./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-blocklayout-blocklayoutdriver.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_76d3fadd-5fd4-4c23-8478-64d2bdfbf115/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76d3fadd-5fd4-4c23-8478-64d2bdfbf115/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_76d3fadd-5fd4-4c23-8478-64d2bdfbf115/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76d3fadd-5fd4-4c23-8478-64d2bdfbf115/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-blocklayout-blocklayoutdriver.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76d3fadd-5fd4-4c23-8478-64d2bdfbf115/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_76d3fadd-5fd4-4c23-8478-64d2bdfbf115/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 9bfbecd8ca52470a88d05c2ee48bea0bde6dbc2be84932ebcf7050b5532f4c7c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:13:53,166 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:13:53,170 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:13:53,234 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:13:53,235 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:13:53,237 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:13:53,239 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:13:53,242 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:13:53,245 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:13:53,246 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:13:53,248 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:13:53,252 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:13:53,253 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:13:53,255 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:13:53,257 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:13:53,259 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:13:53,260 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:13:53,262 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:13:53,265 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:13:53,276 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:13:53,279 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:13:53,283 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:13:53,285 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:13:53,286 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:13:53,291 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:13:53,291 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:13:53,292 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:13:53,293 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:13:53,294 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:13:53,295 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:13:53,295 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:13:53,297 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:13:53,298 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:13:53,299 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:13:53,300 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:13:53,301 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:13:53,302 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:13:53,302 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:13:53,303 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:13:53,304 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:13:53,305 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:13:53,306 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76d3fadd-5fd4-4c23-8478-64d2bdfbf115/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-21 00:13:53,336 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:13:53,337 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:13:53,337 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:13:53,337 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:13:53,338 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:13:53,339 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:13:53,339 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:13:53,339 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:13:53,340 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:13:53,340 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:13:53,340 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:13:53,340 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:13:53,341 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:13:53,341 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:13:53,341 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:13:53,341 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:13:53,342 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:13:53,342 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:13:53,343 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:13:53,343 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:13:53,344 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:13:53,344 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:13:53,344 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:13:53,344 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:13:53,345 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:13:53,345 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:13:53,345 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:13:53,346 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:13:53,346 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:13:53,346 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:13:53,346 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:13:53,347 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:13:53,347 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:13:53,347 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:13:53,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:13:53,347 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:13:53,347 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:13:53,348 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:13:53,348 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_76d3fadd-5fd4-4c23-8478-64d2bdfbf115/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76d3fadd-5fd4-4c23-8478-64d2bdfbf115/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9bfbecd8ca52470a88d05c2ee48bea0bde6dbc2be84932ebcf7050b5532f4c7c [2021-11-21 00:13:53,761 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:13:53,784 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:13:53,787 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:13:53,788 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:13:53,789 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:13:53,790 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76d3fadd-5fd4-4c23-8478-64d2bdfbf115/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_fs-nfs-blocklayout-blocklayoutdriver.cil.i [2021-11-21 00:13:53,885 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76d3fadd-5fd4-4c23-8478-64d2bdfbf115/bin/utaipan-TEXQjIfE4P/data/1187f505d/a58382ec5a1d441a9d0db47ccf8b46c7/FLAG48571ecf3 [2021-11-21 00:13:55,125 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:13:55,126 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76d3fadd-5fd4-4c23-8478-64d2bdfbf115/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_fs-nfs-blocklayout-blocklayoutdriver.cil.i [2021-11-21 00:13:55,204 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76d3fadd-5fd4-4c23-8478-64d2bdfbf115/bin/utaipan-TEXQjIfE4P/data/1187f505d/a58382ec5a1d441a9d0db47ccf8b46c7/FLAG48571ecf3 [2021-11-21 00:13:55,302 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76d3fadd-5fd4-4c23-8478-64d2bdfbf115/bin/utaipan-TEXQjIfE4P/data/1187f505d/a58382ec5a1d441a9d0db47ccf8b46c7 [2021-11-21 00:13:55,306 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:13:55,309 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:13:55,310 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:13:55,310 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:13:55,314 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:13:55,315 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:13:55" (1/1) ... [2021-11-21 00:13:55,317 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17b70eb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:13:55, skipping insertion in model container [2021-11-21 00:13:55,317 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:13:55" (1/1) ... [2021-11-21 00:13:55,325 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:13:55,562 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:14:01,661 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_76d3fadd-5fd4-4c23-8478-64d2bdfbf115/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_fs-nfs-blocklayout-blocklayoutdriver.cil.i[517003,517016] [2021-11-21 00:14:01,665 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_76d3fadd-5fd4-4c23-8478-64d2bdfbf115/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_fs-nfs-blocklayout-blocklayoutdriver.cil.i[517172,517185] [2021-11-21 00:14:01,666 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_76d3fadd-5fd4-4c23-8478-64d2bdfbf115/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_fs-nfs-blocklayout-blocklayoutdriver.cil.i[517339,517352] [2021-11-21 00:14:01,666 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_76d3fadd-5fd4-4c23-8478-64d2bdfbf115/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_fs-nfs-blocklayout-blocklayoutdriver.cil.i[517507,517520] [2021-11-21 00:14:01,694 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:14:01,717 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:14:02,311 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_76d3fadd-5fd4-4c23-8478-64d2bdfbf115/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_fs-nfs-blocklayout-blocklayoutdriver.cil.i[517003,517016] [2021-11-21 00:14:02,311 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_76d3fadd-5fd4-4c23-8478-64d2bdfbf115/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_fs-nfs-blocklayout-blocklayoutdriver.cil.i[517172,517185] [2021-11-21 00:14:02,317 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_76d3fadd-5fd4-4c23-8478-64d2bdfbf115/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_fs-nfs-blocklayout-blocklayoutdriver.cil.i[517339,517352] [2021-11-21 00:14:02,317 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_76d3fadd-5fd4-4c23-8478-64d2bdfbf115/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_fs-nfs-blocklayout-blocklayoutdriver.cil.i[517507,517520] [2021-11-21 00:14:02,328 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:14:02,645 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:14:02,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:14:02 WrapperNode [2021-11-21 00:14:02,646 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:14:02,647 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:14:02,647 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:14:02,647 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:14:02,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:14:02" (1/1) ... [2021-11-21 00:14:02,780 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:14:02" (1/1) ... [2021-11-21 00:14:03,044 INFO L137 Inliner]: procedures = 584, calls = 2495, calls flagged for inlining = 241, calls inlined = 220, statements flattened = 7034 [2021-11-21 00:14:03,045 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:14:03,046 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:14:03,046 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:14:03,046 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:14:03,056 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:14:02" (1/1) ... [2021-11-21 00:14:03,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:14:02" (1/1) ... [2021-11-21 00:14:03,092 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:14:02" (1/1) ... [2021-11-21 00:14:03,093 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:14:02" (1/1) ... [2021-11-21 00:14:03,393 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:14:02" (1/1) ... [2021-11-21 00:14:03,439 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:14:02" (1/1) ... [2021-11-21 00:14:03,495 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:14:02" (1/1) ... [2021-11-21 00:14:03,542 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:14:03,543 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:14:03,544 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:14:03,544 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:14:03,545 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:14:02" (1/1) ... [2021-11-21 00:14:03,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:14:03,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76d3fadd-5fd4-4c23-8478-64d2bdfbf115/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:14:03,589 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76d3fadd-5fd4-4c23-8478-64d2bdfbf115/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:14:03,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76d3fadd-5fd4-4c23-8478-64d2bdfbf115/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:14:03,654 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_parallel [2021-11-21 00:14:03,654 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_parallel [2021-11-21 00:14:03,654 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2021-11-21 00:14:03,654 INFO L130 BoogieDeclarations]: Found specification of procedure i_size_read [2021-11-21 00:14:03,655 INFO L138 BoogieDeclarations]: Found implementation of procedure i_size_read [2021-11-21 00:14:03,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-21 00:14:03,655 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-21 00:14:03,655 INFO L130 BoogieDeclarations]: Found specification of procedure add_to_commitlist [2021-11-21 00:14:03,655 INFO L138 BoogieDeclarations]: Found implementation of procedure add_to_commitlist [2021-11-21 00:14:03,656 INFO L130 BoogieDeclarations]: Found specification of procedure rpc_put_sb_net [2021-11-21 00:14:03,656 INFO L138 BoogieDeclarations]: Found implementation of procedure rpc_put_sb_net [2021-11-21 00:14:03,656 INFO L130 BoogieDeclarations]: Found specification of procedure lowmem_page_address [2021-11-21 00:14:03,656 INFO L138 BoogieDeclarations]: Found implementation of procedure lowmem_page_address [2021-11-21 00:14:03,656 INFO L130 BoogieDeclarations]: Found specification of procedure debug_lockdep_rcu_enabled [2021-11-21 00:14:03,657 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_lockdep_rcu_enabled [2021-11-21 00:14:03,657 INFO L130 BoogieDeclarations]: Found specification of procedure bl_write_pagelist [2021-11-21 00:14:03,657 INFO L138 BoogieDeclarations]: Found implementation of procedure bl_write_pagelist [2021-11-21 00:14:03,657 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-21 00:14:03,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-21 00:14:03,658 INFO L130 BoogieDeclarations]: Found specification of procedure bio_alloc [2021-11-21 00:14:03,658 INFO L138 BoogieDeclarations]: Found implementation of procedure bio_alloc [2021-11-21 00:14:03,658 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-21 00:14:03,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-21 00:14:03,658 INFO L130 BoogieDeclarations]: Found specification of procedure pnfs_unregister_layoutdriver [2021-11-21 00:14:03,659 INFO L138 BoogieDeclarations]: Found implementation of procedure pnfs_unregister_layoutdriver [2021-11-21 00:14:03,659 INFO L130 BoogieDeclarations]: Found specification of procedure trylock_page [2021-11-21 00:14:03,659 INFO L138 BoogieDeclarations]: Found implementation of procedure trylock_page [2021-11-21 00:14:03,660 INFO L130 BoogieDeclarations]: Found specification of procedure submit_bio [2021-11-21 00:14:03,660 INFO L138 BoogieDeclarations]: Found implementation of procedure submit_bio [2021-11-21 00:14:03,660 INFO L130 BoogieDeclarations]: Found specification of procedure BLK_LSEG2EXT [2021-11-21 00:14:03,660 INFO L138 BoogieDeclarations]: Found implementation of procedure BLK_LSEG2EXT [2021-11-21 00:14:03,661 INFO L130 BoogieDeclarations]: Found specification of procedure nfs4blocklayout_unregister_sb [2021-11-21 00:14:03,661 INFO L138 BoogieDeclarations]: Found implementation of procedure nfs4blocklayout_unregister_sb [2021-11-21 00:14:03,661 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~VOID [2021-11-21 00:14:03,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~VOID [2021-11-21 00:14:03,662 INFO L130 BoogieDeclarations]: Found specification of procedure NFS_SERVER [2021-11-21 00:14:03,662 INFO L138 BoogieDeclarations]: Found implementation of procedure NFS_SERVER [2021-11-21 00:14:03,662 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-21 00:14:03,663 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-21 00:14:03,663 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-21 00:14:03,663 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_lock_release [2021-11-21 00:14:03,663 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_lock_release [2021-11-21 00:14:03,664 INFO L130 BoogieDeclarations]: Found specification of procedure BLK_LO2EXT [2021-11-21 00:14:03,665 INFO L138 BoogieDeclarations]: Found implementation of procedure BLK_LO2EXT [2021-11-21 00:14:03,665 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_pages [2021-11-21 00:14:03,666 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_pages [2021-11-21 00:14:03,666 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-21 00:14:03,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-21 00:14:03,666 INFO L130 BoogieDeclarations]: Found specification of procedure print_page [2021-11-21 00:14:03,666 INFO L138 BoogieDeclarations]: Found implementation of procedure print_page [2021-11-21 00:14:03,667 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2021-11-21 00:14:03,667 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-21 00:14:03,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-21 00:14:03,668 INFO L130 BoogieDeclarations]: Found specification of procedure PageWriteback [2021-11-21 00:14:03,669 INFO L138 BoogieDeclarations]: Found implementation of procedure PageWriteback [2021-11-21 00:14:03,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 00:14:03,669 INFO L130 BoogieDeclarations]: Found specification of procedure bl_free_layout_hdr [2021-11-21 00:14:03,669 INFO L138 BoogieDeclarations]: Found implementation of procedure bl_free_layout_hdr [2021-11-21 00:14:03,669 INFO L130 BoogieDeclarations]: Found specification of procedure print_clist [2021-11-21 00:14:03,670 INFO L138 BoogieDeclarations]: Found implementation of procedure print_clist [2021-11-21 00:14:03,670 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2021-11-21 00:14:03,670 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2021-11-21 00:14:03,670 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-21 00:14:03,670 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-21 00:14:03,671 INFO L130 BoogieDeclarations]: Found specification of procedure zero_user_segments [2021-11-21 00:14:03,671 INFO L138 BoogieDeclarations]: Found implementation of procedure zero_user_segments [2021-11-21 00:14:03,671 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-11-21 00:14:03,672 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-11-21 00:14:03,672 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2021-11-21 00:14:03,673 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2021-11-21 00:14:03,673 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-21 00:14:03,673 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-11-21 00:14:03,673 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-11-21 00:14:03,673 INFO L130 BoogieDeclarations]: Found specification of procedure bl_alloc_layout_hdr [2021-11-21 00:14:03,674 INFO L138 BoogieDeclarations]: Found implementation of procedure bl_alloc_layout_hdr [2021-11-21 00:14:03,674 INFO L130 BoogieDeclarations]: Found specification of procedure PageDirty [2021-11-21 00:14:03,674 INFO L138 BoogieDeclarations]: Found implementation of procedure PageDirty [2021-11-21 00:14:03,675 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-21 00:14:03,675 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-21 00:14:03,675 INFO L130 BoogieDeclarations]: Found specification of procedure is_writable [2021-11-21 00:14:03,676 INFO L138 BoogieDeclarations]: Found implementation of procedure is_writable [2021-11-21 00:14:03,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-21 00:14:03,676 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-21 00:14:03,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-21 00:14:03,678 INFO L130 BoogieDeclarations]: Found specification of procedure normalize [2021-11-21 00:14:03,678 INFO L138 BoogieDeclarations]: Found implementation of procedure normalize [2021-11-21 00:14:03,678 INFO L130 BoogieDeclarations]: Found specification of procedure kref_get [2021-11-21 00:14:03,679 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_get [2021-11-21 00:14:03,679 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 00:14:03,679 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_bh_80 [2021-11-21 00:14:03,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_bh_80 [2021-11-21 00:14:03,680 INFO L130 BoogieDeclarations]: Found specification of procedure nfs4blocklayout_net_exit [2021-11-21 00:14:03,680 INFO L138 BoogieDeclarations]: Found implementation of procedure nfs4blocklayout_net_exit [2021-11-21 00:14:03,680 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-21 00:14:03,680 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-21 00:14:03,681 INFO L130 BoogieDeclarations]: Found specification of procedure rpc_get_sb_net [2021-11-21 00:14:03,681 INFO L138 BoogieDeclarations]: Found implementation of procedure rpc_get_sb_net [2021-11-21 00:14:03,681 INFO L130 BoogieDeclarations]: Found specification of procedure extents_consistent [2021-11-21 00:14:03,682 INFO L138 BoogieDeclarations]: Found implementation of procedure extents_consistent [2021-11-21 00:14:03,682 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_is_watching [2021-11-21 00:14:03,682 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_is_watching [2021-11-21 00:14:03,683 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_rpc_pipefs_notifier_unregister [2021-11-21 00:14:03,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_rpc_pipefs_notifier_unregister [2021-11-21 00:14:03,683 INFO L130 BoogieDeclarations]: Found specification of procedure bl_submit_bio [2021-11-21 00:14:03,684 INFO L138 BoogieDeclarations]: Found implementation of procedure bl_submit_bio [2021-11-21 00:14:03,685 INFO L130 BoogieDeclarations]: Found specification of procedure list_add_tail [2021-11-21 00:14:03,688 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add_tail [2021-11-21 00:14:03,688 INFO L130 BoogieDeclarations]: Found specification of procedure rpc_queue_upcall [2021-11-21 00:14:03,688 INFO L138 BoogieDeclarations]: Found implementation of procedure rpc_queue_upcall [2021-11-21 00:14:03,689 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2021-11-21 00:14:03,689 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2021-11-21 00:14:03,689 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock [2021-11-21 00:14:03,690 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock [2021-11-21 00:14:03,691 INFO L130 BoogieDeclarations]: Found specification of procedure bl_put_extent [2021-11-21 00:14:03,691 INFO L138 BoogieDeclarations]: Found implementation of procedure bl_put_extent [2021-11-21 00:14:03,697 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-21 00:14:03,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-21 00:14:03,698 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 00:14:03,698 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_1 [2021-11-21 00:14:03,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_1 [2021-11-21 00:14:03,698 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_0 [2021-11-21 00:14:03,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_0 [2021-11-21 00:14:03,699 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_2 [2021-11-21 00:14:03,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_2 [2021-11-21 00:14:03,699 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2021-11-21 00:14:03,699 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2021-11-21 00:14:03,699 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:14:03,699 INFO L130 BoogieDeclarations]: Found specification of procedure xdr_inline_decode [2021-11-21 00:14:03,700 INFO L138 BoogieDeclarations]: Found implementation of procedure xdr_inline_decode [2021-11-21 00:14:03,700 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-21 00:14:03,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-21 00:14:03,700 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 00:14:03,700 INFO L130 BoogieDeclarations]: Found specification of procedure clean_pnfs_block_layoutupdate [2021-11-21 00:14:03,701 INFO L138 BoogieDeclarations]: Found implementation of procedure clean_pnfs_block_layoutupdate [2021-11-21 00:14:03,701 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-21 00:14:03,701 INFO L130 BoogieDeclarations]: Found specification of procedure bl_alloc_lseg [2021-11-21 00:14:03,701 INFO L138 BoogieDeclarations]: Found implementation of procedure bl_alloc_lseg [2021-11-21 00:14:03,701 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-21 00:14:03,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-21 00:14:03,702 INFO L130 BoogieDeclarations]: Found specification of procedure lock_page [2021-11-21 00:14:03,702 INFO L138 BoogieDeclarations]: Found implementation of procedure lock_page [2021-11-21 00:14:03,702 INFO L130 BoogieDeclarations]: Found specification of procedure end_page_writeback [2021-11-21 00:14:03,702 INFO L138 BoogieDeclarations]: Found implementation of procedure end_page_writeback [2021-11-21 00:14:03,702 INFO L130 BoogieDeclarations]: Found specification of procedure print_elist [2021-11-21 00:14:03,703 INFO L138 BoogieDeclarations]: Found implementation of procedure print_elist [2021-11-21 00:14:03,703 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2021-11-21 00:14:03,703 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2021-11-21 00:14:03,703 INFO L130 BoogieDeclarations]: Found specification of procedure kmap_atomic [2021-11-21 00:14:03,703 INFO L138 BoogieDeclarations]: Found implementation of procedure kmap_atomic [2021-11-21 00:14:03,703 INFO L130 BoogieDeclarations]: Found specification of procedure __init_work [2021-11-21 00:14:03,704 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_work [2021-11-21 00:14:03,704 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-21 00:14:03,704 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-21 00:14:03,704 INFO L130 BoogieDeclarations]: Found specification of procedure bl_cleanup_layoutcommit [2021-11-21 00:14:03,704 INFO L138 BoogieDeclarations]: Found implementation of procedure bl_cleanup_layoutcommit [2021-11-21 00:14:03,704 INFO L130 BoogieDeclarations]: Found specification of procedure PageLocked [2021-11-21 00:14:03,705 INFO L138 BoogieDeclarations]: Found implementation of procedure PageLocked [2021-11-21 00:14:03,705 INFO L130 BoogieDeclarations]: Found specification of procedure pnfs_generic_pg_test [2021-11-21 00:14:03,705 INFO L138 BoogieDeclarations]: Found implementation of procedure pnfs_generic_pg_test [2021-11-21 00:14:03,706 INFO L130 BoogieDeclarations]: Found specification of procedure rpc_destroy_pipe_data [2021-11-21 00:14:03,706 INFO L138 BoogieDeclarations]: Found implementation of procedure rpc_destroy_pipe_data [2021-11-21 00:14:03,706 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_parallel [2021-11-21 00:14:03,706 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_parallel [2021-11-21 00:14:03,706 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-21 00:14:03,707 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-21 00:14:03,707 INFO L130 BoogieDeclarations]: Found specification of procedure bl_is_sector_init [2021-11-21 00:14:03,707 INFO L138 BoogieDeclarations]: Found implementation of procedure bl_is_sector_init [2021-11-21 00:14:03,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:14:03,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:14:03,707 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-11-21 00:14:03,708 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-11-21 00:14:03,708 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab32 [2021-11-21 00:14:03,708 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab32 [2021-11-21 00:14:03,708 INFO L130 BoogieDeclarations]: Found specification of procedure unlock_page [2021-11-21 00:14:03,708 INFO L138 BoogieDeclarations]: Found implementation of procedure unlock_page [2021-11-21 00:14:03,709 INFO L130 BoogieDeclarations]: Found specification of procedure kref_sub [2021-11-21 00:14:03,709 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_sub [2021-11-21 00:14:03,709 INFO L130 BoogieDeclarations]: Found specification of procedure remove_wait_queue [2021-11-21 00:14:03,709 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_wait_queue [2021-11-21 00:14:03,711 INFO L130 BoogieDeclarations]: Found specification of procedure bl_clear_layoutdriver [2021-11-21 00:14:03,711 INFO L138 BoogieDeclarations]: Found implementation of procedure bl_clear_layoutdriver [2021-11-21 00:14:03,712 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-21 00:14:03,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-21 00:14:03,712 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-21 00:14:03,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-21 00:14:03,712 INFO L130 BoogieDeclarations]: Found specification of procedure bl_pipe_destroy_msg [2021-11-21 00:14:03,712 INFO L138 BoogieDeclarations]: Found implementation of procedure bl_pipe_destroy_msg [2021-11-21 00:14:03,713 INFO L130 BoogieDeclarations]: Found specification of procedure bl_read_pagelist [2021-11-21 00:14:03,713 INFO L138 BoogieDeclarations]: Found implementation of procedure bl_read_pagelist [2021-11-21 00:14:03,713 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-21 00:14:03,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-21 00:14:03,713 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-11-21 00:14:03,714 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-11-21 00:14:03,714 INFO L130 BoogieDeclarations]: Found specification of procedure print_bl_extent [2021-11-21 00:14:03,714 INFO L138 BoogieDeclarations]: Found implementation of procedure print_bl_extent [2021-11-21 00:14:03,714 INFO L130 BoogieDeclarations]: Found specification of procedure bl_end_io_read [2021-11-21 00:14:03,714 INFO L138 BoogieDeclarations]: Found implementation of procedure bl_end_io_read [2021-11-21 00:14:03,714 INFO L130 BoogieDeclarations]: Found specification of procedure __be32_to_cpup [2021-11-21 00:14:03,715 INFO L138 BoogieDeclarations]: Found implementation of procedure __be32_to_cpup [2021-11-21 00:14:03,715 INFO L130 BoogieDeclarations]: Found specification of procedure xdr_encode_hyper [2021-11-21 00:14:03,715 INFO L138 BoogieDeclarations]: Found implementation of procedure xdr_encode_hyper [2021-11-21 00:14:03,715 INFO L130 BoogieDeclarations]: Found specification of procedure bl_write_cleanup [2021-11-21 00:14:03,715 INFO L138 BoogieDeclarations]: Found implementation of procedure bl_write_cleanup [2021-11-21 00:14:03,715 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_read [2021-11-21 00:14:03,716 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_read [2021-11-21 00:14:03,716 INFO L130 BoogieDeclarations]: Found specification of procedure bl_mark_sectors_init [2021-11-21 00:14:03,716 INFO L138 BoogieDeclarations]: Found implementation of procedure bl_mark_sectors_init [2021-11-21 00:14:03,716 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-21 00:14:03,716 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-21 00:14:03,717 INFO L130 BoogieDeclarations]: Found specification of procedure free_blk_mountid [2021-11-21 00:14:03,717 INFO L138 BoogieDeclarations]: Found implementation of procedure free_blk_mountid [2021-11-21 00:14:03,717 INFO L130 BoogieDeclarations]: Found specification of procedure ERR_PTR [2021-11-21 00:14:03,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ERR_PTR [2021-11-21 00:14:03,717 INFO L130 BoogieDeclarations]: Found specification of procedure is_range_written [2021-11-21 00:14:03,717 INFO L138 BoogieDeclarations]: Found implementation of procedure is_range_written [2021-11-21 00:14:03,718 INFO L130 BoogieDeclarations]: Found specification of procedure __kmalloc [2021-11-21 00:14:03,718 INFO L138 BoogieDeclarations]: Found implementation of procedure __kmalloc [2021-11-21 00:14:03,718 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 00:14:03,718 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-21 00:14:03,718 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-21 00:14:03,718 INFO L130 BoogieDeclarations]: Found specification of procedure list_replace [2021-11-21 00:14:03,719 INFO L138 BoogieDeclarations]: Found implementation of procedure list_replace [2021-11-21 00:14:03,719 INFO L130 BoogieDeclarations]: Found specification of procedure module_put [2021-11-21 00:14:03,719 INFO L138 BoogieDeclarations]: Found implementation of procedure module_put [2021-11-21 00:14:03,719 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 00:14:03,719 INFO L130 BoogieDeclarations]: Found specification of procedure put_page [2021-11-21 00:14:03,720 INFO L138 BoogieDeclarations]: Found implementation of procedure put_page [2021-11-21 00:14:03,720 INFO L130 BoogieDeclarations]: Found specification of procedure __list_del_entry [2021-11-21 00:14:03,720 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_del_entry [2021-11-21 00:14:03,720 INFO L130 BoogieDeclarations]: Found specification of procedure is_aligned_req [2021-11-21 00:14:03,720 INFO L138 BoogieDeclarations]: Found implementation of procedure is_aligned_req [2021-11-21 00:14:03,720 INFO L130 BoogieDeclarations]: Found specification of procedure __free_pages [2021-11-21 00:14:03,721 INFO L138 BoogieDeclarations]: Found implementation of procedure __free_pages [2021-11-21 00:14:03,721 INFO L130 BoogieDeclarations]: Found specification of procedure _prep_new_extent [2021-11-21 00:14:03,722 INFO L138 BoogieDeclarations]: Found implementation of procedure _prep_new_extent [2021-11-21 00:14:03,722 INFO L130 BoogieDeclarations]: Found specification of procedure bio_put [2021-11-21 00:14:03,722 INFO L138 BoogieDeclarations]: Found implementation of procedure bio_put [2021-11-21 00:14:03,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 00:14:03,722 INFO L130 BoogieDeclarations]: Found specification of procedure print_short_extent [2021-11-21 00:14:03,722 INFO L138 BoogieDeclarations]: Found implementation of procedure print_short_extent [2021-11-21 00:14:03,722 INFO L130 BoogieDeclarations]: Found specification of procedure NFS_I [2021-11-21 00:14:03,722 INFO L138 BoogieDeclarations]: Found implementation of procedure NFS_I [2021-11-21 00:14:03,723 INFO L130 BoogieDeclarations]: Found specification of procedure xdr_reserve_space [2021-11-21 00:14:03,723 INFO L138 BoogieDeclarations]: Found implementation of procedure xdr_reserve_space [2021-11-21 00:14:03,723 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-21 00:14:03,723 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-21 00:14:03,723 INFO L130 BoogieDeclarations]: Found specification of procedure rpc_pipefs_notifier_unregister [2021-11-21 00:14:03,723 INFO L138 BoogieDeclarations]: Found implementation of procedure rpc_pipefs_notifier_unregister [2021-11-21 00:14:03,723 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_im_lock_of_pnfs_inval_markings [2021-11-21 00:14:03,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_im_lock_of_pnfs_inval_markings [2021-11-21 00:14:03,723 INFO L130 BoogieDeclarations]: Found specification of procedure add_wait_queue [2021-11-21 00:14:03,724 INFO L138 BoogieDeclarations]: Found implementation of procedure add_wait_queue [2021-11-21 00:14:03,724 INFO L130 BoogieDeclarations]: Found specification of procedure bl_push_one_short_extent [2021-11-21 00:14:03,724 INFO L138 BoogieDeclarations]: Found implementation of procedure bl_push_one_short_extent [2021-11-21 00:14:03,724 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-21 00:14:03,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-21 00:14:03,724 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_init_map [2021-11-21 00:14:03,724 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_init_map [2021-11-21 00:14:03,724 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-21 00:14:03,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-21 00:14:03,725 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_81 [2021-11-21 00:14:03,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_81 [2021-11-21 00:14:03,725 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2021-11-21 00:14:03,725 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2021-11-21 00:14:03,725 INFO L130 BoogieDeclarations]: Found specification of procedure __rcu_read_lock [2021-11-21 00:14:03,725 INFO L138 BoogieDeclarations]: Found implementation of procedure __rcu_read_lock [2021-11-21 00:14:03,725 INFO L130 BoogieDeclarations]: Found specification of procedure _set_range [2021-11-21 00:14:03,725 INFO L138 BoogieDeclarations]: Found implementation of procedure _set_range [2021-11-21 00:14:03,725 INFO L130 BoogieDeclarations]: Found specification of procedure bl_encode_layoutcommit [2021-11-21 00:14:03,726 INFO L138 BoogieDeclarations]: Found implementation of procedure bl_encode_layoutcommit [2021-11-21 00:14:03,726 INFO L130 BoogieDeclarations]: Found specification of procedure mark_extents_written [2021-11-21 00:14:03,726 INFO L138 BoogieDeclarations]: Found implementation of procedure mark_extents_written [2021-11-21 00:14:03,726 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_79 [2021-11-21 00:14:03,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_79 [2021-11-21 00:14:03,726 INFO L130 BoogieDeclarations]: Found specification of procedure _add_entry [2021-11-21 00:14:03,726 INFO L138 BoogieDeclarations]: Found implementation of procedure _add_entry [2021-11-21 00:14:03,726 INFO L130 BoogieDeclarations]: Found specification of procedure _front_merge [2021-11-21 00:14:03,726 INFO L138 BoogieDeclarations]: Found implementation of procedure _front_merge [2021-11-21 00:14:03,727 INFO L130 BoogieDeclarations]: Found specification of procedure do_add_page_to_bio [2021-11-21 00:14:03,727 INFO L138 BoogieDeclarations]: Found implementation of procedure do_add_page_to_bio [2021-11-21 00:14:03,727 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-21 00:14:03,727 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-21 00:14:03,727 INFO L130 BoogieDeclarations]: Found specification of procedure net_generic [2021-11-21 00:14:03,727 INFO L138 BoogieDeclarations]: Found implementation of procedure net_generic [2021-11-21 00:14:03,727 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_bh_79 [2021-11-21 00:14:03,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_bh_79 [2021-11-21 00:14:03,727 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_held [2021-11-21 00:14:03,728 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_held [2021-11-21 00:14:03,728 INFO L130 BoogieDeclarations]: Found specification of procedure bl_find_get_extent [2021-11-21 00:14:03,728 INFO L138 BoogieDeclarations]: Found implementation of procedure bl_find_get_extent [2021-11-21 00:14:03,728 INFO L130 BoogieDeclarations]: Found specification of procedure bl_free_lseg [2021-11-21 00:14:03,728 INFO L138 BoogieDeclarations]: Found implementation of procedure bl_free_lseg [2021-11-21 00:14:03,728 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-21 00:14:03,728 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-21 00:14:03,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 00:14:03,728 INFO L130 BoogieDeclarations]: Found specification of procedure __rcu_read_unlock [2021-11-21 00:14:03,729 INFO L138 BoogieDeclarations]: Found implementation of procedure __rcu_read_unlock [2021-11-21 00:14:03,729 INFO L130 BoogieDeclarations]: Found specification of procedure nfs4blocklayout_register_sb [2021-11-21 00:14:03,729 INFO L138 BoogieDeclarations]: Found implementation of procedure nfs4blocklayout_register_sb [2021-11-21 00:14:03,729 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-21 00:14:03,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-21 00:14:03,729 INFO L130 BoogieDeclarations]: Found specification of procedure SetPageUptodate [2021-11-21 00:14:03,729 INFO L138 BoogieDeclarations]: Found implementation of procedure SetPageUptodate [2021-11-21 00:14:03,729 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_im_lock_of_pnfs_inval_markings [2021-11-21 00:14:03,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_im_lock_of_pnfs_inval_markings [2021-11-21 00:14:03,730 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_82 [2021-11-21 00:14:03,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_82 [2021-11-21 00:14:03,730 INFO L130 BoogieDeclarations]: Found specification of procedure zero_user_segment [2021-11-21 00:14:03,730 INFO L138 BoogieDeclarations]: Found implementation of procedure zero_user_segment [2021-11-21 00:14:03,730 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_80 [2021-11-21 00:14:03,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_80 [2021-11-21 00:14:03,730 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_EMGentry_exit_nfs4blocklayout_exit_7_2 [2021-11-21 00:14:03,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_EMGentry_exit_nfs4blocklayout_exit_7_2 [2021-11-21 00:14:03,731 INFO L130 BoogieDeclarations]: Found specification of procedure decode_sector_number [2021-11-21 00:14:03,731 INFO L138 BoogieDeclarations]: Found implementation of procedure decode_sector_number [2021-11-21 00:14:03,731 INFO L130 BoogieDeclarations]: Found specification of procedure bl_read_partial_page_sync [2021-11-21 00:14:03,731 INFO L138 BoogieDeclarations]: Found implementation of procedure bl_read_partial_page_sync [2021-11-21 00:14:03,731 INFO L130 BoogieDeclarations]: Found specification of procedure put_parallel [2021-11-21 00:14:03,731 INFO L138 BoogieDeclarations]: Found implementation of procedure put_parallel [2021-11-21 00:14:03,731 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_rcu_suspicious [2021-11-21 00:14:03,731 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_rcu_suspicious [2021-11-21 00:14:03,732 INFO L130 BoogieDeclarations]: Found specification of procedure pnfs_generic_pg_init_read [2021-11-21 00:14:03,732 INFO L138 BoogieDeclarations]: Found implementation of procedure pnfs_generic_pg_init_read [2021-11-21 00:14:03,732 INFO L130 BoogieDeclarations]: Found specification of procedure bl_end_io_write [2021-11-21 00:14:03,732 INFO L138 BoogieDeclarations]: Found implementation of procedure bl_end_io_write [2021-11-21 00:14:03,732 INFO L130 BoogieDeclarations]: Found specification of procedure kref_init [2021-11-21 00:14:03,732 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_init [2021-11-21 00:14:03,732 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab64 [2021-11-21 00:14:03,732 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab64 [2021-11-21 00:14:03,733 INFO L130 BoogieDeclarations]: Found specification of procedure PageUptodate [2021-11-21 00:14:03,733 INFO L138 BoogieDeclarations]: Found implementation of procedure PageUptodate [2021-11-21 00:14:03,733 INFO L130 BoogieDeclarations]: Found specification of procedure bio_add_page [2021-11-21 00:14:03,733 INFO L138 BoogieDeclarations]: Found implementation of procedure bio_add_page [2021-11-21 00:14:03,733 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-11-21 00:14:03,733 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-11-21 00:14:03,733 INFO L130 BoogieDeclarations]: Found specification of procedure release_extents [2021-11-21 00:14:03,733 INFO L138 BoogieDeclarations]: Found implementation of procedure release_extents [2021-11-21 00:14:03,733 INFO L130 BoogieDeclarations]: Found specification of procedure PTR_ERR [2021-11-21 00:14:03,734 INFO L138 BoogieDeclarations]: Found implementation of procedure PTR_ERR [2021-11-21 00:14:03,734 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_lock_acquire [2021-11-21 00:14:03,734 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_lock_acquire [2021-11-21 00:14:03,734 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-21 00:14:03,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-21 00:14:03,734 INFO L130 BoogieDeclarations]: Found specification of procedure bl_do_readpage_sync [2021-11-21 00:14:03,734 INFO L138 BoogieDeclarations]: Found implementation of procedure bl_do_readpage_sync [2021-11-21 00:14:03,734 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_work [2021-11-21 00:14:03,735 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_work [2021-11-21 00:14:03,735 INFO L130 BoogieDeclarations]: Found specification of procedure bl_set_layoutdriver [2021-11-21 00:14:03,735 INFO L138 BoogieDeclarations]: Found implementation of procedure bl_set_layoutdriver [2021-11-21 00:14:03,735 INFO L130 BoogieDeclarations]: Found specification of procedure bl_end_io_write_zero [2021-11-21 00:14:03,735 INFO L138 BoogieDeclarations]: Found implementation of procedure bl_end_io_write_zero [2021-11-21 00:14:03,735 INFO L130 BoogieDeclarations]: Found specification of procedure normalize_up [2021-11-21 00:14:03,735 INFO L138 BoogieDeclarations]: Found implementation of procedure normalize_up [2021-11-21 00:14:03,735 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-11-21 00:14:03,736 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-11-21 00:14:03,736 INFO L130 BoogieDeclarations]: Found specification of procedure __kunmap_atomic [2021-11-21 00:14:03,736 INFO L138 BoogieDeclarations]: Found implementation of procedure __kunmap_atomic [2021-11-21 00:14:03,736 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_unlock [2021-11-21 00:14:03,736 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_unlock [2021-11-21 00:14:03,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:14:03,736 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-21 00:14:03,736 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-21 00:14:03,737 INFO L130 BoogieDeclarations]: Found specification of procedure pnfs_set_lo_fail [2021-11-21 00:14:03,737 INFO L138 BoogieDeclarations]: Found implementation of procedure pnfs_set_lo_fail [2021-11-21 00:14:03,737 INFO L130 BoogieDeclarations]: Found specification of procedure set_to_rw [2021-11-21 00:14:03,737 INFO L138 BoogieDeclarations]: Found implementation of procedure set_to_rw [2021-11-21 00:14:05,056 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:14:05,061 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:14:05,292 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-21 00:14:13,330 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-21 00:14:13,496 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:14:15,773 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:14:15,773 INFO L301 CfgBuilder]: Removed 8 assume(true) statements. [2021-11-21 00:14:15,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:14:15 BoogieIcfgContainer [2021-11-21 00:14:15,782 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:14:15,786 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:14:15,786 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:14:15,790 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:14:15,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:13:55" (1/3) ... [2021-11-21 00:14:15,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@190789ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:14:15, skipping insertion in model container [2021-11-21 00:14:15,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:14:02" (2/3) ... [2021-11-21 00:14:15,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@190789ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:14:15, skipping insertion in model container [2021-11-21 00:14:15,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:14:15" (3/3) ... [2021-11-21 00:14:15,794 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-kernel-locking-spinlock_fs-nfs-blocklayout-blocklayoutdriver.cil.i [2021-11-21 00:14:15,804 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:14:15,805 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-21 00:14:15,891 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:14:15,910 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 00:14:15,912 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-21 00:14:16,003 INFO L276 IsEmpty]: Start isEmpty. Operand has 2392 states, 1371 states have (on average 1.2895696571845368) internal successors, (1768), 1420 states have internal predecessors, (1768), 848 states have call successors, (848), 173 states have call predecessors, (848), 172 states have return successors, (841), 826 states have call predecessors, (841), 841 states have call successors, (841) [2021-11-21 00:14:16,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2021-11-21 00:14:16,042 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:14:16,044 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] [2021-11-21 00:14:16,045 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 00:14:16,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:14:16,051 INFO L85 PathProgramCache]: Analyzing trace with hash 142751763, now seen corresponding path program 1 times [2021-11-21 00:14:16,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:14:16,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948334588] [2021-11-21 00:14:16,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:14:16,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:14:16,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:14:16,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4556 trivial. 0 not checked. [2021-11-21 00:14:16,962 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:14:16,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948334588] [2021-11-21 00:14:16,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948334588] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:14:16,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:14:16,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:14:16,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811108077] [2021-11-21 00:14:16,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:14:16,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:14:16,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:14:17,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:14:17,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:14:17,038 INFO L87 Difference]: Start difference. First operand has 2392 states, 1371 states have (on average 1.2895696571845368) internal successors, (1768), 1420 states have internal predecessors, (1768), 848 states have call successors, (848), 173 states have call predecessors, (848), 172 states have return successors, (841), 826 states have call predecessors, (841), 841 states have call successors, (841) Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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) [2021-11-21 00:14:20,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:14:20,792 INFO L93 Difference]: Finished difference Result 6902 states and 10251 transitions. [2021-11-21 00:14:20,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:14:20,795 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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 365 [2021-11-21 00:14:20,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:14:20,865 INFO L225 Difference]: With dead ends: 6902 [2021-11-21 00:14:20,866 INFO L226 Difference]: Without dead ends: 4568 [2021-11-21 00:14:20,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:14:20,915 INFO L933 BasicCegarLoop]: 3734 mSDtfsCounter, 3196 mSDsluCounter, 3342 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3196 SdHoareTripleChecker+Valid, 6655 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:14:20,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3196 Valid, 6655 Invalid, 916 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [11 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-21 00:14:20,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4568 states. [2021-11-21 00:14:21,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4568 to 4564. [2021-11-21 00:14:21,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4564 states, 2636 states have (on average 1.2830045523520486) internal successors, (3382), 2737 states have internal predecessors, (3382), 1586 states have call successors, (1586), 340 states have call predecessors, (1586), 339 states have return successors, (1582), 1552 states have call predecessors, (1582), 1582 states have call successors, (1582) [2021-11-21 00:14:21,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4564 states to 4564 states and 6550 transitions. [2021-11-21 00:14:21,517 INFO L78 Accepts]: Start accepts. Automaton has 4564 states and 6550 transitions. Word has length 365 [2021-11-21 00:14:21,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:14:21,526 INFO L470 AbstractCegarLoop]: Abstraction has 4564 states and 6550 transitions. [2021-11-21 00:14:21,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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) [2021-11-21 00:14:21,528 INFO L276 IsEmpty]: Start isEmpty. Operand 4564 states and 6550 transitions. [2021-11-21 00:14:21,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2021-11-21 00:14:21,550 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:14:21,551 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, 1, 1, 1, 1, 1, 1] [2021-11-21 00:14:21,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:14:21,552 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 00:14:21,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:14:21,554 INFO L85 PathProgramCache]: Analyzing trace with hash 2049164051, now seen corresponding path program 1 times [2021-11-21 00:14:21,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:14:21,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710030989] [2021-11-21 00:14:21,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:14:21,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:14:21,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:14:22,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4556 trivial. 0 not checked. [2021-11-21 00:14:22,167 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:14:22,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710030989] [2021-11-21 00:14:22,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710030989] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:14:22,168 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:14:22,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:14:22,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713145588] [2021-11-21 00:14:22,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:14:22,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:14:22,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:14:22,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:14:22,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:14:22,173 INFO L87 Difference]: Start difference. First operand 4564 states and 6550 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2021-11-21 00:14:24,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:14:24,718 INFO L93 Difference]: Finished difference Result 11250 states and 16115 transitions. [2021-11-21 00:14:24,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:14:24,719 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) Word has length 378 [2021-11-21 00:14:24,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:14:24,794 INFO L225 Difference]: With dead ends: 11250 [2021-11-21 00:14:24,794 INFO L226 Difference]: Without dead ends: 6755 [2021-11-21 00:14:24,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:14:24,828 INFO L933 BasicCegarLoop]: 3745 mSDtfsCounter, 3186 mSDsluCounter, 3346 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3186 SdHoareTripleChecker+Valid, 6676 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:14:24,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3186 Valid, 6676 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 915 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-21 00:14:24,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6755 states. [2021-11-21 00:14:25,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6755 to 6722. [2021-11-21 00:14:25,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6722 states, 3879 states have (on average 1.2789378705852024) internal successors, (4961), 4029 states have internal predecessors, (4961), 2327 states have call successors, (2327), 514 states have call predecessors, (2327), 513 states have return successors, (2323), 2275 states have call predecessors, (2323), 2323 states have call successors, (2323) [2021-11-21 00:14:25,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6722 states to 6722 states and 9611 transitions. [2021-11-21 00:14:25,580 INFO L78 Accepts]: Start accepts. Automaton has 6722 states and 9611 transitions. Word has length 378 [2021-11-21 00:14:25,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:14:25,583 INFO L470 AbstractCegarLoop]: Abstraction has 6722 states and 9611 transitions. [2021-11-21 00:14:25,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2021-11-21 00:14:25,585 INFO L276 IsEmpty]: Start isEmpty. Operand 6722 states and 9611 transitions. [2021-11-21 00:14:25,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2021-11-21 00:14:25,596 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:14:25,597 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:14:25,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 00:14:25,597 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 00:14:25,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:14:25,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1006261112, now seen corresponding path program 1 times [2021-11-21 00:14:25,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:14:25,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346154368] [2021-11-21 00:14:25,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:14:25,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:14:25,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:14:25,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4556 trivial. 0 not checked. [2021-11-21 00:14:25,964 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:14:25,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346154368] [2021-11-21 00:14:25,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346154368] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:14:25,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:14:25,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:14:25,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266851050] [2021-11-21 00:14:25,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:14:25,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:14:25,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:14:25,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:14:25,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:14:25,971 INFO L87 Difference]: Start difference. First operand 6722 states and 9611 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2021-11-21 00:14:28,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:14:28,978 INFO L93 Difference]: Finished difference Result 14179 states and 20210 transitions. [2021-11-21 00:14:28,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:14:28,978 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) Word has length 379 [2021-11-21 00:14:28,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:14:29,069 INFO L225 Difference]: With dead ends: 14179 [2021-11-21 00:14:29,069 INFO L226 Difference]: Without dead ends: 7526 [2021-11-21 00:14:29,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:14:29,121 INFO L933 BasicCegarLoop]: 4322 mSDtfsCounter, 3166 mSDsluCounter, 3346 mSDsCounter, 0 mSdLazyCounter, 1039 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3166 SdHoareTripleChecker+Valid, 7253 SdHoareTripleChecker+Invalid, 1046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:14:29,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3166 Valid, 7253 Invalid, 1046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1039 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-21 00:14:29,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7526 states. [2021-11-21 00:14:29,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7526 to 7493. [2021-11-21 00:14:29,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7493 states, 4347 states have (on average 1.279043018173453) internal successors, (5560), 4516 states have internal predecessors, (5560), 2542 states have call successors, (2542), 602 states have call predecessors, (2542), 601 states have return successors, (2538), 2479 states have call predecessors, (2538), 2538 states have call successors, (2538) [2021-11-21 00:14:29,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7493 states to 7493 states and 10640 transitions. [2021-11-21 00:14:29,953 INFO L78 Accepts]: Start accepts. Automaton has 7493 states and 10640 transitions. Word has length 379 [2021-11-21 00:14:29,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:14:29,955 INFO L470 AbstractCegarLoop]: Abstraction has 7493 states and 10640 transitions. [2021-11-21 00:14:29,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2021-11-21 00:14:29,955 INFO L276 IsEmpty]: Start isEmpty. Operand 7493 states and 10640 transitions. [2021-11-21 00:14:29,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2021-11-21 00:14:29,970 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:14:29,970 INFO L514 BasicCegarLoop]: trace histogram [37, 34, 34, 34, 34, 34, 34, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:14:29,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 00:14:29,971 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 00:14:29,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:14:29,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1096110886, now seen corresponding path program 1 times [2021-11-21 00:14:29,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:14:29,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159498568] [2021-11-21 00:14:29,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:14:29,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:14:30,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:14:30,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4720 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4720 trivial. 0 not checked. [2021-11-21 00:14:30,580 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:14:30,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159498568] [2021-11-21 00:14:30,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159498568] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:14:30,581 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:14:30,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:14:30,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347204359] [2021-11-21 00:14:30,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:14:30,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:14:30,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:14:30,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:14:30,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:14:30,585 INFO L87 Difference]: Start difference. First operand 7493 states and 10640 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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) [2021-11-21 00:14:33,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:14:33,360 INFO L93 Difference]: Finished difference Result 7499 states and 10645 transitions. [2021-11-21 00:14:33,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:14:33,361 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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 407 [2021-11-21 00:14:33,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:14:33,433 INFO L225 Difference]: With dead ends: 7499 [2021-11-21 00:14:33,434 INFO L226 Difference]: Without dead ends: 7497 [2021-11-21 00:14:33,440 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 [2021-11-21 00:14:33,441 INFO L933 BasicCegarLoop]: 2958 mSDtfsCounter, 3295 mSDsluCounter, 6777 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3312 SdHoareTripleChecker+Valid, 8855 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:14:33,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3312 Valid, 8855 Invalid, 1346 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 1345 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-21 00:14:33,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7497 states. [2021-11-21 00:14:34,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7497 to 7497. [2021-11-21 00:14:34,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7497 states, 4350 states have (on average 1.2788505747126437) internal successors, (5563), 4519 states have internal predecessors, (5563), 2542 states have call successors, (2542), 603 states have call predecessors, (2542), 602 states have return successors, (2538), 2479 states have call predecessors, (2538), 2538 states have call successors, (2538) [2021-11-21 00:14:34,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7497 states to 7497 states and 10643 transitions. [2021-11-21 00:14:34,085 INFO L78 Accepts]: Start accepts. Automaton has 7497 states and 10643 transitions. Word has length 407 [2021-11-21 00:14:34,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:14:34,087 INFO L470 AbstractCegarLoop]: Abstraction has 7497 states and 10643 transitions. [2021-11-21 00:14:34,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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) [2021-11-21 00:14:34,087 INFO L276 IsEmpty]: Start isEmpty. Operand 7497 states and 10643 transitions. [2021-11-21 00:14:34,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2021-11-21 00:14:34,099 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:14:34,100 INFO L514 BasicCegarLoop]: trace histogram [37, 34, 34, 34, 34, 34, 34, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:14:34,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 00:14:34,100 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 00:14:34,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:14:34,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1232310294, now seen corresponding path program 1 times [2021-11-21 00:14:34,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:14:34,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702617685] [2021-11-21 00:14:34,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:14:34,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:14:34,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:14:34,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4722 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4720 trivial. 0 not checked. [2021-11-21 00:14:34,530 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:14:34,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702617685] [2021-11-21 00:14:34,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702617685] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:14:34,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:14:34,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:14:34,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877053359] [2021-11-21 00:14:34,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:14:34,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:14:34,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:14:34,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:14:34,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:14:34,535 INFO L87 Difference]: Start difference. First operand 7497 states and 10643 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 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) [2021-11-21 00:14:37,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:14:37,183 INFO L93 Difference]: Finished difference Result 7503 states and 10648 transitions. [2021-11-21 00:14:37,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:14:37,184 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 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 412 [2021-11-21 00:14:37,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:14:37,278 INFO L225 Difference]: With dead ends: 7503 [2021-11-21 00:14:37,278 INFO L226 Difference]: Without dead ends: 7501 [2021-11-21 00:14:37,285 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 [2021-11-21 00:14:37,286 INFO L933 BasicCegarLoop]: 2961 mSDtfsCounter, 3290 mSDsluCounter, 6777 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3306 SdHoareTripleChecker+Valid, 8858 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:14:37,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3306 Valid, 8858 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1345 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-21 00:14:37,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7501 states. [2021-11-21 00:14:37,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7501 to 7501. [2021-11-21 00:14:37,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7501 states, 4353 states have (on average 1.2786583965081553) internal successors, (5566), 4522 states have internal predecessors, (5566), 2542 states have call successors, (2542), 604 states have call predecessors, (2542), 603 states have return successors, (2538), 2479 states have call predecessors, (2538), 2538 states have call successors, (2538) [2021-11-21 00:14:37,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7501 states to 7501 states and 10646 transitions. [2021-11-21 00:14:37,923 INFO L78 Accepts]: Start accepts. Automaton has 7501 states and 10646 transitions. Word has length 412 [2021-11-21 00:14:37,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:14:37,924 INFO L470 AbstractCegarLoop]: Abstraction has 7501 states and 10646 transitions. [2021-11-21 00:14:37,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 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) [2021-11-21 00:14:37,925 INFO L276 IsEmpty]: Start isEmpty. Operand 7501 states and 10646 transitions. [2021-11-21 00:14:37,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2021-11-21 00:14:37,939 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:14:37,939 INFO L514 BasicCegarLoop]: trace histogram [37, 34, 34, 34, 34, 34, 34, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:14:37,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 00:14:37,940 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 00:14:37,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:14:37,941 INFO L85 PathProgramCache]: Analyzing trace with hash 33146214, now seen corresponding path program 1 times [2021-11-21 00:14:37,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:14:37,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623716927] [2021-11-21 00:14:37,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:14:37,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:14:38,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:14:38,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4728 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4724 trivial. 0 not checked. [2021-11-21 00:14:38,334 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:14:38,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623716927] [2021-11-21 00:14:38,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623716927] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:14:38,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:14:38,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:14:38,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053666593] [2021-11-21 00:14:38,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:14:38,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:14:38,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:14:38,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:14:38,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:14:38,338 INFO L87 Difference]: Start difference. First operand 7501 states and 10646 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 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) [2021-11-21 00:14:40,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:14:40,996 INFO L93 Difference]: Finished difference Result 7507 states and 10651 transitions. [2021-11-21 00:14:40,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:14:40,997 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 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) Word has length 417 [2021-11-21 00:14:40,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:14:41,043 INFO L225 Difference]: With dead ends: 7507 [2021-11-21 00:14:41,043 INFO L226 Difference]: Without dead ends: 7505 [2021-11-21 00:14:41,049 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 [2021-11-21 00:14:41,050 INFO L933 BasicCegarLoop]: 2961 mSDtfsCounter, 3290 mSDsluCounter, 6777 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3305 SdHoareTripleChecker+Valid, 8858 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:14:41,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3305 Valid, 8858 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1345 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-21 00:14:41,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7505 states. [2021-11-21 00:14:41,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7505 to 7505. [2021-11-21 00:14:41,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7505 states, 4356 states have (on average 1.2784664830119377) internal successors, (5569), 4525 states have internal predecessors, (5569), 2542 states have call successors, (2542), 605 states have call predecessors, (2542), 604 states have return successors, (2538), 2479 states have call predecessors, (2538), 2538 states have call successors, (2538) [2021-11-21 00:14:41,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7505 states to 7505 states and 10649 transitions. [2021-11-21 00:14:41,730 INFO L78 Accepts]: Start accepts. Automaton has 7505 states and 10649 transitions. Word has length 417 [2021-11-21 00:14:41,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:14:41,731 INFO L470 AbstractCegarLoop]: Abstraction has 7505 states and 10649 transitions. [2021-11-21 00:14:41,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 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) [2021-11-21 00:14:41,732 INFO L276 IsEmpty]: Start isEmpty. Operand 7505 states and 10649 transitions. [2021-11-21 00:14:41,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2021-11-21 00:14:41,746 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:14:41,746 INFO L514 BasicCegarLoop]: trace histogram [37, 34, 34, 34, 34, 34, 34, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:14:41,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 00:14:41,747 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 00:14:41,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:14:41,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1303407318, now seen corresponding path program 1 times [2021-11-21 00:14:41,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:14:41,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223601359] [2021-11-21 00:14:41,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:14:41,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:14:41,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:14:42,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4738 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4732 trivial. 0 not checked. [2021-11-21 00:14:42,143 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:14:42,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223601359] [2021-11-21 00:14:42,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223601359] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:14:42,143 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:14:42,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:14:42,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417361951] [2021-11-21 00:14:42,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:14:42,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:14:42,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:14:42,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:14:42,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:14:42,146 INFO L87 Difference]: Start difference. First operand 7505 states and 10649 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (47), 3 states have call predecessors, (47), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) [2021-11-21 00:14:46,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:14:46,304 INFO L93 Difference]: Finished difference Result 9327 states and 13140 transitions. [2021-11-21 00:14:46,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:14:46,304 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (47), 3 states have call predecessors, (47), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) Word has length 422 [2021-11-21 00:14:46,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:14:46,365 INFO L225 Difference]: With dead ends: 9327 [2021-11-21 00:14:46,366 INFO L226 Difference]: Without dead ends: 9325 [2021-11-21 00:14:46,373 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 [2021-11-21 00:14:46,374 INFO L933 BasicCegarLoop]: 3482 mSDtfsCounter, 3128 mSDsluCounter, 8919 mSDsCounter, 0 mSdLazyCounter, 1642 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3142 SdHoareTripleChecker+Valid, 11281 SdHoareTripleChecker+Invalid, 1644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:14:46,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3142 Valid, 11281 Invalid, 1644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1642 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-11-21 00:14:46,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9325 states. [2021-11-21 00:14:47,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9325 to 9315. [2021-11-21 00:14:47,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9315 states, 5328 states have (on average 1.2727102102102101) internal successors, (6781), 5581 states have internal predecessors, (6781), 3133 states have call successors, (3133), 867 states have call predecessors, (3133), 851 states have return successors, (3216), 3004 states have call predecessors, (3216), 3129 states have call successors, (3216) [2021-11-21 00:14:47,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9315 states to 9315 states and 13130 transitions. [2021-11-21 00:14:47,282 INFO L78 Accepts]: Start accepts. Automaton has 9315 states and 13130 transitions. Word has length 422 [2021-11-21 00:14:47,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:14:47,283 INFO L470 AbstractCegarLoop]: Abstraction has 9315 states and 13130 transitions. [2021-11-21 00:14:47,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (47), 3 states have call predecessors, (47), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) [2021-11-21 00:14:47,284 INFO L276 IsEmpty]: Start isEmpty. Operand 9315 states and 13130 transitions. [2021-11-21 00:14:47,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2021-11-21 00:14:47,295 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:14:47,296 INFO L514 BasicCegarLoop]: trace histogram [37, 34, 34, 34, 34, 34, 34, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:14:47,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 00:14:47,296 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 00:14:47,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:14:47,298 INFO L85 PathProgramCache]: Analyzing trace with hash 2027296678, now seen corresponding path program 1 times [2021-11-21 00:14:47,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:14:47,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165976197] [2021-11-21 00:14:47,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:14:47,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:14:47,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:14:47,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4752 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4744 trivial. 0 not checked. [2021-11-21 00:14:47,738 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:14:47,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165976197] [2021-11-21 00:14:47,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165976197] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:14:47,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:14:47,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:14:47,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005641377] [2021-11-21 00:14:47,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:14:47,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:14:47,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:14:47,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:14:47,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:14:47,742 INFO L87 Difference]: Start difference. First operand 9315 states and 13130 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (48), 3 states have call predecessors, (48), 1 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) [2021-11-21 00:14:50,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:14:50,280 INFO L93 Difference]: Finished difference Result 9368 states and 13172 transitions. [2021-11-21 00:14:50,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:14:50,281 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (48), 3 states have call predecessors, (48), 1 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) Word has length 427 [2021-11-21 00:14:50,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:14:50,337 INFO L225 Difference]: With dead ends: 9368 [2021-11-21 00:14:50,338 INFO L226 Difference]: Without dead ends: 9366 [2021-11-21 00:14:50,345 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 [2021-11-21 00:14:50,346 INFO L933 BasicCegarLoop]: 2964 mSDtfsCounter, 3269 mSDsluCounter, 6817 mSDsCounter, 0 mSdLazyCounter, 1354 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3282 SdHoareTripleChecker+Valid, 8894 SdHoareTripleChecker+Invalid, 1356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:14:50,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3282 Valid, 8894 Invalid, 1356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1354 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-21 00:14:50,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9366 states. [2021-11-21 00:14:50,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9366 to 9364. [2021-11-21 00:14:51,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9364 states, 5358 states have (on average 1.2717431877566256) internal successors, (6814), 5611 states have internal predecessors, (6814), 3136 states have call successors, (3136), 883 states have call predecessors, (3136), 867 states have return successors, (3219), 3007 states have call predecessors, (3219), 3132 states have call successors, (3219) [2021-11-21 00:14:51,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9364 states to 9364 states and 13169 transitions. [2021-11-21 00:14:51,062 INFO L78 Accepts]: Start accepts. Automaton has 9364 states and 13169 transitions. Word has length 427 [2021-11-21 00:14:51,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:14:51,063 INFO L470 AbstractCegarLoop]: Abstraction has 9364 states and 13169 transitions. [2021-11-21 00:14:51,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (48), 3 states have call predecessors, (48), 1 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) [2021-11-21 00:14:51,064 INFO L276 IsEmpty]: Start isEmpty. Operand 9364 states and 13169 transitions. [2021-11-21 00:14:51,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2021-11-21 00:14:51,074 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:14:51,076 INFO L514 BasicCegarLoop]: trace histogram [37, 34, 34, 34, 34, 34, 34, 6, 5, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:14:51,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 00:14:51,076 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 00:14:51,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:14:51,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1877651825, now seen corresponding path program 1 times [2021-11-21 00:14:51,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:14:51,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923224147] [2021-11-21 00:14:51,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:14:51,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:14:51,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:14:51,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4772 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4762 trivial. 0 not checked. [2021-11-21 00:14:51,571 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:14:51,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923224147] [2021-11-21 00:14:51,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923224147] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:14:51,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:14:51,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:14:51,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540856148] [2021-11-21 00:14:51,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:14:51,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:14:51,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:14:51,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:14:51,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:14:51,575 INFO L87 Difference]: Start difference. First operand 9364 states and 13169 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (55), 3 states have call predecessors, (55), 1 states have return successors, (53), 2 states have call predecessors, (53), 2 states have call successors, (53) [2021-11-21 00:14:54,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:14:54,542 INFO L93 Difference]: Finished difference Result 9370 states and 13174 transitions. [2021-11-21 00:14:54,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:14:54,542 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (55), 3 states have call predecessors, (55), 1 states have return successors, (53), 2 states have call predecessors, (53), 2 states have call successors, (53) Word has length 446 [2021-11-21 00:14:54,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:14:54,596 INFO L225 Difference]: With dead ends: 9370 [2021-11-21 00:14:54,596 INFO L226 Difference]: Without dead ends: 9368 [2021-11-21 00:14:54,604 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 [2021-11-21 00:14:54,605 INFO L933 BasicCegarLoop]: 2961 mSDtfsCounter, 3289 mSDsluCounter, 6777 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3301 SdHoareTripleChecker+Valid, 8858 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:14:54,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3301 Valid, 8858 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1345 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-21 00:14:54,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9368 states. [2021-11-21 00:14:55,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9368 to 9368. [2021-11-21 00:14:55,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9368 states, 5361 states have (on average 1.271591121059504) internal successors, (6817), 5614 states have internal predecessors, (6817), 3136 states have call successors, (3136), 884 states have call predecessors, (3136), 868 states have return successors, (3219), 3007 states have call predecessors, (3219), 3132 states have call successors, (3219) [2021-11-21 00:14:55,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9368 states to 9368 states and 13172 transitions. [2021-11-21 00:14:55,342 INFO L78 Accepts]: Start accepts. Automaton has 9368 states and 13172 transitions. Word has length 446 [2021-11-21 00:14:55,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:14:55,343 INFO L470 AbstractCegarLoop]: Abstraction has 9368 states and 13172 transitions. [2021-11-21 00:14:55,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (55), 3 states have call predecessors, (55), 1 states have return successors, (53), 2 states have call predecessors, (53), 2 states have call successors, (53) [2021-11-21 00:14:55,344 INFO L276 IsEmpty]: Start isEmpty. Operand 9368 states and 13172 transitions. [2021-11-21 00:14:55,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2021-11-21 00:14:55,356 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:14:55,357 INFO L514 BasicCegarLoop]: trace histogram [37, 34, 34, 34, 34, 34, 34, 7, 6, 6, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:14:55,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-21 00:14:55,357 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 00:14:55,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:14:55,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1160691519, now seen corresponding path program 1 times [2021-11-21 00:14:55,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:14:55,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192740677] [2021-11-21 00:14:55,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:14:55,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:14:55,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:14:55,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4794 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4782 trivial. 0 not checked. [2021-11-21 00:14:55,737 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:14:55,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192740677] [2021-11-21 00:14:55,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192740677] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:14:55,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:14:55,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:14:55,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983693539] [2021-11-21 00:14:55,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:14:55,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:14:55,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:14:55,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:14:55,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:14:55,740 INFO L87 Difference]: Start difference. First operand 9368 states and 13172 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (56), 3 states have call predecessors, (56), 1 states have return successors, (54), 2 states have call predecessors, (54), 2 states have call successors, (54) [2021-11-21 00:14:58,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:14:58,788 INFO L93 Difference]: Finished difference Result 9374 states and 13177 transitions. [2021-11-21 00:14:58,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:14:58,789 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (56), 3 states have call predecessors, (56), 1 states have return successors, (54), 2 states have call predecessors, (54), 2 states have call successors, (54) Word has length 451 [2021-11-21 00:14:58,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:14:58,838 INFO L225 Difference]: With dead ends: 9374 [2021-11-21 00:14:58,838 INFO L226 Difference]: Without dead ends: 9372 [2021-11-21 00:14:58,844 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 [2021-11-21 00:14:58,845 INFO L933 BasicCegarLoop]: 2961 mSDtfsCounter, 3289 mSDsluCounter, 6777 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3300 SdHoareTripleChecker+Valid, 8858 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:14:58,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3300 Valid, 8858 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1345 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-21 00:14:58,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9372 states. [2021-11-21 00:14:59,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9372 to 9372. [2021-11-21 00:14:59,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9372 states, 5364 states have (on average 1.2714392244593586) internal successors, (6820), 5617 states have internal predecessors, (6820), 3136 states have call successors, (3136), 885 states have call predecessors, (3136), 869 states have return successors, (3219), 3007 states have call predecessors, (3219), 3132 states have call successors, (3219) [2021-11-21 00:14:59,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9372 states to 9372 states and 13175 transitions. [2021-11-21 00:14:59,448 INFO L78 Accepts]: Start accepts. Automaton has 9372 states and 13175 transitions. Word has length 451 [2021-11-21 00:14:59,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:14:59,449 INFO L470 AbstractCegarLoop]: Abstraction has 9372 states and 13175 transitions. [2021-11-21 00:14:59,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (56), 3 states have call predecessors, (56), 1 states have return successors, (54), 2 states have call predecessors, (54), 2 states have call successors, (54) [2021-11-21 00:14:59,450 INFO L276 IsEmpty]: Start isEmpty. Operand 9372 states and 13175 transitions. [2021-11-21 00:14:59,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2021-11-21 00:14:59,460 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:14:59,460 INFO L514 BasicCegarLoop]: trace histogram [38, 34, 34, 34, 34, 34, 34, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:14:59,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-21 00:14:59,461 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 00:14:59,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:14:59,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1089924736, now seen corresponding path program 1 times [2021-11-21 00:14:59,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:14:59,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50746015] [2021-11-21 00:14:59,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:14:59,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:14:59,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:14:59,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4800 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4793 trivial. 0 not checked. [2021-11-21 00:14:59,673 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:14:59,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50746015] [2021-11-21 00:14:59,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50746015] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:14:59,674 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:14:59,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:14:59,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685987702] [2021-11-21 00:14:59,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:14:59,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:14:59,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:14:59,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:14:59,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:14:59,676 INFO L87 Difference]: Start difference. First operand 9372 states and 13175 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (49), 2 states have call predecessors, (49), 1 states have return successors, (45), 3 states have call predecessors, (45), 3 states have call successors, (45) [2021-11-21 00:15:01,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:15:01,871 INFO L93 Difference]: Finished difference Result 21643 states and 30421 transitions. [2021-11-21 00:15:01,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:15:01,872 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (49), 2 states have call predecessors, (49), 1 states have return successors, (45), 3 states have call predecessors, (45), 3 states have call successors, (45) Word has length 439 [2021-11-21 00:15:01,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:15:01,934 INFO L225 Difference]: With dead ends: 21643 [2021-11-21 00:15:01,935 INFO L226 Difference]: Without dead ends: 12642 [2021-11-21 00:15:01,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:15:01,980 INFO L933 BasicCegarLoop]: 4075 mSDtfsCounter, 3166 mSDsluCounter, 3344 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3166 SdHoareTripleChecker+Valid, 7004 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:15:01,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3166 Valid, 7004 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 996 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-21 00:15:01,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12642 states. [2021-11-21 00:15:02,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12642 to 12581. [2021-11-21 00:15:02,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12581 states, 7202 states have (on average 1.272007775617884) internal successors, (9161), 7544 states have internal predecessors, (9161), 4201 states have call successors, (4201), 1196 states have call predecessors, (4201), 1175 states have return successors, (4313), 4025 states have call predecessors, (4313), 4197 states have call successors, (4313) [2021-11-21 00:15:02,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12581 states to 12581 states and 17675 transitions. [2021-11-21 00:15:02,776 INFO L78 Accepts]: Start accepts. Automaton has 12581 states and 17675 transitions. Word has length 439 [2021-11-21 00:15:02,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:15:02,777 INFO L470 AbstractCegarLoop]: Abstraction has 12581 states and 17675 transitions. [2021-11-21 00:15:02,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (49), 2 states have call predecessors, (49), 1 states have return successors, (45), 3 states have call predecessors, (45), 3 states have call successors, (45) [2021-11-21 00:15:02,777 INFO L276 IsEmpty]: Start isEmpty. Operand 12581 states and 17675 transitions. [2021-11-21 00:15:02,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2021-11-21 00:15:02,786 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:15:02,787 INFO L514 BasicCegarLoop]: trace histogram [38, 34, 34, 34, 34, 34, 34, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:15:02,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-21 00:15:02,787 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 00:15:02,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:15:02,787 INFO L85 PathProgramCache]: Analyzing trace with hash -377069029, now seen corresponding path program 1 times [2021-11-21 00:15:02,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:15:02,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793084413] [2021-11-21 00:15:02,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:15:02,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:15:02,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:15:02,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4800 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4793 trivial. 0 not checked. [2021-11-21 00:15:02,994 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:15:02,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793084413] [2021-11-21 00:15:02,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793084413] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:15:02,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:15:02,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:15:02,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592713978] [2021-11-21 00:15:02,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:15:02,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:15:02,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:15:02,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:15:02,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:15:02,997 INFO L87 Difference]: Start difference. First operand 12581 states and 17675 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 3 states have call successors, (49), 2 states have call predecessors, (49), 1 states have return successors, (45), 3 states have call predecessors, (45), 3 states have call successors, (45) [2021-11-21 00:15:06,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:15:06,366 INFO L93 Difference]: Finished difference Result 28462 states and 39964 transitions. [2021-11-21 00:15:06,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:15:06,366 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 3 states have call successors, (49), 2 states have call predecessors, (49), 1 states have return successors, (45), 3 states have call predecessors, (45), 3 states have call successors, (45) Word has length 438 [2021-11-21 00:15:06,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:15:06,445 INFO L225 Difference]: With dead ends: 28462 [2021-11-21 00:15:06,445 INFO L226 Difference]: Without dead ends: 16252 [2021-11-21 00:15:06,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:15:06,499 INFO L933 BasicCegarLoop]: 5645 mSDtfsCounter, 3186 mSDsluCounter, 3344 mSDsCounter, 0 mSdLazyCounter, 1278 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3186 SdHoareTripleChecker+Valid, 8574 SdHoareTripleChecker+Invalid, 1282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:15:06,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3186 Valid, 8574 Invalid, 1282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1278 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-21 00:15:06,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16252 states. [2021-11-21 00:15:07,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16252 to 16191. [2021-11-21 00:15:07,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16191 states, 9285 states have (on average 1.272697899838449) internal successors, (11817), 9724 states have internal predecessors, (11817), 5378 states have call successors, (5378), 1551 states have call predecessors, (5378), 1525 states have return successors, (5519), 5151 states have call predecessors, (5519), 5374 states have call successors, (5519) [2021-11-21 00:15:07,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16191 states to 16191 states and 22714 transitions. [2021-11-21 00:15:07,516 INFO L78 Accepts]: Start accepts. Automaton has 16191 states and 22714 transitions. Word has length 438 [2021-11-21 00:15:07,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:15:07,517 INFO L470 AbstractCegarLoop]: Abstraction has 16191 states and 22714 transitions. [2021-11-21 00:15:07,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 3 states have call successors, (49), 2 states have call predecessors, (49), 1 states have return successors, (45), 3 states have call predecessors, (45), 3 states have call successors, (45) [2021-11-21 00:15:07,517 INFO L276 IsEmpty]: Start isEmpty. Operand 16191 states and 22714 transitions. [2021-11-21 00:15:07,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2021-11-21 00:15:07,528 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:15:07,529 INFO L514 BasicCegarLoop]: trace histogram [37, 34, 34, 34, 34, 34, 34, 8, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:15:07,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-21 00:15:07,529 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 00:15:07,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:15:07,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1458685455, now seen corresponding path program 1 times [2021-11-21 00:15:07,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:15:07,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961122544] [2021-11-21 00:15:07,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:15:07,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:15:07,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:15:07,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4820 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 4806 trivial. 0 not checked. [2021-11-21 00:15:07,953 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:15:07,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961122544] [2021-11-21 00:15:07,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961122544] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:15:07,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:15:07,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:15:07,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374123069] [2021-11-21 00:15:07,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:15:07,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:15:07,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:15:07,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:15:07,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:15:07,956 INFO L87 Difference]: Start difference. First operand 16191 states and 22714 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (57), 3 states have call predecessors, (57), 1 states have return successors, (55), 2 states have call predecessors, (55), 2 states have call successors, (55) [2021-11-21 00:15:09,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:15:09,739 INFO L93 Difference]: Finished difference Result 16389 states and 22850 transitions. [2021-11-21 00:15:09,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:15:09,740 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (57), 3 states have call predecessors, (57), 1 states have return successors, (55), 2 states have call predecessors, (55), 2 states have call successors, (55) Word has length 456 [2021-11-21 00:15:09,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:15:09,812 INFO L225 Difference]: With dead ends: 16389 [2021-11-21 00:15:09,813 INFO L226 Difference]: Without dead ends: 16387 [2021-11-21 00:15:09,825 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 [2021-11-21 00:15:09,825 INFO L933 BasicCegarLoop]: 2962 mSDtfsCounter, 3156 mSDsluCounter, 6932 mSDsCounter, 0 mSdLazyCounter, 1376 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3166 SdHoareTripleChecker+Valid, 8985 SdHoareTripleChecker+Invalid, 1378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:15:09,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3166 Valid, 8985 Invalid, 1378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1376 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-21 00:15:09,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16387 states. [2021-11-21 00:15:10,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16387 to 16385. [2021-11-21 00:15:10,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16385 states, 9398 states have (on average 1.2704830815067036) internal successors, (11940), 9837 states have internal predecessors, (11940), 5383 states have call successors, (5383), 1627 states have call predecessors, (5383), 1601 states have return successors, (5524), 5156 states have call predecessors, (5524), 5379 states have call successors, (5524) [2021-11-21 00:15:10,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16385 states to 16385 states and 22847 transitions. [2021-11-21 00:15:10,826 INFO L78 Accepts]: Start accepts. Automaton has 16385 states and 22847 transitions. Word has length 456 [2021-11-21 00:15:10,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:15:10,828 INFO L470 AbstractCegarLoop]: Abstraction has 16385 states and 22847 transitions. [2021-11-21 00:15:10,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (57), 3 states have call predecessors, (57), 1 states have return successors, (55), 2 states have call predecessors, (55), 2 states have call successors, (55) [2021-11-21 00:15:10,828 INFO L276 IsEmpty]: Start isEmpty. Operand 16385 states and 22847 transitions. [2021-11-21 00:15:10,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2021-11-21 00:15:10,840 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:15:10,840 INFO L514 BasicCegarLoop]: trace histogram [37, 34, 34, 34, 34, 34, 34, 9, 8, 8, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:15:10,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-21 00:15:10,841 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 00:15:10,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:15:10,842 INFO L85 PathProgramCache]: Analyzing trace with hash 933672511, now seen corresponding path program 1 times [2021-11-21 00:15:10,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:15:10,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475034852] [2021-11-21 00:15:10,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:15:10,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:15:10,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:15:11,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4850 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 4834 trivial. 0 not checked. [2021-11-21 00:15:11,126 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:15:11,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475034852] [2021-11-21 00:15:11,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475034852] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:15:11,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:15:11,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:15:11,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723478241] [2021-11-21 00:15:11,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:15:11,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:15:11,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:15:11,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:15:11,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:15:11,129 INFO L87 Difference]: Start difference. First operand 16385 states and 22847 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (58), 3 states have call predecessors, (58), 1 states have return successors, (56), 2 states have call predecessors, (56), 2 states have call successors, (56) [2021-11-21 00:15:13,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:15:13,197 INFO L93 Difference]: Finished difference Result 16391 states and 22852 transitions. [2021-11-21 00:15:13,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:15:13,206 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (58), 3 states have call predecessors, (58), 1 states have return successors, (56), 2 states have call predecessors, (56), 2 states have call successors, (56) Word has length 461 [2021-11-21 00:15:13,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:15:13,264 INFO L225 Difference]: With dead ends: 16391 [2021-11-21 00:15:13,264 INFO L226 Difference]: Without dead ends: 16389 [2021-11-21 00:15:13,273 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 [2021-11-21 00:15:13,274 INFO L933 BasicCegarLoop]: 2961 mSDtfsCounter, 3289 mSDsluCounter, 6777 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3298 SdHoareTripleChecker+Valid, 8858 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:15:13,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3298 Valid, 8858 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1345 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-21 00:15:13,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16389 states. [2021-11-21 00:15:14,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16389 to 16389. [2021-11-21 00:15:14,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16389 states, 9401 states have (on average 1.2703967663014573) internal successors, (11943), 9840 states have internal predecessors, (11943), 5383 states have call successors, (5383), 1628 states have call predecessors, (5383), 1602 states have return successors, (5524), 5156 states have call predecessors, (5524), 5379 states have call successors, (5524) [2021-11-21 00:15:14,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16389 states to 16389 states and 22850 transitions. [2021-11-21 00:15:14,344 INFO L78 Accepts]: Start accepts. Automaton has 16389 states and 22850 transitions. Word has length 461 [2021-11-21 00:15:14,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:15:14,346 INFO L470 AbstractCegarLoop]: Abstraction has 16389 states and 22850 transitions. [2021-11-21 00:15:14,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (58), 3 states have call predecessors, (58), 1 states have return successors, (56), 2 states have call predecessors, (56), 2 states have call successors, (56) [2021-11-21 00:15:14,347 INFO L276 IsEmpty]: Start isEmpty. Operand 16389 states and 22850 transitions. [2021-11-21 00:15:14,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2021-11-21 00:15:14,361 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:15:14,362 INFO L514 BasicCegarLoop]: trace histogram [37, 34, 34, 34, 34, 34, 34, 10, 9, 9, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:15:14,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-21 00:15:14,362 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 00:15:14,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:15:14,363 INFO L85 PathProgramCache]: Analyzing trace with hash 640864881, now seen corresponding path program 1 times [2021-11-21 00:15:14,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:15:14,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511822165] [2021-11-21 00:15:14,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:15:14,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:15:14,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:15:14,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4884 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4866 trivial. 0 not checked. [2021-11-21 00:15:14,667 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:15:14,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511822165] [2021-11-21 00:15:14,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511822165] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:15:14,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:15:14,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:15:14,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653594826] [2021-11-21 00:15:14,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:15:14,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:15:14,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:15:14,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:15:14,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:15:14,670 INFO L87 Difference]: Start difference. First operand 16389 states and 22850 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (59), 3 states have call predecessors, (59), 1 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) [2021-11-21 00:15:16,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:15:16,771 INFO L93 Difference]: Finished difference Result 16395 states and 22855 transitions. [2021-11-21 00:15:16,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:15:16,771 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (59), 3 states have call predecessors, (59), 1 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) Word has length 466 [2021-11-21 00:15:16,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:15:16,833 INFO L225 Difference]: With dead ends: 16395 [2021-11-21 00:15:16,833 INFO L226 Difference]: Without dead ends: 16393 [2021-11-21 00:15:16,840 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 [2021-11-21 00:15:16,841 INFO L933 BasicCegarLoop]: 2961 mSDtfsCounter, 3289 mSDsluCounter, 6777 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3297 SdHoareTripleChecker+Valid, 8858 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:15:16,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3297 Valid, 8858 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1345 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-21 00:15:16,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16393 states. [2021-11-21 00:15:17,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16393 to 16393. [2021-11-21 00:15:17,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16393 states, 9404 states have (on average 1.2703105061675883) internal successors, (11946), 9843 states have internal predecessors, (11946), 5383 states have call successors, (5383), 1629 states have call predecessors, (5383), 1603 states have return successors, (5524), 5156 states have call predecessors, (5524), 5379 states have call successors, (5524) [2021-11-21 00:15:17,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16393 states to 16393 states and 22853 transitions. [2021-11-21 00:15:17,792 INFO L78 Accepts]: Start accepts. Automaton has 16393 states and 22853 transitions. Word has length 466 [2021-11-21 00:15:17,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:15:17,794 INFO L470 AbstractCegarLoop]: Abstraction has 16393 states and 22853 transitions. [2021-11-21 00:15:17,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (59), 3 states have call predecessors, (59), 1 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) [2021-11-21 00:15:17,794 INFO L276 IsEmpty]: Start isEmpty. Operand 16393 states and 22853 transitions. [2021-11-21 00:15:17,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2021-11-21 00:15:17,809 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:15:17,810 INFO L514 BasicCegarLoop]: trace histogram [37, 34, 34, 34, 34, 34, 34, 11, 10, 10, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:15:17,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-21 00:15:17,810 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 00:15:17,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:15:17,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1924510106, now seen corresponding path program 1 times [2021-11-21 00:15:17,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:15:17,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169735617] [2021-11-21 00:15:17,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:15:17,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:15:17,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:15:18,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4920 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 4900 trivial. 0 not checked. [2021-11-21 00:15:18,085 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:15:18,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169735617] [2021-11-21 00:15:18,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169735617] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:15:18,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:15:18,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:15:18,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702517519] [2021-11-21 00:15:18,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:15:18,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:15:18,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:15:18,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:15:18,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:15:18,090 INFO L87 Difference]: Start difference. First operand 16393 states and 22853 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (54), 3 states have call predecessors, (54), 1 states have return successors, (52), 2 states have call predecessors, (52), 2 states have call successors, (52) [2021-11-21 00:15:21,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:15:21,098 INFO L93 Difference]: Finished difference Result 16399 states and 22858 transitions. [2021-11-21 00:15:21,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:15:21,099 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (54), 3 states have call predecessors, (54), 1 states have return successors, (52), 2 states have call predecessors, (52), 2 states have call successors, (52) Word has length 457 [2021-11-21 00:15:21,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:15:21,146 INFO L225 Difference]: With dead ends: 16399 [2021-11-21 00:15:21,147 INFO L226 Difference]: Without dead ends: 16397 [2021-11-21 00:15:21,153 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 [2021-11-21 00:15:21,154 INFO L933 BasicCegarLoop]: 2961 mSDtfsCounter, 3290 mSDsluCounter, 6777 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3297 SdHoareTripleChecker+Valid, 8858 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:15:21,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3297 Valid, 8858 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1345 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-21 00:15:21,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16397 states. [2021-11-21 00:15:21,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16397 to 16397. [2021-11-21 00:15:21,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16397 states, 9407 states have (on average 1.2702243010524077) internal successors, (11949), 9846 states have internal predecessors, (11949), 5383 states have call successors, (5383), 1630 states have call predecessors, (5383), 1604 states have return successors, (5524), 5156 states have call predecessors, (5524), 5379 states have call successors, (5524) [2021-11-21 00:15:21,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16397 states to 16397 states and 22856 transitions. [2021-11-21 00:15:21,945 INFO L78 Accepts]: Start accepts. Automaton has 16397 states and 22856 transitions. Word has length 457 [2021-11-21 00:15:21,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:15:21,947 INFO L470 AbstractCegarLoop]: Abstraction has 16397 states and 22856 transitions. [2021-11-21 00:15:21,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (54), 3 states have call predecessors, (54), 1 states have return successors, (52), 2 states have call predecessors, (52), 2 states have call successors, (52) [2021-11-21 00:15:21,947 INFO L276 IsEmpty]: Start isEmpty. Operand 16397 states and 22856 transitions. [2021-11-21 00:15:21,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2021-11-21 00:15:21,962 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:15:21,963 INFO L514 BasicCegarLoop]: trace histogram [40, 34, 34, 34, 34, 34, 34, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:15:21,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-21 00:15:21,963 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 00:15:21,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:15:21,964 INFO L85 PathProgramCache]: Analyzing trace with hash 156300879, now seen corresponding path program 1 times [2021-11-21 00:15:21,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:15:21,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883515449] [2021-11-21 00:15:21,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:15:21,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:15:22,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:15:22,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4970 trivial. 0 not checked. [2021-11-21 00:15:22,292 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:15:22,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883515449] [2021-11-21 00:15:22,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883515449] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:15:22,292 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:15:22,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:15:22,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951601675] [2021-11-21 00:15:22,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:15:22,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:15:22,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:15:22,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:15:22,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:15:22,295 INFO L87 Difference]: Start difference. First operand 16397 states and 22856 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (49), 3 states have call predecessors, (49), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) [2021-11-21 00:15:24,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:15:24,972 INFO L93 Difference]: Finished difference Result 16433 states and 22889 transitions. [2021-11-21 00:15:24,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:15:24,973 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (49), 3 states have call predecessors, (49), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) Word has length 455 [2021-11-21 00:15:24,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:15:25,023 INFO L225 Difference]: With dead ends: 16433 [2021-11-21 00:15:25,023 INFO L226 Difference]: Without dead ends: 16431 [2021-11-21 00:15:25,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:15:25,032 INFO L933 BasicCegarLoop]: 3482 mSDtfsCounter, 3119 mSDsluCounter, 8942 mSDsCounter, 0 mSdLazyCounter, 1631 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3122 SdHoareTripleChecker+Valid, 11302 SdHoareTripleChecker+Invalid, 1634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:15:25,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3122 Valid, 11302 Invalid, 1634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1631 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-21 00:15:25,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16431 states. [2021-11-21 00:15:25,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16431 to 16417. [2021-11-21 00:15:25,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16417 states, 9422 states have (on average 1.2697940989174272) internal successors, (11964), 9861 states have internal predecessors, (11964), 5383 states have call successors, (5383), 1635 states have call predecessors, (5383), 1609 states have return successors, (5524), 5156 states have call predecessors, (5524), 5379 states have call successors, (5524) [2021-11-21 00:15:25,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16417 states to 16417 states and 22871 transitions. [2021-11-21 00:15:25,846 INFO L78 Accepts]: Start accepts. Automaton has 16417 states and 22871 transitions. Word has length 455 [2021-11-21 00:15:25,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:15:25,847 INFO L470 AbstractCegarLoop]: Abstraction has 16417 states and 22871 transitions. [2021-11-21 00:15:25,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (49), 3 states have call predecessors, (49), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) [2021-11-21 00:15:25,847 INFO L276 IsEmpty]: Start isEmpty. Operand 16417 states and 22871 transitions. [2021-11-21 00:15:25,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2021-11-21 00:15:25,862 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:15:25,863 INFO L514 BasicCegarLoop]: trace histogram [37, 34, 34, 34, 34, 34, 34, 12, 11, 11, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:15:25,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-21 00:15:25,863 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 00:15:25,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:15:25,864 INFO L85 PathProgramCache]: Analyzing trace with hash -2116720086, now seen corresponding path program 1 times [2021-11-21 00:15:25,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:15:25,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738984367] [2021-11-21 00:15:25,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:15:25,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:15:25,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:15:26,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4962 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 4940 trivial. 0 not checked. [2021-11-21 00:15:26,240 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:15:26,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738984367] [2021-11-21 00:15:26,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738984367] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:15:26,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:15:26,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:15:26,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186119933] [2021-11-21 00:15:26,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:15:26,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:15:26,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:15:26,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:15:26,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:15:26,242 INFO L87 Difference]: Start difference. First operand 16417 states and 22871 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (55), 3 states have call predecessors, (55), 1 states have return successors, (53), 2 states have call predecessors, (53), 2 states have call successors, (53) [2021-11-21 00:15:28,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:15:28,368 INFO L93 Difference]: Finished difference Result 16423 states and 22876 transitions. [2021-11-21 00:15:28,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:15:28,368 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (55), 3 states have call predecessors, (55), 1 states have return successors, (53), 2 states have call predecessors, (53), 2 states have call successors, (53) Word has length 462 [2021-11-21 00:15:28,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:15:28,419 INFO L225 Difference]: With dead ends: 16423 [2021-11-21 00:15:28,420 INFO L226 Difference]: Without dead ends: 16421 [2021-11-21 00:15:28,428 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 [2021-11-21 00:15:28,429 INFO L933 BasicCegarLoop]: 2961 mSDtfsCounter, 3290 mSDsluCounter, 6777 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3296 SdHoareTripleChecker+Valid, 8858 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:15:28,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3296 Valid, 8858 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1345 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-21 00:15:28,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16421 states. [2021-11-21 00:15:29,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16421 to 16421. [2021-11-21 00:15:29,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16421 states, 9425 states have (on average 1.2697082228116712) internal successors, (11967), 9864 states have internal predecessors, (11967), 5383 states have call successors, (5383), 1636 states have call predecessors, (5383), 1610 states have return successors, (5524), 5156 states have call predecessors, (5524), 5379 states have call successors, (5524) [2021-11-21 00:15:29,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16421 states to 16421 states and 22874 transitions. [2021-11-21 00:15:29,470 INFO L78 Accepts]: Start accepts. Automaton has 16421 states and 22874 transitions. Word has length 462 [2021-11-21 00:15:29,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:15:29,471 INFO L470 AbstractCegarLoop]: Abstraction has 16421 states and 22874 transitions. [2021-11-21 00:15:29,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (55), 3 states have call predecessors, (55), 1 states have return successors, (53), 2 states have call predecessors, (53), 2 states have call successors, (53) [2021-11-21 00:15:29,471 INFO L276 IsEmpty]: Start isEmpty. Operand 16421 states and 22874 transitions. [2021-11-21 00:15:29,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2021-11-21 00:15:29,488 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:15:29,488 INFO L514 BasicCegarLoop]: trace histogram [37, 34, 34, 34, 34, 34, 34, 13, 12, 12, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:15:29,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-21 00:15:29,489 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 00:15:29,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:15:29,489 INFO L85 PathProgramCache]: Analyzing trace with hash 351111020, now seen corresponding path program 1 times [2021-11-21 00:15:29,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:15:29,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555771881] [2021-11-21 00:15:29,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:15:29,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:15:29,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:15:29,810 INFO L134 CoverageAnalysis]: Checked inductivity of 5011 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 4987 trivial. 0 not checked. [2021-11-21 00:15:29,811 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:15:29,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555771881] [2021-11-21 00:15:29,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555771881] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:15:29,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:15:29,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:15:29,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576308568] [2021-11-21 00:15:29,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:15:29,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:15:29,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:15:29,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:15:29,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:15:29,815 INFO L87 Difference]: Start difference. First operand 16421 states and 22874 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (62), 3 states have call predecessors, (62), 1 states have return successors, (60), 2 states have call predecessors, (60), 2 states have call successors, (60) [2021-11-21 00:15:33,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:15:33,091 INFO L93 Difference]: Finished difference Result 16427 states and 22879 transitions. [2021-11-21 00:15:33,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:15:33,092 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (62), 3 states have call predecessors, (62), 1 states have return successors, (60), 2 states have call predecessors, (60), 2 states have call successors, (60) Word has length 482 [2021-11-21 00:15:33,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:15:33,165 INFO L225 Difference]: With dead ends: 16427 [2021-11-21 00:15:33,165 INFO L226 Difference]: Without dead ends: 16425 [2021-11-21 00:15:33,178 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 [2021-11-21 00:15:33,179 INFO L933 BasicCegarLoop]: 2961 mSDtfsCounter, 3289 mSDsluCounter, 6777 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3294 SdHoareTripleChecker+Valid, 8858 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:15:33,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3294 Valid, 8858 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1345 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-21 00:15:33,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16425 states. [2021-11-21 00:15:34,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16425 to 16425. [2021-11-21 00:15:34,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16425 states, 9428 states have (on average 1.269622401357658) internal successors, (11970), 9867 states have internal predecessors, (11970), 5383 states have call successors, (5383), 1637 states have call predecessors, (5383), 1611 states have return successors, (5524), 5156 states have call predecessors, (5524), 5379 states have call successors, (5524) [2021-11-21 00:15:34,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16425 states to 16425 states and 22877 transitions. [2021-11-21 00:15:34,256 INFO L78 Accepts]: Start accepts. Automaton has 16425 states and 22877 transitions. Word has length 482 [2021-11-21 00:15:34,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:15:34,256 INFO L470 AbstractCegarLoop]: Abstraction has 16425 states and 22877 transitions. [2021-11-21 00:15:34,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (62), 3 states have call predecessors, (62), 1 states have return successors, (60), 2 states have call predecessors, (60), 2 states have call successors, (60) [2021-11-21 00:15:34,257 INFO L276 IsEmpty]: Start isEmpty. Operand 16425 states and 22877 transitions. [2021-11-21 00:15:34,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2021-11-21 00:15:34,268 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:15:34,268 INFO L514 BasicCegarLoop]: trace histogram [37, 34, 34, 34, 34, 34, 34, 14, 13, 13, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:15:34,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-21 00:15:34,269 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 00:15:34,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:15:34,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1765469084, now seen corresponding path program 1 times [2021-11-21 00:15:34,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:15:34,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475539274] [2021-11-21 00:15:34,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:15:34,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:15:34,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:15:34,541 INFO L134 CoverageAnalysis]: Checked inductivity of 5061 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 5035 trivial. 0 not checked. [2021-11-21 00:15:34,542 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:15:34,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475539274] [2021-11-21 00:15:34,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475539274] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:15:34,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:15:34,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:15:34,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760883749] [2021-11-21 00:15:34,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:15:34,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:15:34,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:15:34,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:15:34,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:15:34,544 INFO L87 Difference]: Start difference. First operand 16425 states and 22877 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (63), 3 states have call predecessors, (63), 1 states have return successors, (61), 2 states have call predecessors, (61), 2 states have call successors, (61) [2021-11-21 00:15:37,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:15:37,675 INFO L93 Difference]: Finished difference Result 16431 states and 22882 transitions. [2021-11-21 00:15:37,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:15:37,675 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (63), 3 states have call predecessors, (63), 1 states have return successors, (61), 2 states have call predecessors, (61), 2 states have call successors, (61) Word has length 487 [2021-11-21 00:15:37,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:15:37,728 INFO L225 Difference]: With dead ends: 16431 [2021-11-21 00:15:37,728 INFO L226 Difference]: Without dead ends: 16429 [2021-11-21 00:15:37,737 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 [2021-11-21 00:15:37,738 INFO L933 BasicCegarLoop]: 2961 mSDtfsCounter, 3289 mSDsluCounter, 6777 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3293 SdHoareTripleChecker+Valid, 8858 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:15:37,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3293 Valid, 8858 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1345 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-21 00:15:37,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16429 states. [2021-11-21 00:15:38,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16429 to 16429. [2021-11-21 00:15:38,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16429 states, 9431 states have (on average 1.269536634503234) internal successors, (11973), 9870 states have internal predecessors, (11973), 5383 states have call successors, (5383), 1638 states have call predecessors, (5383), 1612 states have return successors, (5524), 5156 states have call predecessors, (5524), 5379 states have call successors, (5524) [2021-11-21 00:15:38,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16429 states to 16429 states and 22880 transitions. [2021-11-21 00:15:38,735 INFO L78 Accepts]: Start accepts. Automaton has 16429 states and 22880 transitions. Word has length 487 [2021-11-21 00:15:38,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:15:38,736 INFO L470 AbstractCegarLoop]: Abstraction has 16429 states and 22880 transitions. [2021-11-21 00:15:38,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (63), 3 states have call predecessors, (63), 1 states have return successors, (61), 2 states have call predecessors, (61), 2 states have call successors, (61) [2021-11-21 00:15:38,737 INFO L276 IsEmpty]: Start isEmpty. Operand 16429 states and 22880 transitions. [2021-11-21 00:15:38,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2021-11-21 00:15:38,750 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:15:38,751 INFO L514 BasicCegarLoop]: trace histogram [40, 34, 34, 34, 34, 34, 34, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:15:38,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-21 00:15:38,751 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 00:15:38,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:15:38,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1425461334, now seen corresponding path program 1 times [2021-11-21 00:15:38,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:15:38,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391200231] [2021-11-21 00:15:38,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:15:38,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:15:38,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:15:39,000 INFO L134 CoverageAnalysis]: Checked inductivity of 4979 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4979 trivial. 0 not checked. [2021-11-21 00:15:39,000 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:15:39,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391200231] [2021-11-21 00:15:39,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391200231] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:15:39,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:15:39,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:15:39,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295849102] [2021-11-21 00:15:39,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:15:39,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:15:39,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:15:39,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:15:39,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:15:39,007 INFO L87 Difference]: Start difference. First operand 16429 states and 22880 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 2 states have call successors, (53), 2 states have call predecessors, (53), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) [2021-11-21 00:15:41,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:15:41,734 INFO L93 Difference]: Finished difference Result 32542 states and 45815 transitions. [2021-11-21 00:15:41,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:15:41,735 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 2 states have call successors, (53), 2 states have call predecessors, (53), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) Word has length 474 [2021-11-21 00:15:41,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:15:41,804 INFO L225 Difference]: With dead ends: 32542 [2021-11-21 00:15:41,804 INFO L226 Difference]: Without dead ends: 16484 [2021-11-21 00:15:41,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:15:41,846 INFO L933 BasicCegarLoop]: 2962 mSDtfsCounter, 3 mSDsluCounter, 3395 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 5918 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:15:41,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 5918 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 886 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-21 00:15:41,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16484 states. [2021-11-21 00:15:42,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16484 to 16434. [2021-11-21 00:15:42,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16434 states, 9436 states have (on average 1.2693938109368377) internal successors, (11978), 9875 states have internal predecessors, (11978), 5383 states have call successors, (5383), 1638 states have call predecessors, (5383), 1612 states have return successors, (5524), 5156 states have call predecessors, (5524), 5379 states have call successors, (5524) [2021-11-21 00:15:42,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16434 states to 16434 states and 22885 transitions. [2021-11-21 00:15:42,975 INFO L78 Accepts]: Start accepts. Automaton has 16434 states and 22885 transitions. Word has length 474 [2021-11-21 00:15:42,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:15:42,976 INFO L470 AbstractCegarLoop]: Abstraction has 16434 states and 22885 transitions. [2021-11-21 00:15:42,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 2 states have call successors, (53), 2 states have call predecessors, (53), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) [2021-11-21 00:15:42,976 INFO L276 IsEmpty]: Start isEmpty. Operand 16434 states and 22885 transitions. [2021-11-21 00:15:42,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2021-11-21 00:15:42,992 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:15:42,992 INFO L514 BasicCegarLoop]: trace histogram [37, 34, 34, 34, 34, 34, 34, 15, 14, 14, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:15:42,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-21 00:15:42,993 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 00:15:42,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:15:42,994 INFO L85 PathProgramCache]: Analyzing trace with hash -917226689, now seen corresponding path program 1 times [2021-11-21 00:15:42,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:15:42,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133826996] [2021-11-21 00:15:42,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:15:42,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:15:43,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:15:43,300 INFO L134 CoverageAnalysis]: Checked inductivity of 5114 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 5086 trivial. 0 not checked. [2021-11-21 00:15:43,301 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:15:43,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133826996] [2021-11-21 00:15:43,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133826996] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:15:43,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:15:43,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:15:43,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609968439] [2021-11-21 00:15:43,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:15:43,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:15:43,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:15:43,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:15:43,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:15:43,305 INFO L87 Difference]: Start difference. First operand 16434 states and 22885 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (64), 3 states have call predecessors, (64), 1 states have return successors, (62), 2 states have call predecessors, (62), 2 states have call successors, (62) [2021-11-21 00:15:45,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:15:45,790 INFO L93 Difference]: Finished difference Result 16440 states and 22890 transitions. [2021-11-21 00:15:45,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:15:45,793 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (64), 3 states have call predecessors, (64), 1 states have return successors, (62), 2 states have call predecessors, (62), 2 states have call successors, (62) Word has length 491 [2021-11-21 00:15:45,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:15:45,879 INFO L225 Difference]: With dead ends: 16440 [2021-11-21 00:15:45,879 INFO L226 Difference]: Without dead ends: 16438 [2021-11-21 00:15:45,889 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 [2021-11-21 00:15:45,890 INFO L933 BasicCegarLoop]: 2961 mSDtfsCounter, 3289 mSDsluCounter, 6777 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3292 SdHoareTripleChecker+Valid, 8858 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:15:45,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3292 Valid, 8858 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1345 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-21 00:15:45,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16438 states. [2021-11-21 00:15:46,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16438 to 16438. [2021-11-21 00:15:46,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16438 states, 9439 states have (on average 1.269308189426846) internal successors, (11981), 9878 states have internal predecessors, (11981), 5383 states have call successors, (5383), 1639 states have call predecessors, (5383), 1613 states have return successors, (5524), 5156 states have call predecessors, (5524), 5379 states have call successors, (5524) [2021-11-21 00:15:46,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16438 states to 16438 states and 22888 transitions. [2021-11-21 00:15:46,998 INFO L78 Accepts]: Start accepts. Automaton has 16438 states and 22888 transitions. Word has length 491 [2021-11-21 00:15:46,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:15:46,999 INFO L470 AbstractCegarLoop]: Abstraction has 16438 states and 22888 transitions. [2021-11-21 00:15:46,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (64), 3 states have call predecessors, (64), 1 states have return successors, (62), 2 states have call predecessors, (62), 2 states have call successors, (62) [2021-11-21 00:15:46,999 INFO L276 IsEmpty]: Start isEmpty. Operand 16438 states and 22888 transitions. [2021-11-21 00:15:47,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2021-11-21 00:15:47,011 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:15:47,011 INFO L514 BasicCegarLoop]: trace histogram [37, 34, 34, 34, 34, 34, 34, 16, 15, 15, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:15:47,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-21 00:15:47,012 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 00:15:47,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:15:47,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1914766351, now seen corresponding path program 1 times [2021-11-21 00:15:47,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:15:47,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129679670] [2021-11-21 00:15:47,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:15:47,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:15:47,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:15:47,301 INFO L134 CoverageAnalysis]: Checked inductivity of 5172 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 5142 trivial. 0 not checked. [2021-11-21 00:15:47,301 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:15:47,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129679670] [2021-11-21 00:15:47,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129679670] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:15:47,302 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:15:47,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:15:47,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358467070] [2021-11-21 00:15:47,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:15:47,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:15:47,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:15:47,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:15:47,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:15:47,305 INFO L87 Difference]: Start difference. First operand 16438 states and 22888 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (65), 3 states have call predecessors, (65), 1 states have return successors, (63), 2 states have call predecessors, (63), 2 states have call successors, (63) [2021-11-21 00:15:50,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:15:50,487 INFO L93 Difference]: Finished difference Result 16444 states and 22893 transitions. [2021-11-21 00:15:50,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:15:50,487 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (65), 3 states have call predecessors, (65), 1 states have return successors, (63), 2 states have call predecessors, (63), 2 states have call successors, (63) Word has length 496 [2021-11-21 00:15:50,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:15:50,555 INFO L225 Difference]: With dead ends: 16444 [2021-11-21 00:15:50,555 INFO L226 Difference]: Without dead ends: 16442 [2021-11-21 00:15:50,563 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 [2021-11-21 00:15:50,563 INFO L933 BasicCegarLoop]: 2961 mSDtfsCounter, 3289 mSDsluCounter, 6777 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3291 SdHoareTripleChecker+Valid, 8858 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:15:50,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3291 Valid, 8858 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1345 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-21 00:15:50,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16442 states. [2021-11-21 00:15:51,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16442 to 16442. [2021-11-21 00:15:51,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16442 states, 9442 states have (on average 1.2692226223257785) internal successors, (11984), 9881 states have internal predecessors, (11984), 5383 states have call successors, (5383), 1640 states have call predecessors, (5383), 1614 states have return successors, (5524), 5156 states have call predecessors, (5524), 5379 states have call successors, (5524) [2021-11-21 00:15:51,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16442 states to 16442 states and 22891 transitions. [2021-11-21 00:15:51,541 INFO L78 Accepts]: Start accepts. Automaton has 16442 states and 22891 transitions. Word has length 496 [2021-11-21 00:15:51,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:15:51,542 INFO L470 AbstractCegarLoop]: Abstraction has 16442 states and 22891 transitions. [2021-11-21 00:15:51,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (65), 3 states have call predecessors, (65), 1 states have return successors, (63), 2 states have call predecessors, (63), 2 states have call successors, (63) [2021-11-21 00:15:51,542 INFO L276 IsEmpty]: Start isEmpty. Operand 16442 states and 22891 transitions. [2021-11-21 00:15:51,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2021-11-21 00:15:51,553 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:15:51,554 INFO L514 BasicCegarLoop]: trace histogram [40, 34, 34, 34, 34, 34, 34, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:15:51,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-21 00:15:51,554 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 00:15:51,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:15:51,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1995685088, now seen corresponding path program 1 times [2021-11-21 00:15:51,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:15:51,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187081293] [2021-11-21 00:15:51,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:15:51,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:15:51,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:15:51,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4979 trivial. 0 not checked. [2021-11-21 00:15:51,777 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:15:51,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187081293] [2021-11-21 00:15:51,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187081293] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:15:51,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23228610] [2021-11-21 00:15:51,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:15:51,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:15:51,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76d3fadd-5fd4-4c23-8478-64d2bdfbf115/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:15:51,780 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76d3fadd-5fd4-4c23-8478-64d2bdfbf115/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:15:51,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76d3fadd-5fd4-4c23-8478-64d2bdfbf115/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:15:52,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:15:52,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 3360 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:15:52,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:15:53,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 4875 trivial. 0 not checked. [2021-11-21 00:15:53,922 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:15:53,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23228610] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:15:53,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:15:53,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-21 00:15:53,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379751370] [2021-11-21 00:15:53,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:15:53,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:15:53,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:15:53,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:15:53,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:15:53,925 INFO L87 Difference]: Start difference. First operand 16442 states and 22891 transitions. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 3 states have call successors, (55), 3 states have call predecessors, (55), 3 states have return successors, (51), 3 states have call predecessors, (51), 3 states have call successors, (51) [2021-11-21 00:16:00,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:16:00,719 INFO L93 Difference]: Finished difference Result 36296 states and 50501 transitions. [2021-11-21 00:16:00,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:16:00,719 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 3 states have call successors, (55), 3 states have call predecessors, (55), 3 states have return successors, (51), 3 states have call predecessors, (51), 3 states have call successors, (51) Word has length 480 [2021-11-21 00:16:00,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:16:00,797 INFO L225 Difference]: With dead ends: 36296 [2021-11-21 00:16:00,798 INFO L226 Difference]: Without dead ends: 20225 [2021-11-21 00:16:00,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 479 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:16:00,854 INFO L933 BasicCegarLoop]: 5724 mSDtfsCounter, 3251 mSDsluCounter, 4977 mSDsCounter, 0 mSdLazyCounter, 3286 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3251 SdHoareTripleChecker+Valid, 9876 SdHoareTripleChecker+Invalid, 3298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 3286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:16:00,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3251 Valid, 9876 Invalid, 3298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 3286 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2021-11-21 00:16:00,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20225 states. [2021-11-21 00:16:01,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20225 to 20128. [2021-11-21 00:16:01,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20128 states, 11579 states have (on average 1.2704896795923655) internal successors, (14711), 12115 states have internal predecessors, (14711), 6562 states have call successors, (6562), 2015 states have call predecessors, (6562), 1984 states have return successors, (6732), 6284 states have call predecessors, (6732), 6558 states have call successors, (6732) [2021-11-21 00:16:02,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20128 states to 20128 states and 28005 transitions. [2021-11-21 00:16:02,067 INFO L78 Accepts]: Start accepts. Automaton has 20128 states and 28005 transitions. Word has length 480 [2021-11-21 00:16:02,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:16:02,068 INFO L470 AbstractCegarLoop]: Abstraction has 20128 states and 28005 transitions. [2021-11-21 00:16:02,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 3 states have call successors, (55), 3 states have call predecessors, (55), 3 states have return successors, (51), 3 states have call predecessors, (51), 3 states have call successors, (51) [2021-11-21 00:16:02,068 INFO L276 IsEmpty]: Start isEmpty. Operand 20128 states and 28005 transitions. [2021-11-21 00:16:02,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2021-11-21 00:16:02,079 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:16:02,079 INFO L514 BasicCegarLoop]: trace histogram [40, 34, 34, 34, 34, 34, 34, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:16:02,114 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76d3fadd-5fd4-4c23-8478-64d2bdfbf115/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-21 00:16:02,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76d3fadd-5fd4-4c23-8478-64d2bdfbf115/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-21 00:16:02,280 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 00:16:02,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:16:02,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1656603942, now seen corresponding path program 1 times [2021-11-21 00:16:02,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:16:02,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271593551] [2021-11-21 00:16:02,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:16:02,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:16:02,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:16:02,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4981 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4980 trivial. 0 not checked. [2021-11-21 00:16:02,647 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:16:02,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271593551] [2021-11-21 00:16:02,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271593551] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:16:02,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483167925] [2021-11-21 00:16:02,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:16:02,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:16:02,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76d3fadd-5fd4-4c23-8478-64d2bdfbf115/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:16:02,649 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76d3fadd-5fd4-4c23-8478-64d2bdfbf115/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:16:02,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76d3fadd-5fd4-4c23-8478-64d2bdfbf115/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:16:03,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:16:03,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 3362 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:16:03,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:16:04,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4981 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 4875 trivial. 0 not checked. [2021-11-21 00:16:04,638 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:16:04,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483167925] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:16:04,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:16:04,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-21 00:16:04,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638301375] [2021-11-21 00:16:04,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:16:04,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:16:04,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:16:04,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:16:04,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:16:04,642 INFO L87 Difference]: Start difference. First operand 20128 states and 28005 transitions. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 3 states have call successors, (55), 3 states have call predecessors, (55), 3 states have return successors, (51), 3 states have call predecessors, (51), 3 states have call successors, (51) [2021-11-21 00:16:10,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:16:10,752 INFO L93 Difference]: Finished difference Result 44035 states and 61215 transitions. [2021-11-21 00:16:10,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:16:10,753 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 3 states have call successors, (55), 3 states have call predecessors, (55), 3 states have return successors, (51), 3 states have call predecessors, (51), 3 states have call successors, (51) Word has length 482 [2021-11-21 00:16:10,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:16:10,860 INFO L225 Difference]: With dead ends: 44035 [2021-11-21 00:16:10,861 INFO L226 Difference]: Without dead ends: 24278 [2021-11-21 00:16:10,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:16:10,922 INFO L933 BasicCegarLoop]: 5724 mSDtfsCounter, 3202 mSDsluCounter, 8308 mSDsCounter, 0 mSdLazyCounter, 3755 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3202 SdHoareTripleChecker+Valid, 12795 SdHoareTripleChecker+Invalid, 3762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 3755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:16:10,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3202 Valid, 12795 Invalid, 3762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 3755 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-11-21 00:16:10,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24278 states. [2021-11-21 00:16:12,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24278 to 24181. [2021-11-21 00:16:12,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24181 states, 13933 states have (on average 1.2710112682121582) internal successors, (17709), 14576 states have internal predecessors, (17709), 7846 states have call successors, (7846), 2435 states have call predecessors, (7846), 2399 states have return successors, (8045), 7511 states have call predecessors, (8045), 7842 states have call successors, (8045) [2021-11-21 00:16:12,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24181 states to 24181 states and 33600 transitions. [2021-11-21 00:16:12,714 INFO L78 Accepts]: Start accepts. Automaton has 24181 states and 33600 transitions. Word has length 482 [2021-11-21 00:16:12,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:16:12,715 INFO L470 AbstractCegarLoop]: Abstraction has 24181 states and 33600 transitions. [2021-11-21 00:16:12,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 3 states have call successors, (55), 3 states have call predecessors, (55), 3 states have return successors, (51), 3 states have call predecessors, (51), 3 states have call successors, (51) [2021-11-21 00:16:12,716 INFO L276 IsEmpty]: Start isEmpty. Operand 24181 states and 33600 transitions. [2021-11-21 00:16:12,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2021-11-21 00:16:12,732 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:16:12,732 INFO L514 BasicCegarLoop]: trace histogram [37, 34, 34, 34, 34, 34, 34, 17, 16, 16, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:16:12,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76d3fadd-5fd4-4c23-8478-64d2bdfbf115/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:16:12,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76d3fadd-5fd4-4c23-8478-64d2bdfbf115/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-21 00:16:12,958 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 00:16:12,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:16:12,958 INFO L85 PathProgramCache]: Analyzing trace with hash 2068557036, now seen corresponding path program 1 times [2021-11-21 00:16:12,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:16:12,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492860141] [2021-11-21 00:16:12,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:16:12,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:16:13,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:16:13,404 INFO L134 CoverageAnalysis]: Checked inductivity of 5235 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 5203 trivial. 0 not checked. [2021-11-21 00:16:13,404 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:16:13,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492860141] [2021-11-21 00:16:13,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492860141] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:16:13,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:16:13,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:16:13,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722511593] [2021-11-21 00:16:13,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:16:13,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:16:13,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:16:13,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:16:13,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:16:13,407 INFO L87 Difference]: Start difference. First operand 24181 states and 33600 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (66), 3 states have call predecessors, (66), 1 states have return successors, (64), 2 states have call predecessors, (64), 2 states have call successors, (64) [2021-11-21 00:16:16,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:16:16,882 INFO L93 Difference]: Finished difference Result 24187 states and 33605 transitions. [2021-11-21 00:16:16,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:16:16,883 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (66), 3 states have call predecessors, (66), 1 states have return successors, (64), 2 states have call predecessors, (64), 2 states have call successors, (64) Word has length 502 [2021-11-21 00:16:16,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:16:16,969 INFO L225 Difference]: With dead ends: 24187 [2021-11-21 00:16:16,969 INFO L226 Difference]: Without dead ends: 24183 [2021-11-21 00:16:16,983 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 [2021-11-21 00:16:16,984 INFO L933 BasicCegarLoop]: 2961 mSDtfsCounter, 3289 mSDsluCounter, 6777 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3290 SdHoareTripleChecker+Valid, 8858 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:16:16,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3290 Valid, 8858 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1345 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-21 00:16:17,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24183 states. [2021-11-21 00:16:18,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24183 to 24183. [2021-11-21 00:16:18,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24183 states, 13935 states have (on average 1.2709006099748834) internal successors, (17710), 14577 states have internal predecessors, (17710), 7846 states have call successors, (7846), 2436 states have call predecessors, (7846), 2399 states have return successors, (8045), 7511 states have call predecessors, (8045), 7842 states have call successors, (8045) [2021-11-21 00:16:18,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24183 states to 24183 states and 33601 transitions. [2021-11-21 00:16:18,800 INFO L78 Accepts]: Start accepts. Automaton has 24183 states and 33601 transitions. Word has length 502 [2021-11-21 00:16:18,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:16:18,800 INFO L470 AbstractCegarLoop]: Abstraction has 24183 states and 33601 transitions. [2021-11-21 00:16:18,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (66), 3 states have call predecessors, (66), 1 states have return successors, (64), 2 states have call predecessors, (64), 2 states have call successors, (64) [2021-11-21 00:16:18,801 INFO L276 IsEmpty]: Start isEmpty. Operand 24183 states and 33601 transitions. [2021-11-21 00:16:18,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2021-11-21 00:16:18,811 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:16:18,811 INFO L514 BasicCegarLoop]: trace histogram [37, 34, 34, 34, 34, 34, 34, 18, 17, 17, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:16:18,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-21 00:16:18,811 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 00:16:18,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:16:18,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1536760298, now seen corresponding path program 1 times [2021-11-21 00:16:18,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:16:18,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137357874] [2021-11-21 00:16:18,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:16:18,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:16:18,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:16:19,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5298 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 5264 trivial. 0 not checked. [2021-11-21 00:16:19,094 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:16:19,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137357874] [2021-11-21 00:16:19,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137357874] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:16:19,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:16:19,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:16:19,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904588033] [2021-11-21 00:16:19,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:16:19,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:16:19,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:16:19,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:16:19,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:16:19,097 INFO L87 Difference]: Start difference. First operand 24183 states and 33601 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (61), 3 states have call predecessors, (61), 1 states have return successors, (59), 2 states have call predecessors, (59), 2 states have call successors, (59) [2021-11-21 00:16:21,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:16:21,971 INFO L93 Difference]: Finished difference Result 24183 states and 33601 transitions. [2021-11-21 00:16:21,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:16:21,972 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (61), 3 states have call predecessors, (61), 1 states have return successors, (59), 2 states have call predecessors, (59), 2 states have call successors, (59) Word has length 492 [2021-11-21 00:16:21,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:16:22,043 INFO L225 Difference]: With dead ends: 24183 [2021-11-21 00:16:22,044 INFO L226 Difference]: Without dead ends: 23738 [2021-11-21 00:16:22,055 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 [2021-11-21 00:16:22,055 INFO L933 BasicCegarLoop]: 2959 mSDtfsCounter, 3286 mSDsluCounter, 6776 mSDsCounter, 0 mSdLazyCounter, 1340 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3286 SdHoareTripleChecker+Valid, 8855 SdHoareTripleChecker+Invalid, 1341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:16:22,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3286 Valid, 8855 Invalid, 1341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1340 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-21 00:16:22,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23738 states. [2021-11-21 00:16:24,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23738 to 23738. [2021-11-21 00:16:24,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23738 states, 13753 states have (on average 1.2709954191812696) internal successors, (17480), 14347 states have internal predecessors, (17480), 7665 states have call successors, (7665), 2353 states have call predecessors, (7665), 2318 states have return successors, (7868), 7379 states have call predecessors, (7868), 7665 states have call successors, (7868) [2021-11-21 00:16:24,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23738 states to 23738 states and 33013 transitions. [2021-11-21 00:16:24,395 INFO L78 Accepts]: Start accepts. Automaton has 23738 states and 33013 transitions. Word has length 492 [2021-11-21 00:16:24,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:16:24,396 INFO L470 AbstractCegarLoop]: Abstraction has 23738 states and 33013 transitions. [2021-11-21 00:16:24,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (61), 3 states have call predecessors, (61), 1 states have return successors, (59), 2 states have call predecessors, (59), 2 states have call successors, (59) [2021-11-21 00:16:24,397 INFO L276 IsEmpty]: Start isEmpty. Operand 23738 states and 33013 transitions. [2021-11-21 00:16:24,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2021-11-21 00:16:24,416 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:16:24,416 INFO L514 BasicCegarLoop]: trace histogram [42, 34, 34, 34, 34, 34, 34, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:16:24,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-21 00:16:24,417 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 00:16:24,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:16:24,418 INFO L85 PathProgramCache]: Analyzing trace with hash 302961141, now seen corresponding path program 1 times [2021-11-21 00:16:24,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:16:24,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641952420] [2021-11-21 00:16:24,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:16:24,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:16:24,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:16:24,778 INFO L134 CoverageAnalysis]: Checked inductivity of 5171 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 5142 trivial. 0 not checked. [2021-11-21 00:16:24,778 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:16:24,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641952420] [2021-11-21 00:16:24,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641952420] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:16:24,779 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:16:24,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:16:24,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814589528] [2021-11-21 00:16:24,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:16:24,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:16:24,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:16:24,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:16:24,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:16:24,787 INFO L87 Difference]: Start difference. First operand 23738 states and 33013 transitions. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 3 states have call successors, (57), 2 states have call predecessors, (57), 2 states have return successors, (53), 4 states have call predecessors, (53), 3 states have call successors, (53) [2021-11-21 00:16:31,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:16:31,845 INFO L93 Difference]: Finished difference Result 51172 states and 71110 transitions. [2021-11-21 00:16:31,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:16:31,846 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 3 states have call successors, (57), 2 states have call predecessors, (57), 2 states have return successors, (53), 4 states have call predecessors, (53), 3 states have call successors, (53) Word has length 505 [2021-11-21 00:16:31,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:16:31,960 INFO L225 Difference]: With dead ends: 51172 [2021-11-21 00:16:31,961 INFO L226 Difference]: Without dead ends: 27805 [2021-11-21 00:16:32,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:16:32,029 INFO L933 BasicCegarLoop]: 5514 mSDtfsCounter, 3120 mSDsluCounter, 15922 mSDsCounter, 0 mSdLazyCounter, 2947 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3121 SdHoareTripleChecker+Valid, 19406 SdHoareTripleChecker+Invalid, 2950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 2947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-21 00:16:32,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3121 Valid, 19406 Invalid, 2950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 2947 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-11-21 00:16:32,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27805 states. [2021-11-21 00:16:34,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27805 to 27789. [2021-11-21 00:16:34,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27789 states, 16119 states have (on average 1.2705502822755754) internal successors, (20480), 16807 states have internal predecessors, (20480), 8930 states have call successors, (8930), 2774 states have call predecessors, (8930), 2738 states have return successors, (9166), 8604 states have call predecessors, (9166), 8930 states have call successors, (9166) [2021-11-21 00:16:34,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27789 states to 27789 states and 38576 transitions. [2021-11-21 00:16:34,582 INFO L78 Accepts]: Start accepts. Automaton has 27789 states and 38576 transitions. Word has length 505 [2021-11-21 00:16:34,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:16:34,583 INFO L470 AbstractCegarLoop]: Abstraction has 27789 states and 38576 transitions. [2021-11-21 00:16:34,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 3 states have call successors, (57), 2 states have call predecessors, (57), 2 states have return successors, (53), 4 states have call predecessors, (53), 3 states have call successors, (53) [2021-11-21 00:16:34,584 INFO L276 IsEmpty]: Start isEmpty. Operand 27789 states and 38576 transitions. [2021-11-21 00:16:34,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2021-11-21 00:16:34,612 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:16:34,613 INFO L514 BasicCegarLoop]: trace histogram [42, 34, 34, 34, 34, 34, 34, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:16:34,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-21 00:16:34,613 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 00:16:34,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:16:34,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1537328624, now seen corresponding path program 1 times [2021-11-21 00:16:34,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:16:34,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945982823] [2021-11-21 00:16:34,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:16:34,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:16:34,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:16:34,869 INFO L134 CoverageAnalysis]: Checked inductivity of 5171 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 5142 trivial. 0 not checked. [2021-11-21 00:16:34,869 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:16:34,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945982823] [2021-11-21 00:16:34,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945982823] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:16:34,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:16:34,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:16:34,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739964428] [2021-11-21 00:16:34,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:16:34,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:16:34,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:16:34,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:16:34,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:16:34,873 INFO L87 Difference]: Start difference. First operand 27789 states and 38576 transitions. Second operand has 5 states, 5 states have (on average 25.2) internal successors, (126), 4 states have internal predecessors, (126), 3 states have call successors, (57), 2 states have call predecessors, (57), 2 states have return successors, (53), 4 states have call predecessors, (53), 3 states have call successors, (53) [2021-11-21 00:16:40,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:16:40,753 INFO L93 Difference]: Finished difference Result 62967 states and 87163 transitions. [2021-11-21 00:16:40,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:16:40,753 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 4 states have internal predecessors, (126), 3 states have call successors, (57), 2 states have call predecessors, (57), 2 states have return successors, (53), 4 states have call predecessors, (53), 3 states have call successors, (53) Word has length 506 [2021-11-21 00:16:40,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:16:40,894 INFO L225 Difference]: With dead ends: 62967 [2021-11-21 00:16:40,894 INFO L226 Difference]: Without dead ends: 35549 [2021-11-21 00:16:40,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:16:40,975 INFO L933 BasicCegarLoop]: 5429 mSDtfsCounter, 3119 mSDsluCounter, 15717 mSDsCounter, 0 mSdLazyCounter, 2909 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3119 SdHoareTripleChecker+Valid, 19150 SdHoareTripleChecker+Invalid, 2916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 2909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:16:40,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3119 Valid, 19150 Invalid, 2916 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [7 Valid, 2909 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-21 00:16:41,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35549 states. [2021-11-21 00:16:43,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35549 to 35531. [2021-11-21 00:16:43,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35531 states, 20514 states have (on average 1.2677683533196842) internal successors, (26007), 21431 states have internal predecessors, (26007), 11350 states have call successors, (11350), 3717 states have call predecessors, (11350), 3665 states have return successors, (11691), 10903 states have call predecessors, (11691), 11350 states have call successors, (11691) [2021-11-21 00:16:43,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35531 states to 35531 states and 49048 transitions. [2021-11-21 00:16:43,795 INFO L78 Accepts]: Start accepts. Automaton has 35531 states and 49048 transitions. Word has length 506 [2021-11-21 00:16:43,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:16:43,796 INFO L470 AbstractCegarLoop]: Abstraction has 35531 states and 49048 transitions. [2021-11-21 00:16:43,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 4 states have internal predecessors, (126), 3 states have call successors, (57), 2 states have call predecessors, (57), 2 states have return successors, (53), 4 states have call predecessors, (53), 3 states have call successors, (53) [2021-11-21 00:16:43,797 INFO L276 IsEmpty]: Start isEmpty. Operand 35531 states and 49048 transitions. [2021-11-21 00:16:43,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2021-11-21 00:16:43,830 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:16:43,831 INFO L514 BasicCegarLoop]: trace histogram [42, 34, 34, 34, 34, 34, 34, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:16:43,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-21 00:16:43,832 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 00:16:43,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:16:43,833 INFO L85 PathProgramCache]: Analyzing trace with hash -233771896, now seen corresponding path program 1 times [2021-11-21 00:16:43,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:16:43,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082881193] [2021-11-21 00:16:43,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:16:43,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:16:43,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:16:44,103 INFO L134 CoverageAnalysis]: Checked inductivity of 5171 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 5142 trivial. 0 not checked. [2021-11-21 00:16:44,103 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:16:44,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082881193] [2021-11-21 00:16:44,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082881193] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:16:44,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:16:44,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:16:44,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535710689] [2021-11-21 00:16:44,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:16:44,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:16:44,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:16:44,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:16:44,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:16:44,106 INFO L87 Difference]: Start difference. First operand 35531 states and 49048 transitions. Second operand has 5 states, 5 states have (on average 25.4) internal successors, (127), 4 states have internal predecessors, (127), 3 states have call successors, (57), 2 states have call predecessors, (57), 2 states have return successors, (53), 4 states have call predecessors, (53), 3 states have call successors, (53)