./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-calxeda-xgmac.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47f5bc8-4500-45a7-b08e-83d18ac9165d/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47f5bc8-4500-45a7-b08e-83d18ac9165d/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47f5bc8-4500-45a7-b08e-83d18ac9165d/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47f5bc8-4500-45a7-b08e-83d18ac9165d/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-calxeda-xgmac.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47f5bc8-4500-45a7-b08e-83d18ac9165d/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47f5bc8-4500-45a7-b08e-83d18ac9165d/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 3fe54d83d46de95e8e0767545626d085bd64ef94fa067827f6d89c4bc8eb39d0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:15:40,281 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:15:40,283 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:15:40,337 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:15:40,338 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:15:40,342 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:15:40,344 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:15:40,348 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:15:40,351 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:15:40,357 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:15:40,358 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:15:40,360 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:15:40,360 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:15:40,364 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:15:40,368 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:15:40,374 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:15:40,375 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:15:40,377 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:15:40,379 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:15:40,389 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:15:40,391 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:15:40,393 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:15:40,396 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:15:40,397 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:15:40,401 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:15:40,402 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:15:40,402 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:15:40,404 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:15:40,405 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:15:40,407 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:15:40,408 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:15:40,409 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:15:40,411 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:15:40,412 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:15:40,414 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:15:40,414 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:15:40,415 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:15:40,415 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:15:40,415 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:15:40,416 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:15:40,417 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:15:40,418 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47f5bc8-4500-45a7-b08e-83d18ac9165d/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-20 23:15:40,459 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:15:40,462 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:15:40,464 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:15:40,464 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:15:40,471 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:15:40,471 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:15:40,471 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:15:40,471 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:15:40,471 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:15:40,471 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:15:40,472 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:15:40,472 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:15:40,472 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:15:40,472 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:15:40,472 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:15:40,473 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:15:40,473 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:15:40,473 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:15:40,474 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:15:40,474 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:15:40,474 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:15:40,475 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:15:40,475 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:15:40,475 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:15:40,475 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:15:40,475 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:15:40,476 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:15:40,476 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:15:40,476 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:15:40,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:15:40,477 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:15:40,477 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:15:40,477 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:15:40,477 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:15:40,477 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:15:40,478 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:15:40,478 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:15:40,478 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:15:40,478 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_e47f5bc8-4500-45a7-b08e-83d18ac9165d/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47f5bc8-4500-45a7-b08e-83d18ac9165d/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3fe54d83d46de95e8e0767545626d085bd64ef94fa067827f6d89c4bc8eb39d0 [2021-11-20 23:15:40,778 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:15:40,801 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:15:40,804 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:15:40,805 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:15:40,806 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:15:40,807 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47f5bc8-4500-45a7-b08e-83d18ac9165d/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-calxeda-xgmac.cil.i [2021-11-20 23:15:40,883 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47f5bc8-4500-45a7-b08e-83d18ac9165d/bin/utaipan-TEXQjIfE4P/data/c7318253c/5a230254fe4144259f8ad7ec9b1dafbf/FLAG7598be0f0 [2021-11-20 23:15:41,863 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:15:41,864 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47f5bc8-4500-45a7-b08e-83d18ac9165d/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-calxeda-xgmac.cil.i [2021-11-20 23:15:41,945 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47f5bc8-4500-45a7-b08e-83d18ac9165d/bin/utaipan-TEXQjIfE4P/data/c7318253c/5a230254fe4144259f8ad7ec9b1dafbf/FLAG7598be0f0 [2021-11-20 23:15:42,202 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47f5bc8-4500-45a7-b08e-83d18ac9165d/bin/utaipan-TEXQjIfE4P/data/c7318253c/5a230254fe4144259f8ad7ec9b1dafbf [2021-11-20 23:15:42,205 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:15:42,206 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:15:42,208 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:15:42,209 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:15:42,216 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:15:42,217 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:15:42" (1/1) ... [2021-11-20 23:15:42,219 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4316af15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:42, skipping insertion in model container [2021-11-20 23:15:42,219 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:15:42" (1/1) ... [2021-11-20 23:15:42,227 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:15:42,449 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:15:46,067 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_e47f5bc8-4500-45a7-b08e-83d18ac9165d/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-calxeda-xgmac.cil.i[358326,358339] [2021-11-20 23:15:46,070 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_e47f5bc8-4500-45a7-b08e-83d18ac9165d/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-calxeda-xgmac.cil.i[358495,358508] [2021-11-20 23:15:46,072 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_e47f5bc8-4500-45a7-b08e-83d18ac9165d/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-calxeda-xgmac.cil.i[358662,358675] [2021-11-20 23:15:46,072 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_e47f5bc8-4500-45a7-b08e-83d18ac9165d/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-calxeda-xgmac.cil.i[358830,358843] [2021-11-20 23:15:46,095 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:15:46,171 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:15:46,618 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_e47f5bc8-4500-45a7-b08e-83d18ac9165d/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-calxeda-xgmac.cil.i[358326,358339] [2021-11-20 23:15:46,619 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_e47f5bc8-4500-45a7-b08e-83d18ac9165d/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-calxeda-xgmac.cil.i[358495,358508] [2021-11-20 23:15:46,619 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_e47f5bc8-4500-45a7-b08e-83d18ac9165d/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-calxeda-xgmac.cil.i[358662,358675] [2021-11-20 23:15:46,620 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_e47f5bc8-4500-45a7-b08e-83d18ac9165d/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-calxeda-xgmac.cil.i[358830,358843] [2021-11-20 23:15:46,633 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:15:46,944 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:15:46,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:46 WrapperNode [2021-11-20 23:15:46,945 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:15:46,946 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:15:46,946 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:15:46,947 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:15:46,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:46" (1/1) ... [2021-11-20 23:15:47,087 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:46" (1/1) ... [2021-11-20 23:15:47,367 INFO L137 Inliner]: procedures = 502, calls = 2414, calls flagged for inlining = 253, calls inlined = 226, statements flattened = 5408 [2021-11-20 23:15:47,367 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:15:47,368 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:15:47,368 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:15:47,369 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:15:47,377 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:46" (1/1) ... [2021-11-20 23:15:47,378 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:46" (1/1) ... [2021-11-20 23:15:47,414 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:46" (1/1) ... [2021-11-20 23:15:47,416 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:46" (1/1) ... [2021-11-20 23:15:47,626 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:46" (1/1) ... [2021-11-20 23:15:47,657 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:46" (1/1) ... [2021-11-20 23:15:47,695 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:46" (1/1) ... [2021-11-20 23:15:47,744 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:15:47,745 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:15:47,745 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:15:47,746 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:15:47,747 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:46" (1/1) ... [2021-11-20 23:15:47,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:15:47,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47f5bc8-4500-45a7-b08e-83d18ac9165d/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:15:47,793 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47f5bc8-4500-45a7-b08e-83d18ac9165d/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:15:47,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47f5bc8-4500-45a7-b08e-83d18ac9165d/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:15:47,854 INFO L130 BoogieDeclarations]: Found specification of procedure device_set_wakeup_enable [2021-11-20 23:15:47,855 INFO L138 BoogieDeclarations]: Found implementation of procedure device_set_wakeup_enable [2021-11-20 23:15:47,855 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-20 23:15:47,855 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-20 23:15:47,855 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_automaton_state_0_6 [2021-11-20 23:15:47,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_automaton_state_0_6 [2021-11-20 23:15:47,856 INFO L130 BoogieDeclarations]: Found specification of procedure desc_set_buf_addr [2021-11-20 23:15:47,856 INFO L138 BoogieDeclarations]: Found implementation of procedure desc_set_buf_addr [2021-11-20 23:15:47,856 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-20 23:15:47,856 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-20 23:15:47,857 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-20 23:15:47,857 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-20 23:15:47,857 INFO L130 BoogieDeclarations]: Found specification of procedure xgmac_interrupt [2021-11-20 23:15:47,857 INFO L138 BoogieDeclarations]: Found implementation of procedure xgmac_interrupt [2021-11-20 23:15:47,857 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2021-11-20 23:15:47,858 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2021-11-20 23:15:47,858 INFO L130 BoogieDeclarations]: Found specification of procedure xgmac_rx_refill [2021-11-20 23:15:47,858 INFO L138 BoogieDeclarations]: Found implementation of procedure xgmac_rx_refill [2021-11-20 23:15:47,858 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-20 23:15:47,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-20 23:15:47,859 INFO L130 BoogieDeclarations]: Found specification of procedure netif_napi_del [2021-11-20 23:15:47,859 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_napi_del [2021-11-20 23:15:47,859 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2021-11-20 23:15:47,859 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2021-11-20 23:15:47,860 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-11-20 23:15:47,860 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-11-20 23:15:47,860 INFO L130 BoogieDeclarations]: Found specification of procedure xgmac_poll_controller [2021-11-20 23:15:47,860 INFO L138 BoogieDeclarations]: Found implementation of procedure xgmac_poll_controller [2021-11-20 23:15:47,860 INFO L130 BoogieDeclarations]: Found specification of procedure crc32_le [2021-11-20 23:15:47,862 INFO L138 BoogieDeclarations]: Found implementation of procedure crc32_le [2021-11-20 23:15:47,862 INFO L130 BoogieDeclarations]: Found specification of procedure xgmac_set_mac_addr [2021-11-20 23:15:47,862 INFO L138 BoogieDeclarations]: Found implementation of procedure xgmac_set_mac_addr [2021-11-20 23:15:47,862 INFO L130 BoogieDeclarations]: Found specification of procedure __netif_tx_unlock [2021-11-20 23:15:47,863 INFO L138 BoogieDeclarations]: Found implementation of procedure __netif_tx_unlock [2021-11-20 23:15:47,863 INFO L130 BoogieDeclarations]: Found specification of procedure xgmac_tx_timeout [2021-11-20 23:15:47,863 INFO L138 BoogieDeclarations]: Found implementation of procedure xgmac_tx_timeout [2021-11-20 23:15:47,863 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-20 23:15:47,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-20 23:15:47,864 INFO L130 BoogieDeclarations]: Found specification of procedure skb_end_pointer [2021-11-20 23:15:47,864 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_end_pointer [2021-11-20 23:15:47,864 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-20 23:15:47,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-20 23:15:47,865 INFO L130 BoogieDeclarations]: Found specification of procedure platform_get_resource [2021-11-20 23:15:47,866 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_get_resource [2021-11-20 23:15:47,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 23:15:47,867 INFO L130 BoogieDeclarations]: Found specification of procedure iounmap [2021-11-20 23:15:47,867 INFO L138 BoogieDeclarations]: Found implementation of procedure iounmap [2021-11-20 23:15:47,867 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-20 23:15:47,868 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-20 23:15:47,868 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-11-20 23:15:47,868 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-11-20 23:15:47,868 INFO L130 BoogieDeclarations]: Found specification of procedure desc_set_buf_addr_and_size [2021-11-20 23:15:47,868 INFO L138 BoogieDeclarations]: Found implementation of procedure desc_set_buf_addr_and_size [2021-11-20 23:15:47,869 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-20 23:15:47,870 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-20 23:15:47,870 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-20 23:15:47,870 INFO L130 BoogieDeclarations]: Found specification of procedure xgmac_probe [2021-11-20 23:15:47,870 INFO L138 BoogieDeclarations]: Found implementation of procedure xgmac_probe [2021-11-20 23:15:47,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-20 23:15:47,871 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-20 23:15:47,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-20 23:15:47,871 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 23:15:47,872 INFO L130 BoogieDeclarations]: Found specification of procedure desc_set_buf_len [2021-11-20 23:15:47,872 INFO L138 BoogieDeclarations]: Found implementation of procedure desc_set_buf_len [2021-11-20 23:15:47,872 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2021-11-20 23:15:47,872 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2021-11-20 23:15:47,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-20 23:15:47,873 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-20 23:15:47,873 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_interrupt_context [2021-11-20 23:15:47,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_interrupt_context [2021-11-20 23:15:47,873 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2021-11-20 23:15:47,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2021-11-20 23:15:47,874 INFO L130 BoogieDeclarations]: Found specification of procedure xgmac_suspend [2021-11-20 23:15:47,874 INFO L138 BoogieDeclarations]: Found implementation of procedure xgmac_suspend [2021-11-20 23:15:47,874 INFO L130 BoogieDeclarations]: Found specification of procedure __netif_tx_lock [2021-11-20 23:15:47,874 INFO L138 BoogieDeclarations]: Found implementation of procedure __netif_tx_lock [2021-11-20 23:15:47,874 INFO L130 BoogieDeclarations]: Found specification of procedure xgmac_open [2021-11-20 23:15:47,875 INFO L138 BoogieDeclarations]: Found implementation of procedure xgmac_open [2021-11-20 23:15:47,875 INFO L130 BoogieDeclarations]: Found specification of procedure desc_get_buf_len [2021-11-20 23:15:47,876 INFO L138 BoogieDeclarations]: Found implementation of procedure desc_get_buf_len [2021-11-20 23:15:47,876 INFO L130 BoogieDeclarations]: Found specification of procedure napi_enable [2021-11-20 23:15:47,876 INFO L138 BoogieDeclarations]: Found implementation of procedure napi_enable [2021-11-20 23:15:47,877 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-20 23:15:47,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-20 23:15:47,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 23:15:47,878 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_1 [2021-11-20 23:15:47,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_1 [2021-11-20 23:15:47,880 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_2 [2021-11-20 23:15:47,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_2 [2021-11-20 23:15:47,880 INFO L130 BoogieDeclarations]: Found specification of procedure dma_map_single_attrs [2021-11-20 23:15:47,880 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_map_single_attrs [2021-11-20 23:15:47,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:15:47,881 INFO L130 BoogieDeclarations]: Found specification of procedure xgmac_pmt [2021-11-20 23:15:47,881 INFO L138 BoogieDeclarations]: Found implementation of procedure xgmac_pmt [2021-11-20 23:15:47,881 INFO L130 BoogieDeclarations]: Found specification of procedure is_valid_ether_addr [2021-11-20 23:15:47,881 INFO L138 BoogieDeclarations]: Found implementation of procedure is_valid_ether_addr [2021-11-20 23:15:47,882 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-20 23:15:47,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-20 23:15:47,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 23:15:47,883 INFO L130 BoogieDeclarations]: Found specification of procedure xgmac_free_tx_skbufs [2021-11-20 23:15:47,883 INFO L138 BoogieDeclarations]: Found implementation of procedure xgmac_free_tx_skbufs [2021-11-20 23:15:47,883 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-20 23:15:47,884 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-20 23:15:47,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-20 23:15:47,885 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-20 23:15:47,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-20 23:15:47,889 INFO L130 BoogieDeclarations]: Found specification of procedure platform_get_drvdata [2021-11-20 23:15:47,890 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_get_drvdata [2021-11-20 23:15:47,890 INFO L130 BoogieDeclarations]: Found specification of procedure debug_dma_map_page [2021-11-20 23:15:47,890 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_dma_map_page [2021-11-20 23:15:47,891 INFO L130 BoogieDeclarations]: Found specification of procedure napi_disable [2021-11-20 23:15:47,892 INFO L138 BoogieDeclarations]: Found implementation of procedure napi_disable [2021-11-20 23:15:47,892 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-20 23:15:47,892 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-20 23:15:47,892 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2021-11-20 23:15:47,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2021-11-20 23:15:47,899 INFO L130 BoogieDeclarations]: Found specification of procedure device_can_wakeup [2021-11-20 23:15:47,899 INFO L138 BoogieDeclarations]: Found implementation of procedure device_can_wakeup [2021-11-20 23:15:47,900 INFO L130 BoogieDeclarations]: Found specification of procedure dev_name [2021-11-20 23:15:47,900 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_name [2021-11-20 23:15:47,900 INFO L130 BoogieDeclarations]: Found specification of procedure writel [2021-11-20 23:15:47,900 INFO L138 BoogieDeclarations]: Found implementation of procedure writel [2021-11-20 23:15:47,900 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-20 23:15:47,901 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-20 23:15:47,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:15:47,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:15:47,901 INFO L130 BoogieDeclarations]: Found specification of procedure xgmac_mac_disable [2021-11-20 23:15:47,901 INFO L138 BoogieDeclarations]: Found implementation of procedure xgmac_mac_disable [2021-11-20 23:15:47,902 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-20 23:15:47,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-20 23:15:47,902 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-20 23:15:47,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-20 23:15:47,902 INFO L130 BoogieDeclarations]: Found specification of procedure desc_init_tx_desc [2021-11-20 23:15:47,903 INFO L138 BoogieDeclarations]: Found implementation of procedure desc_init_tx_desc [2021-11-20 23:15:47,903 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~int~X~int~X~$Pointer$~TO~~dma_addr_t~0 [2021-11-20 23:15:47,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~int~X~int~X~$Pointer$~TO~~dma_addr_t~0 [2021-11-20 23:15:47,903 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-20 23:15:47,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-20 23:15:47,903 INFO L130 BoogieDeclarations]: Found specification of procedure request_irq [2021-11-20 23:15:47,904 INFO L138 BoogieDeclarations]: Found implementation of procedure request_irq [2021-11-20 23:15:47,904 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_size_call_parameter [2021-11-20 23:15:47,904 INFO L130 BoogieDeclarations]: Found specification of procedure kmemcheck_mark_initialized [2021-11-20 23:15:47,904 INFO L138 BoogieDeclarations]: Found implementation of procedure kmemcheck_mark_initialized [2021-11-20 23:15:47,904 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_process_context [2021-11-20 23:15:47,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_process_context [2021-11-20 23:15:47,905 INFO L130 BoogieDeclarations]: Found specification of procedure bitrev32 [2021-11-20 23:15:47,905 INFO L138 BoogieDeclarations]: Found implementation of procedure bitrev32 [2021-11-20 23:15:47,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-20 23:15:47,905 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-20 23:15:47,906 INFO L130 BoogieDeclarations]: Found specification of procedure __netif_schedule [2021-11-20 23:15:47,906 INFO L138 BoogieDeclarations]: Found implementation of procedure __netif_schedule [2021-11-20 23:15:47,906 INFO L130 BoogieDeclarations]: Found specification of procedure debug_dma_unmap_page [2021-11-20 23:15:47,906 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_dma_unmap_page [2021-11-20 23:15:47,906 INFO L130 BoogieDeclarations]: Found specification of procedure dma_unmap_single_attrs [2021-11-20 23:15:47,907 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_unmap_single_attrs [2021-11-20 23:15:47,907 INFO L130 BoogieDeclarations]: Found specification of procedure xgmac_mac_enable [2021-11-20 23:15:47,908 INFO L138 BoogieDeclarations]: Found implementation of procedure xgmac_mac_enable [2021-11-20 23:15:47,908 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2021-11-20 23:15:47,909 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2021-11-20 23:15:47,909 INFO L130 BoogieDeclarations]: Found specification of procedure netif_start_queue [2021-11-20 23:15:47,910 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_start_queue [2021-11-20 23:15:47,910 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 23:15:47,910 INFO L130 BoogieDeclarations]: Found specification of procedure xgmac_stop [2021-11-20 23:15:47,910 INFO L138 BoogieDeclarations]: Found implementation of procedure xgmac_stop [2021-11-20 23:15:47,910 INFO L130 BoogieDeclarations]: Found specification of procedure desc_set_tx_owner [2021-11-20 23:15:47,910 INFO L138 BoogieDeclarations]: Found implementation of procedure desc_set_tx_owner [2021-11-20 23:15:47,911 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-11-20 23:15:47,911 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-11-20 23:15:47,911 INFO L130 BoogieDeclarations]: Found specification of procedure platform_get_irq [2021-11-20 23:15:47,911 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_get_irq [2021-11-20 23:15:47,911 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 23:15:47,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 23:15:47,912 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-20 23:15:47,912 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-20 23:15:47,912 INFO L130 BoogieDeclarations]: Found specification of procedure dma_mapping_error [2021-11-20 23:15:47,912 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_mapping_error [2021-11-20 23:15:47,913 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-20 23:15:47,913 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-20 23:15:47,913 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_request_irq [2021-11-20 23:15:47,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_request_irq [2021-11-20 23:15:47,913 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-20 23:15:47,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-20 23:15:47,914 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_irq [2021-11-20 23:15:47,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_irq [2021-11-20 23:15:47,914 INFO L130 BoogieDeclarations]: Found specification of procedure xgmac_set_flow_ctrl [2021-11-20 23:15:47,914 INFO L138 BoogieDeclarations]: Found implementation of procedure xgmac_set_flow_ctrl [2021-11-20 23:15:47,915 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-20 23:15:47,915 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-20 23:15:47,915 INFO L130 BoogieDeclarations]: Found specification of procedure xgmac_resume [2021-11-20 23:15:47,915 INFO L138 BoogieDeclarations]: Found implementation of procedure xgmac_resume [2021-11-20 23:15:47,915 INFO L130 BoogieDeclarations]: Found specification of procedure dma_free_attrs [2021-11-20 23:15:47,915 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_free_attrs [2021-11-20 23:15:47,916 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-11-20 23:15:47,916 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-11-20 23:15:47,916 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-20 23:15:47,916 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-20 23:15:47,916 INFO L130 BoogieDeclarations]: Found specification of procedure irq_set_irq_wake [2021-11-20 23:15:47,917 INFO L138 BoogieDeclarations]: Found implementation of procedure irq_set_irq_wake [2021-11-20 23:15:47,917 INFO L130 BoogieDeclarations]: Found specification of procedure desc_get_tx_fs [2021-11-20 23:15:47,917 INFO L138 BoogieDeclarations]: Found implementation of procedure desc_get_tx_fs [2021-11-20 23:15:47,917 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-20 23:15:47,917 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-20 23:15:47,918 INFO L130 BoogieDeclarations]: Found specification of procedure xgmac_set_rx_mode [2021-11-20 23:15:47,918 INFO L138 BoogieDeclarations]: Found implementation of procedure xgmac_set_rx_mode [2021-11-20 23:15:47,918 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2021-11-20 23:15:47,918 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2021-11-20 23:15:47,918 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-20 23:15:47,919 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-20 23:15:47,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 23:15:47,919 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-20 23:15:47,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-20 23:15:47,919 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~$Pointer$~TO~int [2021-11-20 23:15:47,920 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~$Pointer$~TO~int [2021-11-20 23:15:47,920 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2021-11-20 23:15:47,920 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2021-11-20 23:15:47,920 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_any [2021-11-20 23:15:47,920 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_any [2021-11-20 23:15:47,920 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_stop_queue [2021-11-20 23:15:47,921 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_stop_queue [2021-11-20 23:15:47,921 INFO L130 BoogieDeclarations]: Found specification of procedure __readl [2021-11-20 23:15:47,921 INFO L138 BoogieDeclarations]: Found implementation of procedure __readl [2021-11-20 23:15:47,921 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-20 23:15:47,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-20 23:15:47,922 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_work [2021-11-20 23:15:47,922 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_work [2021-11-20 23:15:47,922 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~X~$Pointer$~TO~VOID [2021-11-20 23:15:47,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~X~$Pointer$~TO~VOID [2021-11-20 23:15:47,922 INFO L130 BoogieDeclarations]: Found specification of procedure __writel [2021-11-20 23:15:47,923 INFO L138 BoogieDeclarations]: Found implementation of procedure __writel [2021-11-20 23:15:47,923 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_automaton_state_1_6 [2021-11-20 23:15:47,923 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_automaton_state_1_6 [2021-11-20 23:15:47,923 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-11-20 23:15:47,925 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-11-20 23:15:47,931 INFO L130 BoogieDeclarations]: Found specification of procedure dma_alloc_attrs [2021-11-20 23:15:47,931 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_alloc_attrs [2021-11-20 23:15:47,931 INFO L130 BoogieDeclarations]: Found specification of procedure readl [2021-11-20 23:15:47,931 INFO L138 BoogieDeclarations]: Found implementation of procedure readl [2021-11-20 23:15:47,932 INFO L130 BoogieDeclarations]: Found specification of procedure xgmac_remove [2021-11-20 23:15:47,932 INFO L138 BoogieDeclarations]: Found implementation of procedure xgmac_remove [2021-11-20 23:15:47,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:15:47,932 INFO L130 BoogieDeclarations]: Found specification of procedure desc_get_buf_addr [2021-11-20 23:15:47,932 INFO L138 BoogieDeclarations]: Found implementation of procedure desc_get_buf_addr [2021-11-20 23:15:47,933 INFO L130 BoogieDeclarations]: Found specification of procedure dma_unmap_page [2021-11-20 23:15:47,940 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_unmap_page [2021-11-20 23:15:47,941 INFO L130 BoogieDeclarations]: Found specification of procedure resource_size [2021-11-20 23:15:47,941 INFO L138 BoogieDeclarations]: Found implementation of procedure resource_size [2021-11-20 23:15:47,941 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-20 23:15:47,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-20 23:15:47,941 INFO L130 BoogieDeclarations]: Found specification of procedure desc_get_tx_ls [2021-11-20 23:15:47,942 INFO L138 BoogieDeclarations]: Found implementation of procedure desc_get_tx_ls [2021-11-20 23:15:49,002 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:15:49,005 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:15:49,812 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-20 23:21:39,291 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-20 23:21:39,365 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:21:42,100 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:21:42,101 INFO L301 CfgBuilder]: Removed 10 assume(true) statements. [2021-11-20 23:21:42,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:21:42 BoogieIcfgContainer [2021-11-20 23:21:42,106 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:21:42,108 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:21:42,108 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:21:42,111 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:21:42,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:15:42" (1/3) ... [2021-11-20 23:21:42,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18e84162 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:21:42, skipping insertion in model container [2021-11-20 23:21:42,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:46" (2/3) ... [2021-11-20 23:21:42,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18e84162 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:21:42, skipping insertion in model container [2021-11-20 23:21:42,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:21:42" (3/3) ... [2021-11-20 23:21:42,114 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-calxeda-xgmac.cil.i [2021-11-20 23:21:42,119 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:21:42,119 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-20 23:21:42,189 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:21:42,195 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 23:21:42,195 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-20 23:21:42,255 INFO L276 IsEmpty]: Start isEmpty. Operand has 1536 states, 890 states have (on average 1.2651685393258427) internal successors, (1126), 911 states have internal predecessors, (1126), 528 states have call successors, (528), 116 states have call predecessors, (528), 115 states have return successors, (521), 516 states have call predecessors, (521), 521 states have call successors, (521) [2021-11-20 23:21:42,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-20 23:21:42,272 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:21:42,273 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:21:42,273 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)] === [2021-11-20 23:21:42,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:21:42,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1283422431, now seen corresponding path program 1 times [2021-11-20 23:21:42,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:21:42,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757091200] [2021-11-20 23:21:42,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:21:42,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:21:43,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:21:43,622 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2021-11-20 23:21:43,622 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:21:43,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757091200] [2021-11-20 23:21:43,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757091200] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:21:43,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:21:43,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:21:43,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420186505] [2021-11-20 23:21:43,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:21:43,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:21:43,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:21:43,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:21:43,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:21:43,674 INFO L87 Difference]: Start difference. First operand has 1536 states, 890 states have (on average 1.2651685393258427) internal successors, (1126), 911 states have internal predecessors, (1126), 528 states have call successors, (528), 116 states have call predecessors, (528), 115 states have return successors, (521), 516 states have call predecessors, (521), 521 states have call successors, (521) Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-20 23:21:45,835 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:21:51,419 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:21:51,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:21:51,799 INFO L93 Difference]: Finished difference Result 4489 states and 6433 transitions. [2021-11-20 23:21:51,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:21:51,801 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 147 [2021-11-20 23:21:51,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:21:51,843 INFO L225 Difference]: With dead ends: 4489 [2021-11-20 23:21:51,843 INFO L226 Difference]: Without dead ends: 2968 [2021-11-20 23:21:51,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:21:51,862 INFO L933 BasicCegarLoop]: 2345 mSDtfsCounter, 2071 mSDsluCounter, 2134 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2071 SdHoareTripleChecker+Valid, 4171 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2021-11-20 23:21:51,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2071 Valid, 4171 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 634 Invalid, 1 Unknown, 0 Unchecked, 7.8s Time] [2021-11-20 23:21:51,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2968 states. [2021-11-20 23:21:52,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2968 to 2964. [2021-11-20 23:21:52,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2964 states, 1730 states have (on average 1.2595375722543352) internal successors, (2179), 1770 states have internal predecessors, (2179), 1004 states have call successors, (1004), 228 states have call predecessors, (1004), 227 states have return successors, (1001), 991 states have call predecessors, (1001), 1001 states have call successors, (1001) [2021-11-20 23:21:52,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2964 states to 2964 states and 4184 transitions. [2021-11-20 23:21:52,143 INFO L78 Accepts]: Start accepts. Automaton has 2964 states and 4184 transitions. Word has length 147 [2021-11-20 23:21:52,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:21:52,150 INFO L470 AbstractCegarLoop]: Abstraction has 2964 states and 4184 transitions. [2021-11-20 23:21:52,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-20 23:21:52,152 INFO L276 IsEmpty]: Start isEmpty. Operand 2964 states and 4184 transitions. [2021-11-20 23:21:52,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-20 23:21:52,167 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:21:52,168 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:21:52,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:21:52,169 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)] === [2021-11-20 23:21:52,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:21:52,170 INFO L85 PathProgramCache]: Analyzing trace with hash -58863027, now seen corresponding path program 1 times [2021-11-20 23:21:52,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:21:52,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830762807] [2021-11-20 23:21:52,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:21:52,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:21:52,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:21:52,868 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2021-11-20 23:21:52,870 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:21:52,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830762807] [2021-11-20 23:21:52,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830762807] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:21:52,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:21:52,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:21:52,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990778157] [2021-11-20 23:21:52,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:21:52,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:21:52,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:21:52,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:21:52,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:21:52,878 INFO L87 Difference]: Start difference. First operand 2964 states and 4184 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-20 23:21:54,974 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:22:01,893 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:22:02,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:22:02,285 INFO L93 Difference]: Finished difference Result 8240 states and 11620 transitions. [2021-11-20 23:22:02,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:22:02,285 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 161 [2021-11-20 23:22:02,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:22:02,336 INFO L225 Difference]: With dead ends: 8240 [2021-11-20 23:22:02,336 INFO L226 Difference]: Without dead ends: 5303 [2021-11-20 23:22:02,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:22:02,356 INFO L933 BasicCegarLoop]: 2248 mSDtfsCounter, 1670 mSDsluCounter, 2073 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 7 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1670 SdHoareTripleChecker+Valid, 4030 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:22:02,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1670 Valid, 4030 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 676 Invalid, 2 Unknown, 0 Unchecked, 9.0s Time] [2021-11-20 23:22:02,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5303 states. [2021-11-20 23:22:02,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5303 to 5274. [2021-11-20 23:22:02,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5274 states, 3077 states have (on average 1.2512187195320117) internal successors, (3850), 3151 states have internal predecessors, (3850), 1757 states have call successors, (1757), 440 states have call predecessors, (1757), 437 states have return successors, (1822), 1724 states have call predecessors, (1822), 1754 states have call successors, (1822) [2021-11-20 23:22:02,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5274 states to 5274 states and 7429 transitions. [2021-11-20 23:22:02,676 INFO L78 Accepts]: Start accepts. Automaton has 5274 states and 7429 transitions. Word has length 161 [2021-11-20 23:22:02,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:22:02,678 INFO L470 AbstractCegarLoop]: Abstraction has 5274 states and 7429 transitions. [2021-11-20 23:22:02,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-20 23:22:02,679 INFO L276 IsEmpty]: Start isEmpty. Operand 5274 states and 7429 transitions. [2021-11-20 23:22:02,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-20 23:22:02,684 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:22:02,684 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:22:02,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 23:22:02,685 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)] === [2021-11-20 23:22:02,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:22:02,686 INFO L85 PathProgramCache]: Analyzing trace with hash 39603629, now seen corresponding path program 1 times [2021-11-20 23:22:02,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:22:02,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270266794] [2021-11-20 23:22:02,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:22:02,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:22:02,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:22:03,315 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2021-11-20 23:22:03,315 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:22:03,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270266794] [2021-11-20 23:22:03,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270266794] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:22:03,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:22:03,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:22:03,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651535114] [2021-11-20 23:22:03,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:22:03,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:22:03,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:22:03,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:22:03,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:22:03,317 INFO L87 Difference]: Start difference. First operand 5274 states and 7429 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-20 23:22:05,437 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:22:11,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:22:11,807 INFO L93 Difference]: Finished difference Result 14636 states and 20487 transitions. [2021-11-20 23:22:11,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:22:11,808 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 172 [2021-11-20 23:22:11,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:22:11,887 INFO L225 Difference]: With dead ends: 14636 [2021-11-20 23:22:11,888 INFO L226 Difference]: Without dead ends: 9389 [2021-11-20 23:22:11,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:22:11,927 INFO L933 BasicCegarLoop]: 2677 mSDtfsCounter, 1689 mSDsluCounter, 2060 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 29 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1689 SdHoareTripleChecker+Valid, 4456 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:22:11,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1689 Valid, 4456 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 800 Invalid, 1 Unknown, 0 Unchecked, 8.1s Time] [2021-11-20 23:22:11,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9389 states. [2021-11-20 23:22:12,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9389 to 9356. [2021-11-20 23:22:12,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9356 states, 5429 states have (on average 1.2319027445201696) internal successors, (6688), 5565 states have internal predecessors, (6688), 3095 states have call successors, (3095), 834 states have call predecessors, (3095), 829 states have return successors, (3162), 3032 states have call predecessors, (3162), 3092 states have call successors, (3162) [2021-11-20 23:22:12,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9356 states to 9356 states and 12945 transitions. [2021-11-20 23:22:12,656 INFO L78 Accepts]: Start accepts. Automaton has 9356 states and 12945 transitions. Word has length 172 [2021-11-20 23:22:12,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:22:12,658 INFO L470 AbstractCegarLoop]: Abstraction has 9356 states and 12945 transitions. [2021-11-20 23:22:12,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-20 23:22:12,659 INFO L276 IsEmpty]: Start isEmpty. Operand 9356 states and 12945 transitions. [2021-11-20 23:22:12,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-20 23:22:12,664 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:22:12,664 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 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] [2021-11-20 23:22:12,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 23:22:12,665 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)] === [2021-11-20 23:22:12,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:22:12,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1259576364, now seen corresponding path program 1 times [2021-11-20 23:22:12,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:22:12,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992151050] [2021-11-20 23:22:12,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:22:12,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:22:12,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:22:13,471 INFO L134 CoverageAnalysis]: Checked inductivity of 763 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 763 trivial. 0 not checked. [2021-11-20 23:22:13,472 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:22:13,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992151050] [2021-11-20 23:22:13,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992151050] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:22:13,472 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:22:13,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:22:13,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138932897] [2021-11-20 23:22:13,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:22:13,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:22:13,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:22:13,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:22:13,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:22:13,474 INFO L87 Difference]: Start difference. First operand 9356 states and 12945 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-20 23:22:15,595 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:22:22,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:22:22,157 INFO L93 Difference]: Finished difference Result 9512 states and 13083 transitions. [2021-11-20 23:22:22,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:22:22,157 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 185 [2021-11-20 23:22:22,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:22:22,233 INFO L225 Difference]: With dead ends: 9512 [2021-11-20 23:22:22,234 INFO L226 Difference]: Without dead ends: 9510 [2021-11-20 23:22:22,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:22:22,241 INFO L933 BasicCegarLoop]: 1850 mSDtfsCounter, 2078 mSDsluCounter, 4360 mSDsCounter, 0 mSdLazyCounter, 971 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2089 SdHoareTripleChecker+Valid, 5574 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 971 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:22:22,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2089 Valid, 5574 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 971 Invalid, 1 Unknown, 0 Unchecked, 8.3s Time] [2021-11-20 23:22:22,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9510 states. [2021-11-20 23:22:22,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9510 to 9508. [2021-11-20 23:22:22,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9508 states, 5518 states have (on average 1.230699528814788) internal successors, (6791), 5662 states have internal predecessors, (6791), 3111 states have call successors, (3111), 881 states have call predecessors, (3111), 876 states have return successors, (3178), 3048 states have call predecessors, (3178), 3108 states have call successors, (3178) [2021-11-20 23:22:22,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9508 states to 9508 states and 13080 transitions. [2021-11-20 23:22:22,740 INFO L78 Accepts]: Start accepts. Automaton has 9508 states and 13080 transitions. Word has length 185 [2021-11-20 23:22:22,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:22:22,741 INFO L470 AbstractCegarLoop]: Abstraction has 9508 states and 13080 transitions. [2021-11-20 23:22:22,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-20 23:22:22,741 INFO L276 IsEmpty]: Start isEmpty. Operand 9508 states and 13080 transitions. [2021-11-20 23:22:22,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-20 23:22:22,747 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:22:22,748 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:22:22,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 23:22:22,749 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)] === [2021-11-20 23:22:22,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:22:22,749 INFO L85 PathProgramCache]: Analyzing trace with hash 111996600, now seen corresponding path program 1 times [2021-11-20 23:22:22,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:22:22,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464604618] [2021-11-20 23:22:22,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:22:22,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:22:23,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:22:23,502 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 763 trivial. 0 not checked. [2021-11-20 23:22:23,502 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:22:23,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464604618] [2021-11-20 23:22:23,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464604618] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:22:23,503 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:22:23,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:22:23,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318971454] [2021-11-20 23:22:23,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:22:23,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:22:23,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:22:23,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:22:23,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:22:23,505 INFO L87 Difference]: Start difference. First operand 9508 states and 13080 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-20 23:22:25,631 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:22:30,167 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:22:32,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:22:32,866 INFO L93 Difference]: Finished difference Result 9514 states and 13085 transitions. [2021-11-20 23:22:32,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:22:32,867 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 190 [2021-11-20 23:22:32,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:22:32,920 INFO L225 Difference]: With dead ends: 9514 [2021-11-20 23:22:32,920 INFO L226 Difference]: Without dead ends: 9512 [2021-11-20 23:22:32,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:22:32,928 INFO L933 BasicCegarLoop]: 1832 mSDtfsCounter, 2091 mSDsluCounter, 4273 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2101 SdHoareTripleChecker+Valid, 5477 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:22:32,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2101 Valid, 5477 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 961 Invalid, 1 Unknown, 0 Unchecked, 9.0s Time] [2021-11-20 23:22:32,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9512 states. [2021-11-20 23:22:33,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9512 to 9512. [2021-11-20 23:22:33,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9512 states, 5521 states have (on average 1.2305741713457707) internal successors, (6794), 5665 states have internal predecessors, (6794), 3111 states have call successors, (3111), 882 states have call predecessors, (3111), 877 states have return successors, (3178), 3048 states have call predecessors, (3178), 3108 states have call successors, (3178) [2021-11-20 23:22:33,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9512 states to 9512 states and 13083 transitions. [2021-11-20 23:22:33,561 INFO L78 Accepts]: Start accepts. Automaton has 9512 states and 13083 transitions. Word has length 190 [2021-11-20 23:22:33,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:22:33,564 INFO L470 AbstractCegarLoop]: Abstraction has 9512 states and 13083 transitions. [2021-11-20 23:22:33,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-20 23:22:33,564 INFO L276 IsEmpty]: Start isEmpty. Operand 9512 states and 13083 transitions. [2021-11-20 23:22:33,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-11-20 23:22:33,570 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:22:33,572 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 6, 6, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:22:33,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 23:22:33,572 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)] === [2021-11-20 23:22:33,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:22:33,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1638301850, now seen corresponding path program 1 times [2021-11-20 23:22:33,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:22:33,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975237704] [2021-11-20 23:22:33,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:22:33,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:22:33,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:22:34,250 INFO L134 CoverageAnalysis]: Checked inductivity of 797 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 793 trivial. 0 not checked. [2021-11-20 23:22:34,250 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:22:34,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975237704] [2021-11-20 23:22:34,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975237704] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:22:34,251 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:22:34,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:22:34,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000733008] [2021-11-20 23:22:34,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:22:34,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:22:34,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:22:34,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:22:34,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:22:34,253 INFO L87 Difference]: Start difference. First operand 9512 states and 13083 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-20 23:22:36,376 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:22:39,093 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:22:42,855 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:22:44,429 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:22:46,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:22:46,141 INFO L93 Difference]: Finished difference Result 9518 states and 13088 transitions. [2021-11-20 23:22:46,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:22:46,142 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 204 [2021-11-20 23:22:46,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:22:46,187 INFO L225 Difference]: With dead ends: 9518 [2021-11-20 23:22:46,188 INFO L226 Difference]: Without dead ends: 9516 [2021-11-20 23:22:46,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:22:46,195 INFO L933 BasicCegarLoop]: 1832 mSDtfsCounter, 2087 mSDsluCounter, 4273 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2096 SdHoareTripleChecker+Valid, 5477 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:22:46,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2096 Valid, 5477 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 961 Invalid, 1 Unknown, 0 Unchecked, 11.5s Time] [2021-11-20 23:22:46,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9516 states. [2021-11-20 23:22:46,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9516 to 9516. [2021-11-20 23:22:46,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9516 states, 5524 states have (on average 1.2304489500362057) internal successors, (6797), 5668 states have internal predecessors, (6797), 3111 states have call successors, (3111), 883 states have call predecessors, (3111), 878 states have return successors, (3178), 3048 states have call predecessors, (3178), 3108 states have call successors, (3178) [2021-11-20 23:22:46,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9516 states to 9516 states and 13086 transitions. [2021-11-20 23:22:46,723 INFO L78 Accepts]: Start accepts. Automaton has 9516 states and 13086 transitions. Word has length 204 [2021-11-20 23:22:46,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:22:46,723 INFO L470 AbstractCegarLoop]: Abstraction has 9516 states and 13086 transitions. [2021-11-20 23:22:46,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-20 23:22:46,724 INFO L276 IsEmpty]: Start isEmpty. Operand 9516 states and 13086 transitions. [2021-11-20 23:22:46,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-20 23:22:46,730 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:22:46,730 INFO L514 BasicCegarLoop]: trace histogram [15, 13, 13, 13, 13, 13, 13, 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] [2021-11-20 23:22:46,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 23:22:46,731 INFO L402 AbstractCegarLoop]: === Iteration 7 === 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)] === [2021-11-20 23:22:46,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:22:46,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1933538667, now seen corresponding path program 1 times [2021-11-20 23:22:46,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:22:46,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071544366] [2021-11-20 23:22:46,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:22:46,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:22:46,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:22:47,288 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 678 trivial. 0 not checked. [2021-11-20 23:22:47,288 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:22:47,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071544366] [2021-11-20 23:22:47,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071544366] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:22:47,288 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:22:47,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:22:47,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267460417] [2021-11-20 23:22:47,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:22:47,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:22:47,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:22:47,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:22:47,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:22:47,290 INFO L87 Difference]: Start difference. First operand 9516 states and 13086 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-20 23:22:49,412 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:22:55,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:22:55,925 INFO L93 Difference]: Finished difference Result 18338 states and 25215 transitions. [2021-11-20 23:22:55,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:22:55,926 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 192 [2021-11-20 23:22:55,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:22:55,972 INFO L225 Difference]: With dead ends: 18338 [2021-11-20 23:22:55,973 INFO L226 Difference]: Without dead ends: 8849 [2021-11-20 23:22:56,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:22:56,018 INFO L933 BasicCegarLoop]: 3417 mSDtfsCounter, 2024 mSDsluCounter, 2110 mSDsCounter, 0 mSdLazyCounter, 920 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2024 SdHoareTripleChecker+Valid, 5225 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 920 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:22:56,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2024 Valid, 5225 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 920 Invalid, 1 Unknown, 0 Unchecked, 8.1s Time] [2021-11-20 23:22:56,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8849 states. [2021-11-20 23:22:56,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8849 to 8809. [2021-11-20 23:22:56,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8809 states, 5179 states have (on average 1.229194825255841) internal successors, (6366), 5316 states have internal predecessors, (6366), 2819 states have call successors, (2819), 812 states have call predecessors, (2819), 808 states have return successors, (2884), 2757 states have call predecessors, (2884), 2816 states have call successors, (2884) [2021-11-20 23:22:56,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8809 states to 8809 states and 12069 transitions. [2021-11-20 23:22:56,603 INFO L78 Accepts]: Start accepts. Automaton has 8809 states and 12069 transitions. Word has length 192 [2021-11-20 23:22:56,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:22:56,604 INFO L470 AbstractCegarLoop]: Abstraction has 8809 states and 12069 transitions. [2021-11-20 23:22:56,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-20 23:22:56,604 INFO L276 IsEmpty]: Start isEmpty. Operand 8809 states and 12069 transitions. [2021-11-20 23:22:56,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-20 23:22:56,610 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:22:56,610 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:22:56,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 23:22:56,610 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)] === [2021-11-20 23:22:56,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:22:56,612 INFO L85 PathProgramCache]: Analyzing trace with hash 251647736, now seen corresponding path program 1 times [2021-11-20 23:22:56,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:22:56,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211534634] [2021-11-20 23:22:56,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:22:56,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:22:56,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:22:57,300 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2021-11-20 23:22:57,300 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:22:57,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211534634] [2021-11-20 23:22:57,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211534634] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:22:57,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:22:57,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:22:57,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396628963] [2021-11-20 23:22:57,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:22:57,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:22:57,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:22:57,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:22:57,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:22:57,302 INFO L87 Difference]: Start difference. First operand 8809 states and 12069 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-20 23:22:59,407 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:23:05,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:23:05,674 INFO L93 Difference]: Finished difference Result 8815 states and 12074 transitions. [2021-11-20 23:23:05,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:23:05,675 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 200 [2021-11-20 23:23:05,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:23:05,717 INFO L225 Difference]: With dead ends: 8815 [2021-11-20 23:23:05,717 INFO L226 Difference]: Without dead ends: 8813 [2021-11-20 23:23:05,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:23:05,724 INFO L933 BasicCegarLoop]: 1832 mSDtfsCounter, 2091 mSDsluCounter, 4273 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2099 SdHoareTripleChecker+Valid, 5477 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:23:05,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2099 Valid, 5477 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 961 Invalid, 1 Unknown, 0 Unchecked, 8.0s Time] [2021-11-20 23:23:05,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8813 states. [2021-11-20 23:23:06,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8813 to 8813. [2021-11-20 23:23:06,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8813 states, 5182 states have (on average 1.2290621381705904) internal successors, (6369), 5319 states have internal predecessors, (6369), 2819 states have call successors, (2819), 813 states have call predecessors, (2819), 809 states have return successors, (2884), 2757 states have call predecessors, (2884), 2816 states have call successors, (2884) [2021-11-20 23:23:06,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8813 states to 8813 states and 12072 transitions. [2021-11-20 23:23:06,210 INFO L78 Accepts]: Start accepts. Automaton has 8813 states and 12072 transitions. Word has length 200 [2021-11-20 23:23:06,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:23:06,212 INFO L470 AbstractCegarLoop]: Abstraction has 8813 states and 12072 transitions. [2021-11-20 23:23:06,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-20 23:23:06,213 INFO L276 IsEmpty]: Start isEmpty. Operand 8813 states and 12072 transitions. [2021-11-20 23:23:06,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-11-20 23:23:06,217 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:23:06,218 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 6, 6, 5, 4, 4, 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] [2021-11-20 23:23:06,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 23:23:06,218 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)] === [2021-11-20 23:23:06,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:23:06,219 INFO L85 PathProgramCache]: Analyzing trace with hash -753480102, now seen corresponding path program 1 times [2021-11-20 23:23:06,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:23:06,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043941574] [2021-11-20 23:23:06,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:23:06,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:23:06,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:23:06,840 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 813 trivial. 0 not checked. [2021-11-20 23:23:06,841 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:23:06,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043941574] [2021-11-20 23:23:06,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043941574] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:23:06,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:23:06,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:23:06,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242724548] [2021-11-20 23:23:06,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:23:06,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:23:06,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:23:06,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:23:06,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:23:06,843 INFO L87 Difference]: Start difference. First operand 8813 states and 12072 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-20 23:23:08,961 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:23:15,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:23:15,997 INFO L93 Difference]: Finished difference Result 8819 states and 12077 transitions. [2021-11-20 23:23:15,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:23:15,998 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 214 [2021-11-20 23:23:15,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:23:16,030 INFO L225 Difference]: With dead ends: 8819 [2021-11-20 23:23:16,030 INFO L226 Difference]: Without dead ends: 8817 [2021-11-20 23:23:16,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:23:16,036 INFO L933 BasicCegarLoop]: 1832 mSDtfsCounter, 2087 mSDsluCounter, 4273 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2094 SdHoareTripleChecker+Valid, 5477 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:23:16,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2094 Valid, 5477 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 961 Invalid, 1 Unknown, 0 Unchecked, 8.7s Time] [2021-11-20 23:23:16,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8817 states. [2021-11-20 23:23:16,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8817 to 8817. [2021-11-20 23:23:16,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8817 states, 5185 states have (on average 1.2289296046287368) internal successors, (6372), 5322 states have internal predecessors, (6372), 2819 states have call successors, (2819), 814 states have call predecessors, (2819), 810 states have return successors, (2884), 2757 states have call predecessors, (2884), 2816 states have call successors, (2884) [2021-11-20 23:23:16,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8817 states to 8817 states and 12075 transitions. [2021-11-20 23:23:16,520 INFO L78 Accepts]: Start accepts. Automaton has 8817 states and 12075 transitions. Word has length 214 [2021-11-20 23:23:16,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:23:16,521 INFO L470 AbstractCegarLoop]: Abstraction has 8817 states and 12075 transitions. [2021-11-20 23:23:16,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-20 23:23:16,521 INFO L276 IsEmpty]: Start isEmpty. Operand 8817 states and 12075 transitions. [2021-11-20 23:23:16,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-20 23:23:16,526 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:23:16,528 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 6, 5, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:23:16,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 23:23:16,528 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)] === [2021-11-20 23:23:16,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:23:16,529 INFO L85 PathProgramCache]: Analyzing trace with hash -160489672, now seen corresponding path program 1 times [2021-11-20 23:23:16,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:23:16,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191644527] [2021-11-20 23:23:16,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:23:16,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:23:16,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:23:17,165 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 803 trivial. 0 not checked. [2021-11-20 23:23:17,165 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:23:17,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191644527] [2021-11-20 23:23:17,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191644527] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:23:17,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:23:17,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:23:17,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447068831] [2021-11-20 23:23:17,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:23:17,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:23:17,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:23:17,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:23:17,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:23:17,167 INFO L87 Difference]: Start difference. First operand 8817 states and 12075 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-20 23:23:19,254 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:23:26,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:23:26,423 INFO L93 Difference]: Finished difference Result 8823 states and 12080 transitions. [2021-11-20 23:23:26,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:23:26,423 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 210 [2021-11-20 23:23:26,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:23:26,452 INFO L225 Difference]: With dead ends: 8823 [2021-11-20 23:23:26,452 INFO L226 Difference]: Without dead ends: 8821 [2021-11-20 23:23:26,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:23:26,458 INFO L933 BasicCegarLoop]: 1832 mSDtfsCounter, 2091 mSDsluCounter, 4273 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2097 SdHoareTripleChecker+Valid, 5477 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2021-11-20 23:23:26,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2097 Valid, 5477 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 961 Invalid, 1 Unknown, 0 Unchecked, 8.8s Time] [2021-11-20 23:23:26,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8821 states. [2021-11-20 23:23:26,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8821 to 8821. [2021-11-20 23:23:26,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8821 states, 5188 states have (on average 1.2287972243639167) internal successors, (6375), 5325 states have internal predecessors, (6375), 2819 states have call successors, (2819), 815 states have call predecessors, (2819), 811 states have return successors, (2884), 2757 states have call predecessors, (2884), 2816 states have call successors, (2884) [2021-11-20 23:23:26,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8821 states to 8821 states and 12078 transitions. [2021-11-20 23:23:26,974 INFO L78 Accepts]: Start accepts. Automaton has 8821 states and 12078 transitions. Word has length 210 [2021-11-20 23:23:26,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:23:26,975 INFO L470 AbstractCegarLoop]: Abstraction has 8821 states and 12078 transitions. [2021-11-20 23:23:26,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-20 23:23:26,975 INFO L276 IsEmpty]: Start isEmpty. Operand 8821 states and 12078 transitions. [2021-11-20 23:23:26,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-11-20 23:23:26,981 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:23:26,981 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 7, 6, 6, 6, 6, 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] [2021-11-20 23:23:26,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 23:23:26,982 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:23:26,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:23:26,983 INFO L85 PathProgramCache]: Analyzing trace with hash -800941030, now seen corresponding path program 1 times [2021-11-20 23:23:26,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:23:26,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664508365] [2021-11-20 23:23:26,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:23:26,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:23:27,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:23:27,632 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2021-11-20 23:23:27,632 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:23:27,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664508365] [2021-11-20 23:23:27,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664508365] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:23:27,633 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:23:27,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:23:27,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942339783] [2021-11-20 23:23:27,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:23:27,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:23:27,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:23:27,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:23:27,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:23:27,635 INFO L87 Difference]: Start difference. First operand 8821 states and 12078 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-20 23:23:29,764 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:23:36,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:23:36,597 INFO L93 Difference]: Finished difference Result 8827 states and 12083 transitions. [2021-11-20 23:23:36,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:23:36,708 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 224 [2021-11-20 23:23:36,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:23:36,727 INFO L225 Difference]: With dead ends: 8827 [2021-11-20 23:23:36,728 INFO L226 Difference]: Without dead ends: 8825 [2021-11-20 23:23:36,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:23:36,731 INFO L933 BasicCegarLoop]: 1832 mSDtfsCounter, 2087 mSDsluCounter, 4273 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2092 SdHoareTripleChecker+Valid, 5477 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:23:36,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2092 Valid, 5477 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 961 Invalid, 1 Unknown, 0 Unchecked, 8.5s Time] [2021-11-20 23:23:36,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8825 states. [2021-11-20 23:23:37,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8825 to 8825. [2021-11-20 23:23:37,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8825 states, 5191 states have (on average 1.2286649971103834) internal successors, (6378), 5328 states have internal predecessors, (6378), 2819 states have call successors, (2819), 816 states have call predecessors, (2819), 812 states have return successors, (2884), 2757 states have call predecessors, (2884), 2816 states have call successors, (2884) [2021-11-20 23:23:37,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8825 states to 8825 states and 12081 transitions. [2021-11-20 23:23:37,254 INFO L78 Accepts]: Start accepts. Automaton has 8825 states and 12081 transitions. Word has length 224 [2021-11-20 23:23:37,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:23:37,255 INFO L470 AbstractCegarLoop]: Abstraction has 8825 states and 12081 transitions. [2021-11-20 23:23:37,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-20 23:23:37,256 INFO L276 IsEmpty]: Start isEmpty. Operand 8825 states and 12081 transitions. [2021-11-20 23:23:37,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-11-20 23:23:37,261 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:23:37,261 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 8, 7, 7, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:23:37,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 23:23:37,262 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:23:37,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:23:37,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1292027768, now seen corresponding path program 1 times [2021-11-20 23:23:37,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:23:37,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87466537] [2021-11-20 23:23:37,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:23:37,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:23:37,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:23:37,881 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2021-11-20 23:23:37,881 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:23:37,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87466537] [2021-11-20 23:23:37,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87466537] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:23:37,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:23:37,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:23:37,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425588938] [2021-11-20 23:23:37,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:23:37,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:23:37,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:23:37,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:23:37,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:23:37,883 INFO L87 Difference]: Start difference. First operand 8825 states and 12081 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-20 23:23:40,009 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:23:45,417 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:23:47,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:23:47,284 INFO L93 Difference]: Finished difference Result 8831 states and 12086 transitions. [2021-11-20 23:23:47,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:23:47,285 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 220 [2021-11-20 23:23:47,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:23:47,309 INFO L225 Difference]: With dead ends: 8831 [2021-11-20 23:23:47,309 INFO L226 Difference]: Without dead ends: 8829 [2021-11-20 23:23:47,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:23:47,314 INFO L933 BasicCegarLoop]: 1832 mSDtfsCounter, 2091 mSDsluCounter, 4273 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2095 SdHoareTripleChecker+Valid, 5477 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:23:47,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2095 Valid, 5477 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 961 Invalid, 1 Unknown, 0 Unchecked, 9.0s Time] [2021-11-20 23:23:47,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8829 states. [2021-11-20 23:23:47,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8829 to 8829. [2021-11-20 23:23:47,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8829 states, 5194 states have (on average 1.2285329226030035) internal successors, (6381), 5331 states have internal predecessors, (6381), 2819 states have call successors, (2819), 817 states have call predecessors, (2819), 813 states have return successors, (2884), 2757 states have call predecessors, (2884), 2816 states have call successors, (2884) [2021-11-20 23:23:47,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8829 states to 8829 states and 12084 transitions. [2021-11-20 23:23:47,804 INFO L78 Accepts]: Start accepts. Automaton has 8829 states and 12084 transitions. Word has length 220 [2021-11-20 23:23:47,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:23:47,804 INFO L470 AbstractCegarLoop]: Abstraction has 8829 states and 12084 transitions. [2021-11-20 23:23:47,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-20 23:23:47,805 INFO L276 IsEmpty]: Start isEmpty. Operand 8829 states and 12084 transitions. [2021-11-20 23:23:47,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-11-20 23:23:47,811 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:23:47,812 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 9, 8, 8, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:23:47,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 23:23:47,812 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)] === [2021-11-20 23:23:47,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:23:47,813 INFO L85 PathProgramCache]: Analyzing trace with hash -2067142182, now seen corresponding path program 1 times [2021-11-20 23:23:47,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:23:47,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988906842] [2021-11-20 23:23:47,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:23:47,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:23:48,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:23:48,432 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 901 trivial. 0 not checked. [2021-11-20 23:23:48,432 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:23:48,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988906842] [2021-11-20 23:23:48,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988906842] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:23:48,432 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:23:48,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:23:48,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556882186] [2021-11-20 23:23:48,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:23:48,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:23:48,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:23:48,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:23:48,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:23:48,434 INFO L87 Difference]: Start difference. First operand 8829 states and 12084 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-20 23:23:50,561 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:23:56,028 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:23:58,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:23:58,178 INFO L93 Difference]: Finished difference Result 8835 states and 12089 transitions. [2021-11-20 23:23:58,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:23:58,179 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 234 [2021-11-20 23:23:58,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:23:58,205 INFO L225 Difference]: With dead ends: 8835 [2021-11-20 23:23:58,205 INFO L226 Difference]: Without dead ends: 8833 [2021-11-20 23:23:58,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:23:58,209 INFO L933 BasicCegarLoop]: 1832 mSDtfsCounter, 2087 mSDsluCounter, 4273 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2090 SdHoareTripleChecker+Valid, 5477 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:23:58,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2090 Valid, 5477 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 961 Invalid, 1 Unknown, 0 Unchecked, 9.1s Time] [2021-11-20 23:23:58,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8833 states. [2021-11-20 23:23:58,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8833 to 8833. [2021-11-20 23:23:58,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8833 states, 5197 states have (on average 1.228401000577256) internal successors, (6384), 5334 states have internal predecessors, (6384), 2819 states have call successors, (2819), 818 states have call predecessors, (2819), 814 states have return successors, (2884), 2757 states have call predecessors, (2884), 2816 states have call successors, (2884) [2021-11-20 23:23:58,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8833 states to 8833 states and 12087 transitions. [2021-11-20 23:23:58,731 INFO L78 Accepts]: Start accepts. Automaton has 8833 states and 12087 transitions. Word has length 234 [2021-11-20 23:23:58,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:23:58,732 INFO L470 AbstractCegarLoop]: Abstraction has 8833 states and 12087 transitions. [2021-11-20 23:23:58,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-20 23:23:58,732 INFO L276 IsEmpty]: Start isEmpty. Operand 8833 states and 12087 transitions. [2021-11-20 23:23:58,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-11-20 23:23:58,742 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:23:58,742 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 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] [2021-11-20 23:23:58,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 23:23:58,743 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)] === [2021-11-20 23:23:58,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:23:58,744 INFO L85 PathProgramCache]: Analyzing trace with hash 952291256, now seen corresponding path program 1 times [2021-11-20 23:23:58,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:23:58,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497081759] [2021-11-20 23:23:58,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:23:58,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:23:59,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:23:59,419 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 907 trivial. 0 not checked. [2021-11-20 23:23:59,419 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:23:59,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497081759] [2021-11-20 23:23:59,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497081759] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:23:59,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:23:59,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:23:59,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295843084] [2021-11-20 23:23:59,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:23:59,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:23:59,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:23:59,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:23:59,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:23:59,422 INFO L87 Difference]: Start difference. First operand 8833 states and 12087 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-20 23:24:01,526 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:24:08,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:24:08,734 INFO L93 Difference]: Finished difference Result 8839 states and 12092 transitions. [2021-11-20 23:24:08,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:24:08,735 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 230 [2021-11-20 23:24:08,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:24:08,769 INFO L225 Difference]: With dead ends: 8839 [2021-11-20 23:24:08,769 INFO L226 Difference]: Without dead ends: 8837 [2021-11-20 23:24:08,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:24:08,775 INFO L933 BasicCegarLoop]: 1832 mSDtfsCounter, 2091 mSDsluCounter, 4273 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2093 SdHoareTripleChecker+Valid, 5477 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2021-11-20 23:24:08,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2093 Valid, 5477 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 961 Invalid, 1 Unknown, 0 Unchecked, 8.8s Time] [2021-11-20 23:24:08,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8837 states. [2021-11-20 23:24:09,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8837 to 8837. [2021-11-20 23:24:09,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8837 states, 5200 states have (on average 1.2282692307692307) internal successors, (6387), 5337 states have internal predecessors, (6387), 2819 states have call successors, (2819), 819 states have call predecessors, (2819), 815 states have return successors, (2884), 2757 states have call predecessors, (2884), 2816 states have call successors, (2884) [2021-11-20 23:24:09,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8837 states to 8837 states and 12090 transitions. [2021-11-20 23:24:09,248 INFO L78 Accepts]: Start accepts. Automaton has 8837 states and 12090 transitions. Word has length 230 [2021-11-20 23:24:09,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:24:09,249 INFO L470 AbstractCegarLoop]: Abstraction has 8837 states and 12090 transitions. [2021-11-20 23:24:09,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-20 23:24:09,249 INFO L276 IsEmpty]: Start isEmpty. Operand 8837 states and 12090 transitions. [2021-11-20 23:24:09,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-11-20 23:24:09,257 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:24:09,258 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 11, 10, 10, 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] [2021-11-20 23:24:09,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 23:24:09,259 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)] === [2021-11-20 23:24:09,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:24:09,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1165092972, now seen corresponding path program 1 times [2021-11-20 23:24:09,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:24:09,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142496883] [2021-11-20 23:24:09,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:24:09,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:24:09,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:24:10,091 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 943 trivial. 0 not checked. [2021-11-20 23:24:10,091 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:24:10,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142496883] [2021-11-20 23:24:10,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142496883] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:24:10,092 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:24:10,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:24:10,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408335902] [2021-11-20 23:24:10,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:24:10,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:24:10,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:24:10,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:24:10,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:24:10,094 INFO L87 Difference]: Start difference. First operand 8837 states and 12090 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-20 23:24:12,194 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:24:17,799 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:24:19,576 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:24:21,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:24:21,488 INFO L93 Difference]: Finished difference Result 8881 states and 12120 transitions. [2021-11-20 23:24:21,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:24:21,489 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 235 [2021-11-20 23:24:21,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:24:21,514 INFO L225 Difference]: With dead ends: 8881 [2021-11-20 23:24:21,515 INFO L226 Difference]: Without dead ends: 8877 [2021-11-20 23:24:21,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:24:21,520 INFO L933 BasicCegarLoop]: 1832 mSDtfsCounter, 2044 mSDsluCounter, 4327 mSDsCounter, 0 mSdLazyCounter, 965 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2045 SdHoareTripleChecker+Valid, 5528 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 965 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2021-11-20 23:24:21,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2045 Valid, 5528 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 965 Invalid, 1 Unknown, 0 Unchecked, 10.9s Time] [2021-11-20 23:24:21,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8877 states. [2021-11-20 23:24:21,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8877 to 8875. [2021-11-20 23:24:21,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8875 states, 5224 states have (on average 1.2274119448698315) internal successors, (6412), 5360 states have internal predecessors, (6412), 2819 states have call successors, (2819), 834 states have call predecessors, (2819), 829 states have return successors, (2884), 2757 states have call predecessors, (2884), 2816 states have call successors, (2884) [2021-11-20 23:24:21,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8875 states to 8875 states and 12115 transitions. [2021-11-20 23:24:21,977 INFO L78 Accepts]: Start accepts. Automaton has 8875 states and 12115 transitions. Word has length 235 [2021-11-20 23:24:21,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:24:21,978 INFO L470 AbstractCegarLoop]: Abstraction has 8875 states and 12115 transitions. [2021-11-20 23:24:21,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-20 23:24:21,978 INFO L276 IsEmpty]: Start isEmpty. Operand 8875 states and 12115 transitions. [2021-11-20 23:24:21,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-11-20 23:24:21,985 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:24:21,986 INFO L514 BasicCegarLoop]: trace histogram [18, 13, 13, 13, 13, 13, 13, 5, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:24:21,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 23:24:21,986 INFO L402 AbstractCegarLoop]: === Iteration 16 === 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)] === [2021-11-20 23:24:21,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:24:21,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1384600938, now seen corresponding path program 1 times [2021-11-20 23:24:21,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:24:21,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42308166] [2021-11-20 23:24:21,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:24:21,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:24:22,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:24:22,588 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2021-11-20 23:24:22,588 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:24:22,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42308166] [2021-11-20 23:24:22,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42308166] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:24:22,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:24:22,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:24:22,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039257713] [2021-11-20 23:24:22,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:24:22,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:24:22,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:24:22,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:24:22,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:24:22,591 INFO L87 Difference]: Start difference. First operand 8875 states and 12115 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-20 23:24:24,737 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:24:32,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:24:32,465 INFO L93 Difference]: Finished difference Result 21453 states and 29334 transitions. [2021-11-20 23:24:32,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:24:32,466 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) Word has length 235 [2021-11-20 23:24:32,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:24:32,499 INFO L225 Difference]: With dead ends: 21453 [2021-11-20 23:24:32,500 INFO L226 Difference]: Without dead ends: 12756 [2021-11-20 23:24:32,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:24:32,535 INFO L933 BasicCegarLoop]: 3526 mSDtfsCounter, 2021 mSDsluCounter, 2106 mSDsCounter, 0 mSdLazyCounter, 954 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2021 SdHoareTripleChecker+Valid, 5330 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 954 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:24:32,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2021 Valid, 5330 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 954 Invalid, 1 Unknown, 0 Unchecked, 9.1s Time] [2021-11-20 23:24:32,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12756 states. [2021-11-20 23:24:33,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12756 to 12686. [2021-11-20 23:24:33,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12686 states, 7483 states have (on average 1.2289188828010156) internal successors, (9196), 7679 states have internal predecessors, (9196), 4019 states have call successors, (4019), 1187 states have call predecessors, (4019), 1181 states have return successors, (4117), 3931 states have call predecessors, (4117), 4016 states have call successors, (4117) [2021-11-20 23:24:33,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12686 states to 12686 states and 17332 transitions. [2021-11-20 23:24:33,139 INFO L78 Accepts]: Start accepts. Automaton has 12686 states and 17332 transitions. Word has length 235 [2021-11-20 23:24:33,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:24:33,139 INFO L470 AbstractCegarLoop]: Abstraction has 12686 states and 17332 transitions. [2021-11-20 23:24:33,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-20 23:24:33,139 INFO L276 IsEmpty]: Start isEmpty. Operand 12686 states and 17332 transitions. [2021-11-20 23:24:33,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-11-20 23:24:33,143 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:24:33,144 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 12, 11, 11, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:24:33,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 23:24:33,144 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:24:33,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:24:33,145 INFO L85 PathProgramCache]: Analyzing trace with hash -389761654, now seen corresponding path program 1 times [2021-11-20 23:24:33,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:24:33,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054541267] [2021-11-20 23:24:33,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:24:33,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:24:33,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:24:33,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 1009 trivial. 0 not checked. [2021-11-20 23:24:33,820 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:24:33,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054541267] [2021-11-20 23:24:33,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054541267] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:24:33,820 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:24:33,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:24:33,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881747422] [2021-11-20 23:24:33,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:24:33,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:24:33,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:24:33,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:24:33,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:24:33,822 INFO L87 Difference]: Start difference. First operand 12686 states and 17332 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-20 23:24:35,964 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:24:43,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:24:43,931 INFO L93 Difference]: Finished difference Result 13452 states and 18144 transitions. [2021-11-20 23:24:43,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:24:43,931 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 249 [2021-11-20 23:24:43,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:24:43,988 INFO L225 Difference]: With dead ends: 13452 [2021-11-20 23:24:43,989 INFO L226 Difference]: Without dead ends: 13329 [2021-11-20 23:24:43,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:24:43,997 INFO L933 BasicCegarLoop]: 1929 mSDtfsCounter, 2019 mSDsluCounter, 4709 mSDsCounter, 0 mSdLazyCounter, 1050 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2019 SdHoareTripleChecker+Valid, 5938 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1050 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:24:43,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2019 Valid, 5938 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1050 Invalid, 1 Unknown, 0 Unchecked, 9.4s Time] [2021-11-20 23:24:44,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13329 states. [2021-11-20 23:24:44,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13329 to 13325. [2021-11-20 23:24:44,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13325 states, 7860 states have (on average 1.2225190839694657) internal successors, (9609), 8032 states have internal predecessors, (9609), 4119 states have call successors, (4119), 1348 states have call predecessors, (4119), 1344 states have return successors, (4220), 4056 states have call predecessors, (4220), 4119 states have call successors, (4220) [2021-11-20 23:24:44,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13325 states to 13325 states and 17948 transitions. [2021-11-20 23:24:44,834 INFO L78 Accepts]: Start accepts. Automaton has 13325 states and 17948 transitions. Word has length 249 [2021-11-20 23:24:44,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:24:44,834 INFO L470 AbstractCegarLoop]: Abstraction has 13325 states and 17948 transitions. [2021-11-20 23:24:44,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-20 23:24:44,835 INFO L276 IsEmpty]: Start isEmpty. Operand 13325 states and 17948 transitions. [2021-11-20 23:24:44,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2021-11-20 23:24:44,842 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:24:44,843 INFO L514 BasicCegarLoop]: trace histogram [20, 13, 13, 13, 13, 13, 13, 7, 7, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:24:44,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 23:24:44,843 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:24:44,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:24:44,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1189550655, now seen corresponding path program 1 times [2021-11-20 23:24:44,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:24:44,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911487843] [2021-11-20 23:24:44,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:24:44,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:24:45,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:24:45,394 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 929 trivial. 0 not checked. [2021-11-20 23:24:45,394 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:24:45,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911487843] [2021-11-20 23:24:45,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911487843] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:24:45,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:24:45,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:24:45,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134289095] [2021-11-20 23:24:45,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:24:45,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:24:45,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:24:45,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:24:45,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:24:45,397 INFO L87 Difference]: Start difference. First operand 13325 states and 17948 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) [2021-11-20 23:24:47,541 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:24:54,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:24:54,756 INFO L93 Difference]: Finished difference Result 31010 states and 41873 transitions. [2021-11-20 23:24:54,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:24:54,757 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) Word has length 277 [2021-11-20 23:24:54,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:24:54,802 INFO L225 Difference]: With dead ends: 31010 [2021-11-20 23:24:54,803 INFO L226 Difference]: Without dead ends: 17863 [2021-11-20 23:24:54,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:24:54,831 INFO L933 BasicCegarLoop]: 3183 mSDtfsCounter, 1659 mSDsluCounter, 2016 mSDsCounter, 0 mSdLazyCounter, 943 mSolverCounterSat, 28 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1659 SdHoareTripleChecker+Valid, 4920 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 943 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:24:54,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1659 Valid, 4920 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 943 Invalid, 1 Unknown, 0 Unchecked, 8.4s Time] [2021-11-20 23:24:54,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17863 states. [2021-11-20 23:24:55,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17863 to 17855. [2021-11-20 23:24:55,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17855 states, 10564 states have (on average 1.21932979931844) internal successors, (12881), 10797 states have internal predecessors, (12881), 5496 states have call successors, (5496), 1798 states have call predecessors, (5496), 1793 states have return successors, (5598), 5414 states have call predecessors, (5598), 5496 states have call successors, (5598) [2021-11-20 23:24:55,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17855 states to 17855 states and 23975 transitions. [2021-11-20 23:24:55,655 INFO L78 Accepts]: Start accepts. Automaton has 17855 states and 23975 transitions. Word has length 277 [2021-11-20 23:24:55,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:24:55,657 INFO L470 AbstractCegarLoop]: Abstraction has 17855 states and 23975 transitions. [2021-11-20 23:24:55,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) [2021-11-20 23:24:55,657 INFO L276 IsEmpty]: Start isEmpty. Operand 17855 states and 23975 transitions. [2021-11-20 23:24:55,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2021-11-20 23:24:55,666 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:24:55,666 INFO L514 BasicCegarLoop]: trace histogram [21, 13, 13, 13, 13, 13, 13, 9, 9, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:24:55,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-20 23:24:55,667 INFO L402 AbstractCegarLoop]: === Iteration 19 === 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)] === [2021-11-20 23:24:55,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:24:55,667 INFO L85 PathProgramCache]: Analyzing trace with hash -15079952, now seen corresponding path program 1 times [2021-11-20 23:24:55,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:24:55,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394248572] [2021-11-20 23:24:55,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:24:55,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:24:55,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:24:56,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1033 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1033 trivial. 0 not checked. [2021-11-20 23:24:56,778 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:24:56,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394248572] [2021-11-20 23:24:56,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394248572] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:24:56,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:24:56,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:24:56,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142225089] [2021-11-20 23:24:56,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:24:56,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:24:56,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:24:56,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:24:56,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:24:56,781 INFO L87 Difference]: Start difference. First operand 17855 states and 23975 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 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) [2021-11-20 23:24:58,903 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:25:06,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:25:06,281 INFO L93 Difference]: Finished difference Result 17907 states and 24025 transitions. [2021-11-20 23:25:06,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:25:06,288 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 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 321 [2021-11-20 23:25:06,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:25:06,329 INFO L225 Difference]: With dead ends: 17907 [2021-11-20 23:25:06,329 INFO L226 Difference]: Without dead ends: 17905 [2021-11-20 23:25:06,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:25:06,335 INFO L933 BasicCegarLoop]: 1813 mSDtfsCounter, 1986 mSDsluCounter, 4285 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1989 SdHoareTripleChecker+Valid, 5466 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2021-11-20 23:25:06,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1989 Valid, 5466 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 956 Invalid, 1 Unknown, 0 Unchecked, 8.6s Time] [2021-11-20 23:25:06,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17905 states. [2021-11-20 23:25:07,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17905 to 17903. [2021-11-20 23:25:07,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17903 states, 10600 states have (on average 1.2178301886792453) internal successors, (12909), 10833 states have internal predecessors, (12909), 5496 states have call successors, (5496), 1810 states have call predecessors, (5496), 1805 states have return successors, (5598), 5414 states have call predecessors, (5598), 5496 states have call successors, (5598) [2021-11-20 23:25:07,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17903 states to 17903 states and 24003 transitions. [2021-11-20 23:25:07,224 INFO L78 Accepts]: Start accepts. Automaton has 17903 states and 24003 transitions. Word has length 321 [2021-11-20 23:25:07,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:25:07,225 INFO L470 AbstractCegarLoop]: Abstraction has 17903 states and 24003 transitions. [2021-11-20 23:25:07,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 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) [2021-11-20 23:25:07,225 INFO L276 IsEmpty]: Start isEmpty. Operand 17903 states and 24003 transitions. [2021-11-20 23:25:07,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-11-20 23:25:07,236 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:25:07,237 INFO L514 BasicCegarLoop]: trace histogram [22, 13, 13, 13, 13, 13, 13, 7, 7, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:25:07,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-20 23:25:07,237 INFO L402 AbstractCegarLoop]: === Iteration 20 === 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)] === [2021-11-20 23:25:07,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:25:07,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1406325827, now seen corresponding path program 1 times [2021-11-20 23:25:07,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:25:07,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289997401] [2021-11-20 23:25:07,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:25:07,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:25:07,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:25:07,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 1029 trivial. 0 not checked. [2021-11-20 23:25:07,872 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:25:07,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289997401] [2021-11-20 23:25:07,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289997401] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:25:07,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:25:07,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:25:07,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694287874] [2021-11-20 23:25:07,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:25:07,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:25:07,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:25:07,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:25:07,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:25:07,875 INFO L87 Difference]: Start difference. First operand 17903 states and 24003 transitions. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 4 states have internal predecessors, (124), 3 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-20 23:25:09,995 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:25:25,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:25:25,313 INFO L93 Difference]: Finished difference Result 39998 states and 53643 transitions. [2021-11-20 23:25:25,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:25:25,314 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 4 states have internal predecessors, (124), 3 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) Word has length 326 [2021-11-20 23:25:25,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:25:25,407 INFO L225 Difference]: With dead ends: 39998 [2021-11-20 23:25:25,407 INFO L226 Difference]: Without dead ends: 22273 [2021-11-20 23:25:25,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:25:25,464 INFO L933 BasicCegarLoop]: 3182 mSDtfsCounter, 1621 mSDsluCounter, 9478 mSDsCounter, 0 mSdLazyCounter, 2024 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1621 SdHoareTripleChecker+Valid, 11285 SdHoareTripleChecker+Invalid, 2026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2024 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:25:25,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1621 Valid, 11285 Invalid, 2026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2024 Invalid, 1 Unknown, 0 Unchecked, 16.1s Time] [2021-11-20 23:25:25,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22273 states. [2021-11-20 23:25:27,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22273 to 22253. [2021-11-20 23:25:27,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22253 states, 13127 states have (on average 1.2177192046926182) internal successors, (15985), 13421 states have internal predecessors, (15985), 6867 states have call successors, (6867), 2257 states have call predecessors, (6867), 2257 states have return successors, (6976), 6772 states have call predecessors, (6976), 6867 states have call successors, (6976) [2021-11-20 23:25:27,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22253 states to 22253 states and 29828 transitions. [2021-11-20 23:25:27,173 INFO L78 Accepts]: Start accepts. Automaton has 22253 states and 29828 transitions. Word has length 326 [2021-11-20 23:25:27,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:25:27,174 INFO L470 AbstractCegarLoop]: Abstraction has 22253 states and 29828 transitions. [2021-11-20 23:25:27,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 4 states have internal predecessors, (124), 3 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-20 23:25:27,174 INFO L276 IsEmpty]: Start isEmpty. Operand 22253 states and 29828 transitions. [2021-11-20 23:25:27,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-11-20 23:25:27,187 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:25:27,188 INFO L514 BasicCegarLoop]: trace histogram [22, 13, 13, 13, 13, 13, 13, 7, 7, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:25:27,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-20 23:25:27,188 INFO L402 AbstractCegarLoop]: === Iteration 21 === 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)] === [2021-11-20 23:25:27,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:25:27,189 INFO L85 PathProgramCache]: Analyzing trace with hash -803273408, now seen corresponding path program 1 times [2021-11-20 23:25:27,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:25:27,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107677778] [2021-11-20 23:25:27,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:25:27,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:25:27,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:25:27,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 1029 trivial. 0 not checked. [2021-11-20 23:25:27,791 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:25:27,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107677778] [2021-11-20 23:25:27,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107677778] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:25:27,792 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:25:27,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:25:27,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889492456] [2021-11-20 23:25:27,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:25:27,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:25:27,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:25:27,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:25:27,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:25:27,795 INFO L87 Difference]: Start difference. First operand 22253 states and 29828 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, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-20 23:25:29,889 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:25:38,083 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:25:41,235 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:25:46,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:25:46,363 INFO L93 Difference]: Finished difference Result 50908 states and 68333 transitions. [2021-11-20 23:25:46,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:25:46,364 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, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) Word has length 327 [2021-11-20 23:25:46,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:25:46,458 INFO L225 Difference]: With dead ends: 50908 [2021-11-20 23:25:46,458 INFO L226 Difference]: Without dead ends: 28833 [2021-11-20 23:25:46,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:25:46,517 INFO L933 BasicCegarLoop]: 3061 mSDtfsCounter, 1749 mSDsluCounter, 9162 mSDsCounter, 0 mSdLazyCounter, 1990 mSolverCounterSat, 22 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1749 SdHoareTripleChecker+Valid, 10914 SdHoareTripleChecker+Invalid, 2014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1990 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.8s IncrementalHoareTripleChecker+Time [2021-11-20 23:25:46,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1749 Valid, 10914 Invalid, 2014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1990 Invalid, 2 Unknown, 0 Unchecked, 16.8s Time] [2021-11-20 23:25:46,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28833 states. [2021-11-20 23:25:48,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28833 to 28813. [2021-11-20 23:25:48,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28813 states, 16909 states have (on average 1.2126086699390857) internal successors, (20504), 17293 states have internal predecessors, (20504), 8972 states have call successors, (8972), 2927 states have call predecessors, (8972), 2930 states have return successors, (9091), 8847 states have call predecessors, (9091), 8972 states have call successors, (9091) [2021-11-20 23:25:48,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28813 states to 28813 states and 38567 transitions. [2021-11-20 23:25:48,144 INFO L78 Accepts]: Start accepts. Automaton has 28813 states and 38567 transitions. Word has length 327 [2021-11-20 23:25:48,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:25:48,145 INFO L470 AbstractCegarLoop]: Abstraction has 28813 states and 38567 transitions. [2021-11-20 23:25:48,145 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, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-20 23:25:48,146 INFO L276 IsEmpty]: Start isEmpty. Operand 28813 states and 38567 transitions. [2021-11-20 23:25:48,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2021-11-20 23:25:48,159 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:25:48,160 INFO L514 BasicCegarLoop]: trace histogram [22, 13, 13, 13, 13, 13, 13, 7, 7, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:25:48,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-20 23:25:48,160 INFO L402 AbstractCegarLoop]: === Iteration 22 === 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)] === [2021-11-20 23:25:48,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:25:48,161 INFO L85 PathProgramCache]: Analyzing trace with hash 284382348, now seen corresponding path program 1 times [2021-11-20 23:25:48,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:25:48,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086370456] [2021-11-20 23:25:48,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:25:48,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:25:48,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:25:48,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 1029 trivial. 0 not checked. [2021-11-20 23:25:48,785 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:25:48,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086370456] [2021-11-20 23:25:48,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086370456] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:25:48,786 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:25:48,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:25:48,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700685960] [2021-11-20 23:25:48,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:25:48,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:25:48,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:25:48,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:25:48,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:25:48,788 INFO L87 Difference]: Start difference. First operand 28813 states and 38567 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, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-20 23:25:50,884 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:26:00,804 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:26:08,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:26:08,127 INFO L93 Difference]: Finished difference Result 64046 states and 85847 transitions. [2021-11-20 23:26:08,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:26:08,127 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 4 states have internal predecessors, (126), 3 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) Word has length 328 [2021-11-20 23:26:08,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:26:08,259 INFO L225 Difference]: With dead ends: 64046 [2021-11-20 23:26:08,259 INFO L226 Difference]: Without dead ends: 35411 [2021-11-20 23:26:08,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:26:08,329 INFO L933 BasicCegarLoop]: 3277 mSDtfsCounter, 1743 mSDsluCounter, 9677 mSDsCounter, 0 mSdLazyCounter, 2113 mSolverCounterSat, 25 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1743 SdHoareTripleChecker+Valid, 11568 SdHoareTripleChecker+Invalid, 2140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 2113 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:26:08,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1743 Valid, 11568 Invalid, 2140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 2113 Invalid, 2 Unknown, 0 Unchecked, 17.3s Time] [2021-11-20 23:26:08,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35411 states. [2021-11-20 23:26:10,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35411 to 35391. [2021-11-20 23:26:10,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35391 states, 20709 states have (on average 1.209184412574243) internal successors, (25041), 21183 states have internal predecessors, (25041), 11077 states have call successors, (11077), 3597 states have call predecessors, (11077), 3603 states have return successors, (11206), 10922 states have call predecessors, (11206), 11077 states have call successors, (11206) [2021-11-20 23:26:10,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35391 states to 35391 states and 47324 transitions. [2021-11-20 23:26:10,682 INFO L78 Accepts]: Start accepts. Automaton has 35391 states and 47324 transitions. Word has length 328 [2021-11-20 23:26:10,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:26:10,682 INFO L470 AbstractCegarLoop]: Abstraction has 35391 states and 47324 transitions. [2021-11-20 23:26:10,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 4 states have internal predecessors, (126), 3 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-20 23:26:10,683 INFO L276 IsEmpty]: Start isEmpty. Operand 35391 states and 47324 transitions. [2021-11-20 23:26:10,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2021-11-20 23:26:10,691 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:26:10,692 INFO L514 BasicCegarLoop]: trace histogram [22, 13, 13, 13, 13, 13, 13, 7, 7, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:26:10,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-20 23:26:10,692 INFO L402 AbstractCegarLoop]: === Iteration 23 === 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)] === [2021-11-20 23:26:10,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:26:10,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1213092680, now seen corresponding path program 1 times [2021-11-20 23:26:10,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:26:10,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283813390] [2021-11-20 23:26:10,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:26:10,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:26:10,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:26:11,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 1029 trivial. 0 not checked. [2021-11-20 23:26:11,311 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:26:11,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283813390] [2021-11-20 23:26:11,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283813390] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:26:11,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:26:11,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:26:11,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337818751] [2021-11-20 23:26:11,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:26:11,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:26:11,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:26:11,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:26:11,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:26:11,313 INFO L87 Difference]: Start difference. First operand 35391 states and 47324 transitions. Second operand has 5 states, 5 states have (on average 25.4) internal successors, (127), 4 states have internal predecessors, (127), 3 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-20 23:26:13,411 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:26:25,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:26:25,065 INFO L93 Difference]: Finished difference Result 75040 states and 100359 transitions. [2021-11-20 23:26:25,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:26:25,065 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 4 states have internal predecessors, (127), 3 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) Word has length 329 [2021-11-20 23:26:25,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:26:25,202 INFO L225 Difference]: With dead ends: 75040 [2021-11-20 23:26:25,202 INFO L226 Difference]: Without dead ends: 39827 [2021-11-20 23:26:25,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:26:25,279 INFO L933 BasicCegarLoop]: 2308 mSDtfsCounter, 1894 mSDsluCounter, 7056 mSDsCounter, 0 mSdLazyCounter, 1401 mSolverCounterSat, 30 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1898 SdHoareTripleChecker+Valid, 8469 SdHoareTripleChecker+Invalid, 1432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1401 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:26:25,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1898 Valid, 8469 Invalid, 1432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1401 Invalid, 1 Unknown, 0 Unchecked, 11.1s Time] [2021-11-20 23:26:25,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39827 states. [2021-11-20 23:26:27,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39827 to 39819. [2021-11-20 23:26:27,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39819 states, 23278 states have (on average 1.2104562247615775) internal successors, (28177), 23817 states have internal predecessors, (28177), 12470 states have call successors, (12470), 4064 states have call predecessors, (12470), 4069 states have return successors, (12600), 12294 states have call predecessors, (12600), 12470 states have call successors, (12600) [2021-11-20 23:26:27,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39819 states to 39819 states and 53247 transitions. [2021-11-20 23:26:27,623 INFO L78 Accepts]: Start accepts. Automaton has 39819 states and 53247 transitions. Word has length 329 [2021-11-20 23:26:27,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:26:27,623 INFO L470 AbstractCegarLoop]: Abstraction has 39819 states and 53247 transitions. [2021-11-20 23:26:27,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 4 states have internal predecessors, (127), 3 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-20 23:26:27,624 INFO L276 IsEmpty]: Start isEmpty. Operand 39819 states and 53247 transitions. [2021-11-20 23:26:27,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2021-11-20 23:26:27,634 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:26:27,634 INFO L514 BasicCegarLoop]: trace histogram [21, 13, 13, 13, 13, 13, 13, 10, 10, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:26:27,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-20 23:26:27,635 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)] === [2021-11-20 23:26:27,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:26:27,635 INFO L85 PathProgramCache]: Analyzing trace with hash -745488665, now seen corresponding path program 1 times [2021-11-20 23:26:27,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:26:27,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010797555] [2021-11-20 23:26:27,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:26:27,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:26:27,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:26:28,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1062 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1062 trivial. 0 not checked. [2021-11-20 23:26:28,578 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:26:28,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010797555] [2021-11-20 23:26:28,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010797555] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:26:28,579 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:26:28,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 23:26:28,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316940669] [2021-11-20 23:26:28,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:26:28,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 23:26:28,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:26:28,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 23:26:28,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:26:28,581 INFO L87 Difference]: Start difference. First operand 39819 states and 53247 transitions. Second operand has 8 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 3 states have call successors, (56), 2 states have call predecessors, (56), 3 states have return successors, (52), 4 states have call predecessors, (52), 2 states have call successors, (52) [2021-11-20 23:26:30,672 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:26:41,125 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:26:44,214 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:26:50,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:26:50,495 INFO L93 Difference]: Finished difference Result 79900 states and 107171 transitions. [2021-11-20 23:26:50,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 23:26:50,496 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 3 states have call successors, (56), 2 states have call predecessors, (56), 3 states have return successors, (52), 4 states have call predecessors, (52), 2 states have call successors, (52) Word has length 352 [2021-11-20 23:26:50,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:26:50,779 INFO L225 Difference]: With dead ends: 79900 [2021-11-20 23:26:50,780 INFO L226 Difference]: Without dead ends: 40259 [2021-11-20 23:26:50,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-20 23:26:50,872 INFO L933 BasicCegarLoop]: 1774 mSDtfsCounter, 9 mSDsluCounter, 12465 mSDsCounter, 0 mSdLazyCounter, 2398 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 12368 SdHoareTripleChecker+Invalid, 2408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2398 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:26:50,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 12368 Invalid, 2408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2398 Invalid, 1 Unknown, 0 Unchecked, 18.7s Time] [2021-11-20 23:26:50,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40259 states. [2021-11-20 23:26:53,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40259 to 39984. [2021-11-20 23:26:53,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39984 states, 23388 states have (on average 1.2094663930220626) internal successors, (28287), 23872 states have internal predecessors, (28287), 12525 states have call successors, (12525), 4064 states have call predecessors, (12525), 4069 states have return successors, (12655), 12349 states have call predecessors, (12655), 12525 states have call successors, (12655) [2021-11-20 23:26:53,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39984 states to 39984 states and 53467 transitions. [2021-11-20 23:26:53,345 INFO L78 Accepts]: Start accepts. Automaton has 39984 states and 53467 transitions. Word has length 352 [2021-11-20 23:26:53,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:26:53,346 INFO L470 AbstractCegarLoop]: Abstraction has 39984 states and 53467 transitions. [2021-11-20 23:26:53,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 3 states have call successors, (56), 2 states have call predecessors, (56), 3 states have return successors, (52), 4 states have call predecessors, (52), 2 states have call successors, (52) [2021-11-20 23:26:53,346 INFO L276 IsEmpty]: Start isEmpty. Operand 39984 states and 53467 transitions. [2021-11-20 23:26:53,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2021-11-20 23:26:53,360 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:26:53,360 INFO L514 BasicCegarLoop]: trace histogram [21, 13, 13, 13, 13, 13, 13, 10, 10, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:26:53,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-20 23:26:53,361 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)] === [2021-11-20 23:26:53,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:26:53,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1991533166, now seen corresponding path program 1 times [2021-11-20 23:26:53,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:26:53,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287361689] [2021-11-20 23:26:53,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:26:53,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:26:53,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:26:54,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1062 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1062 trivial. 0 not checked. [2021-11-20 23:26:54,256 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:26:54,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287361689] [2021-11-20 23:26:54,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287361689] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:26:54,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:26:54,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:26:54,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140951054] [2021-11-20 23:26:54,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:26:54,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:26:54,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:26:54,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:26:54,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:26:54,259 INFO L87 Difference]: Start difference. First operand 39984 states and 53467 transitions. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (57), 3 states have call predecessors, (57), 2 states have return successors, (53), 2 states have call predecessors, (53), 2 states have call successors, (53) [2021-11-20 23:26:56,373 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:27:06,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:27:06,678 INFO L93 Difference]: Finished difference Result 39986 states and 53468 transitions. [2021-11-20 23:27:06,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:27:06,684 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (57), 3 states have call predecessors, (57), 2 states have return successors, (53), 2 states have call predecessors, (53), 2 states have call successors, (53) Word has length 355 [2021-11-20 23:27:06,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:27:06,812 INFO L225 Difference]: With dead ends: 39986 [2021-11-20 23:27:06,812 INFO L226 Difference]: Without dead ends: 39984 [2021-11-20 23:27:06,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:27:06,828 INFO L933 BasicCegarLoop]: 1794 mSDtfsCounter, 40 mSDsluCounter, 6302 mSDsCounter, 0 mSdLazyCounter, 1268 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 7155 SdHoareTripleChecker+Invalid, 1270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1268 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:27:06,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 7155 Invalid, 1270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1268 Invalid, 1 Unknown, 0 Unchecked, 10.4s Time] [2021-11-20 23:27:06,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39984 states. [2021-11-20 23:27:09,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39984 to 39984. [2021-11-20 23:27:09,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39984 states, 23388 states have (on average 1.2077561142466222) internal successors, (28247), 23872 states have internal predecessors, (28247), 12525 states have call successors, (12525), 4064 states have call predecessors, (12525), 4069 states have return successors, (12655), 12349 states have call predecessors, (12655), 12525 states have call successors, (12655) [2021-11-20 23:27:09,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39984 states to 39984 states and 53427 transitions. [2021-11-20 23:27:09,537 INFO L78 Accepts]: Start accepts. Automaton has 39984 states and 53427 transitions. Word has length 355 [2021-11-20 23:27:09,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:27:09,537 INFO L470 AbstractCegarLoop]: Abstraction has 39984 states and 53427 transitions. [2021-11-20 23:27:09,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (57), 3 states have call predecessors, (57), 2 states have return successors, (53), 2 states have call predecessors, (53), 2 states have call successors, (53) [2021-11-20 23:27:09,538 INFO L276 IsEmpty]: Start isEmpty. Operand 39984 states and 53427 transitions. [2021-11-20 23:27:09,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2021-11-20 23:27:09,557 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:27:09,557 INFO L514 BasicCegarLoop]: trace histogram [24, 13, 13, 13, 13, 13, 13, 7, 7, 6, 6, 6, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:27:09,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-20 23:27:09,558 INFO L402 AbstractCegarLoop]: === Iteration 26 === 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)] === [2021-11-20 23:27:09,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:27:09,558 INFO L85 PathProgramCache]: Analyzing trace with hash 632677667, now seen corresponding path program 1 times [2021-11-20 23:27:09,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:27:09,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678565441] [2021-11-20 23:27:09,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:27:09,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:27:09,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:27:10,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 66 proven. 2 refuted. 0 times theorem prover too weak. 1123 trivial. 0 not checked. [2021-11-20 23:27:10,086 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:27:10,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678565441] [2021-11-20 23:27:10,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678565441] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:27:10,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401060839] [2021-11-20 23:27:10,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:27:10,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:27:10,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47f5bc8-4500-45a7-b08e-83d18ac9165d/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:27:10,090 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47f5bc8-4500-45a7-b08e-83d18ac9165d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:27:10,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47f5bc8-4500-45a7-b08e-83d18ac9165d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 23:27:11,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:27:11,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 3453 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 23:27:11,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:27:12,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 202 proven. 0 refuted. 0 times theorem prover too weak. 989 trivial. 0 not checked. [2021-11-20 23:27:12,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:27:12,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401060839] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:27:12,503 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:27:12,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-11-20 23:27:12,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824230578] [2021-11-20 23:27:12,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:27:12,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:27:12,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:27:12,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:27:12,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:27:12,507 INFO L87 Difference]: Start difference. First operand 39984 states and 53427 transitions. Second operand has 5 states, 5 states have (on average 28.8) internal successors, (144), 4 states have internal predecessors, (144), 3 states have call successors, (41), 3 states have call predecessors, (41), 4 states have return successors, (39), 4 states have call predecessors, (39), 3 states have call successors, (39) [2021-11-20 23:27:14,601 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:27:24,236 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:27:28,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:27:28,728 INFO L93 Difference]: Finished difference Result 86415 states and 115609 transitions. [2021-11-20 23:27:28,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:27:28,729 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 4 states have internal predecessors, (144), 3 states have call successors, (41), 3 states have call predecessors, (41), 4 states have return successors, (39), 4 states have call predecessors, (39), 3 states have call successors, (39) Word has length 352 [2021-11-20 23:27:28,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:27:28,896 INFO L225 Difference]: With dead ends: 86415 [2021-11-20 23:27:28,896 INFO L226 Difference]: Without dead ends: 46609 [2021-11-20 23:27:29,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-20 23:27:29,005 INFO L933 BasicCegarLoop]: 2657 mSDtfsCounter, 1761 mSDsluCounter, 8111 mSDsCounter, 0 mSdLazyCounter, 1637 mSolverCounterSat, 31 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1761 SdHoareTripleChecker+Valid, 9705 SdHoareTripleChecker+Invalid, 1669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1637 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:27:29,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1761 Valid, 9705 Invalid, 1669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1637 Invalid, 1 Unknown, 0 Unchecked, 13.2s Time] [2021-11-20 23:27:29,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46609 states. [2021-11-20 23:27:31,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46609 to 46589. [2021-11-20 23:27:31,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46589 states, 27212 states have (on average 1.205865059532559) internal successors, (32814), 27777 states have internal predecessors, (32814), 14639 states have call successors, (14639), 4734 states have call predecessors, (14639), 4736 states have return successors, (14773), 14427 states have call predecessors, (14773), 14639 states have call successors, (14773) [2021-11-20 23:27:31,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46589 states to 46589 states and 62226 transitions. [2021-11-20 23:27:31,681 INFO L78 Accepts]: Start accepts. Automaton has 46589 states and 62226 transitions. Word has length 352 [2021-11-20 23:27:31,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:27:31,682 INFO L470 AbstractCegarLoop]: Abstraction has 46589 states and 62226 transitions. [2021-11-20 23:27:31,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 4 states have internal predecessors, (144), 3 states have call successors, (41), 3 states have call predecessors, (41), 4 states have return successors, (39), 4 states have call predecessors, (39), 3 states have call successors, (39) [2021-11-20 23:27:31,683 INFO L276 IsEmpty]: Start isEmpty. Operand 46589 states and 62226 transitions. [2021-11-20 23:27:31,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2021-11-20 23:27:31,702 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:27:31,702 INFO L514 BasicCegarLoop]: trace histogram [24, 13, 13, 13, 13, 13, 13, 7, 7, 6, 6, 6, 5, 5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:27:31,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47f5bc8-4500-45a7-b08e-83d18ac9165d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 23:27:31,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47f5bc8-4500-45a7-b08e-83d18ac9165d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-20 23:27:31,929 INFO L402 AbstractCegarLoop]: === Iteration 27 === 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)] === [2021-11-20 23:27:31,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:27:31,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1449905850, now seen corresponding path program 1 times [2021-11-20 23:27:31,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:27:31,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188954520] [2021-11-20 23:27:31,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:27:31,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:27:32,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:27:32,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1206 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 1166 trivial. 0 not checked. [2021-11-20 23:27:32,683 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:27:32,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188954520] [2021-11-20 23:27:32,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188954520] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:27:32,684 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:27:32,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:27:32,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620860885] [2021-11-20 23:27:32,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:27:32,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:27:32,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:27:32,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:27:32,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:27:32,686 INFO L87 Difference]: Start difference. First operand 46589 states and 62226 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 3 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-20 23:27:34,804 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:27:44,614 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:27:50,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:27:50,914 INFO L93 Difference]: Finished difference Result 110063 states and 149626 transitions. [2021-11-20 23:27:50,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:27:50,915 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 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 368 [2021-11-20 23:27:50,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:27:51,284 INFO L225 Difference]: With dead ends: 110063 [2021-11-20 23:27:51,284 INFO L226 Difference]: Without dead ends: 63652 [2021-11-20 23:27:51,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:27:51,374 INFO L933 BasicCegarLoop]: 3299 mSDtfsCounter, 1959 mSDsluCounter, 5715 mSDsCounter, 0 mSdLazyCounter, 1688 mSolverCounterSat, 303 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2132 SdHoareTripleChecker+Valid, 8246 SdHoareTripleChecker+Invalid, 1993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 1688 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:27:51,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2132 Valid, 8246 Invalid, 1993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 1688 Invalid, 2 Unknown, 0 Unchecked, 14.5s Time] [2021-11-20 23:27:51,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63652 states.