./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-sun-cassini.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64c9a7b-5ae8-44ac-b0ca-b1e5faa33baf/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64c9a7b-5ae8-44ac-b0ca-b1e5faa33baf/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64c9a7b-5ae8-44ac-b0ca-b1e5faa33baf/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64c9a7b-5ae8-44ac-b0ca-b1e5faa33baf/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-sun-cassini.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64c9a7b-5ae8-44ac-b0ca-b1e5faa33baf/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64c9a7b-5ae8-44ac-b0ca-b1e5faa33baf/bin/utaipan-Q6hlc19bkW --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 463dbca1530ea0e57c159e9405d50f794488f63283b3e27908f44b92b1921358 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 15:27:10,410 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:27:10,413 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:27:10,466 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:27:10,469 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:27:10,470 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:27:10,472 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:27:10,474 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:27:10,476 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:27:10,477 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:27:10,478 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:27:10,480 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:27:10,480 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:27:10,481 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:27:10,483 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:27:10,484 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:27:10,485 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:27:10,487 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:27:10,489 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:27:10,491 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:27:10,493 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:27:10,507 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:27:10,508 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:27:10,509 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:27:10,513 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:27:10,514 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:27:10,514 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:27:10,516 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:27:10,516 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:27:10,518 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:27:10,518 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:27:10,519 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:27:10,520 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:27:10,522 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:27:10,523 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:27:10,523 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:27:10,524 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:27:10,525 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:27:10,525 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:27:10,526 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:27:10,527 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:27:10,529 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64c9a7b-5ae8-44ac-b0ca-b1e5faa33baf/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-23 15:27:10,559 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:27:10,560 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:27:10,560 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:27:10,561 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:27:10,561 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:27:10,562 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:27:10,562 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:27:10,563 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:27:10,563 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:27:10,563 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:27:10,564 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:27:10,564 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:27:10,564 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:27:10,564 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:27:10,565 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:27:10,565 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:27:10,566 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:27:10,566 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:27:10,567 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:27:10,567 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:27:10,567 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:27:10,568 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:27:10,568 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:27:10,568 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:27:10,569 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:27:10,569 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:27:10,569 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:27:10,570 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:27:10,570 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:27:10,570 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:27:10,571 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:27:10,571 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:27:10,571 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:27:10,572 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:27:10,572 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:27:10,572 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:27:10,573 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:27:10,573 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:27:10,573 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_f64c9a7b-5ae8-44ac-b0ca-b1e5faa33baf/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64c9a7b-5ae8-44ac-b0ca-b1e5faa33baf/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 463dbca1530ea0e57c159e9405d50f794488f63283b3e27908f44b92b1921358 [2022-11-23 15:27:10,969 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:27:11,016 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:27:11,019 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:27:11,020 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:27:11,021 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:27:11,023 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64c9a7b-5ae8-44ac-b0ca-b1e5faa33baf/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-sun-cassini.cil.i [2022-11-23 15:27:14,689 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:27:15,580 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:27:15,580 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64c9a7b-5ae8-44ac-b0ca-b1e5faa33baf/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-sun-cassini.cil.i [2022-11-23 15:27:15,662 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64c9a7b-5ae8-44ac-b0ca-b1e5faa33baf/bin/utaipan-Q6hlc19bkW/data/77926a367/79203de27abc458cb7ab93e412b1af8d/FLAG5d720bfae [2022-11-23 15:27:15,688 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64c9a7b-5ae8-44ac-b0ca-b1e5faa33baf/bin/utaipan-Q6hlc19bkW/data/77926a367/79203de27abc458cb7ab93e412b1af8d [2022-11-23 15:27:15,694 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:27:15,697 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:27:15,699 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:27:15,699 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:27:15,704 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:27:15,705 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:27:15" (1/1) ... [2022-11-23 15:27:15,707 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24f9c057 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:15, skipping insertion in model container [2022-11-23 15:27:15,707 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:27:15" (1/1) ... [2022-11-23 15:27:15,717 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:27:16,008 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:27:21,917 WARN L237 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_f64c9a7b-5ae8-44ac-b0ca-b1e5faa33baf/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-sun-cassini.cil.i[487146,487159] [2022-11-23 15:27:21,923 WARN L237 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_f64c9a7b-5ae8-44ac-b0ca-b1e5faa33baf/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-sun-cassini.cil.i[487315,487328] [2022-11-23 15:27:21,930 WARN L237 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_f64c9a7b-5ae8-44ac-b0ca-b1e5faa33baf/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-sun-cassini.cil.i[487482,487495] [2022-11-23 15:27:21,931 WARN L237 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_f64c9a7b-5ae8-44ac-b0ca-b1e5faa33baf/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-sun-cassini.cil.i[487650,487663] [2022-11-23 15:27:21,971 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:27:22,059 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:27:22,800 WARN L237 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_f64c9a7b-5ae8-44ac-b0ca-b1e5faa33baf/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-sun-cassini.cil.i[487146,487159] [2022-11-23 15:27:22,801 WARN L237 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_f64c9a7b-5ae8-44ac-b0ca-b1e5faa33baf/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-sun-cassini.cil.i[487315,487328] [2022-11-23 15:27:22,802 WARN L237 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_f64c9a7b-5ae8-44ac-b0ca-b1e5faa33baf/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-sun-cassini.cil.i[487482,487495] [2022-11-23 15:27:22,802 WARN L237 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_f64c9a7b-5ae8-44ac-b0ca-b1e5faa33baf/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-sun-cassini.cil.i[487650,487663] [2022-11-23 15:27:22,820 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:27:23,246 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:27:23,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:23 WrapperNode [2022-11-23 15:27:23,247 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:27:23,248 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:27:23,249 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:27:23,249 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:27:23,258 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:23" (1/1) ... [2022-11-23 15:27:23,422 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:23" (1/1) ... [2022-11-23 15:27:23,857 INFO L138 Inliner]: procedures = 676, calls = 4258, calls flagged for inlining = 325, calls inlined = 302, statements flattened = 10246 [2022-11-23 15:27:23,858 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:27:23,859 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:27:23,859 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:27:23,860 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:27:23,873 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:23" (1/1) ... [2022-11-23 15:27:23,873 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:23" (1/1) ... [2022-11-23 15:27:23,976 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:23" (1/1) ... [2022-11-23 15:27:23,977 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:23" (1/1) ... [2022-11-23 15:27:24,399 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:23" (1/1) ... [2022-11-23 15:27:24,445 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:23" (1/1) ... [2022-11-23 15:27:24,493 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:23" (1/1) ... [2022-11-23 15:27:24,514 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:23" (1/1) ... [2022-11-23 15:27:24,572 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:27:24,573 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:27:24,574 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:27:24,574 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:27:24,575 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:23" (1/1) ... [2022-11-23 15:27:24,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:27:24,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64c9a7b-5ae8-44ac-b0ca-b1e5faa33baf/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:27:24,612 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64c9a7b-5ae8-44ac-b0ca-b1e5faa33baf/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:27:24,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64c9a7b-5ae8-44ac-b0ca-b1e5faa33baf/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:27:24,666 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2022-11-23 15:27:24,667 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2022-11-23 15:27:24,667 INFO L130 BoogieDeclarations]: Found specification of procedure cas_phy_read [2022-11-23 15:27:24,667 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_phy_read [2022-11-23 15:27:24,667 INFO L130 BoogieDeclarations]: Found specification of procedure cas_pcs_link_check [2022-11-23 15:27:24,668 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_pcs_link_check [2022-11-23 15:27:24,668 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mod_timer_121 [2022-11-23 15:27:24,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mod_timer_121 [2022-11-23 15:27:24,668 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2022-11-23 15:27:24,668 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2022-11-23 15:27:24,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-23 15:27:24,669 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-23 15:27:24,669 INFO L130 BoogieDeclarations]: Found specification of procedure lowmem_page_address [2022-11-23 15:27:24,669 INFO L138 BoogieDeclarations]: Found implementation of procedure lowmem_page_address [2022-11-23 15:27:24,669 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_page [2022-11-23 15:27:24,670 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_page [2022-11-23 15:27:24,670 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-23 15:27:24,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-23 15:27:24,670 INFO L130 BoogieDeclarations]: Found specification of procedure cas_mii_link_check [2022-11-23 15:27:24,671 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_mii_link_check [2022-11-23 15:27:24,671 INFO L130 BoogieDeclarations]: Found specification of procedure cas_calc_tabort [2022-11-23 15:27:24,671 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_calc_tabort [2022-11-23 15:27:24,671 INFO L130 BoogieDeclarations]: Found specification of procedure pci_read_config_word [2022-11-23 15:27:24,671 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_read_config_word [2022-11-23 15:27:24,672 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_timer_timer_instance_3 [2022-11-23 15:27:24,672 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_timer_timer_instance_3 [2022-11-23 15:27:24,672 INFO L130 BoogieDeclarations]: Found specification of procedure pci_dma_sync_single_for_cpu [2022-11-23 15:27:24,672 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_dma_sync_single_for_cpu [2022-11-23 15:27:24,673 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2022-11-23 15:27:24,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2022-11-23 15:27:24,673 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mod_timer_147 [2022-11-23 15:27:24,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mod_timer_147 [2022-11-23 15:27:24,673 INFO L130 BoogieDeclarations]: Found specification of procedure dma_map_page [2022-11-23 15:27:24,674 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_map_page [2022-11-23 15:27:24,674 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2022-11-23 15:27:24,674 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2022-11-23 15:27:24,674 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_on [2022-11-23 15:27:24,674 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_on [2022-11-23 15:27:24,675 INFO L130 BoogieDeclarations]: Found specification of procedure cas_lock_tx [2022-11-23 15:27:24,675 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_lock_tx [2022-11-23 15:27:24,675 INFO L130 BoogieDeclarations]: Found specification of procedure pci_name [2022-11-23 15:27:24,675 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_name [2022-11-23 15:27:24,675 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-11-23 15:27:24,676 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-11-23 15:27:24,676 INFO L130 BoogieDeclarations]: Found specification of procedure cas_disable_irq [2022-11-23 15:27:24,676 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_disable_irq [2022-11-23 15:27:24,676 INFO L130 BoogieDeclarations]: Found specification of procedure cas_free_rxds [2022-11-23 15:27:24,676 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_free_rxds [2022-11-23 15:27:24,677 INFO L130 BoogieDeclarations]: Found specification of procedure pci_map_page [2022-11-23 15:27:24,677 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_map_page [2022-11-23 15:27:24,677 INFO L130 BoogieDeclarations]: Found specification of procedure cas_open [2022-11-23 15:27:24,677 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_open [2022-11-23 15:27:24,678 INFO L130 BoogieDeclarations]: Found specification of procedure cas_interrupt [2022-11-23 15:27:24,678 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_interrupt [2022-11-23 15:27:24,678 INFO L130 BoogieDeclarations]: Found specification of procedure cas_tx_tiny_free [2022-11-23 15:27:24,678 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_tx_tiny_free [2022-11-23 15:27:24,678 INFO L130 BoogieDeclarations]: Found specification of procedure PageTail [2022-11-23 15:27:24,679 INFO L138 BoogieDeclarations]: Found implementation of procedure PageTail [2022-11-23 15:27:24,679 INFO L130 BoogieDeclarations]: Found specification of procedure tx_tiny_map [2022-11-23 15:27:24,679 INFO L138 BoogieDeclarations]: Found implementation of procedure tx_tiny_map [2022-11-23 15:27:24,679 INFO L130 BoogieDeclarations]: Found specification of procedure cas_phy_init [2022-11-23 15:27:24,679 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_phy_init [2022-11-23 15:27:24,680 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_pages [2022-11-23 15:27:24,680 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_pages [2022-11-23 15:27:24,680 INFO L130 BoogieDeclarations]: Found specification of procedure skb_frag_size_set [2022-11-23 15:27:24,680 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_frag_size_set [2022-11-23 15:27:24,680 INFO L130 BoogieDeclarations]: Found specification of procedure pci_get_drvdata [2022-11-23 15:27:24,681 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_get_drvdata [2022-11-23 15:27:24,681 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2022-11-23 15:27:24,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2022-11-23 15:27:24,681 INFO L130 BoogieDeclarations]: Found specification of procedure cas_enable_irq [2022-11-23 15:27:24,681 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_enable_irq [2022-11-23 15:27:24,682 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2022-11-23 15:27:24,682 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2022-11-23 15:27:24,682 INFO L130 BoogieDeclarations]: Found specification of procedure skb_end_pointer [2022-11-23 15:27:24,682 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_end_pointer [2022-11-23 15:27:24,682 INFO L130 BoogieDeclarations]: Found specification of procedure cas_page_dequeue [2022-11-23 15:27:24,683 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_page_dequeue [2022-11-23 15:27:24,683 INFO L130 BoogieDeclarations]: Found specification of procedure netif_rx [2022-11-23 15:27:24,683 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_rx [2022-11-23 15:27:24,683 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2022-11-23 15:27:24,683 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2022-11-23 15:27:24,684 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2022-11-23 15:27:24,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2022-11-23 15:27:24,684 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-11-23 15:27:24,684 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-11-23 15:27:24,684 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_attach [2022-11-23 15:27:24,685 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_attach [2022-11-23 15:27:24,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 15:27:24,685 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_108 [2022-11-23 15:27:24,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_108 [2022-11-23 15:27:24,685 INFO L130 BoogieDeclarations]: Found specification of procedure pci_write_config_word [2022-11-23 15:27:24,686 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_write_config_word [2022-11-23 15:27:24,686 INFO L130 BoogieDeclarations]: Found specification of procedure cas_set_multicast [2022-11-23 15:27:24,686 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_set_multicast [2022-11-23 15:27:24,686 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2022-11-23 15:27:24,687 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2022-11-23 15:27:24,687 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_detach [2022-11-23 15:27:24,687 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_detach [2022-11-23 15:27:24,688 INFO L130 BoogieDeclarations]: Found specification of procedure cas_spare_free [2022-11-23 15:27:24,688 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_spare_free [2022-11-23 15:27:24,688 INFO L130 BoogieDeclarations]: Found specification of procedure cas_tx_timeout [2022-11-23 15:27:24,688 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_tx_timeout [2022-11-23 15:27:24,688 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-11-23 15:27:24,689 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-11-23 15:27:24,689 INFO L130 BoogieDeclarations]: Found specification of procedure cas_read_pcs_link_mode [2022-11-23 15:27:24,689 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_read_pcs_link_mode [2022-11-23 15:27:24,689 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2022-11-23 15:27:24,689 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2022-11-23 15:27:24,690 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-23 15:27:24,690 INFO L130 BoogieDeclarations]: Found specification of procedure cas_close [2022-11-23 15:27:24,690 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_close [2022-11-23 15:27:24,690 INFO L130 BoogieDeclarations]: Found specification of procedure cas_page_swap [2022-11-23 15:27:24,690 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_page_swap [2022-11-23 15:27:24,691 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2022-11-23 15:27:24,691 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2022-11-23 15:27:24,691 INFO L130 BoogieDeclarations]: Found specification of procedure cas_netpoll [2022-11-23 15:27:24,691 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_netpoll [2022-11-23 15:27:24,691 INFO L130 BoogieDeclarations]: Found specification of procedure cas_hard_reset [2022-11-23 15:27:24,692 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_hard_reset [2022-11-23 15:27:24,692 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2022-11-23 15:27:24,692 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2022-11-23 15:27:24,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-23 15:27:24,693 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2022-11-23 15:27:24,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2022-11-23 15:27:24,693 INFO L130 BoogieDeclarations]: Found specification of procedure cas_rxc_init [2022-11-23 15:27:24,693 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_rxc_init [2022-11-23 15:27:24,693 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 15:27:24,693 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-23 15:27:24,694 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-23 15:27:24,694 INFO L130 BoogieDeclarations]: Found specification of procedure cas_clear_mac_err [2022-11-23 15:27:24,694 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_clear_mac_err [2022-11-23 15:27:24,694 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_interrupt_context [2022-11-23 15:27:24,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_interrupt_context [2022-11-23 15:27:24,695 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2022-11-23 15:27:24,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2022-11-23 15:27:24,695 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2022-11-23 15:27:24,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2022-11-23 15:27:24,695 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_dma_mask [2022-11-23 15:27:24,696 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_dma_mask [2022-11-23 15:27:24,696 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_timer_instance_callback_3_2 [2022-11-23 15:27:24,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_timer_instance_callback_3_2 [2022-11-23 15:27:24,696 INFO L130 BoogieDeclarations]: Found specification of procedure cas_remove_one [2022-11-23 15:27:24,696 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_remove_one [2022-11-23 15:27:24,697 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_NOT_ARG_SIGN [2022-11-23 15:27:24,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_NOT_ARG_SIGN [2022-11-23 15:27:24,697 INFO L130 BoogieDeclarations]: Found specification of procedure pci_free_consistent [2022-11-23 15:27:24,697 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_free_consistent [2022-11-23 15:27:24,697 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2022-11-23 15:27:24,697 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2022-11-23 15:27:24,698 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2022-11-23 15:27:24,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2022-11-23 15:27:24,698 INFO L130 BoogieDeclarations]: Found specification of procedure __skb_dequeue [2022-11-23 15:27:24,698 INFO L138 BoogieDeclarations]: Found implementation of procedure __skb_dequeue [2022-11-23 15:27:24,698 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 15:27:24,699 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mod_timer [2022-11-23 15:27:24,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mod_timer [2022-11-23 15:27:24,699 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:27:24,699 INFO L130 BoogieDeclarations]: Found specification of procedure list_splice_init [2022-11-23 15:27:24,699 INFO L138 BoogieDeclarations]: Found implementation of procedure list_splice_init [2022-11-23 15:27:24,700 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2022-11-23 15:27:24,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2022-11-23 15:27:24,700 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2022-11-23 15:27:24,700 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2022-11-23 15:27:24,700 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 15:27:24,700 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-11-23 15:27:24,701 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-11-23 15:27:24,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-11-23 15:27:24,701 INFO L130 BoogieDeclarations]: Found specification of procedure cas_set_link_modes [2022-11-23 15:27:24,701 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_set_link_modes [2022-11-23 15:27:24,701 INFO L130 BoogieDeclarations]: Found specification of procedure cas_link_timer [2022-11-23 15:27:24,702 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_link_timer [2022-11-23 15:27:24,702 INFO L130 BoogieDeclarations]: Found specification of procedure cas_read_mii_link_mode [2022-11-23 15:27:24,702 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_read_mii_link_mode [2022-11-23 15:27:24,702 INFO L130 BoogieDeclarations]: Found specification of procedure __list_splice [2022-11-23 15:27:24,702 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_splice [2022-11-23 15:27:24,702 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2022-11-23 15:27:24,703 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2022-11-23 15:27:24,703 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~TO~VOID [2022-11-23 15:27:24,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~TO~VOID [2022-11-23 15:27:24,703 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2022-11-23 15:27:24,703 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2022-11-23 15:27:24,704 INFO L130 BoogieDeclarations]: Found specification of procedure kmap_atomic [2022-11-23 15:27:24,704 INFO L138 BoogieDeclarations]: Found implementation of procedure kmap_atomic [2022-11-23 15:27:24,704 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_spin_lock [2022-11-23 15:27:24,704 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_spin_lock [2022-11-23 15:27:24,704 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2022-11-23 15:27:24,705 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2022-11-23 15:27:24,705 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2022-11-23 15:27:24,705 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2022-11-23 15:27:24,705 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2022-11-23 15:27:24,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2022-11-23 15:27:24,705 INFO L130 BoogieDeclarations]: Found specification of procedure csum_unfold [2022-11-23 15:27:24,706 INFO L138 BoogieDeclarations]: Found implementation of procedure csum_unfold [2022-11-23 15:27:24,706 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~TO~VOID [2022-11-23 15:27:24,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~TO~VOID [2022-11-23 15:27:24,706 INFO L130 BoogieDeclarations]: Found specification of procedure writel [2022-11-23 15:27:24,706 INFO L138 BoogieDeclarations]: Found implementation of procedure writel [2022-11-23 15:27:24,707 INFO L130 BoogieDeclarations]: Found specification of procedure cas_entropy_gather [2022-11-23 15:27:24,707 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_entropy_gather [2022-11-23 15:27:24,707 INFO L130 BoogieDeclarations]: Found specification of procedure cas_resume [2022-11-23 15:27:24,707 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_resume [2022-11-23 15:27:24,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:27:24,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:27:24,708 INFO L130 BoogieDeclarations]: Found specification of procedure cas_page_alloc [2022-11-23 15:27:24,708 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_page_alloc [2022-11-23 15:27:24,708 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-23 15:27:24,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-23 15:27:24,708 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-23 15:27:24,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-23 15:27:24,709 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2022-11-23 15:27:24,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2022-11-23 15:27:24,709 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_off [2022-11-23 15:27:24,709 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_off [2022-11-23 15:27:24,710 INFO L130 BoogieDeclarations]: Found specification of procedure cas_mif_poll [2022-11-23 15:27:24,710 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_mif_poll [2022-11-23 15:27:24,710 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_process_context [2022-11-23 15:27:24,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_process_context [2022-11-23 15:27:24,710 INFO L130 BoogieDeclarations]: Found specification of procedure cas_unlock_tx [2022-11-23 15:27:24,711 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_unlock_tx [2022-11-23 15:27:24,711 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-11-23 15:27:24,711 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-11-23 15:27:24,711 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_133 [2022-11-23 15:27:24,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_133 [2022-11-23 15:27:24,711 INFO L130 BoogieDeclarations]: Found specification of procedure list_splice [2022-11-23 15:27:24,712 INFO L138 BoogieDeclarations]: Found implementation of procedure list_splice [2022-11-23 15:27:24,712 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_135 [2022-11-23 15:27:24,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_135 [2022-11-23 15:27:24,712 INFO L130 BoogieDeclarations]: Found specification of procedure ethtool_cmd_speed_set [2022-11-23 15:27:24,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ethtool_cmd_speed_set [2022-11-23 15:27:24,713 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_sub [2022-11-23 15:27:24,713 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_sub [2022-11-23 15:27:24,713 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_read [2022-11-23 15:27:24,713 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_read [2022-11-23 15:27:24,713 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-23 15:27:24,714 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-23 15:27:24,714 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2022-11-23 15:27:24,714 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2022-11-23 15:27:24,714 INFO L130 BoogieDeclarations]: Found specification of procedure pci_alloc_consistent [2022-11-23 15:27:24,714 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_alloc_consistent [2022-11-23 15:27:24,715 INFO L130 BoogieDeclarations]: Found specification of procedure tx_tiny_buf [2022-11-23 15:27:24,715 INFO L138 BoogieDeclarations]: Found implementation of procedure tx_tiny_buf [2022-11-23 15:27:24,715 INFO L130 BoogieDeclarations]: Found specification of procedure cas_mac_reset [2022-11-23 15:27:24,715 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_mac_reset [2022-11-23 15:27:24,715 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_lock_of_cas [2022-11-23 15:27:24,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_lock_of_cas [2022-11-23 15:27:24,716 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 15:27:24,716 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2022-11-23 15:27:24,716 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2022-11-23 15:27:24,716 INFO L130 BoogieDeclarations]: Found specification of procedure __skb_frag_set_page [2022-11-23 15:27:24,717 INFO L138 BoogieDeclarations]: Found implementation of procedure __skb_frag_set_page [2022-11-23 15:27:24,717 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 15:27:24,717 INFO L130 BoogieDeclarations]: Found specification of procedure cas_get_regs_len [2022-11-23 15:27:24,717 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_get_regs_len [2022-11-23 15:27:24,717 INFO L130 BoogieDeclarations]: Found specification of procedure cas_reset [2022-11-23 15:27:24,718 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_reset [2022-11-23 15:27:24,718 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dispatch_instance_register_8_2 [2022-11-23 15:27:24,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dispatch_instance_register_8_2 [2022-11-23 15:27:24,718 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_NOT_ARG_SIGN [2022-11-23 15:27:24,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_NOT_ARG_SIGN [2022-11-23 15:27:24,719 INFO L130 BoogieDeclarations]: Found specification of procedure __free_pages [2022-11-23 15:27:24,719 INFO L138 BoogieDeclarations]: Found implementation of procedure __free_pages [2022-11-23 15:27:24,719 INFO L130 BoogieDeclarations]: Found specification of procedure cas_post_page [2022-11-23 15:27:24,719 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_post_page [2022-11-23 15:27:24,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-23 15:27:24,719 INFO L130 BoogieDeclarations]: Found specification of procedure pci_write_config_byte [2022-11-23 15:27:24,720 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_write_config_byte [2022-11-23 15:27:24,720 INFO L130 BoogieDeclarations]: Found specification of procedure cas_nway_reset [2022-11-23 15:27:24,720 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_nway_reset [2022-11-23 15:27:24,720 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2022-11-23 15:27:24,720 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2022-11-23 15:27:24,721 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-11-23 15:27:24,721 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-11-23 15:27:24,721 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2022-11-23 15:27:24,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2022-11-23 15:27:24,721 INFO L130 BoogieDeclarations]: Found specification of procedure cas_setup_multicast [2022-11-23 15:27:24,722 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_setup_multicast [2022-11-23 15:27:24,722 INFO L130 BoogieDeclarations]: Found specification of procedure cas_phy_powerdown [2022-11-23 15:27:24,722 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_phy_powerdown [2022-11-23 15:27:24,722 INFO L130 BoogieDeclarations]: Found specification of procedure cas_post_rxds_ringN [2022-11-23 15:27:24,722 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_post_rxds_ringN [2022-11-23 15:27:24,722 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_irq [2022-11-23 15:27:24,723 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_irq [2022-11-23 15:27:24,723 INFO L130 BoogieDeclarations]: Found specification of procedure cas_vpd_match [2022-11-23 15:27:24,723 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_vpd_match [2022-11-23 15:27:24,723 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_83 [2022-11-23 15:27:24,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_83 [2022-11-23 15:27:24,724 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_81 [2022-11-23 15:27:24,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_81 [2022-11-23 15:27:24,724 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2022-11-23 15:27:24,724 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2022-11-23 15:27:24,724 INFO L130 BoogieDeclarations]: Found specification of procedure cpumask_weight [2022-11-23 15:27:24,725 INFO L138 BoogieDeclarations]: Found implementation of procedure cpumask_weight [2022-11-23 15:27:24,725 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2022-11-23 15:27:24,725 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2022-11-23 15:27:24,725 INFO L130 BoogieDeclarations]: Found specification of procedure page_count [2022-11-23 15:27:24,725 INFO L138 BoogieDeclarations]: Found implementation of procedure page_count [2022-11-23 15:27:24,725 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2022-11-23 15:27:24,726 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2022-11-23 15:27:24,726 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_77 [2022-11-23 15:27:24,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_77 [2022-11-23 15:27:24,726 INFO L130 BoogieDeclarations]: Found specification of procedure cas_shutdown [2022-11-23 15:27:24,726 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_shutdown [2022-11-23 15:27:24,727 INFO L130 BoogieDeclarations]: Found specification of procedure cas_begin_auto_negotiation [2022-11-23 15:27:24,727 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_begin_auto_negotiation [2022-11-23 15:27:24,727 INFO L130 BoogieDeclarations]: Found specification of procedure skb_frag_page [2022-11-23 15:27:24,727 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_frag_page [2022-11-23 15:27:24,727 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-11-23 15:27:24,728 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-11-23 15:27:24,728 INFO L130 BoogieDeclarations]: Found specification of procedure cas_write_txd [2022-11-23 15:27:24,728 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_write_txd [2022-11-23 15:27:24,728 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-23 15:27:24,728 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-23 15:27:24,729 INFO L130 BoogieDeclarations]: Found specification of procedure __skb_frag_ref [2022-11-23 15:27:24,729 INFO L138 BoogieDeclarations]: Found implementation of procedure __skb_frag_ref [2022-11-23 15:27:24,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 15:27:24,729 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-23 15:27:24,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-23 15:27:24,729 