./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc95xx.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e8ee6d6-4f13-42af-9f6b-a78a5dcd1228/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e8ee6d6-4f13-42af-9f6b-a78a5dcd1228/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_3e8ee6d6-4f13-42af-9f6b-a78a5dcd1228/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e8ee6d6-4f13-42af-9f6b-a78a5dcd1228/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc95xx.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e8ee6d6-4f13-42af-9f6b-a78a5dcd1228/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_3e8ee6d6-4f13-42af-9f6b-a78a5dcd1228/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 0a0fd6bb20819f4c1984e3b3e8e83ec7b86578d28f1c3e6d8ae5f0c954457512 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:18:24,311 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:18:24,314 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:18:24,375 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:18:24,376 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:18:24,380 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:18:24,383 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:18:24,387 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:18:24,391 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:18:24,397 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:18:24,398 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:18:24,400 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:18:24,401 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:18:24,404 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:18:24,406 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:18:24,411 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:18:24,413 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:18:24,415 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:18:24,417 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:18:24,426 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:18:24,428 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:18:24,430 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:18:24,434 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:18:24,435 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:18:24,445 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:18:24,446 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:18:24,446 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:18:24,448 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:18:24,449 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:18:24,451 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:18:24,452 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:18:24,453 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:18:24,455 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:18:24,457 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:18:24,459 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:18:24,459 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:18:24,460 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:18:24,460 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:18:24,461 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:18:24,462 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:18:24,463 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:18:24,464 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e8ee6d6-4f13-42af-9f6b-a78a5dcd1228/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 02:18:24,512 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:18:24,512 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:18:24,513 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:18:24,514 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:18:24,521 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:18:24,522 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:18:24,522 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:18:24,522 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:18:24,522 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:18:24,523 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:18:24,524 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:18:24,524 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:18:24,524 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:18:24,525 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:18:24,525 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:18:24,525 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:18:24,526 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:18:24,526 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:18:24,527 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:18:24,528 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:18:24,528 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:18:24,528 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:18:24,528 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:18:24,529 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:18:24,529 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:18:24,529 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:18:24,531 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:18:24,531 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:18:24,531 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:18:24,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:18:24,532 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:18:24,532 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:18:24,533 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:18:24,533 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:18:24,533 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:18:24,533 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:18:24,534 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:18:24,534 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:18:24,534 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_3e8ee6d6-4f13-42af-9f6b-a78a5dcd1228/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e8ee6d6-4f13-42af-9f6b-a78a5dcd1228/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0a0fd6bb20819f4c1984e3b3e8e83ec7b86578d28f1c3e6d8ae5f0c954457512 [2021-11-23 02:18:24,854 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:18:24,881 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:18:24,883 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:18:24,884 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:18:24,885 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:18:24,886 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e8ee6d6-4f13-42af-9f6b-a78a5dcd1228/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc95xx.cil.i [2021-11-23 02:18:24,963 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e8ee6d6-4f13-42af-9f6b-a78a5dcd1228/bin/utaipan-EQgc7hIp5V/data/0816883b3/64c484a6ceec477bab93f8689f3a6934/FLAG566bb3006 [2021-11-23 02:18:25,945 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:18:25,946 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e8ee6d6-4f13-42af-9f6b-a78a5dcd1228/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc95xx.cil.i [2021-11-23 02:18:26,012 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e8ee6d6-4f13-42af-9f6b-a78a5dcd1228/bin/utaipan-EQgc7hIp5V/data/0816883b3/64c484a6ceec477bab93f8689f3a6934/FLAG566bb3006 [2021-11-23 02:18:26,291 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e8ee6d6-4f13-42af-9f6b-a78a5dcd1228/bin/utaipan-EQgc7hIp5V/data/0816883b3/64c484a6ceec477bab93f8689f3a6934 [2021-11-23 02:18:26,294 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:18:26,295 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:18:26,297 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:18:26,298 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:18:26,301 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:18:26,302 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:18:26" (1/1) ... [2021-11-23 02:18:26,304 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a099f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:18:26, skipping insertion in model container [2021-11-23 02:18:26,304 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:18:26" (1/1) ... [2021-11-23 02:18:26,312 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:18:26,477 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:18:29,731 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_3e8ee6d6-4f13-42af-9f6b-a78a5dcd1228/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc95xx.cil.i[348095,348108] [2021-11-23 02:18:29,735 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_3e8ee6d6-4f13-42af-9f6b-a78a5dcd1228/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc95xx.cil.i[348264,348277] [2021-11-23 02:18:29,735 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_3e8ee6d6-4f13-42af-9f6b-a78a5dcd1228/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc95xx.cil.i[348431,348444] [2021-11-23 02:18:29,736 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_3e8ee6d6-4f13-42af-9f6b-a78a5dcd1228/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc95xx.cil.i[348599,348612] [2021-11-23 02:18:29,757 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:18:29,830 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:18:30,295 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_3e8ee6d6-4f13-42af-9f6b-a78a5dcd1228/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc95xx.cil.i[348095,348108] [2021-11-23 02:18:30,297 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_3e8ee6d6-4f13-42af-9f6b-a78a5dcd1228/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc95xx.cil.i[348264,348277] [2021-11-23 02:18:30,297 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_3e8ee6d6-4f13-42af-9f6b-a78a5dcd1228/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc95xx.cil.i[348431,348444] [2021-11-23 02:18:30,298 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_3e8ee6d6-4f13-42af-9f6b-a78a5dcd1228/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc95xx.cil.i[348599,348612] [2021-11-23 02:18:30,306 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:18:30,621 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:18:30,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:18:30 WrapperNode [2021-11-23 02:18:30,622 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:18:30,623 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:18:30,623 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:18:30,623 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:18:30,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:18:30" (1/1) ... [2021-11-23 02:18:30,782 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:18:30" (1/1) ... [2021-11-23 02:18:31,028 INFO L137 Inliner]: procedures = 391, calls = 2962, calls flagged for inlining = 179, calls inlined = 164, statements flattened = 6208 [2021-11-23 02:18:31,029 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:18:31,030 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:18:31,031 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:18:31,032 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:18:31,040 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:18:30" (1/1) ... [2021-11-23 02:18:31,041 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:18:30" (1/1) ... [2021-11-23 02:18:31,095 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:18:30" (1/1) ... [2021-11-23 02:18:31,097 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:18:30" (1/1) ... [2021-11-23 02:18:31,332 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:18:30" (1/1) ... [2021-11-23 02:18:31,368 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:18:30" (1/1) ... [2021-11-23 02:18:31,403 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:18:30" (1/1) ... [2021-11-23 02:18:31,443 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:18:31,445 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:18:31,445 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:18:31,445 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:18:31,446 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:18:30" (1/1) ... [2021-11-23 02:18:31,455 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:18:31,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e8ee6d6-4f13-42af-9f6b-a78a5dcd1228/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:18:31,485 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e8ee6d6-4f13-42af-9f6b-a78a5dcd1228/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:18:31,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e8ee6d6-4f13-42af-9f6b-a78a5dcd1228/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:18:31,544 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-23 02:18:31,544 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-23 02:18:31,544 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_nway_reset [2021-11-23 02:18:31,545 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_nway_reset [2021-11-23 02:18:31,545 INFO L130 BoogieDeclarations]: Found specification of procedure smsc95xx_link_reset [2021-11-23 02:18:31,545 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc95xx_link_reset [2021-11-23 02:18:31,545 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 02:18:31,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 02:18:31,546 INFO L130 BoogieDeclarations]: Found specification of procedure smsc_crc [2021-11-23 02:18:31,546 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc_crc [2021-11-23 02:18:31,546 INFO L130 BoogieDeclarations]: Found specification of procedure smsc95xx_ethtool_getregslen [2021-11-23 02:18:31,546 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc95xx_ethtool_getregslen [2021-11-23 02:18:31,546 INFO L130 BoogieDeclarations]: Found specification of procedure __smsc95xx_mdio_write [2021-11-23 02:18:31,546 INFO L138 BoogieDeclarations]: Found implementation of procedure __smsc95xx_mdio_write [2021-11-23 02:18:31,547 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-23 02:18:31,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-23 02:18:31,547 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_61 [2021-11-23 02:18:31,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_61 [2021-11-23 02:18:31,547 INFO L130 BoogieDeclarations]: Found specification of procedure smsc95xx_write_reg_nopm [2021-11-23 02:18:31,548 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc95xx_write_reg_nopm [2021-11-23 02:18:31,548 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_EMGentry_exit_smsc95xx_driver_exit_6_2 [2021-11-23 02:18:31,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_EMGentry_exit_smsc95xx_driver_exit_6_2 [2021-11-23 02:18:31,548 INFO L130 BoogieDeclarations]: Found specification of procedure smsc95xx_enable_phy_wakeup_interrupts [2021-11-23 02:18:31,548 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc95xx_enable_phy_wakeup_interrupts [2021-11-23 02:18:31,549 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-23 02:18:31,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-23 02:18:31,549 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_write_cmd_nopm [2021-11-23 02:18:31,549 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-23 02:18:31,549 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-23 02:18:31,549 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-23 02:18:31,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-23 02:18:31,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:18:31,550 INFO L130 BoogieDeclarations]: Found specification of procedure smsc95xx_write_reg [2021-11-23 02:18:31,551 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc95xx_write_reg [2021-11-23 02:18:31,551 INFO L130 BoogieDeclarations]: Found specification of procedure smsc95xx_rx_csum_offload [2021-11-23 02:18:31,551 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc95xx_rx_csum_offload [2021-11-23 02:18:31,551 INFO L130 BoogieDeclarations]: Found specification of procedure smsc95xx_read_reg_nopm [2021-11-23 02:18:31,551 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc95xx_read_reg_nopm [2021-11-23 02:18:31,551 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-23 02:18:31,552 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_resume [2021-11-23 02:18:31,552 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_resume [2021-11-23 02:18:31,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-23 02:18:31,553 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-23 02:18:31,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-23 02:18:31,554 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_tx_timeout [2021-11-23 02:18:31,555 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_tx_timeout [2021-11-23 02:18:31,555 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:18:31,555 INFO L130 BoogieDeclarations]: Found specification of procedure skb_headroom [2021-11-23 02:18:31,555 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_headroom [2021-11-23 02:18:31,555 INFO L130 BoogieDeclarations]: Found specification of procedure smsc95xx_mdio_write_nopm [2021-11-23 02:18:31,556 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc95xx_mdio_write_nopm [2021-11-23 02:18:31,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-23 02:18:31,556 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-23 02:18:31,556 INFO L130 BoogieDeclarations]: Found specification of procedure smsc95xx_ethtool_get_eeprom_len [2021-11-23 02:18:31,557 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc95xx_ethtool_get_eeprom_len [2021-11-23 02:18:31,557 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_write_cmd [2021-11-23 02:18:31,557 INFO L130 BoogieDeclarations]: Found specification of procedure skb_trim [2021-11-23 02:18:31,558 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_trim [2021-11-23 02:18:31,558 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_read_cmd_nopm [2021-11-23 02:18:31,558 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-23 02:18:31,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-23 02:18:31,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:18:31,559 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_1 [2021-11-23 02:18:31,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_1 [2021-11-23 02:18:31,559 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_0 [2021-11-23 02:18:31,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_0 [2021-11-23 02:18:31,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:18:31,560 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-23 02:18:31,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-23 02:18:31,560 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-23 02:18:31,560 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-23 02:18:31,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:18:31,561 INFO L130 BoogieDeclarations]: Found specification of procedure smsc95xx_start_rx_path [2021-11-23 02:18:31,562 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc95xx_start_rx_path [2021-11-23 02:18:31,562 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-23 02:18:31,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-23 02:18:31,562 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_open [2021-11-23 02:18:31,563 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_open [2021-11-23 02:18:31,563 INFO L130 BoogieDeclarations]: Found specification of procedure __smsc95xx_write_reg [2021-11-23 02:18:31,563 INFO L138 BoogieDeclarations]: Found implementation of procedure __smsc95xx_write_reg [2021-11-23 02:18:31,564 INFO L130 BoogieDeclarations]: Found specification of procedure smsc95xx_set_features [2021-11-23 02:18:31,564 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc95xx_set_features [2021-11-23 02:18:31,564 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_spin_lock [2021-11-23 02:18:31,565 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_spin_lock [2021-11-23 02:18:31,565 INFO L130 BoogieDeclarations]: Found specification of procedure smsc95xx_wait_eeprom [2021-11-23 02:18:31,565 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc95xx_wait_eeprom [2021-11-23 02:18:31,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:18:31,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:18:31,567 INFO L130 BoogieDeclarations]: Found specification of procedure __smsc95xx_read_reg [2021-11-23 02:18:31,567 INFO L138 BoogieDeclarations]: Found implementation of procedure __smsc95xx_read_reg [2021-11-23 02:18:31,567 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2021-11-23 02:18:31,567 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2021-11-23 02:18:31,568 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2021-11-23 02:18:31,568 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2021-11-23 02:18:31,568 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-23 02:18:31,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 02:18:31,568 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-23 02:18:31,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-23 02:18:31,569 INFO L130 BoogieDeclarations]: Found specification of procedure skb_push [2021-11-23 02:18:31,569 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_push [2021-11-23 02:18:31,569 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-23 02:18:31,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-23 02:18:31,570 INFO L130 BoogieDeclarations]: Found specification of procedure smsc95xx_reset [2021-11-23 02:18:31,570 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc95xx_reset [2021-11-23 02:18:31,571 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~u8~0~X~~u8~0~X~~u16~0~X~~u16~0~X~$Pointer$~X~~u16~0~TO~int [2021-11-23 02:18:31,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~u8~0~X~~u8~0~X~~u16~0~X~~u16~0~X~$Pointer$~X~~u16~0~TO~int [2021-11-23 02:18:31,576 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_stop [2021-11-23 02:18:31,576 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_stop [2021-11-23 02:18:31,576 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_mac_cr_lock_of_smsc95xx_priv [2021-11-23 02:18:31,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_mac_cr_lock_of_smsc95xx_priv [2021-11-23 02:18:31,577 INFO L130 BoogieDeclarations]: Found specification of procedure smsc95xx_read_reg [2021-11-23 02:18:31,578 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc95xx_read_reg [2021-11-23 02:18:31,578 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-23 02:18:31,578 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-23 02:18:31,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-23 02:18:31,585 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-23 02:18:31,585 INFO L130 BoogieDeclarations]: Found specification of procedure smsc95xx_mdio_write [2021-11-23 02:18:31,585 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc95xx_mdio_write [2021-11-23 02:18:31,586 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:18:31,586 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-11-23 02:18:31,586 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-11-23 02:18:31,586 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:18:31,586 INFO L130 BoogieDeclarations]: Found specification of procedure smsc95xx_enter_suspend1 [2021-11-23 02:18:31,586 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc95xx_enter_suspend1 [2021-11-23 02:18:31,587 INFO L130 BoogieDeclarations]: Found specification of procedure smsc95xx_enter_suspend2 [2021-11-23 02:18:31,587 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc95xx_enter_suspend2 [2021-11-23 02:18:31,587 INFO L130 BoogieDeclarations]: Found specification of procedure smsc95xx_read_eeprom [2021-11-23 02:18:31,587 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc95xx_read_eeprom [2021-11-23 02:18:31,587 INFO L130 BoogieDeclarations]: Found specification of procedure smsc95xx_set_multicast [2021-11-23 02:18:31,587 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc95xx_set_multicast [2021-11-23 02:18:31,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 02:18:31,588 INFO L130 BoogieDeclarations]: Found specification of procedure skb_checksum_start_offset [2021-11-23 02:18:31,588 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_checksum_start_offset [2021-11-23 02:18:31,588 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-23 02:18:31,588 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-23 02:18:31,588 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-11-23 02:18:31,589 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-11-23 02:18:31,589 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-23 02:18:31,589 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-23 02:18:31,589 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-23 02:18:31,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-23 02:18:31,589 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-23 02:18:31,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-23 02:18:31,590 INFO L130 BoogieDeclarations]: Found specification of procedure smsc95xx_mdio_read [2021-11-23 02:18:31,590 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc95xx_mdio_read [2021-11-23 02:18:31,590 INFO L130 BoogieDeclarations]: Found specification of procedure __smsc95xx_phy_wait_not_busy [2021-11-23 02:18:31,590 INFO L138 BoogieDeclarations]: Found implementation of procedure __smsc95xx_phy_wait_not_busy [2021-11-23 02:18:31,590 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_disconnect [2021-11-23 02:18:31,591 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_disconnect [2021-11-23 02:18:31,591 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_instance_release_2_4 [2021-11-23 02:18:31,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_instance_release_2_4 [2021-11-23 02:18:31,591 INFO L130 BoogieDeclarations]: Found specification of procedure smsc95xx_write_reg_async [2021-11-23 02:18:31,591 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc95xx_write_reg_async [2021-11-23 02:18:31,591 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-23 02:18:31,592 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-23 02:18:31,592 INFO L130 BoogieDeclarations]: Found specification of procedure smsc95xx_mdio_read_nopm [2021-11-23 02:18:31,592 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc95xx_mdio_read_nopm [2021-11-23 02:18:31,592 INFO L130 BoogieDeclarations]: Found specification of procedure smsc95xx_resume [2021-11-23 02:18:31,592 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc95xx_resume [2021-11-23 02:18:31,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:18:31,593 INFO L130 BoogieDeclarations]: Found specification of procedure skb_pull [2021-11-23 02:18:31,593 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_pull [2021-11-23 02:18:31,593 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-23 02:18:31,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-23 02:18:31,594 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_read_cmd [2021-11-23 02:18:31,594 INFO L130 BoogieDeclarations]: Found specification of procedure __smsc95xx_mdio_read [2021-11-23 02:18:31,594 INFO L138 BoogieDeclarations]: Found implementation of procedure __smsc95xx_mdio_read [2021-11-23 02:18:31,594 INFO L130 BoogieDeclarations]: Found specification of procedure smsc95xx_eeprom_confirm_not_busy [2021-11-23 02:18:31,594 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc95xx_eeprom_confirm_not_busy [2021-11-23 02:18:31,594 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-23 02:18:31,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-23 02:18:31,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:18:31,595 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-23 02:18:31,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-23 02:18:32,621 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:18:32,625 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:18:32,969 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-23 02:18:47,027 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-23 02:18:47,085 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:18:48,258 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:18:48,259 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 02:18:48,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:18:48 BoogieIcfgContainer [2021-11-23 02:18:48,265 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:18:48,267 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:18:48,268 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:18:48,271 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:18:48,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:18:26" (1/3) ... [2021-11-23 02:18:48,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41a2e9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:18:48, skipping insertion in model container [2021-11-23 02:18:48,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:18:30" (2/3) ... [2021-11-23 02:18:48,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41a2e9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:18:48, skipping insertion in model container [2021-11-23 02:18:48,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:18:48" (3/3) ... [2021-11-23 02:18:48,276 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc95xx.cil.i [2021-11-23 02:18:48,286 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:18:48,286 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-23 02:18:48,358 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:18:48,366 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 02:18:48,366 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-23 02:18:48,457 INFO L276 IsEmpty]: Start isEmpty. Operand has 1274 states, 809 states have (on average 1.3868974042027193) internal successors, (1122), 815 states have internal predecessors, (1122), 386 states have call successors, (386), 77 states have call predecessors, (386), 76 states have return successors, (379), 379 states have call predecessors, (379), 379 states have call successors, (379) [2021-11-23 02:18:48,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-11-23 02:18:48,483 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:18:48,484 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:18:48,485 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:18:48,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:18:48,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1915395822, now seen corresponding path program 1 times [2021-11-23 02:18:48,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:18:48,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282490736] [2021-11-23 02:18:48,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:18:48,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:18:49,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:18:49,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1263 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1263 trivial. 0 not checked. [2021-11-23 02:18:49,483 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:18:49,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282490736] [2021-11-23 02:18:49,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282490736] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:18:49,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:18:49,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:18:49,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371716972] [2021-11-23 02:18:49,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:18:49,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:18:49,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:18:49,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:18:49,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:18:49,532 INFO L87 Difference]: Start difference. First operand has 1274 states, 809 states have (on average 1.3868974042027193) internal successors, (1122), 815 states have internal predecessors, (1122), 386 states have call successors, (386), 77 states have call predecessors, (386), 76 states have return successors, (379), 379 states have call predecessors, (379), 379 states have call successors, (379) Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-23 02:18:51,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:18:51,871 INFO L93 Difference]: Finished difference Result 3667 states and 5494 transitions. [2021-11-23 02:18:51,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:18:51,889 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 205 [2021-11-23 02:18:51,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:18:52,004 INFO L225 Difference]: With dead ends: 3667 [2021-11-23 02:18:52,004 INFO L226 Difference]: Without dead ends: 2419 [2021-11-23 02:18:52,040 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 02:18:52,050 INFO L933 BasicCegarLoop]: 1941 mSDtfsCounter, 1738 mSDsluCounter, 1829 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1738 SdHoareTripleChecker+Valid, 3513 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:18:52,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1738 Valid, 3513 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-23 02:18:52,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2419 states. [2021-11-23 02:18:52,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2419 to 2415. [2021-11-23 02:18:52,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2415 states, 1558 states have (on average 1.3844672657252888) internal successors, (2157), 1569 states have internal predecessors, (2157), 706 states have call successors, (706), 149 states have call predecessors, (706), 148 states have return successors, (702), 702 states have call predecessors, (702), 702 states have call successors, (702) [2021-11-23 02:18:52,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2415 states to 2415 states and 3565 transitions. [2021-11-23 02:18:52,350 INFO L78 Accepts]: Start accepts. Automaton has 2415 states and 3565 transitions. Word has length 205 [2021-11-23 02:18:52,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:18:52,352 INFO L470 AbstractCegarLoop]: Abstraction has 2415 states and 3565 transitions. [2021-11-23 02:18:52,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-23 02:18:52,352 INFO L276 IsEmpty]: Start isEmpty. Operand 2415 states and 3565 transitions. [2021-11-23 02:18:52,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-11-23 02:18:52,362 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:18:52,363 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:18:52,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:18:52,364 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:18:52,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:18:52,365 INFO L85 PathProgramCache]: Analyzing trace with hash -287397039, now seen corresponding path program 1 times [2021-11-23 02:18:52,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:18:52,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264937543] [2021-11-23 02:18:52,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:18:52,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:18:52,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:18:52,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2021-11-23 02:18:52,672 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:18:52,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264937543] [2021-11-23 02:18:52,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264937543] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:18:52,673 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:18:52,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:18:52,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575130374] [2021-11-23 02:18:52,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:18:52,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:18:52,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:18:52,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:18:52,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:18:52,678 INFO L87 Difference]: Start difference. First operand 2415 states and 3565 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-23 02:18:54,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:18:54,991 INFO L93 Difference]: Finished difference Result 5752 states and 8436 transitions. [2021-11-23 02:18:54,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:18:54,992 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 217 [2021-11-23 02:18:54,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:18:55,027 INFO L225 Difference]: With dead ends: 5752 [2021-11-23 02:18:55,027 INFO L226 Difference]: Without dead ends: 3374 [2021-11-23 02:18:55,044 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 02:18:55,046 INFO L933 BasicCegarLoop]: 1968 mSDtfsCounter, 1564 mSDsluCounter, 1782 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1564 SdHoareTripleChecker+Valid, 3518 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:18:55,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1564 Valid, 3518 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-23 02:18:55,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3374 states. [2021-11-23 02:18:55,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3374 to 3347. [2021-11-23 02:18:55,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3347 states, 2138 states have (on average 1.3634237605238542) internal successors, (2915), 2157 states have internal predecessors, (2915), 985 states have call successors, (985), 222 states have call predecessors, (985), 221 states have return successors, (981), 976 states have call predecessors, (981), 981 states have call successors, (981) [2021-11-23 02:18:55,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3347 states to 3347 states and 4881 transitions. [2021-11-23 02:18:55,264 INFO L78 Accepts]: Start accepts. Automaton has 3347 states and 4881 transitions. Word has length 217 [2021-11-23 02:18:55,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:18:55,265 INFO L470 AbstractCegarLoop]: Abstraction has 3347 states and 4881 transitions. [2021-11-23 02:18:55,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-23 02:18:55,266 INFO L276 IsEmpty]: Start isEmpty. Operand 3347 states and 4881 transitions. [2021-11-23 02:18:55,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-11-23 02:18:55,274 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:18:55,274 INFO L514 BasicCegarLoop]: trace histogram [22, 18, 18, 18, 18, 18, 18, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:18:55,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:18:55,275 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:18:55,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:18:55,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1387380606, now seen corresponding path program 1 times [2021-11-23 02:18:55,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:18:55,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962598860] [2021-11-23 02:18:55,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:18:55,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:18:55,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:18:55,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1415 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1415 trivial. 0 not checked. [2021-11-23 02:18:55,710 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:18:55,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962598860] [2021-11-23 02:18:55,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962598860] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:18:55,711 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:18:55,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:18:55,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197856371] [2021-11-23 02:18:55,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:18:55,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:18:55,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:18:55,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:18:55,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:18:55,714 INFO L87 Difference]: Start difference. First operand 3347 states and 4881 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-23 02:18:58,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:18:58,287 INFO L93 Difference]: Finished difference Result 3353 states and 4886 transitions. [2021-11-23 02:18:58,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:18:58,288 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 249 [2021-11-23 02:18:58,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:18:58,323 INFO L225 Difference]: With dead ends: 3353 [2021-11-23 02:18:58,324 INFO L226 Difference]: Without dead ends: 3351 [2021-11-23 02:18:58,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:18:58,336 INFO L933 BasicCegarLoop]: 1587 mSDtfsCounter, 1791 mSDsluCounter, 3699 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1802 SdHoareTripleChecker+Valid, 4748 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:18:58,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1802 Valid, 4748 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-23 02:18:58,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3351 states. [2021-11-23 02:18:58,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3351 to 3351. [2021-11-23 02:18:58,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3351 states, 2141 states have (on average 1.3629145259224662) internal successors, (2918), 2160 states have internal predecessors, (2918), 985 states have call successors, (985), 223 states have call predecessors, (985), 222 states have return successors, (981), 976 states have call predecessors, (981), 981 states have call successors, (981) [2021-11-23 02:18:58,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3351 states to 3351 states and 4884 transitions. [2021-11-23 02:18:58,615 INFO L78 Accepts]: Start accepts. Automaton has 3351 states and 4884 transitions. Word has length 249 [2021-11-23 02:18:58,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:18:58,620 INFO L470 AbstractCegarLoop]: Abstraction has 3351 states and 4884 transitions. [2021-11-23 02:18:58,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-23 02:18:58,621 INFO L276 IsEmpty]: Start isEmpty. Operand 3351 states and 4884 transitions. [2021-11-23 02:18:58,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-11-23 02:18:58,632 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:18:58,632 INFO L514 BasicCegarLoop]: trace histogram [22, 18, 18, 18, 18, 18, 18, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:18:58,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:18:58,633 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:18:58,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:18:58,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1224568449, now seen corresponding path program 1 times [2021-11-23 02:18:58,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:18:58,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786630934] [2021-11-23 02:18:58,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:18:58,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:18:58,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:18:59,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1417 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1415 trivial. 0 not checked. [2021-11-23 02:18:59,086 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:18:59,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786630934] [2021-11-23 02:18:59,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786630934] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:18:59,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:18:59,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:18:59,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818941741] [2021-11-23 02:18:59,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:18:59,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:18:59,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:18:59,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:18:59,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:18:59,090 INFO L87 Difference]: Start difference. First operand 3351 states and 4884 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-23 02:19:01,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:19:01,318 INFO L93 Difference]: Finished difference Result 3357 states and 4889 transitions. [2021-11-23 02:19:01,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:19:01,319 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 254 [2021-11-23 02:19:01,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:19:01,352 INFO L225 Difference]: With dead ends: 3357 [2021-11-23 02:19:01,352 INFO L226 Difference]: Without dead ends: 3355 [2021-11-23 02:19:01,355 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 02:19:01,358 INFO L933 BasicCegarLoop]: 1590 mSDtfsCounter, 1786 mSDsluCounter, 3699 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1796 SdHoareTripleChecker+Valid, 4751 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:19:01,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1796 Valid, 4751 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-23 02:19:01,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3355 states. [2021-11-23 02:19:01,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3355 to 3355. [2021-11-23 02:19:01,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3355 states, 2144 states have (on average 1.3624067164179106) internal successors, (2921), 2163 states have internal predecessors, (2921), 985 states have call successors, (985), 224 states have call predecessors, (985), 223 states have return successors, (981), 976 states have call predecessors, (981), 981 states have call successors, (981) [2021-11-23 02:19:01,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3355 states to 3355 states and 4887 transitions. [2021-11-23 02:19:01,645 INFO L78 Accepts]: Start accepts. Automaton has 3355 states and 4887 transitions. Word has length 254 [2021-11-23 02:19:01,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:19:01,647 INFO L470 AbstractCegarLoop]: Abstraction has 3355 states and 4887 transitions. [2021-11-23 02:19:01,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-23 02:19:01,648 INFO L276 IsEmpty]: Start isEmpty. Operand 3355 states and 4887 transitions. [2021-11-23 02:19:01,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-11-23 02:19:01,658 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:19:01,658 INFO L514 BasicCegarLoop]: trace histogram [22, 18, 18, 18, 18, 18, 18, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:19:01,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:19:01,659 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 02:19:01,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:19:01,661 INFO L85 PathProgramCache]: Analyzing trace with hash -896755335, now seen corresponding path program 1 times [2021-11-23 02:19:01,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:19:01,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812468582] [2021-11-23 02:19:01,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:19:01,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:19:01,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:19:02,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1417 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1413 trivial. 0 not checked. [2021-11-23 02:19:02,039 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:19:02,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812468582] [2021-11-23 02:19:02,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812468582] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:19:02,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:19:02,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:19:02,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041755034] [2021-11-23 02:19:02,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:19:02,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:19:02,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:19:02,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:19:02,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:19:02,043 INFO L87 Difference]: Start difference. First operand 3355 states and 4887 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-23 02:19:04,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:19:04,613 INFO L93 Difference]: Finished difference Result 3361 states and 4892 transitions. [2021-11-23 02:19:04,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:19:04,614 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 257 [2021-11-23 02:19:04,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:19:04,643 INFO L225 Difference]: With dead ends: 3361 [2021-11-23 02:19:04,643 INFO L226 Difference]: Without dead ends: 3359 [2021-11-23 02:19:04,646 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 02:19:04,647 INFO L933 BasicCegarLoop]: 1590 mSDtfsCounter, 1787 mSDsluCounter, 3699 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1796 SdHoareTripleChecker+Valid, 4751 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:19:04,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1796 Valid, 4751 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-23 02:19:04,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3359 states. [2021-11-23 02:19:04,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3359 to 3359. [2021-11-23 02:19:04,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3359 states, 2147 states have (on average 1.3619003260363298) internal successors, (2924), 2166 states have internal predecessors, (2924), 985 states have call successors, (985), 225 states have call predecessors, (985), 224 states have return successors, (981), 976 states have call predecessors, (981), 981 states have call successors, (981) [2021-11-23 02:19:04,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3359 states to 3359 states and 4890 transitions. [2021-11-23 02:19:04,896 INFO L78 Accepts]: Start accepts. Automaton has 3359 states and 4890 transitions. Word has length 257 [2021-11-23 02:19:04,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:19:04,899 INFO L470 AbstractCegarLoop]: Abstraction has 3359 states and 4890 transitions. [2021-11-23 02:19:04,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-23 02:19:04,901 INFO L276 IsEmpty]: Start isEmpty. Operand 3359 states and 4890 transitions. [2021-11-23 02:19:04,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-11-23 02:19:04,912 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:19:04,913 INFO L514 BasicCegarLoop]: trace histogram [22, 18, 18, 18, 18, 18, 18, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:19:04,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:19:04,913 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 02:19:04,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:19:04,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1050340639, now seen corresponding path program 1 times [2021-11-23 02:19:04,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:19:04,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112461537] [2021-11-23 02:19:04,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:19:04,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:19:05,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:19:05,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1433 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1427 trivial. 0 not checked. [2021-11-23 02:19:05,312 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:19:05,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112461537] [2021-11-23 02:19:05,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112461537] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:19:05,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:19:05,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:19:05,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852179358] [2021-11-23 02:19:05,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:19:05,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:19:05,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:19:05,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:19:05,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:19:05,316 INFO L87 Difference]: Start difference. First operand 3359 states and 4890 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-23 02:19:07,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:19:07,497 INFO L93 Difference]: Finished difference Result 3365 states and 4895 transitions. [2021-11-23 02:19:07,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:19:07,498 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 264 [2021-11-23 02:19:07,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:19:07,529 INFO L225 Difference]: With dead ends: 3365 [2021-11-23 02:19:07,529 INFO L226 Difference]: Without dead ends: 3363 [2021-11-23 02:19:07,532 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 02:19:07,534 INFO L933 BasicCegarLoop]: 1590 mSDtfsCounter, 1786 mSDsluCounter, 3699 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1794 SdHoareTripleChecker+Valid, 4751 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:19:07,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1794 Valid, 4751 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-23 02:19:07,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3363 states. [2021-11-23 02:19:07,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3363 to 3363. [2021-11-23 02:19:07,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3363 states, 2150 states have (on average 1.3613953488372093) internal successors, (2927), 2169 states have internal predecessors, (2927), 985 states have call successors, (985), 226 states have call predecessors, (985), 225 states have return successors, (981), 976 states have call predecessors, (981), 981 states have call successors, (981) [2021-11-23 02:19:07,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3363 states to 3363 states and 4893 transitions. [2021-11-23 02:19:07,755 INFO L78 Accepts]: Start accepts. Automaton has 3363 states and 4893 transitions. Word has length 264 [2021-11-23 02:19:07,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:19:07,757 INFO L470 AbstractCegarLoop]: Abstraction has 3363 states and 4893 transitions. [2021-11-23 02:19:07,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-23 02:19:07,757 INFO L276 IsEmpty]: Start isEmpty. Operand 3363 states and 4893 transitions. [2021-11-23 02:19:07,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2021-11-23 02:19:07,771 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:19:07,772 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 8, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:19:07,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 02:19:07,772 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:19:07,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:19:07,773 INFO L85 PathProgramCache]: Analyzing trace with hash -34092734, now seen corresponding path program 1 times [2021-11-23 02:19:07,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:19:07,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589868974] [2021-11-23 02:19:07,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:19:07,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:19:07,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:19:08,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2021-11-23 02:19:08,124 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:19:08,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589868974] [2021-11-23 02:19:08,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589868974] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:19:08,125 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:19:08,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:19:08,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760127570] [2021-11-23 02:19:08,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:19:08,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:19:08,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:19:08,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:19:08,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:19:08,128 INFO L87 Difference]: Start difference. First operand 3363 states and 4893 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-23 02:19:10,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:19:10,251 INFO L93 Difference]: Finished difference Result 8956 states and 13024 transitions. [2021-11-23 02:19:10,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:19:10,251 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) Word has length 357 [2021-11-23 02:19:10,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:19:10,319 INFO L225 Difference]: With dead ends: 8956 [2021-11-23 02:19:10,319 INFO L226 Difference]: Without dead ends: 5630 [2021-11-23 02:19:10,339 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 02:19:10,341 INFO L933 BasicCegarLoop]: 1879 mSDtfsCounter, 1279 mSDsluCounter, 1821 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1279 SdHoareTripleChecker+Valid, 3444 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:19:10,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1279 Valid, 3444 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-23 02:19:10,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5630 states. [2021-11-23 02:19:10,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5630 to 5583. [2021-11-23 02:19:10,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5583 states, 3592 states have (on average 1.361358574610245) internal successors, (4890), 3631 states have internal predecessors, (4890), 1608 states have call successors, (1608), 381 states have call predecessors, (1608), 380 states have return successors, (1604), 1585 states have call predecessors, (1604), 1604 states have call successors, (1604) [2021-11-23 02:19:10,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5583 states to 5583 states and 8102 transitions. [2021-11-23 02:19:10,721 INFO L78 Accepts]: Start accepts. Automaton has 5583 states and 8102 transitions. Word has length 357 [2021-11-23 02:19:10,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:19:10,722 INFO L470 AbstractCegarLoop]: Abstraction has 5583 states and 8102 transitions. [2021-11-23 02:19:10,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-23 02:19:10,723 INFO L276 IsEmpty]: Start isEmpty. Operand 5583 states and 8102 transitions. [2021-11-23 02:19:10,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2021-11-23 02:19:10,737 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:19:10,737 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 8, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:19:10,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 02:19:10,738 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:19:10,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:19:10,739 INFO L85 PathProgramCache]: Analyzing trace with hash -138235412, now seen corresponding path program 1 times [2021-11-23 02:19:10,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:19:10,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152079322] [2021-11-23 02:19:10,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:19:10,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:19:10,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:19:11,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2021-11-23 02:19:11,026 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:19:11,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152079322] [2021-11-23 02:19:11,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152079322] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:19:11,027 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:19:11,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:19:11,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284365201] [2021-11-23 02:19:11,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:19:11,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:19:11,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:19:11,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:19:11,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:19:11,030 INFO L87 Difference]: Start difference. First operand 5583 states and 8102 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-23 02:19:13,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:19:13,168 INFO L93 Difference]: Finished difference Result 12725 states and 18458 transitions. [2021-11-23 02:19:13,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:19:13,169 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) Word has length 351 [2021-11-23 02:19:13,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:19:13,221 INFO L225 Difference]: With dead ends: 12725 [2021-11-23 02:19:13,221 INFO L226 Difference]: Without dead ends: 7179 [2021-11-23 02:19:13,252 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 02:19:13,253 INFO L933 BasicCegarLoop]: 1957 mSDtfsCounter, 1534 mSDsluCounter, 1822 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1534 SdHoareTripleChecker+Valid, 3529 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:19:13,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1534 Valid, 3529 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-23 02:19:13,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7179 states. [2021-11-23 02:19:13,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7179 to 7130. [2021-11-23 02:19:13,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7130 states, 4586 states have (on average 1.3610989969472307) internal successors, (6242), 4651 states have internal predecessors, (6242), 2045 states have call successors, (2045), 497 states have call predecessors, (2045), 496 states have return successors, (2041), 1994 states have call predecessors, (2041), 2041 states have call successors, (2041) [2021-11-23 02:19:13,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7130 states to 7130 states and 10328 transitions. [2021-11-23 02:19:13,691 INFO L78 Accepts]: Start accepts. Automaton has 7130 states and 10328 transitions. Word has length 351 [2021-11-23 02:19:13,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:19:13,691 INFO L470 AbstractCegarLoop]: Abstraction has 7130 states and 10328 transitions. [2021-11-23 02:19:13,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-23 02:19:13,692 INFO L276 IsEmpty]: Start isEmpty. Operand 7130 states and 10328 transitions. [2021-11-23 02:19:13,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-11-23 02:19:13,701 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:19:13,701 INFO L514 BasicCegarLoop]: trace histogram [22, 18, 18, 18, 18, 18, 18, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:19:13,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 02:19:13,702 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 02:19:13,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:19:13,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1322092226, now seen corresponding path program 1 times [2021-11-23 02:19:13,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:19:13,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063933506] [2021-11-23 02:19:13,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:19:13,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:19:13,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:19:14,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1447 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1439 trivial. 0 not checked. [2021-11-23 02:19:14,036 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:19:14,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063933506] [2021-11-23 02:19:14,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063933506] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:19:14,037 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:19:14,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:19:14,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073223848] [2021-11-23 02:19:14,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:19:14,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:19:14,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:19:14,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:19:14,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:19:14,040 INFO L87 Difference]: Start difference. First operand 7130 states and 10328 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-23 02:19:16,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:19:16,340 INFO L93 Difference]: Finished difference Result 7136 states and 10333 transitions. [2021-11-23 02:19:16,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:19:16,341 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 269 [2021-11-23 02:19:16,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:19:16,378 INFO L225 Difference]: With dead ends: 7136 [2021-11-23 02:19:16,378 INFO L226 Difference]: Without dead ends: 7134 [2021-11-23 02:19:16,383 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 02:19:16,384 INFO L933 BasicCegarLoop]: 1590 mSDtfsCounter, 1786 mSDsluCounter, 3699 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1793 SdHoareTripleChecker+Valid, 4751 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:19:16,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1793 Valid, 4751 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-23 02:19:16,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7134 states. [2021-11-23 02:19:16,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7134 to 7134. [2021-11-23 02:19:16,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7134 states, 4589 states have (on average 1.3608629331008935) internal successors, (6245), 4654 states have internal predecessors, (6245), 2045 states have call successors, (2045), 498 states have call predecessors, (2045), 497 states have return successors, (2041), 1994 states have call predecessors, (2041), 2041 states have call successors, (2041) [2021-11-23 02:19:16,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7134 states to 7134 states and 10331 transitions. [2021-11-23 02:19:16,928 INFO L78 Accepts]: Start accepts. Automaton has 7134 states and 10331 transitions. Word has length 269 [2021-11-23 02:19:16,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:19:16,929 INFO L470 AbstractCegarLoop]: Abstraction has 7134 states and 10331 transitions. [2021-11-23 02:19:16,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-23 02:19:16,930 INFO L276 IsEmpty]: Start isEmpty. Operand 7134 states and 10331 transitions. [2021-11-23 02:19:16,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2021-11-23 02:19:16,939 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:19:16,939 INFO L514 BasicCegarLoop]: trace histogram [22, 18, 18, 18, 18, 18, 18, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:19:16,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 02:19:16,940 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 02:19:16,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:19:16,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1206279615, now seen corresponding path program 1 times [2021-11-23 02:19:16,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:19:16,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488518311] [2021-11-23 02:19:16,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:19:16,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:19:17,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:19:17,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1464 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1454 trivial. 0 not checked. [2021-11-23 02:19:17,212 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:19:17,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488518311] [2021-11-23 02:19:17,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488518311] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:19:17,213 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:19:17,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:19:17,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383375046] [2021-11-23 02:19:17,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:19:17,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:19:17,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:19:17,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:19:17,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:19:17,215 INFO L87 Difference]: Start difference. First operand 7134 states and 10331 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (36), 3 states have call predecessors, (36), 1 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-23 02:19:19,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:19:19,631 INFO L93 Difference]: Finished difference Result 7140 states and 10336 transitions. [2021-11-23 02:19:19,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:19:19,632 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (36), 3 states have call predecessors, (36), 1 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) Word has length 273 [2021-11-23 02:19:19,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:19:19,667 INFO L225 Difference]: With dead ends: 7140 [2021-11-23 02:19:19,667 INFO L226 Difference]: Without dead ends: 7138 [2021-11-23 02:19:19,672 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 02:19:19,673 INFO L933 BasicCegarLoop]: 1590 mSDtfsCounter, 1786 mSDsluCounter, 3699 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1792 SdHoareTripleChecker+Valid, 4751 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:19:19,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1792 Valid, 4751 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-23 02:19:19,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7138 states. [2021-11-23 02:19:20,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7138 to 7138. [2021-11-23 02:19:20,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7138 states, 4592 states have (on average 1.3606271777003485) internal successors, (6248), 4657 states have internal predecessors, (6248), 2045 states have call successors, (2045), 499 states have call predecessors, (2045), 498 states have return successors, (2041), 1994 states have call predecessors, (2041), 2041 states have call successors, (2041) [2021-11-23 02:19:20,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7138 states to 7138 states and 10334 transitions. [2021-11-23 02:19:20,178 INFO L78 Accepts]: Start accepts. Automaton has 7138 states and 10334 transitions. Word has length 273 [2021-11-23 02:19:20,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:19:20,179 INFO L470 AbstractCegarLoop]: Abstraction has 7138 states and 10334 transitions. [2021-11-23 02:19:20,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (36), 3 states have call predecessors, (36), 1 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-23 02:19:20,180 INFO L276 IsEmpty]: Start isEmpty. Operand 7138 states and 10334 transitions. [2021-11-23 02:19:20,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-11-23 02:19:20,189 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:19:20,190 INFO L514 BasicCegarLoop]: trace histogram [22, 18, 18, 18, 18, 18, 18, 7, 6, 6, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:19:20,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 02:19:20,190 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:19:20,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:19:20,191 INFO L85 PathProgramCache]: Analyzing trace with hash 900928994, now seen corresponding path program 1 times [2021-11-23 02:19:20,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:19:20,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277603684] [2021-11-23 02:19:20,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:19:20,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:19:20,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:19:20,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1487 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 1475 trivial. 0 not checked. [2021-11-23 02:19:20,475 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:19:20,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277603684] [2021-11-23 02:19:20,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277603684] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:19:20,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:19:20,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:19:20,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505456058] [2021-11-23 02:19:20,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:19:20,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:19:20,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:19:20,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:19:20,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:19:20,479 INFO L87 Difference]: Start difference. First operand 7138 states and 10334 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-23 02:19:22,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:19:22,804 INFO L93 Difference]: Finished difference Result 7144 states and 10339 transitions. [2021-11-23 02:19:22,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:19:22,804 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 279 [2021-11-23 02:19:22,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:19:22,841 INFO L225 Difference]: With dead ends: 7144 [2021-11-23 02:19:22,842 INFO L226 Difference]: Without dead ends: 7142 [2021-11-23 02:19:22,847 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 02:19:22,848 INFO L933 BasicCegarLoop]: 1590 mSDtfsCounter, 1786 mSDsluCounter, 3699 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1791 SdHoareTripleChecker+Valid, 4751 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:19:22,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1791 Valid, 4751 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-23 02:19:22,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7142 states. [2021-11-23 02:19:23,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7142 to 7142. [2021-11-23 02:19:23,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7142 states, 4595 states have (on average 1.360391730141458) internal successors, (6251), 4660 states have internal predecessors, (6251), 2045 states have call successors, (2045), 500 states have call predecessors, (2045), 499 states have return successors, (2041), 1994 states have call predecessors, (2041), 2041 states have call successors, (2041) [2021-11-23 02:19:23,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7142 states to 7142 states and 10337 transitions. [2021-11-23 02:19:23,476 INFO L78 Accepts]: Start accepts. Automaton has 7142 states and 10337 transitions. Word has length 279 [2021-11-23 02:19:23,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:19:23,477 INFO L470 AbstractCegarLoop]: Abstraction has 7142 states and 10337 transitions. [2021-11-23 02:19:23,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-23 02:19:23,477 INFO L276 IsEmpty]: Start isEmpty. Operand 7142 states and 10337 transitions. [2021-11-23 02:19:23,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2021-11-23 02:19:23,488 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:19:23,488 INFO L514 BasicCegarLoop]: trace histogram [22, 18, 18, 18, 18, 18, 18, 8, 7, 7, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:19:23,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 02:19:23,489 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 02:19:23,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:19:23,490 INFO L85 PathProgramCache]: Analyzing trace with hash 2077590433, now seen corresponding path program 1 times [2021-11-23 02:19:23,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:19:23,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581926179] [2021-11-23 02:19:23,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:19:23,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:19:23,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:19:23,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1499 trivial. 0 not checked. [2021-11-23 02:19:23,767 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:19:23,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581926179] [2021-11-23 02:19:23,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581926179] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:19:23,767 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:19:23,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:19:23,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906112667] [2021-11-23 02:19:23,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:19:23,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:19:23,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:19:23,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:19:23,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:19:23,770 INFO L87 Difference]: Start difference. First operand 7142 states and 10337 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-23 02:19:26,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:19:26,112 INFO L93 Difference]: Finished difference Result 7188 states and 10366 transitions. [2021-11-23 02:19:26,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:19:26,113 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 284 [2021-11-23 02:19:26,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:19:26,150 INFO L225 Difference]: With dead ends: 7188 [2021-11-23 02:19:26,150 INFO L226 Difference]: Without dead ends: 7186 [2021-11-23 02:19:26,156 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 02:19:26,157 INFO L933 BasicCegarLoop]: 1590 mSDtfsCounter, 1722 mSDsluCounter, 3764 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1726 SdHoareTripleChecker+Valid, 4807 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:19:26,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1726 Valid, 4807 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 836 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-23 02:19:26,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7186 states. [2021-11-23 02:19:26,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7186 to 7186. [2021-11-23 02:19:26,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7186 states, 4622 states have (on average 1.3582864560796193) internal successors, (6278), 4687 states have internal predecessors, (6278), 2045 states have call successors, (2045), 517 states have call predecessors, (2045), 516 states have return successors, (2041), 1994 states have call predecessors, (2041), 2041 states have call successors, (2041) [2021-11-23 02:19:26,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7186 states to 7186 states and 10364 transitions. [2021-11-23 02:19:26,663 INFO L78 Accepts]: Start accepts. Automaton has 7186 states and 10364 transitions. Word has length 284 [2021-11-23 02:19:26,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:19:26,664 INFO L470 AbstractCegarLoop]: Abstraction has 7186 states and 10364 transitions. [2021-11-23 02:19:26,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-23 02:19:26,665 INFO L276 IsEmpty]: Start isEmpty. Operand 7186 states and 10364 transitions. [2021-11-23 02:19:26,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2021-11-23 02:19:26,676 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:19:26,677 INFO L514 BasicCegarLoop]: trace histogram [23, 18, 18, 18, 18, 18, 18, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:19:26,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 02:19:26,678 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:19:26,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:19:26,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1638815705, now seen corresponding path program 1 times [2021-11-23 02:19:26,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:19:26,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093357606] [2021-11-23 02:19:26,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:19:26,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:19:26,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:19:26,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1450 trivial. 0 not checked. [2021-11-23 02:19:26,917 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:19:26,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093357606] [2021-11-23 02:19:26,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093357606] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:19:26,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:19:26,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:19:26,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828582687] [2021-11-23 02:19:26,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:19:26,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:19:26,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:19:26,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:19:26,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:19:26,920 INFO L87 Difference]: Start difference. First operand 7186 states and 10364 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2021-11-23 02:19:29,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:19:29,527 INFO L93 Difference]: Finished difference Result 16390 states and 23671 transitions. [2021-11-23 02:19:29,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:19:29,528 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) Word has length 277 [2021-11-23 02:19:29,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:19:29,572 INFO L225 Difference]: With dead ends: 16390 [2021-11-23 02:19:29,572 INFO L226 Difference]: Without dead ends: 10092 [2021-11-23 02:19:29,601 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 02:19:29,602 INFO L933 BasicCegarLoop]: 2955 mSDtfsCounter, 1618 mSDsluCounter, 1780 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1618 SdHoareTripleChecker+Valid, 4503 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:19:29,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1618 Valid, 4503 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-23 02:19:29,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10092 states. [2021-11-23 02:19:30,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10092 to 10027. [2021-11-23 02:19:30,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10027 states, 6463 states have (on average 1.3631440507504256) internal successors, (8810), 6562 states have internal predecessors, (8810), 2842 states have call successors, (2842), 720 states have call predecessors, (2842), 719 states have return successors, (2838), 2763 states have call predecessors, (2838), 2838 states have call successors, (2838) [2021-11-23 02:19:30,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10027 states to 10027 states and 14490 transitions. [2021-11-23 02:19:30,259 INFO L78 Accepts]: Start accepts. Automaton has 10027 states and 14490 transitions. Word has length 277 [2021-11-23 02:19:30,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:19:30,260 INFO L470 AbstractCegarLoop]: Abstraction has 10027 states and 14490 transitions. [2021-11-23 02:19:30,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2021-11-23 02:19:30,261 INFO L276 IsEmpty]: Start isEmpty. Operand 10027 states and 14490 transitions. [2021-11-23 02:19:30,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-11-23 02:19:30,273 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:19:30,273 INFO L514 BasicCegarLoop]: trace histogram [20, 18, 18, 18, 18, 18, 18, 8, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:19:30,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 02:19:30,274 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:19:30,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:19:30,275 INFO L85 PathProgramCache]: Analyzing trace with hash 575121045, now seen corresponding path program 1 times [2021-11-23 02:19:30,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:19:30,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856542505] [2021-11-23 02:19:30,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:19:30,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:19:30,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:19:30,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1468 trivial. 0 not checked. [2021-11-23 02:19:30,564 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:19:30,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856542505] [2021-11-23 02:19:30,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856542505] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:19:30,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:19:30,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:19:30,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075626731] [2021-11-23 02:19:30,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:19:30,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:19:30,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:19:30,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:19:30,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:19:30,567 INFO L87 Difference]: Start difference. First operand 10027 states and 14490 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 3 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (39), 3 states have call predecessors, (39), 3 states have call successors, (39) [2021-11-23 02:19:36,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:19:36,834 INFO L93 Difference]: Finished difference Result 31269 states and 45184 transitions. [2021-11-23 02:19:36,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:19:36,835 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 3 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (39), 3 states have call predecessors, (39), 3 states have call successors, (39) Word has length 374 [2021-11-23 02:19:36,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:19:36,931 INFO L225 Difference]: With dead ends: 31269 [2021-11-23 02:19:36,932 INFO L226 Difference]: Without dead ends: 21279 [2021-11-23 02:19:36,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:19:36,980 INFO L933 BasicCegarLoop]: 3454 mSDtfsCounter, 3317 mSDsluCounter, 4562 mSDsCounter, 0 mSdLazyCounter, 2756 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3406 SdHoareTripleChecker+Valid, 7185 SdHoareTripleChecker+Invalid, 2861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 2756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:19:36,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3406 Valid, 7185 Invalid, 2861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 2756 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2021-11-23 02:19:37,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21279 states. [2021-11-23 02:19:38,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21279 to 21111. [2021-11-23 02:19:38,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21111 states, 13661 states have (on average 1.3682746504648269) internal successors, (18692), 13895 states have internal predecessors, (18692), 5930 states have call successors, (5930), 1536 states have call predecessors, (5930), 1517 states have return successors, (5926), 5721 states have call predecessors, (5926), 5926 states have call successors, (5926) [2021-11-23 02:19:38,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21111 states to 21111 states and 30548 transitions. [2021-11-23 02:19:38,321 INFO L78 Accepts]: Start accepts. Automaton has 21111 states and 30548 transitions. Word has length 374 [2021-11-23 02:19:38,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:19:38,322 INFO L470 AbstractCegarLoop]: Abstraction has 21111 states and 30548 transitions. [2021-11-23 02:19:38,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 3 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (39), 3 states have call predecessors, (39), 3 states have call successors, (39) [2021-11-23 02:19:38,323 INFO L276 IsEmpty]: Start isEmpty. Operand 21111 states and 30548 transitions. [2021-11-23 02:19:38,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2021-11-23 02:19:38,335 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:19:38,336 INFO L514 BasicCegarLoop]: trace histogram [22, 18, 18, 18, 18, 18, 18, 9, 8, 8, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:19:38,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 02:19:38,336 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 02:19:38,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:19:38,337 INFO L85 PathProgramCache]: Analyzing trace with hash -752765799, now seen corresponding path program 1 times [2021-11-23 02:19:38,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:19:38,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042352657] [2021-11-23 02:19:38,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:19:38,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:19:38,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:19:38,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1537 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 1521 trivial. 0 not checked. [2021-11-23 02:19:38,597 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:19:38,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042352657] [2021-11-23 02:19:38,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042352657] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:19:38,598 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:19:38,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:19:38,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516082773] [2021-11-23 02:19:38,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:19:38,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:19:38,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:19:38,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:19:38,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:19:38,600 INFO L87 Difference]: Start difference. First operand 21111 states and 30548 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-23 02:19:41,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:19:41,699 INFO L93 Difference]: Finished difference Result 21117 states and 30553 transitions. [2021-11-23 02:19:41,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:19:41,699 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 287 [2021-11-23 02:19:41,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:19:41,797 INFO L225 Difference]: With dead ends: 21117 [2021-11-23 02:19:41,798 INFO L226 Difference]: Without dead ends: 21115 [2021-11-23 02:19:41,809 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 02:19:41,810 INFO L933 BasicCegarLoop]: 1590 mSDtfsCounter, 1787 mSDsluCounter, 3699 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1790 SdHoareTripleChecker+Valid, 4751 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:19:41,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1790 Valid, 4751 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-23 02:19:41,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21115 states. [2021-11-23 02:19:43,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21115 to 21115. [2021-11-23 02:19:43,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21115 states, 13664 states have (on average 1.368193793911007) internal successors, (18695), 13898 states have internal predecessors, (18695), 5930 states have call successors, (5930), 1537 states have call predecessors, (5930), 1518 states have return successors, (5926), 5721 states have call predecessors, (5926), 5926 states have call successors, (5926) [2021-11-23 02:19:43,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21115 states to 21115 states and 30551 transitions. [2021-11-23 02:19:43,375 INFO L78 Accepts]: Start accepts. Automaton has 21115 states and 30551 transitions. Word has length 287 [2021-11-23 02:19:43,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:19:43,376 INFO L470 AbstractCegarLoop]: Abstraction has 21115 states and 30551 transitions. [2021-11-23 02:19:43,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-23 02:19:43,377 INFO L276 IsEmpty]: Start isEmpty. Operand 21115 states and 30551 transitions. [2021-11-23 02:19:43,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2021-11-23 02:19:43,390 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:19:43,391 INFO L514 BasicCegarLoop]: trace histogram [22, 18, 18, 18, 18, 18, 18, 10, 9, 9, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:19:43,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 02:19:43,391 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 02:19:43,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:19:43,392 INFO L85 PathProgramCache]: Analyzing trace with hash -379932982, now seen corresponding path program 1 times [2021-11-23 02:19:43,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:19:43,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078723674] [2021-11-23 02:19:43,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:19:43,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:19:43,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:19:43,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1571 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 1553 trivial. 0 not checked. [2021-11-23 02:19:43,637 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:19:43,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078723674] [2021-11-23 02:19:43,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078723674] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:19:43,640 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:19:43,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:19:43,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712210411] [2021-11-23 02:19:43,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:19:43,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:19:43,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:19:43,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:19:43,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:19:43,642 INFO L87 Difference]: Start difference. First operand 21115 states and 30551 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-23 02:19:46,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:19:46,419 INFO L93 Difference]: Finished difference Result 21121 states and 30556 transitions. [2021-11-23 02:19:46,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:19:46,425 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 292 [2021-11-23 02:19:46,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:19:46,515 INFO L225 Difference]: With dead ends: 21121 [2021-11-23 02:19:46,515 INFO L226 Difference]: Without dead ends: 21119 [2021-11-23 02:19:46,526 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 02:19:46,527 INFO L933 BasicCegarLoop]: 1590 mSDtfsCounter, 1787 mSDsluCounter, 3699 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1789 SdHoareTripleChecker+Valid, 4751 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:19:46,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1789 Valid, 4751 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-23 02:19:46,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21119 states. [2021-11-23 02:19:47,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21119 to 21119. [2021-11-23 02:19:47,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21119 states, 13667 states have (on average 1.3681129728543207) internal successors, (18698), 13901 states have internal predecessors, (18698), 5930 states have call successors, (5930), 1538 states have call predecessors, (5930), 1519 states have return successors, (5926), 5721 states have call predecessors, (5926), 5926 states have call successors, (5926) [2021-11-23 02:19:47,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21119 states to 21119 states and 30554 transitions. [2021-11-23 02:19:47,951 INFO L78 Accepts]: Start accepts. Automaton has 21119 states and 30554 transitions. Word has length 292 [2021-11-23 02:19:47,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:19:47,952 INFO L470 AbstractCegarLoop]: Abstraction has 21119 states and 30554 transitions. [2021-11-23 02:19:47,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-23 02:19:47,952 INFO L276 IsEmpty]: Start isEmpty. Operand 21119 states and 30554 transitions. [2021-11-23 02:19:47,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2021-11-23 02:19:47,970 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:19:47,971 INFO L514 BasicCegarLoop]: trace histogram [22, 18, 18, 18, 18, 18, 18, 11, 10, 10, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:19:47,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 02:19:47,971 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:19:47,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:19:47,972 INFO L85 PathProgramCache]: Analyzing trace with hash 994195746, now seen corresponding path program 1 times [2021-11-23 02:19:47,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:19:47,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015185615] [2021-11-23 02:19:47,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:19:47,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:19:48,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:19:48,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1614 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 1594 trivial. 0 not checked. [2021-11-23 02:19:48,240 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:19:48,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015185615] [2021-11-23 02:19:48,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015185615] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:19:48,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:19:48,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:19:48,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839141351] [2021-11-23 02:19:48,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:19:48,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:19:48,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:19:48,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:19:48,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:19:48,243 INFO L87 Difference]: Start difference. First operand 21119 states and 30554 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (41), 3 states have call predecessors, (41), 1 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-23 02:19:50,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:19:50,996 INFO L93 Difference]: Finished difference Result 21125 states and 30559 transitions. [2021-11-23 02:19:50,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:19:50,996 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (41), 3 states have call predecessors, (41), 1 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) Word has length 298 [2021-11-23 02:19:50,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:19:51,062 INFO L225 Difference]: With dead ends: 21125 [2021-11-23 02:19:51,062 INFO L226 Difference]: Without dead ends: 21121 [2021-11-23 02:19:51,072 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 02:19:51,072 INFO L933 BasicCegarLoop]: 1590 mSDtfsCounter, 1786 mSDsluCounter, 3699 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1787 SdHoareTripleChecker+Valid, 4751 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:19:51,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1787 Valid, 4751 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-23 02:19:51,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21121 states. [2021-11-23 02:19:52,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21121 to 21121. [2021-11-23 02:19:52,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21121 states, 13669 states have (on average 1.367985953617675) internal successors, (18699), 13902 states have internal predecessors, (18699), 5930 states have call successors, (5930), 1539 states have call predecessors, (5930), 1519 states have return successors, (5926), 5721 states have call predecessors, (5926), 5926 states have call successors, (5926) [2021-11-23 02:19:52,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21121 states to 21121 states and 30555 transitions. [2021-11-23 02:19:52,481 INFO L78 Accepts]: Start accepts. Automaton has 21121 states and 30555 transitions. Word has length 298 [2021-11-23 02:19:52,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:19:52,482 INFO L470 AbstractCegarLoop]: Abstraction has 21121 states and 30555 transitions. [2021-11-23 02:19:52,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (41), 3 states have call predecessors, (41), 1 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-23 02:19:52,482 INFO L276 IsEmpty]: Start isEmpty. Operand 21121 states and 30555 transitions. [2021-11-23 02:19:52,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-11-23 02:19:52,505 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:19:52,506 INFO L514 BasicCegarLoop]: trace histogram [22, 18, 18, 18, 18, 18, 18, 12, 11, 11, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:19:52,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-23 02:19:52,506 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 02:19:52,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:19:52,507 INFO L85 PathProgramCache]: Analyzing trace with hash -915090335, now seen corresponding path program 1 times [2021-11-23 02:19:52,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:19:52,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384589849] [2021-11-23 02:19:52,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:19:52,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:19:52,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:19:52,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1657 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 1635 trivial. 0 not checked. [2021-11-23 02:19:52,803 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:19:52,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384589849] [2021-11-23 02:19:52,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384589849] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:19:52,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:19:52,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:19:52,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397384707] [2021-11-23 02:19:52,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:19:52,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:19:52,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:19:52,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:19:52,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:19:52,806 INFO L87 Difference]: Start difference. First operand 21121 states and 30555 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (42), 3 states have call predecessors, (42), 1 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) [2021-11-23 02:19:55,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:19:55,547 INFO L93 Difference]: Finished difference Result 21121 states and 30555 transitions. [2021-11-23 02:19:55,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:19:55,548 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (42), 3 states have call predecessors, (42), 1 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) Word has length 304 [2021-11-23 02:19:55,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:19:55,618 INFO L225 Difference]: With dead ends: 21121 [2021-11-23 02:19:55,618 INFO L226 Difference]: Without dead ends: 20824 [2021-11-23 02:19:55,626 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 02:19:55,626 INFO L933 BasicCegarLoop]: 1588 mSDtfsCounter, 1782 mSDsluCounter, 3698 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1782 SdHoareTripleChecker+Valid, 4748 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:19:55,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1782 Valid, 4748 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-23 02:19:55,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20824 states. [2021-11-23 02:19:56,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20824 to 20824. [2021-11-23 02:19:56,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20824 states, 13591 states have (on average 1.363475829593113) internal successors, (18531), 13734 states have internal predecessors, (18531), 5735 states have call successors, (5735), 1496 states have call predecessors, (5735), 1496 states have return successors, (5735), 5635 states have call predecessors, (5735), 5735 states have call successors, (5735) [2021-11-23 02:19:56,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20824 states to 20824 states and 30001 transitions. [2021-11-23 02:19:56,772 INFO L78 Accepts]: Start accepts. Automaton has 20824 states and 30001 transitions. Word has length 304 [2021-11-23 02:19:56,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:19:56,772 INFO L470 AbstractCegarLoop]: Abstraction has 20824 states and 30001 transitions. [2021-11-23 02:19:56,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (42), 3 states have call predecessors, (42), 1 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) [2021-11-23 02:19:56,772 INFO L276 IsEmpty]: Start isEmpty. Operand 20824 states and 30001 transitions. [2021-11-23 02:19:56,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2021-11-23 02:19:56,785 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:19:56,786 INFO L514 BasicCegarLoop]: trace histogram [25, 18, 18, 18, 18, 18, 18, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:19:56,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-23 02:19:56,786 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:19:56,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:19:56,787 INFO L85 PathProgramCache]: Analyzing trace with hash 377917185, now seen corresponding path program 1 times [2021-11-23 02:19:56,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:19:56,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150699666] [2021-11-23 02:19:56,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:19:56,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:19:56,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:19:57,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1565 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1551 trivial. 0 not checked. [2021-11-23 02:19:57,008 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:19:57,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150699666] [2021-11-23 02:19:57,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150699666] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:19:57,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:19:57,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:19:57,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138343938] [2021-11-23 02:19:57,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:19:57,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:19:57,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:19:57,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:19:57,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:19:57,012 INFO L87 Difference]: Start difference. First operand 20824 states and 30001 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 3 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-23 02:20:02,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:20:02,892 INFO L93 Difference]: Finished difference Result 47744 states and 68700 transitions. [2021-11-23 02:20:02,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:20:02,893 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 3 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) Word has length 298 [2021-11-23 02:20:02,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:20:03,021 INFO L225 Difference]: With dead ends: 47744 [2021-11-23 02:20:03,021 INFO L226 Difference]: Without dead ends: 27000 [2021-11-23 02:20:03,091 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 02:20:03,092 INFO L933 BasicCegarLoop]: 2862 mSDtfsCounter, 1515 mSDsluCounter, 8367 mSDsCounter, 0 mSdLazyCounter, 1717 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1515 SdHoareTripleChecker+Valid, 10090 SdHoareTripleChecker+Invalid, 1718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:20:03,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1515 Valid, 10090 Invalid, 1718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1717 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-11-23 02:20:03,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27000 states. [2021-11-23 02:20:04,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27000 to 26956. [2021-11-23 02:20:04,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26956 states, 17528 states have (on average 1.357371063441351) internal successors, (23792), 17725 states have internal predecessors, (23792), 7474 states have call successors, (7474), 1942 states have call predecessors, (7474), 1952 states have return successors, (7484), 7344 states have call predecessors, (7484), 7474 states have call successors, (7484) [2021-11-23 02:20:04,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26956 states to 26956 states and 38750 transitions. [2021-11-23 02:20:04,869 INFO L78 Accepts]: Start accepts. Automaton has 26956 states and 38750 transitions. Word has length 298 [2021-11-23 02:20:04,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:20:04,870 INFO L470 AbstractCegarLoop]: Abstraction has 26956 states and 38750 transitions. [2021-11-23 02:20:04,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 3 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-23 02:20:04,870 INFO L276 IsEmpty]: Start isEmpty. Operand 26956 states and 38750 transitions. [2021-11-23 02:20:04,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2021-11-23 02:20:04,887 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:20:04,887 INFO L514 BasicCegarLoop]: trace histogram [25, 18, 18, 18, 18, 18, 18, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:20:04,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-23 02:20:04,888 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:20:04,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:20:04,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1774863207, now seen corresponding path program 1 times [2021-11-23 02:20:04,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:20:04,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524963205] [2021-11-23 02:20:04,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:20:04,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:20:04,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:20:05,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1565 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1551 trivial. 0 not checked. [2021-11-23 02:20:05,104 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:20:05,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524963205] [2021-11-23 02:20:05,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524963205] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:20:05,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:20:05,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:20:05,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032377287] [2021-11-23 02:20:05,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:20:05,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:20:05,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:20:05,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:20:05,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:20:05,106 INFO L87 Difference]: Start difference. First operand 26956 states and 38750 transitions. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 states have internal predecessors, (90), 3 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-23 02:20:10,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:20:10,670 INFO L93 Difference]: Finished difference Result 60028 states and 86238 transitions. [2021-11-23 02:20:10,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:20:10,671 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 states have internal predecessors, (90), 3 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) Word has length 299 [2021-11-23 02:20:10,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:20:10,822 INFO L225 Difference]: With dead ends: 60028 [2021-11-23 02:20:10,822 INFO L226 Difference]: Without dead ends: 33152 [2021-11-23 02:20:10,902 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 02:20:10,902 INFO L933 BasicCegarLoop]: 2867 mSDtfsCounter, 1514 mSDsluCounter, 8375 mSDsCounter, 0 mSdLazyCounter, 1722 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1514 SdHoareTripleChecker+Valid, 10105 SdHoareTripleChecker+Invalid, 1724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:20:10,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1514 Valid, 10105 Invalid, 1724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1722 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-11-23 02:20:10,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33152 states. [2021-11-23 02:20:12,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33152 to 33108. [2021-11-23 02:20:12,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33108 states, 21485 states have (on average 1.3531766348615313) internal successors, (29073), 21736 states have internal predecessors, (29073), 9213 states have call successors, (9213), 2388 states have call predecessors, (9213), 2408 states have return successors, (9233), 9053 states have call predecessors, (9233), 9213 states have call successors, (9233) [2021-11-23 02:20:12,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33108 states to 33108 states and 47519 transitions. [2021-11-23 02:20:12,747 INFO L78 Accepts]: Start accepts. Automaton has 33108 states and 47519 transitions. Word has length 299 [2021-11-23 02:20:12,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:20:12,748 INFO L470 AbstractCegarLoop]: Abstraction has 33108 states and 47519 transitions. [2021-11-23 02:20:12,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 states have internal predecessors, (90), 3 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-23 02:20:12,748 INFO L276 IsEmpty]: Start isEmpty. Operand 33108 states and 47519 transitions. [2021-11-23 02:20:12,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2021-11-23 02:20:12,761 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:20:12,762 INFO L514 BasicCegarLoop]: trace histogram [25, 18, 18, 18, 18, 18, 18, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:20:12,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-23 02:20:12,762 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 02:20:12,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:20:12,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1291361314, now seen corresponding path program 1 times [2021-11-23 02:20:12,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:20:12,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374061224] [2021-11-23 02:20:12,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:20:12,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:20:12,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:20:12,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1565 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1551 trivial. 0 not checked. [2021-11-23 02:20:12,966 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:20:12,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374061224] [2021-11-23 02:20:12,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374061224] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:20:12,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:20:12,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:20:12,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21983880] [2021-11-23 02:20:12,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:20:12,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:20:12,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:20:12,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:20:12,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:20:12,969 INFO L87 Difference]: Start difference. First operand 33108 states and 47519 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 3 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-23 02:20:18,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:20:18,750 INFO L93 Difference]: Finished difference Result 72617 states and 104132 transitions. [2021-11-23 02:20:18,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:20:18,751 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 3 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) Word has length 300 [2021-11-23 02:20:18,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:20:18,918 INFO L225 Difference]: With dead ends: 72617 [2021-11-23 02:20:18,919 INFO L226 Difference]: Without dead ends: 39589 [2021-11-23 02:20:19,015 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 02:20:19,016 INFO L933 BasicCegarLoop]: 2865 mSDtfsCounter, 1526 mSDsluCounter, 8362 mSDsCounter, 0 mSdLazyCounter, 1732 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1526 SdHoareTripleChecker+Valid, 10089 SdHoareTripleChecker+Invalid, 1738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:20:19,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1526 Valid, 10089 Invalid, 1738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1732 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-11-23 02:20:19,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39589 states. [2021-11-23 02:20:21,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39589 to 39545. [2021-11-23 02:20:21,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39545 states, 25614 states have (on average 1.349105957679394) internal successors, (34556), 25919 states have internal predecessors, (34556), 11014 states have call successors, (11014), 2885 states have call predecessors, (11014), 2915 states have return successors, (11044), 10824 states have call predecessors, (11044), 11014 states have call successors, (11044) [2021-11-23 02:20:21,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39545 states to 39545 states and 56614 transitions. [2021-11-23 02:20:21,498 INFO L78 Accepts]: Start accepts. Automaton has 39545 states and 56614 transitions. Word has length 300 [2021-11-23 02:20:21,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:20:21,498 INFO L470 AbstractCegarLoop]: Abstraction has 39545 states and 56614 transitions. [2021-11-23 02:20:21,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 3 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-23 02:20:21,499 INFO L276 IsEmpty]: Start isEmpty. Operand 39545 states and 56614 transitions. [2021-11-23 02:20:21,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2021-11-23 02:20:21,513 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:20:21,513 INFO L514 BasicCegarLoop]: trace histogram [25, 18, 18, 18, 18, 18, 18, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:20:21,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-23 02:20:21,514 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 02:20:21,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:20:21,514 INFO L85 PathProgramCache]: Analyzing trace with hash -663176271, now seen corresponding path program 1 times [2021-11-23 02:20:21,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:20:21,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475705612] [2021-11-23 02:20:21,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:20:21,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:20:21,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:20:21,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1565 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1551 trivial. 0 not checked. [2021-11-23 02:20:21,708 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:20:21,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475705612] [2021-11-23 02:20:21,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475705612] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:20:21,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:20:21,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:20:21,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315697943] [2021-11-23 02:20:21,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:20:21,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:20:21,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:20:21,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:20:21,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:20:21,711 INFO L87 Difference]: Start difference. First operand 39545 states and 56614 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 3 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-23 02:20:28,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:20:28,450 INFO L93 Difference]: Finished difference Result 85246 states and 122046 transitions. [2021-11-23 02:20:28,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:20:28,453 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 3 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) Word has length 301 [2021-11-23 02:20:28,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:20:28,687 INFO L225 Difference]: With dead ends: 85246 [2021-11-23 02:20:28,688 INFO L226 Difference]: Without dead ends: 45781 [2021-11-23 02:20:28,813 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 02:20:28,814 INFO L933 BasicCegarLoop]: 2866 mSDtfsCounter, 1517 mSDsluCounter, 8371 mSDsCounter, 0 mSdLazyCounter, 1733 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1517 SdHoareTripleChecker+Valid, 10100 SdHoareTripleChecker+Invalid, 1740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:20:28,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1517 Valid, 10100 Invalid, 1740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1733 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-11-23 02:20:28,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45781 states. [2021-11-23 02:20:31,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45781 to 45737. [2021-11-23 02:20:31,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45737 states, 29611 states have (on average 1.3466954847860593) internal successors, (39877), 29970 states have internal predecessors, (39877), 12753 states have call successors, (12753), 3331 states have call predecessors, (12753), 3371 states have return successors, (12793), 12533 states have call predecessors, (12793), 12753 states have call successors, (12793) [2021-11-23 02:20:31,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45737 states to 45737 states and 65423 transitions. [2021-11-23 02:20:31,635 INFO L78 Accepts]: Start accepts. Automaton has 45737 states and 65423 transitions. Word has length 301 [2021-11-23 02:20:31,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:20:31,637 INFO L470 AbstractCegarLoop]: Abstraction has 45737 states and 65423 transitions. [2021-11-23 02:20:31,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 3 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-23 02:20:31,637 INFO L276 IsEmpty]: Start isEmpty. Operand 45737 states and 65423 transitions. [2021-11-23 02:20:31,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2021-11-23 02:20:31,665 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:20:31,665 INFO L514 BasicCegarLoop]: trace histogram [25, 18, 18, 18, 18, 18, 18, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:20:31,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-23 02:20:31,666 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 02:20:31,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:20:31,666 INFO L85 PathProgramCache]: Analyzing trace with hash 41024077, now seen corresponding path program 1 times [2021-11-23 02:20:31,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:20:31,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294489607] [2021-11-23 02:20:31,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:20:31,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:20:31,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:20:31,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1565 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1551 trivial. 0 not checked. [2021-11-23 02:20:31,911 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:20:31,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294489607] [2021-11-23 02:20:31,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294489607] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:20:31,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:20:31,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:20:31,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899401370] [2021-11-23 02:20:31,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:20:31,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:20:31,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:20:31,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:20:31,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:20:31,916 INFO L87 Difference]: Start difference. First operand 45737 states and 65423 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 3 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-23 02:20:39,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:20:39,540 INFO L93 Difference]: Finished difference Result 97640 states and 139684 transitions. [2021-11-23 02:20:39,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:20:39,541 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), 3 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) Word has length 302 [2021-11-23 02:20:39,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:20:39,744 INFO L225 Difference]: With dead ends: 97640 [2021-11-23 02:20:39,744 INFO L226 Difference]: Without dead ends: 51983 [2021-11-23 02:20:39,861 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 02:20:39,861 INFO L933 BasicCegarLoop]: 2866 mSDtfsCounter, 1514 mSDsluCounter, 8373 mSDsCounter, 0 mSdLazyCounter, 1737 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1514 SdHoareTripleChecker+Valid, 10102 SdHoareTripleChecker+Invalid, 1744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:20:39,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1514 Valid, 10102 Invalid, 1744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1737 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2021-11-23 02:20:39,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51983 states.