./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-amd-pcnet32.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85d3f6bf-524e-481c-961c-9e580782637d/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85d3f6bf-524e-481c-961c-9e580782637d/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85d3f6bf-524e-481c-961c-9e580782637d/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85d3f6bf-524e-481c-961c-9e580782637d/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85d3f6bf-524e-481c-961c-9e580782637d/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85d3f6bf-524e-481c-961c-9e580782637d/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash bf04605b927a140287b1c754ad26365df4778b673325ded7dfdba05deed83fbc --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 22:50:32,659 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 22:50:32,662 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 22:50:32,731 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 22:50:32,732 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 22:50:32,739 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 22:50:32,741 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 22:50:32,747 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 22:50:32,750 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 22:50:32,759 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 22:50:32,761 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 22:50:32,763 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 22:50:32,763 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 22:50:32,766 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 22:50:32,768 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 22:50:32,775 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 22:50:32,777 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 22:50:32,779 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 22:50:32,782 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 22:50:32,791 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 22:50:32,795 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 22:50:32,796 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 22:50:32,800 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 22:50:32,802 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 22:50:32,809 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 22:50:32,809 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 22:50:32,810 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 22:50:32,812 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 22:50:32,813 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 22:50:32,814 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 22:50:32,815 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 22:50:32,816 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 22:50:32,818 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 22:50:32,820 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 22:50:32,821 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 22:50:32,822 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 22:50:32,823 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 22:50:32,823 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 22:50:32,823 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 22:50:32,824 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 22:50:32,825 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 22:50:32,826 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85d3f6bf-524e-481c-961c-9e580782637d/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-20 22:50:32,871 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 22:50:32,872 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 22:50:32,873 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 22:50:32,873 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 22:50:32,874 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 22:50:32,874 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 22:50:32,875 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 22:50:32,875 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 22:50:32,875 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 22:50:32,875 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 22:50:32,877 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 22:50:32,877 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 22:50:32,877 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 22:50:32,878 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 22:50:32,878 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 22:50:32,878 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 22:50:32,878 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 22:50:32,879 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 22:50:32,880 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 22:50:32,880 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 22:50:32,880 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 22:50:32,880 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 22:50:32,881 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 22:50:32,881 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 22:50:32,881 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 22:50:32,881 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 22:50:32,883 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 22:50:32,884 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 22:50:32,884 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 22:50:32,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:50:32,884 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 22:50:32,885 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 22:50:32,885 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 22:50:32,885 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 22:50:32,886 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 22:50:32,886 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 22:50:32,886 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 22:50:32,886 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 22:50:32,887 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_85d3f6bf-524e-481c-961c-9e580782637d/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85d3f6bf-524e-481c-961c-9e580782637d/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bf04605b927a140287b1c754ad26365df4778b673325ded7dfdba05deed83fbc [2021-11-20 22:50:33,298 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 22:50:33,322 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 22:50:33,324 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 22:50:33,326 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 22:50:33,327 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 22:50:33,328 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85d3f6bf-524e-481c-961c-9e580782637d/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i [2021-11-20 22:50:33,413 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85d3f6bf-524e-481c-961c-9e580782637d/bin/utaipan-TEXQjIfE4P/data/fc26e46e4/3033a8d72ae5465ca68015d1fa301b76/FLAG2d1372a2f [2021-11-20 22:50:34,688 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 22:50:34,689 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85d3f6bf-524e-481c-961c-9e580782637d/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i [2021-11-20 22:50:34,766 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85d3f6bf-524e-481c-961c-9e580782637d/bin/utaipan-TEXQjIfE4P/data/fc26e46e4/3033a8d72ae5465ca68015d1fa301b76/FLAG2d1372a2f [2021-11-20 22:50:34,867 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85d3f6bf-524e-481c-961c-9e580782637d/bin/utaipan-TEXQjIfE4P/data/fc26e46e4/3033a8d72ae5465ca68015d1fa301b76 [2021-11-20 22:50:34,869 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 22:50:34,871 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 22:50:34,872 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 22:50:34,873 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 22:50:34,876 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 22:50:34,878 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:50:34" (1/1) ... [2021-11-20 22:50:34,880 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@579bf22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:34, skipping insertion in model container [2021-11-20 22:50:34,881 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:50:34" (1/1) ... [2021-11-20 22:50:34,888 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 22:50:35,080 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 22:50:39,812 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_85d3f6bf-524e-481c-961c-9e580782637d/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[422318,422331] [2021-11-20 22:50:39,816 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_85d3f6bf-524e-481c-961c-9e580782637d/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[422487,422500] [2021-11-20 22:50:39,817 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_85d3f6bf-524e-481c-961c-9e580782637d/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[422654,422667] [2021-11-20 22:50:39,817 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_85d3f6bf-524e-481c-961c-9e580782637d/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[422822,422835] [2021-11-20 22:50:39,852 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:50:39,915 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 22:50:40,496 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_85d3f6bf-524e-481c-961c-9e580782637d/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[422318,422331] [2021-11-20 22:50:40,497 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_85d3f6bf-524e-481c-961c-9e580782637d/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[422487,422500] [2021-11-20 22:50:40,497 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_85d3f6bf-524e-481c-961c-9e580782637d/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[422654,422667] [2021-11-20 22:50:40,498 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_85d3f6bf-524e-481c-961c-9e580782637d/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[422822,422835] [2021-11-20 22:50:40,517 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:50:40,881 INFO L208 MainTranslator]: Completed translation [2021-11-20 22:50:40,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:40 WrapperNode [2021-11-20 22:50:40,882 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 22:50:40,883 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 22:50:40,884 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 22:50:40,884 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 22:50:40,892 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:40" (1/1) ... [2021-11-20 22:50:41,061 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:40" (1/1) ... [2021-11-20 22:50:41,437 INFO L137 Inliner]: procedures = 559, calls = 2867, calls flagged for inlining = 295, calls inlined = 261, statements flattened = 7372 [2021-11-20 22:50:41,439 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 22:50:41,440 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 22:50:41,441 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 22:50:41,442 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 22:50:41,451 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:40" (1/1) ... [2021-11-20 22:50:41,459 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:40" (1/1) ... [2021-11-20 22:50:41,608 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:40" (1/1) ... [2021-11-20 22:50:41,614 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:40" (1/1) ... [2021-11-20 22:50:41,839 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:40" (1/1) ... [2021-11-20 22:50:41,882 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:40" (1/1) ... [2021-11-20 22:50:41,938 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:40" (1/1) ... [2021-11-20 22:50:41,998 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 22:50:41,999 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 22:50:42,000 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 22:50:42,000 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 22:50:42,001 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:40" (1/1) ... [2021-11-20 22:50:42,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:50:42,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85d3f6bf-524e-481c-961c-9e580782637d/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:50:42,040 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85d3f6bf-524e-481c-961c-9e580782637d/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 22:50:42,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85d3f6bf-524e-481c-961c-9e580782637d/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 22:50:42,095 INFO L130 BoogieDeclarations]: Found specification of procedure mdio_write [2021-11-20 22:50:42,095 INFO L138 BoogieDeclarations]: Found implementation of procedure mdio_write [2021-11-20 22:50:42,096 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-20 22:50:42,096 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-20 22:50:42,096 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_alloc_skb [2021-11-20 22:50:42,096 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_alloc_skb [2021-11-20 22:50:42,096 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-20 22:50:42,097 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-20 22:50:42,097 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-20 22:50:42,097 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-20 22:50:42,097 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2021-11-20 22:50:42,097 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2021-11-20 22:50:42,097 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-20 22:50:42,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-20 22:50:42,098 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2021-11-20 22:50:42,098 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2021-11-20 22:50:42,098 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-11-20 22:50:42,098 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-11-20 22:50:42,099 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_63 [2021-11-20 22:50:42,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_63 [2021-11-20 22:50:42,099 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_interrupt [2021-11-20 22:50:42,099 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_interrupt [2021-11-20 22:50:42,099 INFO L130 BoogieDeclarations]: Found specification of procedure pci_name [2021-11-20 22:50:42,100 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_name [2021-11-20 22:50:42,100 INFO L130 BoogieDeclarations]: Found specification of procedure pci_get_drvdata [2021-11-20 22:50:42,100 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_get_drvdata [2021-11-20 22:50:42,101 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-20 22:50:42,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-20 22:50:42,101 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-11-20 22:50:42,101 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-11-20 22:50:42,101 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-20 22:50:42,102 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-20 22:50:42,102 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-20 22:50:42,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-20 22:50:42,103 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_single [2021-11-20 22:50:42,103 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_single [2021-11-20 22:50:42,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 22:50:42,103 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_dwio_write_bcr [2021-11-20 22:50:42,103 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_dwio_write_bcr [2021-11-20 22:50:42,104 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-20 22:50:42,104 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-20 22:50:42,104 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-11-20 22:50:42,104 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-11-20 22:50:42,105 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-20 22:50:42,106 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_EMGentry_exit_pcnet32_cleanup_module_16_2 [2021-11-20 22:50:42,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_EMGentry_exit_pcnet32_cleanup_module_16_2 [2021-11-20 22:50:42,106 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-20 22:50:42,107 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-20 22:50:42,107 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_netdev [2021-11-20 22:50:42,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_netdev [2021-11-20 22:50:42,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-20 22:50:42,107 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-20 22:50:42,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-20 22:50:42,108 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_purge_tx_ring [2021-11-20 22:50:42,108 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_purge_tx_ring [2021-11-20 22:50:42,108 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 22:50:42,109 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2021-11-20 22:50:42,109 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2021-11-20 22:50:42,109 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-20 22:50:42,109 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-20 22:50:42,109 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_wio_write_bcr [2021-11-20 22:50:42,109 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_wio_write_bcr [2021-11-20 22:50:42,110 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_interrupt_context [2021-11-20 22:50:42,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_interrupt_context [2021-11-20 22:50:42,110 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2021-11-20 22:50:42,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2021-11-20 22:50:42,111 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2021-11-20 22:50:42,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2021-11-20 22:50:42,111 INFO L130 BoogieDeclarations]: Found specification of procedure pci_free_consistent [2021-11-20 22:50:42,112 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_free_consistent [2021-11-20 22:50:42,112 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2021-11-20 22:50:42,112 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2021-11-20 22:50:42,112 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_netif_start [2021-11-20 22:50:42,112 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_netif_start [2021-11-20 22:50:42,113 INFO L130 BoogieDeclarations]: Found specification of procedure napi_enable [2021-11-20 22:50:42,113 INFO L138 BoogieDeclarations]: Found implementation of procedure napi_enable [2021-11-20 22:50:42,113 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~~u16~0 [2021-11-20 22:50:42,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~~u16~0 [2021-11-20 22:50:42,114 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-20 22:50:42,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-20 22:50:42,114 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 22:50:42,114 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_1 [2021-11-20 22:50:42,115 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_1 [2021-11-20 22:50:42,116 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_0 [2021-11-20 22:50:42,116 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_0 [2021-11-20 22:50:42,116 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_3 [2021-11-20 22:50:42,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_3 [2021-11-20 22:50:42,117 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_2 [2021-11-20 22:50:42,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_2 [2021-11-20 22:50:42,118 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mod_timer [2021-11-20 22:50:42,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mod_timer [2021-11-20 22:50:42,118 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_open [2021-11-20 22:50:42,118 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_open [2021-11-20 22:50:42,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 22:50:42,118 INFO L130 BoogieDeclarations]: Found specification of procedure is_valid_ether_addr [2021-11-20 22:50:42,119 INFO L138 BoogieDeclarations]: Found implementation of procedure is_valid_ether_addr [2021-11-20 22:50:42,119 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-20 22:50:42,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-20 22:50:42,119 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-20 22:50:42,120 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-20 22:50:42,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 22:50:42,120 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-20 22:50:42,120 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-20 22:50:42,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-20 22:50:42,121 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_wio_reset [2021-11-20 22:50:42,122 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_wio_reset [2021-11-20 22:50:42,125 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_lock_of_pcnet32_private [2021-11-20 22:50:42,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_lock_of_pcnet32_private [2021-11-20 22:50:42,126 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2021-11-20 22:50:42,127 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2021-11-20 22:50:42,127 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_restart [2021-11-20 22:50:42,128 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_restart [2021-11-20 22:50:42,128 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_spin_lock [2021-11-20 22:50:42,128 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_spin_lock [2021-11-20 22:50:42,129 INFO L130 BoogieDeclarations]: Found specification of procedure napi_disable [2021-11-20 22:50:42,134 INFO L138 BoogieDeclarations]: Found implementation of procedure napi_disable [2021-11-20 22:50:42,134 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-20 22:50:42,135 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-20 22:50:42,135 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2021-11-20 22:50:42,135 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2021-11-20 22:50:42,135 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2021-11-20 22:50:42,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2021-11-20 22:50:42,136 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_dwio_read_csr [2021-11-20 22:50:42,136 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_dwio_read_csr [2021-11-20 22:50:42,136 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~TO~VOID [2021-11-20 22:50:42,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~TO~VOID [2021-11-20 22:50:42,136 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-20 22:50:42,137 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-20 22:50:42,137 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_dwio_reset [2021-11-20 22:50:42,137 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_dwio_reset [2021-11-20 22:50:42,137 INFO L130 BoogieDeclarations]: Found specification of procedure mdio_read [2021-11-20 22:50:42,167 INFO L138 BoogieDeclarations]: Found implementation of procedure mdio_read [2021-11-20 22:50:42,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 22:50:42,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 22:50:42,167 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2021-11-20 22:50:42,167 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2021-11-20 22:50:42,167 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-20 22:50:42,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-20 22:50:42,168 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-20 22:50:42,168 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-20 22:50:42,168 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_pm_resume [2021-11-20 22:50:42,168 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_pm_resume [2021-11-20 22:50:42,168 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-20 22:50:42,168 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-20 22:50:42,168 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_check_media [2021-11-20 22:50:42,169 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_check_media [2021-11-20 22:50:42,169 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_get_regs_len [2021-11-20 22:50:42,169 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_get_regs_len [2021-11-20 22:50:42,169 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_size_call_parameter [2021-11-20 22:50:42,169 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_process_context [2021-11-20 22:50:42,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_process_context [2021-11-20 22:50:42,169 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_poll_controller [2021-11-20 22:50:42,169 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_poll_controller [2021-11-20 22:50:42,170 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_free_ring [2021-11-20 22:50:42,170 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_free_ring [2021-11-20 22:50:42,170 INFO L130 BoogieDeclarations]: Found specification of procedure pci_map_single [2021-11-20 22:50:42,170 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_map_single [2021-11-20 22:50:42,170 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-20 22:50:42,170 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-20 22:50:42,170 INFO L130 BoogieDeclarations]: Found specification of procedure kcalloc [2021-11-20 22:50:42,170 INFO L138 BoogieDeclarations]: Found implementation of procedure kcalloc [2021-11-20 22:50:42,171 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-20 22:50:42,171 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-20 22:50:42,171 INFO L130 BoogieDeclarations]: Found specification of procedure pci_alloc_consistent [2021-11-20 22:50:42,171 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_alloc_consistent [2021-11-20 22:50:42,171 INFO L130 BoogieDeclarations]: Found specification of procedure mii_ethtool_gset [2021-11-20 22:50:42,171 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_ethtool_gset [2021-11-20 22:50:42,171 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_purge_rx_ring [2021-11-20 22:50:42,171 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_purge_rx_ring [2021-11-20 22:50:42,172 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_dwio_write_csr [2021-11-20 22:50:42,172 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_dwio_write_csr [2021-11-20 22:50:42,172 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_tx_timeout [2021-11-20 22:50:42,172 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_tx_timeout [2021-11-20 22:50:42,172 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2021-11-20 22:50:42,172 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2021-11-20 22:50:42,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 22:50:42,174 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_netif_stop [2021-11-20 22:50:42,174 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_netif_stop [2021-11-20 22:50:42,174 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-11-20 22:50:42,174 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-11-20 22:50:42,174 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 22:50:42,175 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_lock_of_pcnet32_private [2021-11-20 22:50:42,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_lock_of_pcnet32_private [2021-11-20 22:50:42,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 22:50:42,175 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_wio_read_csr [2021-11-20 22:50:42,175 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_wio_read_csr [2021-11-20 22:50:42,176 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_set_multicast_list [2021-11-20 22:50:42,176 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_set_multicast_list [2021-11-20 22:50:42,176 INFO L130 BoogieDeclarations]: Found specification of procedure outw [2021-11-20 22:50:42,176 INFO L138 BoogieDeclarations]: Found implementation of procedure outw [2021-11-20 22:50:42,176 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-20 22:50:42,177 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-20 22:50:42,177 INFO L130 BoogieDeclarations]: Found specification of procedure mii_link_ok [2021-11-20 22:50:42,177 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_link_ok [2021-11-20 22:50:42,177 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-20 22:50:42,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-20 22:50:42,178 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_probe1 [2021-11-20 22:50:42,178 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_probe1 [2021-11-20 22:50:42,178 INFO L130 BoogieDeclarations]: Found specification of procedure outl [2021-11-20 22:50:42,178 INFO L138 BoogieDeclarations]: Found implementation of procedure outl [2021-11-20 22:50:42,178 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_irq [2021-11-20 22:50:42,179 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_irq [2021-11-20 22:50:42,179 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_remove_one [2021-11-20 22:50:42,179 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_remove_one [2021-11-20 22:50:42,179 INFO L130 BoogieDeclarations]: Found specification of procedure mii_ethtool_sset [2021-11-20 22:50:42,179 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_ethtool_sset [2021-11-20 22:50:42,179 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~X~~u16~0~TO~VOID [2021-11-20 22:50:42,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~X~~u16~0~TO~VOID [2021-11-20 22:50:42,180 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_dwio_read_bcr [2021-11-20 22:50:42,180 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_dwio_read_bcr [2021-11-20 22:50:42,180 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reserve [2021-11-20 22:50:42,180 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reserve [2021-11-20 22:50:42,181 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-11-20 22:50:42,181 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-11-20 22:50:42,181 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-20 22:50:42,181 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-20 22:50:42,181 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_wio_read_bcr [2021-11-20 22:50:42,182 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_wio_read_bcr [2021-11-20 22:50:42,182 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-20 22:50:42,182 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-20 22:50:42,182 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_init_ring [2021-11-20 22:50:42,182 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_init_ring [2021-11-20 22:50:42,183 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_close [2021-11-20 22:50:42,183 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_close [2021-11-20 22:50:42,183 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2021-11-20 22:50:42,183 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2021-11-20 22:50:42,183 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-20 22:50:42,184 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-20 22:50:42,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 22:50:42,184 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_suspend [2021-11-20 22:50:42,184 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_suspend [2021-11-20 22:50:42,184 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-20 22:50:42,186 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-20 22:50:42,190 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2021-11-20 22:50:42,190 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2021-11-20 22:50:42,190 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_any [2021-11-20 22:50:42,190 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_any [2021-11-20 22:50:42,190 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_wio_write_csr [2021-11-20 22:50:42,191 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_wio_write_csr [2021-11-20 22:50:42,191 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_load_multicast [2021-11-20 22:50:42,191 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_load_multicast [2021-11-20 22:50:42,191 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_stop_queue [2021-11-20 22:50:42,191 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_stop_queue [2021-11-20 22:50:42,191 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_nway_reset [2021-11-20 22:50:42,191 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_nway_reset [2021-11-20 22:50:42,191 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-20 22:50:42,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-20 22:50:42,192 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_power_state [2021-11-20 22:50:42,192 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_power_state [2021-11-20 22:50:42,192 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-11-20 22:50:42,192 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-11-20 22:50:42,192 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2021-11-20 22:50:42,192 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2021-11-20 22:50:42,192 INFO L130 BoogieDeclarations]: Found specification of procedure inl [2021-11-20 22:50:42,192 INFO L138 BoogieDeclarations]: Found implementation of procedure inl [2021-11-20 22:50:42,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 22:50:42,193 INFO L130 BoogieDeclarations]: Found specification of procedure __request_region [2021-11-20 22:50:42,193 INFO L138 BoogieDeclarations]: Found implementation of procedure __request_region [2021-11-20 22:50:42,193 INFO L130 BoogieDeclarations]: Found specification of procedure inw [2021-11-20 22:50:42,193 INFO L138 BoogieDeclarations]: Found implementation of procedure inw [2021-11-20 22:50:42,193 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-20 22:50:42,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-20 22:50:42,193 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_netdev [2021-11-20 22:50:42,193 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_netdev [2021-11-20 22:50:43,521 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 22:50:43,527 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 22:50:43,814 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-20 22:50:51,855 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-20 22:50:52,007 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 22:50:54,487 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 22:50:54,487 INFO L301 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-20 22:50:54,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:50:54 BoogieIcfgContainer [2021-11-20 22:50:54,495 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 22:50:54,497 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 22:50:54,497 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 22:50:54,501 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 22:50:54,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:50:34" (1/3) ... [2021-11-20 22:50:54,502 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3acbed5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:50:54, skipping insertion in model container [2021-11-20 22:50:54,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:40" (2/3) ... [2021-11-20 22:50:54,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3acbed5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:50:54, skipping insertion in model container [2021-11-20 22:50:54,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:50:54" (3/3) ... [2021-11-20 22:50:54,506 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i [2021-11-20 22:50:54,513 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 22:50:54,513 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-20 22:50:54,592 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 22:50:54,610 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 22:50:54,610 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-20 22:50:54,690 INFO L276 IsEmpty]: Start isEmpty. Operand has 1996 states, 1181 states have (on average 1.3158340389500423) internal successors, (1554), 1223 states have internal predecessors, (1554), 692 states have call successors, (692), 123 states have call predecessors, (692), 122 states have return successors, (684), 671 states have call predecessors, (684), 684 states have call successors, (684) [2021-11-20 22:50:54,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-20 22:50:54,722 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:54,723 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:50:54,724 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 22:50:54,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:54,731 INFO L85 PathProgramCache]: Analyzing trace with hash 508439112, now seen corresponding path program 1 times [2021-11-20 22:50:54,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:50:54,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711922798] [2021-11-20 22:50:54,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:54,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:50:55,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:55,650 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2021-11-20 22:50:55,655 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:50:55,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711922798] [2021-11-20 22:50:55,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711922798] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:55,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:50:55,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 22:50:55,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759056188] [2021-11-20 22:50:55,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:55,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:50:55,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:50:55,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:50:55,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:50:55,721 INFO L87 Difference]: Start difference. First operand has 1996 states, 1181 states have (on average 1.3158340389500423) internal successors, (1554), 1223 states have internal predecessors, (1554), 692 states have call successors, (692), 123 states have call predecessors, (692), 122 states have return successors, (684), 671 states have call predecessors, (684), 684 states have call successors, (684) Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-20 22:50:59,921 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:51:00,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:00,433 INFO L93 Difference]: Finished difference Result 5715 states and 8555 transitions. [2021-11-20 22:51:00,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:51:00,437 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 151 [2021-11-20 22:51:00,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:00,498 INFO L225 Difference]: With dead ends: 5715 [2021-11-20 22:51:00,498 INFO L226 Difference]: Without dead ends: 3734 [2021-11-20 22:51:00,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:51:00,529 INFO L933 BasicCegarLoop]: 3116 mSDtfsCounter, 2617 mSDsluCounter, 2835 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2619 SdHoareTripleChecker+Valid, 5557 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:00,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2619 Valid, 5557 Invalid, 836 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [7 Valid, 828 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2021-11-20 22:51:00,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3734 states. [2021-11-20 22:51:00,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3734 to 3730. [2021-11-20 22:51:00,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3730 states, 2220 states have (on average 1.3117117117117116) internal successors, (2912), 2295 states have internal predecessors, (2912), 1269 states have call successors, (1269), 239 states have call predecessors, (1269), 238 states have return successors, (1267), 1241 states have call predecessors, (1267), 1265 states have call successors, (1267) [2021-11-20 22:51:00,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3730 states to 3730 states and 5448 transitions. [2021-11-20 22:51:00,951 INFO L78 Accepts]: Start accepts. Automaton has 3730 states and 5448 transitions. Word has length 151 [2021-11-20 22:51:00,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:00,957 INFO L470 AbstractCegarLoop]: Abstraction has 3730 states and 5448 transitions. [2021-11-20 22:51:00,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-20 22:51:00,959 INFO L276 IsEmpty]: Start isEmpty. Operand 3730 states and 5448 transitions. [2021-11-20 22:51:00,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-20 22:51:00,973 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:00,973 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:51:00,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 22:51:00,974 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 22:51:00,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:00,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1719991937, now seen corresponding path program 1 times [2021-11-20 22:51:00,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:00,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18939967] [2021-11-20 22:51:00,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:00,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:01,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:01,281 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2021-11-20 22:51:01,282 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:51:01,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18939967] [2021-11-20 22:51:01,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18939967] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:01,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:51:01,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 22:51:01,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384303260] [2021-11-20 22:51:01,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:01,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:51:01,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:51:01,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:51:01,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:51:01,288 INFO L87 Difference]: Start difference. First operand 3730 states and 5448 transitions. 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, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-20 22:51:04,185 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:51:06,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:06,350 INFO L93 Difference]: Finished difference Result 10027 states and 14534 transitions. [2021-11-20 22:51:06,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:51:06,351 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, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 153 [2021-11-20 22:51:06,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:06,414 INFO L225 Difference]: With dead ends: 10027 [2021-11-20 22:51:06,415 INFO L226 Difference]: Without dead ends: 6324 [2021-11-20 22:51:06,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:51:06,444 INFO L933 BasicCegarLoop]: 2967 mSDtfsCounter, 1937 mSDsluCounter, 2771 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1937 SdHoareTripleChecker+Valid, 5374 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:06,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1937 Valid, 5374 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 863 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2021-11-20 22:51:06,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6324 states. [2021-11-20 22:51:06,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6324 to 6296. [2021-11-20 22:51:06,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6296 states, 3737 states have (on average 1.302113995183302) internal successors, (4866), 3860 states have internal predecessors, (4866), 2102 states have call successors, (2102), 457 states have call predecessors, (2102), 454 states have return successors, (2111), 2045 states have call predecessors, (2111), 2098 states have call successors, (2111) [2021-11-20 22:51:06,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6296 states to 6296 states and 9079 transitions. [2021-11-20 22:51:06,935 INFO L78 Accepts]: Start accepts. Automaton has 6296 states and 9079 transitions. Word has length 153 [2021-11-20 22:51:06,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:06,938 INFO L470 AbstractCegarLoop]: Abstraction has 6296 states and 9079 transitions. [2021-11-20 22:51:06,938 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, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-20 22:51:06,938 INFO L276 IsEmpty]: Start isEmpty. Operand 6296 states and 9079 transitions. [2021-11-20 22:51:06,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-20 22:51:06,943 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:06,943 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:51:06,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 22:51:06,944 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 22:51:06,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:06,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1116395931, now seen corresponding path program 1 times [2021-11-20 22:51:06,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:06,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473162303] [2021-11-20 22:51:06,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:06,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:07,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:07,239 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2021-11-20 22:51:07,239 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:51:07,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473162303] [2021-11-20 22:51:07,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473162303] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:07,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:51:07,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 22:51:07,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737298729] [2021-11-20 22:51:07,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:07,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:51:07,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:51:07,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:51:07,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:51:07,249 INFO L87 Difference]: Start difference. First operand 6296 states and 9079 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-20 22:51:10,710 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:51:12,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:12,421 INFO L93 Difference]: Finished difference Result 18568 states and 26830 transitions. [2021-11-20 22:51:12,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:51:12,422 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 155 [2021-11-20 22:51:12,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:12,571 INFO L225 Difference]: With dead ends: 18568 [2021-11-20 22:51:12,571 INFO L226 Difference]: Without dead ends: 12299 [2021-11-20 22:51:12,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:51:12,635 INFO L933 BasicCegarLoop]: 3736 mSDtfsCounter, 2744 mSDsluCounter, 2820 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2744 SdHoareTripleChecker+Valid, 6160 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:12,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2744 Valid, 6160 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 952 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2021-11-20 22:51:12,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12299 states. [2021-11-20 22:51:13,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12299 to 12265. [2021-11-20 22:51:13,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12265 states, 7307 states have (on average 1.3046393868892843) internal successors, (9533), 7564 states have internal predecessors, (9533), 4064 states have call successors, (4064), 906 states have call predecessors, (4064), 891 states have return successors, (4139), 3924 states have call predecessors, (4139), 4060 states have call successors, (4139) [2021-11-20 22:51:13,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12265 states to 12265 states and 17736 transitions. [2021-11-20 22:51:13,694 INFO L78 Accepts]: Start accepts. Automaton has 12265 states and 17736 transitions. Word has length 155 [2021-11-20 22:51:13,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:13,696 INFO L470 AbstractCegarLoop]: Abstraction has 12265 states and 17736 transitions. [2021-11-20 22:51:13,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-20 22:51:13,698 INFO L276 IsEmpty]: Start isEmpty. Operand 12265 states and 17736 transitions. [2021-11-20 22:51:13,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-20 22:51:13,702 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:13,702 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:51:13,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 22:51:13,702 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)] === [2021-11-20 22:51:13,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:13,703 INFO L85 PathProgramCache]: Analyzing trace with hash 359729318, now seen corresponding path program 1 times [2021-11-20 22:51:13,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:13,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246637414] [2021-11-20 22:51:13,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:13,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:13,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:13,923 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2021-11-20 22:51:13,924 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:51:13,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246637414] [2021-11-20 22:51:13,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246637414] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:13,924 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:51:13,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 22:51:13,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579127156] [2021-11-20 22:51:13,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:13,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:51:13,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:51:13,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:51:13,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:51:13,927 INFO L87 Difference]: Start difference. First operand 12265 states and 17736 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-20 22:51:17,039 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:51:19,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:19,448 INFO L93 Difference]: Finished difference Result 24448 states and 35141 transitions. [2021-11-20 22:51:19,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:51:19,450 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 156 [2021-11-20 22:51:19,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:19,562 INFO L225 Difference]: With dead ends: 24448 [2021-11-20 22:51:19,562 INFO L226 Difference]: Without dead ends: 12210 [2021-11-20 22:51:19,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:51:19,646 INFO L933 BasicCegarLoop]: 3911 mSDtfsCounter, 2129 mSDsluCounter, 2838 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 17 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2130 SdHoareTripleChecker+Valid, 6357 SdHoareTripleChecker+Invalid, 1107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:19,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2130 Valid, 6357 Invalid, 1107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1089 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2021-11-20 22:51:19,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12210 states. [2021-11-20 22:51:20,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12210 to 12176. [2021-11-20 22:51:20,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12176 states, 7205 states have (on average 1.303678001387925) internal successors, (9393), 7470 states have internal predecessors, (9393), 3932 states have call successors, (3932), 1051 states have call predecessors, (3932), 1036 states have return successors, (4002), 3769 states have call predecessors, (4002), 3928 states have call successors, (4002) [2021-11-20 22:51:20,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12176 states to 12176 states and 17327 transitions. [2021-11-20 22:51:20,533 INFO L78 Accepts]: Start accepts. Automaton has 12176 states and 17327 transitions. Word has length 156 [2021-11-20 22:51:20,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:20,534 INFO L470 AbstractCegarLoop]: Abstraction has 12176 states and 17327 transitions. [2021-11-20 22:51:20,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-20 22:51:20,535 INFO L276 IsEmpty]: Start isEmpty. Operand 12176 states and 17327 transitions. [2021-11-20 22:51:20,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-20 22:51:20,543 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:20,544 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 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] [2021-11-20 22:51:20,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 22:51:20,545 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 22:51:20,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:20,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1449197250, now seen corresponding path program 1 times [2021-11-20 22:51:20,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:20,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515642460] [2021-11-20 22:51:20,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:20,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:20,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:20,954 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 767 trivial. 0 not checked. [2021-11-20 22:51:20,955 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:51:20,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515642460] [2021-11-20 22:51:20,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515642460] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:20,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:51:20,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 22:51:20,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82539411] [2021-11-20 22:51:20,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:20,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 22:51:20,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:51:20,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 22:51:20,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:51:20,958 INFO L87 Difference]: Start difference. First operand 12176 states and 17327 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, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-20 22:51:24,125 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:51:26,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:26,510 INFO L93 Difference]: Finished difference Result 12908 states and 18218 transitions. [2021-11-20 22:51:26,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:51:26,512 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, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 195 [2021-11-20 22:51:26,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:26,593 INFO L225 Difference]: With dead ends: 12908 [2021-11-20 22:51:26,593 INFO L226 Difference]: Without dead ends: 12906 [2021-11-20 22:51:26,601 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 [2021-11-20 22:51:26,604 INFO L933 BasicCegarLoop]: 2678 mSDtfsCounter, 2676 mSDsluCounter, 7021 mSDsCounter, 0 mSdLazyCounter, 1376 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2690 SdHoareTripleChecker+Valid, 8757 SdHoareTripleChecker+Invalid, 1379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1376 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:26,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2690 Valid, 8757 Invalid, 1379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1376 Invalid, 1 Unknown, 0 Unchecked, 4.9s Time] [2021-11-20 22:51:26,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12906 states. [2021-11-20 22:51:27,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12906 to 12902. [2021-11-20 22:51:27,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12902 states, 7605 states have (on average 1.2973044049967126) internal successors, (9866), 7892 states have internal predecessors, (9866), 4138 states have call successors, (4138), 1168 states have call predecessors, (4138), 1156 states have return successors, (4210), 3967 states have call predecessors, (4210), 4134 states have call successors, (4210) [2021-11-20 22:51:27,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12902 states to 12902 states and 18214 transitions. [2021-11-20 22:51:27,533 INFO L78 Accepts]: Start accepts. Automaton has 12902 states and 18214 transitions. Word has length 195 [2021-11-20 22:51:27,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:27,535 INFO L470 AbstractCegarLoop]: Abstraction has 12902 states and 18214 transitions. [2021-11-20 22:51:27,535 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, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-20 22:51:27,536 INFO L276 IsEmpty]: Start isEmpty. Operand 12902 states and 18214 transitions. [2021-11-20 22:51:27,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-20 22:51:27,647 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:27,647 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:51:27,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 22:51:27,647 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 22:51:27,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:27,648 INFO L85 PathProgramCache]: Analyzing trace with hash -786789772, now seen corresponding path program 1 times [2021-11-20 22:51:27,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:27,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062958957] [2021-11-20 22:51:27,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:27,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:27,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:27,963 INFO L134 CoverageAnalysis]: Checked inductivity of 764 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 762 trivial. 0 not checked. [2021-11-20 22:51:27,964 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:51:27,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062958957] [2021-11-20 22:51:27,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062958957] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:27,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:51:27,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 22:51:27,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5089234] [2021-11-20 22:51:27,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:27,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 22:51:27,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:51:27,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 22:51:27,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:51:27,967 INFO L87 Difference]: Start difference. First operand 12902 states and 18214 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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) [2021-11-20 22:51:31,119 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:51:33,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:33,338 INFO L93 Difference]: Finished difference Result 12930 states and 18233 transitions. [2021-11-20 22:51:33,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:51:33,339 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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 201 [2021-11-20 22:51:33,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:33,419 INFO L225 Difference]: With dead ends: 12930 [2021-11-20 22:51:33,419 INFO L226 Difference]: Without dead ends: 12928 [2021-11-20 22:51:33,430 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 [2021-11-20 22:51:33,431 INFO L933 BasicCegarLoop]: 2677 mSDtfsCounter, 2682 mSDsluCounter, 6985 mSDsCounter, 0 mSdLazyCounter, 1372 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2695 SdHoareTripleChecker+Valid, 8723 SdHoareTripleChecker+Invalid, 1374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1372 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:33,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2695 Valid, 8723 Invalid, 1374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1372 Invalid, 1 Unknown, 0 Unchecked, 4.9s Time] [2021-11-20 22:51:33,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12928 states. [2021-11-20 22:51:34,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12928 to 12924. [2021-11-20 22:51:34,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12924 states, 7619 states have (on average 1.2968893555584722) internal successors, (9881), 7906 states have internal predecessors, (9881), 4138 states have call successors, (4138), 1176 states have call predecessors, (4138), 1164 states have return successors, (4210), 3967 states have call predecessors, (4210), 4134 states have call successors, (4210) [2021-11-20 22:51:34,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12924 states to 12924 states and 18229 transitions. [2021-11-20 22:51:34,391 INFO L78 Accepts]: Start accepts. Automaton has 12924 states and 18229 transitions. Word has length 201 [2021-11-20 22:51:34,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:34,392 INFO L470 AbstractCegarLoop]: Abstraction has 12924 states and 18229 transitions. [2021-11-20 22:51:34,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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) [2021-11-20 22:51:34,392 INFO L276 IsEmpty]: Start isEmpty. Operand 12924 states and 18229 transitions. [2021-11-20 22:51:34,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-11-20 22:51:34,399 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:34,400 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:51:34,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 22:51:34,401 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)] === [2021-11-20 22:51:34,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:34,401 INFO L85 PathProgramCache]: Analyzing trace with hash 897615034, now seen corresponding path program 1 times [2021-11-20 22:51:34,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:34,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161474909] [2021-11-20 22:51:34,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:34,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:34,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:34,799 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 767 trivial. 0 not checked. [2021-11-20 22:51:34,799 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:51:34,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161474909] [2021-11-20 22:51:34,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161474909] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:34,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:51:34,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 22:51:34,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814541876] [2021-11-20 22:51:34,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:34,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 22:51:34,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:51:34,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 22:51:34,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:51:34,803 INFO L87 Difference]: Start difference. First operand 12924 states and 18229 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-20 22:51:37,965 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:51:40,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:40,057 INFO L93 Difference]: Finished difference Result 12934 states and 18236 transitions. [2021-11-20 22:51:40,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:51:40,058 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 207 [2021-11-20 22:51:40,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:40,132 INFO L225 Difference]: With dead ends: 12934 [2021-11-20 22:51:40,132 INFO L226 Difference]: Without dead ends: 12932 [2021-11-20 22:51:40,143 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 [2021-11-20 22:51:40,144 INFO L933 BasicCegarLoop]: 2677 mSDtfsCounter, 2682 mSDsluCounter, 6985 mSDsCounter, 0 mSdLazyCounter, 1372 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2694 SdHoareTripleChecker+Valid, 8723 SdHoareTripleChecker+Invalid, 1374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1372 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:40,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2694 Valid, 8723 Invalid, 1374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1372 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2021-11-20 22:51:40,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12932 states. [2021-11-20 22:51:41,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12932 to 12928. [2021-11-20 22:51:41,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12928 states, 7622 states have (on average 1.2967725006559958) internal successors, (9884), 7909 states have internal predecessors, (9884), 4138 states have call successors, (4138), 1177 states have call predecessors, (4138), 1165 states have return successors, (4210), 3967 states have call predecessors, (4210), 4134 states have call successors, (4210) [2021-11-20 22:51:41,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12928 states to 12928 states and 18232 transitions. [2021-11-20 22:51:41,153 INFO L78 Accepts]: Start accepts. Automaton has 12928 states and 18232 transitions. Word has length 207 [2021-11-20 22:51:41,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:41,154 INFO L470 AbstractCegarLoop]: Abstraction has 12928 states and 18232 transitions. [2021-11-20 22:51:41,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-20 22:51:41,154 INFO L276 IsEmpty]: Start isEmpty. Operand 12928 states and 18232 transitions. [2021-11-20 22:51:41,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-11-20 22:51:41,164 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:41,165 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 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] [2021-11-20 22:51:41,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 22:51:41,166 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 22:51:41,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:41,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1947622207, now seen corresponding path program 1 times [2021-11-20 22:51:41,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:41,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134992946] [2021-11-20 22:51:41,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:41,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:41,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:41,406 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 758 trivial. 0 not checked. [2021-11-20 22:51:41,407 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:51:41,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134992946] [2021-11-20 22:51:41,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134992946] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:41,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:51:41,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 22:51:41,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68155549] [2021-11-20 22:51:41,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:41,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:51:41,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:51:41,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:51:41,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:51:41,410 INFO L87 Difference]: Start difference. First operand 12928 states and 18232 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-20 22:51:44,447 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:51:46,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:46,433 INFO L93 Difference]: Finished difference Result 30353 states and 42788 transitions. [2021-11-20 22:51:46,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:51:46,434 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 205 [2021-11-20 22:51:46,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:46,656 INFO L225 Difference]: With dead ends: 30353 [2021-11-20 22:51:46,657 INFO L226 Difference]: Without dead ends: 17655 [2021-11-20 22:51:46,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:51:46,701 INFO L933 BasicCegarLoop]: 3675 mSDtfsCounter, 2126 mSDsluCounter, 2832 mSDsCounter, 0 mSdLazyCounter, 1032 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2127 SdHoareTripleChecker+Valid, 6115 SdHoareTripleChecker+Invalid, 1048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1032 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:46,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2127 Valid, 6115 Invalid, 1048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1032 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2021-11-20 22:51:46,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17655 states. [2021-11-20 22:51:47,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17655 to 17609. [2021-11-20 22:51:47,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17609 states, 10381 states have (on average 1.298429823716405) internal successors, (13479), 10782 states have internal predecessors, (13479), 5606 states have call successors, (5606), 1638 states have call predecessors, (5606), 1619 states have return successors, (5706), 5365 states have call predecessors, (5706), 5602 states have call successors, (5706) [2021-11-20 22:51:47,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17609 states to 17609 states and 24791 transitions. [2021-11-20 22:51:47,806 INFO L78 Accepts]: Start accepts. Automaton has 17609 states and 24791 transitions. Word has length 205 [2021-11-20 22:51:47,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:47,808 INFO L470 AbstractCegarLoop]: Abstraction has 17609 states and 24791 transitions. [2021-11-20 22:51:47,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-20 22:51:47,809 INFO L276 IsEmpty]: Start isEmpty. Operand 17609 states and 24791 transitions. [2021-11-20 22:51:47,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-20 22:51:47,818 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:47,818 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:51:47,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 22:51:47,819 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 22:51:47,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:47,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1465462489, now seen corresponding path program 1 times [2021-11-20 22:51:47,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:47,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002753797] [2021-11-20 22:51:47,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:47,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:47,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:48,145 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 779 trivial. 0 not checked. [2021-11-20 22:51:48,146 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:51:48,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002753797] [2021-11-20 22:51:48,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002753797] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:48,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:51:48,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 22:51:48,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215527451] [2021-11-20 22:51:48,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:48,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 22:51:48,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:51:48,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 22:51:48,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:51:48,150 INFO L87 Difference]: Start difference. First operand 17609 states and 24791 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, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-20 22:51:50,949 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:51:53,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:53,016 INFO L93 Difference]: Finished difference Result 17619 states and 24798 transitions. [2021-11-20 22:51:53,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:51:53,018 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, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 210 [2021-11-20 22:51:53,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:53,128 INFO L225 Difference]: With dead ends: 17619 [2021-11-20 22:51:53,128 INFO L226 Difference]: Without dead ends: 17617 [2021-11-20 22:51:53,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:51:53,142 INFO L933 BasicCegarLoop]: 2677 mSDtfsCounter, 2683 mSDsluCounter, 6987 mSDsCounter, 0 mSdLazyCounter, 1375 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2694 SdHoareTripleChecker+Valid, 8723 SdHoareTripleChecker+Invalid, 1377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1375 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:53,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2694 Valid, 8723 Invalid, 1377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1375 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2021-11-20 22:51:53,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17617 states. [2021-11-20 22:51:54,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17617 to 17613. [2021-11-20 22:51:54,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17613 states, 10384 states have (on average 1.2983436055469955) internal successors, (13482), 10785 states have internal predecessors, (13482), 5606 states have call successors, (5606), 1639 states have call predecessors, (5606), 1620 states have return successors, (5706), 5365 states have call predecessors, (5706), 5602 states have call successors, (5706) [2021-11-20 22:51:54,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17613 states to 17613 states and 24794 transitions. [2021-11-20 22:51:54,450 INFO L78 Accepts]: Start accepts. Automaton has 17613 states and 24794 transitions. Word has length 210 [2021-11-20 22:51:54,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:54,451 INFO L470 AbstractCegarLoop]: Abstraction has 17613 states and 24794 transitions. [2021-11-20 22:51:54,451 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, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-20 22:51:54,451 INFO L276 IsEmpty]: Start isEmpty. Operand 17613 states and 24794 transitions. [2021-11-20 22:51:54,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-11-20 22:51:54,463 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:54,463 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:51:54,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 22:51:54,464 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 22:51:54,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:54,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1761096945, now seen corresponding path program 1 times [2021-11-20 22:51:54,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:54,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230511839] [2021-11-20 22:51:54,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:54,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:54,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:54,799 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2021-11-20 22:51:54,800 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:51:54,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230511839] [2021-11-20 22:51:54,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230511839] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:54,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:51:54,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 22:51:54,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863752408] [2021-11-20 22:51:54,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:54,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 22:51:54,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:51:54,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 22:51:54,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:51:54,804 INFO L87 Difference]: Start difference. First operand 17613 states and 24794 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-20 22:51:57,728 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:51:59,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:59,953 INFO L93 Difference]: Finished difference Result 17623 states and 24801 transitions. [2021-11-20 22:51:59,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:51:59,954 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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 216 [2021-11-20 22:51:59,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:52:00,053 INFO L225 Difference]: With dead ends: 17623 [2021-11-20 22:52:00,054 INFO L226 Difference]: Without dead ends: 17621 [2021-11-20 22:52:00,064 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 [2021-11-20 22:52:00,065 INFO L933 BasicCegarLoop]: 2677 mSDtfsCounter, 2682 mSDsluCounter, 6985 mSDsCounter, 0 mSdLazyCounter, 1372 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2692 SdHoareTripleChecker+Valid, 8723 SdHoareTripleChecker+Invalid, 1374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1372 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-20 22:52:00,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2692 Valid, 8723 Invalid, 1374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1372 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2021-11-20 22:52:00,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17621 states. [2021-11-20 22:52:01,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17621 to 17617. [2021-11-20 22:52:01,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17617 states, 10387 states have (on average 1.2982574371810918) internal successors, (13485), 10788 states have internal predecessors, (13485), 5606 states have call successors, (5606), 1640 states have call predecessors, (5606), 1621 states have return successors, (5706), 5365 states have call predecessors, (5706), 5602 states have call successors, (5706) [2021-11-20 22:52:01,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17617 states to 17617 states and 24797 transitions. [2021-11-20 22:52:01,307 INFO L78 Accepts]: Start accepts. Automaton has 17617 states and 24797 transitions. Word has length 216 [2021-11-20 22:52:01,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:52:01,311 INFO L470 AbstractCegarLoop]: Abstraction has 17617 states and 24797 transitions. [2021-11-20 22:52:01,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-20 22:52:01,311 INFO L276 IsEmpty]: Start isEmpty. Operand 17617 states and 24797 transitions. [2021-11-20 22:52:01,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-11-20 22:52:01,324 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:52:01,324 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 6, 5, 5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:52:01,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 22:52:01,325 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 22:52:01,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:52:01,326 INFO L85 PathProgramCache]: Analyzing trace with hash 219649588, now seen corresponding path program 1 times [2021-11-20 22:52:01,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:52:01,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607044922] [2021-11-20 22:52:01,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:01,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:52:01,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:01,643 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 802 trivial. 0 not checked. [2021-11-20 22:52:01,644 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:52:01,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607044922] [2021-11-20 22:52:01,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607044922] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:52:01,644 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:52:01,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 22:52:01,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795791900] [2021-11-20 22:52:01,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:52:01,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 22:52:01,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:52:01,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 22:52:01,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:52:01,647 INFO L87 Difference]: Start difference. First operand 17617 states and 24797 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-20 22:52:04,572 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:52:06,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:52:06,829 INFO L93 Difference]: Finished difference Result 17627 states and 24804 transitions. [2021-11-20 22:52:06,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:52:06,830 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 221 [2021-11-20 22:52:06,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:52:06,916 INFO L225 Difference]: With dead ends: 17627 [2021-11-20 22:52:06,917 INFO L226 Difference]: Without dead ends: 17625 [2021-11-20 22:52:06,930 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 [2021-11-20 22:52:06,931 INFO L933 BasicCegarLoop]: 2677 mSDtfsCounter, 2682 mSDsluCounter, 6987 mSDsCounter, 0 mSdLazyCounter, 1375 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2691 SdHoareTripleChecker+Valid, 8723 SdHoareTripleChecker+Invalid, 1377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1375 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-20 22:52:06,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2691 Valid, 8723 Invalid, 1377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1375 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2021-11-20 22:52:06,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17625 states. [2021-11-20 22:52:08,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17625 to 17621. [2021-11-20 22:52:08,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17621 states, 10390 states have (on average 1.2981713185755535) internal successors, (13488), 10791 states have internal predecessors, (13488), 5606 states have call successors, (5606), 1641 states have call predecessors, (5606), 1622 states have return successors, (5706), 5365 states have call predecessors, (5706), 5602 states have call successors, (5706) [2021-11-20 22:52:08,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17621 states to 17621 states and 24800 transitions. [2021-11-20 22:52:08,165 INFO L78 Accepts]: Start accepts. Automaton has 17621 states and 24800 transitions. Word has length 221 [2021-11-20 22:52:08,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:52:08,166 INFO L470 AbstractCegarLoop]: Abstraction has 17621 states and 24800 transitions. [2021-11-20 22:52:08,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-20 22:52:08,167 INFO L276 IsEmpty]: Start isEmpty. Operand 17621 states and 24800 transitions. [2021-11-20 22:52:08,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-11-20 22:52:08,177 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:52:08,177 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 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] [2021-11-20 22:52:08,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 22:52:08,178 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 22:52:08,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:52:08,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1259613858, now seen corresponding path program 1 times [2021-11-20 22:52:08,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:52:08,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973207786] [2021-11-20 22:52:08,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:08,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:52:08,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:08,508 INFO L134 CoverageAnalysis]: Checked inductivity of 839 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 827 trivial. 0 not checked. [2021-11-20 22:52:08,509 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:52:08,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973207786] [2021-11-20 22:52:08,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973207786] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:52:08,509 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:52:08,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 22:52:08,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605931363] [2021-11-20 22:52:08,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:52:08,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 22:52:08,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:52:08,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 22:52:08,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:52:08,512 INFO L87 Difference]: Start difference. First operand 17621 states and 24800 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, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-20 22:52:11,399 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:52:14,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:52:14,376 INFO L93 Difference]: Finished difference Result 17631 states and 24807 transitions. [2021-11-20 22:52:14,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:52:14,384 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, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 225 [2021-11-20 22:52:14,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:52:14,438 INFO L225 Difference]: With dead ends: 17631 [2021-11-20 22:52:14,438 INFO L226 Difference]: Without dead ends: 17629 [2021-11-20 22:52:14,446 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 [2021-11-20 22:52:14,447 INFO L933 BasicCegarLoop]: 2677 mSDtfsCounter, 2683 mSDsluCounter, 6987 mSDsCounter, 0 mSdLazyCounter, 1375 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2691 SdHoareTripleChecker+Valid, 8723 SdHoareTripleChecker+Invalid, 1377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1375 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:52:14,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2691 Valid, 8723 Invalid, 1377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1375 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2021-11-20 22:52:14,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17629 states. [2021-11-20 22:52:15,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17629 to 17625. [2021-11-20 22:52:15,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17625 states, 10393 states have (on average 1.2980852496872894) internal successors, (13491), 10794 states have internal predecessors, (13491), 5606 states have call successors, (5606), 1642 states have call predecessors, (5606), 1623 states have return successors, (5706), 5365 states have call predecessors, (5706), 5602 states have call successors, (5706) [2021-11-20 22:52:15,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17625 states to 17625 states and 24803 transitions. [2021-11-20 22:52:15,636 INFO L78 Accepts]: Start accepts. Automaton has 17625 states and 24803 transitions. Word has length 225 [2021-11-20 22:52:15,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:52:15,637 INFO L470 AbstractCegarLoop]: Abstraction has 17625 states and 24803 transitions. [2021-11-20 22:52:15,637 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, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-20 22:52:15,638 INFO L276 IsEmpty]: Start isEmpty. Operand 17625 states and 24803 transitions. [2021-11-20 22:52:15,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-11-20 22:52:15,649 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:52:15,650 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 8, 7, 7, 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] [2021-11-20 22:52:15,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 22:52:15,650 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 22:52:15,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:52:15,651 INFO L85 PathProgramCache]: Analyzing trace with hash 792716647, now seen corresponding path program 1 times [2021-11-20 22:52:15,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:52:15,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703154532] [2021-11-20 22:52:15,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:15,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:52:15,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:15,989 INFO L134 CoverageAnalysis]: Checked inductivity of 865 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2021-11-20 22:52:15,989 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:52:15,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703154532] [2021-11-20 22:52:15,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703154532] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:52:15,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:52:15,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 22:52:15,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525191311] [2021-11-20 22:52:15,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:52:15,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 22:52:15,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:52:15,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 22:52:15,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:52:15,993 INFO L87 Difference]: Start difference. First operand 17625 states and 24803 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, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-20 22:52:19,167 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:52:22,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:52:22,351 INFO L93 Difference]: Finished difference Result 28529 states and 40166 transitions. [2021-11-20 22:52:22,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 22:52:22,352 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, (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 230 [2021-11-20 22:52:22,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:52:22,450 INFO L225 Difference]: With dead ends: 28529 [2021-11-20 22:52:22,450 INFO L226 Difference]: Without dead ends: 28527 [2021-11-20 22:52:22,463 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 [2021-11-20 22:52:22,464 INFO L933 BasicCegarLoop]: 3079 mSDtfsCounter, 1660 mSDsluCounter, 9846 mSDsCounter, 0 mSdLazyCounter, 1878 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1665 SdHoareTripleChecker+Valid, 11560 SdHoareTripleChecker+Invalid, 1882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1878 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-20 22:52:22,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1665 Valid, 11560 Invalid, 1882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1878 Invalid, 1 Unknown, 0 Unchecked, 4.9s Time] [2021-11-20 22:52:22,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28527 states. [2021-11-20 22:52:24,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28527 to 28509. [2021-11-20 22:52:24,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28509 states, 16834 states have (on average 1.3101461328264228) internal successors, (22055), 17591 states have internal predecessors, (22055), 8906 states have call successors, (8906), 2854 states have call predecessors, (8906), 2766 states have return successors, (9188), 8306 states have call predecessors, (9188), 8898 states have call successors, (9188) [2021-11-20 22:52:24,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28509 states to 28509 states and 40149 transitions. [2021-11-20 22:52:24,385 INFO L78 Accepts]: Start accepts. Automaton has 28509 states and 40149 transitions. Word has length 230 [2021-11-20 22:52:24,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:52:24,386 INFO L470 AbstractCegarLoop]: Abstraction has 28509 states and 40149 transitions. [2021-11-20 22:52:24,387 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, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-20 22:52:24,387 INFO L276 IsEmpty]: Start isEmpty. Operand 28509 states and 40149 transitions. [2021-11-20 22:52:24,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-11-20 22:52:24,397 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:52:24,398 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 9, 8, 8, 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] [2021-11-20 22:52:24,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 22:52:24,593 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 22:52:24,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:52:24,594 INFO L85 PathProgramCache]: Analyzing trace with hash 970000062, now seen corresponding path program 1 times [2021-11-20 22:52:24,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:52:24,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011102889] [2021-11-20 22:52:24,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:24,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:52:24,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:24,898 INFO L134 CoverageAnalysis]: Checked inductivity of 895 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 879 trivial. 0 not checked. [2021-11-20 22:52:24,898 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:52:24,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011102889] [2021-11-20 22:52:24,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011102889] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:52:24,899 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:52:24,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 22:52:24,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905146782] [2021-11-20 22:52:24,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:52:24,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 22:52:24,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:52:24,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 22:52:24,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:52:24,902 INFO L87 Difference]: Start difference. First operand 28509 states and 40149 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) [2021-11-20 22:52:27,937 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:52:30,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:52:30,698 INFO L93 Difference]: Finished difference Result 28523 states and 40160 transitions. [2021-11-20 22:52:30,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:52:30,699 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 235 [2021-11-20 22:52:30,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:52:30,801 INFO L225 Difference]: With dead ends: 28523 [2021-11-20 22:52:30,802 INFO L226 Difference]: Without dead ends: 28521 [2021-11-20 22:52:30,814 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 [2021-11-20 22:52:30,814 INFO L933 BasicCegarLoop]: 2677 mSDtfsCounter, 2683 mSDsluCounter, 6985 mSDsCounter, 0 mSdLazyCounter, 1372 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2689 SdHoareTripleChecker+Valid, 8723 SdHoareTripleChecker+Invalid, 1374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1372 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-11-20 22:52:30,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2689 Valid, 8723 Invalid, 1374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1372 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2021-11-20 22:52:30,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28521 states. [2021-11-20 22:52:32,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28521 to 28517. [2021-11-20 22:52:32,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28517 states, 16840 states have (on average 1.3100356294536817) internal successors, (22061), 17597 states have internal predecessors, (22061), 8906 states have call successors, (8906), 2856 states have call predecessors, (8906), 2768 states have return successors, (9188), 8306 states have call predecessors, (9188), 8898 states have call successors, (9188) [2021-11-20 22:52:32,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28517 states to 28517 states and 40155 transitions. [2021-11-20 22:52:32,719 INFO L78 Accepts]: Start accepts. Automaton has 28517 states and 40155 transitions. Word has length 235 [2021-11-20 22:52:32,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:52:32,720 INFO L470 AbstractCegarLoop]: Abstraction has 28517 states and 40155 transitions. [2021-11-20 22:52:32,720 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) [2021-11-20 22:52:32,720 INFO L276 IsEmpty]: Start isEmpty. Operand 28517 states and 40155 transitions. [2021-11-20 22:52:32,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-11-20 22:52:32,730 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:52:32,730 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 10, 9, 9, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:52:32,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 22:52:32,731 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 22:52:32,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:52:32,731 INFO L85 PathProgramCache]: Analyzing trace with hash 988283380, now seen corresponding path program 1 times [2021-11-20 22:52:32,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:52:32,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106797428] [2021-11-20 22:52:32,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:32,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:52:32,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:33,047 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 906 trivial. 0 not checked. [2021-11-20 22:52:33,048 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:52:33,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106797428] [2021-11-20 22:52:33,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106797428] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:52:33,048 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:52:33,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 22:52:33,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368960931] [2021-11-20 22:52:33,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:52:33,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 22:52:33,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:52:33,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 22:52:33,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:52:33,051 INFO L87 Difference]: Start difference. First operand 28517 states and 40155 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-20 22:52:35,900 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:52:39,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:52:39,217 INFO L93 Difference]: Finished difference Result 28531 states and 40166 transitions. [2021-11-20 22:52:39,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:52:39,218 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 241 [2021-11-20 22:52:39,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:52:39,342 INFO L225 Difference]: With dead ends: 28531 [2021-11-20 22:52:39,342 INFO L226 Difference]: Without dead ends: 28529 [2021-11-20 22:52:39,352 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 [2021-11-20 22:52:39,353 INFO L933 BasicCegarLoop]: 2677 mSDtfsCounter, 2682 mSDsluCounter, 6985 mSDsCounter, 0 mSdLazyCounter, 1372 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2687 SdHoareTripleChecker+Valid, 8723 SdHoareTripleChecker+Invalid, 1374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1372 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-11-20 22:52:39,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2687 Valid, 8723 Invalid, 1374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1372 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2021-11-20 22:52:39,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28529 states. [2021-11-20 22:52:40,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28529 to 28525. [2021-11-20 22:52:41,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28525 states, 16846 states have (on average 1.3099252047963907) internal successors, (22067), 17603 states have internal predecessors, (22067), 8906 states have call successors, (8906), 2858 states have call predecessors, (8906), 2770 states have return successors, (9188), 8306 states have call predecessors, (9188), 8898 states have call successors, (9188) [2021-11-20 22:52:41,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28525 states to 28525 states and 40161 transitions. [2021-11-20 22:52:41,317 INFO L78 Accepts]: Start accepts. Automaton has 28525 states and 40161 transitions. Word has length 241 [2021-11-20 22:52:41,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:52:41,318 INFO L470 AbstractCegarLoop]: Abstraction has 28525 states and 40161 transitions. [2021-11-20 22:52:41,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-20 22:52:41,318 INFO L276 IsEmpty]: Start isEmpty. Operand 28525 states and 40161 transitions. [2021-11-20 22:52:41,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2021-11-20 22:52:41,326 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:52:41,327 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 11, 10, 10, 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, 1, 1, 1, 1] [2021-11-20 22:52:41,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 22:52:41,328 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)] === [2021-11-20 22:52:41,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:52:41,328 INFO L85 PathProgramCache]: Analyzing trace with hash -173231074, now seen corresponding path program 1 times [2021-11-20 22:52:41,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:52:41,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162715760] [2021-11-20 22:52:41,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:41,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:52:41,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:41,612 INFO L134 CoverageAnalysis]: Checked inductivity of 967 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 947 trivial. 0 not checked. [2021-11-20 22:52:41,613 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:52:41,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162715760] [2021-11-20 22:52:41,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162715760] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:52:41,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:52:41,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 22:52:41,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508864216] [2021-11-20 22:52:41,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:52:41,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 22:52:41,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:52:41,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 22:52:41,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:52:41,619 INFO L87 Difference]: Start difference. First operand 28525 states and 40161 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, (34), 3 states have call predecessors, (34), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-20 22:52:44,658 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:52:47,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:52:47,515 INFO L93 Difference]: Finished difference Result 28539 states and 40172 transitions. [2021-11-20 22:52:47,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:52:47,516 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, (34), 3 states have call predecessors, (34), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 245 [2021-11-20 22:52:47,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:52:47,693 INFO L225 Difference]: With dead ends: 28539 [2021-11-20 22:52:47,693 INFO L226 Difference]: Without dead ends: 28537 [2021-11-20 22:52:47,702 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 [2021-11-20 22:52:47,703 INFO L933 BasicCegarLoop]: 2677 mSDtfsCounter, 2683 mSDsluCounter, 6985 mSDsCounter, 0 mSdLazyCounter, 1372 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2687 SdHoareTripleChecker+Valid, 8723 SdHoareTripleChecker+Invalid, 1374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1372 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-20 22:52:47,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2687 Valid, 8723 Invalid, 1374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1372 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2021-11-20 22:52:47,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28537 states. [2021-11-20 22:52:49,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28537 to 28533. [2021-11-20 22:52:49,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28533 states, 16852 states have (on average 1.3098148587704723) internal successors, (22073), 17609 states have internal predecessors, (22073), 8906 states have call successors, (8906), 2860 states have call predecessors, (8906), 2772 states have return successors, (9188), 8306 states have call predecessors, (9188), 8898 states have call successors, (9188) [2021-11-20 22:52:49,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28533 states to 28533 states and 40167 transitions. [2021-11-20 22:52:49,130 INFO L78 Accepts]: Start accepts. Automaton has 28533 states and 40167 transitions. Word has length 245 [2021-11-20 22:52:49,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:52:49,131 INFO L470 AbstractCegarLoop]: Abstraction has 28533 states and 40167 transitions. [2021-11-20 22:52:49,131 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, (34), 3 states have call predecessors, (34), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-20 22:52:49,131 INFO L276 IsEmpty]: Start isEmpty. Operand 28533 states and 40167 transitions. [2021-11-20 22:52:49,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-11-20 22:52:49,138 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:52:49,138 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 12, 11, 11, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:52:49,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 22:52:49,138 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 22:52:49,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:52:49,139 INFO L85 PathProgramCache]: Analyzing trace with hash -939754540, now seen corresponding path program 1 times [2021-11-20 22:52:49,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:52:49,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074734359] [2021-11-20 22:52:49,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:49,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:52:49,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:49,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1004 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 982 trivial. 0 not checked. [2021-11-20 22:52:49,382 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:52:49,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074734359] [2021-11-20 22:52:49,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074734359] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:52:49,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:52:49,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 22:52:49,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111143577] [2021-11-20 22:52:49,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:52:49,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 22:52:49,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:52:49,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 22:52:49,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:52:49,385 INFO L87 Difference]: Start difference. First operand 28533 states and 40167 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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) [2021-11-20 22:52:52,705 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:52:55,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:52:55,612 INFO L93 Difference]: Finished difference Result 28547 states and 40178 transitions. [2021-11-20 22:52:55,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:52:55,613 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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 251 [2021-11-20 22:52:55,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:52:55,705 INFO L225 Difference]: With dead ends: 28547 [2021-11-20 22:52:55,706 INFO L226 Difference]: Without dead ends: 28543 [2021-11-20 22:52:55,717 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 [2021-11-20 22:52:55,717 INFO L933 BasicCegarLoop]: 2677 mSDtfsCounter, 2682 mSDsluCounter, 6985 mSDsCounter, 0 mSdLazyCounter, 1372 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2685 SdHoareTripleChecker+Valid, 8723 SdHoareTripleChecker+Invalid, 1374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1372 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-20 22:52:55,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2685 Valid, 8723 Invalid, 1374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1372 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2021-11-20 22:52:55,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28543 states. [2021-11-20 22:52:57,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28543 to 28539. [2021-11-20 22:52:57,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28539 states, 16857 states have (on average 1.3096636412172984) internal successors, (22077), 17613 states have internal predecessors, (22077), 8906 states have call successors, (8906), 2862 states have call predecessors, (8906), 2773 states have return successors, (9188), 8306 states have call predecessors, (9188), 8898 states have call successors, (9188) [2021-11-20 22:52:57,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28539 states to 28539 states and 40171 transitions. [2021-11-20 22:52:57,597 INFO L78 Accepts]: Start accepts. Automaton has 28539 states and 40171 transitions. Word has length 251 [2021-11-20 22:52:57,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:52:57,598 INFO L470 AbstractCegarLoop]: Abstraction has 28539 states and 40171 transitions. [2021-11-20 22:52:57,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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) [2021-11-20 22:52:57,598 INFO L276 IsEmpty]: Start isEmpty. Operand 28539 states and 40171 transitions. [2021-11-20 22:52:57,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-11-20 22:52:57,605 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:52:57,605 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:52:57,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 22:52:57,605 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 22:52:57,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:52:57,606 INFO L85 PathProgramCache]: Analyzing trace with hash 71989401, now seen corresponding path program 1 times [2021-11-20 22:52:57,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:52:57,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613181006] [2021-11-20 22:52:57,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:57,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:52:57,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:57,953 INFO L134 CoverageAnalysis]: Checked inductivity of 793 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 793 trivial. 0 not checked. [2021-11-20 22:52:57,954 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:52:57,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613181006] [2021-11-20 22:52:57,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613181006] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:52:57,954 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:52:57,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 22:52:57,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616239104] [2021-11-20 22:52:57,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:52:57,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 22:52:57,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:52:57,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 22:52:57,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:52:57,956 INFO L87 Difference]: Start difference. First operand 28539 states and 40171 transitions. Second operand has 8 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 3 states have call successors, (41), 2 states have call predecessors, (41), 3 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-20 22:53:01,707 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:53:07,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:53:07,138 INFO L93 Difference]: Finished difference Result 57136 states and 80657 transitions. [2021-11-20 22:53:07,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 22:53:07,151 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 3 states have call successors, (41), 2 states have call predecessors, (41), 3 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) Word has length 256 [2021-11-20 22:53:07,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:53:07,318 INFO L225 Difference]: With dead ends: 57136 [2021-11-20 22:53:07,318 INFO L226 Difference]: Without dead ends: 28827 [2021-11-20 22:53:07,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-20 22:53:07,433 INFO L933 BasicCegarLoop]: 2475 mSDtfsCounter, 9 mSDsluCounter, 17248 mSDsCounter, 0 mSdLazyCounter, 2952 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 17288 SdHoareTripleChecker+Invalid, 2962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2952 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:53:07,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 17288 Invalid, 2962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2952 Invalid, 1 Unknown, 0 Unchecked, 7.0s Time] [2021-11-20 22:53:07,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28827 states. [2021-11-20 22:53:09,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28827 to 28647. [2021-11-20 22:53:09,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28647 states, 16929 states have (on average 1.308346624136098) internal successors, (22149), 17649 states have internal predecessors, (22149), 8942 states have call successors, (8942), 2862 states have call predecessors, (8942), 2773 states have return successors, (9224), 8342 states have call predecessors, (9224), 8934 states have call successors, (9224) [2021-11-20 22:53:09,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28647 states to 28647 states and 40315 transitions. [2021-11-20 22:53:09,471 INFO L78 Accepts]: Start accepts. Automaton has 28647 states and 40315 transitions. Word has length 256 [2021-11-20 22:53:09,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:53:09,472 INFO L470 AbstractCegarLoop]: Abstraction has 28647 states and 40315 transitions. [2021-11-20 22:53:09,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 3 states have call successors, (41), 2 states have call predecessors, (41), 3 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-20 22:53:09,472 INFO L276 IsEmpty]: Start isEmpty. Operand 28647 states and 40315 transitions. [2021-11-20 22:53:09,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-11-20 22:53:09,480 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:53:09,481 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:53:09,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-20 22:53:09,481 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 22:53:09,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:53:09,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1216984386, now seen corresponding path program 1 times [2021-11-20 22:53:09,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:53:09,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367118785] [2021-11-20 22:53:09,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:53:09,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:53:09,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:53:10,011 INFO L134 CoverageAnalysis]: Checked inductivity of 793 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 793 trivial. 0 not checked. [2021-11-20 22:53:10,012 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:53:10,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367118785] [2021-11-20 22:53:10,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367118785] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:53:10,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:53:10,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 22:53:10,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348429375] [2021-11-20 22:53:10,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:53:10,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 22:53:10,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:53:10,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 22:53:10,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:53:10,016 INFO L87 Difference]: Start difference. First operand 28647 states and 40315 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (42), 3 states have call predecessors, (42), 1 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2021-11-20 22:53:12,889 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:53:16,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:53:16,814 INFO L93 Difference]: Finished difference Result 28691 states and 40355 transitions. [2021-11-20 22:53:16,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 22:53:16,815 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (42), 3 states have call predecessors, (42), 1 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) Word has length 259 [2021-11-20 22:53:16,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:53:16,941 INFO L225 Difference]: With dead ends: 28691 [2021-11-20 22:53:16,941 INFO L226 Difference]: Without dead ends: 28689 [2021-11-20 22:53:16,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:53:16,958 INFO L933 BasicCegarLoop]: 3078 mSDtfsCounter, 1655 mSDsluCounter, 9861 mSDsCounter, 0 mSdLazyCounter, 1871 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1657 SdHoareTripleChecker+Valid, 11574 SdHoareTripleChecker+Invalid, 1874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1871 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:53:16,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1657 Valid, 11574 Invalid, 1874 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [2 Valid, 1871 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2021-11-20 22:53:16,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28689 states. [2021-11-20 22:53:18,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28689 to 28671. [2021-11-20 22:53:18,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28671 states, 16947 states have (on average 1.30766507346433) internal successors, (22161), 17667 states have internal predecessors, (22161), 8942 states have call successors, (8942), 2868 states have call predecessors, (8942), 2779 states have return successors, (9224), 8342 states have call predecessors, (9224), 8934 states have call successors, (9224) [2021-11-20 22:53:18,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28671 states to 28671 states and 40327 transitions. [2021-11-20 22:53:18,986 INFO L78 Accepts]: Start accepts. Automaton has 28671 states and 40327 transitions. Word has length 259 [2021-11-20 22:53:18,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:53:18,987 INFO L470 AbstractCegarLoop]: Abstraction has 28671 states and 40327 transitions. [2021-11-20 22:53:18,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (42), 3 states have call predecessors, (42), 1 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2021-11-20 22:53:18,987 INFO L276 IsEmpty]: Start isEmpty. Operand 28671 states and 40327 transitions. [2021-11-20 22:53:18,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-20 22:53:18,992 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:53:18,993 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 13, 12, 12, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:53:18,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-20 22:53:18,993 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 22:53:18,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:53:18,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1623775614, now seen corresponding path program 1 times [2021-11-20 22:53:18,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:53:18,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719561093] [2021-11-20 22:53:18,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:53:18,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:53:19,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:53:19,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1055 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 1031 trivial. 0 not checked. [2021-11-20 22:53:19,257 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:53:19,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719561093] [2021-11-20 22:53:19,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719561093] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:53:19,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:53:19,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 22:53:19,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977767277] [2021-11-20 22:53:19,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:53:19,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 22:53:19,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:53:19,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 22:53:19,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:53:19,260 INFO L87 Difference]: Start difference. First operand 28671 states and 40327 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, (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) [2021-11-20 22:53:22,571 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []