./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-dlink-sundance.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a1578d1-ba01-4499-a051-3535472e19a7/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a1578d1-ba01-4499-a051-3535472e19a7/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a1578d1-ba01-4499-a051-3535472e19a7/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a1578d1-ba01-4499-a051-3535472e19a7/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dlink-sundance.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a1578d1-ba01-4499-a051-3535472e19a7/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a1578d1-ba01-4499-a051-3535472e19a7/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash d4784d7b609e947942ffa9f8266acf243583adf996e2bcae78fb9e8c8fa71002 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:48:20,278 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:48:20,280 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:48:20,319 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:48:20,320 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:48:20,321 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:48:20,323 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:48:20,325 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:48:20,328 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:48:20,329 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:48:20,330 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:48:20,332 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:48:20,333 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:48:20,334 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:48:20,336 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:48:20,338 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:48:20,339 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:48:20,341 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:48:20,343 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:48:20,346 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:48:20,348 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:48:20,349 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:48:20,351 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:48:20,353 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:48:20,357 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:48:20,357 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:48:20,358 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:48:20,359 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:48:20,360 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:48:20,361 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:48:20,362 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:48:20,363 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:48:20,365 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:48:20,366 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:48:20,367 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:48:20,368 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:48:20,369 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:48:20,370 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:48:20,370 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:48:20,371 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:48:20,372 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:48:20,373 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a1578d1-ba01-4499-a051-3535472e19a7/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-21 00:48:20,405 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:48:20,405 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:48:20,405 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:48:20,406 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:48:20,406 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:48:20,407 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:48:20,407 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:48:20,407 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:48:20,407 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:48:20,408 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:48:20,408 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:48:20,408 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:48:20,408 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:48:20,409 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:48:20,409 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:48:20,409 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:48:20,409 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:48:20,409 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:48:20,410 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:48:20,411 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:48:20,411 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:48:20,411 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:48:20,411 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:48:20,412 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:48:20,412 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:48:20,412 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:48:20,412 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:48:20,413 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:48:20,413 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:48:20,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:48:20,413 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:48:20,414 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:48:20,414 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:48:20,414 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:48:20,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:48:20,415 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:48:20,415 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:48:20,415 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:48:20,415 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_8a1578d1-ba01-4499-a051-3535472e19a7/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a1578d1-ba01-4499-a051-3535472e19a7/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d4784d7b609e947942ffa9f8266acf243583adf996e2bcae78fb9e8c8fa71002 [2021-11-21 00:48:20,696 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:48:20,735 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:48:20,738 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:48:20,740 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:48:20,743 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:48:20,745 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a1578d1-ba01-4499-a051-3535472e19a7/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dlink-sundance.cil.i [2021-11-21 00:48:20,832 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a1578d1-ba01-4499-a051-3535472e19a7/bin/utaipan-TEXQjIfE4P/data/c1e6a96a0/765c19c84c4742788432acb216002d65/FLAG3f5d71489 [2021-11-21 00:48:21,770 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:48:21,770 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a1578d1-ba01-4499-a051-3535472e19a7/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dlink-sundance.cil.i [2021-11-21 00:48:21,842 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a1578d1-ba01-4499-a051-3535472e19a7/bin/utaipan-TEXQjIfE4P/data/c1e6a96a0/765c19c84c4742788432acb216002d65/FLAG3f5d71489 [2021-11-21 00:48:22,159 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a1578d1-ba01-4499-a051-3535472e19a7/bin/utaipan-TEXQjIfE4P/data/c1e6a96a0/765c19c84c4742788432acb216002d65 [2021-11-21 00:48:22,163 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:48:22,165 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:48:22,170 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:48:22,171 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:48:22,175 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:48:22,176 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:48:22" (1/1) ... [2021-11-21 00:48:22,178 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@784960bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:48:22, skipping insertion in model container [2021-11-21 00:48:22,179 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:48:22" (1/1) ... [2021-11-21 00:48:22,189 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:48:22,393 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:48:25,472 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_8a1578d1-ba01-4499-a051-3535472e19a7/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dlink-sundance.cil.i[349228,349241] [2021-11-21 00:48:25,475 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_8a1578d1-ba01-4499-a051-3535472e19a7/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dlink-sundance.cil.i[349397,349410] [2021-11-21 00:48:25,476 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_8a1578d1-ba01-4499-a051-3535472e19a7/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dlink-sundance.cil.i[349564,349577] [2021-11-21 00:48:25,477 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_8a1578d1-ba01-4499-a051-3535472e19a7/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dlink-sundance.cil.i[349732,349745] [2021-11-21 00:48:25,500 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:48:25,549 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:48:26,042 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_8a1578d1-ba01-4499-a051-3535472e19a7/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dlink-sundance.cil.i[349228,349241] [2021-11-21 00:48:26,042 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_8a1578d1-ba01-4499-a051-3535472e19a7/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dlink-sundance.cil.i[349397,349410] [2021-11-21 00:48:26,043 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_8a1578d1-ba01-4499-a051-3535472e19a7/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dlink-sundance.cil.i[349564,349577] [2021-11-21 00:48:26,043 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_8a1578d1-ba01-4499-a051-3535472e19a7/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dlink-sundance.cil.i[349732,349745] [2021-11-21 00:48:26,054 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:48:26,337 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:48:26,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:48:26 WrapperNode [2021-11-21 00:48:26,338 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:48:26,339 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:48:26,340 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:48:26,340 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:48:26,348 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:48:26" (1/1) ... [2021-11-21 00:48:26,486 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:48:26" (1/1) ... [2021-11-21 00:48:26,697 INFO L137 Inliner]: procedures = 470, calls = 2162, calls flagged for inlining = 234, calls inlined = 217, statements flattened = 5446 [2021-11-21 00:48:26,698 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:48:26,698 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:48:26,699 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:48:26,700 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:48:26,715 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:48:26" (1/1) ... [2021-11-21 00:48:26,715 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:48:26" (1/1) ... [2021-11-21 00:48:26,760 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:48:26" (1/1) ... [2021-11-21 00:48:26,761 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:48:26" (1/1) ... [2021-11-21 00:48:26,997 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:48:26" (1/1) ... [2021-11-21 00:48:27,027 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:48:26" (1/1) ... [2021-11-21 00:48:27,051 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:48:26" (1/1) ... [2021-11-21 00:48:27,079 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:48:27,080 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:48:27,080 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:48:27,080 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:48:27,081 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:48:26" (1/1) ... [2021-11-21 00:48:27,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:48:27,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a1578d1-ba01-4499-a051-3535472e19a7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:48:27,118 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a1578d1-ba01-4499-a051-3535472e19a7/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:48:27,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a1578d1-ba01-4499-a051-3535472e19a7/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:48:27,169 INFO L130 BoogieDeclarations]: Found specification of procedure check_if_running [2021-11-21 00:48:27,169 INFO L138 BoogieDeclarations]: Found implementation of procedure check_if_running [2021-11-21 00:48:27,170 INFO L130 BoogieDeclarations]: Found specification of procedure mdio_write [2021-11-21 00:48:27,170 INFO L138 BoogieDeclarations]: Found implementation of procedure mdio_write [2021-11-21 00:48:27,170 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2021-11-21 00:48:27,170 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2021-11-21 00:48:27,170 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-21 00:48:27,170 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-21 00:48:27,171 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_alloc_skb [2021-11-21 00:48:27,171 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_alloc_skb [2021-11-21 00:48:27,171 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-21 00:48:27,171 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-21 00:48:27,171 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-21 00:48:27,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-21 00:48:27,172 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-21 00:48:27,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-21 00:48:27,172 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2021-11-21 00:48:27,172 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2021-11-21 00:48:27,172 INFO L130 BoogieDeclarations]: Found specification of procedure iowrite16 [2021-11-21 00:48:27,173 INFO L138 BoogieDeclarations]: Found implementation of procedure iowrite16 [2021-11-21 00:48:27,173 INFO L130 BoogieDeclarations]: Found specification of procedure iowrite8 [2021-11-21 00:48:27,173 INFO L138 BoogieDeclarations]: Found implementation of procedure iowrite8 [2021-11-21 00:48:27,173 INFO L130 BoogieDeclarations]: Found specification of procedure reset_tx [2021-11-21 00:48:27,173 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_tx [2021-11-21 00:48:27,173 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_66 [2021-11-21 00:48:27,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_66 [2021-11-21 00:48:27,174 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irq_76 [2021-11-21 00:48:27,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irq_76 [2021-11-21 00:48:27,174 INFO L130 BoogieDeclarations]: Found specification of procedure ioread32 [2021-11-21 00:48:27,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ioread32 [2021-11-21 00:48:27,174 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-21 00:48:27,175 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-21 00:48:27,175 INFO L130 BoogieDeclarations]: Found specification of procedure pci_get_drvdata [2021-11-21 00:48:27,175 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_get_drvdata [2021-11-21 00:48:27,175 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-21 00:48:27,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-21 00:48:27,176 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-11-21 00:48:27,176 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-11-21 00:48:27,176 INFO L130 BoogieDeclarations]: Found specification of procedure iowrite32 [2021-11-21 00:48:27,176 INFO L138 BoogieDeclarations]: Found implementation of procedure iowrite32 [2021-11-21 00:48:27,177 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-21 00:48:27,177 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-21 00:48:27,177 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-21 00:48:27,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-21 00:48:27,179 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-21 00:48:27,179 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-21 00:48:27,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 00:48:27,179 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_69 [2021-11-21 00:48:27,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_69 [2021-11-21 00:48:27,180 INFO L130 BoogieDeclarations]: Found specification of procedure netif_queue_stopped [2021-11-21 00:48:27,180 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_queue_stopped [2021-11-21 00:48:27,180 INFO L130 BoogieDeclarations]: Found specification of procedure tasklet_init [2021-11-21 00:48:27,181 INFO L138 BoogieDeclarations]: Found implementation of procedure tasklet_init [2021-11-21 00:48:27,181 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-21 00:48:27,181 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-21 00:48:27,182 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-21 00:48:27,182 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-21 00:48:27,182 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-21 00:48:27,182 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_netdev [2021-11-21 00:48:27,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_netdev [2021-11-21 00:48:27,183 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-21 00:48:27,183 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-21 00:48:27,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-21 00:48:27,183 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-21 00:48:27,184 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-21 00:48:27,184 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 00:48:27,184 INFO L130 BoogieDeclarations]: Found specification of procedure set_rx_mode [2021-11-21 00:48:27,185 INFO L138 BoogieDeclarations]: Found implementation of procedure set_rx_mode [2021-11-21 00:48:27,185 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2021-11-21 00:48:27,185 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2021-11-21 00:48:27,185 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-21 00:48:27,185 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-21 00:48:27,186 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_interrupt_context [2021-11-21 00:48:27,186 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_interrupt_context [2021-11-21 00:48:27,186 INFO L130 BoogieDeclarations]: Found specification of procedure check_duplex [2021-11-21 00:48:27,186 INFO L138 BoogieDeclarations]: Found implementation of procedure check_duplex [2021-11-21 00:48:27,186 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2021-11-21 00:48:27,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2021-11-21 00:48:27,187 INFO L130 BoogieDeclarations]: Found specification of procedure pci_choose_state [2021-11-21 00:48:27,187 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_choose_state [2021-11-21 00:48:27,188 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2021-11-21 00:48:27,188 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2021-11-21 00:48:27,188 INFO L130 BoogieDeclarations]: Found specification of procedure tx_timeout [2021-11-21 00:48:27,189 INFO L138 BoogieDeclarations]: Found implementation of procedure tx_timeout [2021-11-21 00:48:27,189 INFO L130 BoogieDeclarations]: Found specification of procedure sundance_resume [2021-11-21 00:48:27,189 INFO L138 BoogieDeclarations]: Found implementation of procedure sundance_resume [2021-11-21 00:48:27,190 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-21 00:48:27,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-21 00:48:27,191 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 00:48:27,191 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_1 [2021-11-21 00:48:27,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_1 [2021-11-21 00:48:27,191 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_0 [2021-11-21 00:48:27,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_0 [2021-11-21 00:48:27,192 INFO L130 BoogieDeclarations]: Found specification of procedure dma_map_single_attrs [2021-11-21 00:48:27,192 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_map_single_attrs [2021-11-21 00:48:27,192 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:48:27,192 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-21 00:48:27,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-21 00:48:27,193 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-21 00:48:27,193 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-21 00:48:27,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 00:48:27,193 INFO L130 BoogieDeclarations]: Found specification of procedure ioread16 [2021-11-21 00:48:27,194 INFO L138 BoogieDeclarations]: Found implementation of procedure ioread16 [2021-11-21 00:48:27,194 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-21 00:48:27,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-21 00:48:27,195 INFO L130 BoogieDeclarations]: Found specification of procedure tasklet_schedule [2021-11-21 00:48:27,198 INFO L138 BoogieDeclarations]: Found implementation of procedure tasklet_schedule [2021-11-21 00:48:27,198 INFO L130 BoogieDeclarations]: Found specification of procedure ioread8 [2021-11-21 00:48:27,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ioread8 [2021-11-21 00:48:27,198 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~TO~VOID [2021-11-21 00:48:27,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~TO~VOID [2021-11-21 00:48:27,200 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_spin_lock [2021-11-21 00:48:27,200 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_spin_lock [2021-11-21 00:48:27,200 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-21 00:48:27,200 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-21 00:48:27,206 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2021-11-21 00:48:27,207 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2021-11-21 00:48:27,207 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2021-11-21 00:48:27,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2021-11-21 00:48:27,207 INFO L130 BoogieDeclarations]: Found specification of procedure __set_mac_addr [2021-11-21 00:48:27,208 INFO L138 BoogieDeclarations]: Found implementation of procedure __set_mac_addr [2021-11-21 00:48:27,208 INFO L130 BoogieDeclarations]: Found specification of procedure mdio_read [2021-11-21 00:48:27,208 INFO L138 BoogieDeclarations]: Found implementation of procedure mdio_read [2021-11-21 00:48:27,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:48:27,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:48:27,208 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_EMGentry_exit_sundance_exit_14_2 [2021-11-21 00:48:27,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_EMGentry_exit_sundance_exit_14_2 [2021-11-21 00:48:27,209 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-21 00:48:27,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-21 00:48:27,209 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-21 00:48:27,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-21 00:48:27,209 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_close [2021-11-21 00:48:27,209 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_close [2021-11-21 00:48:27,210 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-21 00:48:27,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-21 00:48:27,210 INFO L130 BoogieDeclarations]: Found specification of procedure get_stats [2021-11-21 00:48:27,210 INFO L138 BoogieDeclarations]: Found implementation of procedure get_stats [2021-11-21 00:48:27,210 INFO L130 BoogieDeclarations]: Found specification of procedure sundance_poll_controller [2021-11-21 00:48:27,210 INFO L138 BoogieDeclarations]: Found implementation of procedure sundance_poll_controller [2021-11-21 00:48:27,210 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_process_context [2021-11-21 00:48:27,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_process_context [2021-11-21 00:48:27,211 INFO L130 BoogieDeclarations]: Found specification of procedure nway_reset [2021-11-21 00:48:27,211 INFO L138 BoogieDeclarations]: Found implementation of procedure nway_reset [2021-11-21 00:48:27,211 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_lock_of_netdev_private [2021-11-21 00:48:27,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_lock_of_netdev_private [2021-11-21 00:48:27,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-21 00:48:27,212 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-21 00:48:27,212 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-21 00:48:27,212 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-21 00:48:27,212 INFO L130 BoogieDeclarations]: Found specification of procedure tasklet_kill [2021-11-21 00:48:27,212 INFO L138 BoogieDeclarations]: Found implementation of procedure tasklet_kill [2021-11-21 00:48:27,212 INFO L130 BoogieDeclarations]: Found specification of procedure dma_unmap_single_attrs [2021-11-21 00:48:27,212 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_unmap_single_attrs [2021-11-21 00:48:27,213 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2021-11-21 00:48:27,213 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2021-11-21 00:48:27,213 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 00:48:27,213 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-11-21 00:48:27,213 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-11-21 00:48:27,213 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_irq_75 [2021-11-21 00:48:27,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_irq_75 [2021-11-21 00:48:27,214 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 00:48:27,214 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2021-11-21 00:48:27,214 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2021-11-21 00:48:27,214 INFO L130 BoogieDeclarations]: Found specification of procedure pci_enable_wake [2021-11-21 00:48:27,214 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_enable_wake [2021-11-21 00:48:27,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 00:48:27,215 INFO L130 BoogieDeclarations]: Found specification of procedure intr_handler [2021-11-21 00:48:27,215 INFO L138 BoogieDeclarations]: Found implementation of procedure intr_handler [2021-11-21 00:48:27,215 INFO L130 BoogieDeclarations]: Found specification of procedure dma_mapping_error [2021-11-21 00:48:27,215 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_mapping_error [2021-11-21 00:48:27,215 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-21 00:48:27,215 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-21 00:48:27,215 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_lock_of_netdev_private [2021-11-21 00:48:27,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_lock_of_netdev_private [2021-11-21 00:48:27,216 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-21 00:48:27,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-21 00:48:27,216 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_irq [2021-11-21 00:48:27,216 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_irq [2021-11-21 00:48:27,216 INFO L130 BoogieDeclarations]: Found specification of procedure mdio_sync [2021-11-21 00:48:27,218 INFO L138 BoogieDeclarations]: Found implementation of procedure mdio_sync [2021-11-21 00:48:27,218 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_open [2021-11-21 00:48:27,219 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_open [2021-11-21 00:48:27,219 INFO L130 BoogieDeclarations]: Found specification of procedure sundance_reset [2021-11-21 00:48:27,219 INFO L138 BoogieDeclarations]: Found implementation of procedure sundance_reset [2021-11-21 00:48:27,219 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reserve [2021-11-21 00:48:27,219 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reserve [2021-11-21 00:48:27,219 INFO L130 BoogieDeclarations]: Found specification of procedure dma_free_attrs [2021-11-21 00:48:27,219 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_free_attrs [2021-11-21 00:48:27,220 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-11-21 00:48:27,220 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-11-21 00:48:27,220 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-21 00:48:27,220 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-21 00:48:27,220 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-21 00:48:27,220 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-21 00:48:27,220 INFO L130 BoogieDeclarations]: Found specification of procedure sundance_remove1 [2021-11-21 00:48:27,221 INFO L138 BoogieDeclarations]: Found implementation of procedure sundance_remove1 [2021-11-21 00:48:27,221 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_70 [2021-11-21 00:48:27,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_70 [2021-11-21 00:48:27,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 00:48:27,221 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-21 00:48:27,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-21 00:48:27,222 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2021-11-21 00:48:27,222 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2021-11-21 00:48:27,222 INFO L130 BoogieDeclarations]: Found specification of procedure refill_rx [2021-11-21 00:48:27,222 INFO L138 BoogieDeclarations]: Found implementation of procedure refill_rx [2021-11-21 00:48:27,222 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-21 00:48:27,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-21 00:48:27,222 INFO L130 BoogieDeclarations]: Found specification of procedure pci_iounmap [2021-11-21 00:48:27,223 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_iounmap [2021-11-21 00:48:27,223 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_power_state [2021-11-21 00:48:27,223 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_power_state [2021-11-21 00:48:27,223 INFO L130 BoogieDeclarations]: Found specification of procedure dma_alloc_attrs [2021-11-21 00:48:27,223 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_alloc_attrs [2021-11-21 00:48:27,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:48:27,224 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-21 00:48:27,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-21 00:48:27,224 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_netdev [2021-11-21 00:48:27,224 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_netdev [2021-11-21 00:48:28,223 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:48:28,230 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:48:28,896 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-21 00:49:33,475 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-21 00:49:33,581 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:49:35,308 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:49:35,309 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-21 00:49:35,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:49:35 BoogieIcfgContainer [2021-11-21 00:49:35,315 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:49:35,319 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:49:35,319 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:49:35,324 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:49:35,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:48:22" (1/3) ... [2021-11-21 00:49:35,325 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d95ea35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:49:35, skipping insertion in model container [2021-11-21 00:49:35,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:48:26" (2/3) ... [2021-11-21 00:49:35,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d95ea35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:49:35, skipping insertion in model container [2021-11-21 00:49:35,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:49:35" (3/3) ... [2021-11-21 00:49:35,332 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dlink-sundance.cil.i [2021-11-21 00:49:35,345 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:49:35,346 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-21 00:49:35,425 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:49:35,443 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 00:49:35,451 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-21 00:49:35,513 INFO L276 IsEmpty]: Start isEmpty. Operand has 1433 states, 823 states have (on average 1.2843256379100851) internal successors, (1057), 861 states have internal predecessors, (1057), 511 states have call successors, (511), 101 states have call predecessors, (511), 100 states have return successors, (505), 498 states have call predecessors, (505), 505 states have call successors, (505) [2021-11-21 00:49:35,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-21 00:49:35,535 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:49:35,536 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:49:35,536 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 00:49:35,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:49:35,542 INFO L85 PathProgramCache]: Analyzing trace with hash -147284711, now seen corresponding path program 1 times [2021-11-21 00:49:35,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:49:35,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60625719] [2021-11-21 00:49:35,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:49:35,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:49:36,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:49:36,527 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2021-11-21 00:49:36,527 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:49:36,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60625719] [2021-11-21 00:49:36,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60625719] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:49:36,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:49:36,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:49:36,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700256797] [2021-11-21 00:49:36,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:49:36,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:49:36,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:49:36,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:49:36,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:49:36,587 INFO L87 Difference]: Start difference. First operand has 1433 states, 823 states have (on average 1.2843256379100851) internal successors, (1057), 861 states have internal predecessors, (1057), 511 states have call successors, (511), 101 states have call predecessors, (511), 100 states have return successors, (505), 498 states have call predecessors, (505), 505 states have call successors, (505) Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-21 00:49:38,717 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:49:43,422 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:49:45,677 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:49:47,766 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:49:47,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:49:47,913 INFO L93 Difference]: Finished difference Result 4144 states and 6095 transitions. [2021-11-21 00:49:47,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:49:47,917 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 151 [2021-11-21 00:49:47,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:49:47,966 INFO L225 Difference]: With dead ends: 4144 [2021-11-21 00:49:47,966 INFO L226 Difference]: Without dead ends: 2728 [2021-11-21 00:49:47,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:49:47,987 INFO L933 BasicCegarLoop]: 2213 mSDtfsCounter, 1914 mSDsluCounter, 1997 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 7 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1914 SdHoareTripleChecker+Valid, 3932 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2021-11-21 00:49:47,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1914 Valid, 3932 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 591 Invalid, 3 Unknown, 0 Unchecked, 10.9s Time] [2021-11-21 00:49:48,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2728 states. [2021-11-21 00:49:48,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2728 to 2723. [2021-11-21 00:49:48,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2723 states, 1569 states have (on average 1.278521351179095) internal successors, (2006), 1637 states have internal predecessors, (2006), 955 states have call successors, (955), 197 states have call predecessors, (955), 196 states have return successors, (951), 936 states have call predecessors, (951), 951 states have call successors, (951) [2021-11-21 00:49:48,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2723 states to 2723 states and 3912 transitions. [2021-11-21 00:49:48,310 INFO L78 Accepts]: Start accepts. Automaton has 2723 states and 3912 transitions. Word has length 151 [2021-11-21 00:49:48,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:49:48,314 INFO L470 AbstractCegarLoop]: Abstraction has 2723 states and 3912 transitions. [2021-11-21 00:49:48,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-21 00:49:48,316 INFO L276 IsEmpty]: Start isEmpty. Operand 2723 states and 3912 transitions. [2021-11-21 00:49:48,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-21 00:49:48,338 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:49:48,339 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:49:48,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:49:48,340 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 00:49:48,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:49:48,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1126243917, now seen corresponding path program 1 times [2021-11-21 00:49:48,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:49:48,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728102510] [2021-11-21 00:49:48,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:49:48,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:49:48,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:49:48,862 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2021-11-21 00:49:48,864 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:49:48,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728102510] [2021-11-21 00:49:48,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728102510] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:49:48,868 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:49:48,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:49:48,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143791402] [2021-11-21 00:49:48,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:49:48,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:49:48,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:49:48,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:49:48,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:49:48,873 INFO L87 Difference]: Start difference. First operand 2723 states and 3912 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-21 00:49:50,948 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:49:54,807 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:49:59,304 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:49:59,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:49:59,354 INFO L93 Difference]: Finished difference Result 7652 states and 10938 transitions. [2021-11-21 00:49:59,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:49:59,356 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 159 [2021-11-21 00:49:59,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:49:59,407 INFO L225 Difference]: With dead ends: 7652 [2021-11-21 00:49:59,407 INFO L226 Difference]: Without dead ends: 4956 [2021-11-21 00:49:59,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:49:59,424 INFO L933 BasicCegarLoop]: 2152 mSDtfsCounter, 1627 mSDsluCounter, 1922 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 7 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1627 SdHoareTripleChecker+Valid, 3827 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:49:59,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1627 Valid, 3827 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 616 Invalid, 3 Unknown, 0 Unchecked, 10.1s Time] [2021-11-21 00:49:59,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4956 states. [2021-11-21 00:49:59,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4956 to 4926. [2021-11-21 00:49:59,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4926 states, 2816 states have (on average 1.2638494318181819) internal successors, (3559), 2945 states have internal predecessors, (3559), 1728 states have call successors, (1728), 382 states have call predecessors, (1728), 379 states have return successors, (1730), 1686 states have call predecessors, (1730), 1724 states have call successors, (1730) [2021-11-21 00:49:59,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4926 states to 4926 states and 7017 transitions. [2021-11-21 00:49:59,739 INFO L78 Accepts]: Start accepts. Automaton has 4926 states and 7017 transitions. Word has length 159 [2021-11-21 00:49:59,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:49:59,740 INFO L470 AbstractCegarLoop]: Abstraction has 4926 states and 7017 transitions. [2021-11-21 00:49:59,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-21 00:49:59,740 INFO L276 IsEmpty]: Start isEmpty. Operand 4926 states and 7017 transitions. [2021-11-21 00:49:59,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-21 00:49:59,745 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:49:59,746 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:49:59,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 