./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_fs-nfs-blocklayout-blocklayoutdriver.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db077815-8cfc-4336-ac42-76ffa01d58c0/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db077815-8cfc-4336-ac42-76ffa01d58c0/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db077815-8cfc-4336-ac42-76ffa01d58c0/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db077815-8cfc-4336-ac42-76ffa01d58c0/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_fs-nfs-blocklayout-blocklayoutdriver.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db077815-8cfc-4336-ac42-76ffa01d58c0/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db077815-8cfc-4336-ac42-76ffa01d58c0/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 9bfbecd8ca52470a88d05c2ee48bea0bde6dbc2be84932ebcf7050b5532f4c7c --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:39:20,276 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:39:20,279 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:39:20,340 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:39:20,341 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:39:20,346 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:39:20,348 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:39:20,352 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:39:20,354 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:39:20,362 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:39:20,363 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:39:20,365 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:39:20,365 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:39:20,368 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:39:20,370 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:39:20,375 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:39:20,379 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:39:20,380 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:39:20,382 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:39:20,385 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:39:20,387 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:39:20,390 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:39:20,394 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:39:20,395 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:39:20,406 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:39:20,406 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:39:20,406 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:39:20,409 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:39:20,409 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:39:20,411 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:39:20,411 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:39:20,412 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:39:20,414 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:39:20,415 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:39:20,417 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:39:20,417 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:39:20,418 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:39:20,418 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:39:20,418 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:39:20,419 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:39:20,420 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:39:20,421 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db077815-8cfc-4336-ac42-76ffa01d58c0/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-25 19:39:20,464 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:39:20,464 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:39:20,465 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:39:20,465 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:39:20,466 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:39:20,466 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:39:20,466 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:39:20,467 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:39:20,467 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:39:20,467 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:39:20,468 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:39:20,468 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:39:20,468 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:39:20,469 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:39:20,469 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:39:20,469 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:39:20,469 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:39:20,469 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:39:20,470 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:39:20,470 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:39:20,471 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:39:20,471 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:39:20,471 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:39:20,471 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:39:20,471 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:39:20,472 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:39:20,473 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:39:20,473 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:39:20,474 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:39:20,474 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:39:20,474 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:39:20,475 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:39:20,475 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:39:20,475 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:39:20,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:39:20,475 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:39:20,476 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:39:20,476 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:39:20,476 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_db077815-8cfc-4336-ac42-76ffa01d58c0/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db077815-8cfc-4336-ac42-76ffa01d58c0/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9bfbecd8ca52470a88d05c2ee48bea0bde6dbc2be84932ebcf7050b5532f4c7c [2021-11-25 19:39:20,758 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:39:20,794 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:39:20,797 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:39:20,798 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:39:20,802 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:39:20,804 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db077815-8cfc-4336-ac42-76ffa01d58c0/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_fs-nfs-blocklayout-blocklayoutdriver.cil.i [2021-11-25 19:39:20,871 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db077815-8cfc-4336-ac42-76ffa01d58c0/bin/utaipan-eEHZpOm5b7/data/5e2f19ac2/17b63d8004604abe89548f694dfd40d0/FLAGc84b4a820 [2021-11-25 19:39:21,915 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:39:21,915 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db077815-8cfc-4336-ac42-76ffa01d58c0/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_fs-nfs-blocklayout-blocklayoutdriver.cil.i [2021-11-25 19:39:21,988 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db077815-8cfc-4336-ac42-76ffa01d58c0/bin/utaipan-eEHZpOm5b7/data/5e2f19ac2/17b63d8004604abe89548f694dfd40d0/FLAGc84b4a820 [2021-11-25 19:39:22,338 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db077815-8cfc-4336-ac42-76ffa01d58c0/bin/utaipan-eEHZpOm5b7/data/5e2f19ac2/17b63d8004604abe89548f694dfd40d0 [2021-11-25 19:39:22,342 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:39:22,344 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:39:22,348 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:39:22,349 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:39:22,352 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:39:22,354 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:39:22" (1/1) ... [2021-11-25 19:39:22,355 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b5ee20f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:39:22, skipping insertion in model container [2021-11-25 19:39:22,356 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:39:22" (1/1) ... [2021-11-25 19:39:22,363 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:39:22,641 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:39:27,527 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_db077815-8cfc-4336-ac42-76ffa01d58c0/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_fs-nfs-blocklayout-blocklayoutdriver.cil.i[517003,517016] [2021-11-25 19:39:27,530 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_db077815-8cfc-4336-ac42-76ffa01d58c0/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_fs-nfs-blocklayout-blocklayoutdriver.cil.i[517172,517185] [2021-11-25 19:39:27,531 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_db077815-8cfc-4336-ac42-76ffa01d58c0/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_fs-nfs-blocklayout-blocklayoutdriver.cil.i[517339,517352] [2021-11-25 19:39:27,531 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_db077815-8cfc-4336-ac42-76ffa01d58c0/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_fs-nfs-blocklayout-blocklayoutdriver.cil.i[517507,517520] [2021-11-25 19:39:27,555 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:39:27,580 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:39:28,026 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_db077815-8cfc-4336-ac42-76ffa01d58c0/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_fs-nfs-blocklayout-blocklayoutdriver.cil.i[517003,517016] [2021-11-25 19:39:28,027 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_db077815-8cfc-4336-ac42-76ffa01d58c0/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_fs-nfs-blocklayout-blocklayoutdriver.cil.i[517172,517185] [2021-11-25 19:39:28,028 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_db077815-8cfc-4336-ac42-76ffa01d58c0/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_fs-nfs-blocklayout-blocklayoutdriver.cil.i[517339,517352] [2021-11-25 19:39:28,028 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_db077815-8cfc-4336-ac42-76ffa01d58c0/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_fs-nfs-blocklayout-blocklayoutdriver.cil.i[517507,517520] [2021-11-25 19:39:28,034 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:39:28,301 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:39:28,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:39:28 WrapperNode [2021-11-25 19:39:28,302 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:39:28,303 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:39:28,303 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:39:28,304 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:39:28,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:39:28" (1/1) ... [2021-11-25 19:39:28,459 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:39:28" (1/1) ... [2021-11-25 19:39:28,755 INFO L137 Inliner]: procedures = 584, calls = 2495, calls flagged for inlining = 241, calls inlined = 220, statements flattened = 7034 [2021-11-25 19:39:28,755 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:39:28,756 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:39:28,757 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:39:28,757 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:39:28,765 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:39:28" (1/1) ... [2021-11-25 19:39:28,766 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:39:28" (1/1) ... [2021-11-25 19:39:28,799 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:39:28" (1/1) ... [2021-11-25 19:39:28,799 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:39:28" (1/1) ... [2021-11-25 19:39:28,964 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:39:28" (1/1) ... [2021-11-25 19:39:29,002 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:39:28" (1/1) ... [2021-11-25 19:39:29,116 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:39:28" (1/1) ... [2021-11-25 19:39:29,166 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:39:29,167 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:39:29,168 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:39:29,168 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:39:29,169 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:39:28" (1/1) ... [2021-11-25 19:39:29,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:39:29,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db077815-8cfc-4336-ac42-76ffa01d58c0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:39:29,208 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db077815-8cfc-4336-ac42-76ffa01d58c0/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:39:29,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db077815-8cfc-4336-ac42-76ffa01d58c0/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:39:29,265 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_parallel [2021-11-25 19:39:29,265 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_parallel [2021-11-25 19:39:29,265 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2021-11-25 19:39:29,265 INFO L130 BoogieDeclarations]: Found specification of procedure i_size_read [2021-11-25 19:39:29,266 INFO L138 BoogieDeclarations]: Found implementation of procedure i_size_read [2021-11-25 19:39:29,266 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-25 19:39:29,266 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-25 19:39:29,266 INFO L130 BoogieDeclarations]: Found specification of procedure add_to_commitlist [2021-11-25 19:39:29,266 INFO L138 BoogieDeclarations]: Found implementation of procedure add_to_commitlist [2021-11-25 19:39:29,267 INFO L130 BoogieDeclarations]: Found specification of procedure rpc_put_sb_net [2021-11-25 19:39:29,267 INFO L138 BoogieDeclarations]: Found implementation of procedure rpc_put_sb_net [2021-11-25 19:39:29,267 INFO L130 BoogieDeclarations]: Found specification of procedure lowmem_page_address [2021-11-25 19:39:29,267 INFO L138 BoogieDeclarations]: Found implementation of procedure lowmem_page_address [2021-11-25 19:39:29,267 INFO L130 BoogieDeclarations]: Found specification of procedure debug_lockdep_rcu_enabled [2021-11-25 19:39:29,267 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_lockdep_rcu_enabled [2021-11-25 19:39:29,268 INFO L130 BoogieDeclarations]: Found specification of procedure bl_write_pagelist [2021-11-25 19:39:29,268 INFO L138 BoogieDeclarations]: Found implementation of procedure bl_write_pagelist [2021-11-25 19:39:29,268 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-25 19:39:29,268 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-25 19:39:29,268 INFO L130 BoogieDeclarations]: Found specification of procedure bio_alloc [2021-11-25 19:39:29,269 INFO L138 BoogieDeclarations]: Found implementation of procedure bio_alloc [2021-11-25 19:39:29,269 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-25 19:39:29,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-25 19:39:29,269 INFO L130 BoogieDeclarations]: Found specification of procedure pnfs_unregister_layoutdriver [2021-11-25 19:39:29,269 INFO L138 BoogieDeclarations]: Found implementation of procedure pnfs_unregister_layoutdriver [2021-11-25 19:39:29,269 INFO L130 BoogieDeclarations]: Found specification of procedure trylock_page [2021-11-25 19:39:29,270 INFO L138 BoogieDeclarations]: Found implementation of procedure trylock_page [2021-11-25 19:39:29,270 INFO L130 BoogieDeclarations]: Found specification of procedure submit_bio [2021-11-25 19:39:29,270 INFO L138 BoogieDeclarations]: Found implementation of procedure submit_bio [2021-11-25 19:39:29,270 INFO L130 BoogieDeclarations]: Found specification of procedure BLK_LSEG2EXT [2021-11-25 19:39:29,270 INFO L138 BoogieDeclarations]: Found implementation of procedure BLK_LSEG2EXT [2021-11-25 19:39:29,271 INFO L130 BoogieDeclarations]: Found specification of procedure nfs4blocklayout_unregister_sb [2021-11-25 19:39:29,271 INFO L138 BoogieDeclarations]: Found implementation of procedure nfs4blocklayout_unregister_sb [2021-11-25 19:39:29,271 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~VOID [2021-11-25 19:39:29,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~VOID [2021-11-25 19:39:29,271 INFO L130 BoogieDeclarations]: Found specification of procedure NFS_SERVER [2021-11-25 19:39:29,272 INFO L138 BoogieDeclarations]: Found implementation of procedure NFS_SERVER [2021-11-25 19:39:29,272 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-25 19:39:29,272 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-25 19:39:29,272 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-25 19:39:29,273 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_lock_release [2021-11-25 19:39:29,273 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_lock_release [2021-11-25 19:39:29,274 INFO L130 BoogieDeclarations]: Found specification of procedure BLK_LO2EXT [2021-11-25 19:39:29,274 INFO L138 BoogieDeclarations]: Found implementation of procedure BLK_LO2EXT [2021-11-25 19:39:29,275 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_pages [2021-11-25 19:39:29,275 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_pages [2021-11-25 19:39:29,275 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-25 19:39:29,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-25 19:39:29,276 INFO L130 BoogieDeclarations]: Found specification of procedure print_page [2021-11-25 19:39:29,276 INFO L138 BoogieDeclarations]: Found implementation of procedure print_page [2021-11-25 19:39:29,276 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2021-11-25 19:39:29,277 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-25 19:39:29,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-25 19:39:29,277 INFO L130 BoogieDeclarations]: Found specification of procedure PageWriteback [2021-11-25 19:39:29,278 INFO L138 BoogieDeclarations]: Found implementation of procedure PageWriteback [2021-11-25 19:39:29,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 19:39:29,278 INFO L130 BoogieDeclarations]: Found specification of procedure bl_free_layout_hdr [2021-11-25 19:39:29,278 INFO L138 BoogieDeclarations]: Found implementation of procedure bl_free_layout_hdr [2021-11-25 19:39:29,278 INFO L130 BoogieDeclarations]: Found specification of procedure print_clist [2021-11-25 19:39:29,279 INFO L138 BoogieDeclarations]: Found implementation of procedure print_clist [2021-11-25 19:39:29,279 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2021-11-25 19:39:29,279 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2021-11-25 19:39:29,279 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-25 19:39:29,280 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-25 19:39:29,280 INFO L130 BoogieDeclarations]: Found specification of procedure zero_user_segments [2021-11-25 19:39:29,280 INFO L138 BoogieDeclarations]: Found implementation of procedure zero_user_segments [2021-11-25 19:39:29,280 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-11-25 19:39:29,280 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-11-25 19:39:29,281 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2021-11-25 19:39:29,281 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2021-11-25 19:39:29,281 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-25 19:39:29,282 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-11-25 19:39:29,282 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-11-25 19:39:29,282 INFO L130 BoogieDeclarations]: Found specification of procedure bl_alloc_layout_hdr [2021-11-25 19:39:29,282 INFO L138 BoogieDeclarations]: Found implementation of procedure bl_alloc_layout_hdr [2021-11-25 19:39:29,283 INFO L130 BoogieDeclarations]: Found specification of procedure PageDirty [2021-11-25 19:39:29,283 INFO L138 BoogieDeclarations]: Found implementation of procedure PageDirty [2021-11-25 19:39:29,284 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-25 19:39:29,284 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-25 19:39:29,284 INFO L130 BoogieDeclarations]: Found specification of procedure is_writable [2021-11-25 19:39:29,284 INFO L138 BoogieDeclarations]: Found implementation of procedure is_writable [2021-11-25 19:39:29,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-25 19:39:29,285 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-25 19:39:29,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-25 19:39:29,286 INFO L130 BoogieDeclarations]: Found specification of procedure normalize [2021-11-25 19:39:29,286 INFO L138 BoogieDeclarations]: Found implementation of procedure normalize [2021-11-25 19:39:29,286 INFO L130 BoogieDeclarations]: Found specification of procedure kref_get [2021-11-25 19:39:29,287 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_get [2021-11-25 19:39:29,287 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 19:39:29,287 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_bh_80 [2021-11-25 19:39:29,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_bh_80 [2021-11-25 19:39:29,287 INFO L130 BoogieDeclarations]: Found specification of procedure nfs4blocklayout_net_exit [2021-11-25 19:39:29,288 INFO L138 BoogieDeclarations]: Found implementation of procedure nfs4blocklayout_net_exit [2021-11-25 19:39:29,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-25 19:39:29,288 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-25 19:39:29,288 INFO L130 BoogieDeclarations]: Found specification of procedure rpc_get_sb_net [2021-11-25 19:39:29,289 INFO L138 BoogieDeclarations]: Found implementation of procedure rpc_get_sb_net [2021-11-25 19:39:29,289 INFO L130 BoogieDeclarations]: Found specification of procedure extents_consistent [2021-11-25 19:39:29,289 INFO L138 BoogieDeclarations]: Found implementation of procedure extents_consistent [2021-11-25 19:39:29,289 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_is_watching [2021-11-25 19:39:29,290 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_is_watching [2021-11-25 19:39:29,290 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_rpc_pipefs_notifier_unregister [2021-11-25 19:39:29,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_rpc_pipefs_notifier_unregister [2021-11-25 19:39:29,290 INFO L130 BoogieDeclarations]: Found specification of procedure bl_submit_bio [2021-11-25 19:39:29,291 INFO L138 BoogieDeclarations]: Found implementation of procedure bl_submit_bio [2021-11-25 19:39:29,292 INFO L130 BoogieDeclarations]: Found specification of procedure list_add_tail [2021-11-25 19:39:29,294 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add_tail [2021-11-25 19:39:29,294 INFO L130 BoogieDeclarations]: Found specification of procedure rpc_queue_upcall [2021-11-25 19:39:29,295 INFO L138 BoogieDeclarations]: Found implementation of procedure rpc_queue_upcall [2021-11-25 19:39:29,295 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2021-11-25 19:39:29,295 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2021-11-25 19:39:29,296 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock [2021-11-25 19:39:29,296 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock [2021-11-25 19:39:29,296 INFO L130 BoogieDeclarations]: Found specification of procedure bl_put_extent [2021-11-25 19:39:29,297 INFO L138 BoogieDeclarations]: Found implementation of procedure bl_put_extent [2021-11-25 19:39:29,302 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-25 19:39:29,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-25 19:39:29,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 19:39:29,303 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_1 [2021-11-25 19:39:29,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_1 [2021-11-25 19:39:29,303 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_0 [2021-11-25 19:39:29,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_0 [2021-11-25 19:39:29,304 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_2 [2021-11-25 19:39:29,304 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_2 [2021-11-25 19:39:29,304 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2021-11-25 19:39:29,304 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2021-11-25 19:39:29,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:39:29,304 INFO L130 BoogieDeclarations]: Found specification of procedure xdr_inline_decode [2021-11-25 19:39:29,304 INFO L138 BoogieDeclarations]: Found implementation of procedure xdr_inline_decode [2021-11-25 19:39:29,305 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-25 19:39:29,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-25 19:39:29,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 19:39:29,305 INFO L130 BoogieDeclarations]: Found specification of procedure clean_pnfs_block_layoutupdate [2021-11-25 19:39:29,305 INFO L138 BoogieDeclarations]: Found implementation of procedure clean_pnfs_block_layoutupdate [2021-11-25 19:39:29,305 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-25 19:39:29,306 INFO L130 BoogieDeclarations]: Found specification of procedure bl_alloc_lseg [2021-11-25 19:39:29,306 INFO L138 BoogieDeclarations]: Found implementation of procedure bl_alloc_lseg [2021-11-25 19:39:29,306 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-25 19:39:29,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-25 19:39:29,306 INFO L130 BoogieDeclarations]: Found specification of procedure lock_page [2021-11-25 19:39:29,306 INFO L138 BoogieDeclarations]: Found implementation of procedure lock_page [2021-11-25 19:39:29,307 INFO L130 BoogieDeclarations]: Found specification of procedure end_page_writeback [2021-11-25 19:39:29,307 INFO L138 BoogieDeclarations]: Found implementation of procedure end_page_writeback [2021-11-25 19:39:29,307 INFO L130 BoogieDeclarations]: Found specification of procedure print_elist [2021-11-25 19:39:29,307 INFO L138 BoogieDeclarations]: Found implementation of procedure print_elist [2021-11-25 19:39:29,307 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2021-11-25 19:39:29,307 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2021-11-25 19:39:29,307 INFO L130 BoogieDeclarations]: Found specification of procedure kmap_atomic [2021-11-25 19:39:29,308 INFO L138 BoogieDeclarations]: Found implementation of procedure kmap_atomic [2021-11-25 19:39:29,308 INFO L130 BoogieDeclarations]: Found specification of procedure __init_work [2021-11-25 19:39:29,308 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_work [2021-11-25 19:39:29,308 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-25 19:39:29,308 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-25 19:39:29,308 INFO L130 BoogieDeclarations]: Found specification of procedure bl_cleanup_layoutcommit [2021-11-25 19:39:29,309 INFO L138 BoogieDeclarations]: Found implementation of procedure bl_cleanup_layoutcommit [2021-11-25 19:39:29,309 INFO L130 BoogieDeclarations]: Found specification of procedure PageLocked [2021-11-25 19:39:29,309 INFO L138 BoogieDeclarations]: Found implementation of procedure PageLocked [2021-11-25 19:39:29,309 INFO L130 BoogieDeclarations]: Found specification of procedure pnfs_generic_pg_test [2021-11-25 19:39:29,309 INFO L138 BoogieDeclarations]: Found implementation of procedure pnfs_generic_pg_test [2021-11-25 19:39:29,309 INFO L130 BoogieDeclarations]: Found specification of procedure rpc_destroy_pipe_data [2021-11-25 19:39:29,310 INFO L138 BoogieDeclarations]: Found implementation of procedure rpc_destroy_pipe_data [2021-11-25 19:39:29,310 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_parallel [2021-11-25 19:39:29,310 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_parallel [2021-11-25 19:39:29,310 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-25 19:39:29,310 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-25 19:39:29,310 INFO L130 BoogieDeclarations]: Found specification of procedure bl_is_sector_init [2021-11-25 19:39:29,311 INFO L138 BoogieDeclarations]: Found implementation of procedure bl_is_sector_init [2021-11-25 19:39:29,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:39:29,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:39:29,311 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-11-25 19:39:29,311 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-11-25 19:39:29,311 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab32 [2021-11-25 19:39:29,311 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab32 [2021-11-25 19:39:29,312 INFO L130 BoogieDeclarations]: Found specification of procedure unlock_page [2021-11-25 19:39:29,312 INFO L138 BoogieDeclarations]: Found implementation of procedure unlock_page [2021-11-25 19:39:29,312 INFO L130 BoogieDeclarations]: Found specification of procedure kref_sub [2021-11-25 19:39:29,312 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_sub [2021-11-25 19:39:29,312 INFO L130 BoogieDeclarations]: Found specification of procedure remove_wait_queue [2021-11-25 19:39:29,312 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_wait_queue [2021-11-25 19:39:29,314 INFO L130 BoogieDeclarations]: Found specification of procedure bl_clear_layoutdriver [2021-11-25 19:39:29,314 INFO L138 BoogieDeclarations]: Found implementation of procedure bl_clear_layoutdriver [2021-11-25 19:39:29,315 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-25 19:39:29,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-25 19:39:29,315 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-25 19:39:29,315 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-25 19:39:29,315 INFO L130 BoogieDeclarations]: Found specification of procedure bl_pipe_destroy_msg [2021-11-25 19:39:29,315 INFO L138 BoogieDeclarations]: Found implementation of procedure bl_pipe_destroy_msg [2021-11-25 19:39:29,315 INFO L130 BoogieDeclarations]: Found specification of procedure bl_read_pagelist [2021-11-25 19:39:29,316 INFO L138 BoogieDeclarations]: Found implementation of procedure bl_read_pagelist [2021-11-25 19:39:29,316 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-25 19:39:29,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-25 19:39:29,316 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-11-25 19:39:29,316 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-11-25 19:39:29,316 INFO L130 BoogieDeclarations]: Found specification of procedure print_bl_extent [2021-11-25 19:39:29,317 INFO L138 BoogieDeclarations]: Found implementation of procedure print_bl_extent [2021-11-25 19:39:29,317 INFO L130 BoogieDeclarations]: Found specification of procedure bl_end_io_read [2021-11-25 19:39:29,317 INFO L138 BoogieDeclarations]: Found implementation of procedure bl_end_io_read [2021-11-25 19:39:29,317 INFO L130 BoogieDeclarations]: Found specification of procedure __be32_to_cpup [2021-11-25 19:39:29,317 INFO L138 BoogieDeclarations]: Found implementation of procedure __be32_to_cpup [2021-11-25 19:39:29,317 INFO L130 BoogieDeclarations]: Found specification of procedure xdr_encode_hyper [2021-11-25 19:39:29,317 INFO L138 BoogieDeclarations]: Found implementation of procedure xdr_encode_hyper [2021-11-25 19:39:29,318 INFO L130 BoogieDeclarations]: Found specification of procedure bl_write_cleanup [2021-11-25 19:39:29,318 INFO L138 BoogieDeclarations]: Found implementation of procedure bl_write_cleanup [2021-11-25 19:39:29,318 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_read [2021-11-25 19:39:29,318 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_read [2021-11-25 19:39:29,318 INFO L130 BoogieDeclarations]: Found specification of procedure bl_mark_sectors_init [2021-11-25 19:39:29,318 INFO L138 BoogieDeclarations]: Found implementation of procedure bl_mark_sectors_init [2021-11-25 19:39:29,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-25 19:39:29,319 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-25 19:39:29,319 INFO L130 BoogieDeclarations]: Found specification of procedure free_blk_mountid [2021-11-25 19:39:29,319 INFO L138 BoogieDeclarations]: Found implementation of procedure free_blk_mountid [2021-11-25 19:39:29,319 INFO L130 BoogieDeclarations]: Found specification of procedure ERR_PTR [2021-11-25 19:39:29,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ERR_PTR [2021-11-25 19:39:29,319 INFO L130 BoogieDeclarations]: Found specification of procedure is_range_written [2021-11-25 19:39:29,320 INFO L138 BoogieDeclarations]: Found implementation of procedure is_range_written [2021-11-25 19:39:29,320 INFO L130 BoogieDeclarations]: Found specification of procedure __kmalloc [2021-11-25 19:39:29,320 INFO L138 BoogieDeclarations]: Found implementation of procedure __kmalloc [2021-11-25 19:39:29,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 19:39:29,320 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-25 19:39:29,320 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-25 19:39:29,321 INFO L130 BoogieDeclarations]: Found specification of procedure list_replace [2021-11-25 19:39:29,321 INFO L138 BoogieDeclarations]: Found implementation of procedure list_replace [2021-11-25 19:39:29,321 INFO L130 BoogieDeclarations]: Found specification of procedure module_put [2021-11-25 19:39:29,321 INFO L138 BoogieDeclarations]: Found implementation of procedure module_put [2021-11-25 19:39:29,321 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 19:39:29,321 INFO L130 BoogieDeclarations]: Found specification of procedure put_page [2021-11-25 19:39:29,321 INFO L138 BoogieDeclarations]: Found implementation of procedure put_page [2021-11-25 19:39:29,322 INFO L130 BoogieDeclarations]: Found specification of procedure __list_del_entry [2021-11-25 19:39:29,322 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_del_entry [2021-11-25 19:39:29,322 INFO L130 BoogieDeclarations]: Found specification of procedure is_aligned_req [2021-11-25 19:39:29,322 INFO L138 BoogieDeclarations]: Found implementation of procedure is_aligned_req [2021-11-25 19:39:29,322 INFO L130 BoogieDeclarations]: Found specification of procedure __free_pages [2021-11-25 19:39:29,323 INFO L138 BoogieDeclarations]: Found implementation of procedure __free_pages [2021-11-25 19:39:29,327 INFO L130 BoogieDeclarations]: Found specification of procedure _prep_new_extent [2021-11-25 19:39:29,327 INFO L138 BoogieDeclarations]: Found implementation of procedure _prep_new_extent [2021-11-25 19:39:29,327 INFO L130 BoogieDeclarations]: Found specification of procedure bio_put [2021-11-25 19:39:29,327 INFO L138 BoogieDeclarations]: Found implementation of procedure bio_put [2021-11-25 19:39:29,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 19:39:29,328 INFO L130 BoogieDeclarations]: Found specification of procedure print_short_extent [2021-11-25 19:39:29,328 INFO L138 BoogieDeclarations]: Found implementation of procedure print_short_extent [2021-11-25 19:39:29,328 INFO L130 BoogieDeclarations]: Found specification of procedure NFS_I [2021-11-25 19:39:29,328 INFO L138 BoogieDeclarations]: Found implementation of procedure NFS_I [2021-11-25 19:39:29,330 INFO L130 BoogieDeclarations]: Found specification of procedure xdr_reserve_space [2021-11-25 19:39:29,330 INFO L138 BoogieDeclarations]: Found implementation of procedure xdr_reserve_space [2021-11-25 19:39:29,330 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-25 19:39:29,330 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-25 19:39:29,330 INFO L130 BoogieDeclarations]: Found specification of procedure rpc_pipefs_notifier_unregister [2021-11-25 19:39:29,331 INFO L138 BoogieDeclarations]: Found implementation of procedure rpc_pipefs_notifier_unregister [2021-11-25 19:39:29,331 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_im_lock_of_pnfs_inval_markings [2021-11-25 19:39:29,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_im_lock_of_pnfs_inval_markings [2021-11-25 19:39:29,331 INFO L130 BoogieDeclarations]: Found specification of procedure add_wait_queue [2021-11-25 19:39:29,331 INFO L138 BoogieDeclarations]: Found implementation of procedure add_wait_queue [2021-11-25 19:39:29,331 INFO L130 BoogieDeclarations]: Found specification of procedure bl_push_one_short_extent [2021-11-25 19:39:29,332 INFO L138 BoogieDeclarations]: Found implementation of procedure bl_push_one_short_extent [2021-11-25 19:39:29,332 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-25 19:39:29,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-25 19:39:29,332 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_init_map [2021-11-25 19:39:29,332 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_init_map [2021-11-25 19:39:29,332 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-25 19:39:29,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-25 19:39:29,333 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_81 [2021-11-25 19:39:29,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_81 [2021-11-25 19:39:29,333 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2021-11-25 19:39:29,333 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2021-11-25 19:39:29,333 INFO L130 BoogieDeclarations]: Found specification of procedure __rcu_read_lock [2021-11-25 19:39:29,333 INFO L138 BoogieDeclarations]: Found implementation of procedure __rcu_read_lock [2021-11-25 19:39:29,333 INFO L130 BoogieDeclarations]: Found specification of procedure _set_range [2021-11-25 19:39:29,334 INFO L138 BoogieDeclarations]: Found implementation of procedure _set_range [2021-11-25 19:39:29,334 INFO L130 BoogieDeclarations]: Found specification of procedure bl_encode_layoutcommit [2021-11-25 19:39:29,334 INFO L138 BoogieDeclarations]: Found implementation of procedure bl_encode_layoutcommit [2021-11-25 19:39:29,334 INFO L130 BoogieDeclarations]: Found specification of procedure mark_extents_written [2021-11-25 19:39:29,334 INFO L138 BoogieDeclarations]: Found implementation of procedure mark_extents_written [2021-11-25 19:39:29,334 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_79 [2021-11-25 19:39:29,334 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_79 [2021-11-25 19:39:29,335 INFO L130 BoogieDeclarations]: Found specification of procedure _add_entry [2021-11-25 19:39:29,335 INFO L138 BoogieDeclarations]: Found implementation of procedure _add_entry [2021-11-25 19:39:29,335 INFO L130 BoogieDeclarations]: Found specification of procedure _front_merge [2021-11-25 19:39:29,335 INFO L138 BoogieDeclarations]: Found implementation of procedure _front_merge [2021-11-25 19:39:29,335 INFO L130 BoogieDeclarations]: Found specification of procedure do_add_page_to_bio [2021-11-25 19:39:29,335 INFO L138 BoogieDeclarations]: Found implementation of procedure do_add_page_to_bio [2021-11-25 19:39:29,336 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-25 19:39:29,336 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-25 19:39:29,336 INFO L130 BoogieDeclarations]: Found specification of procedure net_generic [2021-11-25 19:39:29,336 INFO L138 BoogieDeclarations]: Found implementation of procedure net_generic [2021-11-25 19:39:29,336 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_bh_79 [2021-11-25 19:39:29,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_bh_79 [2021-11-25 19:39:29,336 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_held [2021-11-25 19:39:29,337 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_held [2021-11-25 19:39:29,337 INFO L130 BoogieDeclarations]: Found specification of procedure bl_find_get_extent [2021-11-25 19:39:29,337 INFO L138 BoogieDeclarations]: Found implementation of procedure bl_find_get_extent [2021-11-25 19:39:29,337 INFO L130 BoogieDeclarations]: Found specification of procedure bl_free_lseg [2021-11-25 19:39:29,337 INFO L138 BoogieDeclarations]: Found implementation of procedure bl_free_lseg [2021-11-25 19:39:29,337 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-25 19:39:29,337 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-25 19:39:29,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 19:39:29,338 INFO L130 BoogieDeclarations]: Found specification of procedure __rcu_read_unlock [2021-11-25 19:39:29,338 INFO L138 BoogieDeclarations]: Found implementation of procedure __rcu_read_unlock [2021-11-25 19:39:29,338 INFO L130 BoogieDeclarations]: Found specification of procedure nfs4blocklayout_register_sb [2021-11-25 19:39:29,338 INFO L138 BoogieDeclarations]: Found implementation of procedure nfs4blocklayout_register_sb [2021-11-25 19:39:29,338 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-25 19:39:29,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-25 19:39:29,339 INFO L130 BoogieDeclarations]: Found specification of procedure SetPageUptodate [2021-11-25 19:39:29,339 INFO L138 BoogieDeclarations]: Found implementation of procedure SetPageUptodate [2021-11-25 19:39:29,339 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_im_lock_of_pnfs_inval_markings [2021-11-25 19:39:29,339 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_im_lock_of_pnfs_inval_markings [2021-11-25 19:39:29,339 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_82 [2021-11-25 19:39:29,339 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_82 [2021-11-25 19:39:29,340 INFO L130 BoogieDeclarations]: Found specification of procedure zero_user_segment [2021-11-25 19:39:29,340 INFO L138 BoogieDeclarations]: Found implementation of procedure zero_user_segment [2021-11-25 19:39:29,340 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_80 [2021-11-25 19:39:29,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_80 [2021-11-25 19:39:29,340 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_EMGentry_exit_nfs4blocklayout_exit_7_2 [2021-11-25 19:39:29,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_EMGentry_exit_nfs4blocklayout_exit_7_2 [2021-11-25 19:39:29,340 INFO L130 BoogieDeclarations]: Found specification of procedure decode_sector_number [2021-11-25 19:39:29,341 INFO L138 BoogieDeclarations]: Found implementation of procedure decode_sector_number [2021-11-25 19:39:29,341 INFO L130 BoogieDeclarations]: Found specification of procedure bl_read_partial_page_sync [2021-11-25 19:39:29,341 INFO L138 BoogieDeclarations]: Found implementation of procedure bl_read_partial_page_sync [2021-11-25 19:39:29,341 INFO L130 BoogieDeclarations]: Found specification of procedure put_parallel [2021-11-25 19:39:29,341 INFO L138 BoogieDeclarations]: Found implementation of procedure put_parallel [2021-11-25 19:39:29,341 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_rcu_suspicious [2021-11-25 19:39:29,341 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_rcu_suspicious [2021-11-25 19:39:29,342 INFO L130 BoogieDeclarations]: Found specification of procedure pnfs_generic_pg_init_read [2021-11-25 19:39:29,342 INFO L138 BoogieDeclarations]: Found implementation of procedure pnfs_generic_pg_init_read [2021-11-25 19:39:29,342 INFO L130 BoogieDeclarations]: Found specification of procedure bl_end_io_write [2021-11-25 19:39:29,342 INFO L138 BoogieDeclarations]: Found implementation of procedure bl_end_io_write [2021-11-25 19:39:29,342 INFO L130 BoogieDeclarations]: Found specification of procedure kref_init [2021-11-25 19:39:29,342 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_init [2021-11-25 19:39:29,342 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab64 [2021-11-25 19:39:29,343 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab64 [2021-11-25 19:39:29,343 INFO L130 BoogieDeclarations]: Found specification of procedure PageUptodate [2021-11-25 19:39:29,343 INFO L138 BoogieDeclarations]: Found implementation of procedure PageUptodate [2021-11-25 19:39:29,343 INFO L130 BoogieDeclarations]: Found specification of procedure bio_add_page [2021-11-25 19:39:29,343 INFO L138 BoogieDeclarations]: Found implementation of procedure bio_add_page [2021-11-25 19:39:29,343 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-11-25 19:39:29,344 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-11-25 19:39:29,344 INFO L130 BoogieDeclarations]: Found specification of procedure release_extents [2021-11-25 19:39:29,344 INFO L138 BoogieDeclarations]: Found implementation of procedure release_extents [2021-11-25 19:39:29,344 INFO L130 BoogieDeclarations]: Found specification of procedure PTR_ERR [2021-11-25 19:39:29,344 INFO L138 BoogieDeclarations]: Found implementation of procedure PTR_ERR [2021-11-25 19:39:29,344 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_lock_acquire [2021-11-25 19:39:29,344 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_lock_acquire [2021-11-25 19:39:29,345 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-25 19:39:29,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-25 19:39:29,345 INFO L130 BoogieDeclarations]: Found specification of procedure bl_do_readpage_sync [2021-11-25 19:39:29,345 INFO L138 BoogieDeclarations]: Found implementation of procedure bl_do_readpage_sync [2021-11-25 19:39:29,345 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_work [2021-11-25 19:39:29,345 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_work [2021-11-25 19:39:29,345 INFO L130 BoogieDeclarations]: Found specification of procedure bl_set_layoutdriver [2021-11-25 19:39:29,346 INFO L138 BoogieDeclarations]: Found implementation of procedure bl_set_layoutdriver [2021-11-25 19:39:29,346 INFO L130 BoogieDeclarations]: Found specification of procedure bl_end_io_write_zero [2021-11-25 19:39:29,346 INFO L138 BoogieDeclarations]: Found implementation of procedure bl_end_io_write_zero [2021-11-25 19:39:29,346 INFO L130 BoogieDeclarations]: Found specification of procedure normalize_up [2021-11-25 19:39:29,346 INFO L138 BoogieDeclarations]: Found implementation of procedure normalize_up [2021-11-25 19:39:29,346 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-11-25 19:39:29,347 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-11-25 19:39:29,347 INFO L130 BoogieDeclarations]: Found specification of procedure __kunmap_atomic [2021-11-25 19:39:29,347 INFO L138 BoogieDeclarations]: Found implementation of procedure __kunmap_atomic [2021-11-25 19:39:29,347 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_unlock [2021-11-25 19:39:29,347 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_unlock [2021-11-25 19:39:29,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:39:29,347 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-25 19:39:29,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-25 19:39:29,348 INFO L130 BoogieDeclarations]: Found specification of procedure pnfs_set_lo_fail [2021-11-25 19:39:29,348 INFO L138 BoogieDeclarations]: Found implementation of procedure pnfs_set_lo_fail [2021-11-25 19:39:29,348 INFO L130 BoogieDeclarations]: Found specification of procedure set_to_rw [2021-11-25 19:39:29,348 INFO L138 BoogieDeclarations]: Found implementation of procedure set_to_rw [2021-11-25 19:39:30,414 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:39:30,422 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:39:30,705 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-25 19:39:37,557 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-25 19:39:37,702 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:39:40,028 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:39:40,028 INFO L301 CfgBuilder]: Removed 8 assume(true) statements. [2021-11-25 19:39:40,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:39:40 BoogieIcfgContainer [2021-11-25 19:39:40,035 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:39:40,037 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:39:40,037 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:39:40,041 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:39:40,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:39:22" (1/3) ... [2021-11-25 19:39:40,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6569401e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:39:40, skipping insertion in model container [2021-11-25 19:39:40,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:39:28" (2/3) ... [2021-11-25 19:39:40,043 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6569401e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:39:40, skipping insertion in model container [2021-11-25 19:39:40,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:39:40" (3/3) ... [2021-11-25 19:39:40,044 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-kernel-locking-spinlock_fs-nfs-blocklayout-blocklayoutdriver.cil.i [2021-11-25 19:39:40,050 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:39:40,050 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-25 19:39:40,110 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:39:40,117 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 19:39:40,117 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-25 19:39:40,189 INFO L276 IsEmpty]: Start isEmpty. Operand has 2392 states, 1371 states have (on average 1.2895696571845368) internal successors, (1768), 1420 states have internal predecessors, (1768), 848 states have call successors, (848), 173 states have call predecessors, (848), 172 states have return successors, (841), 826 states have call predecessors, (841), 841 states have call successors, (841) [2021-11-25 19:39:40,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2021-11-25 19:39:40,218 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:39:40,219 INFO L514 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:39:40,220 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 19:39:40,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:39:40,226 INFO L85 PathProgramCache]: Analyzing trace with hash 142751763, now seen corresponding path program 1 times [2021-11-25 19:39:40,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:39:40,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131338453] [2021-11-25 19:39:40,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:39:40,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:39:40,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:39:41,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4556 trivial. 0 not checked. [2021-11-25 19:39:41,084 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:39:41,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131338453] [2021-11-25 19:39:41,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131338453] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:39:41,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:39:41,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:39:41,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073548972] [2021-11-25 19:39:41,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:39:41,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:39:41,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:39:41,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:39:41,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:39:41,144 INFO L87 Difference]: Start difference. First operand has 2392 states, 1371 states have (on average 1.2895696571845368) internal successors, (1768), 1420 states have internal predecessors, (1768), 848 states have call successors, (848), 173 states have call predecessors, (848), 172 states have return successors, (841), 826 states have call predecessors, (841), 841 states have call successors, (841) Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-25 19:39:43,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:39:43,901 INFO L93 Difference]: Finished difference Result 6902 states and 10251 transitions. [2021-11-25 19:39:43,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:39:43,903 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) Word has length 365 [2021-11-25 19:39:43,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:39:43,965 INFO L225 Difference]: With dead ends: 6902 [2021-11-25 19:39:43,965 INFO L226 Difference]: Without dead ends: 4568 [2021-11-25 19:39:43,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:39:43,993 INFO L933 BasicCegarLoop]: 3734 mSDtfsCounter, 3196 mSDsluCounter, 3342 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3196 SdHoareTripleChecker+Valid, 6655 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:39:43,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3196 Valid, 6655 Invalid, 916 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [11 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-25 19:39:44,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4568 states. [2021-11-25 19:39:44,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4568 to 4564. [2021-11-25 19:39:44,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4564 states, 2636 states have (on average 1.2830045523520486) internal successors, (3382), 2737 states have internal predecessors, (3382), 1586 states have call successors, (1586), 340 states have call predecessors, (1586), 339 states have return successors, (1582), 1552 states have call predecessors, (1582), 1582 states have call successors, (1582) [2021-11-25 19:39:44,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4564 states to 4564 states and 6550 transitions. [2021-11-25 19:39:44,493 INFO L78 Accepts]: Start accepts. Automaton has 4564 states and 6550 transitions. Word has length 365 [2021-11-25 19:39:44,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:39:44,500 INFO L470 AbstractCegarLoop]: Abstraction has 4564 states and 6550 transitions. [2021-11-25 19:39:44,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-25 19:39:44,502 INFO L276 IsEmpty]: Start isEmpty. Operand 4564 states and 6550 transitions. [2021-11-25 19:39:44,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2021-11-25 19:39:44,520 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:39:44,521 INFO L514 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:39:44,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:39:44,521 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 19:39:44,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:39:44,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1006261112, now seen corresponding path program 1 times [2021-11-25 19:39:44,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:39:44,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234965554] [2021-11-25 19:39:44,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:39:44,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:39:44,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:39:44,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4556 trivial. 0 not checked. [2021-11-25 19:39:44,955 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:39:44,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234965554] [2021-11-25 19:39:44,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234965554] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:39:44,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:39:44,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:39:44,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052518130] [2021-11-25 19:39:44,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:39:44,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:39:44,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:39:44,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:39:44,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:39:44,966 INFO L87 Difference]: Start difference. First operand 4564 states and 6550 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2021-11-25 19:39:47,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:39:47,249 INFO L93 Difference]: Finished difference Result 11224 states and 16077 transitions. [2021-11-25 19:39:47,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:39:47,250 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) Word has length 379 [2021-11-25 19:39:47,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:39:47,312 INFO L225 Difference]: With dead ends: 11224 [2021-11-25 19:39:47,312 INFO L226 Difference]: Without dead ends: 6729 [2021-11-25 19:39:47,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:39:47,339 INFO L933 BasicCegarLoop]: 3742 mSDtfsCounter, 3166 mSDsluCounter, 3346 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3166 SdHoareTripleChecker+Valid, 6673 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-25 19:39:47,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3166 Valid, 6673 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 915 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-25 19:39:47,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6729 states. [2021-11-25 19:39:47,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6729 to 6696. [2021-11-25 19:39:47,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6696 states, 3859 states have (on average 1.2788287121015807) internal successors, (4935), 4011 states have internal predecessors, (4935), 2321 states have call successors, (2321), 514 states have call predecessors, (2321), 513 states have return successors, (2317), 2267 states have call predecessors, (2317), 2317 states have call successors, (2317) [2021-11-25 19:39:47,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6696 states to 6696 states and 9573 transitions. [2021-11-25 19:39:47,884 INFO L78 Accepts]: Start accepts. Automaton has 6696 states and 9573 transitions. Word has length 379 [2021-11-25 19:39:47,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:39:47,887 INFO L470 AbstractCegarLoop]: Abstraction has 6696 states and 9573 transitions. [2021-11-25 19:39:47,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2021-11-25 19:39:47,889 INFO L276 IsEmpty]: Start isEmpty. Operand 6696 states and 9573 transitions. [2021-11-25 19:39:47,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2021-11-25 19:39:47,898 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:39:47,898 INFO L514 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:39:47,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 19:39:47,917 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 19:39:47,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:39:47,920 INFO L85 PathProgramCache]: Analyzing trace with hash 2049164051, now seen corresponding path program 1 times [2021-11-25 19:39:47,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:39:47,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865683431] [2021-11-25 19:39:47,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:39:47,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:39:48,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:39:48,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4556 trivial. 0 not checked. [2021-11-25 19:39:48,244 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:39:48,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865683431] [2021-11-25 19:39:48,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865683431] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:39:48,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:39:48,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:39:48,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921457485] [2021-11-25 19:39:48,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:39:48,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:39:48,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:39:48,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:39:48,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:39:48,248 INFO L87 Difference]: Start difference. First operand 6696 states and 9573 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2021-11-25 19:39:51,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:39:51,329 INFO L93 Difference]: Finished difference Result 14153 states and 20172 transitions. [2021-11-25 19:39:51,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:39:51,330 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) Word has length 378 [2021-11-25 19:39:51,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:39:51,402 INFO L225 Difference]: With dead ends: 14153 [2021-11-25 19:39:51,403 INFO L226 Difference]: Without dead ends: 7526 [2021-11-25 19:39:51,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:39:51,449 INFO L933 BasicCegarLoop]: 5319 mSDtfsCounter, 3186 mSDsluCounter, 3346 mSDsCounter, 0 mSdLazyCounter, 1221 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3186 SdHoareTripleChecker+Valid, 8250 SdHoareTripleChecker+Invalid, 1228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-25 19:39:51,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3186 Valid, 8250 Invalid, 1228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1221 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-25 19:39:51,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7526 states. [2021-11-25 19:39:51,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7526 to 7493. [2021-11-25 19:39:52,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7493 states, 4347 states have (on average 1.279043018173453) internal successors, (5560), 4516 states have internal predecessors, (5560), 2542 states have call successors, (2542), 602 states have call predecessors, (2542), 601 states have return successors, (2538), 2479 states have call predecessors, (2538), 2538 states have call successors, (2538) [2021-11-25 19:39:52,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7493 states to 7493 states and 10640 transitions. [2021-11-25 19:39:52,047 INFO L78 Accepts]: Start accepts. Automaton has 7493 states and 10640 transitions. Word has length 378 [2021-11-25 19:39:52,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:39:52,048 INFO L470 AbstractCegarLoop]: Abstraction has 7493 states and 10640 transitions. [2021-11-25 19:39:52,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2021-11-25 19:39:52,049 INFO L276 IsEmpty]: Start isEmpty. Operand 7493 states and 10640 transitions. [2021-11-25 19:39:52,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2021-11-25 19:39:52,059 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:39:52,060 INFO L514 BasicCegarLoop]: trace histogram [37, 34, 34, 34, 34, 34, 34, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:39:52,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 19:39:52,060 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 19:39:52,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:39:52,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1096110886, now seen corresponding path program 1 times [2021-11-25 19:39:52,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:39:52,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662061843] [2021-11-25 19:39:52,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:39:52,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:39:52,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:39:52,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4720 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4720 trivial. 0 not checked. [2021-11-25 19:39:52,570 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:39:52,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662061843] [2021-11-25 19:39:52,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662061843] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:39:52,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:39:52,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:39:52,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79180521] [2021-11-25 19:39:52,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:39:52,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:39:52,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:39:52,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:39:52,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:39:52,574 INFO L87 Difference]: Start difference. First operand 7493 states and 10640 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (44), 3 states have call predecessors, (44), 1 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2021-11-25 19:39:55,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:39:55,631 INFO L93 Difference]: Finished difference Result 7499 states and 10645 transitions. [2021-11-25 19:39:55,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:39:55,632 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (44), 3 states have call predecessors, (44), 1 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) Word has length 407 [2021-11-25 19:39:55,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:39:55,698 INFO L225 Difference]: With dead ends: 7499 [2021-11-25 19:39:55,698 INFO L226 Difference]: Without dead ends: 7497 [2021-11-25 19:39:55,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:39:55,705 INFO L933 BasicCegarLoop]: 2958 mSDtfsCounter, 3295 mSDsluCounter, 6777 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3312 SdHoareTripleChecker+Valid, 8855 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:39:55,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3312 Valid, 8855 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1345 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-25 19:39:55,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7497 states. [2021-11-25 19:39:56,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7497 to 7497. [2021-11-25 19:39:56,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7497 states, 4350 states have (on average 1.2788505747126437) internal successors, (5563), 4519 states have internal predecessors, (5563), 2542 states have call successors, (2542), 603 states have call predecessors, (2542), 602 states have return successors, (2538), 2479 states have call predecessors, (2538), 2538 states have call successors, (2538) [2021-11-25 19:39:56,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7497 states to 7497 states and 10643 transitions. [2021-11-25 19:39:56,231 INFO L78 Accepts]: Start accepts. Automaton has 7497 states and 10643 transitions. Word has length 407 [2021-11-25 19:39:56,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:39:56,234 INFO L470 AbstractCegarLoop]: Abstraction has 7497 states and 10643 transitions. [2021-11-25 19:39:56,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (44), 3 states have call predecessors, (44), 1 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2021-11-25 19:39:56,234 INFO L276 IsEmpty]: Start isEmpty. Operand 7497 states and 10643 transitions. [2021-11-25 19:39:56,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2021-11-25 19:39:56,244 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:39:56,245 INFO L514 BasicCegarLoop]: trace histogram [37, 34, 34, 34, 34, 34, 34, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:39:56,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 19:39:56,246 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 19:39:56,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:39:56,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1232310294, now seen corresponding path program 1 times [2021-11-25 19:39:56,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:39:56,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604158424] [2021-11-25 19:39:56,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:39:56,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:39:56,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:39:56,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4722 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4720 trivial. 0 not checked. [2021-11-25 19:39:56,653 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:39:56,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604158424] [2021-11-25 19:39:56,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604158424] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:39:56,654 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:39:56,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:39:56,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186729455] [2021-11-25 19:39:56,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:39:56,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:39:56,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:39:56,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:39:56,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:39:56,658 INFO L87 Difference]: Start difference. First operand 7497 states and 10643 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (45), 3 states have call predecessors, (45), 1 states have return successors, (43), 2 states have call predecessors, (43), 2 states have call successors, (43) [2021-11-25 19:39:58,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:39:58,726 INFO L93 Difference]: Finished difference Result 7503 states and 10648 transitions. [2021-11-25 19:39:58,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:39:58,727 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (45), 3 states have call predecessors, (45), 1 states have return successors, (43), 2 states have call predecessors, (43), 2 states have call successors, (43) Word has length 412 [2021-11-25 19:39:58,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:39:58,771 INFO L225 Difference]: With dead ends: 7503 [2021-11-25 19:39:58,771 INFO L226 Difference]: Without dead ends: 7501 [2021-11-25 19:39:58,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:39:58,776 INFO L933 BasicCegarLoop]: 2961 mSDtfsCounter, 3290 mSDsluCounter, 6777 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3306 SdHoareTripleChecker+Valid, 8858 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-25 19:39:58,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3306 Valid, 8858 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1345 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-25 19:39:58,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7501 states. [2021-11-25 19:39:59,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7501 to 7501. [2021-11-25 19:39:59,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7501 states, 4353 states have (on average 1.2786583965081553) internal successors, (5566), 4522 states have internal predecessors, (5566), 2542 states have call successors, (2542), 604 states have call predecessors, (2542), 603 states have return successors, (2538), 2479 states have call predecessors, (2538), 2538 states have call successors, (2538) [2021-11-25 19:39:59,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7501 states to 7501 states and 10646 transitions. [2021-11-25 19:39:59,288 INFO L78 Accepts]: Start accepts. Automaton has 7501 states and 10646 transitions. Word has length 412 [2021-11-25 19:39:59,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:39:59,289 INFO L470 AbstractCegarLoop]: Abstraction has 7501 states and 10646 transitions. [2021-11-25 19:39:59,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (45), 3 states have call predecessors, (45), 1 states have return successors, (43), 2 states have call predecessors, (43), 2 states have call successors, (43) [2021-11-25 19:39:59,290 INFO L276 IsEmpty]: Start isEmpty. Operand 7501 states and 10646 transitions. [2021-11-25 19:39:59,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2021-11-25 19:39:59,300 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:39:59,300 INFO L514 BasicCegarLoop]: trace histogram [37, 34, 34, 34, 34, 34, 34, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:39:59,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 19:39:59,301 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 19:39:59,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:39:59,302 INFO L85 PathProgramCache]: Analyzing trace with hash 33146214, now seen corresponding path program 1 times [2021-11-25 19:39:59,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:39:59,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613823801] [2021-11-25 19:39:59,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:39:59,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:39:59,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:39:59,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4728 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4724 trivial. 0 not checked. [2021-11-25 19:39:59,664 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:39:59,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613823801] [2021-11-25 19:39:59,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613823801] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:39:59,664 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:39:59,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:39:59,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784899298] [2021-11-25 19:39:59,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:39:59,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:39:59,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:39:59,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:39:59,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:39:59,667 INFO L87 Difference]: Start difference. First operand 7501 states and 10646 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (46), 3 states have call predecessors, (46), 1 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) [2021-11-25 19:40:01,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:40:01,924 INFO L93 Difference]: Finished difference Result 7507 states and 10651 transitions. [2021-11-25 19:40:01,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:40:01,925 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (46), 3 states have call predecessors, (46), 1 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) Word has length 417 [2021-11-25 19:40:01,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:40:01,958 INFO L225 Difference]: With dead ends: 7507 [2021-11-25 19:40:01,959 INFO L226 Difference]: Without dead ends: 7505 [2021-11-25 19:40:01,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:40:01,964 INFO L933 BasicCegarLoop]: 2961 mSDtfsCounter, 3290 mSDsluCounter, 6777 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3305 SdHoareTripleChecker+Valid, 8858 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-25 19:40:01,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3305 Valid, 8858 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1345 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-25 19:40:01,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7505 states. [2021-11-25 19:40:02,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7505 to 7505. [2021-11-25 19:40:02,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7505 states, 4356 states have (on average 1.2784664830119377) internal successors, (5569), 4525 states have internal predecessors, (5569), 2542 states have call successors, (2542), 605 states have call predecessors, (2542), 604 states have return successors, (2538), 2479 states have call predecessors, (2538), 2538 states have call successors, (2538) [2021-11-25 19:40:02,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7505 states to 7505 states and 10649 transitions. [2021-11-25 19:40:02,467 INFO L78 Accepts]: Start accepts. Automaton has 7505 states and 10649 transitions. Word has length 417 [2021-11-25 19:40:02,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:40:02,468 INFO L470 AbstractCegarLoop]: Abstraction has 7505 states and 10649 transitions. [2021-11-25 19:40:02,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (46), 3 states have call predecessors, (46), 1 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) [2021-11-25 19:40:02,468 INFO L276 IsEmpty]: Start isEmpty. Operand 7505 states and 10649 transitions. [2021-11-25 19:40:02,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2021-11-25 19:40:02,480 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:40:02,480 INFO L514 BasicCegarLoop]: trace histogram [37, 34, 34, 34, 34, 34, 34, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:40:02,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 19:40:02,481 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 19:40:02,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:40:02,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1303407318, now seen corresponding path program 1 times [2021-11-25 19:40:02,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:40:02,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867026278] [2021-11-25 19:40:02,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:40:02,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:40:02,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:40:02,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4738 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4732 trivial. 0 not checked. [2021-11-25 19:40:02,812 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:40:02,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867026278] [2021-11-25 19:40:02,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867026278] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:40:02,812 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:40:02,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:40:02,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46856290] [2021-11-25 19:40:02,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:40:02,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:40:02,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:40:02,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:40:02,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:40:02,815 INFO L87 Difference]: Start difference. First operand 7505 states and 10649 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (47), 3 states have call predecessors, (47), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) [2021-11-25 19:40:05,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:40:05,511 INFO L93 Difference]: Finished difference Result 9327 states and 13140 transitions. [2021-11-25 19:40:05,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:40:05,512 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (47), 3 states have call predecessors, (47), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) Word has length 422 [2021-11-25 19:40:05,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:40:05,567 INFO L225 Difference]: With dead ends: 9327 [2021-11-25 19:40:05,567 INFO L226 Difference]: Without dead ends: 9325 [2021-11-25 19:40:05,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:40:05,575 INFO L933 BasicCegarLoop]: 3482 mSDtfsCounter, 3128 mSDsluCounter, 8919 mSDsCounter, 0 mSdLazyCounter, 1642 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3142 SdHoareTripleChecker+Valid, 11281 SdHoareTripleChecker+Invalid, 1644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:40:05,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3142 Valid, 11281 Invalid, 1644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1642 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-25 19:40:05,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9325 states. [2021-11-25 19:40:06,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9325 to 9315. [2021-11-25 19:40:06,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9315 states, 5328 states have (on average 1.2727102102102101) internal successors, (6781), 5581 states have internal predecessors, (6781), 3133 states have call successors, (3133), 867 states have call predecessors, (3133), 851 states have return successors, (3216), 3004 states have call predecessors, (3216), 3129 states have call successors, (3216) [2021-11-25 19:40:06,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9315 states to 9315 states and 13130 transitions. [2021-11-25 19:40:06,265 INFO L78 Accepts]: Start accepts. Automaton has 9315 states and 13130 transitions. Word has length 422 [2021-11-25 19:40:06,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:40:06,266 INFO L470 AbstractCegarLoop]: Abstraction has 9315 states and 13130 transitions. [2021-11-25 19:40:06,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (47), 3 states have call predecessors, (47), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) [2021-11-25 19:40:06,267 INFO L276 IsEmpty]: Start isEmpty. Operand 9315 states and 13130 transitions. [2021-11-25 19:40:06,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2021-11-25 19:40:06,279 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:40:06,279 INFO L514 BasicCegarLoop]: trace histogram [37, 34, 34, 34, 34, 34, 34, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:40:06,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 19:40:06,280 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 19:40:06,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:40:06,299 INFO L85 PathProgramCache]: Analyzing trace with hash 2027296678, now seen corresponding path program 1 times [2021-11-25 19:40:06,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:40:06,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307459915] [2021-11-25 19:40:06,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:40:06,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:40:06,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:40:06,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4752 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4744 trivial. 0 not checked. [2021-11-25 19:40:06,628 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:40:06,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307459915] [2021-11-25 19:40:06,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307459915] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:40:06,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:40:06,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:40:06,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231054900] [2021-11-25 19:40:06,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:40:06,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:40:06,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:40:06,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:40:06,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:40:06,631 INFO L87 Difference]: Start difference. First operand 9315 states and 13130 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (48), 3 states have call predecessors, (48), 1 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) [2021-11-25 19:40:09,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:40:09,230 INFO L93 Difference]: Finished difference Result 9368 states and 13172 transitions. [2021-11-25 19:40:09,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:40:09,231 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (48), 3 states have call predecessors, (48), 1 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) Word has length 427 [2021-11-25 19:40:09,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:40:09,275 INFO L225 Difference]: With dead ends: 9368 [2021-11-25 19:40:09,275 INFO L226 Difference]: Without dead ends: 9366 [2021-11-25 19:40:09,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:40:09,280 INFO L933 BasicCegarLoop]: 2964 mSDtfsCounter, 3269 mSDsluCounter, 6817 mSDsCounter, 0 mSdLazyCounter, 1354 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3282 SdHoareTripleChecker+Valid, 8894 SdHoareTripleChecker+Invalid, 1356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:40:09,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3282 Valid, 8894 Invalid, 1356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1354 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-25 19:40:09,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9366 states. [2021-11-25 19:40:09,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9366 to 9364. [2021-11-25 19:40:09,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9364 states, 5358 states have (on average 1.2717431877566256) internal successors, (6814), 5611 states have internal predecessors, (6814), 3136 states have call successors, (3136), 883 states have call predecessors, (3136), 867 states have return successors, (3219), 3007 states have call predecessors, (3219), 3132 states have call successors, (3219) [2021-11-25 19:40:09,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9364 states to 9364 states and 13169 transitions. [2021-11-25 19:40:09,866 INFO L78 Accepts]: Start accepts. Automaton has 9364 states and 13169 transitions. Word has length 427 [2021-11-25 19:40:09,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:40:09,867 INFO L470 AbstractCegarLoop]: Abstraction has 9364 states and 13169 transitions. [2021-11-25 19:40:09,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (48), 3 states have call predecessors, (48), 1 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) [2021-11-25 19:40:09,867 INFO L276 IsEmpty]: Start isEmpty. Operand 9364 states and 13169 transitions. [2021-11-25 19:40:09,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2021-11-25 19:40:09,876 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:40:09,876 INFO L514 BasicCegarLoop]: trace histogram [37, 34, 34, 34, 34, 34, 34, 6, 5, 5, 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] [2021-11-25 19:40:09,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 19:40:09,877 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 19:40:09,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:40:09,877 INFO L85 PathProgramCache]: Analyzing trace with hash 2143738474, now seen corresponding path program 1 times [2021-11-25 19:40:09,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:40:09,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472459278] [2021-11-25 19:40:09,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:40:09,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:40:09,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:40:10,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4770 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4760 trivial. 0 not checked. [2021-11-25 19:40:10,202 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:40:10,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472459278] [2021-11-25 19:40:10,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472459278] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:40:10,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:40:10,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:40:10,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373786272] [2021-11-25 19:40:10,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:40:10,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:40:10,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:40:10,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:40:10,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:40:10,206 INFO L87 Difference]: Start difference. First operand 9364 states and 13169 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (49), 3 states have call predecessors, (49), 1 states have return successors, (47), 2 states have call predecessors, (47), 2 states have call successors, (47) [2021-11-25 19:40:12,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:40:12,792 INFO L93 Difference]: Finished difference Result 9370 states and 13174 transitions. [2021-11-25 19:40:12,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:40:12,792 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (49), 3 states have call predecessors, (49), 1 states have return successors, (47), 2 states have call predecessors, (47), 2 states have call successors, (47) Word has length 432 [2021-11-25 19:40:12,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:40:12,834 INFO L225 Difference]: With dead ends: 9370 [2021-11-25 19:40:12,834 INFO L226 Difference]: Without dead ends: 9368 [2021-11-25 19:40:12,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:40:12,839 INFO L933 BasicCegarLoop]: 2961 mSDtfsCounter, 3290 mSDsluCounter, 6777 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3302 SdHoareTripleChecker+Valid, 8858 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:40:12,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3302 Valid, 8858 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1345 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-25 19:40:12,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9368 states. [2021-11-25 19:40:13,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9368 to 9368. [2021-11-25 19:40:13,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9368 states, 5361 states have (on average 1.271591121059504) internal successors, (6817), 5614 states have internal predecessors, (6817), 3136 states have call successors, (3136), 884 states have call predecessors, (3136), 868 states have return successors, (3219), 3007 states have call predecessors, (3219), 3132 states have call successors, (3219) [2021-11-25 19:40:13,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9368 states to 9368 states and 13172 transitions. [2021-11-25 19:40:13,457 INFO L78 Accepts]: Start accepts. Automaton has 9368 states and 13172 transitions. Word has length 432 [2021-11-25 19:40:13,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:40:13,458 INFO L470 AbstractCegarLoop]: Abstraction has 9368 states and 13172 transitions. [2021-11-25 19:40:13,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (49), 3 states have call predecessors, (49), 1 states have return successors, (47), 2 states have call predecessors, (47), 2 states have call successors, (47) [2021-11-25 19:40:13,459 INFO L276 IsEmpty]: Start isEmpty. Operand 9368 states and 13172 transitions. [2021-11-25 19:40:13,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2021-11-25 19:40:13,468 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:40:13,468 INFO L514 BasicCegarLoop]: trace histogram [37, 34, 34, 34, 34, 34, 34, 7, 6, 6, 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] [2021-11-25 19:40:13,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 19:40:13,469 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 19:40:13,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:40:13,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1450030618, now seen corresponding path program 1 times [2021-11-25 19:40:13,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:40:13,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906258641] [2021-11-25 19:40:13,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:40:13,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:40:13,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:40:13,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4792 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4780 trivial. 0 not checked. [2021-11-25 19:40:13,783 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:40:13,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906258641] [2021-11-25 19:40:13,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906258641] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:40:13,784 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:40:13,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:40:13,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207545941] [2021-11-25 19:40:13,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:40:13,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:40:13,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:40:13,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:40:13,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:40:13,786 INFO L87 Difference]: Start difference. First operand 9368 states and 13172 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (50), 3 states have call predecessors, (50), 1 states have return successors, (48), 2 states have call predecessors, (48), 2 states have call successors, (48) [2021-11-25 19:40:16,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:40:16,745 INFO L93 Difference]: Finished difference Result 9374 states and 13177 transitions. [2021-11-25 19:40:16,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:40:16,746 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (50), 3 states have call predecessors, (50), 1 states have return successors, (48), 2 states have call predecessors, (48), 2 states have call successors, (48) Word has length 437 [2021-11-25 19:40:16,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:40:16,784 INFO L225 Difference]: With dead ends: 9374 [2021-11-25 19:40:16,784 INFO L226 Difference]: Without dead ends: 9372 [2021-11-25 19:40:16,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:40:16,789 INFO L933 BasicCegarLoop]: 2961 mSDtfsCounter, 3290 mSDsluCounter, 6777 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3301 SdHoareTripleChecker+Valid, 8858 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:40:16,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3301 Valid, 8858 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1345 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-25 19:40:16,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9372 states. [2021-11-25 19:40:17,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9372 to 9372. [2021-11-25 19:40:17,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9372 states, 5364 states have (on average 1.2714392244593586) internal successors, (6820), 5617 states have internal predecessors, (6820), 3136 states have call successors, (3136), 885 states have call predecessors, (3136), 869 states have return successors, (3219), 3007 states have call predecessors, (3219), 3132 states have call successors, (3219) [2021-11-25 19:40:17,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9372 states to 9372 states and 13175 transitions. [2021-11-25 19:40:17,416 INFO L78 Accepts]: Start accepts. Automaton has 9372 states and 13175 transitions. Word has length 437 [2021-11-25 19:40:17,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:40:17,417 INFO L470 AbstractCegarLoop]: Abstraction has 9372 states and 13175 transitions. [2021-11-25 19:40:17,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (50), 3 states have call predecessors, (50), 1 states have return successors, (48), 2 states have call predecessors, (48), 2 states have call successors, (48) [2021-11-25 19:40:17,418 INFO L276 IsEmpty]: Start isEmpty. Operand 9372 states and 13175 transitions. [2021-11-25 19:40:17,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2021-11-25 19:40:17,428 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:40:17,428 INFO L514 BasicCegarLoop]: trace histogram [38, 34, 34, 34, 34, 34, 34, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:40:17,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 19:40:17,429 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 19:40:17,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:40:17,429 INFO L85 PathProgramCache]: Analyzing trace with hash -377069029, now seen corresponding path program 1 times [2021-11-25 19:40:17,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:40:17,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397813054] [2021-11-25 19:40:17,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:40:17,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:40:17,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:40:17,662 INFO L134 CoverageAnalysis]: Checked inductivity of 4800 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4793 trivial. 0 not checked. [2021-11-25 19:40:17,662 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:40:17,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397813054] [2021-11-25 19:40:17,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397813054] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:40:17,663 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:40:17,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:40:17,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30712134] [2021-11-25 19:40:17,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:40:17,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:40:17,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:40:17,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:40:17,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:40:17,666 INFO L87 Difference]: Start difference. First operand 9372 states and 13175 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 3 states have call successors, (49), 2 states have call predecessors, (49), 1 states have return successors, (45), 3 states have call predecessors, (45), 3 states have call successors, (45) [2021-11-25 19:40:20,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:40:20,408 INFO L93 Difference]: Finished difference Result 21656 states and 30440 transitions. [2021-11-25 19:40:20,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:40:20,409 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 3 states have call successors, (49), 2 states have call predecessors, (49), 1 states have return successors, (45), 3 states have call predecessors, (45), 3 states have call successors, (45) Word has length 438 [2021-11-25 19:40:20,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:40:20,469 INFO L225 Difference]: With dead ends: 21656 [2021-11-25 19:40:20,470 INFO L226 Difference]: Without dead ends: 12655 [2021-11-25 19:40:20,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:40:20,522 INFO L933 BasicCegarLoop]: 4078 mSDtfsCounter, 3186 mSDsluCounter, 3344 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3186 SdHoareTripleChecker+Valid, 7007 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:40:20,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3186 Valid, 7007 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 996 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-25 19:40:20,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12655 states. [2021-11-25 19:40:21,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12655 to 12594. [2021-11-25 19:40:21,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12594 states, 7212 states have (on average 1.2720465890183028) internal successors, (9174), 7553 states have internal predecessors, (9174), 4204 states have call successors, (4204), 1196 states have call predecessors, (4204), 1175 states have return successors, (4316), 4029 states have call predecessors, (4316), 4200 states have call successors, (4316) [2021-11-25 19:40:21,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12594 states to 12594 states and 17694 transitions. [2021-11-25 19:40:21,375 INFO L78 Accepts]: Start accepts. Automaton has 12594 states and 17694 transitions. Word has length 438 [2021-11-25 19:40:21,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:40:21,377 INFO L470 AbstractCegarLoop]: Abstraction has 12594 states and 17694 transitions. [2021-11-25 19:40:21,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 3 states have call successors, (49), 2 states have call predecessors, (49), 1 states have return successors, (45), 3 states have call predecessors, (45), 3 states have call successors, (45) [2021-11-25 19:40:21,377 INFO L276 IsEmpty]: Start isEmpty. Operand 12594 states and 17694 transitions. [2021-11-25 19:40:21,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2021-11-25 19:40:21,386 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:40:21,387 INFO L514 BasicCegarLoop]: trace histogram [38, 34, 34, 34, 34, 34, 34, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:40:21,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 19:40:21,387 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 19:40:21,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:40:21,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1089924736, now seen corresponding path program 1 times [2021-11-25 19:40:21,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:40:21,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262881146] [2021-11-25 19:40:21,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:40:21,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:40:21,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:40:21,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4800 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4793 trivial. 0 not checked. [2021-11-25 19:40:21,666 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:40:21,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262881146] [2021-11-25 19:40:21,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262881146] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:40:21,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:40:21,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:40:21,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915776500] [2021-11-25 19:40:21,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:40:21,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:40:21,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:40:21,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:40:21,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:40:21,669 INFO L87 Difference]: Start difference. First operand 12594 states and 17694 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (49), 2 states have call predecessors, (49), 1 states have return successors, (45), 3 states have call predecessors, (45), 3 states have call successors, (45) [2021-11-25 19:40:23,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:40:23,789 INFO L93 Difference]: Finished difference Result 28475 states and 39983 transitions. [2021-11-25 19:40:23,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:40:23,789 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (49), 2 states have call predecessors, (49), 1 states have return successors, (45), 3 states have call predecessors, (45), 3 states have call successors, (45) Word has length 439 [2021-11-25 19:40:23,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:40:23,851 INFO L225 Difference]: With dead ends: 28475 [2021-11-25 19:40:23,851 INFO L226 Difference]: Without dead ends: 16252 [2021-11-25 19:40:23,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:40:23,900 INFO L933 BasicCegarLoop]: 4089 mSDtfsCounter, 3166 mSDsluCounter, 3344 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3166 SdHoareTripleChecker+Valid, 7018 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:40:23,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3166 Valid, 7018 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-25 19:40:23,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16252 states. [2021-11-25 19:40:24,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16252 to 16191. [2021-11-25 19:40:24,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16191 states, 9285 states have (on average 1.272697899838449) internal successors, (11817), 9724 states have internal predecessors, (11817), 5378 states have call successors, (5378), 1551 states have call predecessors, (5378), 1525 states have return successors, (5519), 5151 states have call predecessors, (5519), 5374 states have call successors, (5519) [2021-11-25 19:40:24,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16191 states to 16191 states and 22714 transitions. [2021-11-25 19:40:24,996 INFO L78 Accepts]: Start accepts. Automaton has 16191 states and 22714 transitions. Word has length 439 [2021-11-25 19:40:24,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:40:24,998 INFO L470 AbstractCegarLoop]: Abstraction has 16191 states and 22714 transitions. [2021-11-25 19:40:24,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (49), 2 states have call predecessors, (49), 1 states have return successors, (45), 3 states have call predecessors, (45), 3 states have call successors, (45) [2021-11-25 19:40:24,998 INFO L276 IsEmpty]: Start isEmpty. Operand 16191 states and 22714 transitions. [2021-11-25 19:40:25,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-11-25 19:40:25,009 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:40:25,009 INFO L514 BasicCegarLoop]: trace histogram [37, 34, 34, 34, 34, 34, 34, 8, 7, 7, 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] [2021-11-25 19:40:25,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-25 19:40:25,010 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 19:40:25,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:40:25,011 INFO L85 PathProgramCache]: Analyzing trace with hash 608845738, now seen corresponding path program 1 times [2021-11-25 19:40:25,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:40:25,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418393823] [2021-11-25 19:40:25,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:40:25,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:40:25,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:40:25,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4818 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 4804 trivial. 0 not checked. [2021-11-25 19:40:25,346 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:40:25,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418393823] [2021-11-25 19:40:25,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418393823] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:40:25,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:40:25,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:40:25,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302518303] [2021-11-25 19:40:25,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:40:25,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:40:25,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:40:25,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:40:25,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:40:25,349 INFO L87 Difference]: Start difference. First operand 16191 states and 22714 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (51), 3 states have call predecessors, (51), 1 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) [2021-11-25 19:40:27,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:40:27,840 INFO L93 Difference]: Finished difference Result 16389 states and 22850 transitions. [2021-11-25 19:40:27,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:40:27,840 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (51), 3 states have call predecessors, (51), 1 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) Word has length 442 [2021-11-25 19:40:27,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:40:27,902 INFO L225 Difference]: With dead ends: 16389 [2021-11-25 19:40:27,902 INFO L226 Difference]: Without dead ends: 16387 [2021-11-25 19:40:27,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:40:27,911 INFO L933 BasicCegarLoop]: 2962 mSDtfsCounter, 3157 mSDsluCounter, 6932 mSDsCounter, 0 mSdLazyCounter, 1376 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3167 SdHoareTripleChecker+Valid, 8985 SdHoareTripleChecker+Invalid, 1378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:40:27,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3167 Valid, 8985 Invalid, 1378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1376 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-25 19:40:27,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16387 states. [2021-11-25 19:40:29,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16387 to 16385. [2021-11-25 19:40:29,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16385 states, 9398 states have (on average 1.2704830815067036) internal successors, (11940), 9837 states have internal predecessors, (11940), 5383 states have call successors, (5383), 1627 states have call predecessors, (5383), 1601 states have return successors, (5524), 5156 states have call predecessors, (5524), 5379 states have call successors, (5524) [2021-11-25 19:40:29,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16385 states to 16385 states and 22847 transitions. [2021-11-25 19:40:29,276 INFO L78 Accepts]: Start accepts. Automaton has 16385 states and 22847 transitions. Word has length 442 [2021-11-25 19:40:29,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:40:29,277 INFO L470 AbstractCegarLoop]: Abstraction has 16385 states and 22847 transitions. [2021-11-25 19:40:29,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (51), 3 states have call predecessors, (51), 1 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) [2021-11-25 19:40:29,277 INFO L276 IsEmpty]: Start isEmpty. Operand 16385 states and 22847 transitions. [2021-11-25 19:40:29,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2021-11-25 19:40:29,285 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:40:29,285 INFO L514 BasicCegarLoop]: trace histogram [37, 34, 34, 34, 34, 34, 34, 9, 8, 8, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:40:29,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-25 19:40:29,286 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 19:40:29,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:40:29,286 INFO L85 PathProgramCache]: Analyzing trace with hash 933672511, now seen corresponding path program 1 times [2021-11-25 19:40:29,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:40:29,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092502018] [2021-11-25 19:40:29,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:40:29,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:40:29,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:40:29,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4850 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 4834 trivial. 0 not checked. [2021-11-25 19:40:29,606 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:40:29,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092502018] [2021-11-25 19:40:29,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092502018] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:40:29,607 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:40:29,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:40:29,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673259649] [2021-11-25 19:40:29,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:40:29,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:40:29,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:40:29,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:40:29,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:40:29,609 INFO L87 Difference]: Start difference. First operand 16385 states and 22847 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (58), 3 states have call predecessors, (58), 1 states have return successors, (56), 2 states have call predecessors, (56), 2 states have call successors, (56) [2021-11-25 19:40:32,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:40:32,964 INFO L93 Difference]: Finished difference Result 16391 states and 22852 transitions. [2021-11-25 19:40:32,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:40:32,964 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (58), 3 states have call predecessors, (58), 1 states have return successors, (56), 2 states have call predecessors, (56), 2 states have call successors, (56) Word has length 461 [2021-11-25 19:40:32,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:40:33,015 INFO L225 Difference]: With dead ends: 16391 [2021-11-25 19:40:33,015 INFO L226 Difference]: Without dead ends: 16389 [2021-11-25 19:40:33,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:40:33,020 INFO L933 BasicCegarLoop]: 2961 mSDtfsCounter, 3289 mSDsluCounter, 6777 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3298 SdHoareTripleChecker+Valid, 8858 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-25 19:40:33,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3298 Valid, 8858 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1345 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-25 19:40:33,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16389 states. [2021-11-25 19:40:33,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16389 to 16389. [2021-11-25 19:40:33,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16389 states, 9401 states have (on average 1.2703967663014573) internal successors, (11943), 9840 states have internal predecessors, (11943), 5383 states have call successors, (5383), 1628 states have call predecessors, (5383), 1602 states have return successors, (5524), 5156 states have call predecessors, (5524), 5379 states have call successors, (5524) [2021-11-25 19:40:33,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16389 states to 16389 states and 22850 transitions. [2021-11-25 19:40:33,976 INFO L78 Accepts]: Start accepts. Automaton has 16389 states and 22850 transitions. Word has length 461 [2021-11-25 19:40:33,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:40:33,977 INFO L470 AbstractCegarLoop]: Abstraction has 16389 states and 22850 transitions. [2021-11-25 19:40:33,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (58), 3 states have call predecessors, (58), 1 states have return successors, (56), 2 states have call predecessors, (56), 2 states have call successors, (56) [2021-11-25 19:40:33,978 INFO L276 IsEmpty]: Start isEmpty. Operand 16389 states and 22850 transitions. [2021-11-25 19:40:33,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2021-11-25 19:40:33,990 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:40:33,990 INFO L514 BasicCegarLoop]: trace histogram [37, 34, 34, 34, 34, 34, 34, 10, 9, 9, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:40:33,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-25 19:40:33,991 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 19:40:33,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:40:33,992 INFO L85 PathProgramCache]: Analyzing trace with hash 640864881, now seen corresponding path program 1 times [2021-11-25 19:40:33,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:40:33,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163513362] [2021-11-25 19:40:33,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:40:33,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:40:34,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:40:34,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4884 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4866 trivial. 0 not checked. [2021-11-25 19:40:34,288 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:40:34,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163513362] [2021-11-25 19:40:34,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163513362] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:40:34,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:40:34,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:40:34,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937309079] [2021-11-25 19:40:34,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:40:34,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:40:34,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:40:34,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:40:34,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:40:34,291 INFO L87 Difference]: Start difference. First operand 16389 states and 22850 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (59), 3 states have call predecessors, (59), 1 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) [2021-11-25 19:40:36,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:40:36,593 INFO L93 Difference]: Finished difference Result 16395 states and 22855 transitions. [2021-11-25 19:40:36,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:40:36,593 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (59), 3 states have call predecessors, (59), 1 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) Word has length 466 [2021-11-25 19:40:36,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:40:36,652 INFO L225 Difference]: With dead ends: 16395 [2021-11-25 19:40:36,652 INFO L226 Difference]: Without dead ends: 16393 [2021-11-25 19:40:36,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:40:36,662 INFO L933 BasicCegarLoop]: 2961 mSDtfsCounter, 3289 mSDsluCounter, 6777 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3297 SdHoareTripleChecker+Valid, 8858 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:40:36,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3297 Valid, 8858 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1345 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-25 19:40:36,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16393 states. [2021-11-25 19:40:37,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16393 to 16393. [2021-11-25 19:40:37,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16393 states, 9404 states have (on average 1.2703105061675883) internal successors, (11946), 9843 states have internal predecessors, (11946), 5383 states have call successors, (5383), 1629 states have call predecessors, (5383), 1603 states have return successors, (5524), 5156 states have call predecessors, (5524), 5379 states have call successors, (5524) [2021-11-25 19:40:37,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16393 states to 16393 states and 22853 transitions. [2021-11-25 19:40:37,720 INFO L78 Accepts]: Start accepts. Automaton has 16393 states and 22853 transitions. Word has length 466 [2021-11-25 19:40:37,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:40:37,721 INFO L470 AbstractCegarLoop]: Abstraction has 16393 states and 22853 transitions. [2021-11-25 19:40:37,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (59), 3 states have call predecessors, (59), 1 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) [2021-11-25 19:40:37,722 INFO L276 IsEmpty]: Start isEmpty. Operand 16393 states and 22853 transitions. [2021-11-25 19:40:37,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2021-11-25 19:40:37,734 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:40:37,735 INFO L514 BasicCegarLoop]: trace histogram [37, 34, 34, 34, 34, 34, 34, 11, 10, 10, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:40:37,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-25 19:40:37,735 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 19:40:37,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:40:37,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1924510106, now seen corresponding path program 1 times [2021-11-25 19:40:37,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:40:37,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656077528] [2021-11-25 19:40:37,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:40:37,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:40:37,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:40:38,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4920 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 4900 trivial. 0 not checked. [2021-11-25 19:40:38,038 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:40:38,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656077528] [2021-11-25 19:40:38,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656077528] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:40:38,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:40:38,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:40:38,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236352330] [2021-11-25 19:40:38,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:40:38,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:40:38,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:40:38,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:40:38,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:40:38,043 INFO L87 Difference]: Start difference. First operand 16393 states and 22853 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (54), 3 states have call predecessors, (54), 1 states have return successors, (52), 2 states have call predecessors, (52), 2 states have call successors, (52) [2021-11-25 19:40:41,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:40:41,028 INFO L93 Difference]: Finished difference Result 16399 states and 22858 transitions. [2021-11-25 19:40:41,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:40:41,029 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (54), 3 states have call predecessors, (54), 1 states have return successors, (52), 2 states have call predecessors, (52), 2 states have call successors, (52) Word has length 457 [2021-11-25 19:40:41,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:40:41,074 INFO L225 Difference]: With dead ends: 16399 [2021-11-25 19:40:41,074 INFO L226 Difference]: Without dead ends: 16397 [2021-11-25 19:40:41,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:40:41,082 INFO L933 BasicCegarLoop]: 2961 mSDtfsCounter, 3290 mSDsluCounter, 6777 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3297 SdHoareTripleChecker+Valid, 8858 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:40:41,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3297 Valid, 8858 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1345 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-25 19:40:41,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16397 states. [2021-11-25 19:40:42,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16397 to 16397. [2021-11-25 19:40:42,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16397 states, 9407 states have (on average 1.2702243010524077) internal successors, (11949), 9846 states have internal predecessors, (11949), 5383 states have call successors, (5383), 1630 states have call predecessors, (5383), 1604 states have return successors, (5524), 5156 states have call predecessors, (5524), 5379 states have call successors, (5524) [2021-11-25 19:40:42,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16397 states to 16397 states and 22856 transitions. [2021-11-25 19:40:42,189 INFO L78 Accepts]: Start accepts. Automaton has 16397 states and 22856 transitions. Word has length 457 [2021-11-25 19:40:42,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:40:42,190 INFO L470 AbstractCegarLoop]: Abstraction has 16397 states and 22856 transitions. [2021-11-25 19:40:42,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (54), 3 states have call predecessors, (54), 1 states have return successors, (52), 2 states have call predecessors, (52), 2 states have call successors, (52) [2021-11-25 19:40:42,190 INFO L276 IsEmpty]: Start isEmpty. Operand 16397 states and 22856 transitions. [2021-11-25 19:40:42,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2021-11-25 19:40:42,207 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:40:42,207 INFO L514 BasicCegarLoop]: trace histogram [40, 34, 34, 34, 34, 34, 34, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:40:42,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-25 19:40:42,208 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 19:40:42,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:40:42,208 INFO L85 PathProgramCache]: Analyzing trace with hash 156300879, now seen corresponding path program 1 times [2021-11-25 19:40:42,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:40:42,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342236249] [2021-11-25 19:40:42,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:40:42,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:40:42,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:40:42,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4970 trivial. 0 not checked. [2021-11-25 19:40:42,788 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:40:42,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342236249] [2021-11-25 19:40:42,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342236249] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:40:42,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:40:42,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:40:42,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778337539] [2021-11-25 19:40:42,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:40:42,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:40:42,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:40:42,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:40:42,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:40:42,791 INFO L87 Difference]: Start difference. First operand 16397 states and 22856 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (49), 3 states have call predecessors, (49), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) [2021-11-25 19:40:45,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:40:45,499 INFO L93 Difference]: Finished difference Result 16433 states and 22889 transitions. [2021-11-25 19:40:45,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:40:45,500 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (49), 3 states have call predecessors, (49), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) Word has length 455 [2021-11-25 19:40:45,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:40:45,562 INFO L225 Difference]: With dead ends: 16433 [2021-11-25 19:40:45,562 INFO L226 Difference]: Without dead ends: 16431 [2021-11-25 19:40:45,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:40:45,572 INFO L933 BasicCegarLoop]: 3482 mSDtfsCounter, 3119 mSDsluCounter, 8942 mSDsCounter, 0 mSdLazyCounter, 1631 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3122 SdHoareTripleChecker+Valid, 11302 SdHoareTripleChecker+Invalid, 1634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:40:45,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3122 Valid, 11302 Invalid, 1634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1631 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-25 19:40:45,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16431 states. [2021-11-25 19:40:46,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16431 to 16417. [2021-11-25 19:40:46,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16417 states, 9422 states have (on average 1.2697940989174272) internal successors, (11964), 9861 states have internal predecessors, (11964), 5383 states have call successors, (5383), 1635 states have call predecessors, (5383), 1609 states have return successors, (5524), 5156 states have call predecessors, (5524), 5379 states have call successors, (5524) [2021-11-25 19:40:46,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16417 states to 16417 states and 22871 transitions. [2021-11-25 19:40:46,665 INFO L78 Accepts]: Start accepts. Automaton has 16417 states and 22871 transitions. Word has length 455 [2021-11-25 19:40:46,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:40:46,666 INFO L470 AbstractCegarLoop]: Abstraction has 16417 states and 22871 transitions. [2021-11-25 19:40:46,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (49), 3 states have call predecessors, (49), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) [2021-11-25 19:40:46,666 INFO L276 IsEmpty]: Start isEmpty. Operand 16417 states and 22871 transitions. [2021-11-25 19:40:46,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2021-11-25 19:40:46,776 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:40:46,777 INFO L514 BasicCegarLoop]: trace histogram [37, 34, 34, 34, 34, 34, 34, 12, 11, 11, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:40:46,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-25 19:40:46,777 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 19:40:46,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:40:46,778 INFO L85 PathProgramCache]: Analyzing trace with hash -2116720086, now seen corresponding path program 1 times [2021-11-25 19:40:46,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:40:46,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281325711] [2021-11-25 19:40:46,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:40:46,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:40:46,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:40:47,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4962 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 4940 trivial. 0 not checked. [2021-11-25 19:40:47,122 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:40:47,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281325711] [2021-11-25 19:40:47,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281325711] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:40:47,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:40:47,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:40:47,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528735020] [2021-11-25 19:40:47,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:40:47,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:40:47,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:40:47,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:40:47,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:40:47,125 INFO L87 Difference]: Start difference. First operand 16417 states and 22871 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (55), 3 states have call predecessors, (55), 1 states have return successors, (53), 2 states have call predecessors, (53), 2 states have call successors, (53) [2021-11-25 19:40:49,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:40:49,361 INFO L93 Difference]: Finished difference Result 16423 states and 22876 transitions. [2021-11-25 19:40:49,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:40:49,362 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (55), 3 states have call predecessors, (55), 1 states have return successors, (53), 2 states have call predecessors, (53), 2 states have call successors, (53) Word has length 462 [2021-11-25 19:40:49,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:40:49,415 INFO L225 Difference]: With dead ends: 16423 [2021-11-25 19:40:49,415 INFO L226 Difference]: Without dead ends: 16421 [2021-11-25 19:40:49,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:40:49,422 INFO L933 BasicCegarLoop]: 2961 mSDtfsCounter, 3290 mSDsluCounter, 6777 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3296 SdHoareTripleChecker+Valid, 8858 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:40:49,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3296 Valid, 8858 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1345 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-25 19:40:49,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16421 states. [2021-11-25 19:40:50,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16421 to 16421. [2021-11-25 19:40:50,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16421 states, 9425 states have (on average 1.2697082228116712) internal successors, (11967), 9864 states have internal predecessors, (11967), 5383 states have call successors, (5383), 1636 states have call predecessors, (5383), 1610 states have return successors, (5524), 5156 states have call predecessors, (5524), 5379 states have call successors, (5524) [2021-11-25 19:40:50,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16421 states to 16421 states and 22874 transitions. [2021-11-25 19:40:50,479 INFO L78 Accepts]: Start accepts. Automaton has 16421 states and 22874 transitions. Word has length 462 [2021-11-25 19:40:50,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:40:50,480 INFO L470 AbstractCegarLoop]: Abstraction has 16421 states and 22874 transitions. [2021-11-25 19:40:50,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (55), 3 states have call predecessors, (55), 1 states have return successors, (53), 2 states have call predecessors, (53), 2 states have call successors, (53) [2021-11-25 19:40:50,480 INFO L276 IsEmpty]: Start isEmpty. Operand 16421 states and 22874 transitions. [2021-11-25 19:40:50,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2021-11-25 19:40:50,494 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:40:50,495 INFO L514 BasicCegarLoop]: trace histogram [37, 34, 34, 34, 34, 34, 34, 13, 12, 12, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:40:50,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-25 19:40:50,495 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 19:40:50,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:40:50,496 INFO L85 PathProgramCache]: Analyzing trace with hash 413496383, now seen corresponding path program 1 times [2021-11-25 19:40:50,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:40:50,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207357596] [2021-11-25 19:40:50,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:40:50,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:40:50,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:40:50,801 INFO L134 CoverageAnalysis]: Checked inductivity of 5010 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 4986 trivial. 0 not checked. [2021-11-25 19:40:50,801 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:40:50,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207357596] [2021-11-25 19:40:50,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207357596] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:40:50,801 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:40:50,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:40:50,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111551447] [2021-11-25 19:40:50,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:40:50,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:40:50,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:40:50,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:40:50,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:40:50,805 INFO L87 Difference]: Start difference. First operand 16421 states and 22874 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (62), 3 states have call predecessors, (62), 1 states have return successors, (60), 2 states have call predecessors, (60), 2 states have call successors, (60) [2021-11-25 19:40:52,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:40:52,988 INFO L93 Difference]: Finished difference Result 16427 states and 22879 transitions. [2021-11-25 19:40:52,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:40:52,988 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (62), 3 states have call predecessors, (62), 1 states have return successors, (60), 2 states have call predecessors, (60), 2 states have call successors, (60) Word has length 481 [2021-11-25 19:40:52,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:40:53,049 INFO L225 Difference]: With dead ends: 16427 [2021-11-25 19:40:53,049 INFO L226 Difference]: Without dead ends: 16425 [2021-11-25 19:40:53,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:40:53,057 INFO L933 BasicCegarLoop]: 2961 mSDtfsCounter, 3289 mSDsluCounter, 6777 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3294 SdHoareTripleChecker+Valid, 8858 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:40:53,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3294 Valid, 8858 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1345 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-25 19:40:53,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16425 states. [2021-11-25 19:40:54,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16425 to 16425. [2021-11-25 19:40:54,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16425 states, 9428 states have (on average 1.269622401357658) internal successors, (11970), 9867 states have internal predecessors, (11970), 5383 states have call successors, (5383), 1637 states have call predecessors, (5383), 1611 states have return successors, (5524), 5156 states have call predecessors, (5524), 5379 states have call successors, (5524) [2021-11-25 19:40:54,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16425 states to 16425 states and 22877 transitions. [2021-11-25 19:40:54,268 INFO L78 Accepts]: Start accepts. Automaton has 16425 states and 22877 transitions. Word has length 481 [2021-11-25 19:40:54,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:40:54,269 INFO L470 AbstractCegarLoop]: Abstraction has 16425 states and 22877 transitions. [2021-11-25 19:40:54,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (62), 3 states have call predecessors, (62), 1 states have return successors, (60), 2 states have call predecessors, (60), 2 states have call successors, (60) [2021-11-25 19:40:54,269 INFO L276 IsEmpty]: Start isEmpty. Operand 16425 states and 22877 transitions. [2021-11-25 19:40:54,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2021-11-25 19:40:54,286 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:40:54,286 INFO L514 BasicCegarLoop]: trace histogram [37, 34, 34, 34, 34, 34, 34, 14, 13, 13, 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] [2021-11-25 19:40:54,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-25 19:40:54,287 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 19:40:54,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:40:54,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1066217322, now seen corresponding path program 1 times [2021-11-25 19:40:54,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:40:54,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571670758] [2021-11-25 19:40:54,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:40:54,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:40:54,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:40:54,605 INFO L134 CoverageAnalysis]: Checked inductivity of 5058 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 5032 trivial. 0 not checked. [2021-11-25 19:40:54,605 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:40:54,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571670758] [2021-11-25 19:40:54,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571670758] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:40:54,606 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:40:54,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:40:54,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026958567] [2021-11-25 19:40:54,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:40:54,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:40:54,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:40:54,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:40:54,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:40:54,608 INFO L87 Difference]: Start difference. First operand 16425 states and 22877 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (57), 3 states have call predecessors, (57), 1 states have return successors, (55), 2 states have call predecessors, (55), 2 states have call successors, (55) [2021-11-25 19:40:57,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:40:57,333 INFO L93 Difference]: Finished difference Result 16431 states and 22882 transitions. [2021-11-25 19:40:57,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:40:57,334 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (57), 3 states have call predecessors, (57), 1 states have return successors, (55), 2 states have call predecessors, (55), 2 states have call successors, (55) Word has length 472 [2021-11-25 19:40:57,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:40:57,377 INFO L225 Difference]: With dead ends: 16431 [2021-11-25 19:40:57,378 INFO L226 Difference]: Without dead ends: 16429 [2021-11-25 19:40:57,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:40:57,384 INFO L933 BasicCegarLoop]: 2961 mSDtfsCounter, 3290 mSDsluCounter, 6777 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3294 SdHoareTripleChecker+Valid, 8858 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-25 19:40:57,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3294 Valid, 8858 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1345 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-25 19:40:57,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16429 states. [2021-11-25 19:40:58,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16429 to 16429. [2021-11-25 19:40:58,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16429 states, 9431 states have (on average 1.269536634503234) internal successors, (11973), 9870 states have internal predecessors, (11973), 5383 states have call successors, (5383), 1638 states have call predecessors, (5383), 1612 states have return successors, (5524), 5156 states have call predecessors, (5524), 5379 states have call successors, (5524) [2021-11-25 19:40:58,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16429 states to 16429 states and 22880 transitions. [2021-11-25 19:40:58,599 INFO L78 Accepts]: Start accepts. Automaton has 16429 states and 22880 transitions. Word has length 472 [2021-11-25 19:40:58,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:40:58,600 INFO L470 AbstractCegarLoop]: Abstraction has 16429 states and 22880 transitions. [2021-11-25 19:40:58,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (57), 3 states have call predecessors, (57), 1 states have return successors, (55), 2 states have call predecessors, (55), 2 states have call successors, (55) [2021-11-25 19:40:58,600 INFO L276 IsEmpty]: Start isEmpty. Operand 16429 states and 22880 transitions. [2021-11-25 19:40:58,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2021-11-25 19:40:58,620 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:40:58,620 INFO L514 BasicCegarLoop]: trace histogram [40, 34, 34, 34, 34, 34, 34, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:40:58,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-25 19:40:58,621 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 19:40:58,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:40:58,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1425461334, now seen corresponding path program 1 times [2021-11-25 19:40:58,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:40:58,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090157592] [2021-11-25 19:40:58,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:40:58,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:40:58,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:40:58,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4979 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4979 trivial. 0 not checked. [2021-11-25 19:40:58,864 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:40:58,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090157592] [2021-11-25 19:40:58,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090157592] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:40:58,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:40:58,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:40:58,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629653963] [2021-11-25 19:40:58,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:40:58,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:40:58,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:40:58,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:40:58,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:40:58,867 INFO L87 Difference]: Start difference. First operand 16429 states and 22880 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 2 states have call successors, (53), 2 states have call predecessors, (53), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) [2021-11-25 19:41:01,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:41:01,259 INFO L93 Difference]: Finished difference Result 32542 states and 45815 transitions. [2021-11-25 19:41:01,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:41:01,259 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 2 states have call successors, (53), 2 states have call predecessors, (53), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) Word has length 474 [2021-11-25 19:41:01,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:41:01,468 INFO L225 Difference]: With dead ends: 32542 [2021-11-25 19:41:01,468 INFO L226 Difference]: Without dead ends: 16484 [2021-11-25 19:41:01,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:41:01,514 INFO L933 BasicCegarLoop]: 2962 mSDtfsCounter, 3 mSDsluCounter, 3395 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 5918 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:41:01,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 5918 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 886 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-25 19:41:01,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16484 states. [2021-11-25 19:41:02,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16484 to 16434. [2021-11-25 19:41:02,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16434 states, 9436 states have (on average 1.2693938109368377) internal successors, (11978), 9875 states have internal predecessors, (11978), 5383 states have call successors, (5383), 1638 states have call predecessors, (5383), 1612 states have return successors, (5524), 5156 states have call predecessors, (5524), 5379 states have call successors, (5524) [2021-11-25 19:41:03,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16434 states to 16434 states and 22885 transitions. [2021-11-25 19:41:03,026 INFO L78 Accepts]: Start accepts. Automaton has 16434 states and 22885 transitions. Word has length 474 [2021-11-25 19:41:03,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:41:03,027 INFO L470 AbstractCegarLoop]: Abstraction has 16434 states and 22885 transitions. [2021-11-25 19:41:03,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 2 states have call successors, (53), 2 states have call predecessors, (53), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) [2021-11-25 19:41:03,028 INFO L276 IsEmpty]: Start isEmpty. Operand 16434 states and 22885 transitions. [2021-11-25 19:41:03,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2021-11-25 19:41:03,044 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:41:03,044 INFO L514 BasicCegarLoop]: trace histogram [37, 34, 34, 34, 34, 34, 34, 15, 14, 14, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:41:03,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-25 19:41:03,045 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 19:41:03,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:41:03,045 INFO L85 PathProgramCache]: Analyzing trace with hash -917226689, now seen corresponding path program 1 times [2021-11-25 19:41:03,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:41:03,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909166672] [2021-11-25 19:41:03,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:41:03,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:41:03,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:41:03,444 INFO L134 CoverageAnalysis]: Checked inductivity of 5114 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 5086 trivial. 0 not checked. [2021-11-25 19:41:03,444 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:41:03,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909166672] [2021-11-25 19:41:03,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909166672] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:41:03,444 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:41:03,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:41:03,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505235753] [2021-11-25 19:41:03,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:41:03,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:41:03,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:41:03,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:41:03,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:41:03,447 INFO L87 Difference]: Start difference. First operand 16434 states and 22885 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (64), 3 states have call predecessors, (64), 1 states have return successors, (62), 2 states have call predecessors, (62), 2 states have call successors, (62) [2021-11-25 19:41:05,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:41:05,901 INFO L93 Difference]: Finished difference Result 16440 states and 22890 transitions. [2021-11-25 19:41:05,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:41:05,901 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (64), 3 states have call predecessors, (64), 1 states have return successors, (62), 2 states have call predecessors, (62), 2 states have call successors, (62) Word has length 491 [2021-11-25 19:41:05,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:41:05,974 INFO L225 Difference]: With dead ends: 16440 [2021-11-25 19:41:05,975 INFO L226 Difference]: Without dead ends: 16438 [2021-11-25 19:41:05,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:41:05,985 INFO L933 BasicCegarLoop]: 2961 mSDtfsCounter, 3289 mSDsluCounter, 6777 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3292 SdHoareTripleChecker+Valid, 8858 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:41:05,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3292 Valid, 8858 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1345 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-25 19:41:06,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16438 states. [2021-11-25 19:41:07,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16438 to 16438. [2021-11-25 19:41:07,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16438 states, 9439 states have (on average 1.269308189426846) internal successors, (11981), 9878 states have internal predecessors, (11981), 5383 states have call successors, (5383), 1639 states have call predecessors, (5383), 1613 states have return successors, (5524), 5156 states have call predecessors, (5524), 5379 states have call successors, (5524) [2021-11-25 19:41:07,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16438 states to 16438 states and 22888 transitions. [2021-11-25 19:41:07,208 INFO L78 Accepts]: Start accepts. Automaton has 16438 states and 22888 transitions. Word has length 491 [2021-11-25 19:41:07,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:41:07,208 INFO L470 AbstractCegarLoop]: Abstraction has 16438 states and 22888 transitions. [2021-11-25 19:41:07,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (64), 3 states have call predecessors, (64), 1 states have return successors, (62), 2 states have call predecessors, (62), 2 states have call successors, (62) [2021-11-25 19:41:07,209 INFO L276 IsEmpty]: Start isEmpty. Operand 16438 states and 22888 transitions. [2021-11-25 19:41:07,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2021-11-25 19:41:07,218 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:41:07,218 INFO L514 BasicCegarLoop]: trace histogram [37, 34, 34, 34, 34, 34, 34, 16, 15, 15, 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] [2021-11-25 19:41:07,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-25 19:41:07,219 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 19:41:07,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:41:07,220 INFO L85 PathProgramCache]: Analyzing trace with hash -575597398, now seen corresponding path program 1 times [2021-11-25 19:41:07,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:41:07,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678247083] [2021-11-25 19:41:07,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:41:07,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:41:07,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:41:07,511 INFO L134 CoverageAnalysis]: Checked inductivity of 5170 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 5140 trivial. 0 not checked. [2021-11-25 19:41:07,512 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:41:07,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678247083] [2021-11-25 19:41:07,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678247083] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:41:07,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:41:07,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:41:07,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40975361] [2021-11-25 19:41:07,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:41:07,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:41:07,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:41:07,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:41:07,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:41:07,516 INFO L87 Difference]: Start difference. First operand 16438 states and 22888 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (59), 3 states have call predecessors, (59), 1 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) [2021-11-25 19:41:10,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:41:10,661 INFO L93 Difference]: Finished difference Result 16444 states and 22893 transitions. [2021-11-25 19:41:10,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:41:10,661 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (59), 3 states have call predecessors, (59), 1 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) Word has length 482 [2021-11-25 19:41:10,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:41:10,715 INFO L225 Difference]: With dead ends: 16444 [2021-11-25 19:41:10,715 INFO L226 Difference]: Without dead ends: 16442 [2021-11-25 19:41:10,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:41:10,726 INFO L933 BasicCegarLoop]: 2961 mSDtfsCounter, 3290 mSDsluCounter, 6777 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3292 SdHoareTripleChecker+Valid, 8858 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:41:10,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3292 Valid, 8858 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1345 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-25 19:41:10,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16442 states. [2021-11-25 19:41:12,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16442 to 16442. [2021-11-25 19:41:12,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16442 states, 9442 states have (on average 1.2692226223257785) internal successors, (11984), 9881 states have internal predecessors, (11984), 5383 states have call successors, (5383), 1640 states have call predecessors, (5383), 1614 states have return successors, (5524), 5156 states have call predecessors, (5524), 5379 states have call successors, (5524) [2021-11-25 19:41:12,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16442 states to 16442 states and 22891 transitions. [2021-11-25 19:41:12,116 INFO L78 Accepts]: Start accepts. Automaton has 16442 states and 22891 transitions. Word has length 482 [2021-11-25 19:41:12,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:41:12,117 INFO L470 AbstractCegarLoop]: Abstraction has 16442 states and 22891 transitions. [2021-11-25 19:41:12,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (59), 3 states have call predecessors, (59), 1 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) [2021-11-25 19:41:12,117 INFO L276 IsEmpty]: Start isEmpty. Operand 16442 states and 22891 transitions. [2021-11-25 19:41:12,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2021-11-25 19:41:12,127 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:41:12,127 INFO L514 BasicCegarLoop]: trace histogram [40, 34, 34, 34, 34, 34, 34, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:41:12,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-25 19:41:12,128 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 19:41:12,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:41:12,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1995685088, now seen corresponding path program 1 times [2021-11-25 19:41:12,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:41:12,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055796536] [2021-11-25 19:41:12,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:41:12,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:41:12,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:41:12,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4979 trivial. 0 not checked. [2021-11-25 19:41:12,516 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:41:12,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055796536] [2021-11-25 19:41:12,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055796536] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:41:12,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228815586] [2021-11-25 19:41:12,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:41:12,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:41:12,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db077815-8cfc-4336-ac42-76ffa01d58c0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:41:12,520 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db077815-8cfc-4336-ac42-76ffa01d58c0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:41:12,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db077815-8cfc-4336-ac42-76ffa01d58c0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:41:13,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:41:13,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 3360 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:41:13,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:41:14,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 4875 trivial. 0 not checked. [2021-11-25 19:41:14,409 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:41:14,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228815586] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:41:14,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:41:14,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-25 19:41:14,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757444345] [2021-11-25 19:41:14,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:41:14,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:41:14,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:41:14,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:41:14,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:41:14,412 INFO L87 Difference]: Start difference. First operand 16442 states and 22891 transitions. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 3 states have call successors, (55), 3 states have call predecessors, (55), 3 states have return successors, (51), 3 states have call predecessors, (51), 3 states have call successors, (51) [2021-11-25 19:41:20,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:41:20,590 INFO L93 Difference]: Finished difference Result 36296 states and 50501 transitions. [2021-11-25 19:41:20,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:41:20,591 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 3 states have call successors, (55), 3 states have call predecessors, (55), 3 states have return successors, (51), 3 states have call predecessors, (51), 3 states have call successors, (51) Word has length 480 [2021-11-25 19:41:20,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:41:20,649 INFO L225 Difference]: With dead ends: 36296 [2021-11-25 19:41:20,649 INFO L226 Difference]: Without dead ends: 20225 [2021-11-25 19:41:20,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 479 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:41:20,707 INFO L933 BasicCegarLoop]: 5724 mSDtfsCounter, 3222 mSDsluCounter, 8321 mSDsCounter, 0 mSdLazyCounter, 3754 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3222 SdHoareTripleChecker+Valid, 12805 SdHoareTripleChecker+Invalid, 3761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 3754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-25 19:41:20,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3222 Valid, 12805 Invalid, 3761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 3754 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2021-11-25 19:41:20,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20225 states. [2021-11-25 19:41:22,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20225 to 20128. [2021-11-25 19:41:22,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20128 states, 11579 states have (on average 1.2704896795923655) internal successors, (14711), 12115 states have internal predecessors, (14711), 6562 states have call successors, (6562), 2015 states have call predecessors, (6562), 1984 states have return successors, (6732), 6284 states have call predecessors, (6732), 6558 states have call successors, (6732) [2021-11-25 19:41:22,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20128 states to 20128 states and 28005 transitions. [2021-11-25 19:41:22,165 INFO L78 Accepts]: Start accepts. Automaton has 20128 states and 28005 transitions. Word has length 480 [2021-11-25 19:41:22,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:41:22,166 INFO L470 AbstractCegarLoop]: Abstraction has 20128 states and 28005 transitions. [2021-11-25 19:41:22,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 3 states have call successors, (55), 3 states have call predecessors, (55), 3 states have return successors, (51), 3 states have call predecessors, (51), 3 states have call successors, (51) [2021-11-25 19:41:22,166 INFO L276 IsEmpty]: Start isEmpty. Operand 20128 states and 28005 transitions. [2021-11-25 19:41:22,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2021-11-25 19:41:22,176 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:41:22,176 INFO L514 BasicCegarLoop]: trace histogram [40, 34, 34, 34, 34, 34, 34, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:41:22,201 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db077815-8cfc-4336-ac42-76ffa01d58c0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-25 19:41:22,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db077815-8cfc-4336-ac42-76ffa01d58c0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-25 19:41:22,378 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 19:41:22,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:41:22,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1656603942, now seen corresponding path program 1 times [2021-11-25 19:41:22,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:41:22,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430326711] [2021-11-25 19:41:22,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:41:22,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:41:22,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:41:22,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4981 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4980 trivial. 0 not checked. [2021-11-25 19:41:22,602 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:41:22,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430326711] [2021-11-25 19:41:22,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430326711] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:41:22,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604853848] [2021-11-25 19:41:22,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:41:22,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:41:22,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db077815-8cfc-4336-ac42-76ffa01d58c0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:41:22,604 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db077815-8cfc-4336-ac42-76ffa01d58c0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:41:22,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db077815-8cfc-4336-ac42-76ffa01d58c0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:41:23,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:41:23,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 3362 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:41:23,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:41:24,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4981 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 4875 trivial. 0 not checked. [2021-11-25 19:41:24,523 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:41:24,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604853848] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:41:24,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:41:24,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-25 19:41:24,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163764681] [2021-11-25 19:41:24,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:41:24,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:41:24,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:41:24,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:41:24,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:41:24,526 INFO L87 Difference]: Start difference. First operand 20128 states and 28005 transitions. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 3 states have call successors, (55), 3 states have call predecessors, (55), 3 states have return successors, (51), 3 states have call predecessors, (51), 3 states have call successors, (51) [2021-11-25 19:41:30,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:41:30,660 INFO L93 Difference]: Finished difference Result 44035 states and 61215 transitions. [2021-11-25 19:41:30,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:41:30,661 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 3 states have call successors, (55), 3 states have call predecessors, (55), 3 states have return successors, (51), 3 states have call predecessors, (51), 3 states have call successors, (51) Word has length 482 [2021-11-25 19:41:30,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:41:30,760 INFO L225 Difference]: With dead ends: 44035 [2021-11-25 19:41:30,760 INFO L226 Difference]: Without dead ends: 24278 [2021-11-25 19:41:30,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:41:30,823 INFO L933 BasicCegarLoop]: 5724 mSDtfsCounter, 3231 mSDsluCounter, 4964 mSDsCounter, 0 mSdLazyCounter, 3287 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3231 SdHoareTripleChecker+Valid, 9866 SdHoareTripleChecker+Invalid, 3299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 3287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:41:30,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3231 Valid, 9866 Invalid, 3299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 3287 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-11-25 19:41:30,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24278 states. [2021-11-25 19:41:32,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24278 to 24181. [2021-11-25 19:41:32,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24181 states, 13933 states have (on average 1.2710112682121582) internal successors, (17709), 14576 states have internal predecessors, (17709), 7846 states have call successors, (7846), 2435 states have call predecessors, (7846), 2399 states have return successors, (8045), 7511 states have call predecessors, (8045), 7842 states have call successors, (8045) [2021-11-25 19:41:32,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24181 states to 24181 states and 33600 transitions. [2021-11-25 19:41:32,551 INFO L78 Accepts]: Start accepts. Automaton has 24181 states and 33600 transitions. Word has length 482 [2021-11-25 19:41:32,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:41:32,551 INFO L470 AbstractCegarLoop]: Abstraction has 24181 states and 33600 transitions. [2021-11-25 19:41:32,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 3 states have call successors, (55), 3 states have call predecessors, (55), 3 states have return successors, (51), 3 states have call predecessors, (51), 3 states have call successors, (51) [2021-11-25 19:41:32,552 INFO L276 IsEmpty]: Start isEmpty. Operand 24181 states and 33600 transitions. [2021-11-25 19:41:32,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2021-11-25 19:41:32,565 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:41:32,566 INFO L514 BasicCegarLoop]: trace histogram [37, 34, 34, 34, 34, 34, 34, 17, 16, 16, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:41:32,619 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db077815-8cfc-4336-ac42-76ffa01d58c0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-25 19:41:32,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db077815-8cfc-4336-ac42-76ffa01d58c0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:41:32,791 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 19:41:32,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:41:32,791 INFO L85 PathProgramCache]: Analyzing trace with hash -504892865, now seen corresponding path program 1 times [2021-11-25 19:41:32,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:41:32,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673083919] [2021-11-25 19:41:32,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:41:32,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:41:32,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:41:33,117 INFO L134 CoverageAnalysis]: Checked inductivity of 5234 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 5202 trivial. 0 not checked. [2021-11-25 19:41:33,118 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:41:33,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673083919] [2021-11-25 19:41:33,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673083919] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:41:33,118 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:41:33,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:41:33,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188278020] [2021-11-25 19:41:33,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:41:33,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:41:33,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:41:33,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:41:33,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:41:33,121 INFO L87 Difference]: Start difference. First operand 24181 states and 33600 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (66), 3 states have call predecessors, (66), 1 states have return successors, (64), 2 states have call predecessors, (64), 2 states have call successors, (64) [2021-11-25 19:41:36,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:41:36,038 INFO L93 Difference]: Finished difference Result 24187 states and 33605 transitions. [2021-11-25 19:41:36,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:41:36,039 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (66), 3 states have call predecessors, (66), 1 states have return successors, (64), 2 states have call predecessors, (64), 2 states have call successors, (64) Word has length 501 [2021-11-25 19:41:36,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:41:36,101 INFO L225 Difference]: With dead ends: 24187 [2021-11-25 19:41:36,101 INFO L226 Difference]: Without dead ends: 24183 [2021-11-25 19:41:36,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:41:36,109 INFO L933 BasicCegarLoop]: 2961 mSDtfsCounter, 3289 mSDsluCounter, 6777 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3290 SdHoareTripleChecker+Valid, 8858 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:41:36,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3290 Valid, 8858 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1345 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-25 19:41:36,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24183 states. [2021-11-25 19:41:37,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24183 to 24183. [2021-11-25 19:41:37,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24183 states, 13935 states have (on average 1.2709006099748834) internal successors, (17710), 14577 states have internal predecessors, (17710), 7846 states have call successors, (7846), 2436 states have call predecessors, (7846), 2399 states have return successors, (8045), 7511 states have call predecessors, (8045), 7842 states have call successors, (8045) [2021-11-25 19:41:37,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24183 states to 24183 states and 33601 transitions. [2021-11-25 19:41:37,829 INFO L78 Accepts]: Start accepts. Automaton has 24183 states and 33601 transitions. Word has length 501 [2021-11-25 19:41:37,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:41:37,829 INFO L470 AbstractCegarLoop]: Abstraction has 24183 states and 33601 transitions. [2021-11-25 19:41:37,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (66), 3 states have call predecessors, (66), 1 states have return successors, (64), 2 states have call predecessors, (64), 2 states have call successors, (64) [2021-11-25 19:41:37,829 INFO L276 IsEmpty]: Start isEmpty. Operand 24183 states and 33601 transitions. [2021-11-25 19:41:37,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2021-11-25 19:41:37,839 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:41:37,839 INFO L514 BasicCegarLoop]: trace histogram [37, 34, 34, 34, 34, 34, 34, 18, 17, 17, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:41:37,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-25 19:41:37,839 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 19:41:37,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:41:37,840 INFO L85 PathProgramCache]: Analyzing trace with hash 2035727844, now seen corresponding path program 1 times [2021-11-25 19:41:37,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:41:37,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926390708] [2021-11-25 19:41:37,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:41:37,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:41:37,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:41:38,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5301 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 5267 trivial. 0 not checked. [2021-11-25 19:41:38,123 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:41:38,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926390708] [2021-11-25 19:41:38,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926390708] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:41:38,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:41:38,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:41:38,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421989336] [2021-11-25 19:41:38,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:41:38,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:41:38,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:41:38,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:41:38,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:41:38,126 INFO L87 Difference]: Start difference. First operand 24183 states and 33601 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (67), 3 states have call predecessors, (67), 1 states have return successors, (65), 2 states have call predecessors, (65), 2 states have call successors, (65) [2021-11-25 19:41:41,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:41:41,178 INFO L93 Difference]: Finished difference Result 24183 states and 33601 transitions. [2021-11-25 19:41:41,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:41:41,179 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (67), 3 states have call predecessors, (67), 1 states have return successors, (65), 2 states have call predecessors, (65), 2 states have call successors, (65) Word has length 507 [2021-11-25 19:41:41,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:41:41,245 INFO L225 Difference]: With dead ends: 24183 [2021-11-25 19:41:41,245 INFO L226 Difference]: Without dead ends: 23738 [2021-11-25 19:41:41,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:41:41,257 INFO L933 BasicCegarLoop]: 2959 mSDtfsCounter, 3285 mSDsluCounter, 6776 mSDsCounter, 0 mSdLazyCounter, 1340 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3285 SdHoareTripleChecker+Valid, 8855 SdHoareTripleChecker+Invalid, 1341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-25 19:41:41,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3285 Valid, 8855 Invalid, 1341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1340 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-25 19:41:41,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23738 states. [2021-11-25 19:41:43,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23738 to 23738. [2021-11-25 19:41:43,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23738 states, 13753 states have (on average 1.2709954191812696) internal successors, (17480), 14347 states have internal predecessors, (17480), 7665 states have call successors, (7665), 2353 states have call predecessors, (7665), 2318 states have return successors, (7868), 7379 states have call predecessors, (7868), 7665 states have call successors, (7868) [2021-11-25 19:41:43,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23738 states to 23738 states and 33013 transitions. [2021-11-25 19:41:43,467 INFO L78 Accepts]: Start accepts. Automaton has 23738 states and 33013 transitions. Word has length 507 [2021-11-25 19:41:43,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:41:43,468 INFO L470 AbstractCegarLoop]: Abstraction has 23738 states and 33013 transitions. [2021-11-25 19:41:43,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (67), 3 states have call predecessors, (67), 1 states have return successors, (65), 2 states have call predecessors, (65), 2 states have call successors, (65) [2021-11-25 19:41:43,468 INFO L276 IsEmpty]: Start isEmpty. Operand 23738 states and 33013 transitions. [2021-11-25 19:41:43,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2021-11-25 19:41:43,486 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:41:43,487 INFO L514 BasicCegarLoop]: trace histogram [42, 34, 34, 34, 34, 34, 34, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:41:43,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-25 19:41:43,487 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 19:41:43,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:41:43,488 INFO L85 PathProgramCache]: Analyzing trace with hash 302961141, now seen corresponding path program 1 times [2021-11-25 19:41:43,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:41:43,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823032958] [2021-11-25 19:41:43,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:41:43,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:41:43,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:41:43,709 INFO L134 CoverageAnalysis]: Checked inductivity of 5171 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 5142 trivial. 0 not checked. [2021-11-25 19:41:43,709 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:41:43,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823032958] [2021-11-25 19:41:43,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823032958] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:41:43,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:41:43,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:41:43,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997727071] [2021-11-25 19:41:43,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:41:43,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:41:43,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:41:43,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:41:43,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:41:43,713 INFO L87 Difference]: Start difference. First operand 23738 states and 33013 transitions. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 3 states have call successors, (57), 2 states have call predecessors, (57), 2 states have return successors, (53), 4 states have call predecessors, (53), 3 states have call successors, (53) [2021-11-25 19:41:49,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:41:49,111 INFO L93 Difference]: Finished difference Result 51172 states and 71110 transitions. [2021-11-25 19:41:49,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:41:49,112 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 3 states have call successors, (57), 2 states have call predecessors, (57), 2 states have return successors, (53), 4 states have call predecessors, (53), 3 states have call successors, (53) Word has length 505 [2021-11-25 19:41:49,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:41:49,194 INFO L225 Difference]: With dead ends: 51172 [2021-11-25 19:41:49,194 INFO L226 Difference]: Without dead ends: 27805 [2021-11-25 19:41:49,248 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 [2021-11-25 19:41:49,249 INFO L933 BasicCegarLoop]: 5576 mSDtfsCounter, 3120 mSDsluCounter, 16072 mSDsCounter, 0 mSdLazyCounter, 2986 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3121 SdHoareTripleChecker+Valid, 19592 SdHoareTripleChecker+Invalid, 2989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 2986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:41:49,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3121 Valid, 19592 Invalid, 2989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 2986 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-25 19:41:49,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27805 states. [2021-11-25 19:41:51,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27805 to 27789. [2021-11-25 19:41:51,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27789 states, 16119 states have (on average 1.2705502822755754) internal successors, (20480), 16807 states have internal predecessors, (20480), 8930 states have call successors, (8930), 2774 states have call predecessors, (8930), 2738 states have return successors, (9166), 8604 states have call predecessors, (9166), 8930 states have call successors, (9166) [2021-11-25 19:41:51,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27789 states to 27789 states and 38576 transitions. [2021-11-25 19:41:51,891 INFO L78 Accepts]: Start accepts. Automaton has 27789 states and 38576 transitions. Word has length 505 [2021-11-25 19:41:51,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:41:51,892 INFO L470 AbstractCegarLoop]: Abstraction has 27789 states and 38576 transitions. [2021-11-25 19:41:51,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 3 states have call successors, (57), 2 states have call predecessors, (57), 2 states have return successors, (53), 4 states have call predecessors, (53), 3 states have call successors, (53) [2021-11-25 19:41:51,893 INFO L276 IsEmpty]: Start isEmpty. Operand 27789 states and 38576 transitions. [2021-11-25 19:41:51,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2021-11-25 19:41:51,920 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:41:51,921 INFO L514 BasicCegarLoop]: trace histogram [42, 34, 34, 34, 34, 34, 34, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:41:51,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-25 19:41:51,921 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 19:41:51,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:41:51,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1537328624, now seen corresponding path program 1 times [2021-11-25 19:41:51,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:41:51,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397765826] [2021-11-25 19:41:51,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:41:51,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:41:52,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:41:52,177 INFO L134 CoverageAnalysis]: Checked inductivity of 5171 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 5142 trivial. 0 not checked. [2021-11-25 19:41:52,177 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:41:52,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397765826] [2021-11-25 19:41:52,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397765826] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:41:52,178 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:41:52,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:41:52,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754174794] [2021-11-25 19:41:52,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:41:52,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:41:52,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:41:52,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:41:52,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:41:52,181 INFO L87 Difference]: Start difference. First operand 27789 states and 38576 transitions. Second operand has 5 states, 5 states have (on average 25.2) internal successors, (126), 4 states have internal predecessors, (126), 3 states have call successors, (57), 2 states have call predecessors, (57), 2 states have return successors, (53), 4 states have call predecessors, (53), 3 states have call successors, (53)