./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/unroll-5.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/unroll-5.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya --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 624ca078114fa3c35bb1960efece3c50cba0d03b97522c4936fd5f6e5d783f29 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 05:56:56,566 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 05:56:56,629 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 05:56:56,633 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 05:56:56,633 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 05:56:56,655 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 05:56:56,656 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 05:56:56,657 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 05:56:56,657 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 05:56:56,658 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 05:56:56,658 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 05:56:56,659 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 05:56:56,660 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 05:56:56,660 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 05:56:56,661 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 05:56:56,661 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 05:56:56,662 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 05:56:56,662 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 05:56:56,663 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 05:56:56,663 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 05:56:56,663 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 05:56:56,664 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 05:56:56,664 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 05:56:56,665 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 05:56:56,665 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 05:56:56,665 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 05:56:56,666 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 05:56:56,666 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 05:56:56,667 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 05:56:56,667 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 05:56:56,667 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 05:56:56,668 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 05:56:56,668 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:56:56,668 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 05:56:56,668 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 05:56:56,669 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 05:56:56,669 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 05:56:56,669 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 05:56:56,669 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 05:56:56,669 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 05:56:56,669 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 05:56:56,670 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 624ca078114fa3c35bb1960efece3c50cba0d03b97522c4936fd5f6e5d783f29 [2023-11-29 05:56:56,878 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 05:56:56,900 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 05:56:56,903 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 05:56:56,904 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 05:56:56,904 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 05:56:56,906 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/unroll-5.wvr.c [2023-11-29 05:56:59,665 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 05:56:59,861 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 05:56:59,862 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/sv-benchmarks/c/weaver/unroll-5.wvr.c [2023-11-29 05:56:59,871 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/data/08bf66421/c2dd2548e3ac41c1a03eaccd7bfc8cff/FLAG5c00d6d8a [2023-11-29 05:56:59,885 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/data/08bf66421/c2dd2548e3ac41c1a03eaccd7bfc8cff [2023-11-29 05:56:59,887 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 05:56:59,889 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 05:56:59,890 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 05:56:59,890 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 05:56:59,896 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 05:56:59,896 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:56:59" (1/1) ... [2023-11-29 05:56:59,897 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@724f5184 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:56:59, skipping insertion in model container [2023-11-29 05:56:59,897 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:56:59" (1/1) ... [2023-11-29 05:56:59,924 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:57:00,096 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:57:00,108 ERROR L324 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) [2023-11-29 05:57:00,108 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7b019467 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:57:00, skipping insertion in model container [2023-11-29 05:57:00,108 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 05:57:00,109 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-29 05:57:00,111 INFO L158 Benchmark]: Toolchain (without parser) took 220.76ms. Allocated memory is still 163.6MB. Free memory was 131.8MB in the beginning and 121.8MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-29 05:57:00,111 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 111.1MB. Free memory was 67.7MB in the beginning and 67.6MB in the end (delta: 139.8kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 05:57:00,112 INFO L158 Benchmark]: CACSL2BoogieTranslator took 218.44ms. Allocated memory is still 163.6MB. Free memory was 131.8MB in the beginning and 122.1MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-29 05:57:00,113 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 111.1MB. Free memory was 67.7MB in the beginning and 67.6MB in the end (delta: 139.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 218.44ms. Allocated memory is still 163.6MB. Free memory was 131.8MB in the beginning and 122.1MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 106]: 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: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/unroll-5.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya --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 624ca078114fa3c35bb1960efece3c50cba0d03b97522c4936fd5f6e5d783f29 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 05:57:01,875 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 05:57:01,943 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-29 05:57:01,949 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 05:57:01,950 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 05:57:01,977 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 05:57:01,978 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 05:57:01,978 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 05:57:01,979 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 05:57:01,980 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 05:57:01,980 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 05:57:01,981 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 05:57:01,981 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 05:57:01,982 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 05:57:01,982 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 05:57:01,983 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 05:57:01,983 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 05:57:01,984 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 05:57:01,984 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 05:57:01,985 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 05:57:01,986 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 05:57:01,986 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 05:57:01,987 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 05:57:01,987 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 05:57:01,987 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 05:57:01,988 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-29 05:57:01,988 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-29 05:57:01,989 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 05:57:01,989 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 05:57:01,990 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 05:57:01,990 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 05:57:01,990 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 05:57:01,991 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 05:57:01,991 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 05:57:01,991 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:57:01,991 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 05:57:01,992 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 05:57:01,992 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-29 05:57:01,992 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-29 05:57:01,992 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 05:57:01,992 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 05:57:01,993 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 05:57:01,993 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 05:57:01,993 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-29 05:57:01,993 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 624ca078114fa3c35bb1960efece3c50cba0d03b97522c4936fd5f6e5d783f29 [2023-11-29 05:57:02,285 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 05:57:02,303 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 05:57:02,305 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 05:57:02,306 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 05:57:02,307 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 05:57:02,308 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/unroll-5.wvr.c [2023-11-29 05:57:05,149 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 05:57:05,363 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 05:57:05,364 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/sv-benchmarks/c/weaver/unroll-5.wvr.c [2023-11-29 05:57:05,371 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/data/2597fb505/d0e6f2e3af9743d4827732ac4a19c9ed/FLAG44bbbf5b3 [2023-11-29 05:57:05,383 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/data/2597fb505/d0e6f2e3af9743d4827732ac4a19c9ed [2023-11-29 05:57:05,386 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 05:57:05,387 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 05:57:05,389 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 05:57:05,389 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 05:57:05,393 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 05:57:05,394 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:57:05" (1/1) ... [2023-11-29 05:57:05,394 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@230c5775 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:57:05, skipping insertion in model container [2023-11-29 05:57:05,395 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:57:05" (1/1) ... [2023-11-29 05:57:05,416 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:57:05,573 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:57:05,587 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-29 05:57:05,592 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:57:05,613 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:57:05,618 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 05:57:05,644 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:57:05,660 INFO L206 MainTranslator]: Completed translation [2023-11-29 05:57:05,660 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:57:05 WrapperNode [2023-11-29 05:57:05,661 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 05:57:05,662 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 05:57:05,662 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 05:57:05,670 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 05:57:05,677 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:57:05" (1/1) ... [2023-11-29 05:57:05,689 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:57:05" (1/1) ... [2023-11-29 05:57:05,718 INFO L138 Inliner]: procedures = 26, calls = 39, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 169 [2023-11-29 05:57:05,718 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 05:57:05,719 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 05:57:05,719 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 05:57:05,720 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 05:57:05,729 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:57:05" (1/1) ... [2023-11-29 05:57:05,729 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:57:05" (1/1) ... [2023-11-29 05:57:05,734 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:57:05" (1/1) ... [2023-11-29 05:57:05,752 INFO L175 MemorySlicer]: Split 13 memory accesses to 4 slices as follows [2, 7, 2, 2]. 54 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2023-11-29 05:57:05,753 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:57:05" (1/1) ... [2023-11-29 05:57:05,753 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:57:05" (1/1) ... [2023-11-29 05:57:05,767 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:57:05" (1/1) ... [2023-11-29 05:57:05,772 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:57:05" (1/1) ... [2023-11-29 05:57:05,775 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:57:05" (1/1) ... [2023-11-29 05:57:05,777 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:57:05" (1/1) ... [2023-11-29 05:57:05,782 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 05:57:05,783 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 05:57:05,784 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 05:57:05,784 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 05:57:05,785 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:57:05" (1/1) ... [2023-11-29 05:57:05,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:57:05,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:57:05,814 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 05:57:05,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 05:57:05,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 05:57:05,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-29 05:57:05,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-11-29 05:57:05,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-11-29 05:57:05,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2023-11-29 05:57:05,854 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 05:57:05,854 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-11-29 05:57:05,854 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-11-29 05:57:05,854 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2023-11-29 05:57:05,855 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2023-11-29 05:57:05,855 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 05:57:05,855 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 05:57:05,855 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 05:57:05,855 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 05:57:05,855 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 05:57:05,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 05:57:05,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 05:57:05,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 05:57:05,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-11-29 05:57:05,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-11-29 05:57:05,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2023-11-29 05:57:05,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2023-11-29 05:57:05,859 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 05:57:05,984 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 05:57:05,986 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 05:57:06,507 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 05:57:06,837 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 05:57:06,837 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 05:57:06,837 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:57:06 BoogieIcfgContainer [2023-11-29 05:57:06,837 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 05:57:06,840 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 05:57:06,840 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 05:57:06,843 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 05:57:06,843 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 05:57:05" (1/3) ... [2023-11-29 05:57:06,844 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3815ea03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:57:06, skipping insertion in model container [2023-11-29 05:57:06,844 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:57:05" (2/3) ... [2023-11-29 05:57:06,844 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3815ea03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:57:06, skipping insertion in model container [2023-11-29 05:57:06,844 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:57:06" (3/3) ... [2023-11-29 05:57:06,846 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-5.wvr.c [2023-11-29 05:57:06,865 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 05:57:06,865 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2023-11-29 05:57:06,865 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 05:57:06,954 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 05:57:06,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 60 places, 56 transitions, 126 flow [2023-11-29 05:57:07,021 INFO L124 PetriNetUnfolderBase]: 3/54 cut-off events. [2023-11-29 05:57:07,022 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 05:57:07,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 54 events. 3/54 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 110 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 35. Up to 2 conditions per place. [2023-11-29 05:57:07,025 INFO L82 GeneralOperation]: Start removeDead. Operand has 60 places, 56 transitions, 126 flow [2023-11-29 05:57:07,029 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 53 transitions, 118 flow [2023-11-29 05:57:07,039 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 05:57:07,046 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@4e504ec3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 05:57:07,046 INFO L358 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2023-11-29 05:57:07,050 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 05:57:07,050 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-29 05:57:07,050 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 05:57:07,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:57:07,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 05:57:07,051 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 05:57:07,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:57:07,056 INFO L85 PathProgramCache]: Analyzing trace with hash 549272, now seen corresponding path program 1 times [2023-11-29 05:57:07,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:57:07,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [231663166] [2023-11-29 05:57:07,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:57:07,069 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 [2023-11-29 05:57:07,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:57:07,071 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 05:57:07,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:57:07,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:57:07,154 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 05:57:07,158 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:57:07,230 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 [2023-11-29 05:57:07,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:07,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 05:57:07,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:07,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 05:57:07,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:07,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 05:57:07,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:07,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 05:57:07,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:07,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 05:57:07,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:57:07,307 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:57:07,308 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:57:07,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [231663166] [2023-11-29 05:57:07,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [231663166] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:57:07,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:57:07,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 05:57:07,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755763086] [2023-11-29 05:57:07,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:57:07,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:57:07,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:57:07,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:57:07,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:57:07,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 56 [2023-11-29 05:57:07,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 118 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) [2023-11-29 05:57:07,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:57:07,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 56 [2023-11-29 05:57:07,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:57:07,653 INFO L124 PetriNetUnfolderBase]: 114/335 cut-off events. [2023-11-29 05:57:07,653 INFO L125 PetriNetUnfolderBase]: For 35/38 co-relation queries the response was YES. [2023-11-29 05:57:07,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 557 conditions, 335 events. 114/335 cut-off events. For 35/38 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1782 event pairs, 86 based on Foata normal form. 1/233 useless extension candidates. Maximal degree in co-relation 484. Up to 197 conditions per place. [2023-11-29 05:57:07,661 INFO L140 encePairwiseOnDemand]: 52/56 looper letters, 21 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2023-11-29 05:57:07,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 50 transitions, 158 flow [2023-11-29 05:57:07,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:57:07,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:57:07,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 115 transitions. [2023-11-29 05:57:07,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6845238095238095 [2023-11-29 05:57:07,675 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 115 transitions. [2023-11-29 05:57:07,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 115 transitions. [2023-11-29 05:57:07,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:57:07,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 115 transitions. [2023-11-29 05:57:07,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 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) [2023-11-29 05:57:07,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 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) [2023-11-29 05:57:07,683 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 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) [2023-11-29 05:57:07,685 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 118 flow. Second operand 3 states and 115 transitions. [2023-11-29 05:57:07,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 50 transitions, 158 flow [2023-11-29 05:57:07,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 50 transitions, 150 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 05:57:07,692 INFO L231 Difference]: Finished difference. Result has 52 places, 50 transitions, 108 flow [2023-11-29 05:57:07,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=52, PETRI_TRANSITIONS=50} [2023-11-29 05:57:07,697 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -5 predicate places. [2023-11-29 05:57:07,698 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 50 transitions, 108 flow [2023-11-29 05:57:07,698 INFO L496 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) [2023-11-29 05:57:07,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:57:07,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 05:57:07,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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)] Forceful destruction successful, exit code 0 [2023-11-29 05:57:07,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:57:07,899 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 05:57:07,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:57:07,900 INFO L85 PathProgramCache]: Analyzing trace with hash 549295, now seen corresponding path program 1 times [2023-11-29 05:57:07,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:57:07,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [921603104] [2023-11-29 05:57:07,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:57:07,901 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 [2023-11-29 05:57:07,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:57:07,902 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 05:57:07,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:57:07,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:57:07,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 05:57:07,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:57:07,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:57:07,994 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:57:07,994 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:57:07,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [921603104] [2023-11-29 05:57:07,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [921603104] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:57:07,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:57:07,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:57:07,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776562323] [2023-11-29 05:57:07,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:57:07,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:57:07,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:57:07,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:57:07,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:57:08,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 56 [2023-11-29 05:57:08,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 50 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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) [2023-11-29 05:57:08,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:57:08,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 56 [2023-11-29 05:57:08,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:57:08,210 INFO L124 PetriNetUnfolderBase]: 114/338 cut-off events. [2023-11-29 05:57:08,210 INFO L125 PetriNetUnfolderBase]: For 9/12 co-relation queries the response was YES. [2023-11-29 05:57:08,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 549 conditions, 338 events. 114/338 cut-off events. For 9/12 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1777 event pairs, 86 based on Foata normal form. 1/237 useless extension candidates. Maximal degree in co-relation 530. Up to 200 conditions per place. [2023-11-29 05:57:08,215 INFO L140 encePairwiseOnDemand]: 53/56 looper letters, 23 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2023-11-29 05:57:08,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 52 transitions, 162 flow [2023-11-29 05:57:08,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:57:08,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:57:08,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 119 transitions. [2023-11-29 05:57:08,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7083333333333334 [2023-11-29 05:57:08,217 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 119 transitions. [2023-11-29 05:57:08,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 119 transitions. [2023-11-29 05:57:08,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:57:08,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 119 transitions. [2023-11-29 05:57:08,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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) [2023-11-29 05:57:08,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 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) [2023-11-29 05:57:08,221 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 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) [2023-11-29 05:57:08,221 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 108 flow. Second operand 3 states and 119 transitions. [2023-11-29 05:57:08,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 52 transitions, 162 flow [2023-11-29 05:57:08,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 52 transitions, 158 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:57:08,225 INFO L231 Difference]: Finished difference. Result has 53 places, 51 transitions, 116 flow [2023-11-29 05:57:08,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=53, PETRI_TRANSITIONS=51} [2023-11-29 05:57:08,226 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -4 predicate places. [2023-11-29 05:57:08,226 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 51 transitions, 116 flow [2023-11-29 05:57:08,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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) [2023-11-29 05:57:08,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:57:08,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 05:57:08,229 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:57:08,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:57:08,428 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 05:57:08,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:57:08,428 INFO L85 PathProgramCache]: Analyzing trace with hash 549273, now seen corresponding path program 1 times [2023-11-29 05:57:08,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:57:08,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1775988205] [2023-11-29 05:57:08,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:57:08,429 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 [2023-11-29 05:57:08,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:57:08,430 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 05:57:08,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:57:08,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:57:08,481 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 05:57:08,482 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:57:08,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-29 05:57:08,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:08,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 05:57:08,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:08,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:57:08,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:08,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 05:57:08,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:08,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 05:57:08,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:08,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:57:08,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:57:08,655 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:57:08,655 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:57:08,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1775988205] [2023-11-29 05:57:08,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1775988205] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:57:08,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:57:08,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:57:08,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557757201] [2023-11-29 05:57:08,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:57:08,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:57:08,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:57:08,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:57:08,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:57:08,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 56 [2023-11-29 05:57:08,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 51 transitions, 116 flow. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 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) [2023-11-29 05:57:08,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:57:08,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 56 [2023-11-29 05:57:08,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:57:09,226 INFO L124 PetriNetUnfolderBase]: 114/337 cut-off events. [2023-11-29 05:57:09,226 INFO L125 PetriNetUnfolderBase]: For 9/12 co-relation queries the response was YES. [2023-11-29 05:57:09,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 553 conditions, 337 events. 114/337 cut-off events. For 9/12 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1778 event pairs, 86 based on Foata normal form. 1/236 useless extension candidates. Maximal degree in co-relation 540. Up to 201 conditions per place. [2023-11-29 05:57:09,230 INFO L140 encePairwiseOnDemand]: 53/56 looper letters, 24 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2023-11-29 05:57:09,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 52 transitions, 170 flow [2023-11-29 05:57:09,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:57:09,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:57:09,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 117 transitions. [2023-11-29 05:57:09,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6964285714285714 [2023-11-29 05:57:09,233 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 117 transitions. [2023-11-29 05:57:09,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 117 transitions. [2023-11-29 05:57:09,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:57:09,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 117 transitions. [2023-11-29 05:57:09,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 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) [2023-11-29 05:57:09,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 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) [2023-11-29 05:57:09,236 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 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) [2023-11-29 05:57:09,236 INFO L175 Difference]: Start difference. First operand has 53 places, 51 transitions, 116 flow. Second operand 3 states and 117 transitions. [2023-11-29 05:57:09,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 52 transitions, 170 flow [2023-11-29 05:57:09,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 52 transitions, 168 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 05:57:09,238 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 122 flow [2023-11-29 05:57:09,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=52, 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=122, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2023-11-29 05:57:09,239 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -2 predicate places. [2023-11-29 05:57:09,239 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 122 flow [2023-11-29 05:57:09,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 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) [2023-11-29 05:57:09,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:57:09,240 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-29 05:57:09,242 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:57:09,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:57:09,441 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 05:57:09,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:57:09,441 INFO L85 PathProgramCache]: Analyzing trace with hash 527869193, now seen corresponding path program 1 times [2023-11-29 05:57:09,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:57:09,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [529532215] [2023-11-29 05:57:09,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:57:09,442 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 [2023-11-29 05:57:09,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:57:09,443 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 05:57:09,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:57:09,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:57:09,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 05:57:09,524 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:57:09,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-29 05:57:09,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:09,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 05:57:09,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:09,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 05:57:09,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:09,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:57:09,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:09,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:57:09,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:09,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 05:57:09,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:57:09,765 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:57:10,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:57:10,178 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:57:10,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [529532215] [2023-11-29 05:57:10,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [529532215] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:57:10,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:57:10,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-29 05:57:10,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857667790] [2023-11-29 05:57:10,179 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:57:10,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 05:57:10,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:57:10,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 05:57:10,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-29 05:57:10,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 56 [2023-11-29 05:57:10,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 122 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) [2023-11-29 05:57:10,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:57:10,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 56 [2023-11-29 05:57:10,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:57:11,472 INFO L124 PetriNetUnfolderBase]: 117/346 cut-off events. [2023-11-29 05:57:11,473 INFO L125 PetriNetUnfolderBase]: For 10/13 co-relation queries the response was YES. [2023-11-29 05:57:11,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 581 conditions, 346 events. 117/346 cut-off events. For 10/13 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1813 event pairs, 86 based on Foata normal form. 3/247 useless extension candidates. Maximal degree in co-relation 565. Up to 204 conditions per place. [2023-11-29 05:57:11,476 INFO L140 encePairwiseOnDemand]: 51/56 looper letters, 24 selfloop transitions, 11 changer transitions 0/61 dead transitions. [2023-11-29 05:57:11,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 61 transitions, 224 flow [2023-11-29 05:57:11,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:57:11,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 05:57:11,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 308 transitions. [2023-11-29 05:57:11,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2023-11-29 05:57:11,479 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 308 transitions. [2023-11-29 05:57:11,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 308 transitions. [2023-11-29 05:57:11,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:57:11,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 308 transitions. [2023-11-29 05:57:11,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 34.22222222222222) internal successors, (308), 9 states have internal predecessors, (308), 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) [2023-11-29 05:57:11,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 56.0) internal successors, (560), 10 states have internal predecessors, (560), 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) [2023-11-29 05:57:11,485 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 56.0) internal successors, (560), 10 states have internal predecessors, (560), 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) [2023-11-29 05:57:11,485 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 122 flow. Second operand 9 states and 308 transitions. [2023-11-29 05:57:11,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 61 transitions, 224 flow [2023-11-29 05:57:11,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 61 transitions, 220 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:57:11,487 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 192 flow [2023-11-29 05:57:11,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=192, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2023-11-29 05:57:11,488 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 7 predicate places. [2023-11-29 05:57:11,488 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 192 flow [2023-11-29 05:57:11,488 INFO L496 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) [2023-11-29 05:57:11,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:57:11,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 05:57:11,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:57:11,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:57:11,689 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 05:57:11,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:57:11,690 INFO L85 PathProgramCache]: Analyzing trace with hash 527869215, now seen corresponding path program 1 times [2023-11-29 05:57:11,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:57:11,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2076934635] [2023-11-29 05:57:11,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:57:11,690 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 [2023-11-29 05:57:11,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:57:11,691 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 05:57:11,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:57:11,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:57:11,751 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 05:57:11,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:57:11,775 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 05:57:11,776 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 19 treesize of output 22 [2023-11-29 05:57:11,807 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-29 05:57:11,807 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 1 case distinctions, treesize of input 24 treesize of output 22 [2023-11-29 05:57:11,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:57:11,918 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:57:11,918 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:57:11,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2076934635] [2023-11-29 05:57:11,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2076934635] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:57:11,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:57:11,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 05:57:11,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876639180] [2023-11-29 05:57:11,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:57:11,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:57:11,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:57:11,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:57:11,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:57:12,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 56 [2023-11-29 05:57:12,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:57:12,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:57:12,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 56 [2023-11-29 05:57:12,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:57:12,187 INFO L124 PetriNetUnfolderBase]: 181/467 cut-off events. [2023-11-29 05:57:12,187 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-29 05:57:12,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 820 conditions, 467 events. 181/467 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2464 event pairs, 138 based on Foata normal form. 0/352 useless extension candidates. Maximal degree in co-relation 795. Up to 307 conditions per place. [2023-11-29 05:57:12,191 INFO L140 encePairwiseOnDemand]: 53/56 looper letters, 35 selfloop transitions, 1 changer transitions 0/59 dead transitions. [2023-11-29 05:57:12,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 59 transitions, 260 flow [2023-11-29 05:57:12,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:57:12,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:57:12,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 108 transitions. [2023-11-29 05:57:12,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2023-11-29 05:57:12,193 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 108 transitions. [2023-11-29 05:57:12,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 108 transitions. [2023-11-29 05:57:12,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:57:12,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 108 transitions. [2023-11-29 05:57:12,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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) [2023-11-29 05:57:12,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 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) [2023-11-29 05:57:12,195 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 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) [2023-11-29 05:57:12,195 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 192 flow. Second operand 3 states and 108 transitions. [2023-11-29 05:57:12,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 59 transitions, 260 flow [2023-11-29 05:57:12,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 59 transitions, 240 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-11-29 05:57:12,199 INFO L231 Difference]: Finished difference. Result has 62 places, 59 transitions, 170 flow [2023-11-29 05:57:12,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=62, PETRI_TRANSITIONS=59} [2023-11-29 05:57:12,200 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 5 predicate places. [2023-11-29 05:57:12,200 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 59 transitions, 170 flow [2023-11-29 05:57:12,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:57:12,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:57:12,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 05:57:12,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-11-29 05:57:12,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:57:12,403 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 05:57:12,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:57:12,404 INFO L85 PathProgramCache]: Analyzing trace with hash 527869216, now seen corresponding path program 1 times [2023-11-29 05:57:12,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:57:12,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1196110953] [2023-11-29 05:57:12,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:57:12,404 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 [2023-11-29 05:57:12,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:57:12,405 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 05:57:12,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:57:12,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:57:12,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 05:57:12,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:57:12,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:12,533 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-29 05:57:12,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2023-11-29 05:57:12,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 10 treesize of output 8 [2023-11-29 05:57:12,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:12,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:12,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2023-11-29 05:57:12,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:12,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-29 05:57:12,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:57:12,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:57:13,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:57:13,233 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:57:13,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1196110953] [2023-11-29 05:57:13,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1196110953] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:57:13,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:57:13,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-29 05:57:13,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061975299] [2023-11-29 05:57:13,234 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:57:13,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 05:57:13,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:57:13,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 05:57:13,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-11-29 05:57:14,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 56 [2023-11-29 05:57:14,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 59 transitions, 170 flow. Second operand has 10 states, 10 states have (on average 28.0) internal successors, (280), 10 states have internal predecessors, (280), 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) [2023-11-29 05:57:14,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:57:14,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 56 [2023-11-29 05:57:14,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:57:14,774 INFO L124 PetriNetUnfolderBase]: 181/458 cut-off events. [2023-11-29 05:57:14,774 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-29 05:57:14,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 802 conditions, 458 events. 181/458 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2373 event pairs, 138 based on Foata normal form. 0/342 useless extension candidates. Maximal degree in co-relation 790. Up to 303 conditions per place. [2023-11-29 05:57:14,778 INFO L140 encePairwiseOnDemand]: 51/56 looper letters, 32 selfloop transitions, 4 changer transitions 0/57 dead transitions. [2023-11-29 05:57:14,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 57 transitions, 238 flow [2023-11-29 05:57:14,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:57:14,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:57:14,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 167 transitions. [2023-11-29 05:57:14,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964285714285714 [2023-11-29 05:57:14,780 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 167 transitions. [2023-11-29 05:57:14,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 167 transitions. [2023-11-29 05:57:14,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:57:14,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 167 transitions. [2023-11-29 05:57:14,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 33.4) internal successors, (167), 5 states have internal predecessors, (167), 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) [2023-11-29 05:57:14,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 56.0) internal successors, (336), 6 states have internal predecessors, (336), 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) [2023-11-29 05:57:14,782 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 56.0) internal successors, (336), 6 states have internal predecessors, (336), 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) [2023-11-29 05:57:14,782 INFO L175 Difference]: Start difference. First operand has 62 places, 59 transitions, 170 flow. Second operand 5 states and 167 transitions. [2023-11-29 05:57:14,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 57 transitions, 238 flow [2023-11-29 05:57:14,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 57 transitions, 237 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 05:57:14,785 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 173 flow [2023-11-29 05:57:14,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=165, 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=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=173, PETRI_PLACES=63, PETRI_TRANSITIONS=57} [2023-11-29 05:57:14,786 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 6 predicate places. [2023-11-29 05:57:14,786 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 173 flow [2023-11-29 05:57:14,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 28.0) internal successors, (280), 10 states have internal predecessors, (280), 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) [2023-11-29 05:57:14,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:57:14,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:57:14,789 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2023-11-29 05:57:14,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:57:14,989 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 05:57:14,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:57:14,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1877059222, now seen corresponding path program 1 times [2023-11-29 05:57:14,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:57:14,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1369960963] [2023-11-29 05:57:14,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:57:14,990 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 [2023-11-29 05:57:14,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:57:14,991 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 05:57:14,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:57:15,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:57:15,069 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 05:57:15,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:57:15,103 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-29 05:57:15,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 17 [2023-11-29 05:57:15,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:15,141 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-29 05:57:15,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 13 [2023-11-29 05:57:15,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:15,164 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-29 05:57:15,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 13 [2023-11-29 05:57:15,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:57:15,626 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:57:15,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:57:15,934 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:57:15,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1369960963] [2023-11-29 05:57:15,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1369960963] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:57:15,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:57:15,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-29 05:57:15,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632462564] [2023-11-29 05:57:15,934 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:57:15,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 05:57:15,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:57:15,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 05:57:15,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-11-29 05:57:16,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 56 [2023-11-29 05:57:16,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 173 flow. Second operand has 10 states, 10 states have (on average 28.4) internal successors, (284), 10 states have internal predecessors, (284), 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) [2023-11-29 05:57:16,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:57:16,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 56 [2023-11-29 05:57:16,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:57:17,444 INFO L124 PetriNetUnfolderBase]: 129/356 cut-off events. [2023-11-29 05:57:17,444 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-11-29 05:57:17,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 631 conditions, 356 events. 129/356 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1750 event pairs, 96 based on Foata normal form. 0/269 useless extension candidates. Maximal degree in co-relation 618. Up to 230 conditions per place. [2023-11-29 05:57:17,452 INFO L140 encePairwiseOnDemand]: 51/56 looper letters, 32 selfloop transitions, 4 changer transitions 0/55 dead transitions. [2023-11-29 05:57:17,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 55 transitions, 241 flow [2023-11-29 05:57:17,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:57:17,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:57:17,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 167 transitions. [2023-11-29 05:57:17,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964285714285714 [2023-11-29 05:57:17,454 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 167 transitions. [2023-11-29 05:57:17,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 167 transitions. [2023-11-29 05:57:17,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:57:17,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 167 transitions. [2023-11-29 05:57:17,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 33.4) internal successors, (167), 5 states have internal predecessors, (167), 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) [2023-11-29 05:57:17,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 56.0) internal successors, (336), 6 states have internal predecessors, (336), 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) [2023-11-29 05:57:17,456 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 56.0) internal successors, (336), 6 states have internal predecessors, (336), 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) [2023-11-29 05:57:17,456 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 173 flow. Second operand 5 states and 167 transitions. [2023-11-29 05:57:17,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 55 transitions, 241 flow [2023-11-29 05:57:17,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 55 transitions, 235 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 05:57:17,459 INFO L231 Difference]: Finished difference. Result has 62 places, 55 transitions, 171 flow [2023-11-29 05:57:17,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=171, PETRI_PLACES=62, PETRI_TRANSITIONS=55} [2023-11-29 05:57:17,460 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 5 predicate places. [2023-11-29 05:57:17,460 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 55 transitions, 171 flow [2023-11-29 05:57:17,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 28.4) internal successors, (284), 10 states have internal predecessors, (284), 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) [2023-11-29 05:57:17,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:57:17,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:57:17,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-11-29 05:57:17,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:57:17,661 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 05:57:17,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:57:17,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1877059221, now seen corresponding path program 1 times [2023-11-29 05:57:17,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:57:17,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [548965842] [2023-11-29 05:57:17,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:57:17,661 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 [2023-11-29 05:57:17,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:57:17,662 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 05:57:17,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:57:17,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:57:17,730 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 05:57:17,732 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:57:17,743 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 05:57:17,744 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 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-29 05:57:17,764 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 05:57:17,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 15 [2023-11-29 05:57:17,780 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 05:57:17,780 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 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-29 05:57:17,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:57:17,868 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:57:17,868 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:57:17,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [548965842] [2023-11-29 05:57:17,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [548965842] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:57:17,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:57:17,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 05:57:17,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91399815] [2023-11-29 05:57:17,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:57:17,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:57:17,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:57:17,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:57:17,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:57:17,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 56 [2023-11-29 05:57:17,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 55 transitions, 171 flow. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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) [2023-11-29 05:57:17,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:57:17,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 56 [2023-11-29 05:57:17,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:57:18,091 INFO L124 PetriNetUnfolderBase]: 129/353 cut-off events. [2023-11-29 05:57:18,091 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-11-29 05:57:18,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 630 conditions, 353 events. 129/353 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1730 event pairs, 96 based on Foata normal form. 0/266 useless extension candidates. Maximal degree in co-relation 617. Up to 234 conditions per place. [2023-11-29 05:57:18,094 INFO L140 encePairwiseOnDemand]: 53/56 looper letters, 35 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2023-11-29 05:57:18,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 53 transitions, 239 flow [2023-11-29 05:57:18,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:57:18,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:57:18,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 108 transitions. [2023-11-29 05:57:18,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2023-11-29 05:57:18,106 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 108 transitions. [2023-11-29 05:57:18,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 108 transitions. [2023-11-29 05:57:18,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:57:18,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 108 transitions. [2023-11-29 05:57:18,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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) [2023-11-29 05:57:18,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 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) [2023-11-29 05:57:18,108 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 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) [2023-11-29 05:57:18,108 INFO L175 Difference]: Start difference. First operand has 62 places, 55 transitions, 171 flow. Second operand 3 states and 108 transitions. [2023-11-29 05:57:18,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 53 transitions, 239 flow [2023-11-29 05:57:18,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 53 transitions, 233 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 05:57:18,110 INFO L231 Difference]: Finished difference. Result has 59 places, 53 transitions, 163 flow [2023-11-29 05:57:18,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=163, PETRI_PLACES=59, PETRI_TRANSITIONS=53} [2023-11-29 05:57:18,111 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 2 predicate places. [2023-11-29 05:57:18,112 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 53 transitions, 163 flow [2023-11-29 05:57:18,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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) [2023-11-29 05:57:18,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:57:18,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:57:18,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:57:18,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:57:18,316 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 05:57:18,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:57:18,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1940660475, now seen corresponding path program 1 times [2023-11-29 05:57:18,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:57:18,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [624982028] [2023-11-29 05:57:18,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:57:18,317 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 [2023-11-29 05:57:18,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:57:18,318 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 05:57:18,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:57:18,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:57:18,380 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 05:57:18,382 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:57:18,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 7 [2023-11-29 05:57:18,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:18,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 05:57:18,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:18,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 05:57:18,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:18,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 05:57:18,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:18,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 05:57:18,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:18,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 05:57:18,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:57:18,451 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:57:18,451 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:57:18,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [624982028] [2023-11-29 05:57:18,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [624982028] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:57:18,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:57:18,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:57:18,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533342519] [2023-11-29 05:57:18,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:57:18,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:57:18,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:57:18,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:57:18,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:57:18,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 56 [2023-11-29 05:57:18,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 53 transitions, 163 flow. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 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) [2023-11-29 05:57:18,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:57:18,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 56 [2023-11-29 05:57:18,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:57:18,729 INFO L124 PetriNetUnfolderBase]: 117/274 cut-off events. [2023-11-29 05:57:18,729 INFO L125 PetriNetUnfolderBase]: For 15/18 co-relation queries the response was YES. [2023-11-29 05:57:18,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 526 conditions, 274 events. 117/274 cut-off events. For 15/18 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1108 event pairs, 86 based on Foata normal form. 0/243 useless extension candidates. Maximal degree in co-relation 513. Up to 199 conditions per place. [2023-11-29 05:57:18,731 INFO L140 encePairwiseOnDemand]: 48/56 looper letters, 29 selfloop transitions, 5 changer transitions 0/47 dead transitions. [2023-11-29 05:57:18,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 47 transitions, 219 flow [2023-11-29 05:57:18,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:57:18,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 05:57:18,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 125 transitions. [2023-11-29 05:57:18,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5580357142857143 [2023-11-29 05:57:18,733 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 125 transitions. [2023-11-29 05:57:18,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 125 transitions. [2023-11-29 05:57:18,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:57:18,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 125 transitions. [2023-11-29 05:57:18,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 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) [2023-11-29 05:57:18,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 56.0) internal successors, (280), 5 states have internal predecessors, (280), 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) [2023-11-29 05:57:18,735 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 56.0) internal successors, (280), 5 states have internal predecessors, (280), 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) [2023-11-29 05:57:18,735 INFO L175 Difference]: Start difference. First operand has 59 places, 53 transitions, 163 flow. Second operand 4 states and 125 transitions. [2023-11-29 05:57:18,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 47 transitions, 219 flow [2023-11-29 05:57:18,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 47 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 05:57:18,737 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 160 flow [2023-11-29 05:57:18,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=160, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2023-11-29 05:57:18,738 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -2 predicate places. [2023-11-29 05:57:18,738 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 160 flow [2023-11-29 05:57:18,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 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) [2023-11-29 05:57:18,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:57:18,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:57:18,740 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2023-11-29 05:57:18,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:57:18,941 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 05:57:18,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:57:18,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1940660474, now seen corresponding path program 1 times [2023-11-29 05:57:18,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:57:18,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [275775604] [2023-11-29 05:57:18,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:57:18,942 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 [2023-11-29 05:57:18,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:57:18,942 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 05:57:18,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:57:18,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:57:19,001 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 05:57:19,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:57:19,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:57:19,088 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:57:19,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2023-11-29 05:57:19,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:57:19,387 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:57:19,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [275775604] [2023-11-29 05:57:19,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [275775604] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:57:19,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:57:19,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-11-29 05:57:19,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036080594] [2023-11-29 05:57:19,388 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:57:19,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:57:19,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:57:19,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:57:19,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:57:20,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 56 [2023-11-29 05:57:20,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 160 flow. Second operand has 8 states, 8 states have (on average 32.0) internal successors, (256), 8 states have internal predecessors, (256), 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) [2023-11-29 05:57:20,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:57:20,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 56 [2023-11-29 05:57:20,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:57:20,955 INFO L124 PetriNetUnfolderBase]: 229/482 cut-off events. [2023-11-29 05:57:20,956 INFO L125 PetriNetUnfolderBase]: For 16/19 co-relation queries the response was YES. [2023-11-29 05:57:20,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 937 conditions, 482 events. 229/482 cut-off events. For 16/19 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2257 event pairs, 86 based on Foata normal form. 0/407 useless extension candidates. Maximal degree in co-relation 923. Up to 213 conditions per place. [2023-11-29 05:57:20,959 INFO L140 encePairwiseOnDemand]: 51/56 looper letters, 44 selfloop transitions, 8 changer transitions 0/64 dead transitions. [2023-11-29 05:57:20,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 64 transitions, 301 flow [2023-11-29 05:57:20,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:57:20,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:57:20,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 227 transitions. [2023-11-29 05:57:20,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6755952380952381 [2023-11-29 05:57:20,962 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 227 transitions. [2023-11-29 05:57:20,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 227 transitions. [2023-11-29 05:57:20,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:57:20,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 227 transitions. [2023-11-29 05:57:20,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 37.833333333333336) internal successors, (227), 6 states have internal predecessors, (227), 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) [2023-11-29 05:57:20,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 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) [2023-11-29 05:57:20,965 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 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) [2023-11-29 05:57:20,965 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 160 flow. Second operand 6 states and 227 transitions. [2023-11-29 05:57:20,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 64 transitions, 301 flow [2023-11-29 05:57:20,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 64 transitions, 295 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:57:20,968 INFO L231 Difference]: Finished difference. Result has 59 places, 48 transitions, 181 flow [2023-11-29 05:57:20,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=181, PETRI_PLACES=59, PETRI_TRANSITIONS=48} [2023-11-29 05:57:20,969 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 2 predicate places. [2023-11-29 05:57:20,969 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 48 transitions, 181 flow [2023-11-29 05:57:20,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 32.0) internal successors, (256), 8 states have internal predecessors, (256), 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) [2023-11-29 05:57:20,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:57:20,969 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:57:20,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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)] Ended with exit code 0 [2023-11-29 05:57:21,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:57:21,172 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 05:57:21,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:57:21,172 INFO L85 PathProgramCache]: Analyzing trace with hash -958890294, now seen corresponding path program 1 times [2023-11-29 05:57:21,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:57:21,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [623474166] [2023-11-29 05:57:21,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:57:21,173 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 [2023-11-29 05:57:21,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:57:21,173 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 05:57:21,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:57:21,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:57:21,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 05:57:21,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:57:21,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-29 05:57:21,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:21,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 05:57:21,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:21,307 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 05:57:21,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:21,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:57:21,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:21,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:57:21,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:21,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 05:57:21,560 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:57:21,560 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:57:22,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:57:22,451 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:57:22,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [623474166] [2023-11-29 05:57:22,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [623474166] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:57:22,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:57:22,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2023-11-29 05:57:22,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765382113] [2023-11-29 05:57:22,452 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:57:22,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 05:57:22,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:57:22,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 05:57:22,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-11-29 05:57:25,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 56 [2023-11-29 05:57:25,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 48 transitions, 181 flow. Second operand has 11 states, 11 states have (on average 30.818181818181817) internal successors, (339), 11 states have internal predecessors, (339), 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) [2023-11-29 05:57:25,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:57:25,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 56 [2023-11-29 05:57:25,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:57:28,398 INFO L124 PetriNetUnfolderBase]: 625/1373 cut-off events. [2023-11-29 05:57:28,398 INFO L125 PetriNetUnfolderBase]: For 92/108 co-relation queries the response was YES. [2023-11-29 05:57:28,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2722 conditions, 1373 events. 625/1373 cut-off events. For 92/108 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 8246 event pairs, 423 based on Foata normal form. 0/1192 useless extension candidates. Maximal degree in co-relation 2707. Up to 393 conditions per place. [2023-11-29 05:57:28,406 INFO L140 encePairwiseOnDemand]: 49/56 looper letters, 83 selfloop transitions, 16 changer transitions 0/110 dead transitions. [2023-11-29 05:57:28,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 110 transitions, 523 flow [2023-11-29 05:57:28,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 05:57:28,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 05:57:28,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 387 transitions. [2023-11-29 05:57:28,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6910714285714286 [2023-11-29 05:57:28,408 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 387 transitions. [2023-11-29 05:57:28,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 387 transitions. [2023-11-29 05:57:28,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:57:28,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 387 transitions. [2023-11-29 05:57:28,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 38.7) internal successors, (387), 10 states have internal predecessors, (387), 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) [2023-11-29 05:57:28,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 56.0) internal successors, (616), 11 states have internal predecessors, (616), 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) [2023-11-29 05:57:28,411 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 56.0) internal successors, (616), 11 states have internal predecessors, (616), 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) [2023-11-29 05:57:28,411 INFO L175 Difference]: Start difference. First operand has 59 places, 48 transitions, 181 flow. Second operand 10 states and 387 transitions. [2023-11-29 05:57:28,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 110 transitions, 523 flow [2023-11-29 05:57:28,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 110 transitions, 514 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 05:57:28,413 INFO L231 Difference]: Finished difference. Result has 67 places, 54 transitions, 242 flow [2023-11-29 05:57:28,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=242, PETRI_PLACES=67, PETRI_TRANSITIONS=54} [2023-11-29 05:57:28,414 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 10 predicate places. [2023-11-29 05:57:28,414 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 54 transitions, 242 flow [2023-11-29 05:57:28,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 30.818181818181817) internal successors, (339), 11 states have internal predecessors, (339), 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) [2023-11-29 05:57:28,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:57:28,414 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2023-11-29 05:57:28,417 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:57:28,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:57:28,615 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 05:57:28,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:57:28,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1179305817, now seen corresponding path program 2 times [2023-11-29 05:57:28,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:57:28,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1362307504] [2023-11-29 05:57:28,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:57:28,616 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 [2023-11-29 05:57:28,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:57:28,617 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 05:57:28,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:57:28,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:57:28,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:57:28,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 05:57:28,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:57:28,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 05:57:28,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:28,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:57:28,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:28,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 05:57:28,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:28,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:57:28,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:28,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 05:57:28,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:28,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:57:29,035 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:57:29,035 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:57:29,939 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:57:29,939 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:57:29,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1362307504] [2023-11-29 05:57:29,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1362307504] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:57:29,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:57:29,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-29 05:57:29,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249726477] [2023-11-29 05:57:29,940 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:57:29,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 05:57:29,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:57:29,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 05:57:29,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-29 05:57:32,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 56 [2023-11-29 05:57:32,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 54 transitions, 242 flow. Second operand has 14 states, 14 states have (on average 31.571428571428573) internal successors, (442), 14 states have internal predecessors, (442), 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) [2023-11-29 05:57:32,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:57:32,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 56 [2023-11-29 05:57:32,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:57:35,994 INFO L124 PetriNetUnfolderBase]: 605/1357 cut-off events. [2023-11-29 05:57:35,995 INFO L125 PetriNetUnfolderBase]: For 482/494 co-relation queries the response was YES. [2023-11-29 05:57:35,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3001 conditions, 1357 events. 605/1357 cut-off events. For 482/494 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 8343 event pairs, 495 based on Foata normal form. 6/1304 useless extension candidates. Maximal degree in co-relation 2984. Up to 1050 conditions per place. [2023-11-29 05:57:36,002 INFO L140 encePairwiseOnDemand]: 51/56 looper letters, 31 selfloop transitions, 29 changer transitions 0/72 dead transitions. [2023-11-29 05:57:36,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 72 transitions, 482 flow [2023-11-29 05:57:36,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 05:57:36,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-29 05:57:36,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 689 transitions. [2023-11-29 05:57:36,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5858843537414966 [2023-11-29 05:57:36,006 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 689 transitions. [2023-11-29 05:57:36,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 689 transitions. [2023-11-29 05:57:36,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:57:36,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 689 transitions. [2023-11-29 05:57:36,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 32.80952380952381) internal successors, (689), 21 states have internal predecessors, (689), 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) [2023-11-29 05:57:36,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 56.0) internal successors, (1232), 22 states have internal predecessors, (1232), 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) [2023-11-29 05:57:36,013 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 56.0) internal successors, (1232), 22 states have internal predecessors, (1232), 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) [2023-11-29 05:57:36,013 INFO L175 Difference]: Start difference. First operand has 67 places, 54 transitions, 242 flow. Second operand 21 states and 689 transitions. [2023-11-29 05:57:36,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 72 transitions, 482 flow [2023-11-29 05:57:36,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 72 transitions, 474 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 05:57:36,020 INFO L231 Difference]: Finished difference. Result has 90 places, 72 transitions, 442 flow [2023-11-29 05:57:36,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=442, PETRI_PLACES=90, PETRI_TRANSITIONS=72} [2023-11-29 05:57:36,021 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 33 predicate places. [2023-11-29 05:57:36,021 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 72 transitions, 442 flow [2023-11-29 05:57:36,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 31.571428571428573) internal successors, (442), 14 states have internal predecessors, (442), 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) [2023-11-29 05:57:36,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:57:36,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:57:36,025 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2023-11-29 05:57:36,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:57:36,225 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 05:57:36,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:57:36,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1009490909, now seen corresponding path program 1 times [2023-11-29 05:57:36,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:57:36,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1416643347] [2023-11-29 05:57:36,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:57:36,226 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 [2023-11-29 05:57:36,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:57:36,227 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 05:57:36,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:57:36,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:57:36,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 05:57:36,323 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:57:36,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:57:36,448 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:57:36,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2023-11-29 05:57:36,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:57:36,783 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:57:36,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1416643347] [2023-11-29 05:57:36,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1416643347] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:57:36,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:57:36,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-11-29 05:57:36,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210960390] [2023-11-29 05:57:36,783 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:57:36,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:57:36,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:57:36,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:57:36,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:57:37,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 56 [2023-11-29 05:57:37,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 72 transitions, 442 flow. Second operand has 8 states, 8 states have (on average 28.5) internal successors, (228), 8 states have internal predecessors, (228), 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) [2023-11-29 05:57:37,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:57:37,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 56 [2023-11-29 05:57:37,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:57:38,371 INFO L124 PetriNetUnfolderBase]: 1157/2103 cut-off events. [2023-11-29 05:57:38,371 INFO L125 PetriNetUnfolderBase]: For 1097/1131 co-relation queries the response was YES. [2023-11-29 05:57:38,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5070 conditions, 2103 events. 1157/2103 cut-off events. For 1097/1131 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 11498 event pairs, 243 based on Foata normal form. 4/1760 useless extension candidates. Maximal degree in co-relation 5046. Up to 1465 conditions per place. [2023-11-29 05:57:38,391 INFO L140 encePairwiseOnDemand]: 51/56 looper letters, 68 selfloop transitions, 14 changer transitions 0/90 dead transitions. [2023-11-29 05:57:38,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 90 transitions, 680 flow [2023-11-29 05:57:38,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:57:38,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:57:38,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 201 transitions. [2023-11-29 05:57:38,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5982142857142857 [2023-11-29 05:57:38,393 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 201 transitions. [2023-11-29 05:57:38,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 201 transitions. [2023-11-29 05:57:38,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:57:38,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 201 transitions. [2023-11-29 05:57:38,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 33.5) internal successors, (201), 6 states have internal predecessors, (201), 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) [2023-11-29 05:57:38,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 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) [2023-11-29 05:57:38,396 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 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) [2023-11-29 05:57:38,396 INFO L175 Difference]: Start difference. First operand has 90 places, 72 transitions, 442 flow. Second operand 6 states and 201 transitions. [2023-11-29 05:57:38,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 90 transitions, 680 flow [2023-11-29 05:57:38,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 90 transitions, 616 flow, removed 21 selfloop flow, removed 8 redundant places. [2023-11-29 05:57:38,404 INFO L231 Difference]: Finished difference. Result has 88 places, 73 transitions, 423 flow [2023-11-29 05:57:38,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=423, PETRI_PLACES=88, PETRI_TRANSITIONS=73} [2023-11-29 05:57:38,404 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 31 predicate places. [2023-11-29 05:57:38,405 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 73 transitions, 423 flow [2023-11-29 05:57:38,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 28.5) internal successors, (228), 8 states have internal predecessors, (228), 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) [2023-11-29 05:57:38,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:57:38,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:57:38,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:57:38,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:57:38,607 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 05:57:38,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:57:38,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1229446508, now seen corresponding path program 1 times [2023-11-29 05:57:38,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:57:38,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [772720897] [2023-11-29 05:57:38,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:57:38,608 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 [2023-11-29 05:57:38,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:57:38,609 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 05:57:38,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:57:38,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:57:38,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 05:57:38,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:57:38,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 05:57:38,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:38,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:57:38,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:38,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 05:57:38,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:38,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:57:38,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:38,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 05:57:38,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:38,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:57:39,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:57:39,047 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:57:39,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:57:39,989 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:57:39,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [772720897] [2023-11-29 05:57:39,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [772720897] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:57:39,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:57:39,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2023-11-29 05:57:39,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79821158] [2023-11-29 05:57:39,990 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:57:39,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 05:57:39,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:57:39,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 05:57:39,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-11-29 05:57:44,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 56 [2023-11-29 05:57:44,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 73 transitions, 423 flow. Second operand has 11 states, 11 states have (on average 27.0) internal successors, (297), 11 states have internal predecessors, (297), 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) [2023-11-29 05:57:44,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:57:44,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 56 [2023-11-29 05:57:44,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:57:46,754 INFO L124 PetriNetUnfolderBase]: 927/1714 cut-off events. [2023-11-29 05:57:46,755 INFO L125 PetriNetUnfolderBase]: For 973/1018 co-relation queries the response was YES. [2023-11-29 05:57:46,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4253 conditions, 1714 events. 927/1714 cut-off events. For 973/1018 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 8774 event pairs, 537 based on Foata normal form. 4/1539 useless extension candidates. Maximal degree in co-relation 4228. Up to 677 conditions per place. [2023-11-29 05:57:46,765 INFO L140 encePairwiseOnDemand]: 45/56 looper letters, 90 selfloop transitions, 26 changer transitions 0/123 dead transitions. [2023-11-29 05:57:46,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 123 transitions, 801 flow [2023-11-29 05:57:46,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 05:57:46,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 05:57:46,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 349 transitions. [2023-11-29 05:57:46,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6232142857142857 [2023-11-29 05:57:46,768 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 349 transitions. [2023-11-29 05:57:46,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 349 transitions. [2023-11-29 05:57:46,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:57:46,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 349 transitions. [2023-11-29 05:57:46,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 34.9) internal successors, (349), 10 states have internal predecessors, (349), 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) [2023-11-29 05:57:46,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 56.0) internal successors, (616), 11 states have internal predecessors, (616), 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) [2023-11-29 05:57:46,771 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 56.0) internal successors, (616), 11 states have internal predecessors, (616), 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) [2023-11-29 05:57:46,771 INFO L175 Difference]: Start difference. First operand has 88 places, 73 transitions, 423 flow. Second operand 10 states and 349 transitions. [2023-11-29 05:57:46,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 123 transitions, 801 flow [2023-11-29 05:57:46,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 123 transitions, 782 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 05:57:46,776 INFO L231 Difference]: Finished difference. Result has 95 places, 77 transitions, 494 flow [2023-11-29 05:57:46,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=494, PETRI_PLACES=95, PETRI_TRANSITIONS=77} [2023-11-29 05:57:46,776 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 38 predicate places. [2023-11-29 05:57:46,776 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 77 transitions, 494 flow [2023-11-29 05:57:46,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 27.0) internal successors, (297), 11 states have internal predecessors, (297), 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) [2023-11-29 05:57:46,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:57:46,777 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:57:46,779 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:57:46,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:57:46,977 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 05:57:46,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:57:46,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1703041766, now seen corresponding path program 2 times [2023-11-29 05:57:46,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:57:46,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1102995466] [2023-11-29 05:57:46,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:57:46,978 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 [2023-11-29 05:57:46,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:57:46,979 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 05:57:46,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:57:47,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 05:57:47,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:57:47,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 05:57:47,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:57:47,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 05:57:47,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:47,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:57:47,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:47,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:57:47,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:47,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 05:57:47,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:47,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:57:47,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:47,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 05:57:47,321 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-29 05:57:47,322 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:57:48,112 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-29 05:57:48,113 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:57:48,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1102995466] [2023-11-29 05:57:48,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1102995466] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:57:48,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:57:48,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-11-29 05:57:48,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510132338] [2023-11-29 05:57:48,113 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:57:48,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:57:48,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:57:48,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:57:48,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:57:51,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 56 [2023-11-29 05:57:51,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 77 transitions, 494 flow. Second operand has 8 states, 8 states have (on average 32.5) internal successors, (260), 8 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:57:51,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:57:51,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 56 [2023-11-29 05:57:51,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:57:52,068 INFO L124 PetriNetUnfolderBase]: 812/1566 cut-off events. [2023-11-29 05:57:52,069 INFO L125 PetriNetUnfolderBase]: For 739/751 co-relation queries the response was YES. [2023-11-29 05:57:52,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4105 conditions, 1566 events. 812/1566 cut-off events. For 739/751 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 8507 event pairs, 486 based on Foata normal form. 24/1581 useless extension candidates. Maximal degree in co-relation 4078. Up to 1054 conditions per place. [2023-11-29 05:57:52,080 INFO L140 encePairwiseOnDemand]: 51/56 looper letters, 60 selfloop transitions, 20 changer transitions 0/92 dead transitions. [2023-11-29 05:57:52,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 92 transitions, 699 flow [2023-11-29 05:57:52,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:57:52,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:57:52,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 185 transitions. [2023-11-29 05:57:52,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6607142857142857 [2023-11-29 05:57:52,082 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 185 transitions. [2023-11-29 05:57:52,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 185 transitions. [2023-11-29 05:57:52,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:57:52,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 185 transitions. [2023-11-29 05:57:52,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 37.0) internal successors, (185), 5 states have internal predecessors, (185), 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) [2023-11-29 05:57:52,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 56.0) internal successors, (336), 6 states have internal predecessors, (336), 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) [2023-11-29 05:57:52,084 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 56.0) internal successors, (336), 6 states have internal predecessors, (336), 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) [2023-11-29 05:57:52,084 INFO L175 Difference]: Start difference. First operand has 95 places, 77 transitions, 494 flow. Second operand 5 states and 185 transitions. [2023-11-29 05:57:52,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 92 transitions, 699 flow [2023-11-29 05:57:52,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 92 transitions, 668 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-29 05:57:52,090 INFO L231 Difference]: Finished difference. Result has 92 places, 76 transitions, 495 flow [2023-11-29 05:57:52,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=455, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=495, PETRI_PLACES=92, PETRI_TRANSITIONS=76} [2023-11-29 05:57:52,090 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 35 predicate places. [2023-11-29 05:57:52,090 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 76 transitions, 495 flow [2023-11-29 05:57:52,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 32.5) internal successors, (260), 8 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:57:52,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:57:52,091 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:57:52,093 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2023-11-29 05:57:52,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:57:52,291 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 05:57:52,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:57:52,292 INFO L85 PathProgramCache]: Analyzing trace with hash 900527332, now seen corresponding path program 2 times [2023-11-29 05:57:52,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:57:52,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [300282658] [2023-11-29 05:57:52,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:57:52,292 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 [2023-11-29 05:57:52,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:57:52,293 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 05:57:52,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:57:52,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 05:57:52,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:57:52,400 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 05:57:52,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:57:52,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-29 05:57:52,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:52,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 05:57:52,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:52,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:57:52,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:52,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 05:57:52,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:52,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 05:57:52,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:52,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:57:52,687 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 05:57:52,687 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:57:52,687 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:57:52,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [300282658] [2023-11-29 05:57:52,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [300282658] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:57:52,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:57:52,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:57:52,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927652778] [2023-11-29 05:57:52,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:57:52,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:57:52,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:57:52,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:57:52,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:57:53,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 56 [2023-11-29 05:57:53,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 76 transitions, 495 flow. Second operand has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 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) [2023-11-29 05:57:53,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:57:53,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 56 [2023-11-29 05:57:53,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:57:53,571 INFO L124 PetriNetUnfolderBase]: 812/1510 cut-off events. [2023-11-29 05:57:53,572 INFO L125 PetriNetUnfolderBase]: For 1410/1422 co-relation queries the response was YES. [2023-11-29 05:57:53,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4108 conditions, 1510 events. 812/1510 cut-off events. For 1410/1422 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 7716 event pairs, 306 based on Foata normal form. 84/1587 useless extension candidates. Maximal degree in co-relation 4082. Up to 750 conditions per place. [2023-11-29 05:57:53,582 INFO L140 encePairwiseOnDemand]: 47/56 looper letters, 60 selfloop transitions, 17 changer transitions 0/84 dead transitions. [2023-11-29 05:57:53,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 84 transitions, 692 flow [2023-11-29 05:57:53,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:57:53,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:57:53,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 164 transitions. [2023-11-29 05:57:53,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2023-11-29 05:57:53,584 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 164 transitions. [2023-11-29 05:57:53,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 164 transitions. [2023-11-29 05:57:53,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:57:53,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 164 transitions. [2023-11-29 05:57:53,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 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) [2023-11-29 05:57:53,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 56.0) internal successors, (336), 6 states have internal predecessors, (336), 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) [2023-11-29 05:57:53,585 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 56.0) internal successors, (336), 6 states have internal predecessors, (336), 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) [2023-11-29 05:57:53,585 INFO L175 Difference]: Start difference. First operand has 92 places, 76 transitions, 495 flow. Second operand 5 states and 164 transitions. [2023-11-29 05:57:53,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 84 transitions, 692 flow [2023-11-29 05:57:53,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 84 transitions, 630 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-29 05:57:53,590 INFO L231 Difference]: Finished difference. Result has 85 places, 71 transitions, 453 flow [2023-11-29 05:57:53,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=453, PETRI_PLACES=85, PETRI_TRANSITIONS=71} [2023-11-29 05:57:53,591 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 28 predicate places. [2023-11-29 05:57:53,591 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 71 transitions, 453 flow [2023-11-29 05:57:53,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 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) [2023-11-29 05:57:53,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:57:53,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:57:53,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-11-29 05:57:53,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:57:53,792 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 05:57:53,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:57:53,792 INFO L85 PathProgramCache]: Analyzing trace with hash -832518771, now seen corresponding path program 1 times [2023-11-29 05:57:53,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:57:53,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2041181098] [2023-11-29 05:57:53,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:57:53,793 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 [2023-11-29 05:57:53,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:57:53,794 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 05:57:53,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:57:53,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:57:53,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 05:57:53,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:57:53,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:57:53,938 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:57:53,938 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:57:53,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2041181098] [2023-11-29 05:57:53,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2041181098] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:57:53,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:57:53,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:57:53,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882318152] [2023-11-29 05:57:53,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:57:53,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:57:53,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:57:53,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:57:53,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:57:53,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 56 [2023-11-29 05:57:53,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 71 transitions, 453 flow. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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) [2023-11-29 05:57:53,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:57:53,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 56 [2023-11-29 05:57:53,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:57:54,273 INFO L124 PetriNetUnfolderBase]: 812/1520 cut-off events. [2023-11-29 05:57:54,273 INFO L125 PetriNetUnfolderBase]: For 727/738 co-relation queries the response was YES. [2023-11-29 05:57:54,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3937 conditions, 1520 events. 812/1520 cut-off events. For 727/738 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 7784 event pairs, 238 based on Foata normal form. 6/1519 useless extension candidates. Maximal degree in co-relation 3913. Up to 1135 conditions per place. [2023-11-29 05:57:54,284 INFO L140 encePairwiseOnDemand]: 52/56 looper letters, 77 selfloop transitions, 5 changer transitions 1/90 dead transitions. [2023-11-29 05:57:54,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 90 transitions, 692 flow [2023-11-29 05:57:54,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:57:54,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:57:54,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 130 transitions. [2023-11-29 05:57:54,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7738095238095238 [2023-11-29 05:57:54,286 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 130 transitions. [2023-11-29 05:57:54,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 130 transitions. [2023-11-29 05:57:54,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:57:54,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 130 transitions. [2023-11-29 05:57:54,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 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) [2023-11-29 05:57:54,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 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) [2023-11-29 05:57:54,287 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 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) [2023-11-29 05:57:54,288 INFO L175 Difference]: Start difference. First operand has 85 places, 71 transitions, 453 flow. Second operand 3 states and 130 transitions. [2023-11-29 05:57:54,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 90 transitions, 692 flow [2023-11-29 05:57:54,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 90 transitions, 652 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 05:57:54,293 INFO L231 Difference]: Finished difference. Result has 84 places, 75 transitions, 466 flow [2023-11-29 05:57:54,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=466, PETRI_PLACES=84, PETRI_TRANSITIONS=75} [2023-11-29 05:57:54,294 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 27 predicate places. [2023-11-29 05:57:54,294 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 75 transitions, 466 flow [2023-11-29 05:57:54,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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) [2023-11-29 05:57:54,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:57:54,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:57:54,297 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:57:54,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:57:54,495 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 05:57:54,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:57:54,495 INFO L85 PathProgramCache]: Analyzing trace with hash -43311047, now seen corresponding path program 1 times [2023-11-29 05:57:54,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:57:54,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [361996062] [2023-11-29 05:57:54,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:57:54,496 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 [2023-11-29 05:57:54,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:57:54,497 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 05:57:54,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:57:54,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:57:54,608 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 05:57:54,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:57:54,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:57:54,668 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:57:54,668 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:57:54,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [361996062] [2023-11-29 05:57:54,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [361996062] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:57:54,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:57:54,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 05:57:54,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996530656] [2023-11-29 05:57:54,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:57:54,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:57:54,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:57:54,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:57:54,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:57:54,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 56 [2023-11-29 05:57:54,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 75 transitions, 466 flow. Second operand has 6 states, 6 states have (on average 33.833333333333336) internal successors, (203), 6 states have internal predecessors, (203), 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) [2023-11-29 05:57:54,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:57:54,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 56 [2023-11-29 05:57:54,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:57:55,196 INFO L124 PetriNetUnfolderBase]: 842/1596 cut-off events. [2023-11-29 05:57:55,196 INFO L125 PetriNetUnfolderBase]: For 867/867 co-relation queries the response was YES. [2023-11-29 05:57:55,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4301 conditions, 1596 events. 842/1596 cut-off events. For 867/867 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 8566 event pairs, 101 based on Foata normal form. 75/1671 useless extension candidates. Maximal degree in co-relation 4276. Up to 759 conditions per place. [2023-11-29 05:57:55,205 INFO L140 encePairwiseOnDemand]: 47/56 looper letters, 99 selfloop transitions, 34 changer transitions 1/141 dead transitions. [2023-11-29 05:57:55,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 141 transitions, 979 flow [2023-11-29 05:57:55,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:57:55,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 05:57:55,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 318 transitions. [2023-11-29 05:57:55,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7098214285714286 [2023-11-29 05:57:55,207 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 318 transitions. [2023-11-29 05:57:55,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 318 transitions. [2023-11-29 05:57:55,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:57:55,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 318 transitions. [2023-11-29 05:57:55,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 39.75) internal successors, (318), 8 states have internal predecessors, (318), 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) [2023-11-29 05:57:55,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 56.0) internal successors, (504), 9 states have internal predecessors, (504), 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) [2023-11-29 05:57:55,210 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 56.0) internal successors, (504), 9 states have internal predecessors, (504), 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) [2023-11-29 05:57:55,210 INFO L175 Difference]: Start difference. First operand has 84 places, 75 transitions, 466 flow. Second operand 8 states and 318 transitions. [2023-11-29 05:57:55,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 141 transitions, 979 flow [2023-11-29 05:57:55,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 141 transitions, 969 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 05:57:55,217 INFO L231 Difference]: Finished difference. Result has 96 places, 92 transitions, 697 flow [2023-11-29 05:57:55,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=697, PETRI_PLACES=96, PETRI_TRANSITIONS=92} [2023-11-29 05:57:55,218 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 39 predicate places. [2023-11-29 05:57:55,218 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 92 transitions, 697 flow [2023-11-29 05:57:55,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 33.833333333333336) internal successors, (203), 6 states have internal predecessors, (203), 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) [2023-11-29 05:57:55,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:57:55,218 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1] [2023-11-29 05:57:55,221 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:57:55,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:57:55,419 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 05:57:55,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:57:55,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1835853831, now seen corresponding path program 3 times [2023-11-29 05:57:55,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:57:55,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [843645327] [2023-11-29 05:57:55,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:57:55,419 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 [2023-11-29 05:57:55,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:57:55,420 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 05:57:55,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:57:55,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-11-29 05:57:55,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:57:55,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 05:57:55,654 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:57:55,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-29 05:57:55,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:55,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 05:57:55,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:55,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:57:55,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:55,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 05:57:55,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:55,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 05:57:55,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:57:55,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:57:56,334 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:57:56,334 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:57:59,515 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:57:59,515 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:57:59,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [843645327] [2023-11-29 05:57:59,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [843645327] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:57:59,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:57:59,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2023-11-29 05:57:59,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369211389] [2023-11-29 05:57:59,516 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:57:59,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 05:57:59,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:57:59,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 05:57:59,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2023-11-29 05:58:11,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 56 [2023-11-29 05:58:11,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 92 transitions, 697 flow. Second operand has 26 states, 26 states have (on average 31.76923076923077) internal successors, (826), 26 states have internal predecessors, (826), 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) [2023-11-29 05:58:11,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:58:11,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 56 [2023-11-29 05:58:11,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:58:45,495 INFO L124 PetriNetUnfolderBase]: 854/1635 cut-off events. [2023-11-29 05:58:45,495 INFO L125 PetriNetUnfolderBase]: For 3603/3617 co-relation queries the response was YES. [2023-11-29 05:58:45,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5674 conditions, 1635 events. 854/1635 cut-off events. For 3603/3617 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 8542 event pairs, 529 based on Foata normal form. 12/1639 useless extension candidates. Maximal degree in co-relation 5643. Up to 1506 conditions per place. [2023-11-29 05:58:45,503 INFO L140 encePairwiseOnDemand]: 51/56 looper letters, 57 selfloop transitions, 65 changer transitions 0/128 dead transitions. [2023-11-29 05:58:45,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 128 transitions, 1265 flow [2023-11-29 05:58:45,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-29 05:58:45,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-11-29 05:58:45,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 1451 transitions. [2023-11-29 05:58:45,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5757936507936507 [2023-11-29 05:58:45,507 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 1451 transitions. [2023-11-29 05:58:45,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 1451 transitions. [2023-11-29 05:58:45,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:58:45,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 1451 transitions. [2023-11-29 05:58:45,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 32.24444444444445) internal successors, (1451), 45 states have internal predecessors, (1451), 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) [2023-11-29 05:58:45,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 56.0) internal successors, (2576), 46 states have internal predecessors, (2576), 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) [2023-11-29 05:58:45,516 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 56.0) internal successors, (2576), 46 states have internal predecessors, (2576), 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) [2023-11-29 05:58:45,517 INFO L175 Difference]: Start difference. First operand has 96 places, 92 transitions, 697 flow. Second operand 45 states and 1451 transitions. [2023-11-29 05:58:45,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 128 transitions, 1265 flow [2023-11-29 05:58:45,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 128 transitions, 1210 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-29 05:58:45,531 INFO L231 Difference]: Finished difference. Result has 150 places, 128 transitions, 1150 flow [2023-11-29 05:58:45,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=666, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1150, PETRI_PLACES=150, PETRI_TRANSITIONS=128} [2023-11-29 05:58:45,532 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 93 predicate places. [2023-11-29 05:58:45,532 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 128 transitions, 1150 flow [2023-11-29 05:58:45,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 31.76923076923077) internal successors, (826), 26 states have internal predecessors, (826), 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) [2023-11-29 05:58:45,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:58:45,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:58:45,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-11-29 05:58:45,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:58:45,735 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 05:58:45,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:58:45,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1156186017, now seen corresponding path program 2 times [2023-11-29 05:58:45,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:58:45,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [268890502] [2023-11-29 05:58:45,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:58:45,735 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 [2023-11-29 05:58:45,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:58:45,736 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 05:58:45,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:58:45,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:58:45,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:58:45,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 05:58:45,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:58:45,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:58:45,938 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:58:46,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:58:46,116 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:58:46,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [268890502] [2023-11-29 05:58:46,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [268890502] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:58:46,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:58:46,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2023-11-29 05:58:46,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780561022] [2023-11-29 05:58:46,116 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:58:46,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 05:58:46,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:58:46,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 05:58:46,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-11-29 05:58:46,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 56 [2023-11-29 05:58:46,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 128 transitions, 1150 flow. Second operand has 11 states, 11 states have (on average 33.63636363636363) internal successors, (370), 11 states have internal predecessors, (370), 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) [2023-11-29 05:58:46,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:58:46,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 56 [2023-11-29 05:58:46,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:58:47,690 INFO L124 PetriNetUnfolderBase]: 1748/3317 cut-off events. [2023-11-29 05:58:47,690 INFO L125 PetriNetUnfolderBase]: For 4433/4442 co-relation queries the response was YES. [2023-11-29 05:58:47,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11055 conditions, 3317 events. 1748/3317 cut-off events. For 4433/4442 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 20659 event pairs, 108 based on Foata normal form. 84/3401 useless extension candidates. Maximal degree in co-relation 11011. Up to 699 conditions per place. [2023-11-29 05:58:47,708 INFO L140 encePairwiseOnDemand]: 42/56 looper letters, 152 selfloop transitions, 146 changer transitions 2/307 dead transitions. [2023-11-29 05:58:47,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 307 transitions, 2687 flow [2023-11-29 05:58:47,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 05:58:47,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-29 05:58:47,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 542 transitions. [2023-11-29 05:58:47,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7445054945054945 [2023-11-29 05:58:47,710 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 542 transitions. [2023-11-29 05:58:47,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 542 transitions. [2023-11-29 05:58:47,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:58:47,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 542 transitions. [2023-11-29 05:58:47,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 41.69230769230769) internal successors, (542), 13 states have internal predecessors, (542), 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) [2023-11-29 05:58:47,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 56.0) internal successors, (784), 14 states have internal predecessors, (784), 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) [2023-11-29 05:58:47,712 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 56.0) internal successors, (784), 14 states have internal predecessors, (784), 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) [2023-11-29 05:58:47,712 INFO L175 Difference]: Start difference. First operand has 150 places, 128 transitions, 1150 flow. Second operand 13 states and 542 transitions. [2023-11-29 05:58:47,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 307 transitions, 2687 flow [2023-11-29 05:58:47,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 307 transitions, 2551 flow, removed 39 selfloop flow, removed 20 redundant places. [2023-11-29 05:58:47,731 INFO L231 Difference]: Finished difference. Result has 150 places, 249 transitions, 2338 flow [2023-11-29 05:58:47,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=1014, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2338, PETRI_PLACES=150, PETRI_TRANSITIONS=249} [2023-11-29 05:58:47,731 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 93 predicate places. [2023-11-29 05:58:47,731 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 249 transitions, 2338 flow [2023-11-29 05:58:47,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 33.63636363636363) internal successors, (370), 11 states have internal predecessors, (370), 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) [2023-11-29 05:58:47,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:58:47,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:58:47,735 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:58:47,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:58:47,935 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 05:58:47,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:58:47,935 INFO L85 PathProgramCache]: Analyzing trace with hash 523314047, now seen corresponding path program 3 times [2023-11-29 05:58:47,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:58:47,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2071626916] [2023-11-29 05:58:47,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:58:47,935 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 [2023-11-29 05:58:47,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:58:47,936 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 05:58:47,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:58:48,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 05:58:48,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:58:48,043 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 05:58:48,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:58:48,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:58:48,094 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:58:48,094 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:58:48,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2071626916] [2023-11-29 05:58:48,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2071626916] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:58:48,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:58:48,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 05:58:48,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859195009] [2023-11-29 05:58:48,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:58:48,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:58:48,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:58:48,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:58:48,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:58:48,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 56 [2023-11-29 05:58:48,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 249 transitions, 2338 flow. Second operand has 6 states, 6 states have (on average 33.833333333333336) internal successors, (203), 6 states have internal predecessors, (203), 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) [2023-11-29 05:58:48,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:58:48,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 56 [2023-11-29 05:58:48,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:58:48,921 INFO L124 PetriNetUnfolderBase]: 1697/3236 cut-off events. [2023-11-29 05:58:48,921 INFO L125 PetriNetUnfolderBase]: For 12671/12693 co-relation queries the response was YES. [2023-11-29 05:58:48,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15136 conditions, 3236 events. 1697/3236 cut-off events. For 12671/12693 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 20249 event pairs, 442 based on Foata normal form. 48/3281 useless extension candidates. Maximal degree in co-relation 15085. Up to 1987 conditions per place. [2023-11-29 05:58:48,947 INFO L140 encePairwiseOnDemand]: 50/56 looper letters, 266 selfloop transitions, 39 changer transitions 6/318 dead transitions. [2023-11-29 05:58:48,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 318 transitions, 3631 flow [2023-11-29 05:58:48,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:58:48,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:58:48,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 231 transitions. [2023-11-29 05:58:48,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6875 [2023-11-29 05:58:48,948 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 231 transitions. [2023-11-29 05:58:48,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 231 transitions. [2023-11-29 05:58:48,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:58:48,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 231 transitions. [2023-11-29 05:58:48,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 38.5) internal successors, (231), 6 states have internal predecessors, (231), 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) [2023-11-29 05:58:48,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 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) [2023-11-29 05:58:48,950 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 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) [2023-11-29 05:58:48,950 INFO L175 Difference]: Start difference. First operand has 150 places, 249 transitions, 2338 flow. Second operand 6 states and 231 transitions. [2023-11-29 05:58:48,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 318 transitions, 3631 flow [2023-11-29 05:58:49,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 318 transitions, 3431 flow, removed 89 selfloop flow, removed 1 redundant places. [2023-11-29 05:58:49,023 INFO L231 Difference]: Finished difference. Result has 157 places, 250 transitions, 2358 flow [2023-11-29 05:58:49,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=2216, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2358, PETRI_PLACES=157, PETRI_TRANSITIONS=250} [2023-11-29 05:58:49,024 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 100 predicate places. [2023-11-29 05:58:49,024 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 250 transitions, 2358 flow [2023-11-29 05:58:49,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 33.833333333333336) internal successors, (203), 6 states have internal predecessors, (203), 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) [2023-11-29 05:58:49,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:58:49,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:58:49,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-11-29 05:58:49,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:58:49,226 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 05:58:49,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:58:49,226 INFO L85 PathProgramCache]: Analyzing trace with hash 2011755301, now seen corresponding path program 4 times [2023-11-29 05:58:49,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:58:49,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1293486831] [2023-11-29 05:58:49,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:58:49,226 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 [2023-11-29 05:58:49,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:58:49,227 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 05:58:49,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:58:49,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:58:49,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:58:49,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 05:58:49,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:58:49,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:58:49,403 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:58:49,403 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:58:49,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1293486831] [2023-11-29 05:58:49,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1293486831] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:58:49,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:58:49,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 05:58:49,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721658246] [2023-11-29 05:58:49,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:58:49,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:58:49,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:58:49,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:58:49,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:58:49,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 56 [2023-11-29 05:58:49,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 250 transitions, 2358 flow. Second operand has 6 states, 6 states have (on average 33.833333333333336) internal successors, (203), 6 states have internal predecessors, (203), 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) [2023-11-29 05:58:49,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:58:49,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 56 [2023-11-29 05:58:49,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:58:50,216 INFO L124 PetriNetUnfolderBase]: 1685/3168 cut-off events. [2023-11-29 05:58:50,216 INFO L125 PetriNetUnfolderBase]: For 14464/14479 co-relation queries the response was YES. [2023-11-29 05:58:50,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14976 conditions, 3168 events. 1685/3168 cut-off events. For 14464/14479 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 19429 event pairs, 450 based on Foata normal form. 51/3216 useless extension candidates. Maximal degree in co-relation 14922. Up to 1987 conditions per place. [2023-11-29 05:58:50,240 INFO L140 encePairwiseOnDemand]: 48/56 looper letters, 242 selfloop transitions, 85 changer transitions 4/338 dead transitions. [2023-11-29 05:58:50,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 338 transitions, 3845 flow [2023-11-29 05:58:50,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 05:58:50,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 05:58:50,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 272 transitions. [2023-11-29 05:58:50,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6938775510204082 [2023-11-29 05:58:50,241 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 272 transitions. [2023-11-29 05:58:50,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 272 transitions. [2023-11-29 05:58:50,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:58:50,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 272 transitions. [2023-11-29 05:58:50,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 38.857142857142854) internal successors, (272), 7 states have internal predecessors, (272), 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) [2023-11-29 05:58:50,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 56.0) internal successors, (448), 8 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) [2023-11-29 05:58:50,242 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 56.0) internal successors, (448), 8 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) [2023-11-29 05:58:50,242 INFO L175 Difference]: Start difference. First operand has 157 places, 250 transitions, 2358 flow. Second operand 7 states and 272 transitions. [2023-11-29 05:58:50,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 338 transitions, 3845 flow [2023-11-29 05:58:50,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 338 transitions, 3715 flow, removed 20 selfloop flow, removed 4 redundant places. [2023-11-29 05:58:50,346 INFO L231 Difference]: Finished difference. Result has 162 places, 277 transitions, 2858 flow [2023-11-29 05:58:50,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=2248, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2858, PETRI_PLACES=162, PETRI_TRANSITIONS=277} [2023-11-29 05:58:50,347 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 105 predicate places. [2023-11-29 05:58:50,347 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 277 transitions, 2858 flow [2023-11-29 05:58:50,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 33.833333333333336) internal successors, (203), 6 states have internal predecessors, (203), 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) [2023-11-29 05:58:50,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:58:50,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:58:50,350 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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)] Ended with exit code 0 [2023-11-29 05:58:50,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:58:50,548 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 05:58:50,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:58:50,548 INFO L85 PathProgramCache]: Analyzing trace with hash 328612072, now seen corresponding path program 1 times [2023-11-29 05:58:50,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:58:50,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [281875681] [2023-11-29 05:58:50,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:58:50,549 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 [2023-11-29 05:58:50,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:58:50,549 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 05:58:50,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:58:50,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:50,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 05:58:50,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:58:50,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:58:50,733 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:58:50,733 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:58:50,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [281875681] [2023-11-29 05:58:50,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [281875681] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:58:50,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:58:50,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 05:58:50,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433424637] [2023-11-29 05:58:50,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:58:50,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:58:50,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:58:50,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:58:50,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:58:50,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 56 [2023-11-29 05:58:50,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 277 transitions, 2858 flow. Second operand has 6 states, 6 states have (on average 34.5) internal successors, (207), 6 states have internal predecessors, (207), 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) [2023-11-29 05:58:50,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:58:50,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 56 [2023-11-29 05:58:50,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:58:51,455 INFO L124 PetriNetUnfolderBase]: 1571/2942 cut-off events. [2023-11-29 05:58:51,455 INFO L125 PetriNetUnfolderBase]: For 14479/14488 co-relation queries the response was YES. [2023-11-29 05:58:51,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14440 conditions, 2942 events. 1571/2942 cut-off events. For 14479/14488 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 17449 event pairs, 435 based on Foata normal form. 33/2975 useless extension candidates. Maximal degree in co-relation 14383. Up to 2116 conditions per place. [2023-11-29 05:58:51,483 INFO L140 encePairwiseOnDemand]: 50/56 looper letters, 228 selfloop transitions, 48 changer transitions 8/291 dead transitions. [2023-11-29 05:58:51,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 291 transitions, 3527 flow [2023-11-29 05:58:51,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:58:51,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:58:51,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 232 transitions. [2023-11-29 05:58:51,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6904761904761905 [2023-11-29 05:58:51,484 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 232 transitions. [2023-11-29 05:58:51,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 232 transitions. [2023-11-29 05:58:51,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:58:51,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 232 transitions. [2023-11-29 05:58:51,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 38.666666666666664) internal successors, (232), 6 states have internal predecessors, (232), 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) [2023-11-29 05:58:51,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 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) [2023-11-29 05:58:51,487 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 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) [2023-11-29 05:58:51,487 INFO L175 Difference]: Start difference. First operand has 162 places, 277 transitions, 2858 flow. Second operand 6 states and 232 transitions. [2023-11-29 05:58:51,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 291 transitions, 3527 flow [2023-11-29 05:58:51,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 291 transitions, 3388 flow, removed 23 selfloop flow, removed 5 redundant places. [2023-11-29 05:58:51,550 INFO L231 Difference]: Finished difference. Result has 164 places, 277 transitions, 2871 flow [2023-11-29 05:58:51,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=2727, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2871, PETRI_PLACES=164, PETRI_TRANSITIONS=277} [2023-11-29 05:58:51,551 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 107 predicate places. [2023-11-29 05:58:51,551 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 277 transitions, 2871 flow [2023-11-29 05:58:51,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 34.5) internal successors, (207), 6 states have internal predecessors, (207), 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) [2023-11-29 05:58:51,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:58:51,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:58:51,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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)] Ended with exit code 0 [2023-11-29 05:58:51,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:58:51,752 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 05:58:51,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:58:51,752 INFO L85 PathProgramCache]: Analyzing trace with hash 676969380, now seen corresponding path program 1 times [2023-11-29 05:58:51,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:58:51,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [376220709] [2023-11-29 05:58:51,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:58:51,753 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 [2023-11-29 05:58:51,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:58:51,754 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 05:58:51,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:58:51,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:51,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 05:58:51,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:58:51,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:58:51,953 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:58:52,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:58:52,087 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:58:52,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [376220709] [2023-11-29 05:58:52,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [376220709] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:58:52,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:58:52,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-29 05:58:52,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367480248] [2023-11-29 05:58:52,088 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:58:52,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 05:58:52,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:58:52,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 05:58:52,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-29 05:58:52,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 56 [2023-11-29 05:58:52,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 277 transitions, 2871 flow. Second operand has 10 states, 10 states have (on average 34.1) internal successors, (341), 10 states have internal predecessors, (341), 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) [2023-11-29 05:58:52,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:58:52,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 56 [2023-11-29 05:58:52,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:58:53,644 INFO L124 PetriNetUnfolderBase]: 2363/4214 cut-off events. [2023-11-29 05:58:53,644 INFO L125 PetriNetUnfolderBase]: For 20645/20651 co-relation queries the response was YES. [2023-11-29 05:58:53,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21221 conditions, 4214 events. 2363/4214 cut-off events. For 20645/20651 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 24709 event pairs, 184 based on Foata normal form. 414/4628 useless extension candidates. Maximal degree in co-relation 21163. Up to 1033 conditions per place. [2023-11-29 05:58:53,678 INFO L140 encePairwiseOnDemand]: 50/56 looper letters, 357 selfloop transitions, 141 changer transitions 0/505 dead transitions. [2023-11-29 05:58:53,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 505 transitions, 6079 flow [2023-11-29 05:58:53,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:58:53,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 05:58:53,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 379 transitions. [2023-11-29 05:58:53,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.751984126984127 [2023-11-29 05:58:53,680 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 379 transitions. [2023-11-29 05:58:53,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 379 transitions. [2023-11-29 05:58:53,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:58:53,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 379 transitions. [2023-11-29 05:58:53,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 42.111111111111114) internal successors, (379), 9 states have internal predecessors, (379), 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) [2023-11-29 05:58:53,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 56.0) internal successors, (560), 10 states have internal predecessors, (560), 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) [2023-11-29 05:58:53,682 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 56.0) internal successors, (560), 10 states have internal predecessors, (560), 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) [2023-11-29 05:58:53,682 INFO L175 Difference]: Start difference. First operand has 164 places, 277 transitions, 2871 flow. Second operand 9 states and 379 transitions. [2023-11-29 05:58:53,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 505 transitions, 6079 flow [2023-11-29 05:58:53,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 505 transitions, 5961 flow, removed 11 selfloop flow, removed 5 redundant places. [2023-11-29 05:58:53,752 INFO L231 Difference]: Finished difference. Result has 167 places, 320 transitions, 3613 flow [2023-11-29 05:58:53,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=2693, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3613, PETRI_PLACES=167, PETRI_TRANSITIONS=320} [2023-11-29 05:58:53,753 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 110 predicate places. [2023-11-29 05:58:53,753 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 320 transitions, 3613 flow [2023-11-29 05:58:53,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 34.1) internal successors, (341), 10 states have internal predecessors, (341), 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) [2023-11-29 05:58:53,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:58:53,753 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:58:53,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-11-29 05:58:53,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:58:53,954 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 05:58:53,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:58:53,954 INFO L85 PathProgramCache]: Analyzing trace with hash -209045186, now seen corresponding path program 2 times [2023-11-29 05:58:53,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:58:53,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1756311729] [2023-11-29 05:58:53,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:58:53,954 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 [2023-11-29 05:58:53,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:58:53,955 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 05:58:53,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 05:58:54,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:58:54,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:58:54,148 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 05:58:54,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:58:54,767 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:58:54,767 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:58:55,985 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:58:55,985 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:58:55,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1756311729] [2023-11-29 05:58:55,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1756311729] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:58:55,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:58:55,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2023-11-29 05:58:55,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366986436] [2023-11-29 05:58:55,986 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:58:55,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 05:58:55,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:58:55,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 05:58:55,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2023-11-29 05:58:55,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 56 [2023-11-29 05:58:55,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 320 transitions, 3613 flow. Second operand has 30 states, 30 states have (on average 32.733333333333334) internal successors, (982), 30 states have internal predecessors, (982), 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) [2023-11-29 05:58:55,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:58:55,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 56 [2023-11-29 05:58:55,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:59:38,064 INFO L124 PetriNetUnfolderBase]: 7457/12998 cut-off events. [2023-11-29 05:59:38,064 INFO L125 PetriNetUnfolderBase]: For 57988/58000 co-relation queries the response was YES. [2023-11-29 05:59:38,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68516 conditions, 12998 events. 7457/12998 cut-off events. For 57988/58000 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 89153 event pairs, 188 based on Foata normal form. 270/13268 useless extension candidates. Maximal degree in co-relation 68458. Up to 3889 conditions per place. [2023-11-29 05:59:38,185 INFO L140 encePairwiseOnDemand]: 43/56 looper letters, 843 selfloop transitions, 1001 changer transitions 0/1851 dead transitions. [2023-11-29 05:59:38,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 1851 transitions, 22416 flow [2023-11-29 05:59:38,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2023-11-29 05:59:38,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2023-11-29 05:59:38,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 4009 transitions. [2023-11-29 05:59:38,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6628637566137566 [2023-11-29 05:59:38,192 INFO L72 ComplementDD]: Start complementDD. Operand 108 states and 4009 transitions. [2023-11-29 05:59:38,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 4009 transitions. [2023-11-29 05:59:38,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:59:38,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 108 states and 4009 transitions. [2023-11-29 05:59:38,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 109 states, 108 states have (on average 37.120370370370374) internal successors, (4009), 108 states have internal predecessors, (4009), 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) [2023-11-29 05:59:38,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 109 states, 109 states have (on average 56.0) internal successors, (6104), 109 states have internal predecessors, (6104), 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) [2023-11-29 05:59:38,208 INFO L81 ComplementDD]: Finished complementDD. Result has 109 states, 109 states have (on average 56.0) internal successors, (6104), 109 states have internal predecessors, (6104), 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) [2023-11-29 05:59:38,208 INFO L175 Difference]: Start difference. First operand has 167 places, 320 transitions, 3613 flow. Second operand 108 states and 4009 transitions. [2023-11-29 05:59:38,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 1851 transitions, 22416 flow [2023-11-29 05:59:38,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 1851 transitions, 21783 flow, removed 271 selfloop flow, removed 3 redundant places. [2023-11-29 05:59:38,452 INFO L231 Difference]: Finished difference. Result has 313 places, 1332 transitions, 17836 flow [2023-11-29 05:59:38,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=3446, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=108, PETRI_FLOW=17836, PETRI_PLACES=313, PETRI_TRANSITIONS=1332} [2023-11-29 05:59:38,453 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 256 predicate places. [2023-11-29 05:59:38,453 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 1332 transitions, 17836 flow [2023-11-29 05:59:38,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 32.733333333333334) internal successors, (982), 30 states have internal predecessors, (982), 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) [2023-11-29 05:59:38,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:59:38,453 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:59:38,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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)] Ended with exit code 0 [2023-11-29 05:59:38,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:59:38,654 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-29 05:59:38,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:59:38,654 INFO L85 PathProgramCache]: Analyzing trace with hash -258824420, now seen corresponding path program 3 times [2023-11-29 05:59:38,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:59:38,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1509860870] [2023-11-29 05:59:38,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:59:38,655 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 [2023-11-29 05:59:38,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:59:38,655 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 05:59:38,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4b7686-20bc-4be1-bbbc-24145eaf6eb5/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-11-29 05:59:38,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-29 05:59:38,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:59:38,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 05:59:38,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:59:38,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 05:59:38,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:59:38,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:59:38,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:59:38,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:59:39,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:59:39,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 05:59:39,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:59:39,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 05:59:39,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:59:39,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:59:40,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:59:40,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:59:40,162 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 05:59:40,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:59:40,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:59:40,165 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 05:59:40,166 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 05:59:40,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:59:40,168 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 05:59:40,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 28 [2023-11-29 05:59:40,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2023-11-29 05:59:40,624 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:59:40,624 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:00:22,013 INFO L349 Elim1Store]: treesize reduction 1055, result has 19.4 percent of original size [2023-11-29 06:00:22,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 20 new quantified variables, introduced 120 case distinctions, treesize of input 482 treesize of output 385