./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dnet.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb132a5b-0f30-4157-9351-24f0e8746e98/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb132a5b-0f30-4157-9351-24f0e8746e98/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb132a5b-0f30-4157-9351-24f0e8746e98/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb132a5b-0f30-4157-9351-24f0e8746e98/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dnet.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb132a5b-0f30-4157-9351-24f0e8746e98/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb132a5b-0f30-4157-9351-24f0e8746e98/bin/utaipan-eEHZpOm5b7 --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 fbb6aba39a63540626ae26255eab93a5f2c0864f87ba11cb320579066e7aefd2 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:18:44,238 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:18:44,242 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:18:44,296 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:18:44,296 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:18:44,298 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:18:44,300 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:18:44,303 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:18:44,305 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:18:44,307 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:18:44,309 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:18:44,310 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:18:44,311 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:18:44,313 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:18:44,315 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:18:44,317 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:18:44,319 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:18:44,320 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:18:44,323 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:18:44,326 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:18:44,328 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:18:44,330 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:18:44,333 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:18:44,334 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:18:44,338 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:18:44,339 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:18:44,340 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:18:44,341 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:18:44,342 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:18:44,343 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:18:44,344 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:18:44,345 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:18:44,346 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:18:44,347 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:18:44,349 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:18:44,349 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:18:44,350 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:18:44,351 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:18:44,351 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:18:44,353 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:18:44,354 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:18:44,355 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb132a5b-0f30-4157-9351-24f0e8746e98/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-25 20:18:44,382 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:18:44,382 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:18:44,383 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:18:44,383 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:18:44,384 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:18:44,385 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:18:44,385 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:18:44,386 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:18:44,386 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:18:44,387 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:18:44,387 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:18:44,387 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:18:44,388 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:18:44,388 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:18:44,389 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:18:44,389 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:18:44,390 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:18:44,390 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:18:44,391 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:18:44,392 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:18:44,392 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:18:44,392 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:18:44,392 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:18:44,393 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:18:44,393 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:18:44,393 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:18:44,394 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:18:44,394 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:18:44,394 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:18:44,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:18:44,395 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:18:44,395 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:18:44,395 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:18:44,396 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:18:44,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:18:44,396 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:18:44,396 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:18:44,397 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:18:44,397 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb132a5b-0f30-4157-9351-24f0e8746e98/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb132a5b-0f30-4157-9351-24f0e8746e98/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fbb6aba39a63540626ae26255eab93a5f2c0864f87ba11cb320579066e7aefd2 [2021-11-25 20:18:44,675 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:18:44,712 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:18:44,715 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:18:44,716 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:18:44,717 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:18:44,719 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb132a5b-0f30-4157-9351-24f0e8746e98/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dnet.cil.i [2021-11-25 20:18:44,806 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb132a5b-0f30-4157-9351-24f0e8746e98/bin/utaipan-eEHZpOm5b7/data/6c3793c01/6b61a9f9750f4629ac1841d0aff4fce0/FLAG0f24ce164 [2021-11-25 20:18:45,895 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:18:45,896 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb132a5b-0f30-4157-9351-24f0e8746e98/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dnet.cil.i [2021-11-25 20:18:45,969 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb132a5b-0f30-4157-9351-24f0e8746e98/bin/utaipan-eEHZpOm5b7/data/6c3793c01/6b61a9f9750f4629ac1841d0aff4fce0/FLAG0f24ce164 [2021-11-25 20:18:46,188 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb132a5b-0f30-4157-9351-24f0e8746e98/bin/utaipan-eEHZpOm5b7/data/6c3793c01/6b61a9f9750f4629ac1841d0aff4fce0 [2021-11-25 20:18:46,191 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:18:46,193 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:18:46,194 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:18:46,195 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:18:46,215 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:18:46,215 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:18:46" (1/1) ... [2021-11-25 20:18:46,217 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b838a61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:18:46, skipping insertion in model container [2021-11-25 20:18:46,217 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:18:46" (1/1) ... [2021-11-25 20:18:46,226 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:18:46,386 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:18:49,545 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb132a5b-0f30-4157-9351-24f0e8746e98/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dnet.cil.i[305216,305229] [2021-11-25 20:18:49,549 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb132a5b-0f30-4157-9351-24f0e8746e98/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dnet.cil.i[305385,305398] [2021-11-25 20:18:49,549 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb132a5b-0f30-4157-9351-24f0e8746e98/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dnet.cil.i[305552,305565] [2021-11-25 20:18:49,550 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb132a5b-0f30-4157-9351-24f0e8746e98/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dnet.cil.i[305720,305733] [2021-11-25 20:18:49,569 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:18:49,622 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:18:50,013 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb132a5b-0f30-4157-9351-24f0e8746e98/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dnet.cil.i[305216,305229] [2021-11-25 20:18:50,013 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb132a5b-0f30-4157-9351-24f0e8746e98/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dnet.cil.i[305385,305398] [2021-11-25 20:18:50,014 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb132a5b-0f30-4157-9351-24f0e8746e98/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dnet.cil.i[305552,305565] [2021-11-25 20:18:50,015 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb132a5b-0f30-4157-9351-24f0e8746e98/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dnet.cil.i[305720,305733] [2021-11-25 20:18:50,026 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:18:50,245 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:18:50,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:18:50 WrapperNode [2021-11-25 20:18:50,246 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:18:50,247 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:18:50,247 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:18:50,248 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:18:50,259 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:18:50" (1/1) ... [2021-11-25 20:18:50,369 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:18:50" (1/1) ... [2021-11-25 20:18:50,577 INFO L137 Inliner]: procedures = 411, calls = 1991, calls flagged for inlining = 210, calls inlined = 187, statements flattened = 4406 [2021-11-25 20:18:50,578 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:18:50,579 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:18:50,579 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:18:50,580 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:18:50,590 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:18:50" (1/1) ... [2021-11-25 20:18:50,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:18:50" (1/1) ... [2021-11-25 20:18:50,612 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:18:50" (1/1) ... [2021-11-25 20:18:50,615 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:18:50" (1/1) ... [2021-11-25 20:18:50,829 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:18:50" (1/1) ... [2021-11-25 20:18:50,864 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:18:50" (1/1) ... [2021-11-25 20:18:50,895 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:18:50" (1/1) ... [2021-11-25 20:18:50,928 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:18:50,930 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:18:50,930 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:18:50,930 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:18:50,932 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:18:50" (1/1) ... [2021-11-25 20:18:50,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:18:50,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb132a5b-0f30-4157-9351-24f0e8746e98/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:18:50,970 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb132a5b-0f30-4157-9351-24f0e8746e98/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:18:50,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb132a5b-0f30-4157-9351-24f0e8746e98/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:18:51,029 INFO L130 BoogieDeclarations]: Found specification of procedure dnet_probe [2021-11-25 20:18:51,029 INFO L138 BoogieDeclarations]: Found implementation of procedure dnet_probe [2021-11-25 20:18:51,030 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-25 20:18:51,030 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-25 20:18:51,030 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-25 20:18:51,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-25 20:18:51,030 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2021-11-25 20:18:51,031 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2021-11-25 20:18:51,031 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-25 20:18:51,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-25 20:18:51,031 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-11-25 20:18:51,031 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-11-25 20:18:51,032 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_61 [2021-11-25 20:18:51,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_61 [2021-11-25 20:18:51,032 INFO L130 BoogieDeclarations]: Found specification of procedure __dnet_set_hwaddr [2021-11-25 20:18:51,032 INFO L138 BoogieDeclarations]: Found implementation of procedure __dnet_set_hwaddr [2021-11-25 20:18:51,033 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-25 20:18:51,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-25 20:18:51,033 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-11-25 20:18:51,033 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-11-25 20:18:51,033 INFO L130 BoogieDeclarations]: Found specification of procedure skb_end_pointer [2021-11-25 20:18:51,034 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_end_pointer [2021-11-25 20:18:51,034 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-25 20:18:51,034 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-25 20:18:51,034 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-25 20:18:51,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-25 20:18:51,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 20:18:51,035 INFO L130 BoogieDeclarations]: Found specification of procedure iounmap [2021-11-25 20:18:51,035 INFO L138 BoogieDeclarations]: Found implementation of procedure iounmap [2021-11-25 20:18:51,035 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-25 20:18:51,036 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-25 20:18:51,037 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-25 20:18:51,037 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_netdev [2021-11-25 20:18:51,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_netdev [2021-11-25 20:18:51,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-25 20:18:51,037 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-25 20:18:51,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-25 20:18:51,038 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 20:18:51,038 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2021-11-25 20:18:51,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2021-11-25 20:18:51,038 INFO L130 BoogieDeclarations]: Found specification of procedure dnet_reset_hw [2021-11-25 20:18:51,039 INFO L138 BoogieDeclarations]: Found implementation of procedure dnet_reset_hw [2021-11-25 20:18:51,040 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-25 20:18:51,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-25 20:18:51,042 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 20:18:51,042 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_1 [2021-11-25 20:18:51,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_1 [2021-11-25 20:18:51,042 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_0 [2021-11-25 20:18:51,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_0 [2021-11-25 20:18:51,043 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_2 [2021-11-25 20:18:51,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_2 [2021-11-25 20:18:51,043 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:18:51,043 INFO L130 BoogieDeclarations]: Found specification of procedure is_valid_ether_addr [2021-11-25 20:18:51,043 INFO L138 BoogieDeclarations]: Found implementation of procedure is_valid_ether_addr [2021-11-25 20:18:51,044 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-25 20:18:51,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-25 20:18:51,045 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-25 20:18:51,045 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-25 20:18:51,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 20:18:51,046 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-25 20:18:51,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-25 20:18:51,046 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-25 20:18:51,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-25 20:18:51,046 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_spin_lock [2021-11-25 20:18:51,047 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_spin_lock [2021-11-25 20:18:51,047 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-25 20:18:51,047 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-25 20:18:51,048 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2021-11-25 20:18:51,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2021-11-25 20:18:51,048 INFO L130 BoogieDeclarations]: Found specification of procedure dev_name [2021-11-25 20:18:51,049 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_name [2021-11-25 20:18:51,049 INFO L130 BoogieDeclarations]: Found specification of procedure writel [2021-11-25 20:18:51,049 INFO L138 BoogieDeclarations]: Found implementation of procedure writel [2021-11-25 20:18:51,049 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-25 20:18:51,050 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-25 20:18:51,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:18:51,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:18:51,051 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2021-11-25 20:18:51,051 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2021-11-25 20:18:51,051 INFO L130 BoogieDeclarations]: Found specification of procedure mdiobus_free [2021-11-25 20:18:51,052 INFO L138 BoogieDeclarations]: Found implementation of procedure mdiobus_free [2021-11-25 20:18:51,052 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-25 20:18:51,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-25 20:18:51,053 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-25 20:18:51,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-25 20:18:51,053 INFO L130 BoogieDeclarations]: Found specification of procedure mdiobus_unregister [2021-11-25 20:18:51,054 INFO L138 BoogieDeclarations]: Found implementation of procedure mdiobus_unregister [2021-11-25 20:18:51,054 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-25 20:18:51,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-25 20:18:51,054 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_lock_of_dnet [2021-11-25 20:18:51,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_lock_of_dnet [2021-11-25 20:18:51,055 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-25 20:18:51,055 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-25 20:18:51,055 INFO L130 BoogieDeclarations]: Found specification of procedure dnet_readw_mac [2021-11-25 20:18:51,056 INFO L138 BoogieDeclarations]: Found implementation of procedure dnet_readw_mac [2021-11-25 20:18:51,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 20:18:51,056 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 20:18:51,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 20:18:51,056 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2021-11-25 20:18:51,057 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2021-11-25 20:18:51,057 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-25 20:18:51,057 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-25 20:18:51,058 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-25 20:18:51,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-25 20:18:51,059 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_irq [2021-11-25 20:18:51,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_irq [2021-11-25 20:18:51,063 INFO L130 BoogieDeclarations]: Found specification of procedure dnet_close [2021-11-25 20:18:51,063 INFO L138 BoogieDeclarations]: Found implementation of procedure dnet_close [2021-11-25 20:18:51,063 INFO L130 BoogieDeclarations]: Found specification of procedure __be16_to_cpup [2021-11-25 20:18:51,063 INFO L138 BoogieDeclarations]: Found implementation of procedure __be16_to_cpup [2021-11-25 20:18:51,064 INFO L130 BoogieDeclarations]: Found specification of procedure dnet_handle_link_change [2021-11-25 20:18:51,065 INFO L138 BoogieDeclarations]: Found implementation of procedure dnet_handle_link_change [2021-11-25 20:18:51,065 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-11-25 20:18:51,065 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-11-25 20:18:51,066 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-25 20:18:51,073 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-25 20:18:51,073 INFO L130 BoogieDeclarations]: Found specification of procedure dnet_writew_mac [2021-11-25 20:18:51,073 INFO L138 BoogieDeclarations]: Found implementation of procedure dnet_writew_mac [2021-11-25 20:18:51,073 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-25 20:18:51,074 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-25 20:18:51,074 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-25 20:18:51,074 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-25 20:18:51,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 20:18:51,074 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-25 20:18:51,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-25 20:18:51,075 INFO L130 BoogieDeclarations]: Found specification of procedure dnet_remove [2021-11-25 20:18:51,075 INFO L138 BoogieDeclarations]: Found implementation of procedure dnet_remove [2021-11-25 20:18:51,075 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2021-11-25 20:18:51,075 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2021-11-25 20:18:51,075 INFO L130 BoogieDeclarations]: Found specification of procedure dnet_open [2021-11-25 20:18:51,076 INFO L138 BoogieDeclarations]: Found implementation of procedure dnet_open [2021-11-25 20:18:51,076 INFO L130 BoogieDeclarations]: Found specification of procedure phy_connect [2021-11-25 20:18:51,076 INFO L138 BoogieDeclarations]: Found implementation of procedure phy_connect [2021-11-25 20:18:51,076 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-25 20:18:51,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-25 20:18:51,077 INFO L130 BoogieDeclarations]: Found specification of procedure readl [2021-11-25 20:18:51,077 INFO L138 BoogieDeclarations]: Found implementation of procedure readl [2021-11-25 20:18:51,077 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:18:51,077 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-25 20:18:51,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-25 20:18:51,077 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_netdev [2021-11-25 20:18:51,078 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_netdev [2021-11-25 20:18:51,906 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:18:51,909 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:18:52,803 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-25 20:18:58,873 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-25 20:18:58,937 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:18:59,892 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:18:59,892 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 20:18:59,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:18:59 BoogieIcfgContainer [2021-11-25 20:18:59,898 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:18:59,900 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:18:59,900 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:18:59,904 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:18:59,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:18:46" (1/3) ... [2021-11-25 20:18:59,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3de08ad9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:18:59, skipping insertion in model container [2021-11-25 20:18:59,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:18:50" (2/3) ... [2021-11-25 20:18:59,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3de08ad9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:18:59, skipping insertion in model container [2021-11-25 20:18:59,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:18:59" (3/3) ... [2021-11-25 20:18:59,908 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dnet.cil.i [2021-11-25 20:18:59,914 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:18:59,915 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-25 20:18:59,985 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:19:00,002 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 20:19:00,002 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-25 20:19:00,059 INFO L276 IsEmpty]: Start isEmpty. Operand has 970 states, 581 states have (on average 1.306368330464716) internal successors, (759), 594 states have internal predecessors, (759), 324 states have call successors, (324), 63 states have call predecessors, (324), 62 states have return successors, (317), 315 states have call predecessors, (317), 317 states have call successors, (317) [2021-11-25 20:19:00,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-25 20:19:00,080 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:19:00,081 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:19:00,081 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:19:00,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:19:00,087 INFO L85 PathProgramCache]: Analyzing trace with hash 568666750, now seen corresponding path program 1 times [2021-11-25 20:19:00,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:19:00,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153119446] [2021-11-25 20:19:00,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:19:00,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:19:00,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:19:00,965 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2021-11-25 20:19:00,967 