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_82 [2022-11-23 15:27:24,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_82 [2022-11-23 15:27:24,730 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_84 [2022-11-23 15:27:24,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_84 [2022-11-23 15:27:24,730 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_79 [2022-11-23 15:27:24,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_79 [2022-11-23 15:27:24,731 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_inc [2022-11-23 15:27:24,731 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_inc [2022-11-23 15:27:24,731 INFO L130 BoogieDeclarations]: Found specification of procedure cas_init_hw [2022-11-23 15:27:24,731 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_init_hw [2022-11-23 15:27:24,731 INFO L130 BoogieDeclarations]: Found specification of procedure cas_clean_rings [2022-11-23 15:27:24,732 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_clean_rings [2022-11-23 15:27:24,732 INFO L130 BoogieDeclarations]: Found specification of procedure cas_page_free [2022-11-23 15:27:24,732 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_page_free [2022-11-23 15:27:24,732 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec [2022-11-23 15:27:24,732 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec [2022-11-23 15:27:24,732 INFO L130 BoogieDeclarations]: Found specification of procedure cas_phy_write [2022-11-23 15:27:24,733 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_phy_write [2022-11-23 15:27:24,733 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2022-11-23 15:27:24,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2022-11-23 15:27:24,733 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_work [2022-11-23 15:27:24,733 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_work [2022-11-23 15:27:24,734 INFO L130 BoogieDeclarations]: Found specification of procedure pci_iounmap [2022-11-23 15:27:24,734 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_iounmap [2022-11-23 15:27:24,734 INFO L130 BoogieDeclarations]: Found specification of procedure cas_spare_recover [2022-11-23 15:27:24,734 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_spare_recover [2022-11-23 15:27:24,734 INFO L130 BoogieDeclarations]: Found specification of procedure ethtool_cmd_speed [2022-11-23 15:27:24,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ethtool_cmd_speed [2022-11-23 15:27:24,735 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2022-11-23 15:27:24,735 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2022-11-23 15:27:24,735 INFO L130 BoogieDeclarations]: Found specification of procedure cas_get_stats [2022-11-23 15:27:24,735 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_get_stats [2022-11-23 15:27:24,735 INFO L130 BoogieDeclarations]: Found specification of procedure readl [2022-11-23 15:27:24,736 INFO L138 BoogieDeclarations]: Found implementation of procedure readl [2022-11-23 15:27:24,736 INFO L130 BoogieDeclarations]: Found specification of procedure __kunmap_atomic [2022-11-23 15:27:24,736 INFO L138 BoogieDeclarations]: Found implementation of procedure __kunmap_atomic [2022-11-23 15:27:24,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:27:24,736 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2022-11-23 15:27:24,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2022-11-23 15:27:24,737 INFO L130 BoogieDeclarations]: Found specification of procedure pci_dma_sync_single_for_device [2022-11-23 15:27:24,737 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_dma_sync_single_for_device [2022-11-23 15:27:24,737 INFO L130 BoogieDeclarations]: Found specification of procedure readb [2022-11-23 15:27:24,737 INFO L138 BoogieDeclarations]: Found implementation of procedure readb [2022-11-23 15:27:24,738 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_107 [2022-11-23 15:27:24,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_107 [2022-11-23 15:27:26,625 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:27:26,630 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:27:27,145 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-23 15:32:11,511 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:32:20,137 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:32:20,139 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-23 15:32:20,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:32:20 BoogieIcfgContainer [2022-11-23 15:32:20,158 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:32:20,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:32:20,164 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:32:20,168 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:32:20,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:27:15" (1/3) ... [2022-11-23 15:32:20,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@635e6f18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:32:20, skipping insertion in model container [2022-11-23 15:32:20,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:23" (2/3) ... [2022-11-23 15:32:20,171 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@635e6f18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:32:20, skipping insertion in model container [2022-11-23 15:32:20,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:32:20" (3/3) ... [2022-11-23 15:32:20,173 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-sun-cassini.cil.i [2022-11-23 15:32:20,199 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:32:20,199 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-11-23 15:32:20,336 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:32:20,343 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7839e988, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:32:20,343 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-23 15:32:20,359 INFO L276 IsEmpty]: Start isEmpty. Operand has 2825 states, 1584 states have (on average 1.2613636363636365) internal successors, (1998), 1665 states have internal predecessors, (1998), 1066 states have call successors, (1066), 173 states have call predecessors, (1066), 172 states have return successors, (1062), 1048 states have call predecessors, (1062), 1062 states have call successors, (1062) [2022-11-23 15:32:20,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-23 15:32:20,370 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:32:20,371 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-23 15:32:20,371 INFO L420 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)] === [2022-11-23 15:32:20,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:32:20,377 INFO L85 PathProgramCache]: Analyzing trace with hash -506179761, now seen corresponding path program 1 times [2022-11-23 15:32:20,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:32:20,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046319846] [2022-11-23 15:32:20,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:32:20,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:32:21,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:32:23,399 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 15:32:23,399 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:32:23,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046319846] [2022-11-23 15:32:23,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046319846] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:32:23,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:32:23,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:32:23,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247637255] [2022-11-23 15:32:23,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:32:23,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:32:23,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:32:23,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:32:23,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:32:23,472 INFO L87 Difference]: Start difference. First operand has 2825 states, 1584 states have (on average 1.2613636363636365) internal successors, (1998), 1665 states have internal predecessors, (1998), 1066 states have call successors, (1066), 173 states have call predecessors, (1066), 172 states have return successors, (1062), 1048 states have call predecessors, (1062), 1062 states have call successors, (1062) Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-23 15:32:25,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:32:38,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:32:38,007 INFO L93 Difference]: Finished difference Result 7966 states and 12094 transitions. [2022-11-23 15:32:38,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:32:38,010 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 35 [2022-11-23 15:32:38,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:32:38,093 INFO L225 Difference]: With dead ends: 7966 [2022-11-23 15:32:38,093 INFO L226 Difference]: Without dead ends: 5144 [2022-11-23 15:32:38,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:32:38,140 INFO L413 NwaCegarLoop]: 4703 mSDtfsCounter, 3948 mSDsluCounter, 12642 mSDsCounter, 0 mSdLazyCounter, 1610 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3967 SdHoareTripleChecker+Valid, 17345 SdHoareTripleChecker+Invalid, 1614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1610 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.7s IncrementalHoareTripleChecker+Time [2022-11-23 15:32:38,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3967 Valid, 17345 Invalid, 1614 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 1610 Invalid, 1 Unknown, 0 Unchecked, 13.7s Time] [2022-11-23 15:32:38,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5144 states. [2022-11-23 15:32:38,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5144 to 5136. [2022-11-23 15:32:38,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5136 states, 2870 states have (on average 1.2571428571428571) internal successors, (3608), 3025 states have internal predecessors, (3608), 1936 states have call successors, (1936), 336 states have call predecessors, (1936), 327 states have return successors, (2014), 1881 states have call predecessors, (2014), 1930 states have call successors, (2014) [2022-11-23 15:32:38,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5136 states to 5136 states and 7558 transitions. [2022-11-23 15:32:38,764 INFO L78 Accepts]: Start accepts. Automaton has 5136 states and 7558 transitions. Word has length 35 [2022-11-23 15:32:38,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:32:38,764 INFO L495 AbstractCegarLoop]: Abstraction has 5136 states and 7558 transitions. [2022-11-23 15:32:38,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-23 15:32:38,765 INFO L276 IsEmpty]: Start isEmpty. Operand 5136 states and 7558 transitions. [2022-11-23 15:32:38,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-23 15:32:38,769 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:32:38,770 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-23 15:32:38,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:32:38,770 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 15:32:38,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:32:38,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1876656955, now seen corresponding path program 1 times [2022-11-23 15:32:38,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:32:38,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526819408] [2022-11-23 15:32:38,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:32:38,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:32:39,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:32:40,938 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 15:32:40,938 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:32:40,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526819408] [2022-11-23 15:32:40,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526819408] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:32:40,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:32:40,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:32:40,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686516041] [2022-11-23 15:32:40,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:32:40,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:32:40,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:32:40,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:32:40,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:32:40,942 INFO L87 Difference]: Start difference. First operand 5136 states and 7558 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 15:32:43,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:32:53,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:32:53,388 INFO L93 Difference]: Finished difference Result 5146 states and 7567 transitions. [2022-11-23 15:32:53,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:32:53,390 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 41 [2022-11-23 15:32:53,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:32:53,445 INFO L225 Difference]: With dead ends: 5146 [2022-11-23 15:32:53,445 INFO L226 Difference]: Without dead ends: 5144 [2022-11-23 15:32:53,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:32:53,452 INFO L413 NwaCegarLoop]: 3709 mSDtfsCounter, 4073 mSDsluCounter, 7392 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4090 SdHoareTripleChecker+Valid, 11101 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.9s IncrementalHoareTripleChecker+Time [2022-11-23 15:32:53,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4090 Valid, 11101 Invalid, 1204 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 1202 Invalid, 1 Unknown, 0 Unchecked, 11.9s Time] [2022-11-23 15:32:53,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5144 states. [2022-11-23 15:32:53,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5144 to 5144. [2022-11-23 15:32:53,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5144 states, 2876 states have (on average 1.256606397774687) internal successors, (3614), 3031 states have internal predecessors, (3614), 1936 states have call successors, (1936), 338 states have call predecessors, (1936), 329 states have return successors, (2014), 1881 states have call predecessors, (2014), 1930 states have call successors, (2014) [2022-11-23 15:32:53,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5144 states to 5144 states and 7564 transitions. [2022-11-23 15:32:53,908 INFO L78 Accepts]: Start accepts. Automaton has 5144 states and 7564 transitions. Word has length 41 [2022-11-23 15:32:53,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:32:53,909 INFO L495 AbstractCegarLoop]: Abstraction has 5144 states and 7564 transitions. [2022-11-23 15:32:53,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 15:32:53,910 INFO L276 IsEmpty]: Start isEmpty. Operand 5144 states and 7564 transitions. [2022-11-23 15:32:53,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-23 15:32:53,926 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:32:53,926 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-23 15:32:53,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 15:32:53,927 INFO L420 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)] === [2022-11-23 15:32:53,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:32:53,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1839038960, now seen corresponding path program 1 times [2022-11-23 15:32:53,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:32:53,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897021740] [2022-11-23 15:32:53,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:32:53,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:32:54,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:32:55,725 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-23 15:32:55,726 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:32:55,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897021740] [2022-11-23 15:32:55,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897021740] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:32:55,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:32:55,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:32:55,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634770723] [2022-11-23 15:32:55,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:32:55,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:32:55,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:32:55,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:32:55,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:32:55,728 INFO L87 Difference]: Start difference. First operand 5144 states and 7564 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 15:32:57,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:33:07,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:33:07,111 INFO L93 Difference]: Finished difference Result 5154 states and 7573 transitions. [2022-11-23 15:33:07,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:33:07,115 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 46 [2022-11-23 15:33:07,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:33:07,172 INFO L225 Difference]: With dead ends: 5154 [2022-11-23 15:33:07,172 INFO L226 Difference]: Without dead ends: 5152 [2022-11-23 15:33:07,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:33:07,183 INFO L413 NwaCegarLoop]: 3709 mSDtfsCounter, 4073 mSDsluCounter, 7392 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4089 SdHoareTripleChecker+Valid, 11101 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2022-11-23 15:33:07,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4089 Valid, 11101 Invalid, 1204 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 1202 Invalid, 1 Unknown, 0 Unchecked, 10.9s Time] [2022-11-23 15:33:07,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5152 states. [2022-11-23 15:33:07,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5152 to 5152. [2022-11-23 15:33:07,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5152 states, 2882 states have (on average 1.2560721721027064) internal successors, (3620), 3037 states have internal predecessors, (3620), 1936 states have call successors, (1936), 340 states have call predecessors, (1936), 331 states have return successors, (2014), 1881 states have call predecessors, (2014), 1930 states have call successors, (2014) [2022-11-23 15:33:07,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5152 states to 5152 states and 7570 transitions. [2022-11-23 15:33:07,676 INFO L78 Accepts]: Start accepts. Automaton has 5152 states and 7570 transitions. Word has length 46 [2022-11-23 15:33:07,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:33:07,677 INFO L495 AbstractCegarLoop]: Abstraction has 5152 states and 7570 transitions. [2022-11-23 15:33:07,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 15:33:07,677 INFO L276 IsEmpty]: Start isEmpty. Operand 5152 states and 7570 transitions. [2022-11-23 15:33:07,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-23 15:33:07,683 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:33:07,684 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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] [2022-11-23 15:33:07,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 15:33:07,684 INFO L420 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)] === [2022-11-23 15:33:07,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:33:07,685 INFO L85 PathProgramCache]: Analyzing trace with hash -806884506, now seen corresponding path program 1 times [2022-11-23 15:33:07,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:33:07,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738026300] [2022-11-23 15:33:07,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:07,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:33:08,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:09,348 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-23 15:33:09,348 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:33:09,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738026300] [2022-11-23 15:33:09,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738026300] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:33:09,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:33:09,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:33:09,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852588292] [2022-11-23 15:33:09,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:33:09,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:33:09,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:33:09,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:33:09,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:33:09,351 INFO L87 Difference]: Start difference. First operand 5152 states and 7570 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-23 15:33:11,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:33:20,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:33:20,473 INFO L93 Difference]: Finished difference Result 5162 states and 7579 transitions. [2022-11-23 15:33:20,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:33:20,474 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 50 [2022-11-23 15:33:20,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:33:20,514 INFO L225 Difference]: With dead ends: 5162 [2022-11-23 15:33:20,514 INFO L226 Difference]: Without dead ends: 5160 [2022-11-23 15:33:20,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:33:20,520 INFO L413 NwaCegarLoop]: 3709 mSDtfsCounter, 4074 mSDsluCounter, 7392 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4089 SdHoareTripleChecker+Valid, 11101 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:33:20,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4089 Valid, 11101 Invalid, 1204 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 1202 Invalid, 1 Unknown, 0 Unchecked, 10.5s Time] [2022-11-23 15:33:20,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5160 states. [2022-11-23 15:33:21,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5160 to 5160. [2022-11-23 15:33:21,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5160 states, 2888 states have (on average 1.255540166204986) internal successors, (3626), 3043 states have internal predecessors, (3626), 1936 states have call successors, (1936), 342 states have call predecessors, (1936), 333 states have return successors, (2014), 1881 states have call predecessors, (2014), 1930 states have call successors, (2014) [2022-11-23 15:33:21,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5160 states to 5160 states and 7576 transitions. [2022-11-23 15:33:21,200 INFO L78 Accepts]: Start accepts. Automaton has 5160 states and 7576 transitions. Word has length 50 [2022-11-23 15:33:21,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:33:21,201 INFO L495 AbstractCegarLoop]: Abstraction has 5160 states and 7576 transitions. [2022-11-23 15:33:21,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-23 15:33:21,201 INFO L276 IsEmpty]: Start isEmpty. Operand 5160 states and 7576 transitions. [2022-11-23 15:33:21,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-23 15:33:21,208 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:33:21,208 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 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] [2022-11-23 15:33:21,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 15:33:21,208 INFO L420 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)] === [2022-11-23 15:33:21,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:33:21,209 INFO L85 PathProgramCache]: Analyzing trace with hash 2089433999, now seen corresponding path program 1 times [2022-11-23 15:33:21,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:33:21,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371010520] [2022-11-23 15:33:21,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:21,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:33:21,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:23,149 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-23 15:33:23,150 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:33:23,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371010520] [2022-11-23 15:33:23,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371010520] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:33:23,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:33:23,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:33:23,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503311530] [2022-11-23 15:33:23,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:33:23,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:33:23,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:33:23,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:33:23,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:33:23,152 INFO L87 Difference]: Start difference. First operand 5160 states and 7576 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-23 15:33:25,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:33:34,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:33:34,088 INFO L93 Difference]: Finished difference Result 5170 states and 7585 transitions. [2022-11-23 15:33:34,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:33:34,089 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 55 [2022-11-23 15:33:34,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:33:34,126 INFO L225 Difference]: With dead ends: 5170 [2022-11-23 15:33:34,126 INFO L226 Difference]: Without dead ends: 5168 [2022-11-23 15:33:34,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:33:34,131 INFO L413 NwaCegarLoop]: 3709 mSDtfsCounter, 4074 mSDsluCounter, 7392 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4088 SdHoareTripleChecker+Valid, 11101 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:33:34,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4088 Valid, 11101 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1202 Invalid, 1 Unknown, 0 Unchecked, 10.4s Time] [2022-11-23 15:33:34,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5168 states. [2022-11-23 15:33:34,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5168 to 5168. [2022-11-23 15:33:34,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5168 states, 2894 states have (on average 1.2550103662750518) internal successors, (3632), 3049 states have internal predecessors, (3632), 1936 states have call successors, (1936), 344 states have call predecessors, (1936), 335 states have return successors, (2014), 1881 states have call predecessors, (2014), 1930 states have call successors, (2014) [2022-11-23 15:33:34,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5168 states to 5168 states and 7582 transitions. [2022-11-23 15:33:34,631 INFO L78 Accepts]: Start accepts. Automaton has 5168 states and 7582 transitions. Word has length 55 [2022-11-23 15:33:34,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:33:34,631 INFO L495 AbstractCegarLoop]: Abstraction has 5168 states and 7582 transitions. [2022-11-23 15:33:34,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-23 15:33:34,632 INFO L276 IsEmpty]: Start isEmpty. Operand 5168 states and 7582 transitions. [2022-11-23 15:33:34,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-23 15:33:34,636 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:33:34,636 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 3, 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] [2022-11-23 15:33:34,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 15:33:34,637 INFO L420 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)] === [2022-11-23 15:33:34,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:33:34,638 INFO L85 PathProgramCache]: Analyzing trace with hash -2017017339, now seen corresponding path program 1 times [2022-11-23 15:33:34,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:33:34,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612613077] [2022-11-23 15:33:34,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:34,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:33:35,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:36,419 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-23 15:33:36,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:33:36,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612613077] [2022-11-23 15:33:36,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612613077] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:33:36,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:33:36,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:33:36,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799569275] [2022-11-23 15:33:36,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:33:36,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:33:36,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:33:36,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:33:36,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:33:36,421 INFO L87 Difference]: Start difference. First operand 5168 states and 7582 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-23 15:33:38,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:33:47,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:33:47,567 INFO L93 Difference]: Finished difference Result 5178 states and 7591 transitions. [2022-11-23 15:33:47,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:33:47,568 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 61 [2022-11-23 15:33:47,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:33:47,602 INFO L225 Difference]: With dead ends: 5178 [2022-11-23 15:33:47,602 INFO L226 Difference]: Without dead ends: 5176 [2022-11-23 15:33:47,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:33:47,607 INFO L413 NwaCegarLoop]: 3709 mSDtfsCounter, 4073 mSDsluCounter, 7392 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4086 SdHoareTripleChecker+Valid, 11101 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2022-11-23 15:33:47,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4086 Valid, 11101 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1202 Invalid, 1 Unknown, 0 Unchecked, 10.7s Time] [2022-11-23 15:33:47,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5176 states. [2022-11-23 15:33:48,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5176 to 5176. [2022-11-23 15:33:48,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5176 states, 2900 states have (on average 1.2544827586206897) internal successors, (3638), 3055 states have internal predecessors, (3638), 1936 states have call successors, (1936), 346 states have call predecessors, (1936), 337 states have return successors, (2014), 1881 states have call predecessors, (2014), 1930 states have call successors, (2014) [2022-11-23 15:33:48,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5176 states to 5176 states and 7588 transitions. [2022-11-23 15:33:48,133 INFO L78 Accepts]: Start accepts. Automaton has 5176 states and 7588 transitions. Word has length 61 [2022-11-23 15:33:48,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:33:48,133 INFO L495 AbstractCegarLoop]: Abstraction has 5176 states and 7588 transitions. [2022-11-23 15:33:48,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-23 15:33:48,134 INFO L276 IsEmpty]: Start isEmpty. Operand 5176 states and 7588 transitions. [2022-11-23 15:33:48,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-23 15:33:48,135 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:33:48,135 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 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] [2022-11-23 15:33:48,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 15:33:48,136 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 15:33:48,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:33:48,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1007542224, now seen corresponding path program 1 times [2022-11-23 15:33:48,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:33:48,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38792177] [2022-11-23 15:33:48,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:48,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:33:48,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:49,807 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-23 15:33:49,807 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:33:49,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38792177] [2022-11-23 15:33:49,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38792177] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:33:49,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:33:49,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:33:49,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96576302] [2022-11-23 15:33:49,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:33:49,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:33:49,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:33:49,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:33:49,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:33:49,809 INFO L87 Difference]: Start difference. First operand 5176 states and 7588 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 15:33:51,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:34:00,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:34:00,243 INFO L93 Difference]: Finished difference Result 5186 states and 7597 transitions. [2022-11-23 15:34:00,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:34:00,244 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 66 [2022-11-23 15:34:00,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:34:00,273 INFO L225 Difference]: With dead ends: 5186 [2022-11-23 15:34:00,273 INFO L226 Difference]: Without dead ends: 5184 [2022-11-23 15:34:00,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:34:00,277 INFO L413 NwaCegarLoop]: 3709 mSDtfsCounter, 4073 mSDsluCounter, 7392 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4085 SdHoareTripleChecker+Valid, 11101 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2022-11-23 15:34:00,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4085 Valid, 11101 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1202 Invalid, 1 Unknown, 0 Unchecked, 9.9s Time] [2022-11-23 15:34:00,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5184 states. [2022-11-23 15:34:00,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5184 to 5184. [2022-11-23 15:34:00,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5184 states, 2906 states have (on average 1.2539573296627666) internal successors, (3644), 3061 states have internal predecessors, (3644), 1936 states have call successors, (1936), 348 states have call predecessors, (1936), 339 states have return successors, (2014), 1881 states have call predecessors, (2014), 1930 states have call successors, (2014) [2022-11-23 15:34:00,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5184 states to 5184 states and 7594 transitions. [2022-11-23 15:34:00,778 INFO L78 Accepts]: Start accepts. Automaton has 5184 states and 7594 transitions. Word has length 66 [2022-11-23 15:34:00,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:34:00,778 INFO L495 AbstractCegarLoop]: Abstraction has 5184 states and 7594 transitions. [2022-11-23 15:34:00,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 15:34:00,779 INFO L276 IsEmpty]: Start isEmpty. Operand 5184 states and 7594 transitions. [2022-11-23 15:34:00,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-23 15:34:00,782 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:34:00,782 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 3, 3, 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] [2022-11-23 15:34:00,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 15:34:00,783 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 15:34:00,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:34:00,783 INFO L85 PathProgramCache]: Analyzing trace with hash -733940186, now seen corresponding path program 1 times [2022-11-23 15:34:00,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:34:00,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850555512] [2022-11-23 15:34:00,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:34:00,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:34:01,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:34:02,422 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-23 15:34:02,422 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:34:02,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850555512] [2022-11-23 15:34:02,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850555512] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:34:02,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:34:02,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:34:02,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102680429] [2022-11-23 15:34:02,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:34:02,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:34:02,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:34:02,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:34:02,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:34:02,424 INFO L87 Difference]: Start difference. First operand 5184 states and 7594 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-23 15:34:04,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:34:16,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:34:16,881 INFO L93 Difference]: Finished difference Result 7329 states and 10612 transitions. [2022-11-23 15:34:16,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:34:16,882 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 70 [2022-11-23 15:34:16,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:34:16,921 INFO L225 Difference]: With dead ends: 7329 [2022-11-23 15:34:16,921 INFO L226 Difference]: Without dead ends: 7327 [2022-11-23 15:34:16,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:34:16,926 INFO L413 NwaCegarLoop]: 5010 mSDtfsCounter, 3048 mSDsluCounter, 12327 mSDsCounter, 0 mSdLazyCounter, 1753 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3059 SdHoareTripleChecker+Valid, 17337 SdHoareTripleChecker+Invalid, 1756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1753 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.7s IncrementalHoareTripleChecker+Time [2022-11-23 15:34:16,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3059 Valid, 17337 Invalid, 1756 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 1753 Invalid, 1 Unknown, 0 Unchecked, 13.7s Time] [2022-11-23 15:34:16,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7327 states. [2022-11-23 15:34:17,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7327 to 7319. [2022-11-23 15:34:17,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7319 states, 4107 states have (on average 1.2434867299732164) internal successors, (5107), 4299 states have internal predecessors, (5107), 2677 states have call successors, (2677), 549 states have call predecessors, (2677), 532 states have return successors, (2819), 2608 states have call predecessors, (2819), 2671 states have call successors, (2819) [2022-11-23 15:34:17,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7319 states to 7319 states and 10603 transitions. [2022-11-23 15:34:17,698 INFO L78 Accepts]: Start accepts. Automaton has 7319 states and 10603 transitions. Word has length 70 [2022-11-23 15:34:17,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:34:17,699 INFO L495 AbstractCegarLoop]: Abstraction has 7319 states and 10603 transitions. [2022-11-23 15:34:17,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-23 15:34:17,700 INFO L276 IsEmpty]: Start isEmpty. Operand 7319 states and 10603 transitions. [2022-11-23 15:34:17,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-23 15:34:17,701 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:34:17,701 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 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] [2022-11-23 15:34:17,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 15:34:17,702 INFO L420 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)] === [2022-11-23 15:34:17,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:34:17,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1167013040, now seen corresponding path program 1 times [2022-11-23 15:34:17,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:34:17,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367790330] [2022-11-23 15:34:17,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:34:17,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:34:18,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:34:19,338 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-11-23 15:34:19,338 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:34:19,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367790330] [2022-11-23 15:34:19,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367790330] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:34:19,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:34:19,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:34:19,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209720424] [2022-11-23 15:34:19,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:34:19,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:34:19,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:34:19,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:34:19,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:34:19,341 INFO L87 Difference]: Start difference. First operand 7319 states and 10603 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-23 15:34:21,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:34:30,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:34:30,158 INFO L93 Difference]: Finished difference Result 7329 states and 10612 transitions. [2022-11-23 15:34:30,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:34:30,159 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 76 [2022-11-23 15:34:30,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:34:30,198 INFO L225 Difference]: With dead ends: 7329 [2022-11-23 15:34:30,198 INFO L226 Difference]: Without dead ends: 7327 [2022-11-23 15:34:30,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:34:30,203 INFO L413 NwaCegarLoop]: 3709 mSDtfsCounter, 4073 mSDsluCounter, 7392 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4083 SdHoareTripleChecker+Valid, 11101 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:34:30,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4083 Valid, 11101 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1202 Invalid, 1 Unknown, 0 Unchecked, 10.2s Time] [2022-11-23 15:34:30,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7327 states. [2022-11-23 15:34:30,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7327 to 7327. [2022-11-23 15:34:30,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7327 states, 4113 states have (on average 1.2431315341599805) internal successors, (5113), 4305 states have internal predecessors, (5113), 2677 states have call successors, (2677), 551 states have call predecessors, (2677), 534 states have return successors, (2819), 2608 states have call predecessors, (2819), 2671 states have call successors, (2819) [2022-11-23 15:34:30,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7327 states to 7327 states and 10609 transitions. [2022-11-23 15:34:30,996 INFO L78 Accepts]: Start accepts. Automaton has 7327 states and 10609 transitions. Word has length 76 [2022-11-23 15:34:30,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:34:30,997 INFO L495 AbstractCegarLoop]: Abstraction has 7327 states and 10609 transitions. [2022-11-23 15:34:30,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-23 15:34:30,998 INFO L276 IsEmpty]: Start isEmpty. Operand 7327 states and 10609 transitions. [2022-11-23 15:34:31,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-23 15:34:31,003 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:34:31,004 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 3, 3, 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] [2022-11-23 15:34:31,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 15:34:31,004 INFO L420 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)] === [2022-11-23 15:34:31,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:34:31,010 INFO L85 PathProgramCache]: Analyzing trace with hash 929804166, now seen corresponding path program 1 times [2022-11-23 15:34:31,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:34:31,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175786386] [2022-11-23 15:34:31,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:34:31,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:34:31,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:34:32,667 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-23 15:34:32,668 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:34:32,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175786386] [2022-11-23 15:34:32,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175786386] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:34:32,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:34:32,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:34:32,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843032464] [2022-11-23 15:34:32,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:34:32,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:34:32,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:34:32,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:34:32,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:34:32,670 INFO L87 Difference]: Start difference. First operand 7327 states and 10609 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-23 15:34:34,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:34:43,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:34:43,906 INFO L93 Difference]: Finished difference Result 7337 states and 10618 transitions. [2022-11-23 15:34:43,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:34:43,907 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 80 [2022-11-23 15:34:43,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:34:43,944 INFO L225 Difference]: With dead ends: 7337 [2022-11-23 15:34:43,945 INFO L226 Difference]: Without dead ends: 7335 [2022-11-23 15:34:43,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:34:43,950 INFO L413 NwaCegarLoop]: 3709 mSDtfsCounter, 4074 mSDsluCounter, 7392 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4083 SdHoareTripleChecker+Valid, 11101 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:34:43,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4083 Valid, 11101 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1202 Invalid, 1 Unknown, 0 Unchecked, 10.5s Time] [2022-11-23 15:34:43,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7335 states. [2022-11-23 15:34:44,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7335 to 7335. [2022-11-23 15:34:44,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7335 states, 4119 states have (on average 1.2427773731488225) internal successors, (5119), 4311 states have internal predecessors, (5119), 2677 states have call successors, (2677), 553 states have call predecessors, (2677), 536 states have return successors, (2819), 2608 states have call predecessors, (2819), 2671 states have call successors, (2819) [2022-11-23 15:34:44,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7335 states to 7335 states and 10615 transitions. [2022-11-23 15:34:44,770 INFO L78 Accepts]: Start accepts. Automaton has 7335 states and 10615 transitions. Word has length 80 [2022-11-23 15:34:44,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:34:44,770 INFO L495 AbstractCegarLoop]: Abstraction has 7335 states and 10615 transitions. [2022-11-23 15:34:44,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-23 15:34:44,771 INFO L276 IsEmpty]: Start isEmpty. Operand 7335 states and 10615 transitions. [2022-11-23 15:34:44,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-23 15:34:44,776 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:34:44,777 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 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] [2022-11-23 15:34:44,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 15:34:44,777 INFO L420 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)] === [2022-11-23 15:34:44,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:34:44,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1761238640, now seen corresponding path program 1 times [2022-11-23 15:34:44,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:34:44,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291628496] [2022-11-23 15:34:44,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:34:44,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:34:45,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:34:46,357 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2022-11-23 15:34:46,358 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:34:46,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291628496] [2022-11-23 15:34:46,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291628496] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:34:46,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:34:46,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:34:46,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708133203] [2022-11-23 15:34:46,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:34:46,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:34:46,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:34:46,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:34:46,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:34:46,360 INFO L87 Difference]: Start difference. First operand 7335 states and 10615 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-23 15:34:48,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:34:58,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:34:58,066 INFO L93 Difference]: Finished difference Result 7345 states and 10624 transitions. [2022-11-23 15:34:58,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:34:58,067 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 86 [2022-11-23 15:34:58,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:34:58,108 INFO L225 Difference]: With dead ends: 7345 [2022-11-23 15:34:58,108 INFO L226 Difference]: Without dead ends: 7343 [2022-11-23 15:34:58,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:34:58,116 INFO L413 NwaCegarLoop]: 3709 mSDtfsCounter, 4073 mSDsluCounter, 7392 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4081 SdHoareTripleChecker+Valid, 11101 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:34:58,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4081 Valid, 11101 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1202 Invalid, 1 Unknown, 0 Unchecked, 11.0s Time] [2022-11-23 15:34:58,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7343 states. [2022-11-23 15:34:59,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7343 to 7343. [2022-11-23 15:34:59,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7343 states, 4125 states have (on average 1.2424242424242424) internal successors, (5125), 4317 states have internal predecessors, (5125), 2677 states have call successors, (2677), 555 states have call predecessors, (2677), 538 states have return successors, (2819), 2608 states have call predecessors, (2819), 2671 states have call successors, (2819) [2022-11-23 15:34:59,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7343 states to 7343 states and 10621 transitions. [2022-11-23 15:34:59,127 INFO L78 Accepts]: Start accepts. Automaton has 7343 states and 10621 transitions. Word has length 86 [2022-11-23 15:34:59,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:34:59,128 INFO L495 AbstractCegarLoop]: Abstraction has 7343 states and 10621 transitions. [2022-11-23 15:34:59,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-23 15:34:59,128 INFO L276 IsEmpty]: Start isEmpty. Operand 7343 states and 10621 transitions. [2022-11-23 15:34:59,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-23 15:34:59,130 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:34:59,131 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 3, 3, 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] [2022-11-23 15:34:59,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 15:34:59,131 INFO L420 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)] === [2022-11-23 15:34:59,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:34:59,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1803018470, now seen corresponding path program 1 times [2022-11-23 15:34:59,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:34:59,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785325212] [2022-11-23 15:34:59,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:34:59,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:34:59,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:35:00,565 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-11-23 15:35:00,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:35:00,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785325212] [2022-11-23 15:35:00,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785325212] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:35:00,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:35:00,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:35:00,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760462859] [2022-11-23 15:35:00,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:35:00,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:35:00,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:35:00,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:35:00,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:35:00,568 INFO L87 Difference]: Start difference. First operand 7343 states and 10621 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 15:35:02,671 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:35:12,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:35:12,958 INFO L93 Difference]: Finished difference Result 7353 states and 10630 transitions. [2022-11-23 15:35:12,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:35:12,958 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 90 [2022-11-23 15:35:12,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:35:12,999 INFO L225 Difference]: With dead ends: 7353 [2022-11-23 15:35:12,999 INFO L226 Difference]: Without dead ends: 7351 [2022-11-23 15:35:13,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:35:13,007 INFO L413 NwaCegarLoop]: 3709 mSDtfsCounter, 4074 mSDsluCounter, 7392 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4081 SdHoareTripleChecker+Valid, 11101 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:35:13,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4081 Valid, 11101 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1202 Invalid, 1 Unknown, 0 Unchecked, 11.5s Time] [2022-11-23 15:35:13,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7351 states. [2022-11-23 15:35:13,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7351 to 7351. [2022-11-23 15:35:13,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7351 states, 4131 states have (on average 1.242072137496974) internal successors, (5131), 4323 states have internal predecessors, (5131), 2677 states have call successors, (2677), 557 states have call predecessors, (2677), 540 states have return successors, (2819), 2608 states have call predecessors, (2819), 2671 states have call successors, (2819) [2022-11-23 15:35:13,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7351 states to 7351 states and 10627 transitions. [2022-11-23 15:35:13,838 INFO L78 Accepts]: Start accepts. Automaton has 7351 states and 10627 transitions. Word has length 90 [2022-11-23 15:35:13,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:35:13,839 INFO L495 AbstractCegarLoop]: Abstraction has 7351 states and 10627 transitions. [2022-11-23 15:35:13,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 15:35:13,839 INFO L276 IsEmpty]: Start isEmpty. Operand 7351 states and 10627 transitions. [2022-11-23 15:35:13,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-23 15:35:13,841 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:35:13,841 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 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] [2022-11-23 15:35:13,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 15:35:13,842 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 15:35:13,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:35:13,843 INFO L85 PathProgramCache]: Analyzing trace with hash -218945936, now seen corresponding path program 1 times [2022-11-23 15:35:13,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:35:13,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033031672] [2022-11-23 15:35:13,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:35:13,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:35:14,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:35:15,252 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-11-23 15:35:15,253 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:35:15,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033031672] [2022-11-23 15:35:15,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033031672] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:35:15,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:35:15,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:35:15,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291836387] [2022-11-23 15:35:15,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:35:15,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:35:15,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:35:15,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:35:15,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:35:15,255 INFO L87 Difference]: Start difference. First operand 7351 states and 10627 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-23 15:35:17,381 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:35:27,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:35:27,547 INFO L93 Difference]: Finished difference Result 7481 states and 10745 transitions. [2022-11-23 15:35:27,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:35:27,547 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 96 [2022-11-23 15:35:27,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:35:27,573 INFO L225 Difference]: With dead ends: 7481 [2022-11-23 15:35:27,573 INFO L226 Difference]: Without dead ends: 7479 [2022-11-23 15:35:27,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:35:27,576 INFO L413 NwaCegarLoop]: 3731 mSDtfsCounter, 4037 mSDsluCounter, 7498 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4043 SdHoareTripleChecker+Valid, 11229 SdHoareTripleChecker+Invalid, 1215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:35:27,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4043 Valid, 11229 Invalid, 1215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1212 Invalid, 1 Unknown, 0 Unchecked, 11.4s Time] [2022-11-23 15:35:27,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7479 states. [2022-11-23 15:35:28,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7479 to 7477. [2022-11-23 15:35:28,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7477 states, 4207 states have (on average 1.2400760637033517) internal successors, (5217), 4401 states have internal predecessors, (5217), 2691 states have call successors, (2691), 593 states have call predecessors, (2691), 576 states have return successors, (2833), 2622 states have call predecessors, (2833), 2685 states have call successors, (2833) [2022-11-23 15:35:28,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7477 states to 7477 states and 10741 transitions. [2022-11-23 15:35:28,350 INFO L78 Accepts]: Start accepts. Automaton has 7477 states and 10741 transitions. Word has length 96 [2022-11-23 15:35:28,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:35:28,351 INFO L495 AbstractCegarLoop]: Abstraction has 7477 states and 10741 transitions. [2022-11-23 15:35:28,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-23 15:35:28,351 INFO L276 IsEmpty]: Start isEmpty. Operand 7477 states and 10741 transitions. [2022-11-23 15:35:28,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-23 15:35:28,354 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:35:28,354 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 4, 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] [2022-11-23 15:35:28,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 15:35:28,355 INFO L420 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)] === [2022-11-23 15:35:28,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:35:28,355 INFO L85 PathProgramCache]: Analyzing trace with hash -652150470, now seen corresponding path program 1 times [2022-11-23 15:35:28,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:35:28,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396147375] [2022-11-23 15:35:28,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:35:28,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:35:28,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:35:31,039 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-11-23 15:35:31,040 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:35:31,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396147375] [2022-11-23 15:35:31,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396147375] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:35:31,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:35:31,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:35:31,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674127434] [2022-11-23 15:35:31,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:35:31,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:35:31,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:35:31,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:35:31,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:35:31,042 INFO L87 Difference]: Start difference. First operand 7477 states and 10741 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-23 15:35:33,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:35:48,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:35:48,377 INFO L93 Difference]: Finished difference Result 7495 states and 10756 transitions. [2022-11-23 15:35:48,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:35:48,377 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 114 [2022-11-23 15:35:48,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:35:48,399 INFO L225 Difference]: With dead ends: 7495 [2022-11-23 15:35:48,399 INFO L226 Difference]: Without dead ends: 7493 [2022-11-23 15:35:48,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:35:48,403 INFO L413 NwaCegarLoop]: 5009 mSDtfsCounter, 3038 mSDsluCounter, 12343 mSDsCounter, 0 mSdLazyCounter, 1743 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3043 SdHoareTripleChecker+Valid, 17352 SdHoareTripleChecker+Invalid, 1746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1743 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:35:48,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3043 Valid, 17352 Invalid, 1746 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 1743 Invalid, 1 Unknown, 0 Unchecked, 16.3s Time] [2022-11-23 15:35:48,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7493 states. [2022-11-23 15:35:49,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7493 to 7485. [2022-11-23 15:35:49,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7485 states, 4213 states have (on average 1.2397341561832425) internal successors, (5223), 4407 states have internal predecessors, (5223), 2691 states have call successors, (2691), 595 states have call predecessors, (2691), 578 states have return successors, (2833), 2622 states have call predecessors, (2833), 2685 states have call successors, (2833) [2022-11-23 15:35:49,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7485 states to 7485 states and 10747 transitions. [2022-11-23 15:35:49,284 INFO L78 Accepts]: Start accepts. Automaton has 7485 states and 10747 transitions. Word has length 114 [2022-11-23 15:35:49,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:35:49,285 INFO L495 AbstractCegarLoop]: Abstraction has 7485 states and 10747 transitions. [2022-11-23 15:35:49,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-23 15:35:49,286 INFO L276 IsEmpty]: Start isEmpty. Operand 7485 states and 10747 transitions. [2022-11-23 15:35:49,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-23 15:35:49,288 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:35:49,289 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 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] [2022-11-23 15:35:49,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-23 15:35:49,289 INFO L420 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)] === [2022-11-23 15:35:49,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:35:49,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1091597754, now seen corresponding path program 1 times [2022-11-23 15:35:49,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:35:49,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590387473] [2022-11-23 15:35:49,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:35:49,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:35:49,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:35:50,669 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2022-11-23 15:35:50,669 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:35:50,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590387473] [2022-11-23 15:35:50,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590387473] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:35:50,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:35:50,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:35:50,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401185437] [2022-11-23 15:35:50,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:35:50,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:35:50,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:35:50,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:35:50,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:35:50,671 INFO L87 Difference]: Start difference. First operand 7485 states and 10747 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-23 15:35:52,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:36:03,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:36:03,685 INFO L93 Difference]: Finished difference Result 7561 states and 10799 transitions. [2022-11-23 15:36:03,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:36:03,686 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 100 [2022-11-23 15:36:03,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:36:03,713 INFO L225 Difference]: With dead ends: 7561 [2022-11-23 15:36:03,713 INFO L226 Difference]: Without dead ends: 7559 [2022-11-23 15:36:03,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:36:03,719 INFO L413 NwaCegarLoop]: 3714 mSDtfsCounter, 4019 mSDsluCounter, 7482 mSDsCounter, 0 mSdLazyCounter, 1220 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4024 SdHoareTripleChecker+Valid, 11196 SdHoareTripleChecker+Invalid, 1223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1220 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:36:03,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4024 Valid, 11196 Invalid, 1223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1220 Invalid, 1 Unknown, 0 Unchecked, 12.1s Time] [2022-11-23 15:36:03,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7559 states. [2022-11-23 15:36:04,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7559 to 7557. [2022-11-23 15:36:04,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7557 states, 4257 states have (on average 1.2381959126145172) internal successors, (5271), 4451 states have internal predecessors, (5271), 2691 states have call successors, (2691), 623 states have call predecessors, (2691), 606 states have return successors, (2833), 2622 states have call predecessors, (2833), 2685 states have call successors, (2833) [2022-11-23 15:36:04,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7557 states to 7557 states and 10795 transitions. [2022-11-23 15:36:04,515 INFO L78 Accepts]: Start accepts. Automaton has 7557 states and 10795 transitions. Word has length 100 [2022-11-23 15:36:04,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:36:04,516 INFO L495 AbstractCegarLoop]: Abstraction has 7557 states and 10795 transitions. [2022-11-23 15:36:04,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-23 15:36:04,516 INFO L276 IsEmpty]: Start isEmpty. Operand 7557 states and 10795 transitions. [2022-11-23 15:36:04,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-23 15:36:04,518 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:36:04,518 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 3, 3, 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] [2022-11-23 15:36:04,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-23 15:36:04,519 INFO L420 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)] === [2022-11-23 15:36:04,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:36:04,519 INFO L85 PathProgramCache]: Analyzing trace with hash -151661009, now seen corresponding path program 1 times [2022-11-23 15:36:04,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:36:04,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109873806] [2022-11-23 15:36:04,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:36:04,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:36:04,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:36:05,806 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 375 trivial. 0 not checked. [2022-11-23 15:36:05,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:36:05,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109873806] [2022-11-23 15:36:05,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109873806] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:36:05,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:36:05,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:36:05,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048298444] [2022-11-23 15:36:05,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:36:05,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:36:05,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:36:05,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:36:05,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:36:05,808 INFO L87 Difference]: Start difference. First operand 7557 states and 10795 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-23 15:36:07,933 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:36:17,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:36:17,815 INFO L93 Difference]: Finished difference Result 7567 states and 10804 transitions. [2022-11-23 15:36:17,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:36:17,815 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 105 [2022-11-23 15:36:17,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:36:17,837 INFO L225 Difference]: With dead ends: 7567 [2022-11-23 15:36:17,837 INFO L226 Difference]: Without dead ends: 7565 [2022-11-23 15:36:17,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:36:17,840 INFO L413 NwaCegarLoop]: 3709 mSDtfsCounter, 4074 mSDsluCounter, 7392 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4078 SdHoareTripleChecker+Valid, 11101 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:36:17,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4078 Valid, 11101 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1202 Invalid, 1 Unknown, 0 Unchecked, 11.0s Time] [2022-11-23 15:36:17,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7565 states. [2022-11-23 15:36:18,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7565 to 7565. [2022-11-23 15:36:18,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7565 states, 4263 states have (on average 1.2378606615059817) internal successors, (5277), 4457 states have internal predecessors, (5277), 2691 states have call successors, (2691), 625 states have call predecessors, (2691), 608 states have return successors, (2833), 2622 states have call predecessors, (2833), 2685 states have call successors, (2833) [2022-11-23 15:36:18,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7565 states to 7565 states and 10801 transitions. [2022-11-23 15:36:18,497 INFO L78 Accepts]: Start accepts. Automaton has 7565 states and 10801 transitions. Word has length 105 [2022-11-23 15:36:18,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:36:18,498 INFO L495 AbstractCegarLoop]: Abstraction has 7565 states and 10801 transitions. [2022-11-23 15:36:18,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-23 15:36:18,498 INFO L276 IsEmpty]: Start isEmpty. Operand 7565 states and 10801 transitions. [2022-11-23 15:36:18,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-23 15:36:18,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:36:18,501 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 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] [2022-11-23 15:36:18,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-23 15:36:18,502 INFO L420 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)] === [2022-11-23 15:36:18,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:36:18,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1541188518, now seen corresponding path program 1 times [2022-11-23 15:36:18,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:36:18,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673728015] [2022-11-23 15:36:18,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:36:18,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:36:18,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:36:19,754 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 431 trivial. 0 not checked. [2022-11-23 15:36:19,755 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:36:19,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673728015] [2022-11-23 15:36:19,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673728015] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:36:19,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:36:19,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:36:19,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223244336] [2022-11-23 15:36:19,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:36:19,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:36:19,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:36:19,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:36:19,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:36:19,757 INFO L87 Difference]: Start difference. First operand 7565 states and 10801 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-23 15:36:21,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:36:31,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:36:31,492 INFO L93 Difference]: Finished difference Result 7575 states and 10810 transitions. [2022-11-23 15:36:31,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:36:31,495 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 110 [2022-11-23 15:36:31,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:36:31,524 INFO L225 Difference]: With dead ends: 7575 [2022-11-23 15:36:31,524 INFO L226 Difference]: Without dead ends: 7573 [2022-11-23 15:36:31,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:36:31,529 INFO L413 NwaCegarLoop]: 3709 mSDtfsCounter, 4074 mSDsluCounter, 7392 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4077 SdHoareTripleChecker+Valid, 11101 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2022-11-23 15:36:31,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4077 Valid, 11101 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1202 Invalid, 1 Unknown, 0 Unchecked, 10.8s Time] [2022-11-23 15:36:31,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7573 states. [2022-11-23 15:36:32,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7573 to 7573. [2022-11-23 15:36:32,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7573 states, 4269 states have (on average 1.2375263527758258) internal successors, (5283), 4463 states have internal predecessors, (5283), 2691 states have call successors, (2691), 627 states have call predecessors, (2691), 610 states have return successors, (2833), 2622 states have call predecessors, (2833), 2685 states have call successors, (2833) [2022-11-23 15:36:32,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7573 states to 7573 states and 10807 transitions. [2022-11-23 15:36:32,261 INFO L78 Accepts]: Start accepts. Automaton has 7573 states and 10807 transitions. Word has length 110 [2022-11-23 15:36:32,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:36:32,262 INFO L495 AbstractCegarLoop]: Abstraction has 7573 states and 10807 transitions. [2022-11-23 15:36:32,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-23 15:36:32,262 INFO L276 IsEmpty]: Start isEmpty. Operand 7573 states and 10807 transitions. [2022-11-23 15:36:32,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-23 15:36:32,264 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:36:32,264 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 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] [2022-11-23 15:36:32,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-23 15:36:32,265 INFO L420 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)] === [2022-11-23 15:36:32,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:36:32,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1512095823, now seen corresponding path program 1 times [2022-11-23 15:36:32,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:36:32,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680118578] [2022-11-23 15:36:32,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:36:32,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:36:32,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:36:33,278 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 491 trivial. 0 not checked. [2022-11-23 15:36:33,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:36:33,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680118578] [2022-11-23 15:36:33,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680118578] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:36:33,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:36:33,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:36:33,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702759514] [2022-11-23 15:36:33,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:36:33,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:36:33,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:36:33,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:36:33,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:36:33,282 INFO L87 Difference]: Start difference. First operand 7573 states and 10807 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-23 15:36:35,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:36:44,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:36:44,797 INFO L93 Difference]: Finished difference Result 7583 states and 10816 transitions. [2022-11-23 15:36:44,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:36:44,798 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 115 [2022-11-23 15:36:44,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:36:44,832 INFO L225 Difference]: With dead ends: 7583 [2022-11-23 15:36:44,832 INFO L226 Difference]: Without dead ends: 7581 [2022-11-23 15:36:44,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:36:44,838 INFO L413 NwaCegarLoop]: 3709 mSDtfsCounter, 4074 mSDsluCounter, 7392 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4076 SdHoareTripleChecker+Valid, 11101 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:36:44,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4076 Valid, 11101 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1202 Invalid, 1 Unknown, 0 Unchecked, 10.5s Time] [2022-11-23 15:36:44,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7581 states. [2022-11-23 15:36:45,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7581 to 7581. [2022-11-23 15:36:45,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7581 states, 4275 states have (on average 1.2371929824561403) internal successors, (5289), 4469 states have internal predecessors, (5289), 2691 states have call successors, (2691), 629 states have call predecessors, (2691), 612 states have return successors, (2833), 2622 states have call predecessors, (2833), 2685 states have call successors, (2833) [2022-11-23 15:36:45,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7581 states to 7581 states and 10813 transitions. [2022-11-23 15:36:45,543 INFO L78 Accepts]: Start accepts. Automaton has 7581 states and 10813 transitions. Word has length 115 [2022-11-23 15:36:45,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:36:45,543 INFO L495 AbstractCegarLoop]: Abstraction has 7581 states and 10813 transitions. [2022-11-23 15:36:45,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-23 15:36:45,544 INFO L276 IsEmpty]: Start isEmpty. Operand 7581 states and 10813 transitions. [2022-11-23 15:36:45,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-23 15:36:45,545 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:36:45,546 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-23 15:36:45,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-23 15:36:45,546 INFO L420 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)] === [2022-11-23 15:36:45,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:36:45,547 INFO L85 PathProgramCache]: Analyzing trace with hash 2004083255, now seen corresponding path program 1 times [2022-11-23 15:36:45,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:36:45,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325141508] [2022-11-23 15:36:45,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:36:45,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:36:45,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:36:47,549 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2022-11-23 15:36:47,549 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:36:47,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325141508] [2022-11-23 15:36:47,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325141508] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:36:47,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:36:47,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:36:47,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733248915] [2022-11-23 15:36:47,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:36:47,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:36:47,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:36:47,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:36:47,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:36:47,551 INFO L87 Difference]: Start difference. First operand 7581 states and 10813 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-23 15:36:49,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:37:02,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:37:02,577 INFO L93 Difference]: Finished difference Result 7601 states and 10829 transitions. [2022-11-23 15:37:02,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:37:02,578 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 137 [2022-11-23 15:37:02,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:37:02,605 INFO L225 Difference]: With dead ends: 7601 [2022-11-23 15:37:02,605 INFO L226 Difference]: Without dead ends: 7599 [2022-11-23 15:37:02,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:37:02,610 INFO L413 NwaCegarLoop]: 4730 mSDtfsCounter, 3912 mSDsluCounter, 12690 mSDsCounter, 0 mSdLazyCounter, 1606 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3917 SdHoareTripleChecker+Valid, 17420 SdHoareTripleChecker+Invalid, 1610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1606 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time [2022-11-23 15:37:02,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3917 Valid, 17420 Invalid, 1610 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 1606 Invalid, 1 Unknown, 0 Unchecked, 13.9s Time] [2022-11-23 15:37:02,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7599 states. [2022-11-23 15:37:03,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7599 to 7589. [2022-11-23 15:37:03,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7589 states, 4281 states have (on average 1.2368605466012614) internal successors, (5295), 4475 states have internal predecessors, (5295), 2691 states have call successors, (2691), 631 states have call predecessors, (2691), 614 states have return successors, (2833), 2622 states have call predecessors, (2833), 2685 states have call successors, (2833) [2022-11-23 15:37:03,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7589 states to 7589 states and 10819 transitions. [2022-11-23 15:37:03,361 INFO L78 Accepts]: Start accepts. Automaton has 7589 states and 10819 transitions. Word has length 137 [2022-11-23 15:37:03,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:37:03,362 INFO L495 AbstractCegarLoop]: Abstraction has 7589 states and 10819 transitions. [2022-11-23 15:37:03,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-23 15:37:03,362 INFO L276 IsEmpty]: Start isEmpty. Operand 7589 states and 10819 transitions. [2022-11-23 15:37:03,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-23 15:37:03,364 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:37:03,364 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 3, 3, 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] [2022-11-23 15:37:03,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-23 15:37:03,364 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 15:37:03,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:37:03,365 INFO L85 PathProgramCache]: Analyzing trace with hash 691753413, now seen corresponding path program 1 times [2022-11-23 15:37:03,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:37:03,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022930666] [2022-11-23 15:37:03,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:37:03,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:37:03,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:37:04,469 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-11-23 15:37:04,469 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:37:04,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022930666] [2022-11-23 15:37:04,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022930666] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:37:04,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:37:04,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:37:04,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270932931] [2022-11-23 15:37:04,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:37:04,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:37:04,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:37:04,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:37:04,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:37:04,471 INFO L87 Difference]: Start difference. First operand 7589 states and 10819 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-23 15:37:06,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:37:15,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:37:15,453 INFO L93 Difference]: Finished difference Result 7633 states and 10855 transitions. [2022-11-23 15:37:15,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:37:15,454 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 121 [2022-11-23 15:37:15,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:37:15,479 INFO L225 Difference]: With dead ends: 7633 [2022-11-23 15:37:15,479 INFO L226 Difference]: Without dead ends: 7629 [2022-11-23 15:37:15,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:37:15,485 INFO L413 NwaCegarLoop]: 3709 mSDtfsCounter, 4045 mSDsluCounter, 7422 mSDsCounter, 0 mSdLazyCounter, 1207 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4046 SdHoareTripleChecker+Valid, 11131 SdHoareTripleChecker+Invalid, 1210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1207 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:37:15,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4046 Valid, 11131 Invalid, 1210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1207 Invalid, 1 Unknown, 0 Unchecked, 10.0s Time] [2022-11-23 15:37:15,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7629 states. [2022-11-23 15:37:16,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7629 to 7627. [2022-11-23 15:37:16,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7627 states, 4308 states have (on average 1.2360724233983287) internal successors, (5325), 4501 states have internal predecessors, (5325), 2691 states have call successors, (2691), 643 states have call predecessors, (2691), 625 states have return successors, (2833), 2622 states have call predecessors, (2833), 2685 states have call successors, (2833) [2022-11-23 15:37:16,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7627 states to 7627 states and 10849 transitions. [2022-11-23 15:37:16,236 INFO L78 Accepts]: Start accepts. Automaton has 7627 states and 10849 transitions. Word has length 121 [2022-11-23 15:37:16,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:37:16,236 INFO L495 AbstractCegarLoop]: Abstraction has 7627 states and 10849 transitions. [2022-11-23 15:37:16,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-23 15:37:16,237 INFO L276 IsEmpty]: Start isEmpty. Operand 7627 states and 10849 transitions. [2022-11-23 15:37:16,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-23 15:37:16,239 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:37:16,239 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 3, 3, 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] [2022-11-23 15:37:16,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-23 15:37:16,240 INFO L420 AbstractCegarLoop]: === Iteration 21 === 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)] === [2022-11-23 15:37:16,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:37:16,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1323678448, now seen corresponding path program 1 times [2022-11-23 15:37:16,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:37:16,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183331320] [2022-11-23 15:37:16,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:37:16,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:37:16,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:37:17,410 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 623 trivial. 0 not checked. [2022-11-23 15:37:17,410 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:37:17,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183331320] [2022-11-23 15:37:17,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183331320] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:37:17,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:37:17,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:37:17,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47289877] [2022-11-23 15:37:17,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:37:17,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:37:17,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:37:17,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:37:17,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:37:17,413 INFO L87 Difference]: Start difference. First operand 7627 states and 10849 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-23 15:37:19,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:37:28,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:37:28,433 INFO L93 Difference]: Finished difference Result 7633 states and 10854 transitions. [2022-11-23 15:37:28,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:37:28,433 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 126 [2022-11-23 15:37:28,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:37:28,459 INFO L225 Difference]: With dead ends: 7633 [2022-11-23 15:37:28,460 INFO L226 Difference]: Without dead ends: 7429 [2022-11-23 15:37:28,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:37:28,464 INFO L413 NwaCegarLoop]: 3710 mSDtfsCounter, 4073 mSDsluCounter, 7394 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4073 SdHoareTripleChecker+Valid, 11104 SdHoareTripleChecker+Invalid, 1201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2022-11-23 15:37:28,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4073 Valid, 11104 Invalid, 1201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1199 Invalid, 1 Unknown, 0 Unchecked, 9.9s Time] [2022-11-23 15:37:28,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7429 states. [2022-11-23 15:37:29,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7429 to 7429. [2022-11-23 15:37:29,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7429 states, 4192 states have (on average 1.2416507633587786) internal successors, (5205), 4383 states have internal predecessors, (5205), 2645 states have call successors, (2645), 606 states have call predecessors, (2645), 589 states have return successors, (2790), 2579 states have call predecessors, (2790), 2642 states have call successors, (2790) [2022-11-23 15:37:29,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7429 states to 7429 states and 10640 transitions. [2022-11-23 15:37:29,251 INFO L78 Accepts]: Start accepts. Automaton has 7429 states and 10640 transitions. Word has length 126 [2022-11-23 15:37:29,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:37:29,251 INFO L495 AbstractCegarLoop]: Abstraction has 7429 states and 10640 transitions. [2022-11-23 15:37:29,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-23 15:37:29,252 INFO L276 IsEmpty]: Start isEmpty. Operand 7429 states and 10640 transitions. [2022-11-23 15:37:29,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-11-23 15:37:29,255 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:37:29,255 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-23 15:37:29,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-23 15:37:29,256 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_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)] === [2022-11-23 15:37:29,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:37:29,256 INFO L85 PathProgramCache]: Analyzing trace with hash 735451456, now seen corresponding path program 1 times [2022-11-23 15:37:29,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:37:29,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133812656] [2022-11-23 15:37:29,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:37:29,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:37:29,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:37:30,081 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2022-11-23 15:37:30,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:37:30,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133812656] [2022-11-23 15:37:30,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133812656] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:37:30,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:37:30,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:37:30,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770750934] [2022-11-23 15:37:30,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:37:30,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:37:30,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:37:30,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:37:30,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:37:30,084 INFO L87 Difference]: Start difference. First operand 7429 states and 10640 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-23 15:37:32,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:37:41,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:37:41,228 INFO L93 Difference]: Finished difference Result 14852 states and 21281 transitions. [2022-11-23 15:37:41,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:37:41,232 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 150 [2022-11-23 15:37:41,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:37:41,257 INFO L225 Difference]: With dead ends: 14852 [2022-11-23 15:37:41,257 INFO L226 Difference]: Without dead ends: 7437 [2022-11-23 15:37:41,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:37:41,294 INFO L413 NwaCegarLoop]: 3663 mSDtfsCounter, 10 mSDsluCounter, 7308 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 10971 SdHoareTripleChecker+Invalid, 1194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:37:41,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 10971 Invalid, 1194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1191 Invalid, 1 Unknown, 0 Unchecked, 10.1s Time] [2022-11-23 15:37:41,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7437 states. [2022-11-23 15:37:42,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7437 to 7433. [2022-11-23 15:37:42,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7433 states, 4194 states have (on average 1.2415355269432522) internal successors, (5207), 4387 states have internal predecessors, (5207), 2645 states have call successors, (2645), 606 states have call predecessors, (2645), 591 states have return successors, (2792), 2579 states have call predecessors, (2792), 2642 states have call successors, (2792) [2022-11-23 15:37:42,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7433 states to 7433 states and 10644 transitions. [2022-11-23 15:37:42,283 INFO L78 Accepts]: Start accepts. Automaton has 7433 states and 10644 transitions. Word has length 150 [2022-11-23 15:37:42,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:37:42,284 INFO L495 AbstractCegarLoop]: Abstraction has 7433 states and 10644 transitions. [2022-11-23 15:37:42,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-23 15:37:42,285 INFO L276 IsEmpty]: Start isEmpty. Operand 7433 states and 10644 transitions. [2022-11-23 15:37:42,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-11-23 15:37:42,287 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:37:42,288 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-23 15:37:42,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-23 15:37:42,288 INFO L420 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)] === [2022-11-23 15:37:42,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:37:42,289 INFO L85 PathProgramCache]: Analyzing trace with hash -853362942, now seen corresponding path program 1 times [2022-11-23 15:37:42,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:37:42,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580725928] [2022-11-23 15:37:42,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:37:42,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:37:42,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:37:43,190 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-11-23 15:37:43,190 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:37:43,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580725928] [2022-11-23 15:37:43,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580725928] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:37:43,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:37:43,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:37:43,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236118216] [2022-11-23 15:37:43,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:37:43,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:37:43,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:37:43,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:37:43,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:37:43,192 INFO L87 Difference]: Start difference. First operand 7433 states and 10644 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-23 15:37:45,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:37:52,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:37:52,147 INFO L93 Difference]: Finished difference Result 14717 states and 21243 transitions. [2022-11-23 15:37:52,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:37:52,147 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 151 [2022-11-23 15:37:52,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:37:52,188 INFO L225 Difference]: With dead ends: 14717 [2022-11-23 15:37:52,188 INFO L226 Difference]: Without dead ends: 7298 [2022-11-23 15:37:52,214 INFO L412 NwaCegarLoop]: 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 [2022-11-23 15:37:52,215 INFO L413 NwaCegarLoop]: 3666 mSDtfsCounter, 1 mSDsluCounter, 3663 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 7329 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:37:52,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 7329 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 789 Invalid, 1 Unknown, 0 Unchecked, 8.0s Time] [2022-11-23 15:37:52,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7298 states. [2022-11-23 15:37:52,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7298 to 7296. [2022-11-23 15:37:52,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7296 states, 4120 states have (on average 1.2402912621359223) internal successors, (5110), 4308 states have internal predecessors, (5110), 2587 states have call successors, (2587), 601 states have call predecessors, (2587), 586 states have return successors, (2718), 2522 states have call predecessors, (2718), 2584 states have call successors, (2718) [2022-11-23 15:37:52,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7296 states to 7296 states and 10415 transitions. [2022-11-23 15:37:52,898 INFO L78 Accepts]: Start accepts. Automaton has 7296 states and 10415 transitions. Word has length 151 [2022-11-23 15:37:52,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:37:52,899 INFO L495 AbstractCegarLoop]: Abstraction has 7296 states and 10415 transitions. [2022-11-23 15:37:52,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-23 15:37:52,899 INFO L276 IsEmpty]: Start isEmpty. Operand 7296 states and 10415 transitions. [2022-11-23 15:37:52,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-11-23 15:37:52,901 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:37:52,902 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-23 15:37:52,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-23 15:37:52,902 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_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)] === [2022-11-23 15:37:52,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:37:52,903 INFO L85 PathProgramCache]: Analyzing trace with hash 10805589, now seen corresponding path program 1 times [2022-11-23 15:37:52,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:37:52,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246593193] [2022-11-23 15:37:52,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:37:52,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:37:53,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:37:53,716 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2022-11-23 15:37:53,716 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:37:53,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246593193] [2022-11-23 15:37:53,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246593193] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:37:53,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:37:53,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:37:53,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473958598] [2022-11-23 15:37:53,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:37:53,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:37:53,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:37:53,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:37:53,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:37:53,718 INFO L87 Difference]: Start difference. First operand 7296 states and 10415 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-23 15:37:55,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:38:02,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:38:02,440 INFO L93 Difference]: Finished difference Result 14856 states and 21266 transitions. [2022-11-23 15:38:02,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:38:02,443 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 153 [2022-11-23 15:38:02,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:38:02,483 INFO L225 Difference]: With dead ends: 14856 [2022-11-23 15:38:02,483 INFO L226 Difference]: Without dead ends: 7574 [2022-11-23 15:38:02,513 INFO L412 NwaCegarLoop]: 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 [2022-11-23 15:38:02,514 INFO L413 NwaCegarLoop]: 3724 mSDtfsCounter, 242 mSDsluCounter, 3511 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 7235 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2022-11-23 15:38:02,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 7235 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 773 Invalid, 1 Unknown, 0 Unchecked, 7.8s Time] [2022-11-23 15:38:02,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7574 states. [2022-11-23 15:38:03,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7574 to 7304. [2022-11-23 15:38:03,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7304 states, 4126 states have (on average 1.240426563257392) internal successors, (5118), 4315 states have internal predecessors, (5118), 2588 states have call successors, (2588), 601 states have call predecessors, (2588), 587 states have return successors, (2721), 2523 states have call predecessors, (2721), 2585 states have call successors, (2721) [2022-11-23 15:38:03,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 10427 transitions. [2022-11-23 15:38:03,674 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 10427 transitions. Word has length 153 [2022-11-23 15:38:03,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:38:03,675 INFO L495 AbstractCegarLoop]: Abstraction has 7304 states and 10427 transitions. [2022-11-23 15:38:03,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-23 15:38:03,675 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 10427 transitions. [2022-11-23 15:38:03,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-11-23 15:38:03,677 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:38:03,677 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-23 15:38:03,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-23 15:38:03,678 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_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)] === [2022-11-23 15:38:03,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:38:03,678 INFO L85 PathProgramCache]: Analyzing trace with hash -2115442812, now seen corresponding path program 1 times [2022-11-23 15:38:03,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:38:03,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643029720] [2022-11-23 15:38:03,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:38:03,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:38:04,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:38:04,424 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2022-11-23 15:38:04,424 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:38:04,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643029720] [2022-11-23 15:38:04,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643029720] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:38:04,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:38:04,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:38:04,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730334947] [2022-11-23 15:38:04,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:38:04,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:38:04,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:38:04,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:38:04,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:38:04,426 INFO L87 Difference]: Start difference. First operand 7304 states and 10427 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (23), 1 states have call predecessors, (23), 1 states have call successors, (23) [2022-11-23 15:38:06,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:38:13,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:38:13,342 INFO L93 Difference]: Finished difference Result 14653 states and 20958 transitions. [2022-11-23 15:38:13,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:38:13,343 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (23), 1 states have call predecessors, (23), 1 states have call successors, (23) Word has length 154 [2022-11-23 15:38:13,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:38:13,381 INFO L225 Difference]: With dead ends: 14653 [2022-11-23 15:38:13,381 INFO L226 Difference]: Without dead ends: 7363 [2022-11-23 15:38:13,414 INFO L412 NwaCegarLoop]: 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 [2022-11-23 15:38:13,415 INFO L413 NwaCegarLoop]: 3688 mSDtfsCounter, 26 mSDsluCounter, 3670 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 7358 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:38:13,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 7358 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 792 Invalid, 1 Unknown, 0 Unchecked, 8.0s Time] [2022-11-23 15:38:13,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7363 states. [2022-11-23 15:38:14,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7363 to 7306. [2022-11-23 15:38:14,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7306 states, 4128 states have (on average 1.2403100775193798) internal successors, (5120), 4317 states have internal predecessors, (5120), 2588 states have call successors, (2588), 601 states have call predecessors, (2588), 587 states have return successors, (2721), 2523 states have call predecessors, (2721), 2585 states have call successors, (2721) [2022-11-23 15:38:14,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7306 states to 7306 states and 10429 transitions. [2022-11-23 15:38:14,420 INFO L78 Accepts]: Start accepts. Automaton has 7306 states and 10429 transitions. Word has length 154 [2022-11-23 15:38:14,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:38:14,420 INFO L495 AbstractCegarLoop]: Abstraction has 7306 states and 10429 transitions. [2022-11-23 15:38:14,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (23), 1 states have call predecessors, (23), 1 states have call successors, (23) [2022-11-23 15:38:14,420 INFO L276 IsEmpty]: Start isEmpty. Operand 7306 states and 10429 transitions. [2022-11-23 15:38:14,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-23 15:38:14,423 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:38:14,423 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-23 15:38:14,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-23 15:38:14,424 INFO L420 AbstractCegarLoop]: === Iteration 26 === 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)] === [2022-11-23 15:38:14,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:38:14,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1300068114, now seen corresponding path program 1 times [2022-11-23 15:38:14,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:38:14,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374396914] [2022-11-23 15:38:14,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:38:14,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:38:14,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:38:16,268 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2022-11-23 15:38:16,269 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:38:16,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374396914] [2022-11-23 15:38:16,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374396914] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:38:16,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:38:16,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:38:16,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396202369] [2022-11-23 15:38:16,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:38:16,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:38:16,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:38:16,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:38:16,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:38:16,271 INFO L87 Difference]: Start difference. First operand 7306 states and 10429 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-23 15:38:18,356 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:38:28,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:38:28,063 INFO L93 Difference]: Finished difference Result 7326 states and 10447 transitions. [2022-11-23 15:38:28,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:38:28,064 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 155 [2022-11-23 15:38:28,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:38:28,090 INFO L225 Difference]: With dead ends: 7326 [2022-11-23 15:38:28,090 INFO L226 Difference]: Without dead ends: 7324 [2022-11-23 15:38:28,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:38:28,095 INFO L413 NwaCegarLoop]: 3667 mSDtfsCounter, 3973 mSDsluCounter, 7352 mSDsCounter, 0 mSdLazyCounter, 1193 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3978 SdHoareTripleChecker+Valid, 11019 SdHoareTripleChecker+Invalid, 1196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1193 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2022-11-23 15:38:28,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3978 Valid, 11019 Invalid, 1196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1193 Invalid, 1 Unknown, 0 Unchecked, 10.8s Time] [2022-11-23 15:38:28,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7324 states. [2022-11-23 15:38:28,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7324 to 7322. [2022-11-23 15:38:28,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7322 states, 4140 states have (on average 1.2396135265700483) internal successors, (5132), 4329 states have internal predecessors, (5132), 2588 states have call successors, (2588), 605 states have call predecessors, (2588), 591 states have return successors, (2721), 2523 states have call predecessors, (2721), 2585 states have call successors, (2721) [2022-11-23 15:38:28,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7322 states to 7322 states and 10441 transitions. [2022-11-23 15:38:28,899 INFO L78 Accepts]: Start accepts. Automaton has 7322 states and 10441 transitions. Word has length 155 [2022-11-23 15:38:28,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:38:28,900 INFO L495 AbstractCegarLoop]: Abstraction has 7322 states and 10441 transitions. [2022-11-23 15:38:28,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-23 15:38:28,900 INFO L276 IsEmpty]: Start isEmpty. Operand 7322 states and 10441 transitions. [2022-11-23 15:38:28,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-11-23 15:38:28,903 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:38:28,903 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-23 15:38:28,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-23 15:38:28,904 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_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)] === [2022-11-23 15:38:28,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:38:28,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1901511884, now seen corresponding path program 1 times [2022-11-23 15:38:28,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:38:28,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006447854] [2022-11-23 15:38:28,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:38:28,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:38:29,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:38:29,948 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2022-11-23 15:38:29,949 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:38:29,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006447854] [2022-11-23 15:38:29,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006447854] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:38:29,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173121956] [2022-11-23 15:38:29,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:38:29,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:38:29,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64c9a7b-5ae8-44ac-b0ca-b1e5faa33baf/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:38:29,954 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64c9a7b-5ae8-44ac-b0ca-b1e5faa33baf/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:38:29,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64c9a7b-5ae8-44ac-b0ca-b1e5faa33baf/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:38:34,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:38:34,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 5734 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:38:34,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:38:34,561 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2022-11-23 15:38:34,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:38:34,837 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2022-11-23 15:38:34,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173121956] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:38:34,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1397047603] [2022-11-23 15:38:34,863 INFO L159 IcfgInterpreter]: Started Sifa with 104 locations of interest [2022-11-23 15:38:34,863 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:38:34,867 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:38:34,872 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:38:34,873 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:38:45,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:38:45,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:38:45,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:38:45,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:38:45,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:38:45,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:38:45,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:38:45,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:38:45,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:38:45,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:38:45,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:38:45,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:38:45,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:38:45,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:38:45,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:38:45,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:38:46,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:38:46,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:38:46,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:38:46,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:38:46,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:38:46,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:38:46,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:38:46,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:38:46,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:38:46,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:38:46,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:38:46,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:38:46,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:38:46,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:38:46,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:38:46,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:38:46,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:38:46,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:38:46,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:38:46,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:38:46,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:38:46,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:38:46,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:38:46,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:38:46,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:38:46,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:38:46,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:38:46,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:38:46,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:38:46,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:38:46,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:38:46,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:38:46,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:38:46,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:38:46,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:38:46,185 INFO L217 Elim1Store]: Index analysis took 289 ms [2022-11-23 15:40:35,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 51 select indices, 51 select index equivalence classes, 1326 disjoint index pairs (out of 1275 index pairs), introduced 51 new quantified variables, introduced 0 case distinctions, treesize of input 5105 treesize of output 4367