./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_fs-nfs-nfs_layout_nfsv41_files.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_b2a3286e-4772-46d9-a559-4e4c698992ff/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a3286e-4772-46d9-a559-4e4c698992ff/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_b2a3286e-4772-46d9-a559-4e4c698992ff/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a3286e-4772-46d9-a559-4e4c698992ff/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_fs-nfs-nfs_layout_nfsv41_files.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a3286e-4772-46d9-a559-4e4c698992ff/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_b2a3286e-4772-46d9-a559-4e4c698992ff/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 d291badf6e321259e0b1b1625d2ed48867e61016cda7885a720272c3e12df877 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:13:01,097 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:13:01,100 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:13:01,129 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:13:01,129 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:13:01,131 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:13:01,133 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:13:01,135 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:13:01,137 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:13:01,138 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:13:01,139 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:13:01,141 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:13:01,141 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:13:01,142 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:13:01,144 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:13:01,146 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:13:01,147 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:13:01,148 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:13:01,150 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:13:01,153 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:13:01,155 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:13:01,156 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:13:01,158 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:13:01,159 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:13:01,162 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:13:01,163 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:13:01,163 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:13:01,164 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:13:01,165 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:13:01,166 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:13:01,167 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:13:01,168 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:13:01,169 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:13:01,170 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:13:01,171 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:13:01,171 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:13:01,172 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:13:01,173 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:13:01,173 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:13:01,174 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:13:01,175 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:13:01,176 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a3286e-4772-46d9-a559-4e4c698992ff/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-20 23:13:01,200 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:13:01,201 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:13:01,201 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:13:01,201 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:13:01,202 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:13:01,202 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:13:01,202 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:13:01,203 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:13:01,203 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:13:01,203 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:13:01,204 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:13:01,204 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:13:01,204 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:13:01,204 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:13:01,205 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:13:01,205 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:13:01,205 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:13:01,206 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:13:01,206 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:13:01,207 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:13:01,207 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:13:01,207 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:13:01,207 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:13:01,208 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:13:01,208 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:13:01,208 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:13:01,208 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:13:01,209 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:13:01,213 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:13:01,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:13:01,214 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:13:01,214 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:13:01,214 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:13:01,214 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:13:01,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:13:01,215 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:13:01,215 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:13:01,215 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:13:01,216 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_b2a3286e-4772-46d9-a559-4e4c698992ff/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a3286e-4772-46d9-a559-4e4c698992ff/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d291badf6e321259e0b1b1625d2ed48867e61016cda7885a720272c3e12df877 [2021-11-20 23:13:01,451 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:13:01,470 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:13:01,473 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:13:01,474 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:13:01,475 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:13:01,476 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a3286e-4772-46d9-a559-4e4c698992ff/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_fs-nfs-nfs_layout_nfsv41_files.cil.i [2021-11-20 23:13:01,569 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a3286e-4772-46d9-a559-4e4c698992ff/bin/utaipan-TEXQjIfE4P/data/353b870c0/205f0a268f5f46d492bfaf13f17db84e/FLAGf66105be5 [2021-11-20 23:13:02,566 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:13:02,567 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a3286e-4772-46d9-a559-4e4c698992ff/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_fs-nfs-nfs_layout_nfsv41_files.cil.i [2021-11-20 23:13:02,675 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a3286e-4772-46d9-a559-4e4c698992ff/bin/utaipan-TEXQjIfE4P/data/353b870c0/205f0a268f5f46d492bfaf13f17db84e/FLAGf66105be5 [2021-11-20 23:13:02,894 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a3286e-4772-46d9-a559-4e4c698992ff/bin/utaipan-TEXQjIfE4P/data/353b870c0/205f0a268f5f46d492bfaf13f17db84e [2021-11-20 23:13:02,898 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:13:02,899 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:13:02,901 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:13:02,901 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:13:02,904 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:13:02,904 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:13:02" (1/1) ... [2021-11-20 23:13:02,906 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41a35ceb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:02, skipping insertion in model container [2021-11-20 23:13:02,906 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:13:02" (1/1) ... [2021-11-20 23:13:02,913 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:13:03,086 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:13:07,082 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_b2a3286e-4772-46d9-a559-4e4c698992ff/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_fs-nfs-nfs_layout_nfsv41_files.cil.i[462737,462750] [2021-11-20 23:13:07,086 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_b2a3286e-4772-46d9-a559-4e4c698992ff/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_fs-nfs-nfs_layout_nfsv41_files.cil.i[462906,462919] [2021-11-20 23:13:07,088 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_b2a3286e-4772-46d9-a559-4e4c698992ff/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_fs-nfs-nfs_layout_nfsv41_files.cil.i[463073,463086] [2021-11-20 23:13:07,089 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_b2a3286e-4772-46d9-a559-4e4c698992ff/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_fs-nfs-nfs_layout_nfsv41_files.cil.i[463241,463254] [2021-11-20 23:13:07,125 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:13:07,163 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:13:07,838 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_b2a3286e-4772-46d9-a559-4e4c698992ff/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_fs-nfs-nfs_layout_nfsv41_files.cil.i[462737,462750] [2021-11-20 23:13:07,839 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_b2a3286e-4772-46d9-a559-4e4c698992ff/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_fs-nfs-nfs_layout_nfsv41_files.cil.i[462906,462919] [2021-11-20 23:13:07,839 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_b2a3286e-4772-46d9-a559-4e4c698992ff/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_fs-nfs-nfs_layout_nfsv41_files.cil.i[463073,463086] [2021-11-20 23:13:07,840 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_b2a3286e-4772-46d9-a559-4e4c698992ff/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_fs-nfs-nfs_layout_nfsv41_files.cil.i[463241,463254] [2021-11-20 23:13:07,847 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:13:08,054 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:13:08,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:08 WrapperNode [2021-11-20 23:13:08,055 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:13:08,056 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:13:08,056 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:13:08,056 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:13:08,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:08" (1/1) ... [2021-11-20 23:13:08,198 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:08" (1/1) ... [2021-11-20 23:13:08,404 INFO L137 Inliner]: procedures = 522, calls = 2018, calls flagged for inlining = 218, calls inlined = 177, statements flattened = 5279 [2021-11-20 23:13:08,405 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:13:08,406 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:13:08,406 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:13:08,407 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:13:08,416 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:08" (1/1) ... [2021-11-20 23:13:08,416 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:08" (1/1) ... [2021-11-20 23:13:08,440 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:08" (1/1) ... [2021-11-20 23:13:08,440 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:08" (1/1) ... [2021-11-20 23:13:08,556 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:08" (1/1) ... [2021-11-20 23:13:08,578 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:08" (1/1) ... [2021-11-20 23:13:08,611 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:08" (1/1) ... [2021-11-20 23:13:08,637 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:13:08,638 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:13:08,639 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:13:08,639 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:13:08,640 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:08" (1/1) ... [2021-11-20 23:13:08,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:13:08,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a3286e-4772-46d9-a559-4e4c698992ff/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:13:08,670 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a3286e-4772-46d9-a559-4e4c698992ff/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:13:08,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2a3286e-4772-46d9-a559-4e4c698992ff/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:13:08,731 INFO L130 BoogieDeclarations]: Found specification of procedure filelayout_get_ds_info [2021-11-20 23:13:08,731 INFO L138 BoogieDeclarations]: Found implementation of procedure filelayout_get_ds_info [2021-11-20 23:13:08,731 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2021-11-20 23:13:08,731 INFO L130 BoogieDeclarations]: Found specification of procedure filelayout_commit_prepare [2021-11-20 23:13:08,731 INFO L138 BoogieDeclarations]: Found implementation of procedure filelayout_commit_prepare [2021-11-20 23:13:08,732 INFO L130 BoogieDeclarations]: Found specification of procedure nfs4_fl_prepare_ds [2021-11-20 23:13:08,732 INFO L138 BoogieDeclarations]: Found implementation of procedure nfs4_fl_prepare_ds [2021-11-20 23:13:08,732 INFO L130 BoogieDeclarations]: Found specification of procedure filelayout_reset_write [2021-11-20 23:13:08,732 INFO L138 BoogieDeclarations]: Found implementation of procedure filelayout_reset_write [2021-11-20 23:13:08,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-20 23:13:08,732 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-20 23:13:08,733 INFO L130 BoogieDeclarations]: Found specification of procedure lowmem_page_address [2021-11-20 23:13:08,733 INFO L138 BoogieDeclarations]: Found implementation of procedure lowmem_page_address [2021-11-20 23:13:08,733 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-20 23:13:08,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-20 23:13:08,733 INFO L130 BoogieDeclarations]: Found specification of procedure __might_sleep [2021-11-20 23:13:08,733 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_sleep [2021-11-20 23:13:08,734 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-20 23:13:08,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-20 23:13:08,734 INFO L130 BoogieDeclarations]: Found specification of procedure nfs_init_commit [2021-11-20 23:13:08,734 INFO L138 BoogieDeclarations]: Found implementation of procedure nfs_init_commit [2021-11-20 23:13:08,734 INFO L130 BoogieDeclarations]: Found specification of procedure xdr_init_decode_pages [2021-11-20 23:13:08,735 INFO L138 BoogieDeclarations]: Found implementation of procedure xdr_init_decode_pages [2021-11-20 23:13:08,735 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-11-20 23:13:08,735 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-11-20 23:13:08,735 INFO L130 BoogieDeclarations]: Found specification of procedure filelayout_free_lseg [2021-11-20 23:13:08,735 INFO L138 BoogieDeclarations]: Found implementation of procedure filelayout_free_lseg [2021-11-20 23:13:08,735 INFO L130 BoogieDeclarations]: Found specification of procedure NFS_SERVER [2021-11-20 23:13:08,736 INFO L138 BoogieDeclarations]: Found implementation of procedure NFS_SERVER [2021-11-20 23:13:08,736 INFO L130 BoogieDeclarations]: Found specification of procedure nfs4_fl_select_ds_fh [2021-11-20 23:13:08,736 INFO L138 BoogieDeclarations]: Found implementation of procedure nfs4_fl_select_ds_fh [2021-11-20 23:13:08,736 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_pages [2021-11-20 23:13:08,736 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_pages [2021-11-20 23:13:08,736 INFO L130 BoogieDeclarations]: Found specification of procedure FILELAYOUT_LSEG [2021-11-20 23:13:08,737 INFO L138 BoogieDeclarations]: Found implementation of procedure FILELAYOUT_LSEG [2021-11-20 23:13:08,737 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-20 23:13:08,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-20 23:13:08,737 INFO L130 BoogieDeclarations]: Found specification of procedure filelayout_pg_init_read [2021-11-20 23:13:08,737 INFO L138 BoogieDeclarations]: Found implementation of procedure filelayout_pg_init_read [2021-11-20 23:13:08,738 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2021-11-20 23:13:08,738 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-20 23:13:08,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-20 23:13:08,738 INFO L130 BoogieDeclarations]: Found specification of procedure nfs4_fl_calc_j_index [2021-11-20 23:13:08,738 INFO L138 BoogieDeclarations]: Found implementation of procedure nfs4_fl_calc_j_index [2021-11-20 23:13:08,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 23:13:08,739 INFO L130 BoogieDeclarations]: Found specification of procedure filelayout_read_count_stats [2021-11-20 23:13:08,739 INFO L138 BoogieDeclarations]: Found implementation of procedure filelayout_read_count_stats [2021-11-20 23:13:08,739 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-20 23:13:08,739 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-20 23:13:08,739 INFO L130 BoogieDeclarations]: Found specification of procedure pnfs_get_lseg [2021-11-20 23:13:08,740 INFO L138 BoogieDeclarations]: Found implementation of procedure pnfs_get_lseg [2021-11-20 23:13:08,740 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-11-20 23:13:08,740 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-11-20 23:13:08,740 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-20 23:13:08,740 INFO L130 BoogieDeclarations]: Found specification of procedure nfs_pageio_reset_read_mds [2021-11-20 23:13:08,740 INFO L138 BoogieDeclarations]: Found implementation of procedure nfs_pageio_reset_read_mds [2021-11-20 23:13:08,741 INFO L130 BoogieDeclarations]: Found specification of procedure filelayout_recover_commit_reqs [2021-11-20 23:13:08,741 INFO L138 BoogieDeclarations]: Found implementation of procedure filelayout_recover_commit_reqs [2021-11-20 23:13:08,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-20 23:13:08,838 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-20 23:13:08,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-20 23:13:08,839 INFO L130 BoogieDeclarations]: Found specification of procedure filelayout_pg_test [2021-11-20 23:13:08,839 INFO L138 BoogieDeclarations]: Found implementation of procedure filelayout_pg_test [2021-11-20 23:13:08,839 INFO L130 BoogieDeclarations]: Found specification of procedure filelayout_pg_init_write [2021-11-20 23:13:08,839 INFO L138 BoogieDeclarations]: Found implementation of procedure filelayout_pg_init_write [2021-11-20 23:13:08,839 INFO L130 BoogieDeclarations]: Found specification of procedure transfer_commit_list [2021-11-20 23:13:08,839 INFO L138 BoogieDeclarations]: Found implementation of procedure transfer_commit_list [2021-11-20 23:13:08,839 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 23:13:08,839 INFO L130 BoogieDeclarations]: Found specification of procedure filelayout_commit_release [2021-11-20 23:13:08,839 INFO L138 BoogieDeclarations]: Found implementation of procedure filelayout_commit_release [2021-11-20 23:13:08,840 INFO L130 BoogieDeclarations]: Found specification of procedure filelayout_free_layout_hdr [2021-11-20 23:13:08,840 INFO L138 BoogieDeclarations]: Found implementation of procedure filelayout_free_layout_hdr [2021-11-20 23:13:08,840 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-20 23:13:08,840 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-20 23:13:08,840 INFO L130 BoogieDeclarations]: Found specification of procedure nfs4_find_or_create_ds_client [2021-11-20 23:13:08,840 INFO L138 BoogieDeclarations]: Found implementation of procedure nfs4_find_or_create_ds_client [2021-11-20 23:13:08,840 INFO L130 BoogieDeclarations]: Found specification of procedure list_add_tail [2021-11-20 23:13:08,840 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add_tail [2021-11-20 23:13:08,840 INFO L130 BoogieDeclarations]: Found specification of procedure div_u64_rem [2021-11-20 23:13:08,840 INFO L138 BoogieDeclarations]: Found implementation of procedure div_u64_rem [2021-11-20 23:13:08,841 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-20 23:13:08,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-20 23:13:08,841 INFO L130 BoogieDeclarations]: Found specification of procedure filelayout_free_deveiceid_node [2021-11-20 23:13:08,841 INFO L138 BoogieDeclarations]: Found implementation of procedure filelayout_free_deveiceid_node [2021-11-20 23:13:08,841 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 23:13:08,841 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_1 [2021-11-20 23:13:08,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_1 [2021-11-20 23:13:08,841 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_0 [2021-11-20 23:13:08,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_0 [2021-11-20 23:13:08,842 INFO L130 BoogieDeclarations]: Found specification of procedure nfs_request_remove_commit_list [2021-11-20 23:13:08,842 INFO L138 BoogieDeclarations]: Found implementation of procedure nfs_request_remove_commit_list [2021-11-20 23:13:08,842 INFO L130 BoogieDeclarations]: Found specification of procedure filelayout_write_commit_done [2021-11-20 23:13:08,842 INFO L138 BoogieDeclarations]: Found implementation of procedure filelayout_write_commit_done [2021-11-20 23:13:08,842 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2021-11-20 23:13:08,842 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2021-11-20 23:13:08,842 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:13:08,842 INFO L130 BoogieDeclarations]: Found specification of procedure FILELAYOUT_FROM_HDR [2021-11-20 23:13:08,842 INFO L138 BoogieDeclarations]: Found implementation of procedure FILELAYOUT_FROM_HDR [2021-11-20 23:13:08,842 INFO L130 BoogieDeclarations]: Found specification of procedure xdr_inline_decode [2021-11-20 23:13:08,843 INFO L138 BoogieDeclarations]: Found implementation of procedure xdr_inline_decode [2021-11-20 23:13:08,843 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-20 23:13:08,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-20 23:13:08,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 23:13:08,843 INFO L130 BoogieDeclarations]: Found specification of procedure filelayout_alloc_layout_hdr [2021-11-20 23:13:08,843 INFO L138 BoogieDeclarations]: Found implementation of procedure filelayout_alloc_layout_hdr [2021-11-20 23:13:08,843 INFO L130 BoogieDeclarations]: Found specification of procedure req_offset [2021-11-20 23:13:08,843 INFO L138 BoogieDeclarations]: Found implementation of procedure req_offset [2021-11-20 23:13:08,843 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-20 23:13:08,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-20 23:13:08,844 INFO L130 BoogieDeclarations]: Found specification of procedure filelayout_mark_request_commit [2021-11-20 23:13:08,844 INFO L138 BoogieDeclarations]: Found implementation of procedure filelayout_mark_request_commit [2021-11-20 23:13:08,844 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_80___0 [2021-11-20 23:13:08,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_80___0 [2021-11-20 23:13:08,844 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2021-11-20 23:13:08,844 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2021-11-20 23:13:08,844 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-20 23:13:08,844 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-20 23:13:08,845 INFO L130 BoogieDeclarations]: Found specification of procedure _filelayout_free_lseg [2021-11-20 23:13:08,845 INFO L138 BoogieDeclarations]: Found implementation of procedure _filelayout_free_lseg [2021-11-20 23:13:08,845 INFO L130 BoogieDeclarations]: Found specification of procedure filelayout_alloc_lseg [2021-11-20 23:13:08,845 INFO L138 BoogieDeclarations]: Found implementation of procedure filelayout_alloc_lseg [2021-11-20 23:13:08,845 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-20 23:13:08,845 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-20 23:13:08,845 INFO L130 BoogieDeclarations]: Found specification of procedure nfs4_set_rw_stateid [2021-11-20 23:13:08,845 INFO L138 BoogieDeclarations]: Found implementation of procedure nfs4_set_rw_stateid [2021-11-20 23:13:08,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:13:08,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:13:08,846 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-11-20 23:13:08,846 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-11-20 23:13:08,846 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-20 23:13:08,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-20 23:13:08,846 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-20 23:13:08,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-20 23:13:08,848 INFO L130 BoogieDeclarations]: Found specification of procedure filelayout_commit_count_stats [2021-11-20 23:13:08,848 INFO L138 BoogieDeclarations]: Found implementation of procedure filelayout_commit_count_stats [2021-11-20 23:13:08,848 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-20 23:13:08,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-20 23:13:08,848 INFO L130 BoogieDeclarations]: Found specification of procedure FILELAYOUT_DEVID_NODE [2021-11-20 23:13:08,848 INFO L138 BoogieDeclarations]: Found implementation of procedure FILELAYOUT_DEVID_NODE [2021-11-20 23:13:08,849 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_resend_writes [2021-11-20 23:13:08,849 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_resend_writes [2021-11-20 23:13:08,849 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_try [2021-11-20 23:13:08,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_try [2021-11-20 23:13:08,849 INFO L130 BoogieDeclarations]: Found specification of procedure nfs41_sequence_done [2021-11-20 23:13:08,849 INFO L138 BoogieDeclarations]: Found implementation of procedure nfs41_sequence_done [2021-11-20 23:13:08,850 INFO L130 BoogieDeclarations]: Found specification of procedure nfs4_fl_free_deviceid [2021-11-20 23:13:08,850 INFO L138 BoogieDeclarations]: Found implementation of procedure nfs4_fl_free_deviceid [2021-11-20 23:13:08,850 INFO L130 BoogieDeclarations]: Found specification of procedure nfs_retry_commit [2021-11-20 23:13:08,850 INFO L138 BoogieDeclarations]: Found implementation of procedure nfs_retry_commit [2021-11-20 23:13:08,850 INFO L130 BoogieDeclarations]: Found specification of procedure filelayout_scan_commit_lists [2021-11-20 23:13:08,850 INFO L138 BoogieDeclarations]: Found implementation of procedure filelayout_scan_commit_lists [2021-11-20 23:13:08,850 INFO L130 BoogieDeclarations]: Found specification of procedure filelayout_fenceme [2021-11-20 23:13:08,851 INFO L138 BoogieDeclarations]: Found implementation of procedure filelayout_fenceme [2021-11-20 23:13:08,851 INFO L130 BoogieDeclarations]: Found specification of procedure filelayout_commit_pagelist [2021-11-20 23:13:08,851 INFO L138 BoogieDeclarations]: Found implementation of procedure filelayout_commit_pagelist [2021-11-20 23:13:08,851 INFO L130 BoogieDeclarations]: Found specification of procedure pnfs_put_lseg [2021-11-20 23:13:08,851 INFO L138 BoogieDeclarations]: Found implementation of procedure pnfs_put_lseg [2021-11-20 23:13:08,851 INFO L130 BoogieDeclarations]: Found specification of procedure list_del_init [2021-11-20 23:13:08,851 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del_init [2021-11-20 23:13:08,852 INFO L130 BoogieDeclarations]: Found specification of procedure __be32_to_cpup [2021-11-20 23:13:08,852 INFO L138 BoogieDeclarations]: Found implementation of procedure __be32_to_cpup [2021-11-20 23:13:08,852 INFO L130 BoogieDeclarations]: Found specification of procedure filelayout_write_count_stats [2021-11-20 23:13:08,852 INFO L138 BoogieDeclarations]: Found implementation of procedure filelayout_write_count_stats [2021-11-20 23:13:08,852 INFO L130 BoogieDeclarations]: Found specification of procedure filelayout_reset_read [2021-11-20 23:13:08,852 INFO L138 BoogieDeclarations]: Found implementation of procedure filelayout_reset_read [2021-11-20 23:13:08,852 INFO L130 BoogieDeclarations]: Found specification of procedure rpc_exit [2021-11-20 23:13:08,853 INFO L138 BoogieDeclarations]: Found implementation of procedure rpc_exit [2021-11-20 23:13:08,853 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_read [2021-11-20 23:13:08,853 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_read [2021-11-20 23:13:08,853 INFO L130 BoogieDeclarations]: Found specification of procedure kcalloc [2021-11-20 23:13:08,853 INFO L138 BoogieDeclarations]: Found implementation of procedure kcalloc [2021-11-20 23:13:08,853 INFO L130 BoogieDeclarations]: Found specification of procedure rpc_count_iostats [2021-11-20 23:13:08,853 INFO L138 BoogieDeclarations]: Found implementation of procedure rpc_count_iostats [2021-11-20 23:13:08,854 INFO L130 BoogieDeclarations]: Found specification of procedure filelayout_clear_request_commit [2021-11-20 23:13:08,854 INFO L138 BoogieDeclarations]: Found implementation of procedure filelayout_clear_request_commit [2021-11-20 23:13:08,854 INFO L130 BoogieDeclarations]: Found specification of procedure __kmalloc [2021-11-20 23:13:08,854 INFO L138 BoogieDeclarations]: Found implementation of procedure __kmalloc [2021-11-20 23:13:08,854 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 23:13:08,854 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-20 23:13:08,861 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-20 23:13:08,861 INFO L130 BoogieDeclarations]: Found specification of procedure NFS_FILEID [2021-11-20 23:13:08,861 INFO L138 BoogieDeclarations]: Found implementation of procedure NFS_FILEID [2021-11-20 23:13:08,861 INFO L130 BoogieDeclarations]: Found specification of procedure nfs4_fl_calc_ds_index [2021-11-20 23:13:08,861 INFO L138 BoogieDeclarations]: Found implementation of procedure nfs4_fl_calc_ds_index [2021-11-20 23:13:08,862 INFO L130 BoogieDeclarations]: Found specification of procedure filelayout_get_dserver_offset [2021-11-20 23:13:08,862 INFO L138 BoogieDeclarations]: Found implementation of procedure filelayout_get_dserver_offset [2021-11-20 23:13:08,862 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 23:13:08,862 INFO L130 BoogieDeclarations]: Found specification of procedure nfs4_fl_put_deviceid [2021-11-20 23:13:08,862 INFO L138 BoogieDeclarations]: Found implementation of procedure nfs4_fl_put_deviceid [2021-11-20 23:13:08,862 INFO L130 BoogieDeclarations]: Found specification of procedure __free_pages [2021-11-20 23:13:08,863 INFO L138 BoogieDeclarations]: Found implementation of procedure __free_pages [2021-11-20 23:13:08,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 23:13:08,863 INFO L130 BoogieDeclarations]: Found specification of procedure filelayout_read_prepare [2021-11-20 23:13:08,863 INFO L138 BoogieDeclarations]: Found implementation of procedure filelayout_read_prepare [2021-11-20 23:13:08,863 INFO L130 BoogieDeclarations]: Found specification of procedure NFS_I [2021-11-20 23:13:08,863 INFO L138 BoogieDeclarations]: Found implementation of procedure NFS_I [2021-11-20 23:13:08,863 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-20 23:13:08,864 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-20 23:13:08,864 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2021-11-20 23:13:08,864 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2021-11-20 23:13:08,864 INFO L130 BoogieDeclarations]: Found specification of procedure nfs_put_client [2021-11-20 23:13:08,864 INFO L138 BoogieDeclarations]: Found implementation of procedure nfs_put_client [2021-11-20 23:13:08,864 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-20 23:13:08,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-20 23:13:08,865 INFO L130 BoogieDeclarations]: Found specification of procedure filelayout_write_call_done [2021-11-20 23:13:08,865 INFO L138 BoogieDeclarations]: Found implementation of procedure filelayout_write_call_done [2021-11-20 23:13:08,865 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-20 23:13:08,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-20 23:13:08,865 INFO L130 BoogieDeclarations]: Found specification of procedure filelayout_write_release [2021-11-20 23:13:08,865 INFO L138 BoogieDeclarations]: Found implementation of procedure filelayout_write_release [2021-11-20 23:13:08,866 INFO L130 BoogieDeclarations]: Found specification of procedure nfs41_setup_sequence [2021-11-20 23:13:08,866 INFO L138 BoogieDeclarations]: Found implementation of procedure nfs41_setup_sequence [2021-11-20 23:13:08,866 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2021-11-20 23:13:08,866 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2021-11-20 23:13:08,866 INFO L130 BoogieDeclarations]: Found specification of procedure nfs_commitdata_alloc [2021-11-20 23:13:08,866 INFO L138 BoogieDeclarations]: Found implementation of procedure nfs_commitdata_alloc [2021-11-20 23:13:08,866 INFO L130 BoogieDeclarations]: Found specification of procedure xdr_set_scratch_buffer [2021-11-20 23:13:08,867 INFO L138 BoogieDeclarations]: Found implementation of procedure xdr_set_scratch_buffer [2021-11-20 23:13:08,867 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_79 [2021-11-20 23:13:08,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_79 [2021-11-20 23:13:08,867 INFO L130 BoogieDeclarations]: Found specification of procedure filelayout_write_pagelist [2021-11-20 23:13:08,867 INFO L138 BoogieDeclarations]: Found implementation of procedure filelayout_write_pagelist [2021-11-20 23:13:08,867 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-20 23:13:08,868 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-20 23:13:08,868 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-20 23:13:08,868 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-20 23:13:08,868 INFO L130 BoogieDeclarations]: Found specification of procedure filelayout_read_call_done [2021-11-20 23:13:08,868 INFO L138 BoogieDeclarations]: Found implementation of procedure filelayout_read_call_done [2021-11-20 23:13:08,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 23:13:08,868 INFO L130 BoogieDeclarations]: Found specification of procedure filelayout_free_fh_array [2021-11-20 23:13:08,869 INFO L138 BoogieDeclarations]: Found implementation of procedure filelayout_free_fh_array [2021-11-20 23:13:08,869 INFO L130 BoogieDeclarations]: Found specification of procedure filelayout_read_pagelist [2021-11-20 23:13:08,869 INFO L138 BoogieDeclarations]: Found implementation of procedure filelayout_read_pagelist [2021-11-20 23:13:08,869 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-20 23:13:08,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-20 23:13:08,869 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_80 [2021-11-20 23:13:08,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_80 [2021-11-20 23:13:08,870 INFO L130 BoogieDeclarations]: Found specification of procedure nfs_initiate_commit [2021-11-20 23:13:08,870 INFO L138 BoogieDeclarations]: Found implementation of procedure nfs_initiate_commit [2021-11-20 23:13:08,870 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2021-11-20 23:13:08,870 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2021-11-20 23:13:08,870 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2021-11-20 23:13:08,870 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_inc [2021-11-20 23:13:08,871 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_inc [2021-11-20 23:13:08,871 INFO L130 BoogieDeclarations]: Found specification of procedure nfs4_print_deviceid [2021-11-20 23:13:08,871 INFO L138 BoogieDeclarations]: Found implementation of procedure nfs4_print_deviceid [2021-11-20 23:13:08,871 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-20 23:13:08,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-20 23:13:08,871 INFO L130 BoogieDeclarations]: Found specification of procedure pnfs_update_layout [2021-11-20 23:13:08,872 INFO L138 BoogieDeclarations]: Found implementation of procedure pnfs_update_layout [2021-11-20 23:13:08,872 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-11-20 23:13:08,872 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-11-20 23:13:08,872 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_EMGentry_exit_nfs4filelayout_exit_5_2 [2021-11-20 23:13:08,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_EMGentry_exit_nfs4filelayout_exit_5_2 [2021-11-20 23:13:08,872 INFO L130 BoogieDeclarations]: Found specification of procedure filelayout_read_release [2021-11-20 23:13:08,872 INFO L138 BoogieDeclarations]: Found implementation of procedure filelayout_read_release [2021-11-20 23:13:08,873 INFO L130 BoogieDeclarations]: Found specification of procedure nfs4_mark_deviceid_unavailable [2021-11-20 23:13:08,873 INFO L138 BoogieDeclarations]: Found implementation of procedure nfs4_mark_deviceid_unavailable [2021-11-20 23:13:08,873 INFO L130 BoogieDeclarations]: Found specification of procedure filelayout_test_devid_unavailable [2021-11-20 23:13:08,873 INFO L138 BoogieDeclarations]: Found implementation of procedure filelayout_test_devid_unavailable [2021-11-20 23:13:08,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:13:08,873 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~VOID [2021-11-20 23:13:08,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~VOID [2021-11-20 23:13:08,874 INFO L130 BoogieDeclarations]: Found specification of procedure filelayout_write_prepare [2021-11-20 23:13:08,874 INFO L138 BoogieDeclarations]: Found implementation of procedure filelayout_write_prepare [2021-11-20 23:13:08,874 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-20 23:13:08,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-20 23:13:08,874 INFO L130 BoogieDeclarations]: Found specification of procedure filelayout_reset_to_mds [2021-11-20 23:13:08,874 INFO L138 BoogieDeclarations]: Found implementation of procedure filelayout_reset_to_mds [2021-11-20 23:13:09,823 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:13:09,830 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:13:10,366 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-20 23:13:13,004 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-20 23:13:13,135 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:13:13,956 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:13:13,956 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 23:13:13,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:13:13 BoogieIcfgContainer [2021-11-20 23:13:13,962 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:13:13,964 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:13:13,964 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:13:13,967 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:13:13,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:13:02" (1/3) ... [2021-11-20 23:13:13,968 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@158e3ba4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:13:13, skipping insertion in model container [2021-11-20 23:13:13,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:08" (2/3) ... [2021-11-20 23:13:13,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@158e3ba4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:13:13, skipping insertion in model container [2021-11-20 23:13:13,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:13:13" (3/3) ... [2021-11-20 23:13:13,970 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-kernel-locking-spinlock_fs-nfs-nfs_layout_nfsv41_files.cil.i [2021-11-20 23:13:13,975 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:13:13,975 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-11-20 23:13:14,029 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:13:14,036 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 [2021-11-20 23:13:14,036 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-20 23:13:14,100 INFO L276 IsEmpty]: Start isEmpty. Operand has 1742 states, 1020 states have (on average 1.3068627450980392) internal successors, (1333), 1071 states have internal predecessors, (1333), 594 states have call successors, (594), 125 states have call predecessors, (594), 124 states have return successors, (588), 565 states have call predecessors, (588), 588 states have call successors, (588) [2021-11-20 23:13:14,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2021-11-20 23:13:14,139 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:14,140 INFO L514 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:14,141 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_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-20 23:13:14,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:14,146 INFO L85 PathProgramCache]: Analyzing trace with hash 971470416, now seen corresponding path program 1 times [2021-11-20 23:13:14,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:14,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057835259] [2021-11-20 23:13:14,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:14,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:14,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:15,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4556 trivial. 0 not checked. [2021-11-20 23:13:15,129 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:15,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057835259] [2021-11-20 23:13:15,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057835259] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:15,136 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:15,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:13:15,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439368554] [2021-11-20 23:13:15,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:15,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:13:15,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:15,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:13:15,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:13:15,193 INFO L87 Difference]: Start difference. First operand has 1742 states, 1020 states have (on average 1.3068627450980392) internal successors, (1333), 1071 states have internal predecessors, (1333), 594 states have call successors, (594), 125 states have call predecessors, (594), 124 states have return successors, (588), 565 states have call predecessors, (588), 588 states have call successors, (588) Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-20 23:13:16,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:16,521 INFO L93 Difference]: Finished difference Result 5017 states and 7377 transitions. [2021-11-20 23:13:16,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:13:16,524 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) Word has length 355 [2021-11-20 23:13:16,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:16,588 INFO L225 Difference]: With dead ends: 5017 [2021-11-20 23:13:16,588 INFO L226 Difference]: Without dead ends: 3334 [2021-11-20 23:13:16,609 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 [2021-11-20 23:13:16,613 INFO L933 BasicCegarLoop]: 2722 mSDtfsCounter, 2315 mSDsluCounter, 2470 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2315 SdHoareTripleChecker+Valid, 4892 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:16,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2315 Valid, 4892 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 23:13:16,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3334 states. [2021-11-20 23:13:16,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3334 to 3328. [2021-11-20 23:13:16,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3328 states, 1971 states have (on average 1.3033992897006597) internal successors, (2569), 2071 states have internal predecessors, (2569), 1110 states have call successors, (1110), 244 states have call predecessors, (1110), 243 states have return successors, (1106), 1060 states have call predecessors, (1106), 1106 states have call successors, (1106) [2021-11-20 23:13:16,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3328 states to 3328 states and 4785 transitions. [2021-11-20 23:13:16,964 INFO L78 Accepts]: Start accepts. Automaton has 3328 states and 4785 transitions. Word has length 355 [2021-11-20 23:13:16,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:16,969 INFO L470 AbstractCegarLoop]: Abstraction has 3328 states and 4785 transitions. [2021-11-20 23:13:16,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-20 23:13:16,971 INFO L276 IsEmpty]: Start isEmpty. Operand 3328 states and 4785 transitions. [2021-11-20 23:13:16,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2021-11-20 23:13:16,984 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:16,984 INFO L514 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:16,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:13:16,986 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_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-20 23:13:16,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:16,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1934450977, now seen corresponding path program 1 times [2021-11-20 23:13:16,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:16,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595724927] [2021-11-20 23:13:16,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:16,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:17,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:17,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4556 trivial. 0 not checked. [2021-11-20 23:13:17,489 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:17,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595724927] [2021-11-20 23:13:17,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595724927] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:17,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:17,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 23:13:17,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94538276] [2021-11-20 23:13:17,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:17,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:13:17,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:17,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:13:17,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:13:17,493 INFO L87 Difference]: Start difference. First operand 3328 states and 4785 transitions. Second operand has 6 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 3 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-20 23:13:23,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:23,855 INFO L93 Difference]: Finished difference Result 9811 states and 14080 transitions. [2021-11-20 23:13:23,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:13:23,856 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 3 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 365 [2021-11-20 23:13:23,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:23,924 INFO L225 Difference]: With dead ends: 9811 [2021-11-20 23:13:23,924 INFO L226 Difference]: Without dead ends: 6552 [2021-11-20 23:13:23,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:13:23,945 INFO L933 BasicCegarLoop]: 3242 mSDtfsCounter, 6255 mSDsluCounter, 7517 mSDsCounter, 0 mSdLazyCounter, 3115 mSolverCounterSat, 1097 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6339 SdHoareTripleChecker+Valid, 9621 SdHoareTripleChecker+Invalid, 4212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1097 IncrementalHoareTripleChecker+Valid, 3115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:23,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6339 Valid, 9621 Invalid, 4212 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1097 Valid, 3115 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2021-11-20 23:13:23,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6552 states. [2021-11-20 23:13:24,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6552 to 6474. [2021-11-20 23:13:24,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6474 states, 3855 states have (on average 1.3058365758754864) internal successors, (5034), 4055 states have internal predecessors, (5034), 2126 states have call successors, (2126), 490 states have call predecessors, (2126), 489 states have return successors, (2122), 2024 states have call predecessors, (2122), 2122 states have call successors, (2122) [2021-11-20 23:13:24,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6474 states to 6474 states and 9282 transitions. [2021-11-20 23:13:24,550 INFO L78 Accepts]: Start accepts. Automaton has 6474 states and 9282 transitions. Word has length 365 [2021-11-20 23:13:24,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:24,553 INFO L470 AbstractCegarLoop]: Abstraction has 6474 states and 9282 transitions. [2021-11-20 23:13:24,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 3 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-20 23:13:24,553 INFO L276 IsEmpty]: Start isEmpty. Operand 6474 states and 9282 transitions. [2021-11-20 23:13:24,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2021-11-20 23:13:24,561 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:24,562 INFO L514 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:24,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 23:13:24,563 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_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-20 23:13:24,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:24,564 INFO L85 PathProgramCache]: Analyzing trace with hash -305224842, now seen corresponding path program 1 times [2021-11-20 23:13:24,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:24,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961548542] [2021-11-20 23:13:24,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:24,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:24,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:24,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4556 trivial. 0 not checked. [2021-11-20 23:13:24,832 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:24,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961548542] [2021-11-20 23:13:24,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961548542] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:24,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:24,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:13:24,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801298004] [2021-11-20 23:13:24,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:24,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:13:24,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:24,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:13:24,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:13:24,835 INFO L87 Difference]: Start difference. First operand 6474 states and 9282 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-20 23:13:26,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:26,238 INFO L93 Difference]: Finished difference Result 17586 states and 25189 transitions. [2021-11-20 23:13:26,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:13:26,239 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) Word has length 369 [2021-11-20 23:13:26,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:26,353 INFO L225 Difference]: With dead ends: 17586 [2021-11-20 23:13:26,353 INFO L226 Difference]: Without dead ends: 11181 [2021-11-20 23:13:26,391 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 [2021-11-20 23:13:26,397 INFO L933 BasicCegarLoop]: 2735 mSDtfsCounter, 2317 mSDsluCounter, 2459 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2317 SdHoareTripleChecker+Valid, 4891 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:26,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2317 Valid, 4891 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 23:13:26,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11181 states. [2021-11-20 23:13:27,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11181 to 11143. [2021-11-20 23:13:27,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11143 states, 6655 states have (on average 1.3059353869271224) internal successors, (8691), 7005 states have internal predecessors, (8691), 3626 states have call successors, (3626), 859 states have call predecessors, (3626), 858 states have return successors, (3622), 3446 states have call predecessors, (3622), 3622 states have call successors, (3622) [2021-11-20 23:13:27,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11143 states to 11143 states and 15939 transitions. [2021-11-20 23:13:27,221 INFO L78 Accepts]: Start accepts. Automaton has 11143 states and 15939 transitions. Word has length 369 [2021-11-20 23:13:27,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:27,222 INFO L470 AbstractCegarLoop]: Abstraction has 11143 states and 15939 transitions. [2021-11-20 23:13:27,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-20 23:13:27,223 INFO L276 IsEmpty]: Start isEmpty. Operand 11143 states and 15939 transitions. [2021-11-20 23:13:27,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2021-11-20 23:13:27,232 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:27,232 INFO L514 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:27,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 23:13:27,232 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_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-20 23:13:27,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:27,233 INFO L85 PathProgramCache]: Analyzing trace with hash 2109525623, now seen corresponding path program 1 times [2021-11-20 23:13:27,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:27,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317498447] [2021-11-20 23:13:27,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:27,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:27,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:27,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4556 trivial. 0 not checked. [2021-11-20 23:13:27,460 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:27,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317498447] [2021-11-20 23:13:27,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317498447] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:27,460 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:27,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:13:27,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101751028] [2021-11-20 23:13:27,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:27,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:13:27,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:27,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:13:27,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:13:27,464 INFO L87 Difference]: Start difference. First operand 11143 states and 15939 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-20 23:13:29,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:29,377 INFO L93 Difference]: Finished difference Result 31371 states and 44791 transitions. [2021-11-20 23:13:29,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:13:29,377 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 366 [2021-11-20 23:13:29,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:29,531 INFO L225 Difference]: With dead ends: 31371 [2021-11-20 23:13:29,531 INFO L226 Difference]: Without dead ends: 20297 [2021-11-20 23:13:29,587 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 [2021-11-20 23:13:29,588 INFO L933 BasicCegarLoop]: 2714 mSDtfsCounter, 2275 mSDsluCounter, 2424 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2275 SdHoareTripleChecker+Valid, 4855 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:29,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2275 Valid, 4855 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 23:13:29,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20297 states. [2021-11-20 23:13:30,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20297 to 20249. [2021-11-20 23:13:30,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20249 states, 12083 states have (on average 1.3019117768766035) internal successors, (15731), 12743 states have internal predecessors, (15731), 6566 states have call successors, (6566), 1597 states have call predecessors, (6566), 1596 states have return successors, (6562), 6220 states have call predecessors, (6562), 6562 states have call successors, (6562) [2021-11-20 23:13:31,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20249 states to 20249 states and 28859 transitions. [2021-11-20 23:13:31,081 INFO L78 Accepts]: Start accepts. Automaton has 20249 states and 28859 transitions. Word has length 366 [2021-11-20 23:13:31,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:31,084 INFO L470 AbstractCegarLoop]: Abstraction has 20249 states and 28859 transitions. [2021-11-20 23:13:31,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-20 23:13:31,084 INFO L276 IsEmpty]: Start isEmpty. Operand 20249 states and 28859 transitions. [2021-11-20 23:13:31,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2021-11-20 23:13:31,095 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:31,096 INFO L514 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:31,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 23:13:31,096 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-20 23:13:31,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:31,097 INFO L85 PathProgramCache]: Analyzing trace with hash 746040115, now seen corresponding path program 1 times [2021-11-20 23:13:31,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:31,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57150044] [2021-11-20 23:13:31,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:31,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:31,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:31,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4556 trivial. 0 not checked. [2021-11-20 23:13:31,323 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:31,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57150044] [2021-11-20 23:13:31,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57150044] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:31,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:31,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:13:31,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789721637] [2021-11-20 23:13:31,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:31,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:13:31,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:31,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:13:31,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:13:31,326 INFO L87 Difference]: Start difference. First operand 20249 states and 28859 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-20 23:13:33,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:33,773 INFO L93 Difference]: Finished difference Result 52984 states and 75116 transitions. [2021-11-20 23:13:33,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:13:33,773 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 367 [2021-11-20 23:13:33,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:33,961 INFO L225 Difference]: With dead ends: 52984 [2021-11-20 23:13:33,962 INFO L226 Difference]: Without dead ends: 32804 [2021-11-20 23:13:34,033 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 [2021-11-20 23:13:34,034 INFO L933 BasicCegarLoop]: 3505 mSDtfsCounter, 2274 mSDsluCounter, 2424 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2274 SdHoareTripleChecker+Valid, 5646 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:34,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2274 Valid, 5646 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-20 23:13:34,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32804 states. [2021-11-20 23:13:35,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32804 to 32756. [2021-11-20 23:13:35,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32756 states, 19441 states have (on average 1.2947893626871045) internal successors, (25172), 20602 states have internal predecessors, (25172), 10533 states have call successors, (10533), 2779 states have call predecessors, (10533), 2778 states have return successors, (10529), 9862 states have call predecessors, (10529), 10529 states have call successors, (10529) [2021-11-20 23:13:36,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32756 states to 32756 states and 46234 transitions. [2021-11-20 23:13:36,092 INFO L78 Accepts]: Start accepts. Automaton has 32756 states and 46234 transitions. Word has length 367 [2021-11-20 23:13:36,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:36,093 INFO L470 AbstractCegarLoop]: Abstraction has 32756 states and 46234 transitions. [2021-11-20 23:13:36,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-20 23:13:36,094 INFO L276 IsEmpty]: Start isEmpty. Operand 32756 states and 46234 transitions. [2021-11-20 23:13:36,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2021-11-20 23:13:36,102 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:36,103 INFO L514 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:36,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 23:13:36,104 INFO L402 AbstractCegarLoop]: === Iteration 6 === 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_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-20 23:13:36,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:36,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1524565799, now seen corresponding path program 1 times [2021-11-20 23:13:36,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:36,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041999267] [2021-11-20 23:13:36,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:36,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:36,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:36,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4556 trivial. 0 not checked. [2021-11-20 23:13:36,500 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:36,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041999267] [2021-11-20 23:13:36,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041999267] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:36,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:36,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:13:36,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496071374] [2021-11-20 23:13:36,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:36,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:13:36,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:36,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:13:36,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:13:36,503 INFO L87 Difference]: Start difference. First operand 32756 states and 46234 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2021-11-20 23:13:39,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:39,693 INFO L93 Difference]: Finished difference Result 93867 states and 132538 transitions. [2021-11-20 23:13:39,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:13:39,694 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) Word has length 372 [2021-11-20 23:13:39,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:40,001 INFO L225 Difference]: With dead ends: 93867 [2021-11-20 23:13:40,002 INFO L226 Difference]: Without dead ends: 61180 [2021-11-20 23:13:40,095 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 [2021-11-20 23:13:40,097 INFO L933 BasicCegarLoop]: 3051 mSDtfsCounter, 2318 mSDsluCounter, 2459 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2318 SdHoareTripleChecker+Valid, 5207 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:40,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2318 Valid, 5207 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-20 23:13:40,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61180 states. [2021-11-20 23:13:43,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61180 to 61136. [2021-11-20 23:13:43,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61136 states, 36462 states have (on average 1.294361252811146) internal successors, (47195), 38549 states have internal predecessors, (47195), 19517 states have call successors, (19517), 5154 states have call predecessors, (19517), 5153 states have return successors, (19513), 18356 states have call predecessors, (19513), 19513 states have call successors, (19513) [2021-11-20 23:13:43,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61136 states to 61136 states and 86225 transitions. [2021-11-20 23:13:43,468 INFO L78 Accepts]: Start accepts. Automaton has 61136 states and 86225 transitions. Word has length 372 [2021-11-20 23:13:43,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:43,469 INFO L470 AbstractCegarLoop]: Abstraction has 61136 states and 86225 transitions. [2021-11-20 23:13:43,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2021-11-20 23:13:43,469 INFO L276 IsEmpty]: Start isEmpty. Operand 61136 states and 86225 transitions. [2021-11-20 23:13:43,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2021-11-20 23:13:43,477 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:43,477 INFO L514 BasicCegarLoop]: trace histogram [37, 34, 34, 34, 34, 34, 34, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:43,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 23:13:43,477 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_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-20 23:13:43,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:43,478 INFO L85 PathProgramCache]: Analyzing trace with hash 2014675730, now seen corresponding path program 1 times [2021-11-20 23:13:43,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:43,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811692575] [2021-11-20 23:13:43,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:43,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:43,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:44,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4702 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4702 trivial. 0 not checked. [2021-11-20 23:13:44,141 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:44,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811692575] [2021-11-20 23:13:44,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811692575] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:44,142 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:44,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:13:44,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512521817] [2021-11-20 23:13:44,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:44,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:13:44,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:44,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:13:44,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:13:44,145 INFO L87 Difference]: Start difference. First operand 61136 states and 86225 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (42), 3 states have call predecessors, (42), 1 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) [2021-11-20 23:13:46,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:46,645 INFO L93 Difference]: Finished difference Result 61142 states and 86230 transitions. [2021-11-20 23:13:46,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:13:46,645 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (42), 3 states have call predecessors, (42), 1 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) Word has length 383 [2021-11-20 23:13:46,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:46,901 INFO L225 Difference]: With dead ends: 61142 [2021-11-20 23:13:46,901 INFO L226 Difference]: Without dead ends: 61140 [2021-11-20 23:13:46,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:13:46,930 INFO L933 BasicCegarLoop]: 2174 mSDtfsCounter, 2392 mSDsluCounter, 4952 mSDsCounter, 0 mSdLazyCounter, 957 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2408 SdHoareTripleChecker+Valid, 6504 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:46,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2408 Valid, 6504 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 957 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 23:13:46,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61140 states. [2021-11-20 23:13:49,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61140 to 61140. [2021-11-20 23:13:49,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61140 states, 36465 states have (on average 1.2943370355135062) internal successors, (47198), 38552 states have internal predecessors, (47198), 19517 states have call successors, (19517), 5155 states have call predecessors, (19517), 5154 states have return successors, (19513), 18356 states have call predecessors, (19513), 19513 states have call successors, (19513) [2021-11-20 23:13:49,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61140 states to 61140 states and 86228 transitions. [2021-11-20 23:13:49,869 INFO L78 Accepts]: Start accepts. Automaton has 61140 states and 86228 transitions. Word has length 383 [2021-11-20 23:13:49,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:49,870 INFO L470 AbstractCegarLoop]: Abstraction has 61140 states and 86228 transitions. [2021-11-20 23:13:49,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (42), 3 states have call predecessors, (42), 1 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) [2021-11-20 23:13:49,870 INFO L276 IsEmpty]: Start isEmpty. Operand 61140 states and 86228 transitions. [2021-11-20 23:13:49,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2021-11-20 23:13:49,878 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:49,879 INFO L514 BasicCegarLoop]: trace histogram [37, 34, 34, 34, 34, 34, 34, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:49,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 23:13:49,879 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_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-20 23:13:49,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:49,880 INFO L85 PathProgramCache]: Analyzing trace with hash -315231652, now seen corresponding path program 1 times [2021-11-20 23:13:49,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:49,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991734926] [2021-11-20 23:13:49,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:49,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:49,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:50,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4702 trivial. 0 not checked. [2021-11-20 23:13:50,159 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:50,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991734926] [2021-11-20 23:13:50,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991734926] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:50,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:50,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:13:50,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993373254] [2021-11-20 23:13:50,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:50,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:13:50,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:50,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:13:50,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:13:50,162 INFO L87 Difference]: Start difference. First operand 61140 states and 86228 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (43), 3 states have call predecessors, (43), 1 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2021-11-20 23:13:53,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:53,154 INFO L93 Difference]: Finished difference Result 61146 states and 86233 transitions. [2021-11-20 23:13:53,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:13:53,155 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (43), 3 states have call predecessors, (43), 1 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) Word has length 388 [2021-11-20 23:13:53,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:53,481 INFO L225 Difference]: With dead ends: 61146 [2021-11-20 23:13:53,481 INFO L226 Difference]: Without dead ends: 61144 [2021-11-20 23:13:53,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:13:53,524 INFO L933 BasicCegarLoop]: 2177 mSDtfsCounter, 2387 mSDsluCounter, 4952 mSDsCounter, 0 mSdLazyCounter, 957 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2402 SdHoareTripleChecker+Valid, 6507 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:53,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2402 Valid, 6507 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 957 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 23:13:53,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61144 states. [2021-11-20 23:13:55,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61144 to 61144. [2021-11-20 23:13:55,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61144 states, 36468 states have (on average 1.294312822200285) internal successors, (47201), 38555 states have internal predecessors, (47201), 19517 states have call successors, (19517), 5156 states have call predecessors, (19517), 5155 states have return successors, (19513), 18356 states have call predecessors, (19513), 19513 states have call successors, (19513) [2021-11-20 23:13:56,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61144 states to 61144 states and 86231 transitions. [2021-11-20 23:13:56,446 INFO L78 Accepts]: Start accepts. Automaton has 61144 states and 86231 transitions. Word has length 388 [2021-11-20 23:13:56,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:56,447 INFO L470 AbstractCegarLoop]: Abstraction has 61144 states and 86231 transitions. [2021-11-20 23:13:56,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (43), 3 states have call predecessors, (43), 1 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2021-11-20 23:13:56,448 INFO L276 IsEmpty]: Start isEmpty. Operand 61144 states and 86231 transitions. [2021-11-20 23:13:56,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2021-11-20 23:13:56,458 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:56,459 INFO L514 BasicCegarLoop]: trace histogram [37, 34, 34, 34, 34, 34, 34, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:56,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 23:13:56,460 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_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-20 23:13:56,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:56,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1805215470, now seen corresponding path program 1 times [2021-11-20 23:13:56,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:56,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842125596] [2021-11-20 23:13:56,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:56,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:56,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:56,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4710 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4706 trivial. 0 not checked. [2021-11-20 23:13:56,792 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:56,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842125596] [2021-11-20 23:13:56,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842125596] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:56,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:56,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:13:56,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992865722] [2021-11-20 23:13:56,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:56,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:13:56,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:56,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:13:56,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:13:56,796 INFO L87 Difference]: Start difference. First operand 61144 states and 86231 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (44), 3 states have call predecessors, (44), 1 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2021-11-20 23:13:59,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:59,687 INFO L93 Difference]: Finished difference Result 61150 states and 86236 transitions. [2021-11-20 23:13:59,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:13:59,687 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (44), 3 states have call predecessors, (44), 1 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) Word has length 393 [2021-11-20 23:13:59,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:59,908 INFO L225 Difference]: With dead ends: 61150 [2021-11-20 23:13:59,908 INFO L226 Difference]: Without dead ends: 61148 [2021-11-20 23:13:59,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:13:59,929 INFO L933 BasicCegarLoop]: 2177 mSDtfsCounter, 2387 mSDsluCounter, 4952 mSDsCounter, 0 mSdLazyCounter, 957 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2401 SdHoareTripleChecker+Valid, 6507 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:59,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2401 Valid, 6507 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 957 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 23:13:59,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61148 states. [2021-11-20 23:14:02,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61148 to 61148. [2021-11-20 23:14:02,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61148 states, 36471 states have (on average 1.2942886128704998) internal successors, (47204), 38558 states have internal predecessors, (47204), 19517 states have call successors, (19517), 5157 states have call predecessors, (19517), 5156 states have return successors, (19513), 18356 states have call predecessors, (19513), 19513 states have call successors, (19513) [2021-11-20 23:14:02,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61148 states to 61148 states and 86234 transitions. [2021-11-20 23:14:02,929 INFO L78 Accepts]: Start accepts. Automaton has 61148 states and 86234 transitions. Word has length 393 [2021-11-20 23:14:02,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:14:02,930 INFO L470 AbstractCegarLoop]: Abstraction has 61148 states and 86234 transitions. [2021-11-20 23:14:02,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (44), 3 states have call predecessors, (44), 1 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2021-11-20 23:14:02,930 INFO L276 IsEmpty]: Start isEmpty. Operand 61148 states and 86234 transitions. [2021-11-20 23:14:02,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2021-11-20 23:14:02,935 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:14:02,935 INFO L514 BasicCegarLoop]: trace histogram [37, 34, 34, 34, 34, 34, 34, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:14:02,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 23:14:02,936 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_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-20 23:14:02,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:14:02,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1243844066, now seen corresponding path program 1 times [2021-11-20 23:14:02,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:14:02,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119179946] [2021-11-20 23:14:02,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:14:02,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:14:03,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:14:03,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4721 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4715 trivial. 0 not checked. [2021-11-20 23:14:03,265 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:14:03,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119179946] [2021-11-20 23:14:03,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119179946] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:14:03,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:14:03,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:14:03,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417134603] [2021-11-20 23:14:03,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:14:03,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:14:03,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:14:03,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:14:03,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:14:03,268 INFO L87 Difference]: Start difference. First operand 61148 states and 86234 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (45), 3 states have call predecessors, (45), 1 states have return successors, (43), 2 states have call predecessors, (43), 2 states have call successors, (43) [2021-11-20 23:14:06,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:14:06,401 INFO L93 Difference]: Finished difference Result 61154 states and 86239 transitions. [2021-11-20 23:14:06,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:14:06,401 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (45), 3 states have call predecessors, (45), 1 states have return successors, (43), 2 states have call predecessors, (43), 2 states have call successors, (43) Word has length 399 [2021-11-20 23:14:06,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:14:06,637 INFO L225 Difference]: With dead ends: 61154 [2021-11-20 23:14:06,638 INFO L226 Difference]: Without dead ends: 61152 [2021-11-20 23:14:06,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:14:06,666 INFO L933 BasicCegarLoop]: 2177 mSDtfsCounter, 2387 mSDsluCounter, 4952 mSDsCounter, 0 mSdLazyCounter, 957 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2400 SdHoareTripleChecker+Valid, 6507 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:14:06,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2400 Valid, 6507 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 957 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 23:14:06,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61152 states. [2021-11-20 23:14:09,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61152 to 61152. [2021-11-20 23:14:09,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61152 states, 36474 states have (on average 1.2942644075231673) internal successors, (47207), 38561 states have internal predecessors, (47207), 19517 states have call successors, (19517), 5158 states have call predecessors, (19517), 5157 states have return successors, (19513), 18356 states have call predecessors, (19513), 19513 states have call successors, (19513) [2021-11-20 23:14:09,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61152 states to 61152 states and 86237 transitions. [2021-11-20 23:14:09,881 INFO L78 Accepts]: Start accepts. Automaton has 61152 states and 86237 transitions. Word has length 399 [2021-11-20 23:14:09,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:14:09,882 INFO L470 AbstractCegarLoop]: Abstraction has 61152 states and 86237 transitions. [2021-11-20 23:14:09,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (45), 3 states have call predecessors, (45), 1 states have return successors, (43), 2 states have call predecessors, (43), 2 states have call successors, (43) [2021-11-20 23:14:09,883 INFO L276 IsEmpty]: Start isEmpty. Operand 61152 states and 86237 transitions. [2021-11-20 23:14:09,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2021-11-20 23:14:09,888 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:14:09,888 INFO L514 BasicCegarLoop]: trace histogram [37, 34, 34, 34, 34, 34, 34, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:14:09,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 23:14:09,889 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_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-20 23:14:09,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:14:09,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1482329908, now seen corresponding path program 1 times [2021-11-20 23:14:09,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:14:09,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774586863] [2021-11-20 23:14:09,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:14:09,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:14:10,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:14:10,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4735 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4727 trivial. 0 not checked. [2021-11-20 23:14:10,539 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:14:10,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774586863] [2021-11-20 23:14:10,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774586863] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:14:10,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:14:10,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:14:10,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322959383] [2021-11-20 23:14:10,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:14:10,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:14:10,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:14:10,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:14:10,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:14:10,542 INFO L87 Difference]: Start difference. First operand 61152 states and 86237 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (46), 3 states have call predecessors, (46), 1 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44)