./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-natsemi-natsemi.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baed38c0-6ccd-47e3-86f2-7d1189c3415c/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baed38c0-6ccd-47e3-86f2-7d1189c3415c/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baed38c0-6ccd-47e3-86f2-7d1189c3415c/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baed38c0-6ccd-47e3-86f2-7d1189c3415c/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-natsemi-natsemi.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baed38c0-6ccd-47e3-86f2-7d1189c3415c/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baed38c0-6ccd-47e3-86f2-7d1189c3415c/bin/utaipan-EQgc7hIp5V --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 6081258d9228cc20a54c5db1ec40347e5dbacbb2bb40755a07881673d13b875b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:11:22,611 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:11:22,613 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:11:22,653 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:11:22,654 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:11:22,655 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:11:22,658 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:11:22,660 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:11:22,663 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:11:22,664 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:11:22,666 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:11:22,668 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:11:22,668 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:11:22,670 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:11:22,672 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:11:22,674 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:11:22,675 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:11:22,677 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:11:22,680 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:11:22,683 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:11:22,686 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:11:22,688 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:11:22,690 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:11:22,691 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:11:22,696 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:11:22,697 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:11:22,697 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:11:22,699 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:11:22,700 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:11:22,701 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:11:22,702 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:11:22,703 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:11:22,704 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:11:22,706 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:11:22,712 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:11:22,714 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:11:22,716 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:11:22,716 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:11:22,716 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:11:22,718 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:11:22,719 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:11:22,720 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baed38c0-6ccd-47e3-86f2-7d1189c3415c/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 02:11:22,778 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:11:22,785 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:11:22,786 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:11:22,786 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:11:22,794 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:11:22,795 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:11:22,796 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:11:22,796 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:11:22,796 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:11:22,796 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:11:22,798 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:11:22,798 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:11:22,798 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:11:22,799 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:11:22,799 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:11:22,799 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:11:22,800 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:11:22,800 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:11:22,801 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:11:22,801 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:11:22,801 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:11:22,802 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:11:22,802 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:11:22,802 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:11:22,802 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:11:22,803 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:11:22,804 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:11:22,805 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:11:22,805 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:11:22,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:11:22,806 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:11:22,806 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:11:22,807 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:11:22,807 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:11:22,807 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:11:22,807 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:11:22,808 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:11:22,808 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:11:22,808 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_baed38c0-6ccd-47e3-86f2-7d1189c3415c/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baed38c0-6ccd-47e3-86f2-7d1189c3415c/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6081258d9228cc20a54c5db1ec40347e5dbacbb2bb40755a07881673d13b875b [2021-11-23 02:11:23,101 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:11:23,124 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:11:23,127 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:11:23,128 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:11:23,129 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:11:23,131 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baed38c0-6ccd-47e3-86f2-7d1189c3415c/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-natsemi-natsemi.cil.i [2021-11-23 02:11:23,202 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baed38c0-6ccd-47e3-86f2-7d1189c3415c/bin/utaipan-EQgc7hIp5V/data/6ef4c9408/c95304c485a0469c8bbc1e009dde6bba/FLAGf0593c83b [2021-11-23 02:11:24,190 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:11:24,190 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baed38c0-6ccd-47e3-86f2-7d1189c3415c/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-natsemi-natsemi.cil.i [2021-11-23 02:11:24,237 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baed38c0-6ccd-47e3-86f2-7d1189c3415c/bin/utaipan-EQgc7hIp5V/data/6ef4c9408/c95304c485a0469c8bbc1e009dde6bba/FLAGf0593c83b [2021-11-23 02:11:24,563 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baed38c0-6ccd-47e3-86f2-7d1189c3415c/bin/utaipan-EQgc7hIp5V/data/6ef4c9408/c95304c485a0469c8bbc1e009dde6bba [2021-11-23 02:11:24,566 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:11:24,567 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:11:24,569 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:11:24,572 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:11:24,576 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:11:24,578 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:11:24" (1/1) ... [2021-11-23 02:11:24,580 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66480edc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:24, skipping insertion in model container [2021-11-23 02:11:24,581 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:11:24" (1/1) ... [2021-11-23 02:11:24,590 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:11:24,782 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:11:28,914 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_baed38c0-6ccd-47e3-86f2-7d1189c3415c/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-natsemi-natsemi.cil.i[386207,386220] [2021-11-23 02:11:28,918 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_baed38c0-6ccd-47e3-86f2-7d1189c3415c/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-natsemi-natsemi.cil.i[386376,386389] [2021-11-23 02:11:28,924 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_baed38c0-6ccd-47e3-86f2-7d1189c3415c/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-natsemi-natsemi.cil.i[386543,386556] [2021-11-23 02:11:28,925 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_baed38c0-6ccd-47e3-86f2-7d1189c3415c/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-natsemi-natsemi.cil.i[386711,386724] [2021-11-23 02:11:28,955 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:11:29,040 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:11:29,560 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_baed38c0-6ccd-47e3-86f2-7d1189c3415c/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-natsemi-natsemi.cil.i[386207,386220] [2021-11-23 02:11:29,560 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_baed38c0-6ccd-47e3-86f2-7d1189c3415c/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-natsemi-natsemi.cil.i[386376,386389] [2021-11-23 02:11:29,561 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_baed38c0-6ccd-47e3-86f2-7d1189c3415c/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-natsemi-natsemi.cil.i[386543,386556] [2021-11-23 02:11:29,561 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_baed38c0-6ccd-47e3-86f2-7d1189c3415c/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-natsemi-natsemi.cil.i[386711,386724] [2021-11-23 02:11:29,571 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:11:29,904 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:11:29,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:29 WrapperNode [2021-11-23 02:11:29,905 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:11:29,906 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:11:29,906 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:11:29,919 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:11:29,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:29" (1/1) ... [2021-11-23 02:11:30,107 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:29" (1/1) ... [2021-11-23 02:11:30,426 INFO L137 Inliner]: procedures = 512, calls = 2538, calls flagged for inlining = 248, calls inlined = 216, statements flattened = 5394 [2021-11-23 02:11:30,428 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:11:30,429 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:11:30,429 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:11:30,430 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:11:30,440 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:29" (1/1) ... [2021-11-23 02:11:30,441 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:29" (1/1) ... [2021-11-23 02:11:30,509 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:29" (1/1) ... [2021-11-23 02:11:30,510 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:29" (1/1) ... [2021-11-23 02:11:30,720 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:29" (1/1) ... [2021-11-23 02:11:30,753 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:29" (1/1) ... [2021-11-23 02:11:30,805 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:29" (1/1) ... [2021-11-23 02:11:30,848 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:11:30,850 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:11:30,850 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:11:30,850 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:11:30,851 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:29" (1/1) ... [2021-11-23 02:11:30,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:11:30,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baed38c0-6ccd-47e3-86f2-7d1189c3415c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:11:30,893 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baed38c0-6ccd-47e3-86f2-7d1189c3415c/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:11:30,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baed38c0-6ccd-47e3-86f2-7d1189c3415c/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:11:30,949 INFO L130 BoogieDeclarations]: Found specification of procedure drain_rx [2021-11-23 02:11:30,950 INFO L138 BoogieDeclarations]: Found implementation of procedure drain_rx [2021-11-23 02:11:30,950 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2021-11-23 02:11:30,950 INFO L130 BoogieDeclarations]: Found specification of procedure mdio_write [2021-11-23 02:11:30,950 INFO L138 BoogieDeclarations]: Found implementation of procedure mdio_write [2021-11-23 02:11:30,951 INFO L130 BoogieDeclarations]: Found specification of procedure miiport_write [2021-11-23 02:11:30,951 INFO L138 BoogieDeclarations]: Found implementation of procedure miiport_write [2021-11-23 02:11:30,951 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2021-11-23 02:11:30,951 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2021-11-23 02:11:30,951 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-23 02:11:30,952 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-23 02:11:30,952 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_alloc_skb [2021-11-23 02:11:30,952 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_alloc_skb [2021-11-23 02:11:30,952 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_tx_done [2021-11-23 02:11:30,952 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_tx_done [2021-11-23 02:11:30,952 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-23 02:11:30,953 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-23 02:11:30,953 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 02:11:30,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 02:11:30,953 INFO L130 BoogieDeclarations]: Found specification of procedure reinit_rx [2021-11-23 02:11:30,953 INFO L138 BoogieDeclarations]: Found implementation of procedure reinit_rx [2021-11-23 02:11:30,954 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2021-11-23 02:11:30,954 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2021-11-23 02:11:30,954 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-23 02:11:30,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-23 02:11:30,954 INFO L130 BoogieDeclarations]: Found specification of procedure reinit_ring [2021-11-23 02:11:30,955 INFO L138 BoogieDeclarations]: Found implementation of procedure reinit_ring [2021-11-23 02:11:30,955 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_ok [2021-11-23 02:11:30,955 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_ok [2021-11-23 02:11:30,955 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2021-11-23 02:11:30,955 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2021-11-23 02:11:30,955 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_on [2021-11-23 02:11:30,956 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_on [2021-11-23 02:11:30,956 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-11-23 02:11:30,956 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-11-23 02:11:30,956 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_61 [2021-11-23 02:11:30,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_61 [2021-11-23 02:11:30,957 INFO L130 BoogieDeclarations]: Found specification of procedure pci_name [2021-11-23 02:11:30,957 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_name [2021-11-23 02:11:30,957 INFO L130 BoogieDeclarations]: Found specification of procedure pci_get_drvdata [2021-11-23 02:11:30,957 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_get_drvdata [2021-11-23 02:11:30,958 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-23 02:11:30,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-23 02:11:30,959 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-11-23 02:11:30,960 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-11-23 02:11:30,960 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-23 02:11:30,960 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-23 02:11:30,960 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-23 02:11:30,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-23 02:11:30,961 INFO L130 BoogieDeclarations]: Found specification of procedure __set_rx_mode [2021-11-23 02:11:30,961 INFO L138 BoogieDeclarations]: Found implementation of procedure __set_rx_mode [2021-11-23 02:11:30,962 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_single [2021-11-23 02:11:30,962 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_single [2021-11-23 02:11:30,962 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_attach [2021-11-23 02:11:30,963 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_attach [2021-11-23 02:11:30,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:11:30,963 INFO L130 BoogieDeclarations]: Found specification of procedure iounmap [2021-11-23 02:11:30,963 INFO L138 BoogieDeclarations]: Found implementation of procedure iounmap [2021-11-23 02:11:30,963 INFO L130 BoogieDeclarations]: Found specification of procedure netif_queue_stopped [2021-11-23 02:11:30,964 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_queue_stopped [2021-11-23 02:11:30,964 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_del_timer_sync [2021-11-23 02:11:30,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_del_timer_sync [2021-11-23 02:11:30,965 INFO L130 BoogieDeclarations]: Found specification of procedure eeprom_read [2021-11-23 02:11:30,965 INFO L138 BoogieDeclarations]: Found implementation of procedure eeprom_read [2021-11-23 02:11:30,965 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-23 02:11:30,965 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-23 02:11:30,965 INFO L130 BoogieDeclarations]: Found specification of procedure natsemi_stop_rxtx [2021-11-23 02:11:30,965 INFO L138 BoogieDeclarations]: Found implementation of procedure natsemi_stop_rxtx [2021-11-23 02:11:30,966 INFO L130 BoogieDeclarations]: Found specification of procedure ns_tx_timeout [2021-11-23 02:11:30,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ns_tx_timeout [2021-11-23 02:11:30,966 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-23 02:11:30,967 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-23 02:11:30,967 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-23 02:11:30,967 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_netdev [2021-11-23 02:11:30,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_netdev [2021-11-23 02:11:30,968 INFO L130 BoogieDeclarations]: Found specification of procedure natsemi_reset [2021-11-23 02:11:30,968 INFO L138 BoogieDeclarations]: Found implementation of procedure natsemi_reset [2021-11-23 02:11:30,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-23 02:11:30,969 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-23 02:11:30,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-23 02:11:30,969 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:11:30,969 INFO L130 BoogieDeclarations]: Found specification of procedure set_rx_mode [2021-11-23 02:11:30,970 INFO L138 BoogieDeclarations]: Found implementation of procedure set_rx_mode [2021-11-23 02:11:30,971 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2021-11-23 02:11:30,971 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2021-11-23 02:11:30,971 INFO L130 BoogieDeclarations]: Found specification of procedure move_int_phy [2021-11-23 02:11:30,971 INFO L138 BoogieDeclarations]: Found implementation of procedure move_int_phy [2021-11-23 02:11:30,972 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-23 02:11:30,972 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-23 02:11:30,972 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_interrupt_context [2021-11-23 02:11:30,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_interrupt_context [2021-11-23 02:11:30,973 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2021-11-23 02:11:30,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2021-11-23 02:11:30,973 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2021-11-23 02:11:30,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2021-11-23 02:11:30,973 INFO L130 BoogieDeclarations]: Found specification of procedure enable_wol_mode [2021-11-23 02:11:30,974 INFO L138 BoogieDeclarations]: Found implementation of procedure enable_wol_mode [2021-11-23 02:11:30,974 INFO L130 BoogieDeclarations]: Found specification of procedure natsemi_resume [2021-11-23 02:11:30,974 INFO L138 BoogieDeclarations]: Found implementation of procedure natsemi_resume [2021-11-23 02:11:30,974 INFO L130 BoogieDeclarations]: Found specification of procedure napi_enable [2021-11-23 02:11:30,975 INFO L138 BoogieDeclarations]: Found implementation of procedure napi_enable [2021-11-23 02:11:30,975 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-23 02:11:30,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-23 02:11:30,975 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:11:30,976 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_1 [2021-11-23 02:11:30,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_1 [2021-11-23 02:11:30,980 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_0 [2021-11-23 02:11:30,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_0 [2021-11-23 02:11:30,981 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mod_timer [2021-11-23 02:11:30,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mod_timer [2021-11-23 02:11:30,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:11:30,982 INFO L130 BoogieDeclarations]: Found specification of procedure mii_getbit [2021-11-23 02:11:30,982 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_getbit [2021-11-23 02:11:30,982 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-23 02:11:30,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-23 02:11:30,989 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-23 02:11:30,990 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-23 02:11:30,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:11:30,990 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-23 02:11:30,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-23 02:11:30,990 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2021-11-23 02:11:30,990 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2021-11-23 02:11:30,991 INFO L130 BoogieDeclarations]: Found specification of procedure natsemi_poll_controller [2021-11-23 02:11:30,991 INFO L138 BoogieDeclarations]: Found implementation of procedure natsemi_poll_controller [2021-11-23 02:11:30,991 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_spin_lock [2021-11-23 02:11:30,991 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_spin_lock [2021-11-23 02:11:30,991 INFO L130 BoogieDeclarations]: Found specification of procedure check_link [2021-11-23 02:11:30,991 INFO L138 BoogieDeclarations]: Found implementation of procedure check_link [2021-11-23 02:11:30,991 INFO L130 BoogieDeclarations]: Found specification of procedure napi_disable [2021-11-23 02:11:30,992 INFO L138 BoogieDeclarations]: Found implementation of procedure napi_disable [2021-11-23 02:11:30,992 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-23 02:11:30,992 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-23 02:11:30,992 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2021-11-23 02:11:30,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2021-11-23 02:11:30,992 INFO L130 BoogieDeclarations]: Found specification of procedure writel [2021-11-23 02:11:30,993 INFO L138 BoogieDeclarations]: Found implementation of procedure writel [2021-11-23 02:11:30,993 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-23 02:11:30,993 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-23 02:11:30,993 INFO L130 BoogieDeclarations]: Found specification of procedure init_phy_fixup [2021-11-23 02:11:30,993 INFO L138 BoogieDeclarations]: Found implementation of procedure init_phy_fixup [2021-11-23 02:11:30,993 INFO L130 BoogieDeclarations]: Found specification of procedure writew [2021-11-23 02:11:30,993 INFO L138 BoogieDeclarations]: Found implementation of procedure writew [2021-11-23 02:11:30,994 INFO L130 BoogieDeclarations]: Found specification of procedure mdio_read [2021-11-23 02:11:30,994 INFO L138 BoogieDeclarations]: Found implementation of procedure mdio_read [2021-11-23 02:11:30,994 INFO L130 BoogieDeclarations]: Found specification of procedure mii_nway_result [2021-11-23 02:11:30,994 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_nway_result [2021-11-23 02:11:30,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:11:30,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:11:30,995 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-23 02:11:30,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 02:11:30,995 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-23 02:11:30,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-23 02:11:30,995 INFO L130 BoogieDeclarations]: Found specification of procedure switch_port_external [2021-11-23 02:11:30,995 INFO L138 BoogieDeclarations]: Found implementation of procedure switch_port_external [2021-11-23 02:11:30,995 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_close [2021-11-23 02:11:30,996 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_close [2021-11-23 02:11:30,996 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-23 02:11:30,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-23 02:11:30,996 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_off [2021-11-23 02:11:30,996 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_off [2021-11-23 02:11:30,996 INFO L130 BoogieDeclarations]: Found specification of procedure get_eeprom_len [2021-11-23 02:11:30,997 INFO L138 BoogieDeclarations]: Found implementation of procedure get_eeprom_len [2021-11-23 02:11:30,997 INFO L130 BoogieDeclarations]: Found specification of procedure rtnl_unlock [2021-11-23 02:11:30,997 INFO L138 BoogieDeclarations]: Found implementation of procedure rtnl_unlock [2021-11-23 02:11:30,997 INFO L130 BoogieDeclarations]: Found specification of procedure disable_irq [2021-11-23 02:11:30,997 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_irq [2021-11-23 02:11:30,997 INFO L130 BoogieDeclarations]: Found specification of procedure get_regs_len [2021-11-23 02:11:30,997 INFO L138 BoogieDeclarations]: Found implementation of procedure get_regs_len [2021-11-23 02:11:30,998 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_process_context [2021-11-23 02:11:30,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_process_context [2021-11-23 02:11:30,998 INFO L130 BoogieDeclarations]: Found specification of procedure nway_reset [2021-11-23 02:11:30,998 INFO L138 BoogieDeclarations]: Found implementation of procedure nway_reset [2021-11-23 02:11:30,998 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_lock_of_netdev_private [2021-11-23 02:11:30,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_lock_of_netdev_private [2021-11-23 02:11:30,998 INFO L130 BoogieDeclarations]: Found specification of procedure pci_map_single [2021-11-23 02:11:30,999 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_map_single [2021-11-23 02:11:30,999 INFO L130 BoogieDeclarations]: Found specification of procedure ethtool_cmd_speed_set [2021-11-23 02:11:30,999 INFO L138 BoogieDeclarations]: Found implementation of procedure ethtool_cmd_speed_set [2021-11-23 02:11:30,999 INFO L130 BoogieDeclarations]: Found specification of procedure init_registers [2021-11-23 02:11:31,001 INFO L138 BoogieDeclarations]: Found implementation of procedure init_registers [2021-11-23 02:11:31,001 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-23 02:11:31,001 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-23 02:11:31,001 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2021-11-23 02:11:31,002 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2021-11-23 02:11:31,002 INFO L130 BoogieDeclarations]: Found specification of procedure round_jiffies [2021-11-23 02:11:31,002 INFO L138 BoogieDeclarations]: Found implementation of procedure round_jiffies [2021-11-23 02:11:31,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:11:31,002 INFO L130 BoogieDeclarations]: Found specification of procedure switch_port_internal [2021-11-23 02:11:31,002 INFO L138 BoogieDeclarations]: Found implementation of procedure switch_port_internal [2021-11-23 02:11:31,003 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-11-23 02:11:31,003 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-11-23 02:11:31,003 INFO L130 BoogieDeclarations]: Found specification of procedure dump_ring [2021-11-23 02:11:31,003 INFO L138 BoogieDeclarations]: Found implementation of procedure dump_ring [2021-11-23 02:11:31,003 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:11:31,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 02:11:31,003 INFO L130 BoogieDeclarations]: Found specification of procedure intr_handler [2021-11-23 02:11:31,004 INFO L138 BoogieDeclarations]: Found implementation of procedure intr_handler [2021-11-23 02:11:31,004 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-23 02:11:31,004 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-23 02:11:31,004 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_lock_of_netdev_private [2021-11-23 02:11:31,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_lock_of_netdev_private [2021-11-23 02:11:31,004 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_irq_68 [2021-11-23 02:11:31,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_irq_68 [2021-11-23 02:11:31,005 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-23 02:11:31,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-23 02:11:31,005 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_irq [2021-11-23 02:11:31,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_irq [2021-11-23 02:11:31,005 INFO L130 BoogieDeclarations]: Found specification of procedure __get_stats [2021-11-23 02:11:31,005 INFO L138 BoogieDeclarations]: Found implementation of procedure __get_stats [2021-11-23 02:11:31,006 INFO L130 BoogieDeclarations]: Found specification of procedure set_bufsize [2021-11-23 02:11:31,006 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bufsize [2021-11-23 02:11:31,006 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_irq [2021-11-23 02:11:31,006 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_irq [2021-11-23 02:11:31,006 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_open [2021-11-23 02:11:31,006 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_open [2021-11-23 02:11:31,006 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_84 [2021-11-23 02:11:31,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_84 [2021-11-23 02:11:31,007 INFO L130 BoogieDeclarations]: Found specification of procedure drain_ring [2021-11-23 02:11:31,007 INFO L138 BoogieDeclarations]: Found implementation of procedure drain_ring [2021-11-23 02:11:31,007 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-11-23 02:11:31,007 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-11-23 02:11:31,007 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-23 02:11:31,007 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-23 02:11:31,008 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer_sync [2021-11-23 02:11:31,008 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer_sync [2021-11-23 02:11:31,008 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-23 02:11:31,008 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-23 02:11:31,008 INFO L130 BoogieDeclarations]: Found specification of procedure natsemi_remove1 [2021-11-23 02:11:31,008 INFO L138 BoogieDeclarations]: Found implementation of procedure natsemi_remove1 [2021-11-23 02:11:31,009 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_EMGentry_exit_natsemi_exit_mod_15_2 [2021-11-23 02:11:31,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_EMGentry_exit_natsemi_exit_mod_15_2 [2021-11-23 02:11:31,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:11:31,010 INFO L130 BoogieDeclarations]: Found specification of procedure init_ring [2021-11-23 02:11:31,014 INFO L138 BoogieDeclarations]: Found implementation of procedure init_ring [2021-11-23 02:11:31,014 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-23 02:11:31,015 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-23 02:11:31,015 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_85 [2021-11-23 02:11:31,015 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_85 [2021-11-23 02:11:31,015 INFO L130 BoogieDeclarations]: Found specification of procedure natsemi_irq_disable [2021-11-23 02:11:31,015 INFO L138 BoogieDeclarations]: Found implementation of procedure natsemi_irq_disable [2021-11-23 02:11:31,015 INFO L130 BoogieDeclarations]: Found specification of procedure enable_irq [2021-11-23 02:11:31,016 INFO L138 BoogieDeclarations]: Found implementation of procedure enable_irq [2021-11-23 02:11:31,017 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2021-11-23 02:11:31,018 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2021-11-23 02:11:31,018 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irq_69 [2021-11-23 02:11:31,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irq_69 [2021-11-23 02:11:31,018 INFO L130 BoogieDeclarations]: Found specification of procedure pci_enable_device [2021-11-23 02:11:31,018 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_enable_device [2021-11-23 02:11:31,018 INFO L130 BoogieDeclarations]: Found specification of procedure rtnl_lock [2021-11-23 02:11:31,018 INFO L138 BoogieDeclarations]: Found implementation of procedure rtnl_lock [2021-11-23 02:11:31,019 INFO L130 BoogieDeclarations]: Found specification of procedure ns_ioaddr [2021-11-23 02:11:31,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ns_ioaddr [2021-11-23 02:11:31,019 INFO L130 BoogieDeclarations]: Found specification of procedure mii_send_bits [2021-11-23 02:11:31,019 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_send_bits [2021-11-23 02:11:31,019 INFO L130 BoogieDeclarations]: Found specification of procedure refill_rx [2021-11-23 02:11:31,019 INFO L138 BoogieDeclarations]: Found implementation of procedure refill_rx [2021-11-23 02:11:31,020 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-23 02:11:31,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-23 02:11:31,020 INFO L130 BoogieDeclarations]: Found specification of procedure ethtool_cmd_speed [2021-11-23 02:11:31,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ethtool_cmd_speed [2021-11-23 02:11:31,020 INFO L130 BoogieDeclarations]: Found specification of procedure readw [2021-11-23 02:11:31,020 INFO L138 BoogieDeclarations]: Found implementation of procedure readw [2021-11-23 02:11:31,020 INFO L130 BoogieDeclarations]: Found specification of procedure drain_tx [2021-11-23 02:11:31,021 INFO L138 BoogieDeclarations]: Found implementation of procedure drain_tx [2021-11-23 02:11:31,021 INFO L130 BoogieDeclarations]: Found specification of procedure natsemi_irq_enable [2021-11-23 02:11:31,021 INFO L138 BoogieDeclarations]: Found implementation of procedure natsemi_irq_enable [2021-11-23 02:11:31,021 INFO L130 BoogieDeclarations]: Found specification of procedure readl [2021-11-23 02:11:31,021 INFO L138 BoogieDeclarations]: Found implementation of procedure readl [2021-11-23 02:11:31,021 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:11:31,021 INFO L130 BoogieDeclarations]: Found specification of procedure miiport_read [2021-11-23 02:11:31,022 INFO L138 BoogieDeclarations]: Found implementation of procedure miiport_read [2021-11-23 02:11:31,022 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-23 02:11:31,022 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-23 02:11:31,022 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_netdev [2021-11-23 02:11:31,022 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_netdev [2021-11-23 02:11:32,159 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:11:32,165 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:11:32,738 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-23 02:11:36,745 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-23 02:11:36,882 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:11:38,883 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:11:38,883 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 02:11:38,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:11:38 BoogieIcfgContainer [2021-11-23 02:11:38,889 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:11:38,893 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:11:38,893 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:11:38,897 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:11:38,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:11:24" (1/3) ... [2021-11-23 02:11:38,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ea6055a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:11:38, skipping insertion in model container [2021-11-23 02:11:38,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:29" (2/3) ... [2021-11-23 02:11:38,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ea6055a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:11:38, skipping insertion in model container [2021-11-23 02:11:38,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:11:38" (3/3) ... [2021-11-23 02:11:38,901 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-natsemi-natsemi.cil.i [2021-11-23 02:11:38,910 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:11:38,910 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-23 02:11:38,988 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:11:39,007 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 [2021-11-23 02:11:39,010 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-23 02:11:39,089 INFO L276 IsEmpty]: Start isEmpty. Operand has 1935 states, 1055 states have (on average 1.2654028436018958) internal successors, (1335), 1092 states have internal predecessors, (1335), 749 states have call successors, (749), 129 states have call predecessors, (749), 128 states have return successors, (743), 734 states have call predecessors, (743), 743 states have call successors, (743) [2021-11-23 02:11:39,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-23 02:11:39,118 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:11:39,119 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:11:39,120 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)] === [2021-11-23 02:11:39,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:11:39,127 INFO L85 PathProgramCache]: Analyzing trace with hash 2018338776, now seen corresponding path program 1 times [2021-11-23 02:11:39,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:11:39,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411574181] [2021-11-23 02:11:39,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:39,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:11:39,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:39,937 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2021-11-23 02:11:39,938 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:11:39,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411574181] [2021-11-23 02:11:39,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411574181] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:11:39,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:11:39,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:11:39,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886653138] [2021-11-23 02:11:39,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:11:39,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:11:39,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:11:39,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:11:39,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:11:39,983 INFO L87 Difference]: Start difference. First operand has 1935 states, 1055 states have (on average 1.2654028436018958) internal successors, (1335), 1092 states have internal predecessors, (1335), 749 states have call successors, (749), 129 states have call predecessors, (749), 128 states have return successors, (743), 734 states have call predecessors, (743), 743 states have call successors, (743) Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-23 02:11:43,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:11:43,455 INFO L93 Difference]: Finished difference Result 5669 states and 8427 transitions. [2021-11-23 02:11:43,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:11:43,458 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 171 [2021-11-23 02:11:43,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:11:43,515 INFO L225 Difference]: With dead ends: 5669 [2021-11-23 02:11:43,516 INFO L226 Difference]: Without dead ends: 3755 [2021-11-23 02:11:43,536 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 [2021-11-23 02:11:43,540 INFO L933 BasicCegarLoop]: 3200 mSDtfsCounter, 2692 mSDsluCounter, 2776 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2692 SdHoareTripleChecker+Valid, 5664 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:11:43,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2692 Valid, 5664 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-23 02:11:43,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3755 states. [2021-11-23 02:11:43,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3755 to 3751. [2021-11-23 02:11:43,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3751 states, 2057 states have (on average 1.261059795819154) internal successors, (2594), 2130 states have internal predecessors, (2594), 1439 states have call successors, (1439), 253 states have call predecessors, (1439), 252 states have return successors, (1435), 1417 states have call predecessors, (1435), 1435 states have call successors, (1435) [2021-11-23 02:11:43,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3751 states to 3751 states and 5468 transitions. [2021-11-23 02:11:43,949 INFO L78 Accepts]: Start accepts. Automaton has 3751 states and 5468 transitions. Word has length 171 [2021-11-23 02:11:43,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:11:43,953 INFO L470 AbstractCegarLoop]: Abstraction has 3751 states and 5468 transitions. [2021-11-23 02:11:43,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-23 02:11:43,956 INFO L276 IsEmpty]: Start isEmpty. Operand 3751 states and 5468 transitions. [2021-11-23 02:11:43,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-23 02:11:43,971 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:11:43,972 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:11:43,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:11:43,973 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)] === [2021-11-23 02:11:43,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:11:43,975 INFO L85 PathProgramCache]: Analyzing trace with hash 54522437, now seen corresponding path program 1 times [2021-11-23 02:11:43,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:11:43,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602671941] [2021-11-23 02:11:43,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:43,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:11:44,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:44,314 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2021-11-23 02:11:44,314 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:11:44,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602671941] [2021-11-23 02:11:44,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602671941] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:11:44,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:11:44,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:11:44,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624275111] [2021-11-23 02:11:44,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:11:44,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:11:44,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:11:44,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:11:44,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:11:44,321 INFO L87 Difference]: Start difference. First operand 3751 states and 5468 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-23 02:11:47,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:11:47,586 INFO L93 Difference]: Finished difference Result 10407 states and 15096 transitions. [2021-11-23 02:11:47,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:11:47,586 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 179 [2021-11-23 02:11:47,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:11:47,657 INFO L225 Difference]: With dead ends: 10407 [2021-11-23 02:11:47,657 INFO L226 Difference]: Without dead ends: 6687 [2021-11-23 02:11:47,683 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 [2021-11-23 02:11:47,685 INFO L933 BasicCegarLoop]: 3068 mSDtfsCounter, 2149 mSDsluCounter, 2706 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2149 SdHoareTripleChecker+Valid, 5495 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:11:47,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2149 Valid, 5495 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-23 02:11:47,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6687 states. [2021-11-23 02:11:48,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6687 to 6658. [2021-11-23 02:11:48,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6658 states, 3614 states have (on average 1.2476480354178197) internal successors, (4509), 3750 states have internal predecessors, (4509), 2560 states have call successors, (2560), 486 states have call predecessors, (2560), 481 states have return successors, (2558), 2509 states have call predecessors, (2558), 2556 states have call successors, (2558) [2021-11-23 02:11:48,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6658 states to 6658 states and 9627 transitions. [2021-11-23 02:11:48,310 INFO L78 Accepts]: Start accepts. Automaton has 6658 states and 9627 transitions. Word has length 179 [2021-11-23 02:11:48,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:11:48,311 INFO L470 AbstractCegarLoop]: Abstraction has 6658 states and 9627 transitions. [2021-11-23 02:11:48,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-23 02:11:48,312 INFO L276 IsEmpty]: Start isEmpty. Operand 6658 states and 9627 transitions. [2021-11-23 02:11:48,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-11-23 02:11:48,317 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:11:48,317 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:11:48,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:11:48,317 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)] === [2021-11-23 02:11:48,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:11:48,318 INFO L85 PathProgramCache]: Analyzing trace with hash -770422812, now seen corresponding path program 1 times [2021-11-23 02:11:48,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:11:48,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944828948] [2021-11-23 02:11:48,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:48,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:11:48,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:48,599 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2021-11-23 02:11:48,600 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:11:48,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944828948] [2021-11-23 02:11:48,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944828948] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:11:48,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:11:48,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:11:48,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819929120] [2021-11-23 02:11:48,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:11:48,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:11:48,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:11:48,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:11:48,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:11:48,604 INFO L87 Difference]: Start difference. First operand 6658 states and 9627 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-23 02:11:52,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:11:52,790 INFO L93 Difference]: Finished difference Result 12773 states and 18402 transitions. [2021-11-23 02:11:52,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:11:52,791 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 181 [2021-11-23 02:11:52,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:11:52,869 INFO L225 Difference]: With dead ends: 12773 [2021-11-23 02:11:52,870 INFO L226 Difference]: Without dead ends: 6146 [2021-11-23 02:11:53,046 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 [2021-11-23 02:11:53,051 INFO L933 BasicCegarLoop]: 3663 mSDtfsCounter, 1954 mSDsluCounter, 2750 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1954 SdHoareTripleChecker+Valid, 6105 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:11:53,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1954 Valid, 6105 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-11-23 02:11:53,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6146 states. [2021-11-23 02:11:53,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6146 to 6119. [2021-11-23 02:11:53,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6119 states, 3370 states have (on average 1.2456973293768545) internal successors, (4198), 3488 states have internal predecessors, (4198), 2273 states have call successors, (2273), 478 states have call predecessors, (2273), 473 states have return successors, (2270), 2224 states have call predecessors, (2270), 2269 states have call successors, (2270) [2021-11-23 02:11:53,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6119 states to 6119 states and 8741 transitions. [2021-11-23 02:11:53,534 INFO L78 Accepts]: Start accepts. Automaton has 6119 states and 8741 transitions. Word has length 181 [2021-11-23 02:11:53,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:11:53,536 INFO L470 AbstractCegarLoop]: Abstraction has 6119 states and 8741 transitions. [2021-11-23 02:11:53,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-23 02:11:53,538 INFO L276 IsEmpty]: Start isEmpty. Operand 6119 states and 8741 transitions. [2021-11-23 02:11:53,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-23 02:11:53,544 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:11:53,544 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 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] [2021-11-23 02:11:53,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:11:53,546 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:11:53,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:11:53,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1213775498, now seen corresponding path program 1 times [2021-11-23 02:11:53,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:11:53,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52324656] [2021-11-23 02:11:53,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:53,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:11:53,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:53,792 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 872 trivial. 0 not checked. [2021-11-23 02:11:53,792 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:11:53,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52324656] [2021-11-23 02:11:53,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52324656] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:11:53,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:11:53,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:11:53,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710087478] [2021-11-23 02:11:53,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:11:53,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:11:53,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:11:53,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:11:53,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:11:53,796 INFO L87 Difference]: Start difference. First operand 6119 states and 8741 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-23 02:11:56,559 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:11:58,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:11:58,163 INFO L93 Difference]: Finished difference Result 16253 states and 23216 transitions. [2021-11-23 02:11:58,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:11:58,164 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 187 [2021-11-23 02:11:58,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:11:58,266 INFO L225 Difference]: With dead ends: 16253 [2021-11-23 02:11:58,266 INFO L226 Difference]: Without dead ends: 10165 [2021-11-23 02:11:58,306 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 [2021-11-23 02:11:58,308 INFO L933 BasicCegarLoop]: 3129 mSDtfsCounter, 2657 mSDsluCounter, 2636 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2657 SdHoareTripleChecker+Valid, 5458 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:11:58,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2657 Valid, 5458 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-11-23 02:11:58,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10165 states. [2021-11-23 02:11:58,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10165 to 10136. [2021-11-23 02:11:58,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10136 states, 5654 states have (on average 1.25221082419526) internal successors, (7080), 5847 states have internal predecessors, (7080), 3697 states have call successors, (3697), 797 states have call predecessors, (3697), 782 states have return successors, (3702), 3604 states have call predecessors, (3702), 3693 states have call successors, (3702) [2021-11-23 02:11:59,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10136 states to 10136 states and 14479 transitions. [2021-11-23 02:11:59,040 INFO L78 Accepts]: Start accepts. Automaton has 10136 states and 14479 transitions. Word has length 187 [2021-11-23 02:11:59,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:11:59,041 INFO L470 AbstractCegarLoop]: Abstraction has 10136 states and 14479 transitions. [2021-11-23 02:11:59,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-23 02:11:59,041 INFO L276 IsEmpty]: Start isEmpty. Operand 10136 states and 14479 transitions. [2021-11-23 02:11:59,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-23 02:11:59,045 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:11:59,045 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 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] [2021-11-23 02:11:59,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:11:59,046 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:11:59,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:11:59,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1769465417, now seen corresponding path program 1 times [2021-11-23 02:11:59,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:11:59,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267979965] [2021-11-23 02:11:59,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:59,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:11:59,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:59,223 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 873 trivial. 0 not checked. [2021-11-23 02:11:59,223 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:11:59,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267979965] [2021-11-23 02:11:59,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267979965] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:11:59,224 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:11:59,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:11:59,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969053756] [2021-11-23 02:11:59,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:11:59,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:11:59,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:11:59,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:11:59,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:11:59,226 INFO L87 Difference]: Start difference. First operand 10136 states and 14479 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2021-11-23 02:12:03,556 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:12:04,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:12:04,282 INFO L93 Difference]: Finished difference Result 29767 states and 42541 transitions. [2021-11-23 02:12:04,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:12:04,283 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 195 [2021-11-23 02:12:04,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:12:04,431 INFO L225 Difference]: With dead ends: 29767 [2021-11-23 02:12:04,431 INFO L226 Difference]: Without dead ends: 19662 [2021-11-23 02:12:04,504 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 [2021-11-23 02:12:04,505 INFO L933 BasicCegarLoop]: 3218 mSDtfsCounter, 2680 mSDsluCounter, 2778 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2681 SdHoareTripleChecker+Valid, 5683 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:12:04,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2681 Valid, 5683 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 667 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2021-11-23 02:12:04,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19662 states. [2021-11-23 02:12:05,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19662 to 19621. [2021-11-23 02:12:05,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19621 states, 10925 states have (on average 1.2490617848970251) internal successors, (13646), 11325 states have internal predecessors, (13646), 7175 states have call successors, (7175), 1547 states have call predecessors, (7175), 1518 states have return successors, (7193), 6974 states have call predecessors, (7193), 7171 states have call successors, (7193) [2021-11-23 02:12:05,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19621 states to 19621 states and 28014 transitions. [2021-11-23 02:12:05,964 INFO L78 Accepts]: Start accepts. Automaton has 19621 states and 28014 transitions. Word has length 195 [2021-11-23 02:12:05,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:12:05,969 INFO L470 AbstractCegarLoop]: Abstraction has 19621 states and 28014 transitions. [2021-11-23 02:12:05,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2021-11-23 02:12:05,970 INFO L276 IsEmpty]: Start isEmpty. Operand 19621 states and 28014 transitions. [2021-11-23 02:12:05,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-11-23 02:12:05,975 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:12:05,975 INFO L514 BasicCegarLoop]: trace histogram [19, 15, 15, 15, 15, 15, 15, 4, 4, 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] [2021-11-23 02:12:05,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:12:05,976 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)] === [2021-11-23 02:12:05,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:12:05,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1751786339, now seen corresponding path program 1 times [2021-11-23 02:12:05,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:12:05,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863043478] [2021-11-23 02:12:05,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:12:05,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:12:06,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:12:06,331 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 999 trivial. 0 not checked. [2021-11-23 02:12:06,332 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:12:06,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863043478] [2021-11-23 02:12:06,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863043478] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:12:06,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:12:06,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:12:06,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887604721] [2021-11-23 02:12:06,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:12:06,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:12:06,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:12:06,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:12:06,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:12:06,335 INFO L87 Difference]: Start difference. First operand 19621 states and 28014 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-23 02:12:10,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:12:10,984 INFO L93 Difference]: Finished difference Result 19627 states and 28019 transitions. [2021-11-23 02:12:10,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:12:10,984 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 213 [2021-11-23 02:12:10,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:12:11,103 INFO L225 Difference]: With dead ends: 19627 [2021-11-23 02:12:11,103 INFO L226 Difference]: Without dead ends: 19625 [2021-11-23 02:12:11,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:12:11,116 INFO L933 BasicCegarLoop]: 2477 mSDtfsCounter, 2743 mSDsluCounter, 5585 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2754 SdHoareTripleChecker+Valid, 7418 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:12:11,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2754 Valid, 7418 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 985 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-11-23 02:12:11,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19625 states. [2021-11-23 02:12:12,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19625 to 19625. [2021-11-23 02:12:12,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19625 states, 10928 states have (on average 1.248993411420205) internal successors, (13649), 11328 states have internal predecessors, (13649), 7175 states have call successors, (7175), 1548 states have call predecessors, (7175), 1519 states have return successors, (7193), 6974 states have call predecessors, (7193), 7171 states have call successors, (7193) [2021-11-23 02:12:12,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19625 states to 19625 states and 28017 transitions. [2021-11-23 02:12:12,613 INFO L78 Accepts]: Start accepts. Automaton has 19625 states and 28017 transitions. Word has length 213 [2021-11-23 02:12:12,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:12:12,614 INFO L470 AbstractCegarLoop]: Abstraction has 19625 states and 28017 transitions. [2021-11-23 02:12:12,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-23 02:12:12,615 INFO L276 IsEmpty]: Start isEmpty. Operand 19625 states and 28017 transitions. [2021-11-23 02:12:12,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-11-23 02:12:12,621 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:12:12,621 INFO L514 BasicCegarLoop]: trace histogram [19, 15, 15, 15, 15, 15, 15, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:12:12,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 02:12:12,622 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:12:12,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:12:12,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1073752993, now seen corresponding path program 1 times [2021-11-23 02:12:12,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:12:12,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602374530] [2021-11-23 02:12:12,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:12:12,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:12:12,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:12:12,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1006 trivial. 0 not checked. [2021-11-23 02:12:12,958 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:12:12,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602374530] [2021-11-23 02:12:12,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602374530] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:12:12,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:12:12,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:12:12,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065637420] [2021-11-23 02:12:12,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:12:12,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:12:12,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:12:12,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:12:12,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:12:12,961 INFO L87 Difference]: Start difference. First operand 19625 states and 28017 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 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) [2021-11-23 02:12:17,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:12:17,716 INFO L93 Difference]: Finished difference Result 19631 states and 28022 transitions. [2021-11-23 02:12:17,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:12:17,717 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 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 221 [2021-11-23 02:12:17,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:12:17,831 INFO L225 Difference]: With dead ends: 19631 [2021-11-23 02:12:17,832 INFO L226 Difference]: Without dead ends: 19629 [2021-11-23 02:12:17,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:12:17,846 INFO L933 BasicCegarLoop]: 2480 mSDtfsCounter, 2737 mSDsluCounter, 5585 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2747 SdHoareTripleChecker+Valid, 7421 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:12:17,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2747 Valid, 7421 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 985 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-11-23 02:12:17,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19629 states. [2021-11-23 02:12:18,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19629 to 19629. [2021-11-23 02:12:18,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19629 states, 10931 states have (on average 1.2489250754734242) internal successors, (13652), 11331 states have internal predecessors, (13652), 7175 states have call successors, (7175), 1549 states have call predecessors, (7175), 1520 states have return successors, (7193), 6974 states have call predecessors, (7193), 7171 states have call successors, (7193) [2021-11-23 02:12:19,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19629 states to 19629 states and 28020 transitions. [2021-11-23 02:12:19,007 INFO L78 Accepts]: Start accepts. Automaton has 19629 states and 28020 transitions. Word has length 221 [2021-11-23 02:12:19,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:12:19,008 INFO L470 AbstractCegarLoop]: Abstraction has 19629 states and 28020 transitions. [2021-11-23 02:12:19,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 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) [2021-11-23 02:12:19,008 INFO L276 IsEmpty]: Start isEmpty. Operand 19629 states and 28020 transitions. [2021-11-23 02:12:19,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-11-23 02:12:19,015 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:12:19,015 INFO L514 BasicCegarLoop]: trace histogram [19, 15, 15, 15, 15, 15, 15, 4, 4, 3, 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] [2021-11-23 02:12:19,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 02:12:19,016 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)] === [2021-11-23 02:12:19,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:12:19,016 INFO L85 PathProgramCache]: Analyzing trace with hash 14923811, now seen corresponding path program 1 times [2021-11-23 02:12:19,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:12:19,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425480] [2021-11-23 02:12:19,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:12:19,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:12:19,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:12:19,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1007 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2021-11-23 02:12:19,484 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:12:19,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425480] [2021-11-23 02:12:19,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425480] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:12:19,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:12:19,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:12:19,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252608460] [2021-11-23 02:12:19,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:12:19,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:12:19,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:12:19,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:12:19,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:12:19,487 INFO L87 Difference]: Start difference. First operand 19629 states and 28020 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 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) [2021-11-23 02:12:23,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:12:23,709 INFO L93 Difference]: Finished difference Result 19635 states and 28025 transitions. [2021-11-23 02:12:23,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:12:23,709 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 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 223 [2021-11-23 02:12:23,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:12:23,837 INFO L225 Difference]: With dead ends: 19635 [2021-11-23 02:12:23,837 INFO L226 Difference]: Without dead ends: 19633 [2021-11-23 02:12:23,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:12:23,854 INFO L933 BasicCegarLoop]: 2480 mSDtfsCounter, 2738 mSDsluCounter, 5585 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2747 SdHoareTripleChecker+Valid, 7421 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:12:23,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2747 Valid, 7421 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 985 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-23 02:12:23,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19633 states. [2021-11-23 02:12:25,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19633 to 19633. [2021-11-23 02:12:25,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19633 states, 10934 states have (on average 1.248856777025791) internal successors, (13655), 11334 states have internal predecessors, (13655), 7175 states have call successors, (7175), 1550 states have call predecessors, (7175), 1521 states have return successors, (7193), 6974 states have call predecessors, (7193), 7171 states have call successors, (7193) [2021-11-23 02:12:25,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19633 states to 19633 states and 28023 transitions. [2021-11-23 02:12:25,180 INFO L78 Accepts]: Start accepts. Automaton has 19633 states and 28023 transitions. Word has length 223 [2021-11-23 02:12:25,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:12:25,181 INFO L470 AbstractCegarLoop]: Abstraction has 19633 states and 28023 transitions. [2021-11-23 02:12:25,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 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) [2021-11-23 02:12:25,182 INFO L276 IsEmpty]: Start isEmpty. Operand 19633 states and 28023 transitions. [2021-11-23 02:12:25,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-11-23 02:12:25,189 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:12:25,189 INFO L514 BasicCegarLoop]: trace histogram [19, 15, 15, 15, 15, 15, 15, 4, 4, 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] [2021-11-23 02:12:25,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 02:12:25,190 INFO L402 AbstractCegarLoop]: === Iteration 9 === 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)] === [2021-11-23 02:12:25,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:12:25,190 INFO L85 PathProgramCache]: Analyzing trace with hash 548883255, now seen corresponding path program 1 times [2021-11-23 02:12:25,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:12:25,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241134048] [2021-11-23 02:12:25,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:12:25,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:12:25,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:12:25,594 INFO L134 CoverageAnalysis]: Checked inductivity of 993 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2021-11-23 02:12:25,594 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:12:25,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241134048] [2021-11-23 02:12:25,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241134048] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:12:25,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:12:25,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:12:25,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190125662] [2021-11-23 02:12:25,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:12:25,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:12:25,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:12:25,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:12:25,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:12:25,599 INFO L87 Difference]: Start difference. First operand 19633 states and 28023 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-23 02:12:30,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:12:30,390 INFO L93 Difference]: Finished difference Result 46069 states and 65788 transitions. [2021-11-23 02:12:30,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:12:30,390 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) Word has length 228 [2021-11-23 02:12:30,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:12:30,562 INFO L225 Difference]: With dead ends: 46069 [2021-11-23 02:12:30,562 INFO L226 Difference]: Without dead ends: 26584 [2021-11-23 02:12:30,635 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 [2021-11-23 02:12:30,636 INFO L933 BasicCegarLoop]: 4094 mSDtfsCounter, 1949 mSDsluCounter, 2748 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1949 SdHoareTripleChecker+Valid, 6534 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:12:30,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1949 Valid, 6534 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-23 02:12:30,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26584 states. [2021-11-23 02:12:32,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26584 to 26533. [2021-11-23 02:12:32,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26533 states, 14856 states have (on average 1.2495288099084545) internal successors, (18563), 15386 states have internal predecessors, (18563), 9597 states have call successors, (9597), 2114 states have call predecessors, (9597), 2077 states have return successors, (9617), 9332 states have call predecessors, (9617), 9593 states have call successors, (9617) [2021-11-23 02:12:32,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26533 states to 26533 states and 37777 transitions. [2021-11-23 02:12:32,550 INFO L78 Accepts]: Start accepts. Automaton has 26533 states and 37777 transitions. Word has length 228 [2021-11-23 02:12:32,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:12:32,551 INFO L470 AbstractCegarLoop]: Abstraction has 26533 states and 37777 transitions. [2021-11-23 02:12:32,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-23 02:12:32,551 INFO L276 IsEmpty]: Start isEmpty. Operand 26533 states and 37777 transitions. [2021-11-23 02:12:32,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-11-23 02:12:32,558 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:12:32,558 INFO L514 BasicCegarLoop]: trace histogram [19, 15, 15, 15, 15, 15, 15, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:12:32,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 02:12:32,559 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)] === [2021-11-23 02:12:32,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:12:32,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1186664916, now seen corresponding path program 1 times [2021-11-23 02:12:32,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:12:32,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216384962] [2021-11-23 02:12:32,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:12:32,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:12:32,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:12:32,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1019 trivial. 0 not checked. [2021-11-23 02:12:32,820 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:12:32,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216384962] [2021-11-23 02:12:32,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216384962] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:12:32,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:12:32,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:12:32,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381464258] [2021-11-23 02:12:32,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:12:32,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:12:32,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:12:32,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:12:32,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:12:32,824 INFO L87 Difference]: Start difference. First operand 26533 states and 37777 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 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) [2021-11-23 02:12:36,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:12:36,985 INFO L93 Difference]: Finished difference Result 26539 states and 37782 transitions. [2021-11-23 02:12:36,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:12:36,986 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 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 232 [2021-11-23 02:12:36,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:12:37,138 INFO L225 Difference]: With dead ends: 26539 [2021-11-23 02:12:37,138 INFO L226 Difference]: Without dead ends: 26537 [2021-11-23 02:12:37,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:12:37,156 INFO L933 BasicCegarLoop]: 2480 mSDtfsCounter, 2737 mSDsluCounter, 5585 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2745 SdHoareTripleChecker+Valid, 7421 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:12:37,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2745 Valid, 7421 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 985 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-23 02:12:37,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26537 states. [2021-11-23 02:12:38,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26537 to 26537. [2021-11-23 02:12:38,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26537 states, 14859 states have (on average 1.2494784305807929) internal successors, (18566), 15389 states have internal predecessors, (18566), 9597 states have call successors, (9597), 2115 states have call predecessors, (9597), 2078 states have return successors, (9617), 9332 states have call predecessors, (9617), 9593 states have call successors, (9617) [2021-11-23 02:12:38,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26537 states to 26537 states and 37780 transitions. [2021-11-23 02:12:38,745 INFO L78 Accepts]: Start accepts. Automaton has 26537 states and 37780 transitions. Word has length 232 [2021-11-23 02:12:38,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:12:38,746 INFO L470 AbstractCegarLoop]: Abstraction has 26537 states and 37780 transitions. [2021-11-23 02:12:38,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 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) [2021-11-23 02:12:38,747 INFO L276 IsEmpty]: Start isEmpty. Operand 26537 states and 37780 transitions. [2021-11-23 02:12:38,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2021-11-23 02:12:38,754 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:12:38,754 INFO L514 BasicCegarLoop]: trace histogram [19, 15, 15, 15, 15, 15, 15, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:12:38,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 02:12:38,755 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)] === [2021-11-23 02:12:38,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:12:38,755 INFO L85 PathProgramCache]: Analyzing trace with hash 897101210, now seen corresponding path program 1 times [2021-11-23 02:12:38,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:12:38,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166597168] [2021-11-23 02:12:38,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:12:38,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:12:38,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:12:38,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1039 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1031 trivial. 0 not checked. [2021-11-23 02:12:38,979 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:12:38,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166597168] [2021-11-23 02:12:38,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166597168] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:12:38,980 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:12:38,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:12:38,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043901046] [2021-11-23 02:12:38,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:12:38,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:12:38,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:12:38,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:12:38,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:12:38,983 INFO L87 Difference]: Start difference. First operand 26537 states and 37780 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 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) [2021-11-23 02:12:43,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:12:43,388 INFO L93 Difference]: Finished difference Result 26543 states and 37785 transitions. [2021-11-23 02:12:43,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:12:43,389 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 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 237 [2021-11-23 02:12:43,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:12:43,531 INFO L225 Difference]: With dead ends: 26543 [2021-11-23 02:12:43,531 INFO L226 Difference]: Without dead ends: 26541 [2021-11-23 02:12:43,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:12:43,547 INFO L933 BasicCegarLoop]: 2480 mSDtfsCounter, 2737 mSDsluCounter, 5585 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2744 SdHoareTripleChecker+Valid, 7421 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:12:43,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2744 Valid, 7421 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 985 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-23 02:12:43,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26541 states. [2021-11-23 02:12:44,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26541 to 26541. [2021-11-23 02:12:44,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26541 states, 14862 states have (on average 1.2494280715919794) internal successors, (18569), 15392 states have internal predecessors, (18569), 9597 states have call successors, (9597), 2116 states have call predecessors, (9597), 2079 states have return successors, (9617), 9332 states have call predecessors, (9617), 9593 states have call successors, (9617) [2021-11-23 02:12:45,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26541 states to 26541 states and 37783 transitions. [2021-11-23 02:12:45,044 INFO L78 Accepts]: Start accepts. Automaton has 26541 states and 37783 transitions. Word has length 237 [2021-11-23 02:12:45,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:12:45,045 INFO L470 AbstractCegarLoop]: Abstraction has 26541 states and 37783 transitions. [2021-11-23 02:12:45,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 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) [2021-11-23 02:12:45,046 INFO L276 IsEmpty]: Start isEmpty. Operand 26541 states and 37783 transitions. [2021-11-23 02:12:45,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-11-23 02:12:45,054 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:12:45,054 INFO L514 BasicCegarLoop]: trace histogram [19, 15, 15, 15, 15, 15, 15, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:12:45,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 02:12:45,055 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)] === [2021-11-23 02:12:45,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:12:45,056 INFO L85 PathProgramCache]: Analyzing trace with hash 335362593, now seen corresponding path program 1 times [2021-11-23 02:12:45,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:12:45,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104004542] [2021-11-23 02:12:45,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:12:45,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:12:45,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:12:45,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1046 trivial. 0 not checked. [2021-11-23 02:12:45,296 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:12:45,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104004542] [2021-11-23 02:12:45,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104004542] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:12:45,297 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:12:45,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:12:45,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031004854] [2021-11-23 02:12:45,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:12:45,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:12:45,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:12:45,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:12:45,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:12:45,299 INFO L87 Difference]: Start difference. First operand 26541 states and 37783 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 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) [2021-11-23 02:12:49,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:12:49,896 INFO L93 Difference]: Finished difference Result 26547 states and 37788 transitions. [2021-11-23 02:12:49,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:12:49,897 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 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 241 [2021-11-23 02:12:49,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:12:49,996 INFO L225 Difference]: With dead ends: 26547 [2021-11-23 02:12:49,996 INFO L226 Difference]: Without dead ends: 26545 [2021-11-23 02:12:50,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:12:50,009 INFO L933 BasicCegarLoop]: 2480 mSDtfsCounter, 2737 mSDsluCounter, 5585 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2743 SdHoareTripleChecker+Valid, 7421 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:12:50,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2743 Valid, 7421 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 985 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-23 02:12:50,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26545 states. [2021-11-23 02:12:51,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26545 to 26545. [2021-11-23 02:12:51,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26545 states, 14865 states have (on average 1.2493777329297007) internal successors, (18572), 15395 states have internal predecessors, (18572), 9597 states have call successors, (9597), 2117 states have call predecessors, (9597), 2080 states have return successors, (9617), 9332 states have call predecessors, (9617), 9593 states have call successors, (9617) [2021-11-23 02:12:51,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26545 states to 26545 states and 37786 transitions. [2021-11-23 02:12:51,441 INFO L78 Accepts]: Start accepts. Automaton has 26545 states and 37786 transitions. Word has length 241 [2021-11-23 02:12:51,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:12:51,442 INFO L470 AbstractCegarLoop]: Abstraction has 26545 states and 37786 transitions. [2021-11-23 02:12:51,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 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) [2021-11-23 02:12:51,442 INFO L276 IsEmpty]: Start isEmpty. Operand 26545 states and 37786 transitions. [2021-11-23 02:12:51,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-11-23 02:12:51,451 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:12:51,451 INFO L514 BasicCegarLoop]: trace histogram [19, 15, 15, 15, 15, 15, 15, 7, 6, 6, 4, 4, 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] [2021-11-23 02:12:51,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 02:12:51,452 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)] === [2021-11-23 02:12:51,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:12:51,452 INFO L85 PathProgramCache]: Analyzing trace with hash -2070732381, now seen corresponding path program 1 times [2021-11-23 02:12:51,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:12:51,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991189719] [2021-11-23 02:12:51,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:12:51,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:12:51,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:12:51,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 1059 trivial. 0 not checked. [2021-11-23 02:12:51,682 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:12:51,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991189719] [2021-11-23 02:12:51,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991189719] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:12:51,683 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:12:51,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:12:51,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125253985] [2021-11-23 02:12:51,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:12:51,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:12:51,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:12:51,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:12:51,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:12:51,685 INFO L87 Difference]: Start difference. First operand 26545 states and 37786 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 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) [2021-11-23 02:12:57,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:12:57,216 INFO L93 Difference]: Finished difference Result 31123 states and 43583 transitions. [2021-11-23 02:12:57,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:12:57,217 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 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 243 [2021-11-23 02:12:57,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:12:57,358 INFO L225 Difference]: With dead ends: 31123 [2021-11-23 02:12:57,358 INFO L226 Difference]: Without dead ends: 31121 [2021-11-23 02:12:57,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:12:57,374 INFO L933 BasicCegarLoop]: 2778 mSDtfsCounter, 2053 mSDsluCounter, 7522 mSDsCounter, 0 mSdLazyCounter, 1167 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2058 SdHoareTripleChecker+Valid, 9498 SdHoareTripleChecker+Invalid, 1169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:12:57,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2058 Valid, 9498 Invalid, 1169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1167 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-11-23 02:12:57,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31121 states. [2021-11-23 02:12:59,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31121 to 31121. [2021-11-23 02:12:59,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31121 states, 17276 states have (on average 1.235181755035888) internal successors, (21339), 17858 states have internal predecessors, (21339), 11111 states have call successors, (11111), 2768 states have call predecessors, (11111), 2731 states have return successors, (11131), 10846 states have call predecessors, (11131), 11107 states have call successors, (11131) [2021-11-23 02:12:59,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31121 states to 31121 states and 43581 transitions. [2021-11-23 02:12:59,182 INFO L78 Accepts]: Start accepts. Automaton has 31121 states and 43581 transitions. Word has length 243 [2021-11-23 02:12:59,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:12:59,183 INFO L470 AbstractCegarLoop]: Abstraction has 31121 states and 43581 transitions. [2021-11-23 02:12:59,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 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) [2021-11-23 02:12:59,183 INFO L276 IsEmpty]: Start isEmpty. Operand 31121 states and 43581 transitions. [2021-11-23 02:12:59,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-11-23 02:12:59,191 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:12:59,192 INFO L514 BasicCegarLoop]: trace histogram [19, 15, 15, 15, 15, 15, 15, 8, 7, 7, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:12:59,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 02:12:59,192 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)] === [2021-11-23 02:12:59,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:12:59,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1330211028, now seen corresponding path program 1 times [2021-11-23 02:12:59,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:12:59,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212246139] [2021-11-23 02:12:59,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:12:59,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:12:59,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:12:59,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1091 trivial. 0 not checked. [2021-11-23 02:12:59,454 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:12:59,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212246139] [2021-11-23 02:12:59,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212246139] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:12:59,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:12:59,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:12:59,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274913057] [2021-11-23 02:12:59,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:12:59,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:12:59,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:12:59,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:12:59,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:12:59,457 INFO L87 Difference]: Start difference. First operand 31121 states and 43581 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-23 02:13:04,308 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:13:05,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:13:05,477 INFO L93 Difference]: Finished difference Result 31127 states and 43586 transitions. [2021-11-23 02:13:05,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:13:05,478 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 252 [2021-11-23 02:13:05,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:13:05,585 INFO L225 Difference]: With dead ends: 31127 [2021-11-23 02:13:05,585 INFO L226 Difference]: Without dead ends: 31125 [2021-11-23 02:13:05,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:13:05,596 INFO L933 BasicCegarLoop]: 2480 mSDtfsCounter, 2737 mSDsluCounter, 5585 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2741 SdHoareTripleChecker+Valid, 7421 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:13:05,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2741 Valid, 7421 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 985 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-11-23 02:13:05,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31125 states. [2021-11-23 02:13:07,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31125 to 31125. [2021-11-23 02:13:07,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31125 states, 17279 states have (on average 1.2351409225070895) internal successors, (21342), 17861 states have internal predecessors, (21342), 11111 states have call successors, (11111), 2769 states have call predecessors, (11111), 2732 states have return successors, (11131), 10846 states have call predecessors, (11131), 11107 states have call successors, (11131) [2021-11-23 02:13:07,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31125 states to 31125 states and 43584 transitions. [2021-11-23 02:13:07,408 INFO L78 Accepts]: Start accepts. Automaton has 31125 states and 43584 transitions. Word has length 252 [2021-11-23 02:13:07,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:13:07,408 INFO L470 AbstractCegarLoop]: Abstraction has 31125 states and 43584 transitions. [2021-11-23 02:13:07,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-23 02:13:07,409 INFO L276 IsEmpty]: Start isEmpty. Operand 31125 states and 43584 transitions. [2021-11-23 02:13:07,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-11-23 02:13:07,414 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:13:07,414 INFO L514 BasicCegarLoop]: trace histogram [20, 15, 15, 15, 15, 15, 15, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:13:07,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 02:13:07,415 INFO L402 AbstractCegarLoop]: === Iteration 15 === 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)] === [2021-11-23 02:13:07,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:13:07,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1263152662, now seen corresponding path program 1 times [2021-11-23 02:13:07,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:13:07,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681539774] [2021-11-23 02:13:07,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:13:07,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:13:07,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:13:07,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1069 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1062 trivial. 0 not checked. [2021-11-23 02:13:07,605 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:13:07,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681539774] [2021-11-23 02:13:07,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681539774] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:13:07,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:13:07,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:13:07,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501271567] [2021-11-23 02:13:07,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:13:07,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:13:07,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:13:07,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:13:07,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:13:07,608 INFO L87 Difference]: Start difference. First operand 31125 states and 43584 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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) [2021-11-23 02:13:13,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:13:13,406 INFO L93 Difference]: Finished difference Result 77378 states and 108375 transitions. [2021-11-23 02:13:13,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:13:13,408 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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 252 [2021-11-23 02:13:13,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:13:13,615 INFO L225 Difference]: With dead ends: 77378 [2021-11-23 02:13:13,615 INFO L226 Difference]: Without dead ends: 46401 [2021-11-23 02:13:13,715 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 [2021-11-23 02:13:13,716 INFO L933 BasicCegarLoop]: 4859 mSDtfsCounter, 2687 mSDsluCounter, 2777 mSDsCounter, 0 mSdLazyCounter, 976 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2687 SdHoareTripleChecker+Valid, 7322 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:13:13,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2687 Valid, 7322 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 976 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-23 02:13:13,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46401 states. [2021-11-23 02:13:16,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46401 to 46320. [2021-11-23 02:13:16,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46320 states, 25684 states have (on average 1.2343482323625603) internal successors, (31703), 26568 states have internal predecessors, (31703), 16559 states have call successors, (16559), 4129 states have call predecessors, (16559), 4074 states have return successors, (16588), 16150 states have call predecessors, (16588), 16555 states have call successors, (16588) [2021-11-23 02:13:16,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46320 states to 46320 states and 64850 transitions. [2021-11-23 02:13:16,469 INFO L78 Accepts]: Start accepts. Automaton has 46320 states and 64850 transitions. Word has length 252 [2021-11-23 02:13:16,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:13:16,470 INFO L470 AbstractCegarLoop]: Abstraction has 46320 states and 64850 transitions. [2021-11-23 02:13:16,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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) [2021-11-23 02:13:16,470 INFO L276 IsEmpty]: Start isEmpty. Operand 46320 states and 64850 transitions. [2021-11-23 02:13:16,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-11-23 02:13:16,475 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:13:16,475 INFO L514 BasicCegarLoop]: trace histogram [19, 15, 15, 15, 15, 15, 15, 9, 8, 8, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:13:16,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 02:13:16,476 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:13:16,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:13:16,476 INFO L85 PathProgramCache]: Analyzing trace with hash -876800614, now seen corresponding path program 1 times [2021-11-23 02:13:16,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:13:16,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839579077] [2021-11-23 02:13:16,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:13:16,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:13:16,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:13:16,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1135 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 1119 trivial. 0 not checked. [2021-11-23 02:13:16,738 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:13:16,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839579077] [2021-11-23 02:13:16,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839579077] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:13:16,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:13:16,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:13:16,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840531642] [2021-11-23 02:13:16,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:13:16,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:13:16,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:13:16,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:13:16,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:13:16,744 INFO L87 Difference]: Start difference. First operand 46320 states and 64850 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (36), 3 states have call predecessors, (36), 1 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-23 02:13:21,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:13:21,529 INFO L93 Difference]: Finished difference Result 46326 states and 64855 transitions. [2021-11-23 02:13:21,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:13:21,530 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (36), 3 states have call predecessors, (36), 1 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) Word has length 257 [2021-11-23 02:13:21,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:13:21,699 INFO L225 Difference]: With dead ends: 46326 [2021-11-23 02:13:21,699 INFO L226 Difference]: Without dead ends: 46324 [2021-11-23 02:13:21,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:13:21,721 INFO L933 BasicCegarLoop]: 2480 mSDtfsCounter, 2737 mSDsluCounter, 5585 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2740 SdHoareTripleChecker+Valid, 7421 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:13:21,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2740 Valid, 7421 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 985 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-23 02:13:21,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46324 states.