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:19:00,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153119446] [2021-11-25 20:19:00,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153119446] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:19:00,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:19:00,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:19:00,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13064951] [2021-11-25 20:19:00,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:19:00,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:19:00,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:19:01,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:19:01,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:19:01,026 INFO L87 Difference]: Start difference. First operand has 970 states, 581 states have (on average 1.306368330464716) internal successors, (759), 594 states have internal predecessors, (759), 324 states have call successors, (324), 63 states have call predecessors, (324), 62 states have return successors, (317), 315 states have call predecessors, (317), 317 states have call successors, (317) Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-25 20:19:03,603 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:19:05,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:19:05,762 INFO L93 Difference]: Finished difference Result 2749 states and 4003 transitions. [2021-11-25 20:19:05,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:19:05,767 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 117 [2021-11-25 20:19:05,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:19:05,805 INFO L225 Difference]: With dead ends: 2749 [2021-11-25 20:19:05,805 INFO L226 Difference]: Without dead ends: 1788 [2021-11-25 20:19:05,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:19:05,822 INFO L933 BasicCegarLoop]: 1404 mSDtfsCounter, 1223 mSDsluCounter, 1358 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1223 SdHoareTripleChecker+Valid, 2517 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:19:05,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1223 Valid, 2517 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 510 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2021-11-25 20:19:05,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1788 states. [2021-11-25 20:19:06,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1788 to 1784. [2021-11-25 20:19:06,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1088 states have (on average 1.3060661764705883) internal successors, (1421), 1112 states have internal predecessors, (1421), 572 states have call successors, (572), 122 states have call predecessors, (572), 121 states have return successors, (569), 565 states have call predecessors, (569), 569 states have call successors, (569) [2021-11-25 20:19:06,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 2562 transitions. [2021-11-25 20:19:06,115 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 2562 transitions. Word has length 117 [2021-11-25 20:19:06,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:19:06,117 INFO L470 AbstractCegarLoop]: Abstraction has 1784 states and 2562 transitions. [2021-11-25 20:19:06,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-25 20:19:06,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 2562 transitions. [2021-11-25 20:19:06,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-25 20:19:06,127 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:19:06,128 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:19:06,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:19:06,128 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:19:06,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:19:06,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1222086011, now seen corresponding path program 1 times [2021-11-25 20:19:06,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:19:06,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928945885] [2021-11-25 20:19:06,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:19:06,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:19:06,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:19:06,386 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2021-11-25 20:19:06,386 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:19:06,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928945885] [2021-11-25 20:19:06,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928945885] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:19:06,387 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:19:06,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:19:06,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492377584] [2021-11-25 20:19:06,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:19:06,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:19:06,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:19:06,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:19:06,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:19:06,399 INFO L87 Difference]: Start difference. First operand 1784 states and 2562 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-25 20:19:08,717 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:19:11,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:19:11,376 INFO L93 Difference]: Finished difference Result 5114 states and 7427 transitions. [2021-11-25 20:19:11,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:19:11,378 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 119 [2021-11-25 20:19:11,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:19:11,425 INFO L225 Difference]: With dead ends: 5114 [2021-11-25 20:19:11,426 INFO L226 Difference]: Without dead ends: 3351 [2021-11-25 20:19:11,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:19:11,442 INFO L933 BasicCegarLoop]: 1490 mSDtfsCounter, 1178 mSDsluCounter, 1370 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1178 SdHoareTripleChecker+Valid, 2616 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:19:11,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1178 Valid, 2616 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 531 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2021-11-25 20:19:11,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3351 states. [2021-11-25 20:19:11,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3351 to 3322. [2021-11-25 20:19:11,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3322 states, 2047 states have (on average 1.3141182217879823) internal successors, (2690), 2097 states have internal predecessors, (2690), 1033 states have call successors, (1033), 242 states have call predecessors, (1033), 239 states have return successors, (1130), 1012 states have call predecessors, (1130), 1030 states have call successors, (1130) [2021-11-25 20:19:11,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3322 states to 3322 states and 4853 transitions. [2021-11-25 20:19:11,897 INFO L78 Accepts]: Start accepts. Automaton has 3322 states and 4853 transitions. Word has length 119 [2021-11-25 20:19:11,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:19:11,899 INFO L470 AbstractCegarLoop]: Abstraction has 3322 states and 4853 transitions. [2021-11-25 20:19:11,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-25 20:19:11,899 INFO L276 IsEmpty]: Start isEmpty. Operand 3322 states and 4853 transitions. [2021-11-25 20:19:11,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-25 20:19:11,911 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:19:11,912 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:19:11,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 20:19:11,912 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:19:11,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:19:11,913 INFO L85 PathProgramCache]: Analyzing trace with hash -2114285433, now seen corresponding path program 1 times [2021-11-25 20:19:11,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:19:11,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587754394] [2021-11-25 20:19:11,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:19:11,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:19:12,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:19:12,208 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2021-11-25 20:19:12,209 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:19:12,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587754394] [2021-11-25 20:19:12,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587754394] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:19:12,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:19:12,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:19:12,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440493184] [2021-11-25 20:19:12,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:19:12,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:19:12,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:19:12,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:19:12,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:19:12,218 INFO L87 Difference]: Start difference. First operand 3322 states and 4853 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-25 20:19:14,758 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:19:17,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:19:17,334 INFO L93 Difference]: Finished difference Result 9306 states and 13482 transitions. [2021-11-25 20:19:17,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:19:17,335 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 127 [2021-11-25 20:19:17,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:19:17,395 INFO L225 Difference]: With dead ends: 9306 [2021-11-25 20:19:17,395 INFO L226 Difference]: Without dead ends: 6005 [2021-11-25 20:19:17,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:19:17,420 INFO L933 BasicCegarLoop]: 1490 mSDtfsCounter, 1010 mSDsluCounter, 1284 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 29 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1010 SdHoareTripleChecker+Valid, 2553 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:19:17,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1010 Valid, 2553 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 621 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2021-11-25 20:19:17,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6005 states. [2021-11-25 20:19:17,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6005 to 5972. [2021-11-25 20:19:17,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5972 states, 3641 states have (on average 1.284811864872288) internal successors, (4678), 3747 states have internal predecessors, (4678), 1863 states have call successors, (1863), 470 states have call predecessors, (1863), 465 states have return successors, (1966), 1814 states have call predecessors, (1966), 1860 states have call successors, (1966) [2021-11-25 20:19:17,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5972 states to 5972 states and 8507 transitions. [2021-11-25 20:19:17,953 INFO L78 Accepts]: Start accepts. Automaton has 5972 states and 8507 transitions. Word has length 127 [2021-11-25 20:19:17,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:19:17,955 INFO L470 AbstractCegarLoop]: Abstraction has 5972 states and 8507 transitions. [2021-11-25 20:19:17,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-25 20:19:17,956 INFO L276 IsEmpty]: Start isEmpty. Operand 5972 states and 8507 transitions. [2021-11-25 20:19:17,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-25 20:19:17,961 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:19:17,961 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:19:17,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 20:19:17,962 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:19:17,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:19:17,963 INFO L85 PathProgramCache]: Analyzing trace with hash 744030197, now seen corresponding path program 1 times [2021-11-25 20:19:17,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:19:17,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348459392] [2021-11-25 20:19:17,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:19:17,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:19:18,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:19:18,229 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2021-11-25 20:19:18,229 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:19:18,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348459392] [2021-11-25 20:19:18,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348459392] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:19:18,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:19:18,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:19:18,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161602447] [2021-11-25 20:19:18,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:19:18,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:19:18,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:19:18,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:19:18,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:19:18,234 INFO L87 Difference]: Start difference. First operand 5972 states and 8507 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-25 20:19:21,339 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:19:23,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:19:23,845 INFO L93 Difference]: Finished difference Result 16694 states and 23960 transitions. [2021-11-25 20:19:23,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:19:23,846 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 135 [2021-11-25 20:19:23,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:19:23,964 INFO L225 Difference]: With dead ends: 16694 [2021-11-25 20:19:23,965 INFO L226 Difference]: Without dead ends: 10743 [2021-11-25 20:19:24,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:19:24,005 INFO L933 BasicCegarLoop]: 1386 mSDtfsCounter, 1091 mSDsluCounter, 1332 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1091 SdHoareTripleChecker+Valid, 2489 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:19:24,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1091 Valid, 2489 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 532 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2021-11-25 20:19:24,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10743 states. [2021-11-25 20:19:24,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10743 to 10702. [2021-11-25 20:19:24,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10702 states, 6517 states have (on average 1.2696025778732545) internal successors, (8274), 6719 states have internal predecessors, (8274), 3303 states have call successors, (3303), 896 states have call predecessors, (3303), 879 states have return successors, (3818), 3178 states have call predecessors, (3818), 3300 states have call successors, (3818) [2021-11-25 20:19:24,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10702 states to 10702 states and 15395 transitions. [2021-11-25 20:19:24,960 INFO L78 Accepts]: Start accepts. Automaton has 10702 states and 15395 transitions. Word has length 135 [2021-11-25 20:19:24,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:19:24,962 INFO L470 AbstractCegarLoop]: Abstraction has 10702 states and 15395 transitions. [2021-11-25 20:19:24,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-25 20:19:24,964 INFO L276 IsEmpty]: Start isEmpty. Operand 10702 states and 15395 transitions. [2021-11-25 20:19:24,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-25 20:19:24,968 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:19:24,969 INFO L514 BasicCegarLoop]: trace histogram [12, 10, 10, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:19:24,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 20:19:24,970 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:19:24,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:19:24,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1624052245, now seen corresponding path program 1 times [2021-11-25 20:19:24,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:19:24,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946093863] [2021-11-25 20:19:24,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:19:24,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:19:25,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:19:25,206 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2021-11-25 20:19:25,207 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:19:25,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946093863] [2021-11-25 20:19:25,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946093863] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:19:25,207 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:19:25,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:19:25,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034678508] [2021-11-25 20:19:25,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:19:25,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:19:25,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:19:25,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:19:25,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:19:25,210 INFO L87 Difference]: Start difference. First operand 10702 states and 15395 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-25 20:19:28,645 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:19:30,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:19:30,081 INFO L93 Difference]: Finished difference Result 20180 states and 29062 transitions. [2021-11-25 20:19:30,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:19:30,081 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 146 [2021-11-25 20:19:30,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:19:30,155 INFO L225 Difference]: With dead ends: 20180 [2021-11-25 20:19:30,155 INFO L226 Difference]: Without dead ends: 9499 [2021-11-25 20:19:30,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:19:30,213 INFO L933 BasicCegarLoop]: 1829 mSDtfsCounter, 1177 mSDsluCounter, 1334 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1177 SdHoareTripleChecker+Valid, 2924 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:19:30,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1177 Valid, 2924 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 689 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2021-11-25 20:19:30,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9499 states. [2021-11-25 20:19:30,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9499 to 9467. [2021-11-25 20:19:30,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9467 states, 5871 states have (on average 1.2679270993016523) internal successors, (7444), 6060 states have internal predecessors, (7444), 2813 states have call successors, (2813), 793 states have call predecessors, (2813), 780 states have return successors, (3302), 2695 states have call predecessors, (3302), 2810 states have call successors, (3302) [2021-11-25 20:19:30,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9467 states to 9467 states and 13559 transitions. [2021-11-25 20:19:30,833 INFO L78 Accepts]: Start accepts. Automaton has 9467 states and 13559 transitions. Word has length 146 [2021-11-25 20:19:30,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:19:30,834 INFO L470 AbstractCegarLoop]: Abstraction has 9467 states and 13559 transitions. [2021-11-25 20:19:30,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-25 20:19:30,835 INFO L276 IsEmpty]: Start isEmpty. Operand 9467 states and 13559 transitions. [2021-11-25 20:19:30,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-25 20:19:30,839 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:19:30,839 INFO L514 BasicCegarLoop]: trace histogram [14, 10, 10, 10, 10, 10, 10, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:19:30,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 20:19:30,840 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:19:30,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:19:30,841 INFO L85 PathProgramCache]: Analyzing trace with hash 549316243, now seen corresponding path program 1 times [2021-11-25 20:19:30,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:19:30,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676774733] [2021-11-25 20:19:30,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:19:30,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:19:30,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:19:31,148 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 475 trivial. 0 not checked. [2021-11-25 20:19:31,148 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:19:31,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676774733] [2021-11-25 20:19:31,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676774733] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:19:31,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:19:31,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:19:31,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630235998] [2021-11-25 20:19:31,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:19:31,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:19:31,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:19:31,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:19:31,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:19:31,151 INFO L87 Difference]: Start difference. First operand 9467 states and 13559 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 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) [2021-11-25 20:19:34,138 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:19:37,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:19:37,741 INFO L93 Difference]: Finished difference Result 18804 states and 26945 transitions. [2021-11-25 20:19:37,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:19:37,747 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 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 155 [2021-11-25 20:19:37,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:19:37,883 INFO L225 Difference]: With dead ends: 18804 [2021-11-25 20:19:37,884 INFO L226 Difference]: Without dead ends: 18802 [2021-11-25 20:19:37,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:19:37,899 INFO L933 BasicCegarLoop]: 1393 mSDtfsCounter, 1246 mSDsluCounter, 4617 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1257 SdHoareTripleChecker+Valid, 5256 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-11-25 20:19:37,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1257 Valid, 5256 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1026 Invalid, 1 Unknown, 0 Unchecked, 5.9s Time] [2021-11-25 20:19:37,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18802 states. [2021-11-25 20:19:39,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18802 to 18796. [2021-11-25 20:19:39,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18796 states, 11644 states have (on average 1.269838543455857) internal successors, (14786), 12020 states have internal predecessors, (14786), 5588 states have call successors, (5588), 1587 states have call predecessors, (5588), 1561 states have return successors, (6566), 5352 states have call predecessors, (6566), 5582 states have call successors, (6566) [2021-11-25 20:19:39,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18796 states to 18796 states and 26940 transitions. [2021-11-25 20:19:39,339 INFO L78 Accepts]: Start accepts. Automaton has 18796 states and 26940 transitions. Word has length 155 [2021-11-25 20:19:39,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:19:39,340 INFO L470 AbstractCegarLoop]: Abstraction has 18796 states and 26940 transitions. [2021-11-25 20:19:39,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 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) [2021-11-25 20:19:39,340 INFO L276 IsEmpty]: Start isEmpty. Operand 18796 states and 26940 transitions. [2021-11-25 20:19:39,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-25 20:19:39,344 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:19:39,344 INFO L514 BasicCegarLoop]: trace histogram [14, 10, 10, 10, 10, 10, 10, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:19:39,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 20:19:39,345 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:19:39,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:19:39,345 INFO L85 PathProgramCache]: Analyzing trace with hash -905786563, now seen corresponding path program 1 times [2021-11-25 20:19:39,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:19:39,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539490473] [2021-11-25 20:19:39,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:19:39,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:19:39,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:19:39,667 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 475 trivial. 0 not checked. [2021-11-25 20:19:39,667 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:19:39,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539490473] [2021-11-25 20:19:39,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539490473] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:19:39,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:19:39,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:19:39,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133806142] [2021-11-25 20:19:39,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:19:39,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:19:39,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:19:39,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:19:39,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:19:39,670 INFO L87 Difference]: Start difference. First operand 18796 states and 26940 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 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) [2021-11-25 20:19:43,175 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:19:47,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:19:47,089 INFO L93 Difference]: Finished difference Result 18808 states and 26948 transitions. [2021-11-25 20:19:47,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:19:47,095 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 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 160 [2021-11-25 20:19:47,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:19:47,230 INFO L225 Difference]: With dead ends: 18808 [2021-11-25 20:19:47,231 INFO L226 Difference]: Without dead ends: 18806 [2021-11-25 20:19:47,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:19:47,247 INFO L933 BasicCegarLoop]: 1396 mSDtfsCounter, 1241 mSDsluCounter, 4617 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1251 SdHoareTripleChecker+Valid, 5259 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:19:47,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1251 Valid, 5259 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1026 Invalid, 1 Unknown, 0 Unchecked, 6.4s Time] [2021-11-25 20:19:47,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18806 states. [2021-11-25 20:19:48,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18806 to 18800. [2021-11-25 20:19:48,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18800 states, 11647 states have (on average 1.269769039237572) internal successors, (14789), 12023 states have internal predecessors, (14789), 5588 states have call successors, (5588), 1588 states have call predecessors, (5588), 1562 states have return successors, (6566), 5352 states have call predecessors, (6566), 5582 states have call successors, (6566) [2021-11-25 20:19:48,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18800 states to 18800 states and 26943 transitions. [2021-11-25 20:19:48,620 INFO L78 Accepts]: Start accepts. Automaton has 18800 states and 26943 transitions. Word has length 160 [2021-11-25 20:19:48,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:19:48,627 INFO L470 AbstractCegarLoop]: Abstraction has 18800 states and 26943 transitions. [2021-11-25 20:19:48,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 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) [2021-11-25 20:19:48,628 INFO L276 IsEmpty]: Start isEmpty. Operand 18800 states and 26943 transitions. [2021-11-25 20:19:48,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-25 20:19:48,632 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:19:48,632 INFO L514 BasicCegarLoop]: trace histogram [14, 10, 10, 10, 10, 10, 10, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:19:48,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 20:19:48,633 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:19:48,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:19:48,635 INFO L85 PathProgramCache]: Analyzing trace with hash 2120308883, now seen corresponding path program 1 times [2021-11-25 20:19:48,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:19:48,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546108678] [2021-11-25 20:19:48,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:19:48,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:19:48,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:19:48,994 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 479 trivial. 0 not checked. [2021-11-25 20:19:48,994 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:19:48,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546108678] [2021-11-25 20:19:48,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546108678] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:19:48,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:19:48,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:19:48,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116293284] [2021-11-25 20:19:48,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:19:48,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:19:48,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:19:48,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:19:48,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:19:48,998 INFO L87 Difference]: Start difference. First operand 18800 states and 26943 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 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) [2021-11-25 20:19:52,420 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:19:56,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:19:56,387 INFO L93 Difference]: Finished difference Result 18812 states and 26951 transitions. [2021-11-25 20:19:56,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:19:56,391 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 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 165 [2021-11-25 20:19:56,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:19:56,577 INFO L225 Difference]: With dead ends: 18812 [2021-11-25 20:19:56,577 INFO L226 Difference]: Without dead ends: 18810 [2021-11-25 20:19:56,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:19:56,586 INFO L933 BasicCegarLoop]: 1396 mSDtfsCounter, 1241 mSDsluCounter, 4617 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1250 SdHoareTripleChecker+Valid, 5259 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:19:56,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1250 Valid, 5259 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1026 Invalid, 1 Unknown, 0 Unchecked, 6.3s Time] [2021-11-25 20:19:56,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18810 states. [2021-11-25 20:19:57,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18810 to 18804. [2021-11-25 20:19:57,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18804 states, 11650 states have (on average 1.2696995708154506) internal successors, (14792), 12026 states have internal predecessors, (14792), 5588 states have call successors, (5588), 1589 states have call predecessors, (5588), 1563 states have return successors, (6566), 5352 states have call predecessors, (6566), 5582 states have call successors, (6566) [2021-11-25 20:19:57,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18804 states to 18804 states and 26946 transitions. [2021-11-25 20:19:57,862 INFO L78 Accepts]: Start accepts. Automaton has 18804 states and 26946 transitions. Word has length 165 [2021-11-25 20:19:57,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:19:57,863 INFO L470 AbstractCegarLoop]: Abstraction has 18804 states and 26946 transitions. [2021-11-25 20:19:57,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 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) [2021-11-25 20:19:57,864 INFO L276 IsEmpty]: Start isEmpty. Operand 18804 states and 26946 transitions. [2021-11-25 20:19:57,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-25 20:19:57,868 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:19:57,868 INFO L514 BasicCegarLoop]: trace histogram [14, 10, 10, 10, 10, 10, 10, 6, 6, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:19:57,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 20:19:57,869 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:19:57,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:19:57,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1610420715, now seen corresponding path program 1 times [2021-11-25 20:19:57,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:19:57,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152788887] [2021-11-25 20:19:57,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:19:57,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:19:57,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:19:58,326 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2021-11-25 20:19:58,327 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:19:58,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152788887] [2021-11-25 20:19:58,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152788887] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:19:58,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:19:58,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:19:58,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718822002] [2021-11-25 20:19:58,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:19:58,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:19:58,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:19:58,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:19:58,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:19:58,331 INFO L87 Difference]: Start difference. First operand 18804 states and 26946 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 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) [2021-11-25 20:20:01,635 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:20:04,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:20:04,913 INFO L93 Difference]: Finished difference Result 18816 states and 26954 transitions. [2021-11-25 20:20:04,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:20:04,918 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 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 179 [2021-11-25 20:20:04,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:20:05,033 INFO L225 Difference]: With dead ends: 18816 [2021-11-25 20:20:05,034 INFO L226 Difference]: Without dead ends: 18814 [2021-11-25 20:20:05,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:20:05,046 INFO L933 BasicCegarLoop]: 1396 mSDtfsCounter, 1237 mSDsluCounter, 4617 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1245 SdHoareTripleChecker+Valid, 5259 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-11-25 20:20:05,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1245 Valid, 5259 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1026 Invalid, 1 Unknown, 0 Unchecked, 5.9s Time] [2021-11-25 20:20:05,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18814 states. [2021-11-25 20:20:06,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18814 to 18808. [2021-11-25 20:20:06,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18808 states, 11653 states have (on average 1.2696301381618467) internal successors, (14795), 12029 states have internal predecessors, (14795), 5588 states have call successors, (5588), 1590 states have call predecessors, (5588), 1564 states have return successors, (6566), 5352 states have call predecessors, (6566), 5582 states have call successors, (6566) [2021-11-25 20:20:06,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18808 states to 18808 states and 26949 transitions. [2021-11-25 20:20:06,608 INFO L78 Accepts]: Start accepts. Automaton has 18808 states and 26949 transitions. Word has length 179 [2021-11-25 20:20:06,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:20:06,609 INFO L470 AbstractCegarLoop]: Abstraction has 18808 states and 26949 transitions. [2021-11-25 20:20:06,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 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) [2021-11-25 20:20:06,610 INFO L276 IsEmpty]: Start isEmpty. Operand 18808 states and 26949 transitions. [2021-11-25 20:20:06,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-25 20:20:06,615 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:20:06,615 INFO L514 BasicCegarLoop]: trace histogram [14, 10, 10, 10, 10, 10, 10, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:20:06,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 20:20:06,616 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:20:06,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:20:06,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1716517523, now seen corresponding path program 1 times [2021-11-25 20:20:06,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:20:06,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477135490] [2021-11-25 20:20:06,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:06,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:20:06,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:06,880 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2021-11-25 20:20:06,880 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:20:06,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477135490] [2021-11-25 20:20:06,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477135490] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:20:06,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:20:06,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:20:06,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387361661] [2021-11-25 20:20:06,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:20:06,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:20:06,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:20:06,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:20:06,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:20:06,884 INFO L87 Difference]: Start difference. First operand 18808 states and 26949 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-25 20:20:10,080 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:20:13,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:20:13,745 INFO L93 Difference]: Finished difference Result 18820 states and 26957 transitions. [2021-11-25 20:20:13,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:20:13,751 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 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 175 [2021-11-25 20:20:13,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:20:13,940 INFO L225 Difference]: With dead ends: 18820 [2021-11-25 20:20:13,940 INFO L226 Difference]: Without dead ends: 18818 [2021-11-25 20:20:13,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:20:13,951 INFO L933 BasicCegarLoop]: 1396 mSDtfsCounter, 1241 mSDsluCounter, 4617 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1248 SdHoareTripleChecker+Valid, 5259 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:20:13,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1248 Valid, 5259 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1026 Invalid, 1 Unknown, 0 Unchecked, 6.2s Time] [2021-11-25 20:20:13,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18818 states. [2021-11-25 20:20:15,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18818 to 18812. [2021-11-25 20:20:15,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18812 states, 11656 states have (on average 1.269560741249142) internal successors, (14798), 12032 states have internal predecessors, (14798), 5588 states have call successors, (5588), 1591 states have call predecessors, (5588), 1565 states have return successors, (6566), 5352 states have call predecessors, (6566), 5582 states have call successors, (6566) [2021-11-25 20:20:15,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18812 states to 18812 states and 26952 transitions. [2021-11-25 20:20:15,310 INFO L78 Accepts]: Start accepts. Automaton has 18812 states and 26952 transitions. Word has length 175 [2021-11-25 20:20:15,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:20:15,311 INFO L470 AbstractCegarLoop]: Abstraction has 18812 states and 26952 transitions. [2021-11-25 20:20:15,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-25 20:20:15,311 INFO L276 IsEmpty]: Start isEmpty. Operand 18812 states and 26952 transitions. [2021-11-25 20:20:15,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-25 20:20:15,315 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:20:15,315 INFO L514 BasicCegarLoop]: trace histogram [14, 10, 10, 10, 10, 10, 10, 6, 5, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:20:15,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 20:20:15,316 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:20:15,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:20:15,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1360107069, now seen corresponding path program 1 times [2021-11-25 20:20:15,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:20:15,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088086781] [2021-11-25 20:20:15,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:15,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:20:15,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:15,567 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 515 trivial. 0 not checked. [2021-11-25 20:20:15,568 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:20:15,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088086781] [2021-11-25 20:20:15,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088086781] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:20:15,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:20:15,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:20:15,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887992400] [2021-11-25 20:20:15,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:20:15,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:20:15,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:20:15,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:20:15,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:20:15,573 INFO L87 Difference]: Start difference. First operand 18812 states and 26952 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 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) [2021-11-25 20:20:18,774 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:20:22,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:20:22,760 INFO L93 Difference]: Finished difference Result 18824 states and 26960 transitions. [2021-11-25 20:20:22,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:20:22,765 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 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 180 [2021-11-25 20:20:22,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:20:22,884 INFO L225 Difference]: With dead ends: 18824 [2021-11-25 20:20:22,885 INFO L226 Difference]: Without dead ends: 18822 [2021-11-25 20:20:22,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:20:22,896 INFO L933 BasicCegarLoop]: 1396 mSDtfsCounter, 1241 mSDsluCounter, 4617 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1247 SdHoareTripleChecker+Valid, 5259 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:20:22,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1247 Valid, 5259 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1026 Invalid, 1 Unknown, 0 Unchecked, 6.5s Time] [2021-11-25 20:20:22,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18822 states. [2021-11-25 20:20:24,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18822 to 18816. [2021-11-25 20:20:24,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18816 states, 11659 states have (on average 1.269491380049747) internal successors, (14801), 12035 states have internal predecessors, (14801), 5588 states have call successors, (5588), 1592 states have call predecessors, (5588), 1566 states have return successors, (6566), 5352 states have call predecessors, (6566), 5582 states have call successors, (6566) [2021-11-25 20:20:24,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18816 states to 18816 states and 26955 transitions. [2021-11-25 20:20:24,302 INFO L78 Accepts]: Start accepts. Automaton has 18816 states and 26955 transitions. Word has length 180 [2021-11-25 20:20:24,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:20:24,303 INFO L470 AbstractCegarLoop]: Abstraction has 18816 states and 26955 transitions. [2021-11-25 20:20:24,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 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) [2021-11-25 20:20:24,303 INFO L276 IsEmpty]: Start isEmpty. Operand 18816 states and 26955 transitions. [2021-11-25 20:20:24,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-25 20:20:24,329 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:20:24,329 INFO L514 BasicCegarLoop]: trace histogram [14, 10, 10, 10, 10, 10, 10, 7, 6, 6, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:20:24,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 20:20:24,330 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:20:24,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:20:24,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1739731821, now seen corresponding path program 1 times [2021-11-25 20:20:24,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:20:24,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899819412] [2021-11-25 20:20:24,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:24,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:20:24,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:24,631 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2021-11-25 20:20:24,631 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:20:24,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899819412] [2021-11-25 20:20:24,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899819412] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:20:24,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:20:24,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:20:24,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353819156] [2021-11-25 20:20:24,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:20:24,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:20:24,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:20:24,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:20:24,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:20:24,635 INFO L87 Difference]: Start difference. First operand 18816 states and 26955 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-25 20:20:28,028 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:20:31,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:20:31,751 INFO L93 Difference]: Finished difference Result 27365 states and 39040 transitions. [2021-11-25 20:20:31,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:20:31,756 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 185 [2021-11-25 20:20:31,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:20:31,866 INFO L225 Difference]: With dead ends: 27365 [2021-11-25 20:20:31,866 INFO L226 Difference]: Without dead ends: 27363 [2021-11-25 20:20:31,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:20:31,878 INFO L933 BasicCegarLoop]: 1361 mSDtfsCounter, 1068 mSDsluCounter, 4539 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1073 SdHoareTripleChecker+Valid, 5146 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:20:31,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1073 Valid, 5146 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1030 Invalid, 1 Unknown, 0 Unchecked, 6.1s Time] [2021-11-25 20:20:31,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27363 states. [2021-11-25 20:20:33,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27363 to 27345. [2021-11-25 20:20:33,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27345 states, 16923 states have (on average 1.2680966731666963) internal successors, (21460), 17506 states have internal predecessors, (21460), 8047 states have call successors, (8047), 2445 states have call predecessors, (8047), 2372 states have return successors, (9514), 7627 states have call predecessors, (9514), 8038 states have call successors, (9514) [2021-11-25 20:20:33,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27345 states to 27345 states and 39021 transitions. [2021-11-25 20:20:33,495 INFO L78 Accepts]: Start accepts. Automaton has 27345 states and 39021 transitions. Word has length 185 [2021-11-25 20:20:33,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:20:33,496 INFO L470 AbstractCegarLoop]: Abstraction has 27345 states and 39021 transitions. [2021-11-25 20:20:33,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-25 20:20:33,496 INFO L276 IsEmpty]: Start isEmpty. Operand 27345 states and 39021 transitions. [2021-11-25 20:20:33,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-11-25 20:20:33,502 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:20:33,502 INFO L514 BasicCegarLoop]: trace histogram [14, 10, 10, 10, 10, 10, 10, 8, 7, 7, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:20:33,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-25 20:20:33,502 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:20:33,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:20:33,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1873484267, now seen corresponding path program 1 times [2021-11-25 20:20:33,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:20:33,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911390373] [2021-11-25 20:20:33,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:33,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:20:33,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:33,753 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 585 trivial. 0 not checked. [2021-11-25 20:20:33,753 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:20:33,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911390373] [2021-11-25 20:20:33,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911390373] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:20:33,754 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:20:33,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:20:33,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937305139] [2021-11-25 20:20:33,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:20:33,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:20:33,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:20:33,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:20:33,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:20:33,756 INFO L87 Difference]: Start difference. First operand 27345 states and 39021 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-25 20:20:37,045 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:20:40,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:20:40,638 INFO L93 Difference]: Finished difference Result 27357 states and 39029 transitions. [2021-11-25 20:20:40,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:20:40,644 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 199 [2021-11-25 20:20:40,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:20:40,765 INFO L225 Difference]: With dead ends: 27357 [2021-11-25 20:20:40,766 INFO L226 Difference]: Without dead ends: 27355 [2021-11-25 20:20:40,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:20:40,780 INFO L933 BasicCegarLoop]: 1396 mSDtfsCounter, 1237 mSDsluCounter, 4617 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1241 SdHoareTripleChecker+Valid, 5259 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-11-25 20:20:40,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1241 Valid, 5259 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1026 Invalid, 1 Unknown, 0 Unchecked, 5.8s Time] [2021-11-25 20:20:40,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27355 states. [2021-11-25 20:20:42,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27355 to 27349. [2021-11-25 20:20:42,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27349 states, 16926 states have (on average 1.2680491551459294) internal successors, (21463), 17509 states have internal predecessors, (21463), 8047 states have call successors, (8047), 2446 states have call predecessors, (8047), 2373 states have return successors, (9514), 7627 states have call predecessors, (9514), 8038 states have call successors, (9514) [2021-11-25 20:20:42,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27349 states to 27349 states and 39024 transitions. [2021-11-25 20:20:42,343 INFO L78 Accepts]: Start accepts. Automaton has 27349 states and 39024 transitions. Word has length 199 [2021-11-25 20:20:42,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:20:42,344 INFO L470 AbstractCegarLoop]: Abstraction has 27349 states and 39024 transitions. [2021-11-25 20:20:42,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-25 20:20:42,344 INFO L276 IsEmpty]: Start isEmpty. Operand 27349 states and 39024 transitions. [2021-11-25 20:20:42,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-25 20:20:42,350 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:20:42,350 INFO L514 BasicCegarLoop]: trace histogram [15, 10, 10, 10, 10, 10, 10, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:20:42,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-25 20:20:42,351 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:20:42,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:20:42,351 INFO L85 PathProgramCache]: Analyzing trace with hash -290612860, now seen corresponding path program 1 times [2021-11-25 20:20:42,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:20:42,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888650968] [2021-11-25 20:20:42,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:42,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:20:42,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:42,565 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 510 trivial. 0 not checked. [2021-11-25 20:20:42,565 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:20:42,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888650968] [2021-11-25 20:20:42,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888650968] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:20:42,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:20:42,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:20:42,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625753841] [2021-11-25 20:20:42,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:20:42,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:20:42,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:20:42,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:20:42,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:20:42,569 INFO L87 Difference]: Start difference. First operand 27349 states and 39024 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-25 20:20:46,259 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:20:48,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:20:48,954 INFO L93 Difference]: Finished difference Result 65851 states and 94246 transitions. [2021-11-25 20:20:48,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:20:48,954 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 189 [2021-11-25 20:20:48,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:20:49,128 INFO L225 Difference]: With dead ends: 65851 [2021-11-25 20:20:49,128 INFO L226 Difference]: Without dead ends: 38584 [2021-11-25 20:20:49,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:20:49,211 INFO L933 BasicCegarLoop]: 2055 mSDtfsCounter, 1174 mSDsluCounter, 1330 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1174 SdHoareTripleChecker+Valid, 3146 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:20:49,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1174 Valid, 3146 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 740 Invalid, 1 Unknown, 0 Unchecked, 5.0s Time] [2021-11-25 20:20:49,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38584 states. [2021-11-25 20:20:51,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38584 to 38464. [2021-11-25 20:20:51,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38464 states, 23980 states have (on average 1.269724770642202) internal successors, (30448), 24806 states have internal predecessors, (30448), 11150 states have call successors, (11150), 3433 states have call predecessors, (11150), 3331 states have return successors, (13316), 10556 states have call predecessors, (13316), 11141 states have call successors, (13316) [2021-11-25 20:20:51,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38464 states to 38464 states and 54914 transitions. [2021-11-25 20:20:51,565 INFO L78 Accepts]: Start accepts. Automaton has 38464 states and 54914 transitions. Word has length 189 [2021-11-25 20:20:51,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:20:51,566 INFO L470 AbstractCegarLoop]: Abstraction has 38464 states and 54914 transitions. [2021-11-25 20:20:51,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-25 20:20:51,567 INFO L276 IsEmpty]: Start isEmpty. Operand 38464 states and 54914 transitions. [2021-11-25 20:20:51,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-11-25 20:20:51,570 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:20:51,570 INFO L514 BasicCegarLoop]: trace histogram [14, 10, 10, 10, 10, 10, 10, 9, 8, 8, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:20:51,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-25 20:20:51,571 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:20:51,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:20:51,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1699976485, now seen corresponding path program 1 times [2021-11-25 20:20:51,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:20:51,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829312211] [2021-11-25 20:20:51,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:51,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:20:51,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:51,831 INFO L134 CoverageAnalysis]: Checked inductivity of 629 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 613 trivial. 0 not checked. [2021-11-25 20:20:51,832 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:20:51,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829312211] [2021-11-25 20:20:51,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829312211] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:20:51,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:20:51,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:20:51,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181414425] [2021-11-25 20:20:51,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:20:51,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:20:51,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:20:51,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:20:51,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:20:51,835 INFO L87 Difference]: Start difference. First operand 38464 states and 54914 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-25 20:20:55,399 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:20:59,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:20:59,596 INFO L93 Difference]: Finished difference Result 38476 states and 54922 transitions. [2021-11-25 20:20:59,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:20:59,601 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 204 [2021-11-25 20:20:59,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:20:59,738 INFO L225 Difference]: With dead ends: 38476 [2021-11-25 20:20:59,739 INFO L226 Difference]: Without dead ends: 38474 [2021-11-25 20:20:59,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:20:59,753 INFO L933 BasicCegarLoop]: 1396 mSDtfsCounter, 1237 mSDsluCounter, 4617 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1240 SdHoareTripleChecker+Valid, 5259 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:20:59,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1240 Valid, 5259 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1026 Invalid, 1 Unknown, 0 Unchecked, 6.2s Time] [2021-11-25 20:20:59,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38474 states. [2021-11-25 20:21:01,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38474 to 38468. [2021-11-25 20:21:01,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38468 states, 23983 states have (on average 1.2696910311470626) internal successors, (30451), 24809 states have internal predecessors, (30451), 11150 states have call successors, (11150), 3434 states have call predecessors, (11150), 3332 states have return successors, (13316), 10556 states have call predecessors, (13316), 11141 states have call successors, (13316) [2021-11-25 20:21:01,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38468 states to 38468 states and 54917 transitions. [2021-11-25 20:21:01,967 INFO L78 Accepts]: Start accepts. Automaton has 38468 states and 54917 transitions. Word has length 204 [2021-11-25 20:21:01,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:01,969 INFO L470 AbstractCegarLoop]: Abstraction has 38468 states and 54917 transitions. [2021-11-25 20:21:01,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-25 20:21:01,970 INFO L276 IsEmpty]: Start isEmpty. Operand 38468 states and 54917 transitions. [2021-11-25 20:21:01,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-25 20:21:01,973 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:01,974 INFO L514 BasicCegarLoop]: trace histogram [14, 10, 10, 10, 10, 10, 10, 10, 9, 9, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:21:01,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-25 20:21:01,974 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:21:01,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:01,975 INFO L85 PathProgramCache]: Analyzing trace with hash -589586115, now seen corresponding path program 1 times [2021-11-25 20:21:01,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:01,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335762074] [2021-11-25 20:21:01,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:01,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:02,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:02,235 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 619 trivial. 0 not checked. [2021-11-25 20:21:02,236 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:02,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335762074] [2021-11-25 20:21:02,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335762074] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:02,237 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:02,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:21:02,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126742935] [2021-11-25 20:21:02,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:02,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:21:02,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:02,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:21:02,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:21:02,239 INFO L87 Difference]: Start difference. First operand 38468 states and 54917 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-25 20:21:05,571 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:21:09,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:09,359 INFO L93 Difference]: Finished difference Result 38480 states and 54925 transitions. [2021-11-25 20:21:09,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:21:09,363 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 200 [2021-11-25 20:21:09,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:09,659 INFO L225 Difference]: With dead ends: 38480 [2021-11-25 20:21:09,660 INFO L226 Difference]: Without dead ends: 38478 [2021-11-25 20:21:09,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:21:09,677 INFO L933 BasicCegarLoop]: 1396 mSDtfsCounter, 1241 mSDsluCounter, 4617 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1243 SdHoareTripleChecker+Valid, 5259 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:09,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1243 Valid, 5259 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1026 Invalid, 1 Unknown, 0 Unchecked, 5.7s Time] [2021-11-25 20:21:09,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38478 states. [2021-11-25 20:21:11,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38478 to 38472. [2021-11-25 20:21:11,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38472 states, 23986 states have (on average 1.2696573000917202) internal successors, (30454), 24812 states have internal predecessors, (30454), 11150 states have call successors, (11150), 3435 states have call predecessors, (11150), 3333 states have return successors, (13316), 10556 states have call predecessors, (13316), 11141 states have call successors, (13316) [2021-11-25 20:21:11,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38472 states to 38472 states and 54920 transitions. [2021-11-25 20:21:11,984 INFO L78 Accepts]: Start accepts. Automaton has 38472 states and 54920 transitions. Word has length 200 [2021-11-25 20:21:11,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:11,985 INFO L470 AbstractCegarLoop]: Abstraction has 38472 states and 54920 transitions. [2021-11-25 20:21:11,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-25 20:21:11,986 INFO L276 IsEmpty]: Start isEmpty. Operand 38472 states and 54920 transitions. [2021-11-25 20:21:12,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-11-25 20:21:12,002 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:12,002 INFO L514 BasicCegarLoop]: trace histogram [14, 11, 10, 10, 10, 10, 10, 10, 10, 10, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:21:12,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-25 20:21:12,003 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:21:12,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:12,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1601765229, now seen corresponding path program 1 times [2021-11-25 20:21:12,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:12,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356876287] [2021-11-25 20:21:12,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:12,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:12,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:12,263 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 655 trivial. 0 not checked. [2021-11-25 20:21:12,264 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:12,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356876287] [2021-11-25 20:21:12,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356876287] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:12,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:12,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:21:12,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988866730] [2021-11-25 20:21:12,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:12,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:21:12,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:12,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:21:12,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:21:12,267 INFO L87 Difference]: Start difference. First operand 38472 states and 54920 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-25 20:21:15,599 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:21:19,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:19,292 INFO L93 Difference]: Finished difference Result 38484 states and 54928 transitions. [2021-11-25 20:21:19,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:21:19,297 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 205 [2021-11-25 20:21:19,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:19,455 INFO L225 Difference]: With dead ends: 38484 [2021-11-25 20:21:19,455 INFO L226 Difference]: Without dead ends: 38480 [2021-11-25 20:21:19,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:21:19,474 INFO L933 BasicCegarLoop]: 1396 mSDtfsCounter, 1241 mSDsluCounter, 4617 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1242 SdHoareTripleChecker+Valid, 5259 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:19,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1242 Valid, 5259 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1026 Invalid, 1 Unknown, 0 Unchecked, 5.6s Time] [2021-11-25 20:21:19,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38480 states. [2021-11-25 20:21:21,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38480 to 38474. [2021-11-25 20:21:21,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38474 states, 23988 states have (on average 1.2695931298982825) internal successors, (30455), 24813 states have internal predecessors, (30455), 11150 states have call successors, (11150), 3436 states have call predecessors, (11150), 3333 states have return successors, (13316), 10556 states have call predecessors, (13316), 11141 states have call successors, (13316) [2021-11-25 20:21:21,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38474 states to 38474 states and 54921 transitions. [2021-11-25 20:21:21,376 INFO L78 Accepts]: Start accepts. Automaton has 38474 states and 54921 transitions. Word has length 205 [2021-11-25 20:21:21,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:21,377 INFO L470 AbstractCegarLoop]: Abstraction has 38474 states and 54921 transitions. [2021-11-25 20:21:21,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-25 20:21:21,377 INFO L276 IsEmpty]: Start isEmpty. Operand 38474 states and 54921 transitions. [2021-11-25 20:21:21,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-25 20:21:21,381 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:21,381 INFO L514 BasicCegarLoop]: trace histogram [14, 12, 11, 11, 10, 10, 10, 10, 10, 10, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:21:21,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-25 20:21:21,382 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:21:21,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:21,382 INFO L85 PathProgramCache]: Analyzing trace with hash 519888573, now seen corresponding path program 1 times [2021-11-25 20:21:21,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:21,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91724383] [2021-11-25 20:21:21,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:21,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:21,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:21,581 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 695 trivial. 0 not checked. [2021-11-25 20:21:21,581 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:21,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91724383] [2021-11-25 20:21:21,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91724383] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:21,582 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:21,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:21:21,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143212555] [2021-11-25 20:21:21,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:21,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:21:21,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:21,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:21:21,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:21:21,584 INFO L87 Difference]: Start difference. First operand 38474 states and 54921 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-25 20:21:25,342 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:21:29,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:29,495 INFO L93 Difference]: Finished difference Result 38480 states and 54924 transitions. [2021-11-25 20:21:29,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:21:29,500 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 210 [2021-11-25 20:21:29,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:29,716 INFO L225 Difference]: With dead ends: 38480 [2021-11-25 20:21:29,716 INFO L226 Difference]: Without dead ends: 38294 [2021-11-25 20:21:29,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:21:29,751 INFO L933 BasicCegarLoop]: 1396 mSDtfsCounter, 1237 mSDsluCounter, 4619 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1237 SdHoareTripleChecker+Valid, 5261 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:29,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1237 Valid, 5261 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1022 Invalid, 1 Unknown, 0 Unchecked, 6.4s Time] [2021-11-25 20:21:29,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38294 states. [2021-11-25 20:21:32,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38294 to 38290. [2021-11-25 20:21:32,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38290 states, 23926 states have (on average 1.2682855471035694) internal successors, (30345), 24704 states have internal predecessors, (30345), 11040 states have call successors, (11040), 3422 states have call predecessors, (11040), 3321 states have return successors, (13209), 10495 states have call predecessors, (13209), 11034 states have call successors, (13209) [2021-11-25 20:21:32,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38290 states to 38290 states and 54594 transitions. [2021-11-25 20:21:32,449 INFO L78 Accepts]: Start accepts. Automaton has 38290 states and 54594 transitions. Word has length 210 [2021-11-25 20:21:32,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:32,450 INFO L470 AbstractCegarLoop]: Abstraction has 38290 states and 54594 transitions. [2021-11-25 20:21:32,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-25 20:21:32,450 INFO L276 IsEmpty]: Start isEmpty. Operand 38290 states and 54594 transitions. [2021-11-25 20:21:32,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-11-25 20:21:32,454 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:32,455 INFO L514 BasicCegarLoop]: trace histogram [17, 10, 10, 10, 10, 10, 10, 7, 7, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:21:32,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-25 20:21:32,455 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:21:32,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:32,456 INFO L85 PathProgramCache]: Analyzing trace with hash -24560604, now seen corresponding path program 1 times [2021-11-25 20:21:32,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:32,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13089439] [2021-11-25 20:21:32,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:32,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:32,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:32,729 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 622 trivial. 0 not checked. [2021-11-25 20:21:32,729 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:32,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13089439] [2021-11-25 20:21:32,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13089439] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:32,730 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:32,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:21:32,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006480257] [2021-11-25 20:21:32,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:32,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:21:32,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:32,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:21:32,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:21:32,734 INFO L87 Difference]: Start difference. First operand 38290 states and 54594 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2021-11-25 20:21:36,427 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:21:39,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:39,612 INFO L93 Difference]: Finished difference Result 88037 states and 124712 transitions. [2021-11-25 20:21:39,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:21:39,612 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) Word has length 230 [2021-11-25 20:21:39,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:39,924 INFO L225 Difference]: With dead ends: 88037 [2021-11-25 20:21:39,924 INFO L226 Difference]: Without dead ends: 49829 [2021-11-25 20:21:40,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:21:40,075 INFO L933 BasicCegarLoop]: 1461 mSDtfsCounter, 1239 mSDsluCounter, 1081 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 26 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1239 SdHoareTripleChecker+Valid, 2353 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:40,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1239 Valid, 2353 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 509 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2021-11-25 20:21:40,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49829 states. [2021-11-25 20:21:43,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49829 to 49757. [2021-11-25 20:21:43,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49757 states, 30857 states have (on average 1.2651586349936805) internal successors, (39039), 31928 states have internal predecessors, (39039), 14421 states have call successors, (14421), 4604 states have call predecessors, (14421), 4476 states have return successors, (16629), 13678 states have call predecessors, (16629), 14415 states have call successors, (16629) [2021-11-25 20:21:43,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49757 states to 49757 states and 70089 transitions. [2021-11-25 20:21:43,363 INFO L78 Accepts]: Start accepts. Automaton has 49757 states and 70089 transitions. Word has length 230 [2021-11-25 20:21:43,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:43,363 INFO L470 AbstractCegarLoop]: Abstraction has 49757 states and 70089 transitions. [2021-11-25 20:21:43,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2021-11-25 20:21:43,364 INFO L276 IsEmpty]: Start isEmpty. Operand 49757 states and 70089 transitions. [2021-11-25 20:21:43,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-11-25 20:21:43,371 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:43,372 INFO L514 BasicCegarLoop]: trace histogram [18, 10, 10, 10, 10, 10, 10, 7, 7, 5, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:21:43,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-25 20:21:43,373 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:21:43,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:43,373 INFO L85 PathProgramCache]: Analyzing trace with hash -55106340, now seen corresponding path program 1 times [2021-11-25 20:21:43,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:43,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737316748] [2021-11-25 20:21:43,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:43,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:43,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:43,615 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 656 trivial. 0 not checked. [2021-11-25 20:21:43,615 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:43,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737316748] [2021-11-25 20:21:43,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737316748] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:43,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:43,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:21:43,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056140859] [2021-11-25 20:21:43,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:43,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:21:43,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:43,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:21:43,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:21:43,619 INFO L87 Difference]: Start difference. First operand 49757 states and 70089 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-25 20:21:47,489 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []