./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-mutex_fs-binfmt_misc.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_f61cd23f-6157-49ce-b67f-cd92bcc7377a/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f61cd23f-6157-49ce-b67f-cd92bcc7377a/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_f61cd23f-6157-49ce-b67f-cd92bcc7377a/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f61cd23f-6157-49ce-b67f-cd92bcc7377a/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f61cd23f-6157-49ce-b67f-cd92bcc7377a/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_f61cd23f-6157-49ce-b67f-cd92bcc7377a/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 2c6afaf5bedcc2af934f5b2a4cc6fb91099717aaf97d30d9787d5c01855a1a43 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:56:32,411 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:56:32,414 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:56:32,459 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:56:32,459 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:56:32,464 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:56:32,466 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:56:32,470 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:56:32,472 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:56:32,480 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:56:32,481 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:56:32,483 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:56:32,483 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:56:32,487 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:56:32,490 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:56:32,497 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:56:32,497 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:56:32,498 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:56:32,500 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:56:32,502 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:56:32,503 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:56:32,505 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:56:32,506 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:56:32,507 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:56:32,511 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:56:32,511 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:56:32,512 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:56:32,513 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:56:32,513 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:56:32,514 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:56:32,515 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:56:32,516 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:56:32,516 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:56:32,521 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:56:32,524 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:56:32,524 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:56:32,525 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:56:32,525 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:56:32,525 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:56:32,526 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:56:32,527 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:56:32,528 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f61cd23f-6157-49ce-b67f-cd92bcc7377a/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-21 01:56:32,575 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:56:32,575 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:56:32,576 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:56:32,576 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:56:32,576 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:56:32,577 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:56:32,577 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:56:32,583 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:56:32,583 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:56:32,583 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:56:32,584 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:56:32,584 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:56:32,584 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:56:32,584 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:56:32,584 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:56:32,585 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:56:32,585 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:56:32,585 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:56:32,586 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:56:32,586 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:56:32,586 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:56:32,586 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:56:32,587 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:56:32,587 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:56:32,587 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:56:32,587 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:56:32,587 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:56:32,588 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:56:32,588 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:56:32,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:56:32,588 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:56:32,589 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:56:32,589 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:56:32,589 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:56:32,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:56:32,589 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:56:32,590 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:56:32,590 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:56:32,590 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_f61cd23f-6157-49ce-b67f-cd92bcc7377a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f61cd23f-6157-49ce-b67f-cd92bcc7377a/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2c6afaf5bedcc2af934f5b2a4cc6fb91099717aaf97d30d9787d5c01855a1a43 [2021-11-21 01:56:32,855 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:56:32,878 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:56:32,881 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:56:32,882 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:56:32,883 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:56:32,884 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f61cd23f-6157-49ce-b67f-cd92bcc7377a/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i [2021-11-21 01:56:32,963 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f61cd23f-6157-49ce-b67f-cd92bcc7377a/bin/utaipan-TEXQjIfE4P/data/7b95e32ea/ae00c10ffd044e1984c3ffe1f484e703/FLAG52cc0efb7 [2021-11-21 01:56:33,766 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:56:33,767 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f61cd23f-6157-49ce-b67f-cd92bcc7377a/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i [2021-11-21 01:56:33,815 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f61cd23f-6157-49ce-b67f-cd92bcc7377a/bin/utaipan-TEXQjIfE4P/data/7b95e32ea/ae00c10ffd044e1984c3ffe1f484e703/FLAG52cc0efb7 [2021-11-21 01:56:34,309 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f61cd23f-6157-49ce-b67f-cd92bcc7377a/bin/utaipan-TEXQjIfE4P/data/7b95e32ea/ae00c10ffd044e1984c3ffe1f484e703 [2021-11-21 01:56:34,311 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:56:34,320 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:56:34,325 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:56:34,326 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:56:34,329 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:56:34,329 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:56:34" (1/1) ... [2021-11-21 01:56:34,331 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67bcaa47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:56:34, skipping insertion in model container [2021-11-21 01:56:34,331 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:56:34" (1/1) ... [2021-11-21 01:56:34,339 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:56:34,464 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:56:36,168 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_f61cd23f-6157-49ce-b67f-cd92bcc7377a/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i[193323,193336] [2021-11-21 01:56:36,172 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_f61cd23f-6157-49ce-b67f-cd92bcc7377a/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i[193489,193502] [2021-11-21 01:56:36,173 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_f61cd23f-6157-49ce-b67f-cd92bcc7377a/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i[193653,193666] [2021-11-21 01:56:36,173 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_f61cd23f-6157-49ce-b67f-cd92bcc7377a/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i[193818,193831] [2021-11-21 01:56:36,194 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:56:36,236 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:56:36,548 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_f61cd23f-6157-49ce-b67f-cd92bcc7377a/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i[193323,193336] [2021-11-21 01:56:36,550 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f61cd23f-6157-49ce-b67f-cd92bcc7377a/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i[193489,193502] [2021-11-21 01:56:36,550 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f61cd23f-6157-49ce-b67f-cd92bcc7377a/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i[193653,193666] [2021-11-21 01:56:36,551 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_f61cd23f-6157-49ce-b67f-cd92bcc7377a/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i[193818,193831] [2021-11-21 01:56:36,565 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:56:36,662 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:56:36,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:56:36 WrapperNode [2021-11-21 01:56:36,663 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:56:36,664 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:56:36,664 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:56:36,665 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:56:36,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:56:36" (1/1) ... [2021-11-21 01:56:36,763 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:56:36" (1/1) ... [2021-11-21 01:56:36,913 INFO L137 Inliner]: procedures = 238, calls = 999, calls flagged for inlining = 130, calls inlined = 118, statements flattened = 3013 [2021-11-21 01:56:36,913 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:56:36,914 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:56:36,914 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:56:36,915 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:56:36,923 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:56:36" (1/1) ... [2021-11-21 01:56:36,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:56:36" (1/1) ... [2021-11-21 01:56:36,954 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:56:36" (1/1) ... [2021-11-21 01:56:36,955 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:56:36" (1/1) ... [2021-11-21 01:56:37,062 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:56:36" (1/1) ... [2021-11-21 01:56:37,095 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:56:36" (1/1) ... [2021-11-21 01:56:37,127 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:56:36" (1/1) ... [2021-11-21 01:56:37,157 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:56:37,158 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:56:37,158 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:56:37,158 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:56:37,159 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:56:36" (1/1) ... [2021-11-21 01:56:37,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:56:37,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f61cd23f-6157-49ce-b67f-cd92bcc7377a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:56:37,239 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f61cd23f-6157-49ce-b67f-cd92bcc7377a/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:56:37,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f61cd23f-6157-49ce-b67f-cd92bcc7377a/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:56:37,284 INFO L130 BoogieDeclarations]: Found specification of procedure dput [2021-11-21 01:56:37,284 INFO L138 BoogieDeclarations]: Found implementation of procedure dput [2021-11-21 01:56:37,284 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-21 01:56:37,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-21 01:56:37,284 INFO L130 BoogieDeclarations]: Found specification of procedure file_inode [2021-11-21 01:56:37,285 INFO L138 BoogieDeclarations]: Found implementation of procedure file_inode [2021-11-21 01:56:37,285 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_write_unlock [2021-11-21 01:56:37,285 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_write_unlock [2021-11-21 01:56:37,285 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-21 01:56:37,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-21 01:56:37,285 INFO L130 BoogieDeclarations]: Found specification of procedure dget [2021-11-21 01:56:37,286 INFO L138 BoogieDeclarations]: Found implementation of procedure dget [2021-11-21 01:56:37,286 INFO L130 BoogieDeclarations]: Found specification of procedure copy_strings_kernel [2021-11-21 01:56:37,286 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_strings_kernel [2021-11-21 01:56:37,286 INFO L130 BoogieDeclarations]: Found specification of procedure simple_statfs [2021-11-21 01:56:37,286 INFO L138 BoogieDeclarations]: Found implementation of procedure simple_statfs [2021-11-21 01:56:37,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-21 01:56:37,286 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-21 01:56:37,287 INFO L130 BoogieDeclarations]: Found specification of procedure ERR_PTR [2021-11-21 01:56:37,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ERR_PTR [2021-11-21 01:56:37,287 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:56:37,287 INFO L130 BoogieDeclarations]: Found specification of procedure kill_node [2021-11-21 01:56:37,287 INFO L138 BoogieDeclarations]: Found implementation of procedure kill_node [2021-11-21 01:56:37,288 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_i_mutex_of_inode [2021-11-21 01:56:37,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_i_mutex_of_inode [2021-11-21 01:56:37,288 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 01:56:37,288 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-21 01:56:37,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-21 01:56:37,289 INFO L130 BoogieDeclarations]: Found specification of procedure allow_write_access [2021-11-21 01:56:37,289 INFO L138 BoogieDeclarations]: Found implementation of procedure allow_write_access [2021-11-21 01:56:37,289 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-21 01:56:37,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-21 01:56:37,290 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exit [2021-11-21 01:56:37,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exit [2021-11-21 01:56:37,290 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_EMGentry_exit_exit_misc_binfmt_7_2 [2021-11-21 01:56:37,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_EMGentry_exit_exit_misc_binfmt_7_2 [2021-11-21 01:56:37,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:56:37,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 01:56:37,291 INFO L130 BoogieDeclarations]: Found specification of procedure bm_evict_inode [2021-11-21 01:56:37,291 INFO L138 BoogieDeclarations]: Found implementation of procedure bm_evict_inode [2021-11-21 01:56:37,291 INFO L130 BoogieDeclarations]: Found specification of procedure kill_litter_super [2021-11-21 01:56:37,291 INFO L138 BoogieDeclarations]: Found implementation of procedure kill_litter_super [2021-11-21 01:56:37,292 INFO L130 BoogieDeclarations]: Found specification of procedure simple_read_from_buffer [2021-11-21 01:56:37,292 INFO L138 BoogieDeclarations]: Found implementation of procedure simple_read_from_buffer [2021-11-21 01:56:37,293 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-21 01:56:37,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-21 01:56:37,294 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-11-21 01:56:37,294 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-11-21 01:56:37,294 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-21 01:56:37,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-21 01:56:37,294 INFO L130 BoogieDeclarations]: Found specification of procedure parse_command [2021-11-21 01:56:37,295 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_command [2021-11-21 01:56:37,295 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 01:56:37,295 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_mutex__one_thread_double_lock [2021-11-21 01:56:37,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_mutex__one_thread_double_lock [2021-11-21 01:56:37,296 INFO L130 BoogieDeclarations]: Found specification of procedure bm_register_write [2021-11-21 01:56:37,296 INFO L138 BoogieDeclarations]: Found implementation of procedure bm_register_write [2021-11-21 01:56:37,296 INFO L130 BoogieDeclarations]: Found specification of procedure bm_entry_read [2021-11-21 01:56:37,296 INFO L138 BoogieDeclarations]: Found implementation of procedure bm_entry_read [2021-11-21 01:56:37,296 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-21 01:56:37,296 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-21 01:56:37,296 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2021-11-21 01:56:37,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2021-11-21 01:56:37,297 INFO L130 BoogieDeclarations]: Found specification of procedure bm_status_write [2021-11-21 01:56:37,297 INFO L138 BoogieDeclarations]: Found implementation of procedure bm_status_write [2021-11-21 01:56:37,297 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-21 01:56:37,297 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-21 01:56:37,297 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_mutex__one_thread_double_unlock [2021-11-21 01:56:37,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_mutex__one_thread_double_unlock [2021-11-21 01:56:37,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 01:56:37,298 INFO L130 BoogieDeclarations]: Found specification of procedure scanarg [2021-11-21 01:56:37,299 INFO L138 BoogieDeclarations]: Found implementation of procedure scanarg [2021-11-21 01:56:37,299 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-21 01:56:37,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-21 01:56:37,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 01:56:37,300 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_1 [2021-11-21 01:56:37,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_1 [2021-11-21 01:56:37,301 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2021-11-21 01:56:37,301 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_0 [2021-11-21 01:56:37,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_0 [2021-11-21 01:56:37,302 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_2 [2021-11-21 01:56:37,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_2 [2021-11-21 01:56:37,303 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_write_lock [2021-11-21 01:56:37,303 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_write_lock [2021-11-21 01:56:37,303 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2021-11-21 01:56:37,303 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2021-11-21 01:56:37,304 INFO L130 BoogieDeclarations]: Found specification of procedure bm_entry_write [2021-11-21 01:56:37,304 INFO L138 BoogieDeclarations]: Found implementation of procedure bm_entry_write [2021-11-21 01:56:37,305 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:56:37,305 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-21 01:56:37,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-21 01:56:37,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 01:56:37,305 INFO L130 BoogieDeclarations]: Found specification of procedure string_unescape_inplace [2021-11-21 01:56:37,306 INFO L138 BoogieDeclarations]: Found implementation of procedure string_unescape_inplace [2021-11-21 01:56:37,306 INFO L130 BoogieDeclarations]: Found specification of procedure default_llseek [2021-11-21 01:56:37,306 INFO L138 BoogieDeclarations]: Found implementation of procedure default_llseek [2021-11-21 01:56:37,306 INFO L130 BoogieDeclarations]: Found specification of procedure PTR_ERR [2021-11-21 01:56:37,306 INFO L138 BoogieDeclarations]: Found implementation of procedure PTR_ERR [2021-11-21 01:56:37,306 INFO L130 BoogieDeclarations]: Found specification of procedure bm_status_read [2021-11-21 01:56:37,307 INFO L138 BoogieDeclarations]: Found implementation of procedure bm_status_read [2021-11-21 01:56:37,307 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-21 01:56:37,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-21 01:56:37,307 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-21 01:56:37,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-21 01:56:37,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:56:37,309 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-21 01:56:37,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-21 01:56:37,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:56:37,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:56:37,311 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_i_mutex_of_inode [2021-11-21 01:56:37,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_i_mutex_of_inode [2021-11-21 01:56:37,313 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-11-21 01:56:37,313 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-11-21 01:56:37,975 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:56:37,980 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:56:38,247 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-21 01:56:40,203 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-21 01:56:40,258 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:56:40,743 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:56:40,743 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-21 01:56:40,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:56:40 BoogieIcfgContainer [2021-11-21 01:56:40,749 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:56:40,750 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:56:40,750 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:56:40,753 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:56:40,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:56:34" (1/3) ... [2021-11-21 01:56:40,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f3d6e17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:56:40, skipping insertion in model container [2021-11-21 01:56:40,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:56:36" (2/3) ... [2021-11-21 01:56:40,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f3d6e17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:56:40, skipping insertion in model container [2021-11-21 01:56:40,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:56:40" (3/3) ... [2021-11-21 01:56:40,756 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i [2021-11-21 01:56:40,761 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:56:40,762 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-21 01:56:40,822 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:56:40,828 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 01:56:40,829 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-21 01:56:40,866 INFO L276 IsEmpty]: Start isEmpty. Operand has 766 states, 476 states have (on average 1.3718487394957983) internal successors, (653), 483 states have internal predecessors, (653), 238 states have call successors, (238), 50 states have call predecessors, (238), 49 states have return successors, (231), 231 states have call predecessors, (231), 231 states have call successors, (231) [2021-11-21 01:56:40,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-11-21 01:56:40,902 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:56:40,903 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 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] [2021-11-21 01:56:40,904 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:56:40,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:56:40,910 INFO L85 PathProgramCache]: Analyzing trace with hash -505855976, now seen corresponding path program 1 times [2021-11-21 01:56:40,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:56:40,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932941409] [2021-11-21 01:56:40,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:56:40,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:56:41,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:56:41,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2259 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2259 trivial. 0 not checked. [2021-11-21 01:56:41,796 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:56:41,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932941409] [2021-11-21 01:56:41,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932941409] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:56:41,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:56:41,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:56:41,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445426964] [2021-11-21 01:56:41,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:56:41,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:56:41,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:56:41,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:56:41,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:56:41,844 INFO L87 Difference]: Start difference. First operand has 766 states, 476 states have (on average 1.3718487394957983) internal successors, (653), 483 states have internal predecessors, (653), 238 states have call successors, (238), 50 states have call predecessors, (238), 49 states have return successors, (231), 231 states have call predecessors, (231), 231 states have call successors, (231) Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2021-11-21 01:56:44,275 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:56:44,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:56:44,772 INFO L93 Difference]: Finished difference Result 2128 states and 3158 transitions. [2021-11-21 01:56:44,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:56:44,781 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) Word has length 265 [2021-11-21 01:56:44,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:56:44,807 INFO L225 Difference]: With dead ends: 2128 [2021-11-21 01:56:44,808 INFO L226 Difference]: Without dead ends: 1400 [2021-11-21 01:56:44,822 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 01:56:44,826 INFO L933 BasicCegarLoop]: 1141 mSDtfsCounter, 973 mSDsluCounter, 1064 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 973 SdHoareTripleChecker+Valid, 2058 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:56:44,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [973 Valid, 2058 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-21 01:56:44,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2021-11-21 01:56:45,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 1396. [2021-11-21 01:56:45,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1396 states, 886 states have (on average 1.3690744920993227) internal successors, (1213), 899 states have internal predecessors, (1213), 413 states have call successors, (413), 95 states have call predecessors, (413), 94 states have return successors, (409), 409 states have call predecessors, (409), 409 states have call successors, (409) [2021-11-21 01:56:45,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1396 states to 1396 states and 2035 transitions. [2021-11-21 01:56:45,056 INFO L78 Accepts]: Start accepts. Automaton has 1396 states and 2035 transitions. Word has length 265 [2021-11-21 01:56:45,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:56:45,063 INFO L470 AbstractCegarLoop]: Abstraction has 1396 states and 2035 transitions. [2021-11-21 01:56:45,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2021-11-21 01:56:45,067 INFO L276 IsEmpty]: Start isEmpty. Operand 1396 states and 2035 transitions. [2021-11-21 01:56:45,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2021-11-21 01:56:45,092 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:56:45,092 INFO L514 BasicCegarLoop]: trace histogram [28, 24, 24, 24, 24, 24, 24, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:56:45,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:56:45,093 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:56:45,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:56:45,096 INFO L85 PathProgramCache]: Analyzing trace with hash -592892162, now seen corresponding path program 1 times [2021-11-21 01:56:45,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:56:45,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937008634] [2021-11-21 01:56:45,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:56:45,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:56:45,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:56:45,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2446 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2446 trivial. 0 not checked. [2021-11-21 01:56:45,503 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:56:45,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937008634] [2021-11-21 01:56:45,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937008634] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:56:45,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:56:45,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:56:45,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847241116] [2021-11-21 01:56:45,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:56:45,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:56:45,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:56:45,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:56:45,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:56:45,510 INFO L87 Difference]: Start difference. First operand 1396 states and 2035 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-21 01:56:49,523 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:56:49,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:56:49,563 INFO L93 Difference]: Finished difference Result 1472 states and 2110 transitions. [2021-11-21 01:56:49,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:56:49,564 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 308 [2021-11-21 01:56:49,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:56:49,579 INFO L225 Difference]: With dead ends: 1472 [2021-11-21 01:56:49,579 INFO L226 Difference]: Without dead ends: 1470 [2021-11-21 01:56:49,581 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 01:56:49,582 INFO L933 BasicCegarLoop]: 940 mSDtfsCounter, 944 mSDsluCounter, 2308 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 946 SdHoareTripleChecker+Valid, 2904 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:56:49,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [946 Valid, 2904 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 514 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2021-11-21 01:56:49,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2021-11-21 01:56:49,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 1470. [2021-11-21 01:56:49,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1470 states, 925 states have (on average 1.3556756756756756) internal successors, (1254), 938 states have internal predecessors, (1254), 429 states have call successors, (429), 114 states have call predecessors, (429), 113 states have return successors, (425), 425 states have call predecessors, (425), 425 states have call successors, (425) [2021-11-21 01:56:49,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1470 states to 1470 states and 2108 transitions. [2021-11-21 01:56:49,696 INFO L78 Accepts]: Start accepts. Automaton has 1470 states and 2108 transitions. Word has length 308 [2021-11-21 01:56:49,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:56:49,698 INFO L470 AbstractCegarLoop]: Abstraction has 1470 states and 2108 transitions. [2021-11-21 01:56:49,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-21 01:56:49,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1470 states and 2108 transitions. [2021-11-21 01:56:49,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2021-11-21 01:56:49,709 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:56:49,710 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 5, 5, 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] [2021-11-21 01:56:49,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:56:49,710 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:56:49,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:56:49,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1192569740, now seen corresponding path program 1 times [2021-11-21 01:56:49,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:56:49,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107470084] [2021-11-21 01:56:49,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:56:49,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:56:49,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:56:49,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2295 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2295 trivial. 0 not checked. [2021-11-21 01:56:49,908 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:56:49,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107470084] [2021-11-21 01:56:49,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107470084] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:56:49,908 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:56:49,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:56:49,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787431873] [2021-11-21 01:56:49,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:56:49,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:56:49,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:56:49,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:56:49,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:56:49,911 INFO L87 Difference]: Start difference. First operand 1470 states and 2108 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) [2021-11-21 01:56:52,021 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:56:54,113 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:56:54,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:56:54,142 INFO L93 Difference]: Finished difference Result 3529 states and 5035 transitions. [2021-11-21 01:56:54,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:56:54,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) Word has length 320 [2021-11-21 01:56:54,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:56:54,161 INFO L225 Difference]: With dead ends: 3529 [2021-11-21 01:56:54,161 INFO L226 Difference]: Without dead ends: 2108 [2021-11-21 01:56:54,168 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 01:56:54,169 INFO L933 BasicCegarLoop]: 1112 mSDtfsCounter, 907 mSDsluCounter, 1053 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 907 SdHoareTripleChecker+Valid, 2019 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:56:54,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [907 Valid, 2019 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 354 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2021-11-21 01:56:54,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2021-11-21 01:56:54,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 2086. [2021-11-21 01:56:54,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2086 states, 1328 states have (on average 1.3539156626506024) internal successors, (1798), 1350 states have internal predecessors, (1798), 583 states have call successors, (583), 173 states have call predecessors, (583), 172 states have return successors, (579), 574 states have call predecessors, (579), 579 states have call successors, (579) [2021-11-21 01:56:54,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2086 states to 2086 states and 2960 transitions. [2021-11-21 01:56:54,295 INFO L78 Accepts]: Start accepts. Automaton has 2086 states and 2960 transitions. Word has length 320 [2021-11-21 01:56:54,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:56:54,296 INFO L470 AbstractCegarLoop]: Abstraction has 2086 states and 2960 transitions. [2021-11-21 01:56:54,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) [2021-11-21 01:56:54,296 INFO L276 IsEmpty]: Start isEmpty. Operand 2086 states and 2960 transitions. [2021-11-21 01:56:54,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2021-11-21 01:56:54,305 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:56:54,306 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:56:54,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 01:56:54,306 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:56:54,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:56:54,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1102531120, now seen corresponding path program 1 times [2021-11-21 01:56:54,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:56:54,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170752708] [2021-11-21 01:56:54,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:56:54,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:56:54,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:56:54,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2283 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2283 trivial. 0 not checked. [2021-11-21 01:56:54,536 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:56:54,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170752708] [2021-11-21 01:56:54,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170752708] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:56:54,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:56:54,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:56:54,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464090320] [2021-11-21 01:56:54,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:56:54,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:56:54,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:56:54,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:56:54,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:56:54,541 INFO L87 Difference]: Start difference. First operand 2086 states and 2960 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) [2021-11-21 01:56:56,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:56:56,241 INFO L93 Difference]: Finished difference Result 4855 states and 6836 transitions. [2021-11-21 01:56:56,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:56:56,241 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) Word has length 318 [2021-11-21 01:56:56,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:56:56,266 INFO L225 Difference]: With dead ends: 4855 [2021-11-21 01:56:56,267 INFO L226 Difference]: Without dead ends: 2818 [2021-11-21 01:56:56,275 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 01:56:56,276 INFO L933 BasicCegarLoop]: 1132 mSDtfsCounter, 709 mSDsluCounter, 1054 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 2039 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:56:56,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [709 Valid, 2039 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-21 01:56:56,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2818 states. [2021-11-21 01:56:56,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2818 to 2796. [2021-11-21 01:56:56,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2796 states, 1789 states have (on average 1.3387367244270543) internal successors, (2395), 1822 states have internal predecessors, (2395), 754 states have call successors, (754), 251 states have call predecessors, (754), 250 states have return successors, (750), 735 states have call predecessors, (750), 750 states have call successors, (750) [2021-11-21 01:56:56,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2796 states to 2796 states and 3899 transitions. [2021-11-21 01:56:56,448 INFO L78 Accepts]: Start accepts. Automaton has 2796 states and 3899 transitions. Word has length 318 [2021-11-21 01:56:56,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:56:56,448 INFO L470 AbstractCegarLoop]: Abstraction has 2796 states and 3899 transitions. [2021-11-21 01:56:56,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) [2021-11-21 01:56:56,449 INFO L276 IsEmpty]: Start isEmpty. Operand 2796 states and 3899 transitions. [2021-11-21 01:56:56,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2021-11-21 01:56:56,457 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:56:56,458 INFO L514 BasicCegarLoop]: trace histogram [28, 24, 24, 24, 24, 24, 24, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:56:56,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 01:56:56,458 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:56:56,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:56:56,459 INFO L85 PathProgramCache]: Analyzing trace with hash 825480228, now seen corresponding path program 1 times [2021-11-21 01:56:56,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:56:56,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844543675] [2021-11-21 01:56:56,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:56:56,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:56:56,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:56:56,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2448 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2446 trivial. 0 not checked. [2021-11-21 01:56:56,787 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:56:56,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844543675] [2021-11-21 01:56:56,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844543675] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:56:56,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:56:56,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:56:56,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8237673] [2021-11-21 01:56:56,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:56:56,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:56:56,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:56:56,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:56:56,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:56:56,790 INFO L87 Difference]: Start difference. First operand 2796 states and 3899 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-21 01:56:58,776 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:57:00,789 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:57:02,089 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:57:02,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:57:02,116 INFO L93 Difference]: Finished difference Result 2802 states and 3904 transitions. [2021-11-21 01:57:02,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:57:02,117 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 313 [2021-11-21 01:57:02,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:57:02,139 INFO L225 Difference]: With dead ends: 2802 [2021-11-21 01:57:02,140 INFO L226 Difference]: Without dead ends: 2798 [2021-11-21 01:57:02,141 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 01:57:02,142 INFO L933 BasicCegarLoop]: 935 mSDtfsCounter, 1018 mSDsluCounter, 2178 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1019 SdHoareTripleChecker+Valid, 2795 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:57:02,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1019 Valid, 2795 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 486 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2021-11-21 01:57:02,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2798 states. [2021-11-21 01:57:02,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2798 to 2798. [2021-11-21 01:57:02,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2798 states, 1791 states have (on average 1.3378001116694584) internal successors, (2396), 1823 states have internal predecessors, (2396), 754 states have call successors, (754), 252 states have call predecessors, (754), 250 states have return successors, (750), 735 states have call predecessors, (750), 750 states have call successors, (750) [2021-11-21 01:57:02,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2798 states to 2798 states and 3900 transitions. [2021-11-21 01:57:02,380 INFO L78 Accepts]: Start accepts. Automaton has 2798 states and 3900 transitions. Word has length 313 [2021-11-21 01:57:02,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:57:02,382 INFO L470 AbstractCegarLoop]: Abstraction has 2798 states and 3900 transitions. [2021-11-21 01:57:02,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-21 01:57:02,382 INFO L276 IsEmpty]: Start isEmpty. Operand 2798 states and 3900 transitions. [2021-11-21 01:57:02,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-11-21 01:57:02,391 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:57:02,391 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 5, 5, 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] [2021-11-21 01:57:02,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 01:57:02,392 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:57:02,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:57:02,393 INFO L85 PathProgramCache]: Analyzing trace with hash -645054574, now seen corresponding path program 1 times [2021-11-21 01:57:02,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:57:02,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880930241] [2021-11-21 01:57:02,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:57:02,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:57:02,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:57:02,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2295 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2295 trivial. 0 not checked. [2021-11-21 01:57:02,586 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:57:02,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880930241] [2021-11-21 01:57:02,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880930241] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:57:02,587 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:57:02,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:57:02,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835857679] [2021-11-21 01:57:02,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:57:02,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:57:02,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:57:02,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:57:02,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:57:02,589 INFO L87 Difference]: Start difference. First operand 2798 states and 3900 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2021-11-21 01:57:05,511 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:57:05,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:57:05,553 INFO L93 Difference]: Finished difference Result 7356 states and 10270 transitions. [2021-11-21 01:57:05,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:57:05,554 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) Word has length 322 [2021-11-21 01:57:05,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:57:05,589 INFO L225 Difference]: With dead ends: 7356 [2021-11-21 01:57:05,589 INFO L226 Difference]: Without dead ends: 4607 [2021-11-21 01:57:05,600 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 01:57:05,601 INFO L933 BasicCegarLoop]: 1209 mSDtfsCounter, 909 mSDsluCounter, 1053 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 2116 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:57:05,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [909 Valid, 2116 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-21 01:57:05,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4607 states. [2021-11-21 01:57:05,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4607 to 4583. [2021-11-21 01:57:05,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4583 states, 2973 states have (on average 1.3420787083753785) internal successors, (3990), 3034 states have internal predecessors, (3990), 1193 states have call successors, (1193), 416 states have call predecessors, (1193), 414 states have return successors, (1189), 1154 states have call predecessors, (1189), 1189 states have call successors, (1189) [2021-11-21 01:57:05,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4583 states to 4583 states and 6372 transitions. [2021-11-21 01:57:05,929 INFO L78 Accepts]: Start accepts. Automaton has 4583 states and 6372 transitions. Word has length 322 [2021-11-21 01:57:05,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:57:05,930 INFO L470 AbstractCegarLoop]: Abstraction has 4583 states and 6372 transitions. [2021-11-21 01:57:05,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2021-11-21 01:57:05,931 INFO L276 IsEmpty]: Start isEmpty. Operand 4583 states and 6372 transitions. [2021-11-21 01:57:05,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2021-11-21 01:57:05,938 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:57:05,938 INFO L514 BasicCegarLoop]: trace histogram [28, 24, 24, 24, 24, 24, 24, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:57:05,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 01:57:05,939 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:57:05,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:57:05,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1340160412, now seen corresponding path program 1 times [2021-11-21 01:57:05,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:57:05,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956194765] [2021-11-21 01:57:05,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:57:05,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:57:06,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:57:06,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2455 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2451 trivial. 0 not checked. [2021-11-21 01:57:06,212 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:57:06,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956194765] [2021-11-21 01:57:06,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956194765] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:57:06,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:57:06,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:57:06,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935487282] [2021-11-21 01:57:06,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:57:06,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:57:06,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:57:06,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:57:06,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:57:06,215 INFO L87 Difference]: Start difference. First operand 4583 states and 6372 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2021-11-21 01:57:09,244 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:57:09,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:57:09,318 INFO L93 Difference]: Finished difference Result 4741 states and 6549 transitions. [2021-11-21 01:57:09,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:57:09,318 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) Word has length 319 [2021-11-21 01:57:09,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:57:09,350 INFO L225 Difference]: With dead ends: 4741 [2021-11-21 01:57:09,350 INFO L226 Difference]: Without dead ends: 4651 [2021-11-21 01:57:09,353 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 01:57:09,354 INFO L933 BasicCegarLoop]: 941 mSDtfsCounter, 1013 mSDsluCounter, 2233 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1015 SdHoareTripleChecker+Valid, 2847 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:57:09,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1015 Valid, 2847 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 490 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2021-11-21 01:57:09,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4651 states. [2021-11-21 01:57:09,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4651 to 4637. [2021-11-21 01:57:09,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4637 states, 3028 states have (on average 1.333223249669749) internal successors, (4037), 3069 states have internal predecessors, (4037), 1171 states have call successors, (1171), 436 states have call predecessors, (1171), 436 states have return successors, (1171), 1153 states have call predecessors, (1171), 1171 states have call successors, (1171) [2021-11-21 01:57:09,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4637 states to 4637 states and 6379 transitions. [2021-11-21 01:57:09,690 INFO L78 Accepts]: Start accepts. Automaton has 4637 states and 6379 transitions. Word has length 319 [2021-11-21 01:57:09,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:57:09,691 INFO L470 AbstractCegarLoop]: Abstraction has 4637 states and 6379 transitions. [2021-11-21 01:57:09,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2021-11-21 01:57:09,691 INFO L276 IsEmpty]: Start isEmpty. Operand 4637 states and 6379 transitions. [2021-11-21 01:57:09,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2021-11-21 01:57:09,709 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:57:09,710 INFO L514 BasicCegarLoop]: trace histogram [29, 24, 24, 24, 24, 24, 24, 9, 9, 3, 3, 3, 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] [2021-11-21 01:57:09,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 01:57:09,710 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:57:09,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:57:09,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1730028146, now seen corresponding path program 1 times [2021-11-21 01:57:09,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:57:09,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068415438] [2021-11-21 01:57:09,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:57:09,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:57:09,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:57:09,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2594 trivial. 0 not checked. [2021-11-21 01:57:09,898 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:57:09,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068415438] [2021-11-21 01:57:09,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068415438] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:57:09,898 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:57:09,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:57:09,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575615944] [2021-11-21 01:57:09,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:57:09,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:57:09,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:57:09,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:57:09,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:57:09,900 INFO L87 Difference]: Start difference. First operand 4637 states and 6379 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) [2021-11-21 01:57:11,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:57:11,696 INFO L93 Difference]: Finished difference Result 11027 states and 15188 transitions. [2021-11-21 01:57:11,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:57:11,696 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) Word has length 381 [2021-11-21 01:57:11,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:57:11,746 INFO L225 Difference]: With dead ends: 11027 [2021-11-21 01:57:11,746 INFO L226 Difference]: Without dead ends: 6646 [2021-11-21 01:57:11,764 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 01:57:11,765 INFO L933 BasicCegarLoop]: 1280 mSDtfsCounter, 886 mSDsluCounter, 1012 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 2148 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:57:11,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [886 Valid, 2148 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-21 01:57:11,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6646 states. [2021-11-21 01:57:12,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6646 to 6640. [2021-11-21 01:57:12,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6640 states, 4347 states have (on average 1.3340234644582472) internal successors, (5799), 4407 states have internal predecessors, (5799), 1658 states have call successors, (1658), 633 states have call predecessors, (1658), 633 states have return successors, (1658), 1630 states have call predecessors, (1658), 1658 states have call successors, (1658) [2021-11-21 01:57:12,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6640 states to 6640 states and 9115 transitions. [2021-11-21 01:57:12,204 INFO L78 Accepts]: Start accepts. Automaton has 6640 states and 9115 transitions. Word has length 381 [2021-11-21 01:57:12,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:57:12,205 INFO L470 AbstractCegarLoop]: Abstraction has 6640 states and 9115 transitions. [2021-11-21 01:57:12,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) [2021-11-21 01:57:12,206 INFO L276 IsEmpty]: Start isEmpty. Operand 6640 states and 9115 transitions. [2021-11-21 01:57:12,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2021-11-21 01:57:12,215 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:57:12,215 INFO L514 BasicCegarLoop]: trace histogram [29, 24, 24, 24, 24, 24, 24, 8, 8, 3, 3, 3, 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] [2021-11-21 01:57:12,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 01:57:12,216 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:57:12,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:57:12,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1446105546, now seen corresponding path program 1 times [2021-11-21 01:57:12,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:57:12,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140986796] [2021-11-21 01:57:12,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:57:12,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:57:12,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:57:12,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2577 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2570 trivial. 0 not checked. [2021-11-21 01:57:12,390 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:57:12,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140986796] [2021-11-21 01:57:12,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140986796] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:57:12,391 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:57:12,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:57:12,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861630257] [2021-11-21 01:57:12,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:57:12,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:57:12,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:57:12,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:57:12,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:57:12,393 INFO L87 Difference]: Start difference. First operand 6640 states and 9115 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, (44), 2 states have call predecessors, (44), 1 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) [2021-11-21 01:57:14,896 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:57:15,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:57:15,765 INFO L93 Difference]: Finished difference Result 15271 states and 20966 transitions. [2021-11-21 01:57:15,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:57:15,765 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, (44), 2 states have call predecessors, (44), 1 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) Word has length 379 [2021-11-21 01:57:15,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:57:15,804 INFO L225 Difference]: With dead ends: 15271 [2021-11-21 01:57:15,805 INFO L226 Difference]: Without dead ends: 8887 [2021-11-21 01:57:15,827 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 01:57:15,828 INFO L933 BasicCegarLoop]: 1266 mSDtfsCounter, 688 mSDsluCounter, 1013 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 2134 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:57:15,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [688 Valid, 2134 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-21 01:57:15,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8887 states. [2021-11-21 01:57:16,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8887 to 8881. [2021-11-21 01:57:16,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8881 states, 5841 states have (on average 1.3307652799178222) internal successors, (7773), 5920 states have internal predecessors, (7773), 2183 states have call successors, (2183), 855 states have call predecessors, (2183), 855 states have return successors, (2183), 2143 states have call predecessors, (2183), 2183 states have call successors, (2183) [2021-11-21 01:57:16,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8881 states to 8881 states and 12139 transitions. [2021-11-21 01:57:16,297 INFO L78 Accepts]: Start accepts. Automaton has 8881 states and 12139 transitions. Word has length 379 [2021-11-21 01:57:16,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:57:16,298 INFO L470 AbstractCegarLoop]: Abstraction has 8881 states and 12139 transitions. [2021-11-21 01:57:16,298 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, (44), 2 states have call predecessors, (44), 1 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) [2021-11-21 01:57:16,298 INFO L276 IsEmpty]: Start isEmpty. Operand 8881 states and 12139 transitions. [2021-11-21 01:57:16,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2021-11-21 01:57:16,306 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:57:16,307 INFO L514 BasicCegarLoop]: trace histogram [29, 24, 24, 24, 24, 24, 24, 9, 9, 3, 3, 3, 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] [2021-11-21 01:57:16,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-21 01:57:16,307 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:57:16,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:57:16,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1746507220, now seen corresponding path program 1 times [2021-11-21 01:57:16,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:57:16,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845984069] [2021-11-21 01:57:16,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:57:16,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:57:16,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:57:16,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2594 trivial. 0 not checked. [2021-11-21 01:57:16,566 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:57:16,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845984069] [2021-11-21 01:57:16,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845984069] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:57:16,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:57:16,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:57:16,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748162119] [2021-11-21 01:57:16,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:57:16,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:57:16,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:57:16,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:57:16,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:57:16,569 INFO L87 Difference]: Start difference. First operand 8881 states and 12139 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (43), 3 states have call predecessors, (43), 3 states have call successors, (43) [2021-11-21 01:57:19,933 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:57:20,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:57:20,081 INFO L93 Difference]: Finished difference Result 21160 states and 28999 transitions. [2021-11-21 01:57:20,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:57:20,082 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (43), 3 states have call predecessors, (43), 3 states have call successors, (43) Word has length 383 [2021-11-21 01:57:20,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:57:20,135 INFO L225 Difference]: With dead ends: 21160 [2021-11-21 01:57:20,136 INFO L226 Difference]: Without dead ends: 12535 [2021-11-21 01:57:20,162 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 01:57:20,163 INFO L933 BasicCegarLoop]: 1323 mSDtfsCounter, 887 mSDsluCounter, 1011 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 889 SdHoareTripleChecker+Valid, 2191 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:57:20,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [889 Valid, 2191 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 426 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2021-11-21 01:57:20,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12535 states. [2021-11-21 01:57:20,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12535 to 12526. [2021-11-21 01:57:20,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12526 states, 8286 states have (on average 1.3326092203717113) internal successors, (11042), 8402 states have internal predecessors, (11042), 3035 states have call successors, (3035), 1203 states have call predecessors, (3035), 1203 states have return successors, (3041), 2974 states have call predecessors, (3041), 3035 states have call successors, (3041) [2021-11-21 01:57:20,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12526 states to 12526 states and 17118 transitions. [2021-11-21 01:57:20,854 INFO L78 Accepts]: Start accepts. Automaton has 12526 states and 17118 transitions. Word has length 383 [2021-11-21 01:57:20,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:57:20,854 INFO L470 AbstractCegarLoop]: Abstraction has 12526 states and 17118 transitions. [2021-11-21 01:57:20,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (43), 3 states have call predecessors, (43), 3 states have call successors, (43) [2021-11-21 01:57:20,855 INFO L276 IsEmpty]: Start isEmpty. Operand 12526 states and 17118 transitions. [2021-11-21 01:57:20,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2021-11-21 01:57:20,871 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:57:20,871 INFO L514 BasicCegarLoop]: trace histogram [32, 24, 24, 24, 24, 24, 24, 12, 12, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 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] [2021-11-21 01:57:20,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-21 01:57:20,872 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:57:20,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:57:20,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1913308171, now seen corresponding path program 1 times [2021-11-21 01:57:20,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:57:20,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409243743] [2021-11-21 01:57:20,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:57:20,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:57:20,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:57:21,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2936 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2936 trivial. 0 not checked. [2021-11-21 01:57:21,232 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:57:21,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409243743] [2021-11-21 01:57:21,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409243743] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:57:21,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:57:21,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:57:21,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460115892] [2021-11-21 01:57:21,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:57:21,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:57:21,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:57:21,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:57:21,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:57:21,235 INFO L87 Difference]: Start difference. First operand 12526 states and 17118 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 3 states have call successors, (47), 2 states have call predecessors, (47), 1 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2021-11-21 01:57:25,239 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:57:25,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:57:25,843 INFO L93 Difference]: Finished difference Result 30203 states and 42499 transitions. [2021-11-21 01:57:25,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:57:25,844 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 3 states have call successors, (47), 2 states have call predecessors, (47), 1 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) Word has length 438 [2021-11-21 01:57:25,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:57:25,920 INFO L225 Difference]: With dead ends: 30203 [2021-11-21 01:57:25,921 INFO L226 Difference]: Without dead ends: 17933 [2021-11-21 01:57:25,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:57:25,960 INFO L933 BasicCegarLoop]: 1229 mSDtfsCounter, 1362 mSDsluCounter, 1155 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 122 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1362 SdHoareTripleChecker+Valid, 2228 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:57:25,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1362 Valid, 2228 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 510 Invalid, 1 Unknown, 0 Unchecked, 3.6s Time] [2021-11-21 01:57:25,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17933 states. [2021-11-21 01:57:26,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17933 to 12126. [2021-11-21 01:57:26,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12126 states, 8048 states have (on average 1.3312624254473162) internal successors, (10714), 8146 states have internal predecessors, (10714), 2899 states have call successors, (2899), 1177 states have call predecessors, (2899), 1177 states have return successors, (2902), 2838 states have call predecessors, (2902), 2899 states have call successors, (2902) [2021-11-21 01:57:26,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12126 states to 12126 states and 16515 transitions. [2021-11-21 01:57:26,762 INFO L78 Accepts]: Start accepts. Automaton has 12126 states and 16515 transitions. Word has length 438 [2021-11-21 01:57:26,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:57:26,842 INFO L470 AbstractCegarLoop]: Abstraction has 12126 states and 16515 transitions. [2021-11-21 01:57:26,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 3 states have call successors, (47), 2 states have call predecessors, (47), 1 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2021-11-21 01:57:26,842 INFO L276 IsEmpty]: Start isEmpty. Operand 12126 states and 16515 transitions. [2021-11-21 01:57:26,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2021-11-21 01:57:26,859 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:57:26,860 INFO L514 BasicCegarLoop]: trace histogram [32, 24, 24, 24, 24, 24, 24, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 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] [2021-11-21 01:57:26,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-21 01:57:26,861 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:57:26,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:57:26,862 INFO L85 PathProgramCache]: Analyzing trace with hash 553286735, now seen corresponding path program 1 times [2021-11-21 01:57:26,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:57:26,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974813731] [2021-11-21 01:57:26,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:57:26,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:57:26,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:57:27,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2973 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2970 trivial. 0 not checked. [2021-11-21 01:57:27,111 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:57:27,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974813731] [2021-11-21 01:57:27,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974813731] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:57:27,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701405493] [2021-11-21 01:57:27,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:57:27,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:57:27,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f61cd23f-6157-49ce-b67f-cd92bcc7377a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:57:27,117 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f61cd23f-6157-49ce-b67f-cd92bcc7377a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:57:27,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f61cd23f-6157-49ce-b67f-cd92bcc7377a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:57:27,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:57:27,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 2880 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:57:27,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:57:28,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2973 backedges. 239 proven. 0 refuted. 0 times theorem prover too weak. 2734 trivial. 0 not checked. [2021-11-21 01:57:28,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:57:28,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701405493] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:57:28,815 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:57:28,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-21 01:57:28,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011480591] [2021-11-21 01:57:28,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:57:28,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:57:28,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:57:28,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:57:28,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:57:28,818 INFO L87 Difference]: Start difference. First operand 12126 states and 16515 transitions. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 3 states have call successors, (52), 3 states have call predecessors, (52), 3 states have return successors, (49), 3 states have call predecessors, (49), 3 states have call successors, (49) [2021-11-21 01:57:32,046 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:57:34,448 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:57:34,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:57:34,754 INFO L93 Difference]: Finished difference Result 27708 states and 37713 transitions. [2021-11-21 01:57:34,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:57:34,755 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 3 states have call successors, (52), 3 states have call predecessors, (52), 3 states have return successors, (49), 3 states have call predecessors, (49), 3 states have call successors, (49) Word has length 441 [2021-11-21 01:57:34,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:57:34,816 INFO L225 Difference]: With dead ends: 27708 [2021-11-21 01:57:34,816 INFO L226 Difference]: Without dead ends: 15838 [2021-11-21 01:57:34,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:57:34,841 INFO L933 BasicCegarLoop]: 1593 mSDtfsCounter, 859 mSDsluCounter, 2507 mSDsCounter, 0 mSdLazyCounter, 1122 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 859 SdHoareTripleChecker+Valid, 3680 SdHoareTripleChecker+Invalid, 1133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1122 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:57:34,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [859 Valid, 3680 Invalid, 1133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1122 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2021-11-21 01:57:34,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15838 states. [2021-11-21 01:57:35,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15838 to 15832. [2021-11-21 01:57:35,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15832 states, 10524 states have (on average 1.330577727099962) internal successors, (14003), 10649 states have internal predecessors, (14003), 3735 states have call successors, (3735), 1571 states have call predecessors, (3735), 1571 states have return successors, (3739), 3653 states have call predecessors, (3739), 3735 states have call successors, (3739) [2021-11-21 01:57:35,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15832 states to 15832 states and 21477 transitions. [2021-11-21 01:57:35,645 INFO L78 Accepts]: Start accepts. Automaton has 15832 states and 21477 transitions. Word has length 441 [2021-11-21 01:57:35,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:57:35,646 INFO L470 AbstractCegarLoop]: Abstraction has 15832 states and 21477 transitions. [2021-11-21 01:57:35,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 3 states have call successors, (52), 3 states have call predecessors, (52), 3 states have return successors, (49), 3 states have call predecessors, (49), 3 states have call successors, (49) [2021-11-21 01:57:35,646 INFO L276 IsEmpty]: Start isEmpty. Operand 15832 states and 21477 transitions. [2021-11-21 01:57:35,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2021-11-21 01:57:35,662 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:57:35,662 INFO L514 BasicCegarLoop]: trace histogram [32, 24, 24, 24, 24, 24, 24, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-21 01:57:35,703 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f61cd23f-6157-49ce-b67f-cd92bcc7377a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-21 01:57:35,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f61cd23f-6157-49ce-b67f-cd92bcc7377a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:57:35,890 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:57:35,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:57:35,890 INFO L85 PathProgramCache]: Analyzing trace with hash 2105250112, now seen corresponding path program 1 times [2021-11-21 01:57:35,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:57:35,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064022690] [2021-11-21 01:57:35,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:57:35,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:57:35,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:57:36,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2971 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 2952 trivial. 0 not checked. [2021-11-21 01:57:36,101 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:57:36,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064022690] [2021-11-21 01:57:36,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064022690] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:57:36,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:57:36,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:57:36,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264918306] [2021-11-21 01:57:36,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:57:36,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:57:36,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:57:36,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:57:36,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:57:36,104 INFO L87 Difference]: Start difference. First operand 15832 states and 21477 transitions. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 3 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (47), 3 states have call predecessors, (47), 3 states have call successors, (47) [2021-11-21 01:57:40,029 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:57:42,148 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:57:43,852 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:57:45,871 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:57:45,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:57:45,940 INFO L93 Difference]: Finished difference Result 36224 states and 49103 transitions. [2021-11-21 01:57:45,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:57:45,952 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 3 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (47), 3 states have call predecessors, (47), 3 states have call successors, (47) Word has length 441 [2021-11-21 01:57:45,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:57:46,162 INFO L225 Difference]: With dead ends: 36224 [2021-11-21 01:57:46,163 INFO L226 Difference]: Without dead ends: 20648 [2021-11-21 01:57:46,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:57:46,191 INFO L933 BasicCegarLoop]: 1590 mSDtfsCounter, 867 mSDsluCounter, 2511 mSDsCounter, 0 mSdLazyCounter, 1126 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 867 SdHoareTripleChecker+Valid, 3678 SdHoareTripleChecker+Invalid, 1138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1126 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:57:46,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [867 Valid, 3678 Invalid, 1138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1126 Invalid, 2 Unknown, 0 Unchecked, 9.2s Time] [2021-11-21 01:57:46,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20648 states. [2021-11-21 01:57:47,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20648 to 20642. [2021-11-21 01:57:47,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20642 states, 13745 states have (on average 1.3300836667879228) internal successors, (18282), 13908 states have internal predecessors, (18282), 4799 states have call successors, (4799), 2096 states have call predecessors, (4799), 2096 states have return successors, (4803), 4689 states have call predecessors, (4803), 4799 states have call successors, (4803) [2021-11-21 01:57:47,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20642 states to 20642 states and 27884 transitions. [2021-11-21 01:57:47,338 INFO L78 Accepts]: Start accepts. Automaton has 20642 states and 27884 transitions. Word has length 441 [2021-11-21 01:57:47,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:57:47,340 INFO L470 AbstractCegarLoop]: Abstraction has 20642 states and 27884 transitions. [2021-11-21 01:57:47,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 3 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (47), 3 states have call predecessors, (47), 3 states have call successors, (47) [2021-11-21 01:57:47,340 INFO L276 IsEmpty]: Start isEmpty. Operand 20642 states and 27884 transitions. [2021-11-21 01:57:47,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2021-11-21 01:57:47,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:57:47,365 INFO L514 BasicCegarLoop]: trace histogram [32, 24, 24, 24, 24, 24, 24, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 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] [2021-11-21 01:57:47,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-21 01:57:47,366 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:57:47,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:57:47,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1136205252, now seen corresponding path program 1 times [2021-11-21 01:57:47,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:57:47,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621045776] [2021-11-21 01:57:47,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:57:47,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:57:47,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:57:47,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2980 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 2960 trivial. 0 not checked. [2021-11-21 01:57:47,627 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:57:47,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621045776] [2021-11-21 01:57:47,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621045776] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:57:47,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:57:47,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:57:47,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732577233] [2021-11-21 01:57:47,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:57:47,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:57:47,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:57:47,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:57:47,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:57:47,631 INFO L87 Difference]: Start difference. First operand 20642 states and 27884 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 3 states have call successors, (51), 2 states have call predecessors, (51), 1 states have return successors, (48), 3 states have call predecessors, (48), 3 states have call successors, (48) [2021-11-21 01:57:51,282 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:57:54,091 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:57:54,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:57:54,295 INFO L93 Difference]: Finished difference Result 46379 states and 62608 transitions. [2021-11-21 01:57:54,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:57:54,295 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 3 states have call successors, (51), 2 states have call predecessors, (51), 1 states have return successors, (48), 3 states have call predecessors, (48), 3 states have call successors, (48) Word has length 445 [2021-11-21 01:57:54,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:57:54,390 INFO L225 Difference]: With dead ends: 46379 [2021-11-21 01:57:54,390 INFO L226 Difference]: Without dead ends: 25993 [2021-11-21 01:57:54,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:57:54,432 INFO L933 BasicCegarLoop]: 1454 mSDtfsCounter, 712 mSDsluCounter, 2403 mSDsCounter, 0 mSdLazyCounter, 1057 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 3446 SdHoareTripleChecker+Invalid, 1068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1057 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:57:54,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [712 Valid, 3446 Invalid, 1068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1057 Invalid, 1 Unknown, 0 Unchecked, 5.7s Time] [2021-11-21 01:57:54,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25993 states. [2021-11-21 01:57:55,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25993 to 25987. [2021-11-21 01:57:55,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25987 states, 17358 states have (on average 1.3281484041940315) internal successors, (23054), 17565 states have internal predecessors, (23054), 5948 states have call successors, (5948), 2679 states have call predecessors, (5948), 2679 states have return successors, (5952), 5806 states have call predecessors, (5952), 5948 states have call successors, (5952) [2021-11-21 01:57:55,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25987 states to 25987 states and 34954 transitions. [2021-11-21 01:57:55,917 INFO L78 Accepts]: Start accepts. Automaton has 25987 states and 34954 transitions. Word has length 445 [2021-11-21 01:57:55,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:57:55,918 INFO L470 AbstractCegarLoop]: Abstraction has 25987 states and 34954 transitions. [2021-11-21 01:57:55,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 3 states have call successors, (51), 2 states have call predecessors, (51), 1 states have return successors, (48), 3 states have call predecessors, (48), 3 states have call successors, (48) [2021-11-21 01:57:55,918 INFO L276 IsEmpty]: Start isEmpty. Operand 25987 states and 34954 transitions. [2021-11-21 01:57:55,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2021-11-21 01:57:55,950 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:57:55,951 INFO L514 BasicCegarLoop]: trace histogram [34, 24, 24, 24, 24, 24, 24, 14, 14, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:57:55,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-21 01:57:55,951 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:57:55,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:57:55,952 INFO L85 PathProgramCache]: Analyzing trace with hash 79342962, now seen corresponding path program 1 times [2021-11-21 01:57:55,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:57:55,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124713716] [2021-11-21 01:57:55,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:57:55,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:57:56,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:57:56,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3181 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3175 trivial. 0 not checked. [2021-11-21 01:57:56,363 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:57:56,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124713716] [2021-11-21 01:57:56,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124713716] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:57:56,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083732351] [2021-11-21 01:57:56,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:57:56,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:57:56,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f61cd23f-6157-49ce-b67f-cd92bcc7377a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:57:56,365 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f61cd23f-6157-49ce-b67f-cd92bcc7377a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:57:56,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f61cd23f-6157-49ce-b67f-cd92bcc7377a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:57:57,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:57:57,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 2976 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:57:57,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:57:58,054 INFO L134 CoverageAnalysis]: Checked inductivity of 3181 backedges. 273 proven. 0 refuted. 0 times theorem prover too weak. 2908 trivial. 0 not checked. [2021-11-21 01:57:58,055 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:57:58,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083732351] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:57:58,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:57:58,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-21 01:57:58,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816594018] [2021-11-21 01:57:58,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:57:58,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:57:58,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:57:58,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:57:58,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:57:58,061 INFO L87 Difference]: Start difference. First operand 25987 states and 34954 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 3 states have call successors, (55), 3 states have call predecessors, (55), 3 states have return successors, (52), 3 states have call predecessors, (52), 3 states have call successors, (52) [2021-11-21 01:58:02,196 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:58:04,158 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:58:06,219 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:58:06,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:58:06,960 INFO L93 Difference]: Finished difference Result 57766 states and 77734 transitions. [2021-11-21 01:58:06,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:58:06,961 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 3 states have call successors, (55), 3 states have call predecessors, (55), 3 states have return successors, (52), 3 states have call predecessors, (52), 3 states have call successors, (52) Word has length 476 [2021-11-21 01:58:06,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:58:07,087 INFO L225 Difference]: With dead ends: 57766 [2021-11-21 01:58:07,087 INFO L226 Difference]: Without dead ends: 32035 [2021-11-21 01:58:07,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 476 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:58:07,157 INFO L933 BasicCegarLoop]: 1586 mSDtfsCounter, 848 mSDsluCounter, 2519 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 3683 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:58:07,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [848 Valid, 3683 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1125 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2021-11-21 01:58:07,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32035 states. [2021-11-21 01:58:08,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32035 to 32029. [2021-11-21 01:58:08,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32029 states, 21450 states have (on average 1.328997668997669) internal successors, (28507), 21701 states have internal predecessors, (28507), 7257 states have call successors, (7257), 3320 states have call predecessors, (7257), 3320 states have return successors, (7262), 7079 states have call predecessors, (7262), 7257 states have call successors, (7262) [2021-11-21 01:58:08,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32029 states to 32029 states and 43026 transitions. [2021-11-21 01:58:08,825 INFO L78 Accepts]: Start accepts. Automaton has 32029 states and 43026 transitions. Word has length 476 [2021-11-21 01:58:08,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:58:08,826 INFO L470 AbstractCegarLoop]: Abstraction has 32029 states and 43026 transitions. [2021-11-21 01:58:08,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 3 states have call successors, (55), 3 states have call predecessors, (55), 3 states have return successors, (52), 3 states have call predecessors, (52), 3 states have call successors, (52) [2021-11-21 01:58:08,826 INFO L276 IsEmpty]: Start isEmpty. Operand 32029 states and 43026 transitions. [2021-11-21 01:58:08,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2021-11-21 01:58:08,855 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:58:08,856 INFO L514 BasicCegarLoop]: trace histogram [34, 24, 24, 24, 24, 24, 24, 14, 14, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:58:08,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f61cd23f-6157-49ce-b67f-cd92bcc7377a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:58:09,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f61cd23f-6157-49ce-b67f-cd92bcc7377a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:58:09,082 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:58:09,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:58:09,082 INFO L85 PathProgramCache]: Analyzing trace with hash 406854811, now seen corresponding path program 1 times [2021-11-21 01:58:09,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:58:09,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383949360] [2021-11-21 01:58:09,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:58:09,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:58:09,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:58:09,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3175 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3175 trivial. 0 not checked. [2021-11-21 01:58:09,294 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:58:09,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383949360] [2021-11-21 01:58:09,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383949360] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:58:09,295 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:58:09,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:58:09,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565529222] [2021-11-21 01:58:09,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:58:09,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:58:09,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:58:09,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:58:09,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:58:09,297 INFO L87 Difference]: Start difference. First operand 32029 states and 43026 transitions. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (52), 2 states have call predecessors, (52), 2 states have return successors, (49), 3 states have call predecessors, (49), 2 states have call successors, (49) [2021-11-21 01:58:12,820 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:58:13,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:58:13,150 INFO L93 Difference]: Finished difference Result 63986 states and 85974 transitions. [2021-11-21 01:58:13,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:58:13,168 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (52), 2 states have call predecessors, (52), 2 states have return successors, (49), 3 states have call predecessors, (49), 2 states have call successors, (49) Word has length 474 [2021-11-21 01:58:13,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:58:13,398 INFO L225 Difference]: With dead ends: 63986 [2021-11-21 01:58:13,398 INFO L226 Difference]: Without dead ends: 32213 [2021-11-21 01:58:13,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:58:13,445 INFO L933 BasicCegarLoop]: 888 mSDtfsCounter, 2 mSDsluCounter, 3125 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3549 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:58:13,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3549 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-21 01:58:13,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32213 states. [2021-11-21 01:58:14,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32213 to 32149. [2021-11-21 01:58:15,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32149 states, 21550 states have (on average 1.3274709976798145) internal successors, (28607), 21801 states have internal predecessors, (28607), 7257 states have call successors, (7257), 3320 states have call predecessors, (7257), 3340 states have return successors, (7286), 7099 states have call predecessors, (7286), 7257 states have call successors, (7286) [2021-11-21 01:58:15,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32149 states to 32149 states and 43150 transitions. [2021-11-21 01:58:15,124 INFO L78 Accepts]: Start accepts. Automaton has 32149 states and 43150 transitions. Word has length 474 [2021-11-21 01:58:15,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:58:15,125 INFO L470 AbstractCegarLoop]: Abstraction has 32149 states and 43150 transitions. [2021-11-21 01:58:15,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (52), 2 states have call predecessors, (52), 2 states have return successors, (49), 3 states have call predecessors, (49), 2 states have call successors, (49) [2021-11-21 01:58:15,125 INFO L276 IsEmpty]: Start isEmpty. Operand 32149 states and 43150 transitions. [2021-11-21 01:58:15,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2021-11-21 01:58:15,154 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:58:15,154 INFO L514 BasicCegarLoop]: trace histogram [34, 24, 24, 24, 24, 24, 24, 14, 14, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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, 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 01:58:15,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-21 01:58:15,155 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:58:15,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:58:15,155 INFO L85 PathProgramCache]: Analyzing trace with hash 676425627, now seen corresponding path program 1 times [2021-11-21 01:58:15,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:58:15,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123444897] [2021-11-21 01:58:15,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:58:15,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:58:15,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:58:15,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3175 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3175 trivial. 0 not checked. [2021-11-21 01:58:15,378 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:58:15,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123444897] [2021-11-21 01:58:15,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123444897] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:58:15,378 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:58:15,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:58:15,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451091433] [2021-11-21 01:58:15,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:58:15,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:58:15,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:58:15,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:58:15,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:58:15,381 INFO L87 Difference]: Start difference. First operand 32149 states and 43150 transitions. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (52), 2 states have call predecessors, (52), 2 states have return successors, (49), 3 states have call predecessors, (49), 2 states have call successors, (49) [2021-11-21 01:58:19,678 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:58:20,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:58:20,191 INFO L93 Difference]: Finished difference Result 64246 states and 86242 transitions. [2021-11-21 01:58:20,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:58:20,197 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (52), 2 states have call predecessors, (52), 2 states have return successors, (49), 3 states have call predecessors, (49), 2 states have call successors, (49) Word has length 475 [2021-11-21 01:58:20,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:58:20,305 INFO L225 Difference]: With dead ends: 64246 [2021-11-21 01:58:20,305 INFO L226 Difference]: Without dead ends: 32353 [2021-11-21 01:58:20,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:58:20,369 INFO L933 BasicCegarLoop]: 894 mSDtfsCounter, 4 mSDsluCounter, 3135 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 3567 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:58:20,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 3567 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 642 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2021-11-21 01:58:20,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32353 states. [2021-11-21 01:58:22,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32353 to 32249. [2021-11-21 01:58:22,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32249 states, 21630 states have (on average 1.3281091077207583) internal successors, (28727), 21881 states have internal predecessors, (28727), 7257 states have call successors, (7257), 3320 states have call predecessors, (7257), 3360 states have return successors, (7310), 7119 states have call predecessors, (7310), 7257 states have call successors, (7310) [2021-11-21 01:58:22,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32249 states to 32249 states and 43294 transitions. [2021-11-21 01:58:22,158 INFO L78 Accepts]: Start accepts. Automaton has 32249 states and 43294 transitions. Word has length 475 [2021-11-21 01:58:22,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:58:22,159 INFO L470 AbstractCegarLoop]: Abstraction has 32249 states and 43294 transitions. [2021-11-21 01:58:22,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (52), 2 states have call predecessors, (52), 2 states have return successors, (49), 3 states have call predecessors, (49), 2 states have call successors, (49) [2021-11-21 01:58:22,159 INFO L276 IsEmpty]: Start isEmpty. Operand 32249 states and 43294 transitions. [2021-11-21 01:58:22,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2021-11-21 01:58:22,179 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:58:22,179 INFO L514 BasicCegarLoop]: trace histogram [34, 24, 24, 24, 24, 24, 24, 14, 14, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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, 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 01:58:22,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-21 01:58:22,180 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:58:22,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:58:22,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1367176333, now seen corresponding path program 1 times [2021-11-21 01:58:22,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:58:22,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645037728] [2021-11-21 01:58:22,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:58:22,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:58:22,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:58:22,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3186 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 3152 trivial. 0 not checked. [2021-11-21 01:58:22,380 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:58:22,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645037728] [2021-11-21 01:58:22,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645037728] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:58:22,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:58:22,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:58:22,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86000815] [2021-11-21 01:58:22,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:58:22,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:58:22,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:58:22,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:58:22,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:58:22,385 INFO L87 Difference]: Start difference. First operand 32249 states and 43294 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 3 states have call successors, (54), 2 states have call predecessors, (54), 1 states have return successors, (51), 3 states have call predecessors, (51), 3 states have call successors, (51) [2021-11-21 01:58:27,154 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:58:27,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:58:27,566 INFO L93 Difference]: Finished difference Result 70977 states and 95276 transitions. [2021-11-21 01:58:27,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:58:27,578 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 3 states have call successors, (54), 2 states have call predecessors, (54), 1 states have return successors, (51), 3 states have call predecessors, (51), 3 states have call successors, (51) Word has length 479 [2021-11-21 01:58:27,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:58:27,713 INFO L225 Difference]: With dead ends: 70977 [2021-11-21 01:58:27,713 INFO L226 Difference]: Without dead ends: 38984 [2021-11-21 01:58:27,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:58:27,774 INFO L933 BasicCegarLoop]: 1447 mSDtfsCounter, 710 mSDsluCounter, 1415 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 14 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 710 SdHoareTripleChecker+Valid, 2594 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:58:27,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [710 Valid, 2594 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 874 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2021-11-21 01:58:27,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38984 states. [2021-11-21 01:58:29,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38984 to 38978. [2021-11-21 01:58:29,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38978 states, 26215 states have (on average 1.327369826435247) internal successors, (34797), 26519 states have internal predecessors, (34797), 8671 states have call successors, (8671), 4040 states have call predecessors, (8671), 4090 states have return successors, (8736), 8503 states have call predecessors, (8736), 8671 states have call successors, (8736) [2021-11-21 01:58:29,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38978 states to 38978 states and 52204 transitions. [2021-11-21 01:58:29,667 INFO L78 Accepts]: Start accepts. Automaton has 38978 states and 52204 transitions. Word has length 479 [2021-11-21 01:58:29,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:58:29,669 INFO L470 AbstractCegarLoop]: Abstraction has 38978 states and 52204 transitions. [2021-11-21 01:58:29,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 3 states have call successors, (54), 2 states have call predecessors, (54), 1 states have return successors, (51), 3 states have call predecessors, (51), 3 states have call successors, (51) [2021-11-21 01:58:29,669 INFO L276 IsEmpty]: Start isEmpty. Operand 38978 states and 52204 transitions. [2021-11-21 01:58:29,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2021-11-21 01:58:29,693 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:58:29,693 INFO L514 BasicCegarLoop]: trace histogram [34, 24, 24, 24, 24, 24, 24, 14, 14, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:58:29,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-21 01:58:29,694 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:58:29,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:58:29,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1797818268, now seen corresponding path program 1 times [2021-11-21 01:58:29,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:58:29,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370426505] [2021-11-21 01:58:29,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:58:29,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:58:29,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:58:29,893 INFO L134 CoverageAnalysis]: Checked inductivity of 3175 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 3143 trivial. 0 not checked. [2021-11-21 01:58:29,894 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:58:29,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370426505] [2021-11-21 01:58:29,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370426505] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:58:29,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:58:29,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:58:29,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235423053] [2021-11-21 01:58:29,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:58:29,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:58:29,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:58:29,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:58:29,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:58:29,897 INFO L87 Difference]: Start difference. First operand 38978 states and 52204 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 3 states have call successors, (56), 2 states have call predecessors, (56), 1 states have return successors, (53), 3 states have call predecessors, (53), 3 states have call successors, (53) [2021-11-21 01:58:35,137 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:58:37,663 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:58:37,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:58:37,929 INFO L93 Difference]: Finished difference Result 86488 states and 115919 transitions. [2021-11-21 01:58:37,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:58:37,930 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 3 states have call successors, (56), 2 states have call predecessors, (56), 1 states have return successors, (53), 3 states have call predecessors, (53), 3 states have call successors, (53) Word has length 489 [2021-11-21 01:58:37,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:58:38,082 INFO L225 Difference]: With dead ends: 86488 [2021-11-21 01:58:38,082 INFO L226 Difference]: Without dead ends: 47766 [2021-11-21 01:58:38,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:58:38,161 INFO L933 BasicCegarLoop]: 1585 mSDtfsCounter, 855 mSDsluCounter, 2522 mSDsCounter, 0 mSdLazyCounter, 1128 mSolverCounterSat, 7 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 856 SdHoareTripleChecker+Valid, 3683 SdHoareTripleChecker+Invalid, 1137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1128 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:58:38,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [856 Valid, 3683 Invalid, 1137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1128 Invalid, 2 Unknown, 0 Unchecked, 6.0s Time] [2021-11-21 01:58:38,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47766 states. [2021-11-21 01:58:40,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47766 to 47735. [2021-11-21 01:58:40,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47735 states, 32198 states have (on average 1.3287781849804337) internal successors, (42784), 32572 states have internal predecessors, (42784), 10514 states have call successors, (10514), 4971 states have call predecessors, (10514), 5021 states have return successors, (10584), 10291 states have call predecessors, (10584), 10514 states have call successors, (10584) [2021-11-21 01:58:40,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47735 states to 47735 states and 63882 transitions. [2021-11-21 01:58:40,281 INFO L78 Accepts]: Start accepts. Automaton has 47735 states and 63882 transitions. Word has length 489 [2021-11-21 01:58:40,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:58:40,283 INFO L470 AbstractCegarLoop]: Abstraction has 47735 states and 63882 transitions. [2021-11-21 01:58:40,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 3 states have call successors, (56), 2 states have call predecessors, (56), 1 states have return successors, (53), 3 states have call predecessors, (53), 3 states have call successors, (53) [2021-11-21 01:58:40,284 INFO L276 IsEmpty]: Start isEmpty. Operand 47735 states and 63882 transitions. [2021-11-21 01:58:40,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2021-11-21 01:58:40,315 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:58:40,316 INFO L514 BasicCegarLoop]: trace histogram [36, 24, 24, 24, 24, 24, 24, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-21 01:58:40,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-21 01:58:40,316 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:58:40,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:58:40,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1532575998, now seen corresponding path program 1 times [2021-11-21 01:58:40,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:58:40,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737534627] [2021-11-21 01:58:40,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:58:40,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:58:40,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:58:40,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3408 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 3358 trivial. 0 not checked. [2021-11-21 01:58:40,524 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:58:40,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737534627] [2021-11-21 01:58:40,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737534627] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:58:40,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:58:40,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:58:40,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274016695] [2021-11-21 01:58:40,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:58:40,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:58:40,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:58:40,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:58:40,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:58:40,528 INFO L87 Difference]: Start difference. First operand 47735 states and 63882 transitions. Second operand has 5 states, 5 states have (on average 24.6) internal successors, (123), 4 states have internal predecessors, (123), 3 states have call successors, (55), 2 states have call predecessors, (55), 2 states have return successors, (52), 4 states have call predecessors, (52), 3 states have call successors, (52) [2021-11-21 01:58:45,430 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:58:46,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:58:46,054 INFO L93 Difference]: Finished difference Result 103980 states and 139185 transitions. [2021-11-21 01:58:46,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:58:46,055 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 4 states have internal predecessors, (123), 3 states have call successors, (55), 2 states have call predecessors, (55), 2 states have return successors, (52), 4 states have call predecessors, (52), 3 states have call successors, (52) Word has length 506 [2021-11-21 01:58:46,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:58:46,204 INFO L225 Difference]: With dead ends: 103980 [2021-11-21 01:58:46,205 INFO L226 Difference]: Without dead ends: 56501 [2021-11-21 01:58:46,278 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 01:58:46,279 INFO L933 BasicCegarLoop]: 1589 mSDtfsCounter, 826 mSDsluCounter, 4756 mSDsCounter, 0 mSdLazyCounter, 1063 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 831 SdHoareTripleChecker+Valid, 5630 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1063 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:58:46,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [831 Valid, 5630 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1063 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2021-11-21 01:58:46,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56501 states. [2021-11-21 01:58:48,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56501 to 56232. [2021-11-21 01:58:48,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56232 states, 37971 states have (on average 1.3302520344473414) internal successors, (50511), 38410 states have internal predecessors, (50511), 12348 states have call successors, (12348), 5826 states have call predecessors, (12348), 5911 states have return successors, (12458), 12105 states have call predecessors, (12458), 12348 states have call successors, (12458) [2021-11-21 01:58:48,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56232 states to 56232 states and 75317 transitions. [2021-11-21 01:58:48,924 INFO L78 Accepts]: Start accepts. Automaton has 56232 states and 75317 transitions. Word has length 506 [2021-11-21 01:58:48,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:58:48,925 INFO L470 AbstractCegarLoop]: Abstraction has 56232 states and 75317 transitions. [2021-11-21 01:58:48,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 4 states have internal predecessors, (123), 3 states have call successors, (55), 2 states have call predecessors, (55), 2 states have return successors, (52), 4 states have call predecessors, (52), 3 states have call successors, (52) [2021-11-21 01:58:48,925 INFO L276 IsEmpty]: Start isEmpty. Operand 56232 states and 75317 transitions. [2021-11-21 01:58:48,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2021-11-21 01:58:48,957 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:58:48,957 INFO L514 BasicCegarLoop]: trace histogram [36, 24, 24, 24, 24, 24, 24, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-21 01:58:48,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-21 01:58:48,958 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:58:48,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:58:48,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1051090239, now seen corresponding path program 1 times [2021-11-21 01:58:48,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:58:48,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075353823] [2021-11-21 01:58:48,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:58:48,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:58:49,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:58:49,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3408 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3399 trivial. 0 not checked. [2021-11-21 01:58:49,161 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:58:49,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075353823] [2021-11-21 01:58:49,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075353823] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:58:49,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815266019] [2021-11-21 01:58:49,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:58:49,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:58:49,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f61cd23f-6157-49ce-b67f-cd92bcc7377a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:58:49,166 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f61cd23f-6157-49ce-b67f-cd92bcc7377a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:58:49,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f61cd23f-6157-49ce-b67f-cd92bcc7377a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:58:49,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:58:49,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 3052 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:58:49,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:58:50,674 INFO L134 CoverageAnalysis]: Checked inductivity of 3408 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3408 trivial. 0 not checked. [2021-11-21 01:58:50,674 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:58:50,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815266019] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:58:50,674 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:58:50,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2021-11-21 01:58:50,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277492275] [2021-11-21 01:58:50,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:58:50,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:58:50,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:58:50,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:58:50,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:58:50,677 INFO L87 Difference]: Start difference. First operand 56232 states and 75317 transitions. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (54), 2 states have call predecessors, (54), 3 states have return successors, (51), 3 states have call predecessors, (51), 2 states have call successors, (51) [2021-11-21 01:58:54,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:58:54,643 INFO L93 Difference]: Finished difference Result 112423 states and 150603 transitions. [2021-11-21 01:58:54,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:58:54,651 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (54), 2 states have call predecessors, (54), 3 states have return successors, (51), 3 states have call predecessors, (51), 2 states have call successors, (51) Word has length 507 [2021-11-21 01:58:54,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:58:54,988 INFO L225 Difference]: With dead ends: 112423 [2021-11-21 01:58:54,988 INFO L226 Difference]: Without dead ends: 56447 [2021-11-21 01:58:55,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 506 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:58:55,071 INFO L933 BasicCegarLoop]: 886 mSDtfsCounter, 3 mSDsluCounter, 3122 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 3541 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:58:55,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 3541 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-21 01:58:55,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56447 states. [2021-11-21 01:58:57,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56447 to 56372. [2021-11-21 01:58:57,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56372 states, 38091 states have (on average 1.3292116247932582) internal successors, (50631), 38525 states have internal predecessors, (50631), 12348 states have call successors, (12348), 5826 states have call predecessors, (12348), 5931 states have return successors, (12478), 12130 states have call predecessors, (12478), 12348 states have call successors, (12478) [2021-11-21 01:58:58,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56372 states to 56372 states and 75457 transitions. [2021-11-21 01:58:58,020 INFO L78 Accepts]: Start accepts. Automaton has 56372 states and 75457 transitions. Word has length 507 [2021-11-21 01:58:58,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:58:58,021 INFO L470 AbstractCegarLoop]: Abstraction has 56372 states and 75457 transitions. [2021-11-21 01:58:58,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (54), 2 states have call predecessors, (54), 3 states have return successors, (51), 3 states have call predecessors, (51), 2 states have call successors, (51) [2021-11-21 01:58:58,021 INFO L276 IsEmpty]: Start isEmpty. Operand 56372 states and 75457 transitions. [2021-11-21 01:58:58,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2021-11-21 01:58:58,045 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:58:58,045 INFO L514 BasicCegarLoop]: trace histogram [36, 24, 24, 24, 24, 24, 24, 15, 15, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-21 01:58:58,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f61cd23f-6157-49ce-b67f-cd92bcc7377a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:58:58,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f61cd23f-6157-49ce-b67f-cd92bcc7377a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-21 01:58:58,257 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:58:58,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:58:58,258 INFO L85 PathProgramCache]: Analyzing trace with hash 630394393, now seen corresponding path program 1 times [2021-11-21 01:58:58,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:58:58,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144097337] [2021-11-21 01:58:58,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:58:58,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:58:58,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:58:58,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3410 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 3363 trivial. 0 not checked. [2021-11-21 01:58:58,460 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:58:58,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144097337] [2021-11-21 01:58:58,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144097337] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:58:58,461 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:58:58,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:58:58,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329438659] [2021-11-21 01:58:58,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:58:58,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:58:58,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:58:58,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:58:58,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:58:58,463 INFO L87 Difference]: Start difference. First operand 56372 states and 75457 transitions. Second operand has 5 states, 5 states have (on average 24.4) internal successors, (122), 4 states have internal predecessors, (122), 3 states have call successors, (57), 2 states have call predecessors, (57), 2 states have return successors, (54), 4 states have call predecessors, (54), 3 states have call successors, (54)