00:49:59,746 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)] === [2021-11-21 00:49:59,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:49:59,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1707911413, now seen corresponding path program 1 times [2021-11-21 00:49:59,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:49:59,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519574168] [2021-11-21 00:49:59,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:49:59,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:49:59,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:50:00,120 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2021-11-21 00:50:00,120 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:50:00,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519574168] [2021-11-21 00:50:00,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519574168] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:50:00,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:50:00,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:50:00,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141163807] [2021-11-21 00:50:00,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:50:00,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:50:00,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:50:00,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:50:00,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:50:00,123 INFO L87 Difference]: Start difference. First operand 4926 states and 7017 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-21 00:50:02,200 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:50:06,680 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:50:09,192 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:50:11,786 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:50:11,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:50:11,828 INFO L93 Difference]: Finished difference Result 14508 states and 20686 transitions. [2021-11-21 00:50:11,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:50:11,829 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 174 [2021-11-21 00:50:11,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:50:11,915 INFO L225 Difference]: With dead ends: 14508 [2021-11-21 00:50:11,915 INFO L226 Difference]: Without dead ends: 9609 [2021-11-21 00:50:11,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:50:11,948 INFO L933 BasicCegarLoop]: 2281 mSDtfsCounter, 1960 mSDsluCounter, 1940 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 6 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1960 SdHoareTripleChecker+Valid, 3948 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:50:11,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1960 Valid, 3948 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 576 Invalid, 3 Unknown, 0 Unchecked, 11.3s Time] [2021-11-21 00:50:11,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9609 states. [2021-11-21 00:50:12,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9609 to 9574. [2021-11-21 00:50:12,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9574 states, 5482 states have (on average 1.2650492520977745) internal successors, (6935), 5751 states have internal predecessors, (6935), 3342 states have call successors, (3342), 758 states have call predecessors, (3342), 747 states have return successors, (3376), 3236 states have call predecessors, (3376), 3338 states have call successors, (3376) [2021-11-21 00:50:12,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9574 states to 9574 states and 13653 transitions. [2021-11-21 00:50:12,531 INFO L78 Accepts]: Start accepts. Automaton has 9574 states and 13653 transitions. Word has length 174 [2021-11-21 00:50:12,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:50:12,534 INFO L470 AbstractCegarLoop]: Abstraction has 9574 states and 13653 transitions. [2021-11-21 00:50:12,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-21 00:50:12,535 INFO L276 IsEmpty]: Start isEmpty. Operand 9574 states and 13653 transitions. [2021-11-21 00:50:12,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-21 00:50:12,541 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:50:12,541 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 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] [2021-11-21 00:50:12,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 00:50:12,542 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)] === [2021-11-21 00:50:12,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:50:12,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1529660918, now seen corresponding path program 1 times [2021-11-21 00:50:12,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:50:12,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931650522] [2021-11-21 00:50:12,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:50:12,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:50:12,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:50:13,131 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2021-11-21 00:50:13,132 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:50:13,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931650522] [2021-11-21 00:50:13,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931650522] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:50:13,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:50:13,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 00:50:13,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739972700] [2021-11-21 00:50:13,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:50:13,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:50:13,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:50:13,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:50:13,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:50:13,134 INFO L87 Difference]: Start difference. First operand 9574 states and 13653 transitions. Second operand has 6 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 3 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-21 00:50:15,205 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:50:26,744 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:50:32,952 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:50:33,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:50:33,001 INFO L93 Difference]: Finished difference Result 20533 states and 29063 transitions. [2021-11-21 00:50:33,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:50:33,008 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 3 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 183 [2021-11-21 00:50:33,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:50:33,101 INFO L225 Difference]: With dead ends: 20533 [2021-11-21 00:50:33,101 INFO L226 Difference]: Without dead ends: 10986 [2021-11-21 00:50:33,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:50:33,157 INFO L933 BasicCegarLoop]: 2920 mSDtfsCounter, 5234 mSDsluCounter, 4040 mSDsCounter, 0 mSdLazyCounter, 2577 mSolverCounterSat, 1911 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5336 SdHoareTripleChecker+Valid, 6262 SdHoareTripleChecker+Invalid, 4491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1911 IncrementalHoareTripleChecker+Valid, 2577 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:50:33,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5336 Valid, 6262 Invalid, 4491 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1911 Valid, 2577 Invalid, 3 Unknown, 0 Unchecked, 19.3s Time] [2021-11-21 00:50:33,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10986 states. [2021-11-21 00:50:33,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10986 to 10909. [2021-11-21 00:50:33,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10909 states, 6343 states have (on average 1.2629670502916601) internal successors, (8011), 6632 states have internal predecessors, (8011), 3623 states have call successors, (3623), 959 states have call predecessors, (3623), 940 states have return successors, (3638), 3491 states have call predecessors, (3638), 3619 states have call successors, (3638) [2021-11-21 00:50:33,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10909 states to 10909 states and 15272 transitions. [2021-11-21 00:50:33,795 INFO L78 Accepts]: Start accepts. Automaton has 10909 states and 15272 transitions. Word has length 183 [2021-11-21 00:50:33,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:50:33,796 INFO L470 AbstractCegarLoop]: Abstraction has 10909 states and 15272 transitions. [2021-11-21 00:50:33,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 3 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-21 00:50:33,796 INFO L276 IsEmpty]: Start isEmpty. Operand 10909 states and 15272 transitions. [2021-11-21 00:50:33,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-21 00:50:33,801 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:50:33,802 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:50:33,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 00:50:33,803 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 00:50:33,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:50:33,803 INFO L85 PathProgramCache]: Analyzing trace with hash 25734765, now seen corresponding path program 1 times [2021-11-21 00:50:33,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:50:33,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458060115] [2021-11-21 00:50:33,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:50:33,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:50:33,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:50:34,365 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 767 trivial. 0 not checked. [2021-11-21 00:50:34,365 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:50:34,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458060115] [2021-11-21 00:50:34,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458060115] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:50:34,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:50:34,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:50:34,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581213558] [2021-11-21 00:50:34,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:50:34,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:50:34,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:50:34,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:50:34,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:50:34,368 INFO L87 Difference]: Start difference. First operand 10909 states and 15272 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-21 00:50:36,445 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:50:41,892 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:50:47,494 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:50:47,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:50:47,590 INFO L93 Difference]: Finished difference Result 21389 states and 29961 transitions. [2021-11-21 00:50:47,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:50:47,591 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 193 [2021-11-21 00:50:47,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:50:47,718 INFO L225 Difference]: With dead ends: 21389 [2021-11-21 00:50:47,719 INFO L226 Difference]: Without dead ends: 21387 [2021-11-21 00:50:47,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:50:47,736 INFO L933 BasicCegarLoop]: 2343 mSDtfsCounter, 1891 mSDsluCounter, 7376 mSDsCounter, 0 mSdLazyCounter, 1389 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1903 SdHoareTripleChecker+Valid, 8712 SdHoareTripleChecker+Invalid, 1394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1389 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:50:47,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1903 Valid, 8712 Invalid, 1394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1389 Invalid, 3 Unknown, 0 Unchecked, 12.5s Time] [2021-11-21 00:50:47,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21387 states. [2021-11-21 00:50:48,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21387 to 21380. [2021-11-21 00:50:48,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21380 states, 12421 states have (on average 1.2643909508091136) internal successors, (15705), 12989 states have internal predecessors, (15705), 7110 states have call successors, (7110), 1884 states have call predecessors, (7110), 1846 states have return successors, (7140), 6848 states have call predecessors, (7140), 7102 states have call successors, (7140) [2021-11-21 00:50:48,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21380 states to 21380 states and 29955 transitions. [2021-11-21 00:50:48,900 INFO L78 Accepts]: Start accepts. Automaton has 21380 states and 29955 transitions. Word has length 193 [2021-11-21 00:50:48,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:50:48,901 INFO L470 AbstractCegarLoop]: Abstraction has 21380 states and 29955 transitions. [2021-11-21 00:50:48,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-21 00:50:48,902 INFO L276 IsEmpty]: Start isEmpty. Operand 21380 states and 29955 transitions. [2021-11-21 00:50:48,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-11-21 00:50:48,907 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:50:48,908 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:50:48,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 00:50:48,909 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 00:50:48,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:50:48,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1239307338, now seen corresponding path program 1 times [2021-11-21 00:50:48,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:50:48,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853039166] [2021-11-21 00:50:48,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:50:48,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:50:49,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:50:49,557 INFO L134 CoverageAnalysis]: Checked inductivity of 777 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2021-11-21 00:50:49,557 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:50:49,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853039166] [2021-11-21 00:50:49,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853039166] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:50:49,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:50:49,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:50:49,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585918582] [2021-11-21 00:50:49,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:50:49,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:50:49,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:50:49,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:50:49,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:50:49,560 INFO L87 Difference]: Start difference. First operand 21380 states and 29955 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (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) [2021-11-21 00:50:51,639 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:50:57,131 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:51:02,693 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:51:02,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:51:02,787 INFO L93 Difference]: Finished difference Result 21393 states and 29964 transitions. [2021-11-21 00:51:02,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:51:02,788 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (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 202 [2021-11-21 00:51:02,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:51:02,921 INFO L225 Difference]: With dead ends: 21393 [2021-11-21 00:51:02,921 INFO L226 Difference]: Without dead ends: 21391 [2021-11-21 00:51:02,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:51:02,940 INFO L933 BasicCegarLoop]: 2346 mSDtfsCounter, 1885 mSDsluCounter, 7376 mSDsCounter, 0 mSdLazyCounter, 1389 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1896 SdHoareTripleChecker+Valid, 8715 SdHoareTripleChecker+Invalid, 1394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1389 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:51:02,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1896 Valid, 8715 Invalid, 1394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1389 Invalid, 3 Unknown, 0 Unchecked, 12.5s Time] [2021-11-21 00:51:02,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21391 states. [2021-11-21 00:51:04,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21391 to 21384. [2021-11-21 00:51:04,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21384 states, 12424 states have (on average 1.2643271088216355) internal successors, (15708), 12992 states have internal predecessors, (15708), 7110 states have call successors, (7110), 1885 states have call predecessors, (7110), 1847 states have return successors, (7140), 6848 states have call predecessors, (7140), 7102 states have call successors, (7140) [2021-11-21 00:51:04,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21384 states to 21384 states and 29958 transitions. [2021-11-21 00:51:04,430 INFO L78 Accepts]: Start accepts. Automaton has 21384 states and 29958 transitions. Word has length 202 [2021-11-21 00:51:04,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:51:04,431 INFO L470 AbstractCegarLoop]: Abstraction has 21384 states and 29958 transitions. [2021-11-21 00:51:04,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (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) [2021-11-21 00:51:04,432 INFO L276 IsEmpty]: Start isEmpty. Operand 21384 states and 29958 transitions. [2021-11-21 00:51:04,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-11-21 00:51:04,438 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:51:04,438 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:51:04,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 00:51:04,438 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)] === [2021-11-21 00:51:04,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:51:04,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1732236781, now seen corresponding path program 1 times [2021-11-21 00:51:04,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:51:04,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379134042] [2021-11-21 00:51:04,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:51:04,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:51:04,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:51:04,903 INFO L134 CoverageAnalysis]: Checked inductivity of 775 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 771 trivial. 0 not checked. [2021-11-21 00:51:04,903 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:51:04,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379134042] [2021-11-21 00:51:04,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379134042] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:51:04,904 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:51:04,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:51:04,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268515806] [2021-11-21 00:51:04,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:51:04,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:51:04,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:51:04,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:51:04,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:51:04,906 INFO L87 Difference]: Start difference. First operand 21384 states and 29958 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 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) [2021-11-21 00:51:06,991 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:51:11,928 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:51:13,944 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:51:15,952 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:51:19,381 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:51:23,097 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:51:25,109 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:51:27,125 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:51:27,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:51:27,240 INFO L93 Difference]: Finished difference Result 31978 states and 44817 transitions. [2021-11-21 00:51:27,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:51:27,242 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 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 203 [2021-11-21 00:51:27,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:51:27,428 INFO L225 Difference]: With dead ends: 31978 [2021-11-21 00:51:27,428 INFO L226 Difference]: Without dead ends: 31976 [2021-11-21 00:51:27,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:51:27,448 INFO L933 BasicCegarLoop]: 2218 mSDtfsCounter, 1960 mSDsluCounter, 6975 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 2 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1970 SdHoareTripleChecker+Valid, 8331 SdHoareTripleChecker+Invalid, 1174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:51:27,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1970 Valid, 8331 Invalid, 1174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1165 Invalid, 7 Unknown, 0 Unchecked, 21.4s Time] [2021-11-21 00:51:27,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31976 states. [2021-11-21 00:51:28,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31976 to 31969. [2021-11-21 00:51:28,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31969 states, 18567 states have (on average 1.264770829967146) internal successors, (23483), 19420 states have internal predecessors, (23483), 10641 states have call successors, (10641), 2815 states have call predecessors, (10641), 2758 states have return successors, (10686), 10247 states have call predecessors, (10686), 10629 states have call successors, (10686) [2021-11-21 00:51:29,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31969 states to 31969 states and 44810 transitions. [2021-11-21 00:51:29,394 INFO L78 Accepts]: Start accepts. Automaton has 31969 states and 44810 transitions. Word has length 203 [2021-11-21 00:51:29,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:51:29,395 INFO L470 AbstractCegarLoop]: Abstraction has 31969 states and 44810 transitions. [2021-11-21 00:51:29,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 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) [2021-11-21 00:51:29,395 INFO L276 IsEmpty]: Start isEmpty. Operand 31969 states and 44810 transitions. [2021-11-21 00:51:29,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-11-21 00:51:29,411 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:51:29,412 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 5, 5, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:51:29,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 00:51:29,413 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)] === [2021-11-21 00:51:29,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:51:29,414 INFO L85 PathProgramCache]: Analyzing trace with hash -301046001, now seen corresponding path program 1 times [2021-11-21 00:51:29,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:51:29,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145593677] [2021-11-21 00:51:29,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:51:29,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:51:29,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:51:29,905 INFO L134 CoverageAnalysis]: Checked inductivity of 792 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2021-11-21 00:51:29,905 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:51:29,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145593677] [2021-11-21 00:51:29,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145593677] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:51:29,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:51:29,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:51:29,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45285973] [2021-11-21 00:51:29,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:51:29,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:51:29,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:51:29,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:51:29,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:51:29,907 INFO L87 Difference]: Start difference. First operand 31969 states and 44810 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-21 00:51:31,982 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:51:37,313 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:51:43,129 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:51:43,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:51:43,475 INFO L93 Difference]: Finished difference Result 31982 states and 44819 transitions. [2021-11-21 00:51:43,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:51:43,476 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 211 [2021-11-21 00:51:43,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:51:43,638 INFO L225 Difference]: With dead ends: 31982 [2021-11-21 00:51:43,639 INFO L226 Difference]: Without dead ends: 31980 [2021-11-21 00:51:43,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:51:43,654 INFO L933 BasicCegarLoop]: 2346 mSDtfsCounter, 1885 mSDsluCounter, 7376 mSDsCounter, 0 mSdLazyCounter, 1389 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1894 SdHoareTripleChecker+Valid, 8715 SdHoareTripleChecker+Invalid, 1394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1389 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:51:43,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1894 Valid, 8715 Invalid, 1394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1389 Invalid, 3 Unknown, 0 Unchecked, 12.6s Time] [2021-11-21 00:51:43,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31980 states. [2021-11-21 00:51:45,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31980 to 31973. [2021-11-21 00:51:45,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31973 states, 18570 states have (on average 1.264728056004308) internal successors, (23486), 19423 states have internal predecessors, (23486), 10641 states have call successors, (10641), 2816 states have call predecessors, (10641), 2759 states have return successors, (10686), 10247 states have call predecessors, (10686), 10629 states have call successors, (10686) [2021-11-21 00:51:45,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31973 states to 31973 states and 44813 transitions. [2021-11-21 00:51:45,333 INFO L78 Accepts]: Start accepts. Automaton has 31973 states and 44813 transitions. Word has length 211 [2021-11-21 00:51:45,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:51:45,336 INFO L470 AbstractCegarLoop]: Abstraction has 31973 states and 44813 transitions. [2021-11-21 00:51:45,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-21 00:51:45,336 INFO L276 IsEmpty]: Start isEmpty. Operand 31973 states and 44813 transitions. [2021-11-21 00:51:45,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-11-21 00:51:45,346 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:51:45,346 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:51:45,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 00:51:45,346 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 00:51:45,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:51:45,347 INFO L85 PathProgramCache]: Analyzing trace with hash -801328874, now seen corresponding path program 1 times [2021-11-21 00:51:45,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:51:45,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537966540] [2021-11-21 00:51:45,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:51:45,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:51:45,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:51:45,804 INFO L134 CoverageAnalysis]: Checked inductivity of 807 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 799 trivial. 0 not checked. [2021-11-21 00:51:45,805 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:51:45,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537966540] [2021-11-21 00:51:45,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537966540] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:51:45,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:51:45,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:51:45,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520928348] [2021-11-21 00:51:45,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:51:45,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:51:45,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:51:45,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:51:45,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:51:45,807 INFO L87 Difference]: Start difference. First operand 31973 states and 44813 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (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) [2021-11-21 00:51:47,880 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:51:53,640 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:51:59,402 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:51:59,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:51:59,709 INFO L93 Difference]: Finished difference Result 31986 states and 44822 transitions. [2021-11-21 00:51:59,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:51:59,710 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (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 217 [2021-11-21 00:51:59,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:51:59,860 INFO L225 Difference]: With dead ends: 31986 [2021-11-21 00:51:59,860 INFO L226 Difference]: Without dead ends: 31984 [2021-11-21 00:51:59,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:51:59,875 INFO L933 BasicCegarLoop]: 2346 mSDtfsCounter, 1885 mSDsluCounter, 7376 mSDsCounter, 0 mSdLazyCounter, 1389 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1893 SdHoareTripleChecker+Valid, 8715 SdHoareTripleChecker+Invalid, 1394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1389 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:51:59,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1893 Valid, 8715 Invalid, 1394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1389 Invalid, 3 Unknown, 0 Unchecked, 12.5s Time] [2021-11-21 00:51:59,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31984 states. [2021-11-21 00:52:01,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31984 to 31977. [2021-11-21 00:52:01,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31977 states, 18573 states have (on average 1.2646852958595811) internal successors, (23489), 19426 states have internal predecessors, (23489), 10641 states have call successors, (10641), 2817 states have call predecessors, (10641), 2760 states have return successors, (10686), 10247 states have call predecessors, (10686), 10629 states have call successors, (10686) [2021-11-21 00:52:01,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31977 states to 31977 states and 44816 transitions. [2021-11-21 00:52:01,515 INFO L78 Accepts]: Start accepts. Automaton has 31977 states and 44816 transitions. Word has length 217 [2021-11-21 00:52:01,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:52:01,516 INFO L470 AbstractCegarLoop]: Abstraction has 31977 states and 44816 transitions. [2021-11-21 00:52:01,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (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) [2021-11-21 00:52:01,517 INFO L276 IsEmpty]: Start isEmpty. Operand 31977 states and 44816 transitions. [2021-11-21 00:52:01,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-11-21 00:52:01,523 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:52:01,523 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 6, 5, 5, 4, 4, 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] [2021-11-21 00:52:01,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-21 00:52:01,524 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 00:52:01,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:52:01,525 INFO L85 PathProgramCache]: Analyzing trace with hash -837511981, now seen corresponding path program 1 times [2021-11-21 00:52:01,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:52:01,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338529458] [2021-11-21 00:52:01,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:52:01,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:52:01,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:52:01,949 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 807 trivial. 0 not checked. [2021-11-21 00:52:01,949 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:52:01,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338529458] [2021-11-21 00:52:01,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338529458] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:52:01,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:52:01,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:52:01,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636042627] [2021-11-21 00:52:01,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:52:01,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:52:01,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:52:01,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:52:01,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:52:01,952 INFO L87 Difference]: Start difference. First operand 31977 states and 44816 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-21 00:52:04,029 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:52:09,548 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:52:15,437 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:52:15,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:52:15,785 INFO L93 Difference]: Finished difference Result 31990 states and 44825 transitions. [2021-11-21 00:52:15,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:52:15,785 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 218 [2021-11-21 00:52:15,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:52:15,942 INFO L225 Difference]: With dead ends: 31990 [2021-11-21 00:52:15,943 INFO L226 Difference]: Without dead ends: 31988 [2021-11-21 00:52:15,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:52:15,959 INFO L933 BasicCegarLoop]: 2346 mSDtfsCounter, 1886 mSDsluCounter, 7376 mSDsCounter, 0 mSdLazyCounter, 1389 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1893 SdHoareTripleChecker+Valid, 8715 SdHoareTripleChecker+Invalid, 1394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1389 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time [2021-11-21 00:52:15,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1893 Valid, 8715 Invalid, 1394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1389 Invalid, 3 Unknown, 0 Unchecked, 12.9s Time] [2021-11-21 00:52:15,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31988 states. [2021-11-21 00:52:17,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31988 to 31981. [2021-11-21 00:52:17,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31981 states, 18576 states have (on average 1.2646425495262705) internal successors, (23492), 19429 states have internal predecessors, (23492), 10641 states have call successors, (10641), 2818 states have call predecessors, (10641), 2761 states have return successors, (10686), 10247 states have call predecessors, (10686), 10629 states have call successors, (10686) [2021-11-21 00:52:17,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31981 states to 31981 states and 44819 transitions. [2021-11-21 00:52:17,754 INFO L78 Accepts]: Start accepts. Automaton has 31981 states and 44819 transitions. Word has length 218 [2021-11-21 00:52:17,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:52:17,755 INFO L470 AbstractCegarLoop]: Abstraction has 31981 states and 44819 transitions. [2021-11-21 00:52:17,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-21 00:52:17,756 INFO L276 IsEmpty]: Start isEmpty. Operand 31981 states and 44819 transitions. [2021-11-21 00:52:17,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-11-21 00:52:17,764 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:52:17,765 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 7, 6, 6, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:52:17,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-21 00:52:17,766 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 00:52:17,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:52:17,766 INFO L85 PathProgramCache]: Analyzing trace with hash 775723825, now seen corresponding path program 1 times [2021-11-21 00:52:17,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:52:17,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048941511] [2021-11-21 00:52:17,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:52:17,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:52:18,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:52:18,493 INFO L134 CoverageAnalysis]: Checked inductivity of 846 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 834 trivial. 0 not checked. [2021-11-21 00:52:18,493 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:52:18,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048941511] [2021-11-21 00:52:18,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048941511] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:52:18,494 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:52:18,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:52:18,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230082669] [2021-11-21 00:52:18,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:52:18,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:52:18,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:52:18,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:52:18,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:52:18,496 INFO L87 Difference]: Start difference. First operand 31981 states and 44819 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-21 00:52:20,585 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:52:26,377 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:52:32,271 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:52:32,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:52:32,766 INFO L93 Difference]: Finished difference Result 50493 states and 70558 transitions. [2021-11-21 00:52:32,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:52:32,767 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (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 226 [2021-11-21 00:52:32,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:52:33,001 INFO L225 Difference]: With dead ends: 50493 [2021-11-21 00:52:33,001 INFO L226 Difference]: Without dead ends: 50491 [2021-11-21 00:52:33,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:52:33,028 INFO L933 BasicCegarLoop]: 2297 mSDtfsCounter, 1806 mSDsluCounter, 7138 mSDsCounter, 0 mSdLazyCounter, 1354 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1812 SdHoareTripleChecker+Valid, 8458 SdHoareTripleChecker+Invalid, 1360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1354 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:52:33,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1812 Valid, 8458 Invalid, 1360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1354 Invalid, 3 Unknown, 0 Unchecked, 12.7s Time] [2021-11-21 00:52:33,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50491 states. [2021-11-21 00:52:34,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50491 to 50462. [2021-11-21 00:52:35,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50462 states, 29395 states have (on average 1.265759482905256) internal successors, (37207), 30776 states have internal predecessors, (37207), 16565 states have call successors, (16565), 4664 states have call predecessors, (16565), 4499 states have return successors, (16756), 15765 states have call predecessors, (16756), 16545 states have call successors, (16756) [2021-11-21 00:52:35,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50462 states to 50462 states and 70528 transitions. [2021-11-21 00:52:35,467 INFO L78 Accepts]: Start accepts. Automaton has 50462 states and 70528 transitions. Word has length 226 [2021-11-21 00:52:35,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:52:35,468 INFO L470 AbstractCegarLoop]: Abstraction has 50462 states and 70528 transitions. [2021-11-21 00:52:35,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-21 00:52:35,469 INFO L276 IsEmpty]: Start isEmpty. Operand 50462 states and 70528 transitions. [2021-11-21 00:52:35,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-11-21 00:52:35,479 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:52:35,479 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 8, 7, 7, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:52:35,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-21 00:52:35,480 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 00:52:35,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:52:35,481 INFO L85 PathProgramCache]: Analyzing trace with hash -78810865, now seen corresponding path program 1 times [2021-11-21 00:52:35,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:52:35,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739014227] [2021-11-21 00:52:35,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:52:35,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:52:35,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:52:36,184 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2021-11-21 00:52:36,185 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:52:36,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739014227] [2021-11-21 00:52:36,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739014227] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:52:36,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:52:36,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:52:36,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083398803] [2021-11-21 00:52:36,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:52:36,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:52:36,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:52:36,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:52:36,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:52:36,187 INFO L87 Difference]: Start difference. First operand 50462 states and 70528 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-21 00:52:38,281 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:52:43,703 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:52:49,801 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:52:50,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:52:50,271 INFO L93 Difference]: Finished difference Result 50475 states and 70537 transitions. [2021-11-21 00:52:50,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:52:50,271 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 231 [2021-11-21 00:52:50,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:52:50,451 INFO L225 Difference]: With dead ends: 50475 [2021-11-21 00:52:50,451 INFO L226 Difference]: Without dead ends: 50473 [2021-11-21 00:52:50,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:52:50,472 INFO L933 BasicCegarLoop]: 2346 mSDtfsCounter, 1885 mSDsluCounter, 7376 mSDsCounter, 0 mSdLazyCounter, 1389 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1890 SdHoareTripleChecker+Valid, 8715 SdHoareTripleChecker+Invalid, 1394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1389 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:52:50,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1890 Valid, 8715 Invalid, 1394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1389 Invalid, 3 Unknown, 0 Unchecked, 12.7s Time] [2021-11-21 00:52:50,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50473 states. [2021-11-21 00:52:52,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50473 to 50466. [2021-11-21 00:52:52,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50466 states, 29398 states have (on average 1.265732362745765) internal successors, (37210), 30779 states have internal predecessors, (37210), 16565 states have call successors, (16565), 4665 states have call predecessors, (16565), 4500 states have return successors, (16756), 15765 states have call predecessors, (16756), 16545 states have call successors, (16756) [2021-11-21 00:52:53,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50466 states to 50466 states and 70531 transitions. [2021-11-21 00:52:53,053 INFO L78 Accepts]: Start accepts. Automaton has 50466 states and 70531 transitions. Word has length 231 [2021-11-21 00:52:53,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:52:53,054 INFO L470 AbstractCegarLoop]: Abstraction has 50466 states and 70531 transitions. [2021-11-21 00:52:53,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-21 00:52:53,055 INFO L276 IsEmpty]: Start isEmpty. Operand 50466 states and 70531 transitions. [2021-11-21 00:52:53,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-11-21 00:52:53,064 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:52:53,064 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 9, 8, 8, 4, 4, 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] [2021-11-21 00:52:53,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-21 00:52:53,065 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)] === [2021-11-21 00:52:53,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:52:53,065 INFO L85 PathProgramCache]: Analyzing trace with hash -361026451, now seen corresponding path program 1 times [2021-11-21 00:52:53,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:52:53,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999282718] [2021-11-21 00:52:53,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:52:53,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:52:53,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:52:53,511 INFO L134 CoverageAnalysis]: Checked inductivity of 895 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 879 trivial. 0 not checked. [2021-11-21 00:52:53,511 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:52:53,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999282718] [2021-11-21 00:52:53,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999282718] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:52:53,511 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:52:53,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:52:53,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262086057] [2021-11-21 00:52:53,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:52:53,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:52:53,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:52:53,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:52:53,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:52:53,513 INFO L87 Difference]: Start difference. First operand 50466 states and 70531 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-21 00:52:55,593 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:53:01,363 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:53:07,261 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:53:07,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:53:07,764 INFO L93 Difference]: Finished difference Result 50479 states and 70540 transitions. [2021-11-21 00:53:07,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:53:07,764 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 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 233 [2021-11-21 00:53:07,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:53:07,941 INFO L225 Difference]: With dead ends: 50479 [2021-11-21 00:53:07,941 INFO L226 Difference]: Without dead ends: 50477 [2021-11-21 00:53:07,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:53:07,964 INFO L933 BasicCegarLoop]: 2346 mSDtfsCounter, 1886 mSDsluCounter, 7376 mSDsCounter, 0 mSdLazyCounter, 1389 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1890 SdHoareTripleChecker+Valid, 8715 SdHoareTripleChecker+Invalid, 1394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1389 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:53:07,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1890 Valid, 8715 Invalid, 1394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1389 Invalid, 3 Unknown, 0 Unchecked, 12.7s Time] [2021-11-21 00:53:08,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50477 states. [2021-11-21 00:53:10,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50477 to 50470. [2021-11-21 00:53:10,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50470 states, 29401 states have (on average 1.2657052481208122) internal successors, (37213), 30782 states have internal predecessors, (37213), 16565 states have call successors, (16565), 4666 states have call predecessors, (16565), 4501 states have return successors, (16756), 15765 states have call predecessors, (16756), 16545 states have call successors, (16756) [2021-11-21 00:53:10,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50470 states to 50470 states and 70534 transitions. [2021-11-21 00:53:10,631 INFO L78 Accepts]: Start accepts. Automaton has 50470 states and 70534 transitions. Word has length 233 [2021-11-21 00:53:10,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:53:10,632 INFO L470 AbstractCegarLoop]: Abstraction has 50470 states and 70534 transitions. [2021-11-21 00:53:10,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-21 00:53:10,633 INFO L276 IsEmpty]: Start isEmpty. Operand 50470 states and 70534 transitions. [2021-11-21 00:53:10,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-11-21 00:53:10,643 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:53:10,643 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 10, 9, 9, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:53:10,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-21 00:53:10,644 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 00:53:10,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:53:10,644 INFO L85 PathProgramCache]: Analyzing trace with hash -54452721, now seen corresponding path program 1 times [2021-11-21 00:53:10,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:53:10,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609128497] [2021-11-21 00:53:10,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:53:10,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:53:10,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:53:11,095 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 918 trivial. 0 not checked. [2021-11-21 00:53:11,096 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:53:11,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609128497] [2021-11-21 00:53:11,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609128497] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:53:11,096 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:53:11,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:53:11,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851201407] [2021-11-21 00:53:11,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:53:11,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:53:11,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:53:11,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:53:11,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:53:11,098 INFO L87 Difference]: Start difference. First operand 50470 states and 70534 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-21 00:53:13,151 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:53:18,938 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:53:25,089 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:53:25,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:53:25,671 INFO L93 Difference]: Finished difference Result 50483 states and 70543 transitions. [2021-11-21 00:53:25,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:53:25,671 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 241 [2021-11-21 00:53:25,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:53:25,862 INFO L225 Difference]: With dead ends: 50483 [2021-11-21 00:53:25,862 INFO L226 Difference]: Without dead ends: 50481 [2021-11-21 00:53:25,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:53:25,884 INFO L933 BasicCegarLoop]: 2346 mSDtfsCounter, 1885 mSDsluCounter, 7376 mSDsCounter, 0 mSdLazyCounter, 1389 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1888 SdHoareTripleChecker+Valid, 8715 SdHoareTripleChecker+Invalid, 1394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1389 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2021-11-21 00:53:25,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1888 Valid, 8715 Invalid, 1394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1389 Invalid, 3 Unknown, 0 Unchecked, 12.8s Time] [2021-11-21 00:53:25,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50481 states. [2021-11-21 00:53:27,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50481 to 50474. [2021-11-21 00:53:27,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50474 states, 29404 states have (on average 1.2656781390287035) internal successors, (37216), 30785 states have internal predecessors, (37216), 16565 states have call successors, (16565), 4667 states have call predecessors, (16565), 4502 states have return successors, (16756), 15765 states have call predecessors, (16756), 16545 states have call successors, (16756) [2021-11-21 00:53:28,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50474 states to 50474 states and 70537 transitions. [2021-11-21 00:53:28,189 INFO L78 Accepts]: Start accepts. Automaton has 50474 states and 70537 transitions. Word has length 241 [2021-11-21 00:53:28,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:53:28,189 INFO L470 AbstractCegarLoop]: Abstraction has 50474 states and 70537 transitions. [2021-11-21 00:53:28,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-21 00:53:28,190 INFO L276 IsEmpty]: Start isEmpty. Operand 50474 states and 70537 transitions. [2021-11-21 00:53:28,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-11-21 00:53:28,199 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:53:28,200 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 11, 10, 10, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:53:28,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-21 00:53:28,200 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 00:53:28,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:53:28,201 INFO L85 PathProgramCache]: Analyzing trace with hash -260747215, now seen corresponding path program 1 times [2021-11-21 00:53:28,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:53:28,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826678201] [2021-11-21 00:53:28,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:53:28,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:53:28,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:53:28,637 INFO L134 CoverageAnalysis]: Checked inductivity of 974 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 954 trivial. 0 not checked. [2021-11-21 00:53:28,637 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:53:28,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826678201] [2021-11-21 00:53:28,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826678201] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:53:28,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:53:28,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:53:28,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110311184] [2021-11-21 00:53:28,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:53:28,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:53:28,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:53:28,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:53:28,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:53:28,640 INFO L87 Difference]: Start difference. First operand 50474 states and 70537 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (36), 3 states have call predecessors, (36), 1 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-21 00:53:30,932 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.29s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:53:36,656 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:53:42,817 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:53:43,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:53:43,324 INFO L93 Difference]: Finished difference Result 50487 states and 70546 transitions. [2021-11-21 00:53:43,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:53:43,325 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (36), 3 states have call predecessors, (36), 1 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) Word has length 246 [2021-11-21 00:53:43,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:53:43,552 INFO L225 Difference]: With dead ends: 50487 [2021-11-21 00:53:43,552 INFO L226 Difference]: Without dead ends: 50485 [2021-11-21 00:53:43,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:53:43,572 INFO L933 BasicCegarLoop]: 2346 mSDtfsCounter, 1885 mSDsluCounter, 7376 mSDsCounter, 0 mSdLazyCounter, 1389 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1887 SdHoareTripleChecker+Valid, 8715 SdHoareTripleChecker+Invalid, 1394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1389 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:53:43,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1887 Valid, 8715 Invalid, 1394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1389 Invalid, 3 Unknown, 0 Unchecked, 13.0s Time] [2021-11-21 00:53:43,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50485 states. [2021-11-21 00:53:45,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50485 to 50478. [2021-11-21 00:53:45,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50478 states, 29407 states have (on average 1.2656510354677457) internal successors, (37219), 30788 states have internal predecessors, (37219), 16565 states have call successors, (16565), 4668 states have call predecessors, (16565), 4503 states have return successors, (16756), 15765 states have call predecessors, (16756), 16545 states have call successors, (16756) [2021-11-21 00:53:45,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50478 states to 50478 states and 70540 transitions. [2021-11-21 00:53:45,986 INFO L78 Accepts]: Start accepts. Automaton has 50478 states and 70540 transitions. Word has length 246 [2021-11-21 00:53:45,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:53:45,987 INFO L470 AbstractCegarLoop]: Abstraction has 50478 states and 70540 transitions. [2021-11-21 00:53:45,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (36), 3 states have call predecessors, (36), 1 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-21 00:53:45,987 INFO L276 IsEmpty]: Start isEmpty. Operand 50478 states and 70540 transitions. [2021-11-21 00:53:45,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-11-21 00:53:45,996 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:53:45,997 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 12, 11, 11, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:53:45,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-21 00:53:45,997 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 00:53:45,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:53:45,998 INFO L85 PathProgramCache]: Analyzing trace with hash -216080246, now seen corresponding path program 1 times [2021-11-21 00:53:45,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:53:45,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541352291] [2021-11-21 00:53:45,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:53:45,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:53:46,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:53:46,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1017 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 995 trivial. 0 not checked. [2021-11-21 00:53:46,488 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:53:46,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541352291] [2021-11-21 00:53:46,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541352291] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:53:46,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:53:46,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:53:46,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661347859] [2021-11-21 00:53:46,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:53:46,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:53:46,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:53:46,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:53:46,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:53:46,490 INFO L87 Difference]: Start difference. First operand 50478 states and 70540 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-21 00:53:48,564 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:53:54,511 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:54:00,827 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:54:02,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:54:02,152 INFO L93 Difference]: Finished difference Result 87844 states and 123030 transitions. [2021-11-21 00:54:02,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:54:02,154 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 252 [2021-11-21 00:54:02,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:54:02,560 INFO L225 Difference]: With dead ends: 87844 [2021-11-21 00:54:02,561 INFO L226 Difference]: Without dead ends: 87840 [2021-11-21 00:54:02,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:54:02,597 INFO L933 BasicCegarLoop]: 2329 mSDtfsCounter, 1830 mSDsluCounter, 7330 mSDsCounter, 0 mSdLazyCounter, 1383 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1831 SdHoareTripleChecker+Valid, 8658 SdHoareTripleChecker+Invalid, 1389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1383 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:54:02,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1831 Valid, 8658 Invalid, 1389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1383 Invalid, 3 Unknown, 0 Unchecked, 12.7s Time] [2021-11-21 00:54:02,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87840 states. [2021-11-21 00:54:06,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87840 to 87802. [2021-11-21 00:54:06,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87802 states, 51289 states have (on average 1.2707988067616838) internal successors, (65178), 53789 states have internal predecessors, (65178), 28665 states have call successors, (28665), 8189 states have call predecessors, (28665), 7845 states have return successors, (29144), 27123 states have call predecessors, (29144), 28629 states have call successors, (29144) [2021-11-21 00:54:07,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87802 states to 87802 states and 122987 transitions. [2021-11-21 00:54:07,279 INFO L78 Accepts]: Start accepts. Automaton has 87802 states and 122987 transitions. Word has length 252 [2021-11-21 00:54:07,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:54:07,280 INFO L470 AbstractCegarLoop]: Abstraction has 87802 states and 122987 transitions. [2021-11-21 00:54:07,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-21 00:54:07,280 INFO L276 IsEmpty]: Start isEmpty. Operand 87802 states and 122987 transitions. [2021-11-21 00:54:07,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-11-21 00:54:07,290 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:54:07,291 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 13, 12, 12, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:54:07,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-21 00:54:07,291 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 00:54:07,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:54:07,292 INFO L85 PathProgramCache]: Analyzing trace with hash 518554289, now seen corresponding path program 1 times [2021-11-21 00:54:07,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:54:07,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934900255] [2021-11-21 00:54:07,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:54:07,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:54:07,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:54:07,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1062 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 1038 trivial. 0 not checked. [2021-11-21 00:54:07,793 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:54:07,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934900255] [2021-11-21 00:54:07,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934900255] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:54:07,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:54:07,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:54:07,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807673221] [2021-11-21 00:54:07,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:54:07,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:54:07,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:54:07,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:54:07,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:54:07,796 INFO L87 Difference]: Start difference. First operand 87802 states and 122987 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-21 00:54:09,882 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:54:15,963 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:54:22,589 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:54:23,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:54:23,912 INFO L93 Difference]: Finished difference Result 87809 states and 122991 transitions. [2021-11-21 00:54:23,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:54:23,914 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 256 [2021-11-21 00:54:23,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:54:24,263 INFO L225 Difference]: With dead ends: 87809 [2021-11-21 00:54:24,263 INFO L226 Difference]: Without dead ends: 87649 [2021-11-21 00:54:24,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:54:24,500 INFO L933 BasicCegarLoop]: 2346 mSDtfsCounter, 1881 mSDsluCounter, 7378 mSDsCounter, 0 mSdLazyCounter, 1385 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1881 SdHoareTripleChecker+Valid, 8717 SdHoareTripleChecker+Invalid, 1390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1385 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:54:24,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1881 Valid, 8717 Invalid, 1390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1385 Invalid, 3 Unknown, 0 Unchecked, 13.3s Time] [2021-11-21 00:54:24,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87649 states. [2021-11-21 00:54:28,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87649 to 87644. [2021-11-21 00:54:28,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87644 states, 51235 states have (on average 1.2703815750951497) internal successors, (65088), 53700 states have internal predecessors, (65088), 28577 states have call successors, (28577), 8163 states have call predecessors, (28577), 7829 states have return successors, (29060), 27080 states have call predecessors, (29060), 28545 states have call successors, (29060) [2021-11-21 00:54:28,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87644 states to 87644 states and 122725 transitions. [2021-11-21 00:54:28,908 INFO L78 Accepts]: Start accepts. Automaton has 87644 states and 122725 transitions. Word has length 256 [2021-11-21 00:54:28,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:54:28,909 INFO L470 AbstractCegarLoop]: Abstraction has 87644 states and 122725 transitions. [2021-11-21 00:54:28,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-21 00:54:28,910 INFO L276 IsEmpty]: Start isEmpty. Operand 87644 states and 122725 transitions. [2021-11-21 00:54:28,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-11-21 00:54:28,919 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:54:28,919 INFO L514 BasicCegarLoop]: trace histogram [19, 13, 13, 13, 13, 13, 13, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:54:28,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-21 00:54:28,920 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 00:54:28,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:54:28,920 INFO L85 PathProgramCache]: Analyzing trace with hash -315234821, now seen corresponding path program 1 times [2021-11-21 00:54:28,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:54:28,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411237604] [2021-11-21 00:54:28,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:54:28,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:54:29,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:54:29,700 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 830 trivial. 0 not checked. [2021-11-21 00:54:29,701 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:54:29,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411237604] [2021-11-21 00:54:29,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411237604] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:54:29,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:54:29,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:54:29,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362873245] [2021-11-21 00:54:29,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:54:29,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:54:29,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:54:29,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:54:29,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:54:29,704 INFO L87 Difference]: Start difference. First operand 87644 states and 122725 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (31), 3 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-21 00:54:31,781 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:54:37,313 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []