./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-media-pci-ngene-ngene.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f510e0-e76b-4e8b-bd72-95208ddac26b/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f510e0-e76b-4e8b-bd72-95208ddac26b/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f510e0-e76b-4e8b-bd72-95208ddac26b/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f510e0-e76b-4e8b-bd72-95208ddac26b/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-media-pci-ngene-ngene.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f510e0-e76b-4e8b-bd72-95208ddac26b/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f510e0-e76b-4e8b-bd72-95208ddac26b/bin/utaipan-EQgc7hIp5V --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 df4f0c8d40dc980084ec2f9936d9bc7fc71c78b40a0de276eef2539e9d717dce --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:13:18,351 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:13:18,354 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:13:18,412 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:13:18,413 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:13:18,418 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:13:18,422 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:13:18,427 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:13:18,430 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:13:18,438 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:13:18,440 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:13:18,442 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:13:18,442 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:13:18,445 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:13:18,448 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:13:18,454 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:13:18,457 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:13:18,458 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:13:18,464 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:13:18,469 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:13:18,474 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:13:18,476 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:13:18,479 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:13:18,480 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:13:18,487 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:13:18,488 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:13:18,488 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:13:18,490 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:13:18,491 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:13:18,493 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:13:18,493 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:13:18,494 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:13:18,497 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:13:18,498 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:13:18,500 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:13:18,501 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:13:18,502 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:13:18,502 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:13:18,502 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:13:18,504 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:13:18,504 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:13:18,505 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f510e0-e76b-4e8b-bd72-95208ddac26b/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 02:13:18,545 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:13:18,546 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:13:18,546 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:13:18,547 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:13:18,548 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:13:18,548 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:13:18,548 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:13:18,549 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:13:18,549 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:13:18,549 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:13:18,550 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:13:18,551 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:13:18,551 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:13:18,551 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:13:18,552 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:13:18,552 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:13:18,552 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:13:18,552 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:13:18,553 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:13:18,553 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:13:18,554 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:13:18,554 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:13:18,554 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:13:18,554 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:13:18,555 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:13:18,555 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:13:18,556 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:13:18,557 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:13:18,557 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:13:18,557 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:13:18,558 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:13:18,558 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:13:18,558 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:13:18,559 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:13:18,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:13:18,559 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:13:18,559 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:13:18,560 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:13:18,560 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_43f510e0-e76b-4e8b-bd72-95208ddac26b/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f510e0-e76b-4e8b-bd72-95208ddac26b/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df4f0c8d40dc980084ec2f9936d9bc7fc71c78b40a0de276eef2539e9d717dce [2021-11-23 02:13:18,824 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:13:18,853 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:13:18,857 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:13:18,863 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:13:18,863 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:13:18,865 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f510e0-e76b-4e8b-bd72-95208ddac26b/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-media-pci-ngene-ngene.cil.i [2021-11-23 02:13:18,948 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f510e0-e76b-4e8b-bd72-95208ddac26b/bin/utaipan-EQgc7hIp5V/data/25e8161c7/35c398219254411c8d237c60b0a6a15c/FLAGb3762330c [2021-11-23 02:13:20,007 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:13:20,008 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f510e0-e76b-4e8b-bd72-95208ddac26b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-media-pci-ngene-ngene.cil.i [2021-11-23 02:13:20,073 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f510e0-e76b-4e8b-bd72-95208ddac26b/bin/utaipan-EQgc7hIp5V/data/25e8161c7/35c398219254411c8d237c60b0a6a15c/FLAGb3762330c [2021-11-23 02:13:20,318 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f510e0-e76b-4e8b-bd72-95208ddac26b/bin/utaipan-EQgc7hIp5V/data/25e8161c7/35c398219254411c8d237c60b0a6a15c [2021-11-23 02:13:20,321 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:13:20,323 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:13:20,328 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:13:20,328 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:13:20,333 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:13:20,334 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:13:20" (1/1) ... [2021-11-23 02:13:20,336 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71b3e749 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:13:20, skipping insertion in model container [2021-11-23 02:13:20,336 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:13:20" (1/1) ... [2021-11-23 02:13:20,345 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:13:20,560 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:13:24,664 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_43f510e0-e76b-4e8b-bd72-95208ddac26b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-media-pci-ngene-ngene.cil.i[415958,415971] [2021-11-23 02:13:24,667 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_43f510e0-e76b-4e8b-bd72-95208ddac26b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-media-pci-ngene-ngene.cil.i[416127,416140] [2021-11-23 02:13:24,668 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_43f510e0-e76b-4e8b-bd72-95208ddac26b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-media-pci-ngene-ngene.cil.i[416294,416307] [2021-11-23 02:13:24,668 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_43f510e0-e76b-4e8b-bd72-95208ddac26b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-media-pci-ngene-ngene.cil.i[416462,416475] [2021-11-23 02:13:24,682 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:13:24,739 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:13:25,337 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_43f510e0-e76b-4e8b-bd72-95208ddac26b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-media-pci-ngene-ngene.cil.i[415958,415971] [2021-11-23 02:13:25,338 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_43f510e0-e76b-4e8b-bd72-95208ddac26b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-media-pci-ngene-ngene.cil.i[416127,416140] [2021-11-23 02:13:25,338 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_43f510e0-e76b-4e8b-bd72-95208ddac26b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-media-pci-ngene-ngene.cil.i[416294,416307] [2021-11-23 02:13:25,339 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_43f510e0-e76b-4e8b-bd72-95208ddac26b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-media-pci-ngene-ngene.cil.i[416462,416475] [2021-11-23 02:13:25,345 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:13:25,548 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:13:25,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:13:25 WrapperNode [2021-11-23 02:13:25,549 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:13:25,550 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:13:25,550 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:13:25,551 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:13:25,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:13:25" (1/1) ... [2021-11-23 02:13:25,684 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:13:25" (1/1) ... [2021-11-23 02:13:25,980 INFO L137 Inliner]: procedures = 484, calls = 3172, calls flagged for inlining = 226, calls inlined = 201, statements flattened = 6855 [2021-11-23 02:13:25,982 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:13:25,983 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:13:25,983 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:13:25,984 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:13:25,993 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:13:25" (1/1) ... [2021-11-23 02:13:25,993 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:13:25" (1/1) ... [2021-11-23 02:13:26,065 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:13:25" (1/1) ... [2021-11-23 02:13:26,065 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:13:25" (1/1) ... [2021-11-23 02:13:26,212 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:13:25" (1/1) ... [2021-11-23 02:13:26,241 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:13:25" (1/1) ... [2021-11-23 02:13:26,291 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:13:25" (1/1) ... [2021-11-23 02:13:26,412 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:13:26,418 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:13:26,430 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:13:26,431 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:13:26,435 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:13:25" (1/1) ... [2021-11-23 02:13:26,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:13:26,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f510e0-e76b-4e8b-bd72-95208ddac26b/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:13:26,483 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f510e0-e76b-4e8b-bd72-95208ddac26b/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:13:26,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f510e0-e76b-4e8b-bd72-95208ddac26b/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:13:26,535 INFO L130 BoogieDeclarations]: Found specification of procedure ngene_command_mutex [2021-11-23 02:13:26,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ngene_command_mutex [2021-11-23 02:13:26,536 INFO L130 BoogieDeclarations]: Found specification of procedure ngene_probe [2021-11-23 02:13:26,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ngene_probe [2021-11-23 02:13:26,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-23 02:13:26,536 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-23 02:13:26,536 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 02:13:26,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 02:13:26,538 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2021-11-23 02:13:26,539 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2021-11-23 02:13:26,539 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-23 02:13:26,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-23 02:13:26,539 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_toio [2021-11-23 02:13:26,539 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_toio [2021-11-23 02:13:26,539 INFO L130 BoogieDeclarations]: Found specification of procedure __symbol_put [2021-11-23 02:13:26,539 INFO L138 BoogieDeclarations]: Found implementation of procedure __symbol_put [2021-11-23 02:13:26,540 INFO L130 BoogieDeclarations]: Found specification of procedure dvb_generic_release [2021-11-23 02:13:26,540 INFO L138 BoogieDeclarations]: Found implementation of procedure dvb_generic_release [2021-11-23 02:13:26,540 INFO L130 BoogieDeclarations]: Found specification of procedure dvb_generic_open [2021-11-23 02:13:26,540 INFO L138 BoogieDeclarations]: Found implementation of procedure dvb_generic_open [2021-11-23 02:13:26,540 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-23 02:13:26,540 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-23 02:13:26,541 INFO L130 BoogieDeclarations]: Found specification of procedure ngene_release_buffers [2021-11-23 02:13:26,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ngene_release_buffers [2021-11-23 02:13:26,541 INFO L130 BoogieDeclarations]: Found specification of procedure down [2021-11-23 02:13:26,541 INFO L138 BoogieDeclarations]: Found implementation of procedure down [2021-11-23 02:13:26,542 INFO L130 BoogieDeclarations]: Found specification of procedure pci_get_drvdata [2021-11-23 02:13:26,542 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_get_drvdata [2021-11-23 02:13:26,542 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-23 02:13:26,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-23 02:13:26,542 INFO L130 BoogieDeclarations]: Found specification of procedure tuner_attach_stv6110 [2021-11-23 02:13:26,543 INFO L138 BoogieDeclarations]: Found implementation of procedure tuner_attach_stv6110 [2021-11-23 02:13:26,543 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-23 02:13:26,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-23 02:13:26,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:13:26,543 INFO L130 BoogieDeclarations]: Found specification of procedure tasklet_init [2021-11-23 02:13:26,544 INFO L138 BoogieDeclarations]: Found implementation of procedure tasklet_init [2021-11-23 02:13:26,544 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-11-23 02:13:26,544 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-11-23 02:13:26,545 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2021-11-23 02:13:26,545 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2021-11-23 02:13:26,545 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-23 02:13:26,546 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-23 02:13:26,546 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-23 02:13:26,547 INFO L130 BoogieDeclarations]: Found specification of procedure ngene_command_i2c_read [2021-11-23 02:13:26,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ngene_command_i2c_read [2021-11-23 02:13:26,548 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-23 02:13:26,548 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-23 02:13:26,548 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2021-11-23 02:13:26,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2021-11-23 02:13:26,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-23 02:13:26,549 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-23 02:13:26,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-23 02:13:26,549 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:13:26,550 INFO L130 BoogieDeclarations]: Found specification of procedure dvb_ringbuffer_avail [2021-11-23 02:13:26,550 INFO L138 BoogieDeclarations]: Found implementation of procedure dvb_ringbuffer_avail [2021-11-23 02:13:26,550 INFO L130 BoogieDeclarations]: Found specification of procedure set_transfer [2021-11-23 02:13:26,551 INFO L138 BoogieDeclarations]: Found implementation of procedure set_transfer [2021-11-23 02:13:26,551 INFO L130 BoogieDeclarations]: Found specification of procedure ngene_resume [2021-11-23 02:13:26,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ngene_resume [2021-11-23 02:13:26,551 INFO L130 BoogieDeclarations]: Found specification of procedure dvb_frontend_detach [2021-11-23 02:13:26,551 INFO L138 BoogieDeclarations]: Found implementation of procedure dvb_frontend_detach [2021-11-23 02:13:26,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-23 02:13:26,551 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-23 02:13:26,552 INFO L130 BoogieDeclarations]: Found specification of procedure ngene_shutdown [2021-11-23 02:13:26,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ngene_shutdown [2021-11-23 02:13:26,553 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2021-11-23 02:13:26,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2021-11-23 02:13:26,553 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_cmd_lock_of_ngene [2021-11-23 02:13:26,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_cmd_lock_of_ngene [2021-11-23 02:13:26,554 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2021-11-23 02:13:26,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2021-11-23 02:13:26,554 INFO L130 BoogieDeclarations]: Found specification of procedure memset_io [2021-11-23 02:13:26,554 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_io [2021-11-23 02:13:26,554 INFO L130 BoogieDeclarations]: Found specification of procedure dvb_unregister_frontend [2021-11-23 02:13:26,555 INFO L138 BoogieDeclarations]: Found implementation of procedure dvb_unregister_frontend [2021-11-23 02:13:26,555 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait_event [2021-11-23 02:13:26,556 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait_event [2021-11-23 02:13:26,556 INFO L130 BoogieDeclarations]: Found specification of procedure ngene_command [2021-11-23 02:13:26,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ngene_command [2021-11-23 02:13:26,556 INFO L130 BoogieDeclarations]: Found specification of procedure vfree [2021-11-23 02:13:26,556 INFO L138 BoogieDeclarations]: Found implementation of procedure vfree [2021-11-23 02:13:26,557 INFO L130 BoogieDeclarations]: Found specification of procedure pci_free_consistent [2021-11-23 02:13:26,557 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_free_consistent [2021-11-23 02:13:26,558 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2021-11-23 02:13:26,558 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2021-11-23 02:13:26,558 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-23 02:13:26,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-23 02:13:26,558 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:13:26,558 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_1 [2021-11-23 02:13:26,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_1 [2021-11-23 02:13:26,559 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_0 [2021-11-23 02:13:26,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_0 [2021-11-23 02:13:26,559 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_3 [2021-11-23 02:13:26,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_3 [2021-11-23 02:13:26,559 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_2 [2021-11-23 02:13:26,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_2 [2021-11-23 02:13:26,559 INFO L130 BoogieDeclarations]: Found specification of procedure dvb_ringbuffer_write [2021-11-23 02:13:26,559 INFO L138 BoogieDeclarations]: Found implementation of procedure dvb_ringbuffer_write [2021-11-23 02:13:26,560 INFO L130 BoogieDeclarations]: Found specification of procedure dvb_register_frontend [2021-11-23 02:13:26,560 INFO L138 BoogieDeclarations]: Found implementation of procedure dvb_register_frontend [2021-11-23 02:13:26,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:13:26,560 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-23 02:13:26,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-23 02:13:26,560 INFO L130 BoogieDeclarations]: Found specification of procedure ngene_remove [2021-11-23 02:13:26,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ngene_remove [2021-11-23 02:13:26,560 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_state_lock_of_ngene_channel [2021-11-23 02:13:26,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_state_lock_of_ngene_channel [2021-11-23 02:13:26,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:13:26,561 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2021-11-23 02:13:26,561 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2021-11-23 02:13:26,561 INFO L130 BoogieDeclarations]: Found specification of procedure ngene_stop [2021-11-23 02:13:26,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ngene_stop [2021-11-23 02:13:26,561 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-23 02:13:26,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-23 02:13:26,571 INFO L130 BoogieDeclarations]: Found specification of procedure tasklet_schedule [2021-11-23 02:13:26,571 INFO L138 BoogieDeclarations]: Found implementation of procedure tasklet_schedule [2021-11-23 02:13:26,571 INFO L130 BoogieDeclarations]: Found specification of procedure ngene_i2c_init [2021-11-23 02:13:26,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ngene_i2c_init [2021-11-23 02:13:26,572 INFO L130 BoogieDeclarations]: Found specification of procedure sema_init [2021-11-23 02:13:26,572 INFO L138 BoogieDeclarations]: Found implementation of procedure sema_init [2021-11-23 02:13:26,572 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-11-23 02:13:26,572 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-11-23 02:13:26,572 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_del_adapter [2021-11-23 02:13:26,572 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_del_adapter [2021-11-23 02:13:26,573 INFO L130 BoogieDeclarations]: Found specification of procedure dvb_ringbuffer_free [2021-11-23 02:13:26,573 INFO L138 BoogieDeclarations]: Found implementation of procedure dvb_ringbuffer_free [2021-11-23 02:13:26,573 INFO L130 BoogieDeclarations]: Found specification of procedure writel [2021-11-23 02:13:26,573 INFO L138 BoogieDeclarations]: Found implementation of procedure writel [2021-11-23 02:13:26,573 INFO L130 BoogieDeclarations]: Found specification of procedure init_channels [2021-11-23 02:13:26,573 INFO L138 BoogieDeclarations]: Found implementation of procedure init_channels [2021-11-23 02:13:26,574 INFO L130 BoogieDeclarations]: Found specification of procedure free_ringbuffer [2021-11-23 02:13:26,575 INFO L138 BoogieDeclarations]: Found implementation of procedure free_ringbuffer [2021-11-23 02:13:26,576 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2021-11-23 02:13:26,576 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2021-11-23 02:13:26,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:13:26,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:13:26,576 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dvb_register_frontend [2021-11-23 02:13:26,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dvb_register_frontend [2021-11-23 02:13:26,577 INFO L130 BoogieDeclarations]: Found specification of procedure AllocateRingBuffers [2021-11-23 02:13:26,577 INFO L138 BoogieDeclarations]: Found implementation of procedure AllocateRingBuffers [2021-11-23 02:13:26,577 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2021-11-23 02:13:26,577 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2021-11-23 02:13:26,577 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-23 02:13:26,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 02:13:26,577 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-23 02:13:26,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-23 02:13:26,578 INFO L130 BoogieDeclarations]: Found specification of procedure dvb_ringbuffer_init [2021-11-23 02:13:26,578 INFO L138 BoogieDeclarations]: Found implementation of procedure dvb_ringbuffer_init [2021-11-23 02:13:26,578 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_fromio [2021-11-23 02:13:26,578 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_fromio [2021-11-23 02:13:26,578 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-23 02:13:26,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-23 02:13:26,579 INFO L130 BoogieDeclarations]: Found specification of procedure request_irq [2021-11-23 02:13:26,579 INFO L138 BoogieDeclarations]: Found implementation of procedure request_irq [2021-11-23 02:13:26,579 INFO L130 BoogieDeclarations]: Found specification of procedure demod_attach_stv0900 [2021-11-23 02:13:26,579 INFO L138 BoogieDeclarations]: Found implementation of procedure demod_attach_stv0900 [2021-11-23 02:13:26,579 INFO L130 BoogieDeclarations]: Found specification of procedure FillTSBuffer [2021-11-23 02:13:26,579 INFO L138 BoogieDeclarations]: Found implementation of procedure FillTSBuffer [2021-11-23 02:13:26,579 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_cmd_lock_of_ngene [2021-11-23 02:13:26,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_cmd_lock_of_ngene [2021-11-23 02:13:26,580 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_EMGentry_exit_module_exit_ngene_12_2 [2021-11-23 02:13:26,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_EMGentry_exit_module_exit_ngene_12_2 [2021-11-23 02:13:26,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-23 02:13:26,580 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-23 02:13:26,580 INFO L130 BoogieDeclarations]: Found specification of procedure create_ring_buffer [2021-11-23 02:13:26,580 INFO L138 BoogieDeclarations]: Found implementation of procedure create_ring_buffer [2021-11-23 02:13:26,581 INFO L130 BoogieDeclarations]: Found specification of procedure pci_alloc_consistent [2021-11-23 02:13:26,581 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_alloc_consistent [2021-11-23 02:13:26,581 INFO L130 BoogieDeclarations]: Found specification of procedure tasklet_kill [2021-11-23 02:13:26,581 INFO L138 BoogieDeclarations]: Found implementation of procedure tasklet_kill [2021-11-23 02:13:26,581 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_get_drvdata [2021-11-23 02:13:26,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_get_drvdata [2021-11-23 02:13:26,581 INFO L130 BoogieDeclarations]: Found specification of procedure ngene_command_gpio_set [2021-11-23 02:13:26,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ngene_command_gpio_set [2021-11-23 02:13:26,582 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:13:26,582 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_read_eeprom [2021-11-23 02:13:26,582 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_read_eeprom [2021-11-23 02:13:26,582 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-23 02:13:26,584 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-23 02:13:26,584 INFO L130 BoogieDeclarations]: Found specification of procedure up [2021-11-23 02:13:26,584 INFO L138 BoogieDeclarations]: Found implementation of procedure up [2021-11-23 02:13:26,585 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:13:26,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 02:13:26,585 INFO L130 BoogieDeclarations]: Found specification of procedure my_dvb_dmxdev_ts_card_init [2021-11-23 02:13:26,585 INFO L138 BoogieDeclarations]: Found implementation of procedure my_dvb_dmxdev_ts_card_init [2021-11-23 02:13:26,585 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~structbegin~int~structend~~TO~int [2021-11-23 02:13:26,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~structbegin~int~structend~~TO~int [2021-11-23 02:13:26,586 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_request_irq [2021-11-23 02:13:26,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_request_irq [2021-11-23 02:13:26,586 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-23 02:13:26,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-23 02:13:26,586 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_irq [2021-11-23 02:13:26,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_irq [2021-11-23 02:13:26,586 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_state_lock_of_ngene_channel [2021-11-23 02:13:26,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_state_lock_of_ngene_channel [2021-11-23 02:13:26,587 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_irq_66 [2021-11-23 02:13:26,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_irq_66 [2021-11-23 02:13:26,587 INFO L130 BoogieDeclarations]: Found specification of procedure init_channel [2021-11-23 02:13:26,587 INFO L138 BoogieDeclarations]: Found implementation of procedure init_channel [2021-11-23 02:13:26,587 INFO L130 BoogieDeclarations]: Found specification of procedure release_channel [2021-11-23 02:13:26,587 INFO L138 BoogieDeclarations]: Found implementation of procedure release_channel [2021-11-23 02:13:26,587 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~$Pointer$ [2021-11-23 02:13:26,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~$Pointer$ [2021-11-23 02:13:26,588 INFO L130 BoogieDeclarations]: Found specification of procedure dvb_ringbuffer_flush [2021-11-23 02:13:26,588 INFO L138 BoogieDeclarations]: Found implementation of procedure dvb_ringbuffer_flush [2021-11-23 02:13:26,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:13:26,588 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_transfer [2021-11-23 02:13:26,588 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_transfer [2021-11-23 02:13:26,588 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2021-11-23 02:13:26,589 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2021-11-23 02:13:26,589 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-23 02:13:26,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-23 02:13:26,589 INFO L130 BoogieDeclarations]: Found specification of procedure vmalloc [2021-11-23 02:13:26,589 INFO L138 BoogieDeclarations]: Found implementation of procedure vmalloc [2021-11-23 02:13:26,590 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irq_67 [2021-11-23 02:13:26,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irq_67 [2021-11-23 02:13:26,590 INFO L130 BoogieDeclarations]: Found specification of procedure __symbol_get [2021-11-23 02:13:26,590 INFO L138 BoogieDeclarations]: Found implementation of procedure __symbol_get [2021-11-23 02:13:26,590 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-11-23 02:13:26,590 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-11-23 02:13:26,591 INFO L130 BoogieDeclarations]: Found specification of procedure drxk_gate_ctrl [2021-11-23 02:13:26,591 INFO L138 BoogieDeclarations]: Found implementation of procedure drxk_gate_ctrl [2021-11-23 02:13:26,591 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-23 02:13:26,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-23 02:13:26,591 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-11-23 02:13:26,591 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-11-23 02:13:26,591 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-23 02:13:26,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-23 02:13:26,592 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_msi [2021-11-23 02:13:26,592 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_msi [2021-11-23 02:13:26,592 INFO L130 BoogieDeclarations]: Found specification of procedure readl [2021-11-23 02:13:26,592 INFO L138 BoogieDeclarations]: Found implementation of procedure readl [2021-11-23 02:13:26,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:13:26,595 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dvb_unregister_frontend [2021-11-23 02:13:26,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dvb_unregister_frontend [2021-11-23 02:13:26,595 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-23 02:13:26,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-23 02:13:27,670 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:13:27,674 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:13:30,409 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-23 02:13:38,517 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-23 02:13:38,587 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:13:39,935 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:13:39,935 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 02:13:39,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:13:39 BoogieIcfgContainer [2021-11-23 02:13:39,942 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:13:39,944 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:13:39,944 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:13:39,948 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:13:39,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:13:20" (1/3) ... [2021-11-23 02:13:39,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@748d58cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:13:39, skipping insertion in model container [2021-11-23 02:13:39,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:13:25" (2/3) ... [2021-11-23 02:13:39,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@748d58cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:13:39, skipping insertion in model container [2021-11-23 02:13:39,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:13:39" (3/3) ... [2021-11-23 02:13:39,951 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-media-pci-ngene-ngene.cil.i [2021-11-23 02:13:39,957 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:13:39,957 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-23 02:13:40,014 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:13:40,021 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 [2021-11-23 02:13:40,022 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-23 02:13:40,079 INFO L276 IsEmpty]: Start isEmpty. Operand has 1577 states, 971 states have (on average 1.3429454170957775) internal successors, (1304), 993 states have internal predecessors, (1304), 493 states have call successors, (493), 111 states have call predecessors, (493), 110 states have return successors, (485), 485 states have call predecessors, (485), 485 states have call successors, (485) [2021-11-23 02:13:40,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-23 02:13:40,099 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:13:40,100 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:13:40,101 INFO L402 AbstractCegarLoop]: === Iteration 1 === 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)] === [2021-11-23 02:13:40,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:13:40,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1364954074, now seen corresponding path program 1 times [2021-11-23 02:13:40,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:13:40,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632508979] [2021-11-23 02:13:40,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:13:40,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:13:40,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:13:41,137 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-11-23 02:13:41,138 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:13:41,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632508979] [2021-11-23 02:13:41,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632508979] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:13:41,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:13:41,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:13:41,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671225039] [2021-11-23 02:13:41,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:13:41,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:13:41,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:13:41,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:13:41,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:13:41,189 INFO L87 Difference]: Start difference. First operand has 1577 states, 971 states have (on average 1.3429454170957775) internal successors, (1304), 993 states have internal predecessors, (1304), 493 states have call successors, (493), 111 states have call predecessors, (493), 110 states have return successors, (485), 485 states have call predecessors, (485), 485 states have call successors, (485) Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-23 02:13:44,505 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:13:47,362 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:13:48,574 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:13:50,066 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:13:52,955 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:13:55,355 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:13:55,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:13:55,550 INFO L93 Difference]: Finished difference Result 4513 states and 6736 transitions. [2021-11-23 02:13:55,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:13:55,553 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 141 [2021-11-23 02:13:55,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:13:55,601 INFO L225 Difference]: With dead ends: 4513 [2021-11-23 02:13:55,602 INFO L226 Difference]: Without dead ends: 2934 [2021-11-23 02:13:55,620 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 [2021-11-23 02:13:55,624 INFO L933 BasicCegarLoop]: 2442 mSDtfsCounter, 2074 mSDsluCounter, 2230 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 6 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2083 SdHoareTripleChecker+Valid, 4399 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:13:55,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2083 Valid, 4399 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 570 Invalid, 4 Unknown, 0 Unchecked, 14.0s Time] [2021-11-23 02:13:55,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2934 states. [2021-11-23 02:13:56,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2934 to 2904. [2021-11-23 02:13:56,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2904 states, 1810 states have (on average 1.3408839779005526) internal successors, (2427), 1859 states have internal predecessors, (2427), 887 states have call successors, (887), 208 states have call predecessors, (887), 204 states have return successors, (916), 873 states have call predecessors, (916), 883 states have call successors, (916) [2021-11-23 02:13:56,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2904 states to 2904 states and 4230 transitions. [2021-11-23 02:13:56,094 INFO L78 Accepts]: Start accepts. Automaton has 2904 states and 4230 transitions. Word has length 141 [2021-11-23 02:13:56,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:13:56,098 INFO L470 AbstractCegarLoop]: Abstraction has 2904 states and 4230 transitions. [2021-11-23 02:13:56,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-23 02:13:56,100 INFO L276 IsEmpty]: Start isEmpty. Operand 2904 states and 4230 transitions. [2021-11-23 02:13:56,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-23 02:13:56,122 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:13:56,123 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 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] [2021-11-23 02:13:56,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:13:56,124 INFO L402 AbstractCegarLoop]: === Iteration 2 === 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)] === [2021-11-23 02:13:56,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:13:56,128 INFO L85 PathProgramCache]: Analyzing trace with hash -2027454988, now seen corresponding path program 1 times [2021-11-23 02:13:56,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:13:56,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458502781] [2021-11-23 02:13:56,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:13:56,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:13:56,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:13:56,613 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2021-11-23 02:13:56,613 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:13:56,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458502781] [2021-11-23 02:13:56,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458502781] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:13:56,615 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:13:56,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:13:56,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689390444] [2021-11-23 02:13:56,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:13:56,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:13:56,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:13:56,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:13:56,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:13:56,620 INFO L87 Difference]: Start difference. First operand 2904 states and 4230 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-23 02:14:00,387 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:14:05,224 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:14:07,285 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:14:09,755 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:14:09,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:14:09,892 INFO L93 Difference]: Finished difference Result 8498 states and 12380 transitions. [2021-11-23 02:14:09,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:14:09,894 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 145 [2021-11-23 02:14:09,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:14:09,956 INFO L225 Difference]: With dead ends: 8498 [2021-11-23 02:14:09,957 INFO L226 Difference]: Without dead ends: 5619 [2021-11-23 02:14:09,979 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 [2021-11-23 02:14:09,982 INFO L933 BasicCegarLoop]: 2356 mSDtfsCounter, 2004 mSDsluCounter, 2163 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 11 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2015 SdHoareTripleChecker+Valid, 4252 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:14:09,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2015 Valid, 4252 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 593 Invalid, 4 Unknown, 0 Unchecked, 12.9s Time] [2021-11-23 02:14:09,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5619 states. [2021-11-23 02:14:10,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5619 to 5614. [2021-11-23 02:14:10,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5614 states, 3527 states have (on average 1.3396654380493338) internal successors, (4725), 3617 states have internal predecessors, (4725), 1681 states have call successors, (1681), 410 states have call predecessors, (1681), 403 states have return successors, (1756), 1660 states have call predecessors, (1756), 1677 states have call successors, (1756) [2021-11-23 02:14:10,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5614 states to 5614 states and 8162 transitions. [2021-11-23 02:14:10,347 INFO L78 Accepts]: Start accepts. Automaton has 5614 states and 8162 transitions. Word has length 145 [2021-11-23 02:14:10,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:14:10,351 INFO L470 AbstractCegarLoop]: Abstraction has 5614 states and 8162 transitions. [2021-11-23 02:14:10,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-23 02:14:10,352 INFO L276 IsEmpty]: Start isEmpty. Operand 5614 states and 8162 transitions. [2021-11-23 02:14:10,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-23 02:14:10,359 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:14:10,363 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:14:10,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:14:10,364 INFO L402 AbstractCegarLoop]: === Iteration 3 === 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)] === [2021-11-23 02:14:10,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:14:10,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1363322872, now seen corresponding path program 1 times [2021-11-23 02:14:10,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:14:10,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592654719] [2021-11-23 02:14:10,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:10,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:14:10,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:10,811 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-11-23 02:14:10,812 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:14:10,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592654719] [2021-11-23 02:14:10,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592654719] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:14:10,812 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:14:10,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:14:10,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020435944] [2021-11-23 02:14:10,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:14:10,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:14:10,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:14:10,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:14:10,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:14:10,815 INFO L87 Difference]: Start difference. First operand 5614 states and 8162 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-23 02:14:13,813 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:14:15,836 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:14:18,453 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:14:21,612 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:14:23,642 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:14:25,605 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:14:26,742 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:14:26,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:14:26,787 INFO L93 Difference]: Finished difference Result 10133 states and 14700 transitions. [2021-11-23 02:14:26,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:14:26,788 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 160 [2021-11-23 02:14:26,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:14:26,829 INFO L225 Difference]: With dead ends: 10133 [2021-11-23 02:14:26,829 INFO L226 Difference]: Without dead ends: 4544 [2021-11-23 02:14:26,860 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 [2021-11-23 02:14:26,861 INFO L933 BasicCegarLoop]: 2168 mSDtfsCounter, 855 mSDsluCounter, 2162 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 18 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 855 SdHoareTripleChecker+Valid, 4064 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:14:26,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [855 Valid, 4064 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 630 Invalid, 4 Unknown, 0 Unchecked, 15.7s Time] [2021-11-23 02:14:26,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4544 states. [2021-11-23 02:14:27,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4544 to 4515. [2021-11-23 02:14:27,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4515 states, 2835 states have (on average 1.3343915343915345) internal successors, (3783), 2898 states have internal predecessors, (3783), 1338 states have call successors, (1338), 345 states have call predecessors, (1338), 339 states have return successors, (1367), 1314 states have call predecessors, (1367), 1334 states have call successors, (1367) [2021-11-23 02:14:27,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4515 states to 4515 states and 6488 transitions. [2021-11-23 02:14:27,102 INFO L78 Accepts]: Start accepts. Automaton has 4515 states and 6488 transitions. Word has length 160 [2021-11-23 02:14:27,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:14:27,103 INFO L470 AbstractCegarLoop]: Abstraction has 4515 states and 6488 transitions. [2021-11-23 02:14:27,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-23 02:14:27,104 INFO L276 IsEmpty]: Start isEmpty. Operand 4515 states and 6488 transitions. [2021-11-23 02:14:27,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-23 02:14:27,108 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:14:27,109 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 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] [2021-11-23 02:14:27,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:14:27,109 INFO L402 AbstractCegarLoop]: === Iteration 4 === 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)] === [2021-11-23 02:14:27,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:14:27,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1535129765, now seen corresponding path program 1 times [2021-11-23 02:14:27,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:14:27,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773325612] [2021-11-23 02:14:27,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:27,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:14:27,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:27,422 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 554 trivial. 0 not checked. [2021-11-23 02:14:27,422 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:14:27,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773325612] [2021-11-23 02:14:27,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773325612] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:14:27,423 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:14:27,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:14:27,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344433169] [2021-11-23 02:14:27,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:14:27,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:14:27,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:14:27,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:14:27,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:14:27,425 INFO L87 Difference]: Start difference. First operand 4515 states and 6488 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-23 02:14:30,258 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:14:32,506 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:14:36,274 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:14:38,326 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:14:41,829 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:14:41,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:14:41,905 INFO L93 Difference]: Finished difference Result 12303 states and 17733 transitions. [2021-11-23 02:14:41,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:14:41,905 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 173 [2021-11-23 02:14:41,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:14:41,976 INFO L225 Difference]: With dead ends: 12303 [2021-11-23 02:14:41,976 INFO L226 Difference]: Without dead ends: 7813 [2021-11-23 02:14:42,000 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 [2021-11-23 02:14:42,002 INFO L933 BasicCegarLoop]: 2408 mSDtfsCounter, 1971 mSDsluCounter, 2199 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 7 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1984 SdHoareTripleChecker+Valid, 4333 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:14:42,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1984 Valid, 4333 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 587 Invalid, 5 Unknown, 0 Unchecked, 14.1s Time] [2021-11-23 02:14:42,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7813 states. [2021-11-23 02:14:42,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7813 to 7775. [2021-11-23 02:14:42,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7775 states, 4889 states have (on average 1.3372877889138883) internal successors, (6538), 5017 states have internal predecessors, (6538), 2298 states have call successors, (2298), 598 states have call predecessors, (2298), 585 states have return successors, (2373), 2241 states have call predecessors, (2373), 2294 states have call successors, (2373) [2021-11-23 02:14:42,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7775 states to 7775 states and 11209 transitions. [2021-11-23 02:14:42,459 INFO L78 Accepts]: Start accepts. Automaton has 7775 states and 11209 transitions. Word has length 173 [2021-11-23 02:14:42,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:14:42,460 INFO L470 AbstractCegarLoop]: Abstraction has 7775 states and 11209 transitions. [2021-11-23 02:14:42,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-23 02:14:42,460 INFO L276 IsEmpty]: Start isEmpty. Operand 7775 states and 11209 transitions. [2021-11-23 02:14:42,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-23 02:14:42,465 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:14:42,466 INFO L514 BasicCegarLoop]: trace histogram [16, 12, 12, 12, 12, 12, 12, 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] [2021-11-23 02:14:42,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:14:42,466 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)] === [2021-11-23 02:14:42,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:14:42,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1582077265, now seen corresponding path program 1 times [2021-11-23 02:14:42,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:14:42,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286726704] [2021-11-23 02:14:42,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:42,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:14:42,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:42,924 INFO L134 CoverageAnalysis]: Checked inductivity of 671 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 671 trivial. 0 not checked. [2021-11-23 02:14:42,924 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:14:42,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286726704] [2021-11-23 02:14:42,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286726704] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:14:42,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:14:42,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:14:42,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459835057] [2021-11-23 02:14:42,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:14:42,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:14:42,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:14:42,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:14:42,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:14:42,928 INFO L87 Difference]: Start difference. First operand 7775 states and 11209 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-23 02:14:48,053 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:14:51,713 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:14:55,175 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:14:57,258 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:15:02,973 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:15:04,995 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:15:05,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:15:05,297 INFO L93 Difference]: Finished difference Result 9542 states and 13713 transitions. [2021-11-23 02:15:05,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:15:05,297 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 191 [2021-11-23 02:15:05,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:15:05,386 INFO L225 Difference]: With dead ends: 9542 [2021-11-23 02:15:05,387 INFO L226 Difference]: Without dead ends: 9540 [2021-11-23 02:15:05,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:15:05,396 INFO L933 BasicCegarLoop]: 2204 mSDtfsCounter, 2074 mSDsluCounter, 6278 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 1 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2098 SdHoareTripleChecker+Valid, 7755 SdHoareTripleChecker+Invalid, 1036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:15:05,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2098 Valid, 7755 Invalid, 1036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1029 Invalid, 6 Unknown, 0 Unchecked, 21.9s Time] [2021-11-23 02:15:05,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9540 states. [2021-11-23 02:15:05,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9540 to 9535. [2021-11-23 02:15:05,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9535 states, 5981 states have (on average 1.3323858886473834) internal successors, (7969), 6143 states have internal predecessors, (7969), 2811 states have call successors, (2811), 755 states have call predecessors, (2811), 740 states have return successors, (2928), 2749 states have call predecessors, (2928), 2807 states have call successors, (2928) [2021-11-23 02:15:05,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9535 states to 9535 states and 13708 transitions. [2021-11-23 02:15:05,921 INFO L78 Accepts]: Start accepts. Automaton has 9535 states and 13708 transitions. Word has length 191 [2021-11-23 02:15:05,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:15:05,923 INFO L470 AbstractCegarLoop]: Abstraction has 9535 states and 13708 transitions. [2021-11-23 02:15:05,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-23 02:15:05,924 INFO L276 IsEmpty]: Start isEmpty. Operand 9535 states and 13708 transitions. [2021-11-23 02:15:05,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-23 02:15:05,931 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:15:05,931 INFO L514 BasicCegarLoop]: trace histogram [16, 12, 12, 12, 12, 12, 12, 4, 4, 2, 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] [2021-11-23 02:15:05,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:15:05,932 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)] === [2021-11-23 02:15:05,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:15:05,933 INFO L85 PathProgramCache]: Analyzing trace with hash 625853575, now seen corresponding path program 1 times [2021-11-23 02:15:05,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:15:05,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525818964] [2021-11-23 02:15:05,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:15:05,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:15:06,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:15:06,444 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 667 trivial. 0 not checked. [2021-11-23 02:15:06,445 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:15:06,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525818964] [2021-11-23 02:15:06,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525818964] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:15:06,445 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:15:06,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:15:06,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141467603] [2021-11-23 02:15:06,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:15:06,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:15:06,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:15:06,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:15:06,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:15:06,448 INFO L87 Difference]: Start difference. First operand 9535 states and 13708 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-23 02:15:10,786 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:15:13,780 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:15:16,151 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:15:17,315 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:15:19,340 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:15:21,403 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:15:23,864 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:15:27,528 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:15:29,232 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:15:29,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:15:29,419 INFO L93 Difference]: Finished difference Result 18699 states and 26888 transitions. [2021-11-23 02:15:29,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:15:29,420 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 196 [2021-11-23 02:15:29,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:15:29,604 INFO L225 Difference]: With dead ends: 18699 [2021-11-23 02:15:29,604 INFO L226 Difference]: Without dead ends: 18697 [2021-11-23 02:15:29,611 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 [2021-11-23 02:15:29,616 INFO L933 BasicCegarLoop]: 2405 mSDtfsCounter, 2074 mSDsluCounter, 7542 mSDsCounter, 0 mSdLazyCounter, 1156 mSolverCounterSat, 2 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2095 SdHoareTripleChecker+Valid, 9096 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1156 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:15:29,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2095 Valid, 9096 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1156 Invalid, 5 Unknown, 0 Unchecked, 22.5s Time] [2021-11-23 02:15:29,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18697 states. [2021-11-23 02:15:30,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18697 to 18690. [2021-11-23 02:15:30,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18690 states, 11711 states have (on average 1.3328494577747416) internal successors, (15609), 12031 states have internal predecessors, (15609), 5517 states have call successors, (5517), 1489 states have call predecessors, (5517), 1459 states have return successors, (5756), 5393 states have call predecessors, (5756), 5509 states have call successors, (5756) [2021-11-23 02:15:30,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18690 states to 18690 states and 26882 transitions. [2021-11-23 02:15:30,568 INFO L78 Accepts]: Start accepts. Automaton has 18690 states and 26882 transitions. Word has length 196 [2021-11-23 02:15:30,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:15:30,571 INFO L470 AbstractCegarLoop]: Abstraction has 18690 states and 26882 transitions. [2021-11-23 02:15:30,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-23 02:15:30,571 INFO L276 IsEmpty]: Start isEmpty. Operand 18690 states and 26882 transitions. [2021-11-23 02:15:30,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-23 02:15:30,577 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:15:30,578 INFO L514 BasicCegarLoop]: trace histogram [16, 12, 12, 12, 12, 12, 12, 4, 4, 3, 2, 2, 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] [2021-11-23 02:15:30,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 02:15:30,578 INFO L402 AbstractCegarLoop]: === Iteration 7 === 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)] === [2021-11-23 02:15:30,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:15:30,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1934252918, now seen corresponding path program 1 times [2021-11-23 02:15:30,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:15:30,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163494054] [2021-11-23 02:15:30,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:15:30,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:15:30,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:15:30,982 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 671 trivial. 0 not checked. [2021-11-23 02:15:30,983 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:15:30,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163494054] [2021-11-23 02:15:30,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163494054] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:15:30,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:15:30,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:15:30,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101075026] [2021-11-23 02:15:30,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:15:30,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:15:30,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:15:30,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:15:30,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:15:30,985 INFO L87 Difference]: Start difference. First operand 18690 states and 26882 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-23 02:15:34,542 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:15:36,625 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:15:39,019 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:15:42,100 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:15:44,184 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:15:48,000 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:15:50,732 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:15:51,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:15:51,069 INFO L93 Difference]: Finished difference Result 18705 states and 26894 transitions. [2021-11-23 02:15:51,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:15:51,070 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 201 [2021-11-23 02:15:51,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:15:51,162 INFO L225 Difference]: With dead ends: 18705 [2021-11-23 02:15:51,163 INFO L226 Difference]: Without dead ends: 18703 [2021-11-23 02:15:51,175 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 [2021-11-23 02:15:51,176 INFO L933 BasicCegarLoop]: 2210 mSDtfsCounter, 2070 mSDsluCounter, 6283 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2092 SdHoareTripleChecker+Valid, 7767 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:15:51,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2092 Valid, 7767 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1030 Invalid, 4 Unknown, 0 Unchecked, 19.7s Time] [2021-11-23 02:15:51,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18703 states. [2021-11-23 02:15:52,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18703 to 18698. [2021-11-23 02:15:52,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18698 states, 11717 states have (on average 1.3326790133993343) internal successors, (15615), 12037 states have internal predecessors, (15615), 5517 states have call successors, (5517), 1491 states have call predecessors, (5517), 1461 states have return successors, (5756), 5393 states have call predecessors, (5756), 5509 states have call successors, (5756) [2021-11-23 02:15:52,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18698 states to 18698 states and 26888 transitions. [2021-11-23 02:15:52,288 INFO L78 Accepts]: Start accepts. Automaton has 18698 states and 26888 transitions. Word has length 201 [2021-11-23 02:15:52,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:15:52,289 INFO L470 AbstractCegarLoop]: Abstraction has 18698 states and 26888 transitions. [2021-11-23 02:15:52,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-23 02:15:52,290 INFO L276 IsEmpty]: Start isEmpty. Operand 18698 states and 26888 transitions. [2021-11-23 02:15:52,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-11-23 02:15:52,297 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:15:52,298 INFO L514 BasicCegarLoop]: trace histogram [16, 12, 12, 12, 12, 12, 12, 5, 5, 4, 3, 3, 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] [2021-11-23 02:15:52,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 02:15:52,298 INFO L402 AbstractCegarLoop]: === Iteration 8 === 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)] === [2021-11-23 02:15:52,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:15:52,300 INFO L85 PathProgramCache]: Analyzing trace with hash -3001155, now seen corresponding path program 1 times [2021-11-23 02:15:52,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:15:52,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075788619] [2021-11-23 02:15:52,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:15:52,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:15:52,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:15:52,690 INFO L134 CoverageAnalysis]: Checked inductivity of 688 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 682 trivial. 0 not checked. [2021-11-23 02:15:52,690 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:15:52,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075788619] [2021-11-23 02:15:52,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075788619] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:15:52,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:15:52,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:15:52,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216192954] [2021-11-23 02:15:52,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:15:52,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:15:52,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:15:52,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:15:52,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:15:52,693 INFO L87 Difference]: Start difference. First operand 18698 states and 26888 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-23 02:15:57,796 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:16:00,455 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:16:01,736 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:16:03,765 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:16:05,840 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:16:08,631 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:16:10,657 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:16:11,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:16:11,038 INFO L93 Difference]: Finished difference Result 18970 states and 27135 transitions. [2021-11-23 02:16:11,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:16:11,039 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 205 [2021-11-23 02:16:11,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:16:11,162 INFO L225 Difference]: With dead ends: 18970 [2021-11-23 02:16:11,162 INFO L226 Difference]: Without dead ends: 18968 [2021-11-23 02:16:11,171 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 [2021-11-23 02:16:11,172 INFO L933 BasicCegarLoop]: 1978 mSDtfsCounter, 2065 mSDsluCounter, 4709 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 2 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2079 SdHoareTripleChecker+Valid, 6097 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:16:11,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2079 Valid, 6097 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 896 Invalid, 4 Unknown, 0 Unchecked, 17.7s Time] [2021-11-23 02:16:11,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18968 states. [2021-11-23 02:16:12,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18968 to 18963. [2021-11-23 02:16:12,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18963 states, 11877 states have (on average 1.330133872189947) internal successors, (15798), 12197 states have internal predecessors, (15798), 5546 states have call successors, (5546), 1570 states have call predecessors, (5546), 1537 states have return successors, (5785), 5419 states have call predecessors, (5785), 5538 states have call successors, (5785) [2021-11-23 02:16:12,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18963 states to 18963 states and 27129 transitions. [2021-11-23 02:16:12,752 INFO L78 Accepts]: Start accepts. Automaton has 18963 states and 27129 transitions. Word has length 205 [2021-11-23 02:16:12,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:16:12,753 INFO L470 AbstractCegarLoop]: Abstraction has 18963 states and 27129 transitions. [2021-11-23 02:16:12,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-23 02:16:12,754 INFO L276 IsEmpty]: Start isEmpty. Operand 18963 states and 27129 transitions. [2021-11-23 02:16:12,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-11-23 02:16:12,763 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:16:12,763 INFO L514 BasicCegarLoop]: trace histogram [16, 12, 12, 12, 12, 12, 12, 5, 4, 4, 4, 4, 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] [2021-11-23 02:16:12,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 02:16:12,763 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)] === [2021-11-23 02:16:12,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:16:12,764 INFO L85 PathProgramCache]: Analyzing trace with hash 673425878, now seen corresponding path program 1 times [2021-11-23 02:16:12,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:16:12,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010288643] [2021-11-23 02:16:12,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:12,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:16:12,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:13,115 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 691 trivial. 0 not checked. [2021-11-23 02:16:13,115 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:16:13,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010288643] [2021-11-23 02:16:13,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010288643] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:16:13,116 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:16:13,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:16:13,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181725990] [2021-11-23 02:16:13,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:16:13,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:16:13,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:16:13,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:16:13,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:16:13,119 INFO L87 Difference]: Start difference. First operand 18963 states and 27129 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-23 02:16:16,340 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:16:18,204 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:16:20,589 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:16:23,979 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:16:26,069 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:16:29,678 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:16:30,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:16:30,541 INFO L93 Difference]: Finished difference Result 18976 states and 27138 transitions. [2021-11-23 02:16:30,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:16:30,542 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 211 [2021-11-23 02:16:30,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:16:30,639 INFO L225 Difference]: With dead ends: 18976 [2021-11-23 02:16:30,640 INFO L226 Difference]: Without dead ends: 18974 [2021-11-23 02:16:30,649 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 [2021-11-23 02:16:30,650 INFO L933 BasicCegarLoop]: 2403 mSDtfsCounter, 2067 mSDsluCounter, 7534 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 2 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2087 SdHoareTripleChecker+Valid, 9090 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:16:30,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2087 Valid, 9090 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1153 Invalid, 4 Unknown, 0 Unchecked, 16.8s Time] [2021-11-23 02:16:30,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18974 states. [2021-11-23 02:16:31,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18974 to 18967. [2021-11-23 02:16:31,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18967 states, 11880 states have (on average 1.3300505050505051) internal successors, (15801), 12200 states have internal predecessors, (15801), 5546 states have call successors, (5546), 1571 states have call predecessors, (5546), 1538 states have return successors, (5785), 5419 states have call predecessors, (5785), 5538 states have call successors, (5785) [2021-11-23 02:16:31,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18967 states to 18967 states and 27132 transitions. [2021-11-23 02:16:31,909 INFO L78 Accepts]: Start accepts. Automaton has 18967 states and 27132 transitions. Word has length 211 [2021-11-23 02:16:31,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:16:31,912 INFO L470 AbstractCegarLoop]: Abstraction has 18967 states and 27132 transitions. [2021-11-23 02:16:31,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-23 02:16:31,912 INFO L276 IsEmpty]: Start isEmpty. Operand 18967 states and 27132 transitions. [2021-11-23 02:16:31,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-11-23 02:16:31,925 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:16:31,925 INFO L514 BasicCegarLoop]: trace histogram [16, 12, 12, 12, 12, 12, 12, 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] [2021-11-23 02:16:31,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 02:16:31,926 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)] === [2021-11-23 02:16:31,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:16:31,926 INFO L85 PathProgramCache]: Analyzing trace with hash 806792797, now seen corresponding path program 1 times [2021-11-23 02:16:31,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:16:31,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910098799] [2021-11-23 02:16:31,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:31,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:16:32,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:32,558 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 710 trivial. 0 not checked. [2021-11-23 02:16:32,558 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:16:32,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910098799] [2021-11-23 02:16:32,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910098799] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:16:32,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:16:32,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:16:32,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87775827] [2021-11-23 02:16:32,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:16:32,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:16:32,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:16:32,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:16:32,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:16:32,561 INFO L87 Difference]: Start difference. First operand 18967 states and 27132 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-23 02:16:36,943 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:16:39,381 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:16:43,185 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:16:45,219 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:16:47,303 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:16:49,711 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:16:53,316 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:16:53,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:16:53,554 INFO L93 Difference]: Finished difference Result 18980 states and 27141 transitions. [2021-11-23 02:16:53,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:16:53,554 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 215 [2021-11-23 02:16:53,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:16:53,658 INFO L225 Difference]: With dead ends: 18980 [2021-11-23 02:16:53,658 INFO L226 Difference]: Without dead ends: 18978 [2021-11-23 02:16:53,672 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 [2021-11-23 02:16:53,673 INFO L933 BasicCegarLoop]: 2405 mSDtfsCounter, 2070 mSDsluCounter, 7538 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 2 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2089 SdHoareTripleChecker+Valid, 9096 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:16:53,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2089 Valid, 9096 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1150 Invalid, 7 Unknown, 0 Unchecked, 20.5s Time] [2021-11-23 02:16:53,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18978 states. [2021-11-23 02:16:54,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18978 to 18971. [2021-11-23 02:16:54,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18971 states, 11883 states have (on average 1.3299671800050492) internal successors, (15804), 12203 states have internal predecessors, (15804), 5546 states have call successors, (5546), 1572 states have call predecessors, (5546), 1539 states have return successors, (5785), 5419 states have call predecessors, (5785), 5538 states have call successors, (5785) [2021-11-23 02:16:54,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18971 states to 18971 states and 27135 transitions. [2021-11-23 02:16:54,933 INFO L78 Accepts]: Start accepts. Automaton has 18971 states and 27135 transitions. Word has length 215 [2021-11-23 02:16:54,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:16:54,934 INFO L470 AbstractCegarLoop]: Abstraction has 18971 states and 27135 transitions. [2021-11-23 02:16:54,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-23 02:16:54,935 INFO L276 IsEmpty]: Start isEmpty. Operand 18971 states and 27135 transitions. [2021-11-23 02:16:54,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-11-23 02:16:54,947 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:16:54,948 INFO L514 BasicCegarLoop]: trace histogram [16, 12, 12, 12, 12, 12, 12, 4, 4, 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] [2021-11-23 02:16:54,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 02:16:54,949 INFO L402 AbstractCegarLoop]: === Iteration 11 === 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)] === [2021-11-23 02:16:54,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:16:54,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1603712570, now seen corresponding path program 1 times [2021-11-23 02:16:54,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:16:54,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105126478] [2021-11-23 02:16:54,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:54,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:16:55,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:55,343 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 654 trivial. 0 not checked. [2021-11-23 02:16:55,344 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:16:55,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105126478] [2021-11-23 02:16:55,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105126478] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:16:55,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:16:55,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:16:55,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774584783] [2021-11-23 02:16:55,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:16:55,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:16:55,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:16:55,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:16:55,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:16:55,347 INFO L87 Difference]: Start difference. First operand 18971 states and 27135 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-23 02:17:00,598 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:17:03,407 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:17:05,500 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:17:08,281 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:17:09,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:17:09,707 INFO L93 Difference]: Finished difference Result 41540 states and 59423 transitions. [2021-11-23 02:17:09,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:17:09,707 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 211 [2021-11-23 02:17:09,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:17:09,807 INFO L225 Difference]: With dead ends: 41540 [2021-11-23 02:17:09,807 INFO L226 Difference]: Without dead ends: 22889 [2021-11-23 02:17:09,911 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 [2021-11-23 02:17:09,912 INFO L933 BasicCegarLoop]: 2446 mSDtfsCounter, 849 mSDsluCounter, 2160 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 15 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 849 SdHoareTripleChecker+Valid, 4340 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:17:09,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [849 Valid, 4340 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 696 Invalid, 3 Unknown, 0 Unchecked, 13.3s Time] [2021-11-23 02:17:09,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22889 states. [2021-11-23 02:17:11,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22889 to 22793. [2021-11-23 02:17:11,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22793 states, 14301 states have (on average 1.3306761764911545) internal successors, (19030), 14677 states have internal predecessors, (19030), 6620 states have call successors, (6620), 1910 states have call predecessors, (6620), 1869 states have return successors, (6859), 6445 states have call predecessors, (6859), 6612 states have call successors, (6859) [2021-11-23 02:17:11,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22793 states to 22793 states and 32509 transitions. [2021-11-23 02:17:11,469 INFO L78 Accepts]: Start accepts. Automaton has 22793 states and 32509 transitions. Word has length 211 [2021-11-23 02:17:11,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:17:11,470 INFO L470 AbstractCegarLoop]: Abstraction has 22793 states and 32509 transitions. [2021-11-23 02:17:11,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-23 02:17:11,471 INFO L276 IsEmpty]: Start isEmpty. Operand 22793 states and 32509 transitions. [2021-11-23 02:17:11,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-11-23 02:17:11,482 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:17:11,483 INFO L514 BasicCegarLoop]: trace histogram [16, 12, 12, 12, 12, 12, 12, 7, 6, 6, 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] [2021-11-23 02:17:11,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 02:17:11,483 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)] === [2021-11-23 02:17:11,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:17:11,484 INFO L85 PathProgramCache]: Analyzing trace with hash -330529184, now seen corresponding path program 1 times [2021-11-23 02:17:11,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:17:11,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39353158] [2021-11-23 02:17:11,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:17:11,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:17:11,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:17:12,142 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 730 trivial. 0 not checked. [2021-11-23 02:17:12,142 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:17:12,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39353158] [2021-11-23 02:17:12,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39353158] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:17:12,143 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:17:12,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:17:12,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998072899] [2021-11-23 02:17:12,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:17:12,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:17:12,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:17:12,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:17:12,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:17:12,148 INFO L87 Difference]: Start difference. First operand 22793 states and 32509 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 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) [2021-11-23 02:17:17,525 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:17:19,558 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:17:21,391 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:17:23,416 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:17:25,434 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:17:28,098 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:17:30,200 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:17:33,143 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:17:35,989 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:17:38,021 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:17:40,040 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:17:40,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:17:40,677 INFO L93 Difference]: Finished difference Result 23045 states and 32819 transitions. [2021-11-23 02:17:40,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:17:40,678 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 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 220 [2021-11-23 02:17:40,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:17:40,750 INFO L225 Difference]: With dead ends: 23045 [2021-11-23 02:17:40,751 INFO L226 Difference]: Without dead ends: 23043 [2021-11-23 02:17:40,760 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 [2021-11-23 02:17:40,760 INFO L933 BasicCegarLoop]: 2212 mSDtfsCounter, 2145 mSDsluCounter, 6286 mSDsCounter, 0 mSdLazyCounter, 1023 mSolverCounterSat, 1 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2158 SdHoareTripleChecker+Valid, 7773 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1023 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:17:40,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2158 Valid, 7773 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1023 Invalid, 8 Unknown, 0 Unchecked, 27.9s Time] [2021-11-23 02:17:40,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23043 states. [2021-11-23 02:17:42,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23043 to 23038. [2021-11-23 02:17:42,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23038 states, 14435 states have (on average 1.3295462417734674) internal successors, (19192), 14813 states have internal predecessors, (19192), 6691 states have call successors, (6691), 1949 states have call predecessors, (6691), 1909 states have return successors, (6930), 6516 states have call predecessors, (6930), 6683 states have call successors, (6930) [2021-11-23 02:17:42,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23038 states to 23038 states and 32813 transitions. [2021-11-23 02:17:42,254 INFO L78 Accepts]: Start accepts. Automaton has 23038 states and 32813 transitions. Word has length 220 [2021-11-23 02:17:42,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:17:42,255 INFO L470 AbstractCegarLoop]: Abstraction has 23038 states and 32813 transitions. [2021-11-23 02:17:42,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 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) [2021-11-23 02:17:42,255 INFO L276 IsEmpty]: Start isEmpty. Operand 23038 states and 32813 transitions. [2021-11-23 02:17:42,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-11-23 02:17:42,279 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:17:42,280 INFO L514 BasicCegarLoop]: trace histogram [16, 12, 12, 12, 12, 12, 12, 8, 7, 7, 4, 4, 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] [2021-11-23 02:17:42,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 02:17:42,281 INFO L402 AbstractCegarLoop]: === Iteration 13 === 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)] === [2021-11-23 02:17:42,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:17:42,282 INFO L85 PathProgramCache]: Analyzing trace with hash 841767911, now seen corresponding path program 1 times [2021-11-23 02:17:42,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:17:42,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885260645] [2021-11-23 02:17:42,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:17:42,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:17:42,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:17:42,802 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 751 trivial. 0 not checked. [2021-11-23 02:17:42,802 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:17:42,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885260645] [2021-11-23 02:17:42,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885260645] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:17:42,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:17:42,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:17:42,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153079911] [2021-11-23 02:17:42,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:17:42,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:17:42,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:17:42,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:17:42,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:17:42,805 INFO L87 Difference]: Start difference. First operand 23038 states and 32813 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-23 02:17:48,459 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:17:50,623 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:17:53,609 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:17:55,703 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:17:59,158 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:18:01,423 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:18:02,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:18:02,389 INFO L93 Difference]: Finished difference Result 23051 states and 32822 transitions. [2021-11-23 02:18:02,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:18:02,390 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 226 [2021-11-23 02:18:02,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:18:02,544 INFO L225 Difference]: With dead ends: 23051 [2021-11-23 02:18:02,544 INFO L226 Difference]: Without dead ends: 23049 [2021-11-23 02:18:02,551 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 [2021-11-23 02:18:02,552 INFO L933 BasicCegarLoop]: 2397 mSDtfsCounter, 2067 mSDsluCounter, 7520 mSDsCounter, 0 mSdLazyCounter, 1149 mSolverCounterSat, 2 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2084 SdHoareTripleChecker+Valid, 9072 SdHoareTripleChecker+Invalid, 1156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1149 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:18:02,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2084 Valid, 9072 Invalid, 1156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1149 Invalid, 5 Unknown, 0 Unchecked, 18.8s Time] [2021-11-23 02:18:02,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23049 states. [2021-11-23 02:18:03,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23049 to 23042. [2021-11-23 02:18:03,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23042 states, 14438 states have (on average 1.32947776700374) internal successors, (19195), 14816 states have internal predecessors, (19195), 6691 states have call successors, (6691), 1950 states have call predecessors, (6691), 1910 states have return successors, (6930), 6516 states have call predecessors, (6930), 6683 states have call successors, (6930) [2021-11-23 02:18:03,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23042 states to 23042 states and 32816 transitions. [2021-11-23 02:18:03,669 INFO L78 Accepts]: Start accepts. Automaton has 23042 states and 32816 transitions. Word has length 226 [2021-11-23 02:18:03,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:18:03,669 INFO L470 AbstractCegarLoop]: Abstraction has 23042 states and 32816 transitions. [2021-11-23 02:18:03,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-23 02:18:03,670 INFO L276 IsEmpty]: Start isEmpty. Operand 23042 states and 32816 transitions. [2021-11-23 02:18:03,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-11-23 02:18:03,679 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:18:03,679 INFO L514 BasicCegarLoop]: trace histogram [16, 12, 12, 12, 12, 12, 12, 9, 8, 8, 4, 4, 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] [2021-11-23 02:18:03,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 02:18:03,680 INFO L402 AbstractCegarLoop]: === Iteration 14 === 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)] === [2021-11-23 02:18:03,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:18:03,681 INFO L85 PathProgramCache]: Analyzing trace with hash 292679318, now seen corresponding path program 1 times [2021-11-23 02:18:03,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:18:03,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779774631] [2021-11-23 02:18:03,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:18:03,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:18:04,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:18:04,377 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 779 trivial. 0 not checked. [2021-11-23 02:18:04,377 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:18:04,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779774631] [2021-11-23 02:18:04,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779774631] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:18:04,378 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:18:04,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:18:04,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662939035] [2021-11-23 02:18:04,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:18:04,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:18:04,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:18:04,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:18:04,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:18:04,380 INFO L87 Difference]: Start difference. First operand 23042 states and 32816 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 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) [2021-11-23 02:18:08,393 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:18:12,009 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:18:14,902 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:18:17,000 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:18:21,164 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:18:23,203 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:18:24,718 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:18:25,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:18:25,411 INFO L93 Difference]: Finished difference Result 23057 states and 32828 transitions. [2021-11-23 02:18:25,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:18:25,412 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 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 231 [2021-11-23 02:18:25,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:18:25,481 INFO L225 Difference]: With dead ends: 23057 [2021-11-23 02:18:25,481 INFO L226 Difference]: Without dead ends: 23055 [2021-11-23 02:18:25,489 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 [2021-11-23 02:18:25,490 INFO L933 BasicCegarLoop]: 2201 mSDtfsCounter, 2070 mSDsluCounter, 6263 mSDsCounter, 0 mSdLazyCounter, 1027 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2086 SdHoareTripleChecker+Valid, 7740 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1027 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:18:25,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2086 Valid, 7740 Invalid, 1032 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 1027 Invalid, 4 Unknown, 0 Unchecked, 20.0s Time] [2021-11-23 02:18:25,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23055 states. [2021-11-23 02:18:26,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23055 to 23050. [2021-11-23 02:18:26,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23050 states, 14444 states have (on average 1.3293409027970091) internal successors, (19201), 14822 states have internal predecessors, (19201), 6691 states have call successors, (6691), 1952 states have call predecessors, (6691), 1912 states have return successors, (6930), 6516 states have call predecessors, (6930), 6683 states have call successors, (6930) [2021-11-23 02:18:26,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23050 states to 23050 states and 32822 transitions. [2021-11-23 02:18:26,631 INFO L78 Accepts]: Start accepts. Automaton has 23050 states and 32822 transitions. Word has length 231 [2021-11-23 02:18:26,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:18:26,631 INFO L470 AbstractCegarLoop]: Abstraction has 23050 states and 32822 transitions. [2021-11-23 02:18:26,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 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) [2021-11-23 02:18:26,632 INFO L276 IsEmpty]: Start isEmpty. Operand 23050 states and 32822 transitions. [2021-11-23 02:18:26,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-11-23 02:18:26,646 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:18:26,646 INFO L514 BasicCegarLoop]: trace histogram [16, 12, 12, 12, 12, 12, 12, 10, 9, 9, 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] [2021-11-23 02:18:26,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 02:18:26,647 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)] === [2021-11-23 02:18:26,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:18:26,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1649927779, now seen corresponding path program 1 times [2021-11-23 02:18:26,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:18:26,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908928877] [2021-11-23 02:18:26,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:18:26,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:18:26,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:18:27,313 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 814 trivial. 0 not checked. [2021-11-23 02:18:27,314 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:18:27,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908928877] [2021-11-23 02:18:27,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908928877] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:18:27,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:18:27,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:18:27,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820117470] [2021-11-23 02:18:27,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:18:27,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:18:27,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:18:27,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:18:27,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:18:27,317 INFO L87 Difference]: Start difference. First operand 23050 states and 32822 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 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) [2021-11-23 02:18:31,574 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:18:33,884 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:18:36,708 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:18:39,820 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:18:41,916 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:18:46,573 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:18:47,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:18:47,518 INFO L93 Difference]: Finished difference Result 23063 states and 32831 transitions. [2021-11-23 02:18:47,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:18:47,518 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 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 235 [2021-11-23 02:18:47,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:18:47,587 INFO L225 Difference]: With dead ends: 23063 [2021-11-23 02:18:47,587 INFO L226 Difference]: Without dead ends: 23061 [2021-11-23 02:18:47,596 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 [2021-11-23 02:18:47,597 INFO L933 BasicCegarLoop]: 2397 mSDtfsCounter, 2066 mSDsluCounter, 7520 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 2 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2081 SdHoareTripleChecker+Valid, 9072 SdHoareTripleChecker+Invalid, 1156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:18:47,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2081 Valid, 9072 Invalid, 1156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1150 Invalid, 4 Unknown, 0 Unchecked, 19.2s Time] [2021-11-23 02:18:47,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23061 states. [2021-11-23 02:18:48,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23061 to 23054. [2021-11-23 02:18:48,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23054 states, 14447 states have (on average 1.3292725133245658) internal successors, (19204), 14825 states have internal predecessors, (19204), 6691 states have call successors, (6691), 1953 states have call predecessors, (6691), 1913 states have return successors, (6930), 6516 states have call predecessors, (6930), 6683 states have call successors, (6930) [2021-11-23 02:18:48,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23054 states to 23054 states and 32825 transitions. [2021-11-23 02:18:48,793 INFO L78 Accepts]: Start accepts. Automaton has 23054 states and 32825 transitions. Word has length 235 [2021-11-23 02:18:48,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:18:48,795 INFO L470 AbstractCegarLoop]: Abstraction has 23054 states and 32825 transitions. [2021-11-23 02:18:48,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 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) [2021-11-23 02:18:48,795 INFO L276 IsEmpty]: Start isEmpty. Operand 23054 states and 32825 transitions. [2021-11-23 02:18:48,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-11-23 02:18:48,808 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:18:48,809 INFO L514 BasicCegarLoop]: trace histogram [16, 12, 12, 12, 12, 12, 12, 11, 10, 10, 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] [2021-11-23 02:18:48,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 02:18:48,809 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)] === [2021-11-23 02:18:48,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:18:48,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1627230799, now seen corresponding path program 1 times [2021-11-23 02:18:48,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:18:48,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431446315] [2021-11-23 02:18:48,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:18:48,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:18:48,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:18:49,426 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2021-11-23 02:18:49,426 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:18:49,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431446315] [2021-11-23 02:18:49,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431446315] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:18:49,429 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:18:49,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:18:49,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906896007] [2021-11-23 02:18:49,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:18:49,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:18:49,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:18:49,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:18:49,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:18:49,432 INFO L87 Difference]: Start difference. First operand 23054 states and 32825 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 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) [2021-11-23 02:18:51,433 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:18:53,938 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:18:56,138 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:18:58,593 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:19:01,391 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:19:03,499 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:19:05,812 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:19:09,056 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:19:09,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:19:09,984 INFO L93 Difference]: Finished difference Result 23067 states and 32834 transitions. [2021-11-23 02:19:09,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:19:09,985 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 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 241 [2021-11-23 02:19:09,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:19:10,069 INFO L225 Difference]: With dead ends: 23067 [2021-11-23 02:19:10,070 INFO L226 Difference]: Without dead ends: 23065 [2021-11-23 02:19:10,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:19:10,084 INFO L933 BasicCegarLoop]: 2397 mSDtfsCounter, 2066 mSDsluCounter, 7520 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 2 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2080 SdHoareTripleChecker+Valid, 9072 SdHoareTripleChecker+Invalid, 1156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:19:10,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2080 Valid, 9072 Invalid, 1156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1150 Invalid, 4 Unknown, 0 Unchecked, 19.6s Time] [2021-11-23 02:19:10,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23065 states. [2021-11-23 02:19:11,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23065 to 23058. [2021-11-23 02:19:11,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23058 states, 14450 states have (on average 1.329204152249135) internal successors, (19207), 14828 states have internal predecessors, (19207), 6691 states have call successors, (6691), 1954 states have call predecessors, (6691), 1914 states have return successors, (6930), 6516 states have call predecessors, (6930), 6683 states have call successors, (6930) [2021-11-23 02:19:11,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23058 states to 23058 states and 32828 transitions. [2021-11-23 02:19:11,185 INFO L78 Accepts]: Start accepts. Automaton has 23058 states and 32828 transitions. Word has length 241 [2021-11-23 02:19:11,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:19:11,186 INFO L470 AbstractCegarLoop]: Abstraction has 23058 states and 32828 transitions. [2021-11-23 02:19:11,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 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) [2021-11-23 02:19:11,187 INFO L276 IsEmpty]: Start isEmpty. Operand 23058 states and 32828 transitions. [2021-11-23 02:19:11,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2021-11-23 02:19:11,197 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:19:11,198 INFO L514 BasicCegarLoop]: trace histogram [17, 12, 12, 12, 12, 12, 12, 4, 4, 3, 3, 3, 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] [2021-11-23 02:19:11,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 02:19:11,198 INFO L402 AbstractCegarLoop]: === Iteration 17 === 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)] === [2021-11-23 02:19:11,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:19:11,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1905663277, now seen corresponding path program 1 times [2021-11-23 02:19:11,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:19:11,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377817062] [2021-11-23 02:19:11,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:19:11,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:19:11,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:19:11,483 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 698 trivial. 0 not checked. [2021-11-23 02:19:11,483 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:19:11,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377817062] [2021-11-23 02:19:11,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377817062] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:19:11,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:19:11,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:19:11,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922484935] [2021-11-23 02:19:11,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:19:11,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:19:11,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:19:11,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:19:11,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:19:11,486 INFO L87 Difference]: Start difference. First operand 23058 states and 32828 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-23 02:19:16,721 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:19:19,612 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:19:21,487 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:19:24,793 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:19:26,897 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:19:28,508 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:19:29,648 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:19:31,749 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:19:32,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:19:32,567 INFO L93 Difference]: Finished difference Result 54513 states and 77673 transitions. [2021-11-23 02:19:32,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:19:32,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) Word has length 237 [2021-11-23 02:19:32,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:19:32,704 INFO L225 Difference]: With dead ends: 54513 [2021-11-23 02:19:32,704 INFO L226 Difference]: Without dead ends: 31775 [2021-11-23 02:19:32,893 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 [2021-11-23 02:19:32,894 INFO L933 BasicCegarLoop]: 3656 mSDtfsCounter, 1980 mSDsluCounter, 2198 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 4 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1991 SdHoareTripleChecker+Valid, 5579 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:19:32,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1991 Valid, 5579 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 841 Invalid, 5 Unknown, 0 Unchecked, 19.6s Time] [2021-11-23 02:19:32,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31775 states. [2021-11-23 02:19:34,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31775 to 31638. [2021-11-23 02:19:34,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31638 states, 19860 states have (on average 1.3320745216515608) internal successors, (26455), 20404 states have internal predecessors, (26455), 9159 states have call successors, (9159), 2670 states have call predecessors, (9159), 2616 states have return successors, (9490), 8894 states have call predecessors, (9490), 9151 states have call successors, (9490) [2021-11-23 02:19:34,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31638 states to 31638 states and 45104 transitions. [2021-11-23 02:19:34,387 INFO L78 Accepts]: Start accepts. Automaton has 31638 states and 45104 transitions. Word has length 237 [2021-11-23 02:19:34,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:19:34,388 INFO L470 AbstractCegarLoop]: Abstraction has 31638 states and 45104 transitions. [2021-11-23 02:19:34,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-23 02:19:34,389 INFO L276 IsEmpty]: Start isEmpty. Operand 31638 states and 45104 transitions. [2021-11-23 02:19:34,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-11-23 02:19:34,401 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:19:34,401 INFO L514 BasicCegarLoop]: trace histogram [16, 12, 12, 12, 12, 12, 12, 12, 11, 11, 4, 4, 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] [2021-11-23 02:19:34,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-23 02:19:34,402 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)] === [2021-11-23 02:19:34,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:19:34,402 INFO L85 PathProgramCache]: Analyzing trace with hash -769589721, now seen corresponding path program 1 times [2021-11-23 02:19:34,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:19:34,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649941073] [2021-11-23 02:19:34,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:19:34,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:19:34,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:19:34,766 INFO L134 CoverageAnalysis]: Checked inductivity of 909 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 887 trivial. 0 not checked. [2021-11-23 02:19:34,767 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:19:34,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649941073] [2021-11-23 02:19:34,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649941073] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:19:34,767 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:19:34,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:19:34,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704459106] [2021-11-23 02:19:34,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:19:34,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:19:34,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:19:34,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:19:34,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:19:34,769 INFO L87 Difference]: Start difference. First operand 31638 states and 45104 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 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) [2021-11-23 02:19:38,043 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:19:40,490 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:19:43,824 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:19:46,809 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:19:48,890 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:19:51,943 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:19:54,184 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:19:55,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:19:55,302 INFO L93 Difference]: Finished difference Result 31651 states and 45113 transitions. [2021-11-23 02:19:55,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:19:55,302 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 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 246 [2021-11-23 02:19:55,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:19:55,525 INFO L225 Difference]: With dead ends: 31651 [2021-11-23 02:19:55,526 INFO L226 Difference]: Without dead ends: 31649 [2021-11-23 02:19:55,537 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 [2021-11-23 02:19:55,538 INFO L933 BasicCegarLoop]: 2397 mSDtfsCounter, 2067 mSDsluCounter, 7520 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 2 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2080 SdHoareTripleChecker+Valid, 9072 SdHoareTripleChecker+Invalid, 1156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:19:55,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2080 Valid, 9072 Invalid, 1156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1150 Invalid, 4 Unknown, 0 Unchecked, 19.3s Time] [2021-11-23 02:19:55,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31649 states. [2021-11-23 02:19:56,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31649 to 31642. [2021-11-23 02:19:56,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31642 states, 19863 states have (on average 1.3320243669133565) internal successors, (26458), 20407 states have internal predecessors, (26458), 9159 states have call successors, (9159), 2671 states have call predecessors, (9159), 2617 states have return successors, (9490), 8894 states have call predecessors, (9490), 9151 states have call successors, (9490) [2021-11-23 02:19:56,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31642 states to 31642 states and 45107 transitions. [2021-11-23 02:19:56,991 INFO L78 Accepts]: Start accepts. Automaton has 31642 states and 45107 transitions. Word has length 246 [2021-11-23 02:19:56,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:19:56,992 INFO L470 AbstractCegarLoop]: Abstraction has 31642 states and 45107 transitions. [2021-11-23 02:19:56,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 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) [2021-11-23 02:19:56,992 INFO L276 IsEmpty]: Start isEmpty. Operand 31642 states and 45107 transitions. [2021-11-23 02:19:57,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-11-23 02:19:57,005 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:19:57,006 INFO L514 BasicCegarLoop]: trace histogram [16, 13, 12, 12, 12, 12, 12, 12, 12, 12, 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] [2021-11-23 02:19:57,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-23 02:19:57,006 INFO L402 AbstractCegarLoop]: === Iteration 19 === 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)] === [2021-11-23 02:19:57,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:19:57,007 INFO L85 PathProgramCache]: Analyzing trace with hash -954743808, now seen corresponding path program 1 times [2021-11-23 02:19:57,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:19:57,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062027214] [2021-11-23 02:19:57,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:19:57,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:19:57,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:19:57,372 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 934 trivial. 0 not checked. [2021-11-23 02:19:57,372 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:19:57,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062027214] [2021-11-23 02:19:57,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062027214] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:19:57,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:19:57,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:19:57,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157537278] [2021-11-23 02:19:57,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:19:57,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:19:57,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:19:57,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:19:57,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:19:57,375 INFO L87 Difference]: Start difference. First operand 31642 states and 45107 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 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) [2021-11-23 02:20:00,652 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:20:03,005 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:20:05,450 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:20:08,700 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:20:10,797 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:20:13,282 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:20:14,395 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:20:17,533 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:20:19,565 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:20:20,986 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:20:22,701 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:20:24,731 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:20:26,761 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:20:28,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:20:28,533 INFO L93 Difference]: Finished difference Result 61493 states and 88897 transitions. [2021-11-23 02:20:28,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:20:28,534 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 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 250 [2021-11-23 02:20:28,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:20:28,847 INFO L225 Difference]: With dead ends: 61493 [2021-11-23 02:20:28,848 INFO L226 Difference]: Without dead ends: 61489 [2021-11-23 02:20:28,877 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 [2021-11-23 02:20:28,877 INFO L933 BasicCegarLoop]: 2413 mSDtfsCounter, 2061 mSDsluCounter, 7542 mSDsCounter, 0 mSdLazyCounter, 1175 mSolverCounterSat, 3 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2066 SdHoareTripleChecker+Valid, 9092 SdHoareTripleChecker+Invalid, 1186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1175 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:20:28,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2066 Valid, 9092 Invalid, 1186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1175 Invalid, 8 Unknown, 0 Unchecked, 28.9s Time] [2021-11-23 02:20:28,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61489 states. [2021-11-23 02:20:32,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61489 to 61454. [2021-11-23 02:20:32,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61454 states, 38753 states have (on average 1.3342966996103527) internal successors, (51708), 39852 states have internal predecessors, (51708), 17709 states have call successors, (17709), 5140 states have call predecessors, (17709), 4989 states have return successors, (19443), 17088 states have call predecessors, (19443), 17693 states have call successors, (19443) [2021-11-23 02:20:32,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61454 states to 61454 states and 88860 transitions. [2021-11-23 02:20:32,612 INFO L78 Accepts]: Start accepts. Automaton has 61454 states and 88860 transitions. Word has length 250 [2021-11-23 02:20:32,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:20:32,613 INFO L470 AbstractCegarLoop]: Abstraction has 61454 states and 88860 transitions. [2021-11-23 02:20:32,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 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) [2021-11-23 02:20:32,614 INFO L276 IsEmpty]: Start isEmpty. Operand 61454 states and 88860 transitions. [2021-11-23 02:20:32,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-23 02:20:32,627 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:20:32,628 INFO L514 BasicCegarLoop]: trace histogram [16, 14, 13, 13, 12, 12, 12, 12, 12, 12, 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] [2021-11-23 02:20:32,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-23 02:20:32,628 INFO L402 AbstractCegarLoop]: === Iteration 20 === 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)] === [2021-11-23 02:20:32,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:20:32,629 INFO L85 PathProgramCache]: Analyzing trace with hash 2057446621, now seen corresponding path program 1 times [2021-11-23 02:20:32,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:20:32,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63349279] [2021-11-23 02:20:32,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:20:32,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:20:32,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:20:33,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 982 trivial. 0 not checked. [2021-11-23 02:20:33,228 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:20:33,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63349279] [2021-11-23 02:20:33,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63349279] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:20:33,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:20:33,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:20:33,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657250402] [2021-11-23 02:20:33,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:20:33,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:20:33,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:20:33,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:20:33,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:20:33,231 INFO L87 Difference]: Start difference. First operand 61454 states and 88860 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 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) [2021-11-23 02:20:38,327 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:20:40,749 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:20:44,081 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:20:46,186 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:20:49,720 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:20:51,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:20:51,973 INFO L93 Difference]: Finished difference Result 61467 states and 88869 transitions. [2021-11-23 02:20:51,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:20:51,974 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 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 255 [2021-11-23 02:20:51,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:20:52,228 INFO L225 Difference]: With dead ends: 61467 [2021-11-23 02:20:52,228 INFO L226 Difference]: Without dead ends: 61249 [2021-11-23 02:20:52,254 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 [2021-11-23 02:20:52,255 INFO L933 BasicCegarLoop]: 2404 mSDtfsCounter, 2063 mSDsluCounter, 7533 mSDsCounter, 0 mSdLazyCounter, 1146 mSolverCounterSat, 2 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2076 SdHoareTripleChecker+Valid, 9093 SdHoareTripleChecker+Invalid, 1153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1146 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:20:52,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2076 Valid, 9093 Invalid, 1153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1146 Invalid, 5 Unknown, 0 Unchecked, 16.3s Time] [2021-11-23 02:20:52,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61249 states. [2021-11-23 02:20:55,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61249 to 61242. [2021-11-23 02:20:55,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61242 states, 38687 states have (on average 1.3334453433970068) internal successors, (51587), 39732 states have internal predecessors, (51587), 17583 states have call successors, (17583), 5107 states have call predecessors, (17583), 4969 states have return successors, (19321), 17029 states have call predecessors, (19321), 17571 states have call successors, (19321) [2021-11-23 02:20:56,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61242 states to 61242 states and 88491 transitions. [2021-11-23 02:20:56,128 INFO L78 Accepts]: Start accepts. Automaton has 61242 states and 88491 transitions. Word has length 255 [2021-11-23 02:20:56,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:20:56,128 INFO L470 AbstractCegarLoop]: Abstraction has 61242 states and 88491 transitions. [2021-11-23 02:20:56,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 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) [2021-11-23 02:20:56,129 INFO L276 IsEmpty]: Start isEmpty. Operand 61242 states and 88491 transitions. [2021-11-23 02:20:56,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-11-23 02:20:56,142 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:20:56,142 INFO L514 BasicCegarLoop]: trace histogram [19, 12, 12, 12, 12, 12, 12, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:20:56,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-23 02:20:56,143 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)] === [2021-11-23 02:20:56,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:20:56,143 INFO L85 PathProgramCache]: Analyzing trace with hash 133342315, now seen corresponding path program 1 times [2021-11-23 02:20:56,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:20:56,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136842558] [2021-11-23 02:20:56,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:20:56,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:20:56,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:20:56,455 INFO L134 CoverageAnalysis]: Checked inductivity of 793 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2021-11-23 02:20:56,455 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:20:56,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136842558] [2021-11-23 02:20:56,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136842558] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:20:56,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:20:56,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:20:56,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742654426] [2021-11-23 02:20:56,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:20:56,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:20:56,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:20:56,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:20:56,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:20:56,458 INFO L87 Difference]: Start difference. First operand 61242 states and 88491 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (28), 4 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-23 02:21:03,022 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:21:07,359 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:21:09,748 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:21:12,759 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:21:17,298 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:21:19,428 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:21:22,451 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:21:25,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:21:25,730 INFO L93 Difference]: Finished difference Result 139045 states and 200936 transitions. [2021-11-23 02:21:25,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:21:25,731 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (28), 4 states have call predecessors, (28), 3 states have call successors, (28) Word has length 262 [2021-11-23 02:21:25,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:21:26,066 INFO L225 Difference]: With dead ends: 139045 [2021-11-23 02:21:26,067 INFO L226 Difference]: Without dead ends: 78123 [2021-11-23 02:21:26,399 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 [2021-11-23 02:21:26,400 INFO L933 BasicCegarLoop]: 3655 mSDtfsCounter, 1969 mSDsluCounter, 10592 mSDsCounter, 0 mSdLazyCounter, 1931 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1980 SdHoareTripleChecker+Valid, 12890 SdHoareTripleChecker+Invalid, 1936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1931 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:21:26,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1980 Valid, 12890 Invalid, 1936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1931 Invalid, 4 Unknown, 0 Unchecked, 25.1s Time] [2021-11-23 02:21:26,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78123 states. [2021-11-23 02:21:30,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78123 to 77868. [2021-11-23 02:21:30,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77868 states, 49195 states have (on average 1.3348714300233764) internal successors, (65669), 50560 states have internal predecessors, (65669), 22351 states have call successors, (22351), 6469 states have call predecessors, (22351), 6319 states have return successors, (24585), 21637 states have call predecessors, (24585), 22339 states have call successors, (24585) [2021-11-23 02:21:30,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77868 states to 77868 states and 112605 transitions. [2021-11-23 02:21:30,661 INFO L78 Accepts]: Start accepts. Automaton has 77868 states and 112605 transitions. Word has length 262 [2021-11-23 02:21:30,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:21:30,662 INFO L470 AbstractCegarLoop]: Abstraction has 77868 states and 112605 transitions. [2021-11-23 02:21:30,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (28), 4 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-23 02:21:30,662 INFO L276 IsEmpty]: Start isEmpty. Operand 77868 states and 112605 transitions. [2021-11-23 02:21:30,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2021-11-23 02:21:30,674 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:21:30,675 INFO L514 BasicCegarLoop]: trace histogram [18, 12, 12, 12, 12, 12, 12, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:21:30,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-23 02:21:30,675 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)] === [2021-11-23 02:21:30,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:21:30,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1173903298, now seen corresponding path program 1 times [2021-11-23 02:21:30,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:21:30,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755190687] [2021-11-23 02:21:30,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:21:30,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:21:30,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:21:30,992 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2021-11-23 02:21:30,993 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:21:30,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755190687] [2021-11-23 02:21:30,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755190687] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:21:30,993 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:21:30,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:21:30,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973476599] [2021-11-23 02:21:30,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:21:30,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:21:30,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:21:30,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:21:30,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:21:30,996 INFO L87 Difference]: Start difference. First operand 77868 states and 112605 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2021-11-23 02:21:35,960 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:21:38,443 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:21:41,254 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:21:43,317 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:21:45,374 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:21:47,473 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:21:50,284 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:21:53,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:21:53,356 INFO L93 Difference]: Finished difference Result 157098 states and 230760 transitions. [2021-11-23 02:21:53,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:21:53,360 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) Word has length 273 [2021-11-23 02:21:53,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:21:53,837 INFO L225 Difference]: With dead ends: 157098 [2021-11-23 02:21:53,838 INFO L226 Difference]: Without dead ends: 79550 [2021-11-23 02:21:54,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:21:54,508 INFO L933 BasicCegarLoop]: 1986 mSDtfsCounter, 54 mSDsluCounter, 4456 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 37 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 5880 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:21:54,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 5880 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 868 Invalid, 6 Unknown, 0 Unchecked, 18.0s Time] [2021-11-23 02:21:54,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79550 states. [2021-11-23 02:21:58,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79550 to 79468. [2021-11-23 02:21:58,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79468 states, 50155 states have (on average 1.33284817067092) internal successors, (66849), 51540 states have internal predecessors, (66849), 22951 states have call successors, (22951), 6509 states have call predecessors, (22951), 6359 states have return successors, (25189), 22217 states have call predecessors, (25189), 22939 states have call successors, (25189) [2021-11-23 02:21:58,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79468 states to 79468 states and 114989 transitions. [2021-11-23 02:21:58,862 INFO L78 Accepts]: Start accepts. Automaton has 79468 states and 114989 transitions. Word has length 273 [2021-11-23 02:21:58,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:21:58,863 INFO L470 AbstractCegarLoop]: Abstraction has 79468 states and 114989 transitions. [2021-11-23 02:21:58,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2021-11-23 02:21:58,864 INFO L276 IsEmpty]: Start isEmpty. Operand 79468 states and 114989 transitions. [2021-11-23 02:21:58,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2021-11-23 02:21:58,877 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:21:58,877 INFO L514 BasicCegarLoop]: trace histogram [18, 12, 12, 12, 12, 12, 12, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:21:58,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-23 02:21:58,877 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)] === [2021-11-23 02:21:58,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:21:58,878 INFO L85 PathProgramCache]: Analyzing trace with hash 2129210649, now seen corresponding path program 1 times [2021-11-23 02:21:58,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:21:58,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552147215] [2021-11-23 02:21:58,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:21:58,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:21:59,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:21:59,748 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2021-11-23 02:21:59,749 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:21:59,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552147215] [2021-11-23 02:21:59,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552147215] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:21:59,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:21:59,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:21:59,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237270622] [2021-11-23 02:21:59,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:21:59,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:21:59,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:21:59,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:21:59,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:21:59,753 INFO L87 Difference]: Start difference. First operand 79468 states and 114989 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-23 02:22:04,041 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:22:05,378 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:22:07,857 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:22:11,212 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:22:13,314 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:22:17,724 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:22:19,756 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:22:21,787 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:22:24,841 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:22:27,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:22:27,832 INFO L93 Difference]: Finished difference Result 97060 states and 140688 transitions. [2021-11-23 02:22:27,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:22:27,833 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 273 [2021-11-23 02:22:27,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:22:28,284 INFO L225 Difference]: With dead ends: 97060 [2021-11-23 02:22:28,284 INFO L226 Difference]: Without dead ends: 97058 [2021-11-23 02:22:28,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:22:28,337 INFO L933 BasicCegarLoop]: 2442 mSDtfsCounter, 2020 mSDsluCounter, 7613 mSDsCounter, 0 mSdLazyCounter, 1168 mSolverCounterSat, 3 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2026 SdHoareTripleChecker+Valid, 9191 SdHoareTripleChecker+Invalid, 1177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1168 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:22:28,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2026 Valid, 9191 Invalid, 1177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1168 Invalid, 6 Unknown, 0 Unchecked, 24.4s Time] [2021-11-23 02:22:28,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97058 states. [2021-11-23 02:22:33,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97058 to 96970. [2021-11-23 02:22:33,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96970 states, 61285 states have (on average 1.3335726523619156) internal successors, (81728), 63008 states have internal predecessors, (81728), 27929 states have call successors, (27929), 7951 states have call predecessors, (27929), 7753 states have return successors, (30901), 26971 states have call predecessors, (30901), 27917 states have call successors, (30901) [2021-11-23 02:22:33,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96970 states to 96970 states and 140558 transitions. [2021-11-23 02:22:33,930 INFO L78 Accepts]: Start accepts. Automaton has 96970 states and 140558 transitions. Word has length 273 [2021-11-23 02:22:33,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:22:33,930 INFO L470 AbstractCegarLoop]: Abstraction has 96970 states and 140558 transitions. [2021-11-23 02:22:33,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-23 02:22:33,930 INFO L276 IsEmpty]: Start isEmpty. Operand 96970 states and 140558 transitions. [2021-11-23 02:22:33,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-11-23 02:22:33,940 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:22:33,940 INFO L514 BasicCegarLoop]: trace histogram [19, 12, 12, 12, 12, 12, 12, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:22:33,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-23 02:22:33,941 INFO L402 AbstractCegarLoop]: === Iteration 24 === 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)] === [2021-11-23 02:22:33,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:22:33,941 INFO L85 PathProgramCache]: Analyzing trace with hash -497095122, now seen corresponding path program 1 times [2021-11-23 02:22:33,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:22:33,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127392546] [2021-11-23 02:22:33,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:22:33,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:22:34,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:22:34,240 INFO L134 CoverageAnalysis]: Checked inductivity of 793 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2021-11-23 02:22:34,240 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:22:34,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127392546] [2021-11-23 02:22:34,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127392546] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:22:34,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:22:34,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:22:34,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372344758] [2021-11-23 02:22:34,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:22:34,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:22:34,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:22:34,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:22:34,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:22:34,242 INFO L87 Difference]: Start difference. First operand 96970 states and 140558 transitions. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (28), 4 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-23 02:22:37,574 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:22:40,698 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:22:45,729 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:22:48,096 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:22:55,238 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:22:57,366 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:23:01,569 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:23:03,595 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:23:05,623 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:23:08,705 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:23:13,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:23:13,260 INFO L93 Difference]: Finished difference Result 215073 states and 311793 transitions. [2021-11-23 02:23:13,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:23:13,261 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (28), 4 states have call predecessors, (28), 3 states have call successors, (28) Word has length 263 [2021-11-23 02:23:13,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:23:14,218 INFO L225 Difference]: With dead ends: 215073 [2021-11-23 02:23:14,218 INFO L226 Difference]: Without dead ends: 118423 [2021-11-23 02:23:14,547 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 [2021-11-23 02:23:14,547 INFO L933 BasicCegarLoop]: 3663 mSDtfsCounter, 1972 mSDsluCounter, 10610 mSDsCounter, 0 mSdLazyCounter, 1938 mSolverCounterSat, 2 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1983 SdHoareTripleChecker+Valid, 12914 SdHoareTripleChecker+Invalid, 1947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1938 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:23:14,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1983 Valid, 12914 Invalid, 1947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1938 Invalid, 7 Unknown, 0 Unchecked, 33.0s Time] [2021-11-23 02:23:14,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118423 states. [2021-11-23 02:23:20,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118423 to 118144. [2021-11-23 02:23:20,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118144 states, 74689 states have (on average 1.3341054238241241) internal successors, (99643), 76824 states have internal predecessors, (99643), 34003 states have call successors, (34003), 9666 states have call predecessors, (34003), 9449 states have return successors, (37659), 32827 states have call predecessors, (37659), 33991 states have call successors, (37659) [2021-11-23 02:23:21,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118144 states to 118144 states and 171305 transitions. [2021-11-23 02:23:21,911 INFO L78 Accepts]: Start accepts. Automaton has 118144 states and 171305 transitions. Word has length 263 [2021-11-23 02:23:21,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:23:21,912 INFO L470 AbstractCegarLoop]: Abstraction has 118144 states and 171305 transitions. [2021-11-23 02:23:21,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (28), 4 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-23 02:23:21,912 INFO L276 IsEmpty]: Start isEmpty. Operand 118144 states and 171305 transitions. [2021-11-23 02:23:21,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-11-23 02:23:21,927 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:23:21,928 INFO L514 BasicCegarLoop]: trace histogram [19, 12, 12, 12, 12, 12, 12, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:23:21,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-23 02:23:21,928 INFO L402 AbstractCegarLoop]: === Iteration 25 === 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)] === [2021-11-23 02:23:21,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:23:21,929 INFO L85 PathProgramCache]: Analyzing trace with hash 427430611, now seen corresponding path program 1 times [2021-11-23 02:23:21,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:23:21,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835429316] [2021-11-23 02:23:21,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:23:21,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms