3 times [2024-10-11 19:52:20,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:52:20,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [667470979] [2024-10-11 19:52:20,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 19:52:20,544 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 [2024-10-11 19:52:20,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:52:20,545 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-clean/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) [2024-10-11 19:52:20,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:52:20,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-10-11 19:52:20,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:52:20,659 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-11 19:52:20,660 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:52:20,690 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-11 19:52:20,690 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:52:20,690 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:52:20,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [667470979] [2024-10-11 19:52:20,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [667470979] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:52:20,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:52:20,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 19:52:20,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665161265] [2024-10-11 19:52:20,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:52:20,690 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:52:20,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:52:20,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:52:20,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:52:20,703 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-10-11 19:52:20,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 83 transitions, 570 flow. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 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) [2024-10-11 19:52:20,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:52:20,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-10-11 19:52:20,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand