./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc95xx.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a605f6-8d70-4020-b6af-16d152633902/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a605f6-8d70-4020-b6af-16d152633902/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a605f6-8d70-4020-b6af-16d152633902/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a605f6-8d70-4020-b6af-16d152633902/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc95xx.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a605f6-8d70-4020-b6af-16d152633902/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a605f6-8d70-4020-b6af-16d152633902/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 0a0fd6bb20819f4c1984e3b3e8e83ec7b86578d28f1c3e6d8ae5f0c954457512 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:44:07,784 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:44:07,786 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:44:07,832 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:44:07,833 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:44:07,834 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:44:07,836 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:44:07,839 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:44:07,842 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:44:07,843 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:44:07,845 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:44:07,847 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:44:07,847 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:44:07,849 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:44:07,851 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:44:07,852 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:44:07,854 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:44:07,855 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:44:07,858 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:44:07,861 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:44:07,863 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:44:07,865 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:44:07,867 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:44:07,872 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:44:07,876 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:44:07,876 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:44:07,877 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:44:07,878 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:44:07,878 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:44:07,880 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:44:07,880 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:44:07,881 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:44:07,882 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:44:07,890 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:44:07,893 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:44:07,893 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:44:07,894 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:44:07,894 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:44:07,894 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:44:07,895 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:44:07,896 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:44:07,897 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a605f6-8d70-4020-b6af-16d152633902/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-21 01:44:07,951 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:44:07,951 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:44:07,952 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:44:07,952 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:44:07,954 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:44:07,954 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:44:07,954 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:44:07,955 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:44:07,955 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:44:07,955 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:44:07,956 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:44:07,957 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:44:07,957 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:44:07,957 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:44:07,957 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:44:07,958 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:44:07,958 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:44:07,958 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:44:07,960 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:44:07,960 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:44:07,960 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:44:07,961 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:44:07,961 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:44:07,961 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:44:07,961 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:44:07,961 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:44:07,963 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:44:07,964 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:44:07,964 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:44:07,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:44:07,965 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:44:07,965 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:44:07,965 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:44:07,965 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:44:07,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:44:07,966 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:44:07,966 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:44:07,966 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:44:07,967 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_f1a605f6-8d70-4020-b6af-16d152633902/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a605f6-8d70-4020-b6af-16d152633902/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0a0fd6bb20819f4c1984e3b3e8e83ec7b86578d28f1c3e6d8ae5f0c954457512 [2021-11-21 01:44:08,319 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:44:08,360 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:44:08,363 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:44:08,365 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:44:08,366 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:44:08,368 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a605f6-8d70-4020-b6af-16d152633902/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc95xx.cil.i [2021-11-21 01:44:08,483 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a605f6-8d70-4020-b6af-16d152633902/bin/utaipan-TEXQjIfE4P/data/65c2db795/252e32dbedad4f32b30fa3438cd46f71/FLAG7777726ec [2021-11-21 01:44:09,609 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:44:09,610 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a605f6-8d70-4020-b6af-16d152633902/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc95xx.cil.i [2021-11-21 01:44:09,670 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a605f6-8d70-4020-b6af-16d152633902/bin/utaipan-TEXQjIfE4P/data/65c2db795/252e32dbedad4f32b30fa3438cd46f71/FLAG7777726ec [2021-11-21 01:44:09,976 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a605f6-8d70-4020-b6af-16d152633902/bin/utaipan-TEXQjIfE4P/data/65c2db795/252e32dbedad4f32b30fa3438cd46f71 [2021-11-21 01:44:09,978 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:44:09,980 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:44:09,981 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:44:09,982 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:44:09,985 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:44:09,986 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:44:09" (1/1) ... [2021-11-21 01:44:09,987 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c59b093 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:09, skipping insertion in model container [2021-11-21 01:44:09,987 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:44:09" (1/1) ... [2021-11-21 01:44:09,996 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:44:10,210 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:44:13,550 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a605f6-8d70-4020-b6af-16d152633902/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc95xx.cil.i[348095,348108] [2021-11-21 01:44:13,556 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a605f6-8d70-4020-b6af-16d152633902/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc95xx.cil.i[348264,348277] [2021-11-21 01:44:13,557 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a605f6-8d70-4020-b6af-16d152633902/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc95xx.cil.i[348431,348444] [2021-11-21 01:44:13,558 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a605f6-8d70-4020-b6af-16d152633902/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc95xx.cil.i[348599,348612] [2021-11-21 01:44:13,583 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:44:13,665 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:44:14,120 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a605f6-8d70-4020-b6af-16d152633902/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc95xx.cil.i[348095,348108] [2021-11-21 01:44:14,120 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a605f6-8d70-4020-b6af-16d152633902/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc95xx.cil.i[348264,348277] [2021-11-21 01:44:14,121 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a605f6-8d70-4020-b6af-16d152633902/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc95xx.cil.i[348431,348444] [2021-11-21 01:44:14,122 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a605f6-8d70-4020-b6af-16d152633902/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc95xx.cil.i[348599,348612] [2021-11-21 01:44:14,129 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:44:14,464 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:44:14,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:14 WrapperNode [2021-11-21 01:44:14,464 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:44:14,466 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:44:14,466 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:44:14,467 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:44:14,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:14" (1/1) ... [2021-11-21 01:44:14,611 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:14" (1/1) ... [2021-11-21 01:44:14,792 INFO L137 Inliner]: procedures = 391, calls = 2962, calls flagged for inlining = 179, calls inlined = 164, statements flattened = 6208 [2021-11-21 01:44:14,793 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:44:14,794 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:44:14,794 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:44:14,794 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:44:14,804 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:14" (1/1) ... [2021-11-21 01:44:14,804 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:14" (1/1) ... [2021-11-21 01:44:14,834 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:14" (1/1) ... [2021-11-21 01:44:14,835 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:14" (1/1) ... [2021-11-21 01:44:15,117 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:14" (1/1) ... [2021-11-21 01:44:15,152 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:14" (1/1) ... [2021-11-21 01:44:15,196 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:14" (1/1) ... [2021-11-21 01:44:15,242 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:44:15,243 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:44:15,243 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:44:15,244 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:44:15,245 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:14" (1/1) ... [2021-11-21 01:44:15,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:44:15,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a605f6-8d70-4020-b6af-16d152633902/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:44:15,289 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a605f6-8d70-4020-b6af-16d152633902/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:44:15,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a605f6-8d70-4020-b6af-16d152633902/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:44:15,388 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-21 01:44:15,389 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-21 01:44:15,389 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_nway_reset [2021-11-21 01:44:15,389 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_nway_reset [2021-11-21 01:44:15,389 INFO L130 BoogieDeclarations]: Found specification of procedure smsc95xx_link_reset [2021-11-21 01:44:15,389 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc95xx_link_reset [2021-11-21 01:44:15,390 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-21 01:44:15,390 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-21 01:44:15,390 INFO L130 BoogieDeclarations]: Found specification of procedure smsc_crc [2021-11-21 01:44:15,390 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc_crc [2021-11-21 01:44:15,390 INFO L130 BoogieDeclarations]: Found specification of procedure smsc95xx_ethtool_getregslen [2021-11-21 01:44:15,391 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc95xx_ethtool_getregslen [2021-11-21 01:44:15,391 INFO L130 BoogieDeclarations]: Found specification of procedure __smsc95xx_mdio_write [2021-11-21 01:44:15,391 INFO L138 BoogieDeclarations]: Found implementation of procedure __smsc95xx_mdio_write [2021-11-21 01:44:15,391 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-21 01:44:15,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-21 01:44:15,391 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_61 [2021-11-21 01:44:15,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_61 [2021-11-21 01:44:15,392 INFO L130 BoogieDeclarations]: Found specification of procedure smsc95xx_write_reg_nopm [2021-11-21 01:44:15,392 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc95xx_write_reg_nopm [2021-11-21 01:44:15,392 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_EMGentry_exit_smsc95xx_driver_exit_6_2 [2021-11-21 01:44:15,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_EMGentry_exit_smsc95xx_driver_exit_6_2 [2021-11-21 01:44:15,392 INFO L130 BoogieDeclarations]: Found specification of procedure smsc95xx_enable_phy_wakeup_interrupts [2021-11-21 01:44:15,393 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc95xx_enable_phy_wakeup_interrupts [2021-11-21 01:44:15,393 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-21 01:44:15,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-21 01:44:15,393 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_write_cmd_nopm [2021-11-21 01:44:15,393 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-21 01:44:15,393 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-21 01:44:15,394 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-21 01:44:15,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-21 01:44:15,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:44:15,394 INFO L130 BoogieDeclarations]: Found specification of procedure smsc95xx_write_reg [2021-11-21 01:44:15,394 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc95xx_write_reg [2021-11-21 01:44:15,395 INFO L130 BoogieDeclarations]: Found specification of procedure smsc95xx_rx_csum_offload [2021-11-21 01:44:15,395 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc95xx_rx_csum_offload [2021-11-21 01:44:15,395 INFO L130 BoogieDeclarations]: Found specification of procedure smsc95xx_read_reg_nopm [2021-11-21 01:44:15,395 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc95xx_read_reg_nopm [2021-11-21 01:44:15,395 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-21 01:44:15,395 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_resume [2021-11-21 01:44:15,396 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_resume [2021-11-21 01:44:15,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-21 01:44:15,396 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-21 01:44:15,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-21 01:44:15,396 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_tx_timeout [2021-11-21 01:44:15,396 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_tx_timeout [2021-11-21 01:44:15,397 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 01:44:15,397 INFO L130 BoogieDeclarations]: Found specification of procedure skb_headroom [2021-11-21 01:44:15,397 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_headroom [2021-11-21 01:44:15,397 INFO L130 BoogieDeclarations]: Found specification of procedure smsc95xx_mdio_write_nopm [2021-11-21 01:44:15,397 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc95xx_mdio_write_nopm [2021-11-21 01:44:15,398 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-21 01:44:15,398 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-21 01:44:15,398 INFO L130 BoogieDeclarations]: Found specification of procedure smsc95xx_ethtool_get_eeprom_len [2021-11-21 01:44:15,398 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc95xx_ethtool_get_eeprom_len [2021-11-21 01:44:15,398 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_write_cmd [2021-11-21 01:44:15,398 INFO L130 BoogieDeclarations]: Found specification of procedure skb_trim [2021-11-21 01:44:15,399 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_trim [2021-11-21 01:44:15,399 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_read_cmd_nopm [2021-11-21 01:44:15,399 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-21 01:44:15,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-21 01:44:15,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 01:44:15,399 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_1 [2021-11-21 01:44:15,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_1 [2021-11-21 01:44:15,400 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_0 [2021-11-21 01:44:15,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_0 [2021-11-21 01:44:15,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:44:15,400 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-21 01:44:15,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-21 01:44:15,401 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-21 01:44:15,401 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-21 01:44:15,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 01:44:15,401 INFO L130 BoogieDeclarations]: Found specification of procedure smsc95xx_start_rx_path [2021-11-21 01:44:15,401 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc95xx_start_rx_path [2021-11-21 01:44:15,401 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-21 01:44:15,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-21 01:44:15,402 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_open [2021-11-21 01:44:15,402 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_open [2021-11-21 01:44:15,402 INFO L130 BoogieDeclarations]: Found specification of procedure __smsc95xx_write_reg [2021-11-21 01:44:15,402 INFO L138 BoogieDeclarations]: Found implementation of procedure __smsc95xx_write_reg [2021-11-21 01:44:15,402 INFO L130 BoogieDeclarations]: Found specification of procedure smsc95xx_set_features [2021-11-21 01:44:15,403 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc95xx_set_features [2021-11-21 01:44:15,403 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_spin_lock [2021-11-21 01:44:15,403 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_spin_lock [2021-11-21 01:44:15,403 INFO L130 BoogieDeclarations]: Found specification of procedure smsc95xx_wait_eeprom [2021-11-21 01:44:15,403 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc95xx_wait_eeprom [2021-11-21 01:44:15,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:44:15,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:44:15,404 INFO L130 BoogieDeclarations]: Found specification of procedure __smsc95xx_read_reg [2021-11-21 01:44:15,404 INFO L138 BoogieDeclarations]: Found implementation of procedure __smsc95xx_read_reg [2021-11-21 01:44:15,404 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2021-11-21 01:44:15,404 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2021-11-21 01:44:15,405 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2021-11-21 01:44:15,405 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2021-11-21 01:44:15,405 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-21 01:44:15,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-21 01:44:15,405 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-21 01:44:15,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-21 01:44:15,405 INFO L130 BoogieDeclarations]: Found specification of procedure skb_push [2021-11-21 01:44:15,406 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_push [2021-11-21 01:44:15,406 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-21 01:44:15,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-21 01:44:15,406 INFO L130 BoogieDeclarations]: Found specification of procedure smsc95xx_reset [2021-11-21 01:44:15,406 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc95xx_reset [2021-11-21 01:44:15,406 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~u8~0~X~~u8~0~X~~u16~0~X~~u16~0~X~$Pointer$~X~~u16~0~TO~int [2021-11-21 01:44:15,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~u8~0~X~~u8~0~X~~u16~0~X~~u16~0~X~$Pointer$~X~~u16~0~TO~int [2021-11-21 01:44:15,407 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_stop [2021-11-21 01:44:15,407 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_stop [2021-11-21 01:44:15,407 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_mac_cr_lock_of_smsc95xx_priv [2021-11-21 01:44:15,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_mac_cr_lock_of_smsc95xx_priv [2021-11-21 01:44:15,408 INFO L130 BoogieDeclarations]: Found specification of procedure smsc95xx_read_reg [2021-11-21 01:44:15,408 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc95xx_read_reg [2021-11-21 01:44:15,408 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-21 01:44:15,408 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-21 01:44:15,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-21 01:44:15,408 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-21 01:44:15,409 INFO L130 BoogieDeclarations]: Found specification of procedure smsc95xx_mdio_write [2021-11-21 01:44:15,409 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc95xx_mdio_write [2021-11-21 01:44:15,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:44:15,409 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-11-21 01:44:15,409 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-11-21 01:44:15,409 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 01:44:15,410 INFO L130 BoogieDeclarations]: Found specification of procedure smsc95xx_enter_suspend1 [2021-11-21 01:44:15,410 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc95xx_enter_suspend1 [2021-11-21 01:44:15,410 INFO L130 BoogieDeclarations]: Found specification of procedure smsc95xx_enter_suspend2 [2021-11-21 01:44:15,410 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc95xx_enter_suspend2 [2021-11-21 01:44:15,410 INFO L130 BoogieDeclarations]: Found specification of procedure smsc95xx_read_eeprom [2021-11-21 01:44:15,410 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc95xx_read_eeprom [2021-11-21 01:44:15,411 INFO L130 BoogieDeclarations]: Found specification of procedure smsc95xx_set_multicast [2021-11-21 01:44:15,411 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc95xx_set_multicast [2021-11-21 01:44:15,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 01:44:15,411 INFO L130 BoogieDeclarations]: Found specification of procedure skb_checksum_start_offset [2021-11-21 01:44:15,411 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_checksum_start_offset [2021-11-21 01:44:15,411 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-21 01:44:15,412 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-21 01:44:15,412 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-11-21 01:44:15,412 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-11-21 01:44:15,412 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-21 01:44:15,412 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-21 01:44:15,412 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-21 01:44:15,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-21 01:44:15,413 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-21 01:44:15,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-21 01:44:15,413 INFO L130 BoogieDeclarations]: Found specification of procedure smsc95xx_mdio_read [2021-11-21 01:44:15,413 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc95xx_mdio_read [2021-11-21 01:44:15,413 INFO L130 BoogieDeclarations]: Found specification of procedure __smsc95xx_phy_wait_not_busy [2021-11-21 01:44:15,413 INFO L138 BoogieDeclarations]: Found implementation of procedure __smsc95xx_phy_wait_not_busy [2021-11-21 01:44:15,414 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_disconnect [2021-11-21 01:44:15,414 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_disconnect [2021-11-21 01:44:15,414 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_instance_release_2_4 [2021-11-21 01:44:15,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_instance_release_2_4 [2021-11-21 01:44:15,414 INFO L130 BoogieDeclarations]: Found specification of procedure smsc95xx_write_reg_async [2021-11-21 01:44:15,414 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc95xx_write_reg_async [2021-11-21 01:44:15,415 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-21 01:44:15,415 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-21 01:44:15,415 INFO L130 BoogieDeclarations]: Found specification of procedure smsc95xx_mdio_read_nopm [2021-11-21 01:44:15,415 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc95xx_mdio_read_nopm [2021-11-21 01:44:15,415 INFO L130 BoogieDeclarations]: Found specification of procedure smsc95xx_resume [2021-11-21 01:44:15,415 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc95xx_resume [2021-11-21 01:44:15,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 01:44:15,416 INFO L130 BoogieDeclarations]: Found specification of procedure skb_pull [2021-11-21 01:44:15,416 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_pull [2021-11-21 01:44:15,416 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-21 01:44:15,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-21 01:44:15,416 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_read_cmd [2021-11-21 01:44:15,417 INFO L130 BoogieDeclarations]: Found specification of procedure __smsc95xx_mdio_read [2021-11-21 01:44:15,417 INFO L138 BoogieDeclarations]: Found implementation of procedure __smsc95xx_mdio_read [2021-11-21 01:44:15,417 INFO L130 BoogieDeclarations]: Found specification of procedure smsc95xx_eeprom_confirm_not_busy [2021-11-21 01:44:15,417 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc95xx_eeprom_confirm_not_busy [2021-11-21 01:44:15,417 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-21 01:44:15,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-21 01:44:15,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:44:15,418 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-21 01:44:15,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-21 01:44:16,415 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:44:16,421 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:44:16,790 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-21 01:44:28,117 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-21 01:44:28,189 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:44:29,412 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:44:29,414 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-21 01:44:29,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:44:29 BoogieIcfgContainer [2021-11-21 01:44:29,421 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:44:29,424 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:44:29,425 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:44:29,429 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:44:29,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:44:09" (1/3) ... [2021-11-21 01:44:29,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6196cad9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:44:29, skipping insertion in model container [2021-11-21 01:44:29,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:14" (2/3) ... [2021-11-21 01:44:29,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6196cad9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:44:29, skipping insertion in model container [2021-11-21 01:44:29,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:44:29" (3/3) ... [2021-11-21 01:44:29,435 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc95xx.cil.i [2021-11-21 01:44:29,445 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:44:29,445 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-21 01:44:29,530 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:44:29,554 INFO L339 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 01:44:29,565 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-21 01:44:29,634 INFO L276 IsEmpty]: Start isEmpty. Operand has 1274 states, 809 states have (on average 1.3868974042027193) internal successors, (1122), 815 states have internal predecessors, (1122), 386 states have call successors, (386), 77 states have call predecessors, (386), 76 states have return successors, (379), 379 states have call predecessors, (379), 379 states have call successors, (379) [2021-11-21 01:44:29,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-11-21 01:44:29,663 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:44:29,664 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:44:29,664 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:44:29,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:44:29,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1915395822, now seen corresponding path program 1 times [2021-11-21 01:44:29,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:44:29,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974793919] [2021-11-21 01:44:29,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:44:29,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:44:30,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:44:30,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1263 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1263 trivial. 0 not checked. [2021-11-21 01:44:30,709 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:44:30,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974793919] [2021-11-21 01:44:30,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974793919] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:44:30,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:44:30,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:44:30,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248181980] [2021-11-21 01:44:30,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:44:30,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:44:30,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:44:30,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:44:30,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:44:30,779 INFO L87 Difference]: Start difference. First operand has 1274 states, 809 states have (on average 1.3868974042027193) internal successors, (1122), 815 states have internal predecessors, (1122), 386 states have call successors, (386), 77 states have call predecessors, (386), 76 states have return successors, (379), 379 states have call predecessors, (379), 379 states have call successors, (379) Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-21 01:44:33,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:44:33,298 INFO L93 Difference]: Finished difference Result 3667 states and 5494 transitions. [2021-11-21 01:44:33,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:44:33,301 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 205 [2021-11-21 01:44:33,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:44:33,362 INFO L225 Difference]: With dead ends: 3667 [2021-11-21 01:44:33,362 INFO L226 Difference]: Without dead ends: 2419 [2021-11-21 01:44:33,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:44:33,394 INFO L933 BasicCegarLoop]: 1941 mSDtfsCounter, 1738 mSDsluCounter, 1829 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1738 SdHoareTripleChecker+Valid, 3513 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:44:33,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1738 Valid, 3513 Invalid, 571 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [9 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-21 01:44:33,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2419 states. [2021-11-21 01:44:33,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2419 to 2415. [2021-11-21 01:44:33,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2415 states, 1558 states have (on average 1.3844672657252888) internal successors, (2157), 1569 states have internal predecessors, (2157), 706 states have call successors, (706), 149 states have call predecessors, (706), 148 states have return successors, (702), 702 states have call predecessors, (702), 702 states have call successors, (702) [2021-11-21 01:44:33,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2415 states to 2415 states and 3565 transitions. [2021-11-21 01:44:33,872 INFO L78 Accepts]: Start accepts. Automaton has 2415 states and 3565 transitions. Word has length 205 [2021-11-21 01:44:33,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:44:33,878 INFO L470 AbstractCegarLoop]: Abstraction has 2415 states and 3565 transitions. [2021-11-21 01:44:33,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-21 01:44:33,881 INFO L276 IsEmpty]: Start isEmpty. Operand 2415 states and 3565 transitions. [2021-11-21 01:44:33,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-11-21 01:44:33,900 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:44:33,907 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 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, 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, 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, 1, 1, 1] [2021-11-21 01:44:33,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:44:33,908 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:44:33,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:44:33,909 INFO L85 PathProgramCache]: Analyzing trace with hash -287397039, now seen corresponding path program 1 times [2021-11-21 01:44:33,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:44:33,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932259341] [2021-11-21 01:44:33,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:44:33,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:44:34,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:44:34,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2021-11-21 01:44:34,275 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:44:34,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932259341] [2021-11-21 01:44:34,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932259341] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:44:34,276 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:44:34,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:44:34,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890720121] [2021-11-21 01:44:34,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:44:34,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:44:34,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:44:34,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:44:34,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:44:34,280 INFO L87 Difference]: Start difference. First operand 2415 states and 3565 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-21 01:44:36,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:44:36,359 INFO L93 Difference]: Finished difference Result 5752 states and 8436 transitions. [2021-11-21 01:44:36,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:44:36,360 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 217 [2021-11-21 01:44:36,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:44:36,395 INFO L225 Difference]: With dead ends: 5752 [2021-11-21 01:44:36,395 INFO L226 Difference]: Without dead ends: 3374 [2021-11-21 01:44:36,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:44:36,411 INFO L933 BasicCegarLoop]: 1968 mSDtfsCounter, 1564 mSDsluCounter, 1782 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1564 SdHoareTripleChecker+Valid, 3518 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:44:36,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1564 Valid, 3518 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-21 01:44:36,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3374 states. [2021-11-21 01:44:36,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3374 to 3347. [2021-11-21 01:44:36,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3347 states, 2138 states have (on average 1.3634237605238542) internal successors, (2915), 2157 states have internal predecessors, (2915), 985 states have call successors, (985), 222 states have call predecessors, (985), 221 states have return successors, (981), 976 states have call predecessors, (981), 981 states have call successors, (981) [2021-11-21 01:44:36,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3347 states to 3347 states and 4881 transitions. [2021-11-21 01:44:36,650 INFO L78 Accepts]: Start accepts. Automaton has 3347 states and 4881 transitions. Word has length 217 [2021-11-21 01:44:36,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:44:36,651 INFO L470 AbstractCegarLoop]: Abstraction has 3347 states and 4881 transitions. [2021-11-21 01:44:36,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-21 01:44:36,652 INFO L276 IsEmpty]: Start isEmpty. Operand 3347 states and 4881 transitions. [2021-11-21 01:44:36,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-11-21 01:44:36,664 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:44:36,664 INFO L514 BasicCegarLoop]: trace histogram [22, 18, 18, 18, 18, 18, 18, 5, 5, 2, 2, 2, 2, 2, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:44:36,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:44:36,665 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:44:36,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:44:36,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1387380606, now seen corresponding path program 1 times [2021-11-21 01:44:36,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:44:36,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098288987] [2021-11-21 01:44:36,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:44:36,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:44:36,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:44:37,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1415 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1415 trivial. 0 not checked. [2021-11-21 01:44:37,258 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:44:37,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098288987] [2021-11-21 01:44:37,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098288987] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:44:37,259 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:44:37,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:44:37,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637483139] [2021-11-21 01:44:37,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:44:37,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:44:37,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:44:37,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:44:37,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:44:37,262 INFO L87 Difference]: Start difference. First operand 3347 states and 4881 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-21 01:44:39,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:44:39,865 INFO L93 Difference]: Finished difference Result 3353 states and 4886 transitions. [2021-11-21 01:44:39,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:44:39,866 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 249 [2021-11-21 01:44:39,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:44:39,905 INFO L225 Difference]: With dead ends: 3353 [2021-11-21 01:44:39,906 INFO L226 Difference]: Without dead ends: 3351 [2021-11-21 01:44:39,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:44:39,915 INFO L933 BasicCegarLoop]: 1587 mSDtfsCounter, 1791 mSDsluCounter, 3699 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1802 SdHoareTripleChecker+Valid, 4748 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:44:39,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1802 Valid, 4748 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-21 01:44:39,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3351 states. [2021-11-21 01:44:40,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3351 to 3351. [2021-11-21 01:44:40,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3351 states, 2141 states have (on average 1.3629145259224662) internal successors, (2918), 2160 states have internal predecessors, (2918), 985 states have call successors, (985), 223 states have call predecessors, (985), 222 states have return successors, (981), 976 states have call predecessors, (981), 981 states have call successors, (981) [2021-11-21 01:44:40,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3351 states to 3351 states and 4884 transitions. [2021-11-21 01:44:40,220 INFO L78 Accepts]: Start accepts. Automaton has 3351 states and 4884 transitions. Word has length 249 [2021-11-21 01:44:40,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:44:40,223 INFO L470 AbstractCegarLoop]: Abstraction has 3351 states and 4884 transitions. [2021-11-21 01:44:40,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-21 01:44:40,223 INFO L276 IsEmpty]: Start isEmpty. Operand 3351 states and 4884 transitions. [2021-11-21 01:44:40,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-11-21 01:44:40,234 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:44:40,235 INFO L514 BasicCegarLoop]: trace histogram [22, 18, 18, 18, 18, 18, 18, 5, 5, 2, 2, 2, 2, 2, 2, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:44:40,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 01:44:40,236 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:44:40,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:44:40,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1224568449, now seen corresponding path program 1 times [2021-11-21 01:44:40,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:44:40,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498817802] [2021-11-21 01:44:40,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:44:40,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:44:40,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:44:40,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1417 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1415 trivial. 0 not checked. [2021-11-21 01:44:40,749 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:44:40,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498817802] [2021-11-21 01:44:40,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498817802] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:44:40,750 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:44:40,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:44:40,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944637288] [2021-11-21 01:44:40,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:44:40,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:44:40,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:44:40,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:44:40,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:44:40,753 INFO L87 Difference]: Start difference. First operand 3351 states and 4884 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-21 01:44:43,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:44:43,167 INFO L93 Difference]: Finished difference Result 3357 states and 4889 transitions. [2021-11-21 01:44:43,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:44:43,168 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 254 [2021-11-21 01:44:43,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:44:43,199 INFO L225 Difference]: With dead ends: 3357 [2021-11-21 01:44:43,199 INFO L226 Difference]: Without dead ends: 3355 [2021-11-21 01:44:43,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:44:43,208 INFO L933 BasicCegarLoop]: 1590 mSDtfsCounter, 1786 mSDsluCounter, 3699 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1796 SdHoareTripleChecker+Valid, 4751 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:44:43,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1796 Valid, 4751 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-21 01:44:43,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3355 states. [2021-11-21 01:44:43,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3355 to 3355. [2021-11-21 01:44:43,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3355 states, 2144 states have (on average 1.3624067164179106) internal successors, (2921), 2163 states have internal predecessors, (2921), 985 states have call successors, (985), 224 states have call predecessors, (985), 223 states have return successors, (981), 976 states have call predecessors, (981), 981 states have call successors, (981) [2021-11-21 01:44:43,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3355 states to 3355 states and 4887 transitions. [2021-11-21 01:44:43,488 INFO L78 Accepts]: Start accepts. Automaton has 3355 states and 4887 transitions. Word has length 254 [2021-11-21 01:44:43,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:44:43,495 INFO L470 AbstractCegarLoop]: Abstraction has 3355 states and 4887 transitions. [2021-11-21 01:44:43,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-21 01:44:43,496 INFO L276 IsEmpty]: Start isEmpty. Operand 3355 states and 4887 transitions. [2021-11-21 01:44:43,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-11-21 01:44:43,506 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:44:43,506 INFO L514 BasicCegarLoop]: trace histogram [22, 18, 18, 18, 18, 18, 18, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 1, 1, 1] [2021-11-21 01:44:43,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 01:44:43,507 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:44:43,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:44:43,508 INFO L85 PathProgramCache]: Analyzing trace with hash -896755335, now seen corresponding path program 1 times [2021-11-21 01:44:43,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:44:43,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223991430] [2021-11-21 01:44:43,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:44:43,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:44:43,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:44:43,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1417 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1413 trivial. 0 not checked. [2021-11-21 01:44:43,879 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:44:43,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223991430] [2021-11-21 01:44:43,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223991430] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:44:43,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:44:43,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:44:43,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293626984] [2021-11-21 01:44:43,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:44:43,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:44:43,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:44:43,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:44:43,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:44:43,884 INFO L87 Difference]: Start difference. First operand 3355 states and 4887 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-21 01:44:47,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:44:47,025 INFO L93 Difference]: Finished difference Result 3361 states and 4892 transitions. [2021-11-21 01:44:47,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:44:47,026 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 257 [2021-11-21 01:44:47,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:44:47,058 INFO L225 Difference]: With dead ends: 3361 [2021-11-21 01:44:47,058 INFO L226 Difference]: Without dead ends: 3359 [2021-11-21 01:44:47,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:44:47,063 INFO L933 BasicCegarLoop]: 1590 mSDtfsCounter, 1787 mSDsluCounter, 3699 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1796 SdHoareTripleChecker+Valid, 4751 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:44:47,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1796 Valid, 4751 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-21 01:44:47,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3359 states. [2021-11-21 01:44:47,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3359 to 3359. [2021-11-21 01:44:47,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3359 states, 2147 states have (on average 1.3619003260363298) internal successors, (2924), 2166 states have internal predecessors, (2924), 985 states have call successors, (985), 225 states have call predecessors, (985), 224 states have return successors, (981), 976 states have call predecessors, (981), 981 states have call successors, (981) [2021-11-21 01:44:47,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3359 states to 3359 states and 4890 transitions. [2021-11-21 01:44:47,364 INFO L78 Accepts]: Start accepts. Automaton has 3359 states and 4890 transitions. Word has length 257 [2021-11-21 01:44:47,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:44:47,367 INFO L470 AbstractCegarLoop]: Abstraction has 3359 states and 4890 transitions. [2021-11-21 01:44:47,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-21 01:44:47,369 INFO L276 IsEmpty]: Start isEmpty. Operand 3359 states and 4890 transitions. [2021-11-21 01:44:47,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-11-21 01:44:47,380 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:44:47,381 INFO L514 BasicCegarLoop]: trace histogram [22, 18, 18, 18, 18, 18, 18, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:44:47,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 01:44:47,381 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:44:47,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:44:47,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1050340639, now seen corresponding path program 1 times [2021-11-21 01:44:47,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:44:47,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493956354] [2021-11-21 01:44:47,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:44:47,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:44:47,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:44:47,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1433 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1427 trivial. 0 not checked. [2021-11-21 01:44:47,765 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:44:47,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493956354] [2021-11-21 01:44:47,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493956354] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:44:47,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:44:47,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:44:47,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317074496] [2021-11-21 01:44:47,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:44:47,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:44:47,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:44:47,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:44:47,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:44:47,770 INFO L87 Difference]: Start difference. First operand 3359 states and 4890 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-21 01:44:50,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:44:50,032 INFO L93 Difference]: Finished difference Result 3365 states and 4895 transitions. [2021-11-21 01:44:50,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:44:50,034 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 264 [2021-11-21 01:44:50,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:44:50,063 INFO L225 Difference]: With dead ends: 3365 [2021-11-21 01:44:50,063 INFO L226 Difference]: Without dead ends: 3363 [2021-11-21 01:44:50,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:44:50,067 INFO L933 BasicCegarLoop]: 1590 mSDtfsCounter, 1786 mSDsluCounter, 3699 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1794 SdHoareTripleChecker+Valid, 4751 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:44:50,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1794 Valid, 4751 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-21 01:44:50,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3363 states. [2021-11-21 01:44:50,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3363 to 3363. [2021-11-21 01:44:50,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3363 states, 2150 states have (on average 1.3613953488372093) internal successors, (2927), 2169 states have internal predecessors, (2927), 985 states have call successors, (985), 226 states have call predecessors, (985), 225 states have return successors, (981), 976 states have call predecessors, (981), 981 states have call successors, (981) [2021-11-21 01:44:50,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3363 states to 3363 states and 4893 transitions. [2021-11-21 01:44:50,321 INFO L78 Accepts]: Start accepts. Automaton has 3363 states and 4893 transitions. Word has length 264 [2021-11-21 01:44:50,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:44:50,323 INFO L470 AbstractCegarLoop]: Abstraction has 3363 states and 4893 transitions. [2021-11-21 01:44:50,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-21 01:44:50,324 INFO L276 IsEmpty]: Start isEmpty. Operand 3363 states and 4893 transitions. [2021-11-21 01:44:50,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2021-11-21 01:44:50,338 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:44:50,338 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 8, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:44:50,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 01:44:50,339 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:44:50,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:44:50,339 INFO L85 PathProgramCache]: Analyzing trace with hash -34092734, now seen corresponding path program 1 times [2021-11-21 01:44:50,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:44:50,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323098621] [2021-11-21 01:44:50,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:44:50,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:44:50,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:44:50,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2021-11-21 01:44:50,668 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:44:50,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323098621] [2021-11-21 01:44:50,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323098621] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:44:50,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:44:50,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:44:50,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712571191] [2021-11-21 01:44:50,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:44:50,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:44:50,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:44:50,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:44:50,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:44:50,672 INFO L87 Difference]: Start difference. First operand 3363 states and 4893 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-21 01:44:52,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:44:52,815 INFO L93 Difference]: Finished difference Result 8956 states and 13024 transitions. [2021-11-21 01:44:52,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:44:52,816 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) Word has length 357 [2021-11-21 01:44:52,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:44:52,874 INFO L225 Difference]: With dead ends: 8956 [2021-11-21 01:44:52,874 INFO L226 Difference]: Without dead ends: 5630 [2021-11-21 01:44:52,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:44:52,896 INFO L933 BasicCegarLoop]: 1879 mSDtfsCounter, 1279 mSDsluCounter, 1821 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1279 SdHoareTripleChecker+Valid, 3444 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:44:52,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1279 Valid, 3444 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-21 01:44:52,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5630 states. [2021-11-21 01:44:53,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5630 to 5583. [2021-11-21 01:44:53,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5583 states, 3592 states have (on average 1.361358574610245) internal successors, (4890), 3631 states have internal predecessors, (4890), 1608 states have call successors, (1608), 381 states have call predecessors, (1608), 380 states have return successors, (1604), 1585 states have call predecessors, (1604), 1604 states have call successors, (1604) [2021-11-21 01:44:53,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5583 states to 5583 states and 8102 transitions. [2021-11-21 01:44:53,356 INFO L78 Accepts]: Start accepts. Automaton has 5583 states and 8102 transitions. Word has length 357 [2021-11-21 01:44:53,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:44:53,357 INFO L470 AbstractCegarLoop]: Abstraction has 5583 states and 8102 transitions. [2021-11-21 01:44:53,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-21 01:44:53,358 INFO L276 IsEmpty]: Start isEmpty. Operand 5583 states and 8102 transitions. [2021-11-21 01:44:53,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2021-11-21 01:44:53,372 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:44:53,372 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 8, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:44:53,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 01:44:53,373 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:44:53,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:44:53,375 INFO L85 PathProgramCache]: Analyzing trace with hash -138235412, now seen corresponding path program 1 times [2021-11-21 01:44:53,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:44:53,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488719135] [2021-11-21 01:44:53,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:44:53,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:44:53,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:44:53,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2021-11-21 01:44:53,678 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:44:53,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488719135] [2021-11-21 01:44:53,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488719135] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:44:53,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:44:53,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:44:53,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741858597] [2021-11-21 01:44:53,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:44:53,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:44:53,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:44:53,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:44:53,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:44:53,682 INFO L87 Difference]: Start difference. First operand 5583 states and 8102 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-21 01:44:55,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:44:55,920 INFO L93 Difference]: Finished difference Result 12725 states and 18458 transitions. [2021-11-21 01:44:55,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:44:55,921 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) Word has length 351 [2021-11-21 01:44:55,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:44:55,975 INFO L225 Difference]: With dead ends: 12725 [2021-11-21 01:44:55,975 INFO L226 Difference]: Without dead ends: 7179 [2021-11-21 01:44:56,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:44:56,006 INFO L933 BasicCegarLoop]: 1957 mSDtfsCounter, 1534 mSDsluCounter, 1822 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1534 SdHoareTripleChecker+Valid, 3529 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:44:56,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1534 Valid, 3529 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-21 01:44:56,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7179 states. [2021-11-21 01:44:56,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7179 to 7130. [2021-11-21 01:44:56,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7130 states, 4586 states have (on average 1.3610989969472307) internal successors, (6242), 4651 states have internal predecessors, (6242), 2045 states have call successors, (2045), 497 states have call predecessors, (2045), 496 states have return successors, (2041), 1994 states have call predecessors, (2041), 2041 states have call successors, (2041) [2021-11-21 01:44:56,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7130 states to 7130 states and 10328 transitions. [2021-11-21 01:44:56,622 INFO L78 Accepts]: Start accepts. Automaton has 7130 states and 10328 transitions. Word has length 351 [2021-11-21 01:44:56,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:44:56,623 INFO L470 AbstractCegarLoop]: Abstraction has 7130 states and 10328 transitions. [2021-11-21 01:44:56,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-21 01:44:56,624 INFO L276 IsEmpty]: Start isEmpty. Operand 7130 states and 10328 transitions. [2021-11-21 01:44:56,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-11-21 01:44:56,634 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:44:56,635 INFO L514 BasicCegarLoop]: trace histogram [22, 18, 18, 18, 18, 18, 18, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:44:56,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 01:44:56,635 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:44:56,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:44:56,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1322092226, now seen corresponding path program 1 times [2021-11-21 01:44:56,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:44:56,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356328345] [2021-11-21 01:44:56,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:44:56,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:44:56,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:44:57,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1447 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1439 trivial. 0 not checked. [2021-11-21 01:44:57,029 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:44:57,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356328345] [2021-11-21 01:44:57,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356328345] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:44:57,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:44:57,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:44:57,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980580299] [2021-11-21 01:44:57,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:44:57,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:44:57,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:44:57,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:44:57,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:44:57,034 INFO L87 Difference]: Start difference. First operand 7130 states and 10328 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-21 01:44:58,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:44:58,831 INFO L93 Difference]: Finished difference Result 7136 states and 10333 transitions. [2021-11-21 01:44:58,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:44:58,832 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 269 [2021-11-21 01:44:58,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:44:58,872 INFO L225 Difference]: With dead ends: 7136 [2021-11-21 01:44:58,873 INFO L226 Difference]: Without dead ends: 7134 [2021-11-21 01:44:58,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:44:58,879 INFO L933 BasicCegarLoop]: 1590 mSDtfsCounter, 1786 mSDsluCounter, 3699 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1793 SdHoareTripleChecker+Valid, 4751 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:44:58,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1793 Valid, 4751 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-21 01:44:58,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7134 states. [2021-11-21 01:44:59,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7134 to 7134. [2021-11-21 01:44:59,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7134 states, 4589 states have (on average 1.3608629331008935) internal successors, (6245), 4654 states have internal predecessors, (6245), 2045 states have call successors, (2045), 498 states have call predecessors, (2045), 497 states have return successors, (2041), 1994 states have call predecessors, (2041), 2041 states have call successors, (2041) [2021-11-21 01:44:59,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7134 states to 7134 states and 10331 transitions. [2021-11-21 01:44:59,312 INFO L78 Accepts]: Start accepts. Automaton has 7134 states and 10331 transitions. Word has length 269 [2021-11-21 01:44:59,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:44:59,313 INFO L470 AbstractCegarLoop]: Abstraction has 7134 states and 10331 transitions. [2021-11-21 01:44:59,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-21 01:44:59,314 INFO L276 IsEmpty]: Start isEmpty. Operand 7134 states and 10331 transitions. [2021-11-21 01:44:59,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2021-11-21 01:44:59,324 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:44:59,325 INFO L514 BasicCegarLoop]: trace histogram [22, 18, 18, 18, 18, 18, 18, 6, 5, 5, 5, 5, 2, 2, 2, 2, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:44:59,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-21 01:44:59,325 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:44:59,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:44:59,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1206279615, now seen corresponding path program 1 times [2021-11-21 01:44:59,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:44:59,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75862803] [2021-11-21 01:44:59,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:44:59,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:44:59,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:44:59,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1464 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1454 trivial. 0 not checked. [2021-11-21 01:44:59,761 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:44:59,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75862803] [2021-11-21 01:44:59,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75862803] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:44:59,762 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:44:59,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:44:59,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384253005] [2021-11-21 01:44:59,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:44:59,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:44:59,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:44:59,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:44:59,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:44:59,764 INFO L87 Difference]: Start difference. First operand 7134 states and 10331 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (36), 3 states have call predecessors, (36), 1 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-21 01:45:02,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:02,241 INFO L93 Difference]: Finished difference Result 7140 states and 10336 transitions. [2021-11-21 01:45:02,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:45:02,241 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (36), 3 states have call predecessors, (36), 1 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) Word has length 273 [2021-11-21 01:45:02,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:02,282 INFO L225 Difference]: With dead ends: 7140 [2021-11-21 01:45:02,282 INFO L226 Difference]: Without dead ends: 7138 [2021-11-21 01:45:02,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:45:02,288 INFO L933 BasicCegarLoop]: 1590 mSDtfsCounter, 1786 mSDsluCounter, 3699 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1792 SdHoareTripleChecker+Valid, 4751 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:02,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1792 Valid, 4751 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-21 01:45:02,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7138 states. [2021-11-21 01:45:02,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7138 to 7138. [2021-11-21 01:45:02,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7138 states, 4592 states have (on average 1.3606271777003485) internal successors, (6248), 4657 states have internal predecessors, (6248), 2045 states have call successors, (2045), 499 states have call predecessors, (2045), 498 states have return successors, (2041), 1994 states have call predecessors, (2041), 2041 states have call successors, (2041) [2021-11-21 01:45:02,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7138 states to 7138 states and 10334 transitions. [2021-11-21 01:45:02,763 INFO L78 Accepts]: Start accepts. Automaton has 7138 states and 10334 transitions. Word has length 273 [2021-11-21 01:45:02,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:02,764 INFO L470 AbstractCegarLoop]: Abstraction has 7138 states and 10334 transitions. [2021-11-21 01:45:02,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (36), 3 states have call predecessors, (36), 1 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-21 01:45:02,765 INFO L276 IsEmpty]: Start isEmpty. Operand 7138 states and 10334 transitions. [2021-11-21 01:45:02,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-11-21 01:45:02,775 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:02,775 INFO L514 BasicCegarLoop]: trace histogram [22, 18, 18, 18, 18, 18, 18, 7, 6, 6, 5, 5, 2, 2, 2, 2, 2, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:45:02,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-21 01:45:02,776 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:45:02,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:02,777 INFO L85 PathProgramCache]: Analyzing trace with hash 900928994, now seen corresponding path program 1 times [2021-11-21 01:45:02,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:02,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391590636] [2021-11-21 01:45:02,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:02,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:02,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:03,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1487 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 1475 trivial. 0 not checked. [2021-11-21 01:45:03,072 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:03,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391590636] [2021-11-21 01:45:03,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391590636] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:45:03,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:45:03,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:45:03,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014350495] [2021-11-21 01:45:03,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:03,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:45:03,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:03,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:45:03,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:45:03,076 INFO L87 Difference]: Start difference. First operand 7138 states and 10334 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-21 01:45:05,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:05,632 INFO L93 Difference]: Finished difference Result 7144 states and 10339 transitions. [2021-11-21 01:45:05,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:45:05,637 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 279 [2021-11-21 01:45:05,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:05,672 INFO L225 Difference]: With dead ends: 7144 [2021-11-21 01:45:05,672 INFO L226 Difference]: Without dead ends: 7142 [2021-11-21 01:45:05,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:45:05,678 INFO L933 BasicCegarLoop]: 1590 mSDtfsCounter, 1786 mSDsluCounter, 3699 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1791 SdHoareTripleChecker+Valid, 4751 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:05,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1791 Valid, 4751 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-21 01:45:05,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7142 states. [2021-11-21 01:45:06,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7142 to 7142. [2021-11-21 01:45:06,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7142 states, 4595 states have (on average 1.360391730141458) internal successors, (6251), 4660 states have internal predecessors, (6251), 2045 states have call successors, (2045), 500 states have call predecessors, (2045), 499 states have return successors, (2041), 1994 states have call predecessors, (2041), 2041 states have call successors, (2041) [2021-11-21 01:45:06,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7142 states to 7142 states and 10337 transitions. [2021-11-21 01:45:06,180 INFO L78 Accepts]: Start accepts. Automaton has 7142 states and 10337 transitions. Word has length 279 [2021-11-21 01:45:06,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:06,181 INFO L470 AbstractCegarLoop]: Abstraction has 7142 states and 10337 transitions. [2021-11-21 01:45:06,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-21 01:45:06,182 INFO L276 IsEmpty]: Start isEmpty. Operand 7142 states and 10337 transitions. [2021-11-21 01:45:06,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2021-11-21 01:45:06,197 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:06,197 INFO L514 BasicCegarLoop]: trace histogram [22, 18, 18, 18, 18, 18, 18, 8, 7, 7, 5, 5, 2, 2, 2, 2, 2, 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, 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, 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, 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] [2021-11-21 01:45:06,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-21 01:45:06,198 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:45:06,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:06,199 INFO L85 PathProgramCache]: Analyzing trace with hash 2077590433, now seen corresponding path program 1 times [2021-11-21 01:45:06,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:06,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110964644] [2021-11-21 01:45:06,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:06,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:06,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:06,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1499 trivial. 0 not checked. [2021-11-21 01:45:06,505 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:06,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110964644] [2021-11-21 01:45:06,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110964644] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:45:06,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:45:06,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:45:06,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614340889] [2021-11-21 01:45:06,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:06,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:45:06,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:06,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:45:06,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:45:06,508 INFO L87 Difference]: Start difference. First operand 7142 states and 10337 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-21 01:45:09,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:09,380 INFO L93 Difference]: Finished difference Result 7188 states and 10366 transitions. [2021-11-21 01:45:09,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:45:09,381 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 284 [2021-11-21 01:45:09,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:09,418 INFO L225 Difference]: With dead ends: 7188 [2021-11-21 01:45:09,419 INFO L226 Difference]: Without dead ends: 7186 [2021-11-21 01:45:09,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:45:09,424 INFO L933 BasicCegarLoop]: 1590 mSDtfsCounter, 1722 mSDsluCounter, 3764 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1726 SdHoareTripleChecker+Valid, 4807 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:09,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1726 Valid, 4807 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 836 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-21 01:45:09,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7186 states. [2021-11-21 01:45:09,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7186 to 7186. [2021-11-21 01:45:09,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7186 states, 4622 states have (on average 1.3582864560796193) internal successors, (6278), 4687 states have internal predecessors, (6278), 2045 states have call successors, (2045), 517 states have call predecessors, (2045), 516 states have return successors, (2041), 1994 states have call predecessors, (2041), 2041 states have call successors, (2041) [2021-11-21 01:45:09,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7186 states to 7186 states and 10364 transitions. [2021-11-21 01:45:09,927 INFO L78 Accepts]: Start accepts. Automaton has 7186 states and 10364 transitions. Word has length 284 [2021-11-21 01:45:09,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:09,928 INFO L470 AbstractCegarLoop]: Abstraction has 7186 states and 10364 transitions. [2021-11-21 01:45:09,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-21 01:45:09,929 INFO L276 IsEmpty]: Start isEmpty. Operand 7186 states and 10364 transitions. [2021-11-21 01:45:09,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2021-11-21 01:45:09,940 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:09,941 INFO L514 BasicCegarLoop]: trace histogram [23, 18, 18, 18, 18, 18, 18, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1] [2021-11-21 01:45:09,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-21 01:45:09,941 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:45:09,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:09,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1638815705, now seen corresponding path program 1 times [2021-11-21 01:45:09,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:09,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724022843] [2021-11-21 01:45:09,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:09,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:10,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:10,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1450 trivial. 0 not checked. [2021-11-21 01:45:10,250 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:10,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724022843] [2021-11-21 01:45:10,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724022843] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:45:10,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:45:10,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:45:10,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174939417] [2021-11-21 01:45:10,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:10,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:45:10,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:10,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:45:10,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:45:10,253 INFO L87 Difference]: Start difference. First operand 7186 states and 10364 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2021-11-21 01:45:12,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:12,770 INFO L93 Difference]: Finished difference Result 16390 states and 23671 transitions. [2021-11-21 01:45:12,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:45:12,771 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) Word has length 277 [2021-11-21 01:45:12,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:12,827 INFO L225 Difference]: With dead ends: 16390 [2021-11-21 01:45:12,828 INFO L226 Difference]: Without dead ends: 10092 [2021-11-21 01:45:12,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:45:12,860 INFO L933 BasicCegarLoop]: 2955 mSDtfsCounter, 1618 mSDsluCounter, 1780 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1618 SdHoareTripleChecker+Valid, 4503 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:12,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1618 Valid, 4503 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-21 01:45:12,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10092 states. [2021-11-21 01:45:13,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10092 to 10027. [2021-11-21 01:45:13,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10027 states, 6463 states have (on average 1.3631440507504256) internal successors, (8810), 6562 states have internal predecessors, (8810), 2842 states have call successors, (2842), 720 states have call predecessors, (2842), 719 states have return successors, (2838), 2763 states have call predecessors, (2838), 2838 states have call successors, (2838) [2021-11-21 01:45:13,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10027 states to 10027 states and 14490 transitions. [2021-11-21 01:45:13,640 INFO L78 Accepts]: Start accepts. Automaton has 10027 states and 14490 transitions. Word has length 277 [2021-11-21 01:45:13,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:13,641 INFO L470 AbstractCegarLoop]: Abstraction has 10027 states and 14490 transitions. [2021-11-21 01:45:13,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2021-11-21 01:45:13,641 INFO L276 IsEmpty]: Start isEmpty. Operand 10027 states and 14490 transitions. [2021-11-21 01:45:13,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-11-21 01:45:13,654 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:13,654 INFO L514 BasicCegarLoop]: trace histogram [20, 18, 18, 18, 18, 18, 18, 8, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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] [2021-11-21 01:45:13,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-21 01:45:13,655 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:45:13,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:13,656 INFO L85 PathProgramCache]: Analyzing trace with hash 575121045, now seen corresponding path program 1 times [2021-11-21 01:45:13,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:13,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520060983] [2021-11-21 01:45:13,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:13,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:13,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:14,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1468 trivial. 0 not checked. [2021-11-21 01:45:14,051 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:14,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520060983] [2021-11-21 01:45:14,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520060983] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:45:14,052 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:45:14,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:45:14,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462739155] [2021-11-21 01:45:14,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:14,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:45:14,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:14,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:45:14,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:45:14,054 INFO L87 Difference]: Start difference. First operand 10027 states and 14490 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 3 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (39), 3 states have call predecessors, (39), 3 states have call successors, (39) [2021-11-21 01:45:20,680 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:45:22,075 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:45:23,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:23,515 INFO L93 Difference]: Finished difference Result 31269 states and 45184 transitions. [2021-11-21 01:45:23,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:45:23,515 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 3 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (39), 3 states have call predecessors, (39), 3 states have call successors, (39) Word has length 374 [2021-11-21 01:45:23,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:23,634 INFO L225 Difference]: With dead ends: 31269 [2021-11-21 01:45:23,635 INFO L226 Difference]: Without dead ends: 21279 [2021-11-21 01:45:23,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:45:23,691 INFO L933 BasicCegarLoop]: 3454 mSDtfsCounter, 3317 mSDsluCounter, 4562 mSDsCounter, 0 mSdLazyCounter, 2756 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3406 SdHoareTripleChecker+Valid, 7185 SdHoareTripleChecker+Invalid, 2861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 2756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:23,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3406 Valid, 7185 Invalid, 2861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 2756 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2021-11-21 01:45:23,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21279 states. [2021-11-21 01:45:25,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21279 to 21111. [2021-11-21 01:45:25,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21111 states, 13661 states have (on average 1.3682746504648269) internal successors, (18692), 13895 states have internal predecessors, (18692), 5930 states have call successors, (5930), 1536 states have call predecessors, (5930), 1517 states have return successors, (5926), 5721 states have call predecessors, (5926), 5926 states have call successors, (5926) [2021-11-21 01:45:25,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21111 states to 21111 states and 30548 transitions. [2021-11-21 01:45:25,647 INFO L78 Accepts]: Start accepts. Automaton has 21111 states and 30548 transitions. Word has length 374 [2021-11-21 01:45:25,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:25,647 INFO L470 AbstractCegarLoop]: Abstraction has 21111 states and 30548 transitions. [2021-11-21 01:45:25,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 3 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (39), 3 states have call predecessors, (39), 3 states have call successors, (39) [2021-11-21 01:45:25,648 INFO L276 IsEmpty]: Start isEmpty. Operand 21111 states and 30548 transitions. [2021-11-21 01:45:25,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2021-11-21 01:45:25,660 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:25,661 INFO L514 BasicCegarLoop]: trace histogram [22, 18, 18, 18, 18, 18, 18, 9, 8, 8, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:45:25,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-21 01:45:25,661 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:45:25,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:25,662 INFO L85 PathProgramCache]: Analyzing trace with hash -752765799, now seen corresponding path program 1 times [2021-11-21 01:45:25,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:25,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846868890] [2021-11-21 01:45:25,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:25,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:25,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:26,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1537 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 1521 trivial. 0 not checked. [2021-11-21 01:45:26,225 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:26,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846868890] [2021-11-21 01:45:26,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846868890] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:45:26,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:45:26,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:45:26,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025503412] [2021-11-21 01:45:26,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:26,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:45:26,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:26,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:45:26,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:45:26,229 INFO L87 Difference]: Start difference. First operand 21111 states and 30548 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-21 01:45:29,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:29,370 INFO L93 Difference]: Finished difference Result 21117 states and 30553 transitions. [2021-11-21 01:45:29,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:45:29,371 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 287 [2021-11-21 01:45:29,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:29,495 INFO L225 Difference]: With dead ends: 21117 [2021-11-21 01:45:29,495 INFO L226 Difference]: Without dead ends: 21115 [2021-11-21 01:45:29,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:45:29,510 INFO L933 BasicCegarLoop]: 1590 mSDtfsCounter, 1787 mSDsluCounter, 3699 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1790 SdHoareTripleChecker+Valid, 4751 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:29,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1790 Valid, 4751 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-21 01:45:29,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21115 states. [2021-11-21 01:45:31,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21115 to 21115. [2021-11-21 01:45:31,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21115 states, 13664 states have (on average 1.368193793911007) internal successors, (18695), 13898 states have internal predecessors, (18695), 5930 states have call successors, (5930), 1537 states have call predecessors, (5930), 1518 states have return successors, (5926), 5721 states have call predecessors, (5926), 5926 states have call successors, (5926) [2021-11-21 01:45:31,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21115 states to 21115 states and 30551 transitions. [2021-11-21 01:45:31,437 INFO L78 Accepts]: Start accepts. Automaton has 21115 states and 30551 transitions. Word has length 287 [2021-11-21 01:45:31,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:31,438 INFO L470 AbstractCegarLoop]: Abstraction has 21115 states and 30551 transitions. [2021-11-21 01:45:31,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-21 01:45:31,439 INFO L276 IsEmpty]: Start isEmpty. Operand 21115 states and 30551 transitions. [2021-11-21 01:45:31,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2021-11-21 01:45:31,459 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:31,460 INFO L514 BasicCegarLoop]: trace histogram [22, 18, 18, 18, 18, 18, 18, 10, 9, 9, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:45:31,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-21 01:45:31,461 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:45:31,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:31,461 INFO L85 PathProgramCache]: Analyzing trace with hash -379932982, now seen corresponding path program 1 times [2021-11-21 01:45:31,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:31,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661409958] [2021-11-21 01:45:31,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:31,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:31,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:31,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1571 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 1553 trivial. 0 not checked. [2021-11-21 01:45:31,821 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:31,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661409958] [2021-11-21 01:45:31,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661409958] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:45:31,822 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:45:31,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:45:31,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401117534] [2021-11-21 01:45:31,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:31,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:45:31,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:31,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:45:31,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:45:31,825 INFO L87 Difference]: Start difference. First operand 21115 states and 30551 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-21 01:45:34,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:34,848 INFO L93 Difference]: Finished difference Result 21121 states and 30556 transitions. [2021-11-21 01:45:34,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:45:34,848 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 292 [2021-11-21 01:45:34,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:34,943 INFO L225 Difference]: With dead ends: 21121 [2021-11-21 01:45:34,943 INFO L226 Difference]: Without dead ends: 21119 [2021-11-21 01:45:34,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:45:34,957 INFO L933 BasicCegarLoop]: 1590 mSDtfsCounter, 1787 mSDsluCounter, 3699 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1789 SdHoareTripleChecker+Valid, 4751 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:34,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1789 Valid, 4751 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-21 01:45:34,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21119 states. [2021-11-21 01:45:36,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21119 to 21119. [2021-11-21 01:45:36,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21119 states, 13667 states have (on average 1.3681129728543207) internal successors, (18698), 13901 states have internal predecessors, (18698), 5930 states have call successors, (5930), 1538 states have call predecessors, (5930), 1519 states have return successors, (5926), 5721 states have call predecessors, (5926), 5926 states have call successors, (5926) [2021-11-21 01:45:36,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21119 states to 21119 states and 30554 transitions. [2021-11-21 01:45:36,466 INFO L78 Accepts]: Start accepts. Automaton has 21119 states and 30554 transitions. Word has length 292 [2021-11-21 01:45:36,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:36,467 INFO L470 AbstractCegarLoop]: Abstraction has 21119 states and 30554 transitions. [2021-11-21 01:45:36,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-21 01:45:36,468 INFO L276 IsEmpty]: Start isEmpty. Operand 21119 states and 30554 transitions. [2021-11-21 01:45:36,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2021-11-21 01:45:36,488 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:36,489 INFO L514 BasicCegarLoop]: trace histogram [22, 18, 18, 18, 18, 18, 18, 11, 10, 10, 5, 5, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1] [2021-11-21 01:45:36,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-21 01:45:36,489 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:45:36,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:36,490 INFO L85 PathProgramCache]: Analyzing trace with hash 994195746, now seen corresponding path program 1 times [2021-11-21 01:45:36,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:36,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894424746] [2021-11-21 01:45:36,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:36,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:36,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:36,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1614 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 1594 trivial. 0 not checked. [2021-11-21 01:45:36,790 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:36,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894424746] [2021-11-21 01:45:36,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894424746] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:45:36,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:45:36,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:45:36,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810653569] [2021-11-21 01:45:36,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:36,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:45:36,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:36,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:45:36,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:45:36,793 INFO L87 Difference]: Start difference. First operand 21119 states and 30554 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (41), 3 states have call predecessors, (41), 1 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-21 01:45:39,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:39,680 INFO L93 Difference]: Finished difference Result 21125 states and 30559 transitions. [2021-11-21 01:45:39,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:45:39,680 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (41), 3 states have call predecessors, (41), 1 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) Word has length 298 [2021-11-21 01:45:39,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:39,748 INFO L225 Difference]: With dead ends: 21125 [2021-11-21 01:45:39,748 INFO L226 Difference]: Without dead ends: 21121 [2021-11-21 01:45:39,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:45:39,758 INFO L933 BasicCegarLoop]: 1590 mSDtfsCounter, 1786 mSDsluCounter, 3699 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1787 SdHoareTripleChecker+Valid, 4751 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:39,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1787 Valid, 4751 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-21 01:45:39,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21121 states. [2021-11-21 01:45:41,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21121 to 21121. [2021-11-21 01:45:41,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21121 states, 13669 states have (on average 1.367985953617675) internal successors, (18699), 13902 states have internal predecessors, (18699), 5930 states have call successors, (5930), 1539 states have call predecessors, (5930), 1519 states have return successors, (5926), 5721 states have call predecessors, (5926), 5926 states have call successors, (5926) [2021-11-21 01:45:41,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21121 states to 21121 states and 30555 transitions. [2021-11-21 01:45:41,502 INFO L78 Accepts]: Start accepts. Automaton has 21121 states and 30555 transitions. Word has length 298 [2021-11-21 01:45:41,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:41,503 INFO L470 AbstractCegarLoop]: Abstraction has 21121 states and 30555 transitions. [2021-11-21 01:45:41,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (41), 3 states have call predecessors, (41), 1 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-21 01:45:41,504 INFO L276 IsEmpty]: Start isEmpty. Operand 21121 states and 30555 transitions. [2021-11-21 01:45:41,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-11-21 01:45:41,528 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:41,528 INFO L514 BasicCegarLoop]: trace histogram [22, 18, 18, 18, 18, 18, 18, 12, 11, 11, 5, 5, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1] [2021-11-21 01:45:41,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-21 01:45:41,529 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:45:41,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:41,530 INFO L85 PathProgramCache]: Analyzing trace with hash -915090335, now seen corresponding path program 1 times [2021-11-21 01:45:41,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:41,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128482473] [2021-11-21 01:45:41,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:41,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:41,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:41,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1657 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 1635 trivial. 0 not checked. [2021-11-21 01:45:41,812 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:41,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128482473] [2021-11-21 01:45:41,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128482473] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:45:41,813 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:45:41,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:45:41,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865685796] [2021-11-21 01:45:41,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:41,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:45:41,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:41,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:45:41,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:45:41,815 INFO L87 Difference]: Start difference. First operand 21121 states and 30555 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (42), 3 states have call predecessors, (42), 1 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) [2021-11-21 01:45:44,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:44,946 INFO L93 Difference]: Finished difference Result 21121 states and 30555 transitions. [2021-11-21 01:45:44,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:45:44,947 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (42), 3 states have call predecessors, (42), 1 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) Word has length 304 [2021-11-21 01:45:44,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:45,035 INFO L225 Difference]: With dead ends: 21121 [2021-11-21 01:45:45,036 INFO L226 Difference]: Without dead ends: 20824 [2021-11-21 01:45:45,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:45:45,046 INFO L933 BasicCegarLoop]: 1588 mSDtfsCounter, 1782 mSDsluCounter, 3698 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1782 SdHoareTripleChecker+Valid, 4748 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:45,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1782 Valid, 4748 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-21 01:45:45,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20824 states. [2021-11-21 01:45:46,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20824 to 20824. [2021-11-21 01:45:46,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20824 states, 13591 states have (on average 1.363475829593113) internal successors, (18531), 13734 states have internal predecessors, (18531), 5735 states have call successors, (5735), 1496 states have call predecessors, (5735), 1496 states have return successors, (5735), 5635 states have call predecessors, (5735), 5735 states have call successors, (5735) [2021-11-21 01:45:46,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20824 states to 20824 states and 30001 transitions. [2021-11-21 01:45:46,492 INFO L78 Accepts]: Start accepts. Automaton has 20824 states and 30001 transitions. Word has length 304 [2021-11-21 01:45:46,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:46,493 INFO L470 AbstractCegarLoop]: Abstraction has 20824 states and 30001 transitions. [2021-11-21 01:45:46,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (42), 3 states have call predecessors, (42), 1 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) [2021-11-21 01:45:46,494 INFO L276 IsEmpty]: Start isEmpty. Operand 20824 states and 30001 transitions. [2021-11-21 01:45:46,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2021-11-21 01:45:46,517 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:46,517 INFO L514 BasicCegarLoop]: trace histogram [25, 18, 18, 18, 18, 18, 18, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:45:46,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-21 01:45:46,518 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:45:46,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:46,518 INFO L85 PathProgramCache]: Analyzing trace with hash 377917185, now seen corresponding path program 1 times [2021-11-21 01:45:46,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:46,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816872499] [2021-11-21 01:45:46,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:46,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:46,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:46,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1565 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1551 trivial. 0 not checked. [2021-11-21 01:45:46,758 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:46,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816872499] [2021-11-21 01:45:46,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816872499] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:45:46,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:45:46,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:45:46,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768338653] [2021-11-21 01:45:46,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:46,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:45:46,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:46,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:45:46,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:45:46,762 INFO L87 Difference]: Start difference. First operand 20824 states and 30001 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 3 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-21 01:45:51,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:51,599 INFO L93 Difference]: Finished difference Result 47744 states and 68700 transitions. [2021-11-21 01:45:51,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:45:51,600 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 3 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) Word has length 298 [2021-11-21 01:45:51,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:51,721 INFO L225 Difference]: With dead ends: 47744 [2021-11-21 01:45:51,721 INFO L226 Difference]: Without dead ends: 27000 [2021-11-21 01:45:51,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:45:51,787 INFO L933 BasicCegarLoop]: 2862 mSDtfsCounter, 1515 mSDsluCounter, 8367 mSDsCounter, 0 mSdLazyCounter, 1717 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1515 SdHoareTripleChecker+Valid, 10090 SdHoareTripleChecker+Invalid, 1718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:51,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1515 Valid, 10090 Invalid, 1718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1717 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-21 01:45:51,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27000 states. [2021-11-21 01:45:53,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27000 to 26956. [2021-11-21 01:45:53,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26956 states, 17528 states have (on average 1.357371063441351) internal successors, (23792), 17725 states have internal predecessors, (23792), 7474 states have call successors, (7474), 1942 states have call predecessors, (7474), 1952 states have return successors, (7484), 7344 states have call predecessors, (7484), 7474 states have call successors, (7484) [2021-11-21 01:45:53,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26956 states to 26956 states and 38750 transitions. [2021-11-21 01:45:53,759 INFO L78 Accepts]: Start accepts. Automaton has 26956 states and 38750 transitions. Word has length 298 [2021-11-21 01:45:53,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:53,760 INFO L470 AbstractCegarLoop]: Abstraction has 26956 states and 38750 transitions. [2021-11-21 01:45:53,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 3 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-21 01:45:53,761 INFO L276 IsEmpty]: Start isEmpty. Operand 26956 states and 38750 transitions. [2021-11-21 01:45:53,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2021-11-21 01:45:53,784 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:53,785 INFO L514 BasicCegarLoop]: trace histogram [25, 18, 18, 18, 18, 18, 18, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:45:53,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-21 01:45:53,785 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:45:53,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:53,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1774863207, now seen corresponding path program 1 times [2021-11-21 01:45:53,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:53,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691108542] [2021-11-21 01:45:53,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:53,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:53,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:54,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1565 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1551 trivial. 0 not checked. [2021-11-21 01:45:54,073 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:54,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691108542] [2021-11-21 01:45:54,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691108542] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:45:54,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:45:54,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:45:54,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188305772] [2021-11-21 01:45:54,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:54,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:45:54,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:54,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:45:54,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:45:54,076 INFO L87 Difference]: Start difference. First operand 26956 states and 38750 transitions. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 states have internal predecessors, (90), 3 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-21 01:46:00,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:46:00,731 INFO L93 Difference]: Finished difference Result 60028 states and 86238 transitions. [2021-11-21 01:46:00,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:46:00,731 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 states have internal predecessors, (90), 3 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) Word has length 299 [2021-11-21 01:46:00,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:46:00,849 INFO L225 Difference]: With dead ends: 60028 [2021-11-21 01:46:00,849 INFO L226 Difference]: Without dead ends: 33152 [2021-11-21 01:46:00,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:46:00,912 INFO L933 BasicCegarLoop]: 2867 mSDtfsCounter, 1514 mSDsluCounter, 8375 mSDsCounter, 0 mSdLazyCounter, 1722 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1514 SdHoareTripleChecker+Valid, 10105 SdHoareTripleChecker+Invalid, 1724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:46:00,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1514 Valid, 10105 Invalid, 1724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1722 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-11-21 01:46:00,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33152 states. [2021-11-21 01:46:02,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33152 to 33108. [2021-11-21 01:46:02,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33108 states, 21485 states have (on average 1.3531766348615313) internal successors, (29073), 21736 states have internal predecessors, (29073), 9213 states have call successors, (9213), 2388 states have call predecessors, (9213), 2408 states have return successors, (9233), 9053 states have call predecessors, (9233), 9213 states have call successors, (9233) [2021-11-21 01:46:02,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33108 states to 33108 states and 47519 transitions. [2021-11-21 01:46:02,962 INFO L78 Accepts]: Start accepts. Automaton has 33108 states and 47519 transitions. Word has length 299 [2021-11-21 01:46:02,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:46:02,963 INFO L470 AbstractCegarLoop]: Abstraction has 33108 states and 47519 transitions. [2021-11-21 01:46:02,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 states have internal predecessors, (90), 3 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-21 01:46:02,963 INFO L276 IsEmpty]: Start isEmpty. Operand 33108 states and 47519 transitions. [2021-11-21 01:46:02,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2021-11-21 01:46:02,983 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:46:02,983 INFO L514 BasicCegarLoop]: trace histogram [25, 18, 18, 18, 18, 18, 18, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:46:02,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-21 01:46:02,984 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:46:02,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:46:02,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1291361314, now seen corresponding path program 1 times [2021-11-21 01:46:02,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:46:02,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088528531] [2021-11-21 01:46:02,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:46:02,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:46:03,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:46:03,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1565 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1551 trivial. 0 not checked. [2021-11-21 01:46:03,231 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:46:03,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088528531] [2021-11-21 01:46:03,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088528531] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:46:03,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:46:03,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:46:03,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981790039] [2021-11-21 01:46:03,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:46:03,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:46:03,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:46:03,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:46:03,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:46:03,235 INFO L87 Difference]: Start difference. First operand 33108 states and 47519 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 3 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-21 01:46:10,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:46:10,387 INFO L93 Difference]: Finished difference Result 72617 states and 104132 transitions. [2021-11-21 01:46:10,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:46:10,387 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 3 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) Word has length 300 [2021-11-21 01:46:10,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:46:10,548 INFO L225 Difference]: With dead ends: 72617 [2021-11-21 01:46:10,548 INFO L226 Difference]: Without dead ends: 39589 [2021-11-21 01:46:10,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:46:10,618 INFO L933 BasicCegarLoop]: 2865 mSDtfsCounter, 1526 mSDsluCounter, 8362 mSDsCounter, 0 mSdLazyCounter, 1732 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1526 SdHoareTripleChecker+Valid, 10089 SdHoareTripleChecker+Invalid, 1738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:46:10,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1526 Valid, 10089 Invalid, 1738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1732 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-11-21 01:46:10,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39589 states. [2021-11-21 01:46:12,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39589 to 39545. [2021-11-21 01:46:12,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39545 states, 25614 states have (on average 1.349105957679394) internal successors, (34556), 25919 states have internal predecessors, (34556), 11014 states have call successors, (11014), 2885 states have call predecessors, (11014), 2915 states have return successors, (11044), 10824 states have call predecessors, (11044), 11014 states have call successors, (11044) [2021-11-21 01:46:12,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39545 states to 39545 states and 56614 transitions. [2021-11-21 01:46:12,952 INFO L78 Accepts]: Start accepts. Automaton has 39545 states and 56614 transitions. Word has length 300 [2021-11-21 01:46:12,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:46:12,952 INFO L470 AbstractCegarLoop]: Abstraction has 39545 states and 56614 transitions. [2021-11-21 01:46:12,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 3 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-21 01:46:12,953 INFO L276 IsEmpty]: Start isEmpty. Operand 39545 states and 56614 transitions. [2021-11-21 01:46:12,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2021-11-21 01:46:12,967 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:46:12,968 INFO L514 BasicCegarLoop]: trace histogram [25, 18, 18, 18, 18, 18, 18, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:46:12,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-21 01:46:12,968 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:46:12,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:46:12,969 INFO L85 PathProgramCache]: Analyzing trace with hash -663176271, now seen corresponding path program 1 times [2021-11-21 01:46:12,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:46:12,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964565034] [2021-11-21 01:46:12,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:46:12,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:46:13,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:46:13,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1565 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1551 trivial. 0 not checked. [2021-11-21 01:46:13,494 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:46:13,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964565034] [2021-11-21 01:46:13,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964565034] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:46:13,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:46:13,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:46:13,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104417873] [2021-11-21 01:46:13,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:46:13,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:46:13,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:46:13,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:46:13,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:46:13,498 INFO L87 Difference]: Start difference. First operand 39545 states and 56614 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 3 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-21 01:46:20,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:46:20,044 INFO L93 Difference]: Finished difference Result 85246 states and 122046 transitions. [2021-11-21 01:46:20,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:46:20,047 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 3 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) Word has length 301 [2021-11-21 01:46:20,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:46:20,202 INFO L225 Difference]: With dead ends: 85246 [2021-11-21 01:46:20,202 INFO L226 Difference]: Without dead ends: 45781 [2021-11-21 01:46:20,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:46:20,460 INFO L933 BasicCegarLoop]: 2866 mSDtfsCounter, 1517 mSDsluCounter, 8371 mSDsCounter, 0 mSdLazyCounter, 1733 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1517 SdHoareTripleChecker+Valid, 10100 SdHoareTripleChecker+Invalid, 1740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:46:20,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1517 Valid, 10100 Invalid, 1740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1733 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-11-21 01:46:20,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45781 states. [2021-11-21 01:46:23,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45781 to 45737. [2021-11-21 01:46:23,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45737 states, 29611 states have (on average 1.3466954847860593) internal successors, (39877), 29970 states have internal predecessors, (39877), 12753 states have call successors, (12753), 3331 states have call predecessors, (12753), 3371 states have return successors, (12793), 12533 states have call predecessors, (12793), 12753 states have call successors, (12793) [2021-11-21 01:46:23,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45737 states to 45737 states and 65423 transitions. [2021-11-21 01:46:23,678 INFO L78 Accepts]: Start accepts. Automaton has 45737 states and 65423 transitions. Word has length 301 [2021-11-21 01:46:23,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:46:23,679 INFO L470 AbstractCegarLoop]: Abstraction has 45737 states and 65423 transitions. [2021-11-21 01:46:23,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 3 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-21 01:46:23,679 INFO L276 IsEmpty]: Start isEmpty. Operand 45737 states and 65423 transitions. [2021-11-21 01:46:23,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2021-11-21 01:46:23,702 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:46:23,703 INFO L514 BasicCegarLoop]: trace histogram [25, 18, 18, 18, 18, 18, 18, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:46:23,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-21 01:46:23,704 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:46:23,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:46:23,704 INFO L85 PathProgramCache]: Analyzing trace with hash 41024077, now seen corresponding path program 1 times [2021-11-21 01:46:23,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:46:23,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806807888] [2021-11-21 01:46:23,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:46:23,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:46:23,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:46:23,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1565 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1551 trivial. 0 not checked. [2021-11-21 01:46:23,950 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:46:23,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806807888] [2021-11-21 01:46:23,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806807888] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:46:23,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:46:23,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:46:23,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385566621] [2021-11-21 01:46:23,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:46:23,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:46:23,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:46:23,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:46:23,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:46:23,953 INFO L87 Difference]: Start difference. First operand 45737 states and 65423 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 3 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31)