./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-tun.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d7e30b-6ac3-4e3f-9c21-32308d07c881/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d7e30b-6ac3-4e3f-9c21-32308d07c881/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d7e30b-6ac3-4e3f-9c21-32308d07c881/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d7e30b-6ac3-4e3f-9c21-32308d07c881/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-tun.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d7e30b-6ac3-4e3f-9c21-32308d07c881/bin/utaipan-g80aRyZoba/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d7e30b-6ac3-4e3f-9c21-32308d07c881/bin/utaipan-g80aRyZoba --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 97cecdf2f398250e9c44f19d8d35ed7fcac528daa12758af85552fae0658b596 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 02:14:35,879 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:14:35,882 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:14:35,932 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:14:35,934 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:14:35,939 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:14:35,942 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:14:35,946 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:14:35,948 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:14:35,955 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:14:35,957 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:14:35,959 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:14:35,960 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:14:35,963 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:14:35,965 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:14:35,970 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:14:35,972 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:14:35,973 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:14:35,975 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:14:35,981 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:14:35,984 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:14:35,988 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:14:35,990 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:14:35,991 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:14:35,998 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:14:36,004 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:14:36,005 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:14:36,006 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:14:36,008 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:14:36,010 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:14:36,011 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:14:36,013 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:14:36,014 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:14:36,016 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:14:36,019 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:14:36,020 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:14:36,021 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:14:36,021 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:14:36,021 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:14:36,025 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:14:36,026 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:14:36,028 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d7e30b-6ac3-4e3f-9c21-32308d07c881/bin/utaipan-g80aRyZoba/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-22 02:14:36,067 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:14:36,067 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:14:36,068 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:14:36,069 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:14:36,074 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:14:36,074 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:14:36,074 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:14:36,074 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:14:36,075 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:14:36,075 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 02:14:36,075 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:14:36,075 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:14:36,075 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 02:14:36,075 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 02:14:36,076 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:14:36,076 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 02:14:36,076 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 02:14:36,076 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 02:14:36,077 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:14:36,077 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:14:36,078 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:14:36,078 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 02:14:36,078 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:14:36,078 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 02:14:36,078 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 02:14:36,079 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:14:36,079 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 02:14:36,080 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:14:36,080 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:14:36,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:14:36,080 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:14:36,081 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 02:14:36,081 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:14:36,081 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 02:14:36,081 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 02:14:36,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 02:14:36,082 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 02:14:36,082 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:14:36,082 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_93d7e30b-6ac3-4e3f-9c21-32308d07c881/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d7e30b-6ac3-4e3f-9c21-32308d07c881/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 97cecdf2f398250e9c44f19d8d35ed7fcac528daa12758af85552fae0658b596 [2022-11-22 02:14:36,456 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:14:36,482 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:14:36,485 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:14:36,487 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:14:36,487 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:14:36,489 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d7e30b-6ac3-4e3f-9c21-32308d07c881/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-tun.cil.i [2022-11-22 02:14:39,631 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:14:40,428 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:14:40,429 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d7e30b-6ac3-4e3f-9c21-32308d07c881/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-tun.cil.i [2022-11-22 02:14:40,504 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d7e30b-6ac3-4e3f-9c21-32308d07c881/bin/utaipan-g80aRyZoba/data/7c503d3ef/4349f546666d4f3f89d88108bc208fa8/FLAG943c4d777 [2022-11-22 02:14:40,529 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d7e30b-6ac3-4e3f-9c21-32308d07c881/bin/utaipan-g80aRyZoba/data/7c503d3ef/4349f546666d4f3f89d88108bc208fa8 [2022-11-22 02:14:40,535 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:14:40,538 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:14:40,542 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:14:40,542 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:14:40,547 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:14:40,548 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:14:40" (1/1) ... [2022-11-22 02:14:40,550 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@aaa55b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:14:40, skipping insertion in model container [2022-11-22 02:14:40,550 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:14:40" (1/1) ... [2022-11-22 02:14:40,559 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:14:40,740 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:14:45,183 WARN L237 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_93d7e30b-6ac3-4e3f-9c21-32308d07c881/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-tun.cil.i[428896,428909] [2022-11-22 02:14:45,192 WARN L237 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_93d7e30b-6ac3-4e3f-9c21-32308d07c881/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-tun.cil.i[429065,429078] [2022-11-22 02:14:45,192 WARN L237 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_93d7e30b-6ac3-4e3f-9c21-32308d07c881/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-tun.cil.i[429232,429245] [2022-11-22 02:14:45,193 WARN L237 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_93d7e30b-6ac3-4e3f-9c21-32308d07c881/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-tun.cil.i[429400,429413] [2022-11-22 02:14:45,234 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:14:45,317 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:14:45,930 WARN L237 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_93d7e30b-6ac3-4e3f-9c21-32308d07c881/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-tun.cil.i[428896,428909] [2022-11-22 02:14:45,931 WARN L237 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_93d7e30b-6ac3-4e3f-9c21-32308d07c881/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-tun.cil.i[429065,429078] [2022-11-22 02:14:45,931 WARN L237 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_93d7e30b-6ac3-4e3f-9c21-32308d07c881/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-tun.cil.i[429232,429245] [2022-11-22 02:14:45,932 WARN L237 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_93d7e30b-6ac3-4e3f-9c21-32308d07c881/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-tun.cil.i[429400,429413] [2022-11-22 02:14:45,941 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:14:46,280 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:14:46,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:14:46 WrapperNode [2022-11-22 02:14:46,281 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:14:46,282 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:14:46,282 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:14:46,283 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:14:46,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:14:46" (1/1) ... [2022-11-22 02:14:46,464 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:14:46" (1/1) ... [2022-11-22 02:14:46,752 INFO L138 Inliner]: procedures = 614, calls = 2621, calls flagged for inlining = 322, calls inlined = 255, statements flattened = 7227 [2022-11-22 02:14:46,753 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:14:46,755 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:14:46,755 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:14:46,756 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:14:46,768 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:14:46" (1/1) ... [2022-11-22 02:14:46,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:14:46" (1/1) ... [2022-11-22 02:14:46,836 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:14:46" (1/1) ... [2022-11-22 02:14:46,837 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:14:46" (1/1) ... [2022-11-22 02:14:47,028 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:14:46" (1/1) ... [2022-11-22 02:14:47,074 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:14:46" (1/1) ... [2022-11-22 02:14:47,233 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:14:46" (1/1) ... [2022-11-22 02:14:47,246 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:14:46" (1/1) ... [2022-11-22 02:14:47,294 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:14:47,295 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:14:47,295 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:14:47,295 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:14:47,296 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:14:46" (1/1) ... [2022-11-22 02:14:47,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:14:47,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d7e30b-6ac3-4e3f-9c21-32308d07c881/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:14:47,335 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d7e30b-6ac3-4e3f-9c21-32308d07c881/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:14:47,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d7e30b-6ac3-4e3f-9c21-32308d07c881/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:14:47,397 INFO L130 BoogieDeclarations]: Found specification of procedure tun_get [2022-11-22 02:14:47,397 INFO L138 BoogieDeclarations]: Found implementation of procedure tun_get [2022-11-22 02:14:47,397 INFO L130 BoogieDeclarations]: Found specification of procedure debug_lockdep_rcu_enabled [2022-11-22 02:14:47,397 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_lockdep_rcu_enabled [2022-11-22 02:14:47,398 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-22 02:14:47,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-22 02:14:47,398 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2022-11-22 02:14:47,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2022-11-22 02:14:47,398 INFO L130 BoogieDeclarations]: Found specification of procedure skb_get_hash [2022-11-22 02:14:47,399 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_get_hash [2022-11-22 02:14:47,399 INFO L130 BoogieDeclarations]: Found specification of procedure tun_attach [2022-11-22 02:14:47,399 INFO L138 BoogieDeclarations]: Found implementation of procedure tun_attach [2022-11-22 02:14:47,399 INFO L130 BoogieDeclarations]: Found specification of procedure ns_capable [2022-11-22 02:14:47,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ns_capable [2022-11-22 02:14:47,400 INFO L130 BoogieDeclarations]: Found specification of procedure crc32_le [2022-11-22 02:14:47,400 INFO L138 BoogieDeclarations]: Found implementation of procedure crc32_le [2022-11-22 02:14:47,400 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2022-11-22 02:14:47,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2022-11-22 02:14:47,401 INFO L130 BoogieDeclarations]: Found specification of procedure gid_valid [2022-11-22 02:14:47,402 INFO L138 BoogieDeclarations]: Found implementation of procedure gid_valid [2022-11-22 02:14:47,402 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec_and_test [2022-11-22 02:14:47,402 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec_and_test [2022-11-22 02:14:47,403 INFO L130 BoogieDeclarations]: Found specification of procedure skb_end_pointer [2022-11-22 02:14:47,403 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_end_pointer [2022-11-22 02:14:47,404 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2022-11-22 02:14:47,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2022-11-22 02:14:47,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 02:14:47,404 INFO L130 BoogieDeclarations]: Found specification of procedure sock_writeable [2022-11-22 02:14:47,404 INFO L138 BoogieDeclarations]: Found implementation of procedure sock_writeable [2022-11-22 02:14:47,405 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-22 02:14:47,405 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-22 02:14:47,405 INFO L130 BoogieDeclarations]: Found specification of procedure iov_length [2022-11-22 02:14:47,406 INFO L138 BoogieDeclarations]: Found implementation of procedure iov_length [2022-11-22 02:14:47,406 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-11-22 02:14:47,406 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-11-22 02:14:47,406 INFO L130 BoogieDeclarations]: Found specification of procedure sock_put [2022-11-22 02:14:47,406 INFO L138 BoogieDeclarations]: Found implementation of procedure sock_put [2022-11-22 02:14:47,406 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-22 02:14:47,407 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2022-11-22 02:14:47,407 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2022-11-22 02:14:47,407 INFO L130 BoogieDeclarations]: Found specification of procedure tun_get_iff [2022-11-22 02:14:47,407 INFO L138 BoogieDeclarations]: Found implementation of procedure tun_get_iff [2022-11-22 02:14:47,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-22 02:14:47,408 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_bh_76 [2022-11-22 02:14:47,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_bh_76 [2022-11-22 02:14:47,409 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2022-11-22 02:14:47,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2022-11-22 02:14:47,409 INFO L130 BoogieDeclarations]: Found specification of procedure __tun_detach [2022-11-22 02:14:47,409 INFO L138 BoogieDeclarations]: Found implementation of procedure __tun_detach [2022-11-22 02:14:47,410 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 02:14:47,410 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-22 02:14:47,410 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-22 02:14:47,411 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_EMGentry_exit_tun_cleanup_15_2 [2022-11-22 02:14:47,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_EMGentry_exit_tun_cleanup_15_2 [2022-11-22 02:14:47,411 INFO L130 BoogieDeclarations]: Found specification of procedure tun_detach_all [2022-11-22 02:14:47,411 INFO L138 BoogieDeclarations]: Found implementation of procedure tun_detach_all [2022-11-22 02:14:47,411 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_is_watching [2022-11-22 02:14:47,412 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_is_watching [2022-11-22 02:14:47,412 INFO L130 BoogieDeclarations]: Found specification of procedure skb_queue_purge [2022-11-22 02:14:47,412 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_queue_purge [2022-11-22 02:14:47,413 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2022-11-22 02:14:47,413 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2022-11-22 02:14:47,413 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock [2022-11-22 02:14:47,413 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock [2022-11-22 02:14:47,413 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2022-11-22 02:14:47,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2022-11-22 02:14:47,415 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-22 02:14:47,415 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_0 [2022-11-22 02:14:47,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_0 [2022-11-22 02:14:47,416 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_2 [2022-11-22 02:14:47,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_2 [2022-11-22 02:14:47,416 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mod_timer [2022-11-22 02:14:47,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mod_timer [2022-11-22 02:14:47,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 02:14:47,417 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2022-11-22 02:14:47,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2022-11-22 02:14:47,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-22 02:14:47,418 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-11-22 02:14:47,419 INFO L130 BoogieDeclarations]: Found specification of procedure read_pnet [2022-11-22 02:14:47,419 INFO L138 BoogieDeclarations]: Found implementation of procedure read_pnet [2022-11-22 02:14:47,419 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2022-11-22 02:14:47,419 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2022-11-22 02:14:47,419 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2022-11-22 02:14:47,419 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2022-11-22 02:14:47,420 INFO L130 BoogieDeclarations]: Found specification of procedure tun_setup [2022-11-22 02:14:47,420 INFO L138 BoogieDeclarations]: Found implementation of procedure tun_setup [2022-11-22 02:14:47,422 INFO L130 BoogieDeclarations]: Found specification of procedure skb_set_transport_header [2022-11-22 02:14:47,422 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_set_transport_header [2022-11-22 02:14:47,422 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2022-11-22 02:14:47,422 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2022-11-22 02:14:47,422 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2022-11-22 02:14:47,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2022-11-22 02:14:47,423 INFO L130 BoogieDeclarations]: Found specification of procedure tun_flow_find [2022-11-22 02:14:47,423 INFO L138 BoogieDeclarations]: Found implementation of procedure tun_flow_find [2022-11-22 02:14:47,424 INFO L130 BoogieDeclarations]: Found specification of procedure tun_flow_uninit [2022-11-22 02:14:47,424 INFO L138 BoogieDeclarations]: Found implementation of procedure tun_flow_uninit [2022-11-22 02:14:47,424 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2022-11-22 02:14:47,424 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2022-11-22 02:14:47,424 INFO L130 BoogieDeclarations]: Found specification of procedure synchronize_net [2022-11-22 02:14:47,424 INFO L138 BoogieDeclarations]: Found implementation of procedure synchronize_net [2022-11-22 02:14:47,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:14:47,425 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:14:47,425 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_toiovecend [2022-11-22 02:14:47,426 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_toiovecend [2022-11-22 02:14:47,427 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2022-11-22 02:14:47,430 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2022-11-22 02:14:47,431 INFO L130 BoogieDeclarations]: Found specification of procedure tun_flags [2022-11-22 02:14:47,431 INFO L138 BoogieDeclarations]: Found implementation of procedure tun_flags [2022-11-22 02:14:47,431 INFO L130 BoogieDeclarations]: Found specification of procedure __kuid_val [2022-11-22 02:14:47,432 INFO L138 BoogieDeclarations]: Found implementation of procedure __kuid_val [2022-11-22 02:14:47,432 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-22 02:14:47,433 INFO L130 BoogieDeclarations]: Found specification of procedure uid_valid [2022-11-22 02:14:47,434 INFO L138 BoogieDeclarations]: Found implementation of procedure uid_valid [2022-11-22 02:14:47,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-22 02:14:47,440 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-22 02:14:47,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-22 02:14:47,440 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2022-11-22 02:14:47,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2022-11-22 02:14:47,441 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2022-11-22 02:14:47,441 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2022-11-22 02:14:47,441 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_size_call_parameter [2022-11-22 02:14:47,441 INFO L130 BoogieDeclarations]: Found specification of procedure rtnl_unlock [2022-11-22 02:14:47,441 INFO L138 BoogieDeclarations]: Found implementation of procedure rtnl_unlock [2022-11-22 02:14:47,442 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_rtnl_is_held [2022-11-22 02:14:47,442 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_rtnl_is_held [2022-11-22 02:14:47,442 INFO L130 BoogieDeclarations]: Found specification of procedure device_create_file [2022-11-22 02:14:47,442 INFO L138 BoogieDeclarations]: Found implementation of procedure device_create_file [2022-11-22 02:14:47,442 INFO L130 BoogieDeclarations]: Found specification of procedure bitrev32 [2022-11-22 02:14:47,442 INFO L138 BoogieDeclarations]: Found implementation of procedure bitrev32 [2022-11-22 02:14:47,442 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-22 02:14:47,443 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-22 02:14:47,443 INFO L130 BoogieDeclarations]: Found specification of procedure __tun_get [2022-11-22 02:14:47,443 INFO L138 BoogieDeclarations]: Found implementation of procedure __tun_get [2022-11-22 02:14:47,443 INFO L130 BoogieDeclarations]: Found specification of procedure ERR_PTR [2022-11-22 02:14:47,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ERR_PTR [2022-11-22 02:14:47,443 INFO L130 BoogieDeclarations]: Found specification of procedure sk_attach_filter [2022-11-22 02:14:47,444 INFO L138 BoogieDeclarations]: Found implementation of procedure sk_attach_filter [2022-11-22 02:14:47,444 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 02:14:47,444 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2022-11-22 02:14:47,444 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2022-11-22 02:14:47,444 INFO L130 BoogieDeclarations]: Found specification of procedure module_put [2022-11-22 02:14:47,444 INFO L138 BoogieDeclarations]: Found implementation of procedure module_put [2022-11-22 02:14:47,444 INFO L130 BoogieDeclarations]: Found specification of procedure put_net [2022-11-22 02:14:47,445 INFO L138 BoogieDeclarations]: Found implementation of procedure put_net [2022-11-22 02:14:47,445 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-22 02:14:47,445 INFO L130 BoogieDeclarations]: Found specification of procedure skb_copy_datagram_const_iovec [2022-11-22 02:14:47,445 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_copy_datagram_const_iovec [2022-11-22 02:14:47,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-22 02:14:47,445 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2022-11-22 02:14:47,446 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2022-11-22 02:14:47,446 INFO L130 BoogieDeclarations]: Found specification of procedure tun_get_user [2022-11-22 02:14:47,446 INFO L138 BoogieDeclarations]: Found implementation of procedure tun_get_user [2022-11-22 02:14:47,446 INFO L130 BoogieDeclarations]: Found specification of procedure kfree_skb [2022-11-22 02:14:47,446 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree_skb [2022-11-22 02:14:47,446 INFO L130 BoogieDeclarations]: Found specification of procedure __tun_chr_ioctl [2022-11-22 02:14:47,446 INFO L138 BoogieDeclarations]: Found implementation of procedure __tun_chr_ioctl [2022-11-22 02:14:47,447 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-11-22 02:14:47,447 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-11-22 02:14:47,447 INFO L130 BoogieDeclarations]: Found specification of procedure tun_flow_delete [2022-11-22 02:14:47,448 INFO L138 BoogieDeclarations]: Found implementation of procedure tun_flow_delete [2022-11-22 02:14:47,448 INFO L130 BoogieDeclarations]: Found specification of procedure sock_rps_reset_flow_hash [2022-11-22 02:14:47,448 INFO L138 BoogieDeclarations]: Found implementation of procedure sock_rps_reset_flow_hash [2022-11-22 02:14:47,448 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2022-11-22 02:14:47,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2022-11-22 02:14:47,448 INFO L130 BoogieDeclarations]: Found specification of procedure tun_queue_purge [2022-11-22 02:14:47,449 INFO L138 BoogieDeclarations]: Found implementation of procedure tun_queue_purge [2022-11-22 02:14:47,449 INFO L130 BoogieDeclarations]: Found specification of procedure tun_hashfn [2022-11-22 02:14:47,449 INFO L138 BoogieDeclarations]: Found implementation of procedure tun_hashfn [2022-11-22 02:14:47,449 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2022-11-22 02:14:47,449 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2022-11-22 02:14:47,449 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2022-11-22 02:14:47,449 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2022-11-22 02:14:47,450 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-11-22 02:14:47,450 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-11-22 02:14:47,450 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_held [2022-11-22 02:14:47,450 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_held [2022-11-22 02:14:47,450 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_bh_75 [2022-11-22 02:14:47,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_bh_75 [2022-11-22 02:14:47,452 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-22 02:14:47,452 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-22 02:14:47,453 INFO L130 BoogieDeclarations]: Found specification of procedure tun_enable_queue [2022-11-22 02:14:47,453 INFO L138 BoogieDeclarations]: Found implementation of procedure tun_enable_queue [2022-11-22 02:14:47,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 02:14:47,453 INFO L130 BoogieDeclarations]: Found specification of procedure security_tun_dev_free_security [2022-11-22 02:14:47,453 INFO L138 BoogieDeclarations]: Found implementation of procedure security_tun_dev_free_security [2022-11-22 02:14:47,453 INFO L130 BoogieDeclarations]: Found specification of procedure hold_net [2022-11-22 02:14:47,454 INFO L138 BoogieDeclarations]: Found implementation of procedure hold_net [2022-11-22 02:14:47,454 INFO L130 BoogieDeclarations]: Found specification of procedure tun_set_real_num_queues [2022-11-22 02:14:47,454 INFO L138 BoogieDeclarations]: Found implementation of procedure tun_set_real_num_queues [2022-11-22 02:14:47,454 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-22 02:14:47,454 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-22 02:14:47,454 INFO L130 BoogieDeclarations]: Found specification of procedure uid_eq [2022-11-22 02:14:47,454 INFO L138 BoogieDeclarations]: Found implementation of procedure uid_eq [2022-11-22 02:14:47,455 INFO L130 BoogieDeclarations]: Found specification of procedure rtnl_link_unregister [2022-11-22 02:14:47,455 INFO L138 BoogieDeclarations]: Found implementation of procedure rtnl_link_unregister [2022-11-22 02:14:47,455 INFO L130 BoogieDeclarations]: Found specification of procedure tun_do_read [2022-11-22 02:14:47,455 INFO L138 BoogieDeclarations]: Found implementation of procedure tun_do_read [2022-11-22 02:14:47,455 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2022-11-22 02:14:47,455 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2022-11-22 02:14:47,455 INFO L130 BoogieDeclarations]: Found specification of procedure __kgid_val [2022-11-22 02:14:47,456 INFO L138 BoogieDeclarations]: Found implementation of procedure __kgid_val [2022-11-22 02:14:47,456 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2022-11-22 02:14:47,456 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2022-11-22 02:14:47,456 INFO L130 BoogieDeclarations]: Found specification of procedure is_multicast_ether_addr [2022-11-22 02:14:47,456 INFO L138 BoogieDeclarations]: Found implementation of procedure is_multicast_ether_addr [2022-11-22 02:14:47,456 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_inc [2022-11-22 02:14:47,456 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_inc [2022-11-22 02:14:47,457 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_rcu_suspicious [2022-11-22 02:14:47,457 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_rcu_suspicious [2022-11-22 02:14:47,457 INFO L130 BoogieDeclarations]: Found specification of procedure rtnl_lock [2022-11-22 02:14:47,457 INFO L138 BoogieDeclarations]: Found implementation of procedure rtnl_lock [2022-11-22 02:14:47,457 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2022-11-22 02:14:47,457 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2022-11-22 02:14:47,458 INFO L130 BoogieDeclarations]: Found specification of procedure PTR_ERR [2022-11-22 02:14:47,458 INFO L138 BoogieDeclarations]: Found implementation of procedure PTR_ERR [2022-11-22 02:14:47,458 INFO L130 BoogieDeclarations]: Found specification of procedure tun_detach_filter [2022-11-22 02:14:47,458 INFO L138 BoogieDeclarations]: Found implementation of procedure tun_detach_filter [2022-11-22 02:14:47,458 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_fromiovecend [2022-11-22 02:14:47,458 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_fromiovecend [2022-11-22 02:14:47,458 INFO L130 BoogieDeclarations]: Found specification of procedure round_jiffies_up [2022-11-22 02:14:47,459 INFO L138 BoogieDeclarations]: Found implementation of procedure round_jiffies_up [2022-11-22 02:14:47,459 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2022-11-22 02:14:47,459 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2022-11-22 02:14:47,459 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_unlock [2022-11-22 02:14:47,459 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_unlock [2022-11-22 02:14:47,459 INFO L130 BoogieDeclarations]: Found specification of procedure tun_put [2022-11-22 02:14:47,459 INFO L138 BoogieDeclarations]: Found implementation of procedure tun_put [2022-11-22 02:14:47,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 02:14:47,460 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2022-11-22 02:14:47,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2022-11-22 02:14:48,571 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:14:48,575 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:14:49,097 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-22 02:14:54,260 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2022-11-22 02:14:54,347 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:14:57,031 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:14:57,031 INFO L300 CfgBuilder]: Removed 20 assume(true) statements. [2022-11-22 02:14:57,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:14:57 BoogieIcfgContainer [2022-11-22 02:14:57,037 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:14:57,039 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:14:57,039 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:14:57,043 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:14:57,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:14:40" (1/3) ... [2022-11-22 02:14:57,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a2b6e52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:14:57, skipping insertion in model container [2022-11-22 02:14:57,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:14:46" (2/3) ... [2022-11-22 02:14:57,045 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a2b6e52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:14:57, skipping insertion in model container [2022-11-22 02:14:57,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:14:57" (3/3) ... [2022-11-22 02:14:57,047 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-tun.cil.i [2022-11-22 02:14:57,070 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:14:57,070 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-11-22 02:14:57,191 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:14:57,207 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5990bdf6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:14:57,207 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-22 02:14:57,221 INFO L276 IsEmpty]: Start isEmpty. Operand has 1539 states, 950 states have (on average 1.3642105263157895) internal successors, (1296), 986 states have internal predecessors, (1296), 481 states have call successors, (481), 106 states have call predecessors, (481), 105 states have return successors, (474), 473 states have call predecessors, (474), 474 states have call successors, (474) [2022-11-22 02:14:57,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2022-11-22 02:14:57,267 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:14:57,268 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:14:57,269 INFO L420 AbstractCegarLoop]: === Iteration 1 === 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)] === [2022-11-22 02:14:57,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:14:57,275 INFO L85 PathProgramCache]: Analyzing trace with hash 270858453, now seen corresponding path program 1 times [2022-11-22 02:14:57,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:14:57,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318552807] [2022-11-22 02:14:57,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:14:57,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:14:58,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:14:58,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2862 trivial. 0 not checked. [2022-11-22 02:14:58,821 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:14:58,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318552807] [2022-11-22 02:14:58,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318552807] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:14:58,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:14:58,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:14:58,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784394071] [2022-11-22 02:14:58,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:14:58,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:14:58,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:14:58,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:14:58,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:14:58,889 INFO L87 Difference]: Start difference. First operand has 1539 states, 950 states have (on average 1.3642105263157895) internal successors, (1296), 986 states have internal predecessors, (1296), 481 states have call successors, (481), 106 states have call predecessors, (481), 105 states have return successors, (474), 473 states have call predecessors, (474), 474 states have call successors, (474) Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-22 02:15:01,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:15:04,933 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:15:05,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:15:05,382 INFO L93 Difference]: Finished difference Result 4457 states and 6606 transitions. [2022-11-22 02:15:05,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:15:05,385 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (31), 2 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 291 [2022-11-22 02:15:05,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:15:05,432 INFO L225 Difference]: With dead ends: 4457 [2022-11-22 02:15:05,433 INFO L226 Difference]: Without dead ends: 2957 [2022-11-22 02:15:05,456 INFO L412 NwaCegarLoop]: 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 [2022-11-22 02:15:05,459 INFO L413 NwaCegarLoop]: 2421 mSDtfsCounter, 2120 mSDsluCounter, 1881 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2120 SdHoareTripleChecker+Valid, 4302 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:15:05,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2120 Valid, 4302 Invalid, 711 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-11-22 02:15:05,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2957 states. [2022-11-22 02:15:05,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2957 to 2927. [2022-11-22 02:15:05,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2927 states, 1826 states have (on average 1.364184008762322) internal successors, (2491), 1901 states have internal predecessors, (2491), 893 states have call successors, (893), 207 states have call predecessors, (893), 205 states have return successors, (897), 881 states have call predecessors, (897), 889 states have call successors, (897) [2022-11-22 02:15:05,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2927 states to 2927 states and 4281 transitions. [2022-11-22 02:15:05,740 INFO L78 Accepts]: Start accepts. Automaton has 2927 states and 4281 transitions. Word has length 291 [2022-11-22 02:15:05,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:15:05,742 INFO L495 AbstractCegarLoop]: Abstraction has 2927 states and 4281 transitions. [2022-11-22 02:15:05,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-22 02:15:05,742 INFO L276 IsEmpty]: Start isEmpty. Operand 2927 states and 4281 transitions. [2022-11-22 02:15:05,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-11-22 02:15:05,750 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:15:05,750 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:15:05,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 02:15:05,751 INFO L420 AbstractCegarLoop]: === Iteration 2 === 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)] === [2022-11-22 02:15:05,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:15:05,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1449660449, now seen corresponding path program 1 times [2022-11-22 02:15:05,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:15:05,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832099167] [2022-11-22 02:15:05,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:15:05,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:15:06,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:15:06,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2862 trivial. 0 not checked. [2022-11-22 02:15:06,447 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:15:06,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832099167] [2022-11-22 02:15:06,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832099167] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:15:06,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:15:06,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:15:06,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920859725] [2022-11-22 02:15:06,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:15:06,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:15:06,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:15:06,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:15:06,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:15:06,453 INFO L87 Difference]: Start difference. First operand 2927 states and 4281 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2022-11-22 02:15:11,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:15:12,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:15:12,777 INFO L93 Difference]: Finished difference Result 8559 states and 12508 transitions. [2022-11-22 02:15:12,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:15:12,778 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) Word has length 293 [2022-11-22 02:15:12,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:15:12,824 INFO L225 Difference]: With dead ends: 8559 [2022-11-22 02:15:12,824 INFO L226 Difference]: Without dead ends: 5687 [2022-11-22 02:15:12,842 INFO L412 NwaCegarLoop]: 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 [2022-11-22 02:15:12,843 INFO L413 NwaCegarLoop]: 2282 mSDtfsCounter, 2048 mSDsluCounter, 1828 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2048 SdHoareTripleChecker+Valid, 4110 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-11-22 02:15:12,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2048 Valid, 4110 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-11-22 02:15:12,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5687 states. [2022-11-22 02:15:13,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5687 to 5683. [2022-11-22 02:15:13,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5683 states, 3574 states have (on average 1.3651371012870732) internal successors, (4879), 3714 states have internal predecessors, (4879), 1699 states have call successors, (1699), 410 states have call predecessors, (1699), 407 states have return successors, (1711), 1682 states have call predecessors, (1711), 1695 states have call successors, (1711) [2022-11-22 02:15:13,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5683 states to 5683 states and 8289 transitions. [2022-11-22 02:15:13,360 INFO L78 Accepts]: Start accepts. Automaton has 5683 states and 8289 transitions. Word has length 293 [2022-11-22 02:15:13,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:15:13,361 INFO L495 AbstractCegarLoop]: Abstraction has 5683 states and 8289 transitions. [2022-11-22 02:15:13,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2022-11-22 02:15:13,362 INFO L276 IsEmpty]: Start isEmpty. Operand 5683 states and 8289 transitions. [2022-11-22 02:15:13,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2022-11-22 02:15:13,370 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:15:13,371 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 27, 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] [2022-11-22 02:15:13,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 02:15:13,371 INFO L420 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)] === [2022-11-22 02:15:13,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:15:13,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1124327333, now seen corresponding path program 1 times [2022-11-22 02:15:13,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:15:13,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799276260] [2022-11-22 02:15:13,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:15:13,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:15:13,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:15:14,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2864 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2864 trivial. 0 not checked. [2022-11-22 02:15:14,023 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:15:14,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799276260] [2022-11-22 02:15:14,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799276260] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:15:14,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:15:14,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:15:14,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722545599] [2022-11-22 02:15:14,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:15:14,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:15:14,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:15:14,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:15:14,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:15:14,027 INFO L87 Difference]: Start difference. First operand 5683 states and 8289 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, (38), 2 states have call predecessors, (38), 1 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2022-11-22 02:15:18,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:15:20,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:15:20,292 INFO L93 Difference]: Finished difference Result 11199 states and 16271 transitions. [2022-11-22 02:15:20,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:15:20,293 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, (38), 2 states have call predecessors, (38), 1 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) Word has length 317 [2022-11-22 02:15:20,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:15:20,336 INFO L225 Difference]: With dead ends: 11199 [2022-11-22 02:15:20,336 INFO L226 Difference]: Without dead ends: 5571 [2022-11-22 02:15:20,367 INFO L412 NwaCegarLoop]: 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 [2022-11-22 02:15:20,371 INFO L413 NwaCegarLoop]: 2115 mSDtfsCounter, 1025 mSDsluCounter, 1826 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1025 SdHoareTripleChecker+Valid, 3941 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-11-22 02:15:20,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1025 Valid, 3941 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 752 Invalid, 1 Unknown, 0 Unchecked, 5.8s Time] [2022-11-22 02:15:20,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5571 states. [2022-11-22 02:15:20,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5571 to 5541. [2022-11-22 02:15:20,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5541 states, 3516 states have (on average 1.3552332195676906) internal successors, (4765), 3643 states have internal predecessors, (4765), 1605 states have call successors, (1605), 421 states have call predecessors, (1605), 417 states have return successors, (1613), 1581 states have call predecessors, (1613), 1601 states have call successors, (1613) [2022-11-22 02:15:20,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5541 states to 5541 states and 7983 transitions. [2022-11-22 02:15:20,821 INFO L78 Accepts]: Start accepts. Automaton has 5541 states and 7983 transitions. Word has length 317 [2022-11-22 02:15:20,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:15:20,822 INFO L495 AbstractCegarLoop]: Abstraction has 5541 states and 7983 transitions. [2022-11-22 02:15:20,823 INFO L496 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, (38), 2 states have call predecessors, (38), 1 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2022-11-22 02:15:20,823 INFO L276 IsEmpty]: Start isEmpty. Operand 5541 states and 7983 transitions. [2022-11-22 02:15:20,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2022-11-22 02:15:20,830 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:15:20,831 INFO L195 NwaCegarLoop]: trace histogram [30, 27, 27, 27, 27, 27, 27, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:15:20,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 02:15:20,831 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-22 02:15:20,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:15:20,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1788083357, now seen corresponding path program 1 times [2022-11-22 02:15:20,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:15:20,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207393866] [2022-11-22 02:15:20,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:15:20,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:15:20,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:15:21,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2996 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2996 trivial. 0 not checked. [2022-11-22 02:15:21,802 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:15:21,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207393866] [2022-11-22 02:15:21,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207393866] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:15:21,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:15:21,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:15:21,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265871528] [2022-11-22 02:15:21,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:15:21,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:15:21,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:15:21,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:15:21,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:15:21,806 INFO L87 Difference]: Start difference. First operand 5541 states and 7983 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (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) [2022-11-22 02:15:26,364 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:15:29,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:15:29,000 INFO L93 Difference]: Finished difference Result 5922 states and 8408 transitions. [2022-11-22 02:15:29,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:15:29,001 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (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 329 [2022-11-22 02:15:29,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:15:29,038 INFO L225 Difference]: With dead ends: 5922 [2022-11-22 02:15:29,038 INFO L226 Difference]: Without dead ends: 5920 [2022-11-22 02:15:29,043 INFO L412 NwaCegarLoop]: 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 [2022-11-22 02:15:29,044 INFO L413 NwaCegarLoop]: 1940 mSDtfsCounter, 1986 mSDsluCounter, 4202 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2002 SdHoareTripleChecker+Valid, 6142 SdHoareTripleChecker+Invalid, 1167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-11-22 02:15:29,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2002 Valid, 6142 Invalid, 1167 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 1165 Invalid, 1 Unknown, 0 Unchecked, 6.8s Time] [2022-11-22 02:15:29,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5920 states. [2022-11-22 02:15:29,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5920 to 5916. [2022-11-22 02:15:29,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5916 states, 3734 states have (on average 1.3465452597750402) internal successors, (5028), 3875 states have internal predecessors, (5028), 1682 states have call successors, (1682), 499 states have call predecessors, (1682), 497 states have return successors, (1694), 1657 states have call predecessors, (1694), 1678 states have call successors, (1694) [2022-11-22 02:15:29,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5916 states to 5916 states and 8404 transitions. [2022-11-22 02:15:29,500 INFO L78 Accepts]: Start accepts. Automaton has 5916 states and 8404 transitions. Word has length 329 [2022-11-22 02:15:29,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:15:29,501 INFO L495 AbstractCegarLoop]: Abstraction has 5916 states and 8404 transitions. [2022-11-22 02:15:29,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (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) [2022-11-22 02:15:29,502 INFO L276 IsEmpty]: Start isEmpty. Operand 5916 states and 8404 transitions. [2022-11-22 02:15:29,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2022-11-22 02:15:29,510 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:15:29,511 INFO L195 NwaCegarLoop]: trace histogram [30, 27, 27, 27, 27, 27, 27, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:15:29,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 02:15:29,511 INFO L420 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)] === [2022-11-22 02:15:29,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:15:29,516 INFO L85 PathProgramCache]: Analyzing trace with hash 2022764139, now seen corresponding path program 1 times [2022-11-22 02:15:29,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:15:29,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78548886] [2022-11-22 02:15:29,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:15:29,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:15:29,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:15:30,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2998 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2996 trivial. 0 not checked. [2022-11-22 02:15:30,466 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:15:30,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78548886] [2022-11-22 02:15:30,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78548886] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:15:30,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:15:30,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:15:30,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089770181] [2022-11-22 02:15:30,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:15:30,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:15:30,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:15:30,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:15:30,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:15:30,473 INFO L87 Difference]: Start difference. First operand 5916 states and 8404 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2022-11-22 02:15:34,065 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:15:36,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:15:38,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:15:38,649 INFO L93 Difference]: Finished difference Result 5922 states and 8409 transitions. [2022-11-22 02:15:38,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:15:38,650 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 334 [2022-11-22 02:15:38,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:15:38,701 INFO L225 Difference]: With dead ends: 5922 [2022-11-22 02:15:38,701 INFO L226 Difference]: Without dead ends: 5920 [2022-11-22 02:15:38,706 INFO L412 NwaCegarLoop]: 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 [2022-11-22 02:15:38,707 INFO L413 NwaCegarLoop]: 1871 mSDtfsCounter, 2132 mSDsluCounter, 3720 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2145 SdHoareTripleChecker+Valid, 5591 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2022-11-22 02:15:38,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2145 Valid, 5591 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1074 Invalid, 1 Unknown, 0 Unchecked, 7.8s Time] [2022-11-22 02:15:38,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5920 states. [2022-11-22 02:15:39,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5920 to 5920. [2022-11-22 02:15:39,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5920 states, 3737 states have (on average 1.3462670591383463) internal successors, (5031), 3878 states have internal predecessors, (5031), 1682 states have call successors, (1682), 500 states have call predecessors, (1682), 498 states have return successors, (1694), 1657 states have call predecessors, (1694), 1678 states have call successors, (1694) [2022-11-22 02:15:39,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5920 states to 5920 states and 8407 transitions. [2022-11-22 02:15:39,162 INFO L78 Accepts]: Start accepts. Automaton has 5920 states and 8407 transitions. Word has length 334 [2022-11-22 02:15:39,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:15:39,164 INFO L495 AbstractCegarLoop]: Abstraction has 5920 states and 8407 transitions. [2022-11-22 02:15:39,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2022-11-22 02:15:39,164 INFO L276 IsEmpty]: Start isEmpty. Operand 5920 states and 8407 transitions. [2022-11-22 02:15:39,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2022-11-22 02:15:39,173 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:15:39,173 INFO L195 NwaCegarLoop]: trace histogram [30, 27, 27, 27, 27, 27, 27, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:15:39,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 02:15:39,174 INFO L420 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)] === [2022-11-22 02:15:39,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:15:39,175 INFO L85 PathProgramCache]: Analyzing trace with hash 725948966, now seen corresponding path program 1 times [2022-11-22 02:15:39,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:15:39,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856684848] [2022-11-22 02:15:39,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:15:39,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:15:39,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:15:39,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3007 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3003 trivial. 0 not checked. [2022-11-22 02:15:39,882 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:15:39,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856684848] [2022-11-22 02:15:39,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856684848] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:15:39,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:15:39,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:15:39,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587610439] [2022-11-22 02:15:39,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:15:39,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:15:39,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:15:39,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:15:39,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:15:39,886 INFO L87 Difference]: Start difference. First operand 5920 states and 8407 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (41), 3 states have call predecessors, (41), 1 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2022-11-22 02:15:43,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:15:44,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:15:45,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:15:47,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:15:47,997 INFO L93 Difference]: Finished difference Result 5926 states and 8412 transitions. [2022-11-22 02:15:47,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:15:47,997 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (41), 3 states have call predecessors, (41), 1 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) Word has length 345 [2022-11-22 02:15:47,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:15:48,026 INFO L225 Difference]: With dead ends: 5926 [2022-11-22 02:15:48,026 INFO L226 Difference]: Without dead ends: 5924 [2022-11-22 02:15:48,031 INFO L412 NwaCegarLoop]: 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 [2022-11-22 02:15:48,032 INFO L413 NwaCegarLoop]: 1871 mSDtfsCounter, 2131 mSDsluCounter, 3720 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2143 SdHoareTripleChecker+Valid, 5591 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-11-22 02:15:48,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2143 Valid, 5591 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2022-11-22 02:15:48,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5924 states. [2022-11-22 02:15:48,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5924 to 5924. [2022-11-22 02:15:48,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5924 states, 3740 states have (on average 1.3459893048128342) internal successors, (5034), 3881 states have internal predecessors, (5034), 1682 states have call successors, (1682), 501 states have call predecessors, (1682), 499 states have return successors, (1694), 1657 states have call predecessors, (1694), 1678 states have call successors, (1694) [2022-11-22 02:15:48,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5924 states to 5924 states and 8410 transitions. [2022-11-22 02:15:48,477 INFO L78 Accepts]: Start accepts. Automaton has 5924 states and 8410 transitions. Word has length 345 [2022-11-22 02:15:48,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:15:48,478 INFO L495 AbstractCegarLoop]: Abstraction has 5924 states and 8410 transitions. [2022-11-22 02:15:48,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (41), 3 states have call predecessors, (41), 1 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2022-11-22 02:15:48,479 INFO L276 IsEmpty]: Start isEmpty. Operand 5924 states and 8410 transitions. [2022-11-22 02:15:48,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2022-11-22 02:15:48,490 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:15:48,490 INFO L195 NwaCegarLoop]: trace histogram [30, 27, 27, 27, 27, 27, 27, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:15:48,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 02:15:48,491 INFO L420 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)] === [2022-11-22 02:15:48,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:15:48,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1479173483, now seen corresponding path program 1 times [2022-11-22 02:15:48,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:15:48,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377090353] [2022-11-22 02:15:48,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:15:48,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:15:48,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:15:49,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3014 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3008 trivial. 0 not checked. [2022-11-22 02:15:49,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:15:49,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377090353] [2022-11-22 02:15:49,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377090353] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:15:49,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:15:49,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:15:49,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690554663] [2022-11-22 02:15:49,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:15:49,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:15:49,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:15:49,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:15:49,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:15:49,334 INFO L87 Difference]: Start difference. First operand 5924 states and 8410 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2022-11-22 02:15:53,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:15:54,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:15:56,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:15:58,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:15:58,258 INFO L93 Difference]: Finished difference Result 5930 states and 8415 transitions. [2022-11-22 02:15:58,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:15:58,259 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) Word has length 344 [2022-11-22 02:15:58,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:15:58,285 INFO L225 Difference]: With dead ends: 5930 [2022-11-22 02:15:58,285 INFO L226 Difference]: Without dead ends: 5928 [2022-11-22 02:15:58,290 INFO L412 NwaCegarLoop]: 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 [2022-11-22 02:15:58,291 INFO L413 NwaCegarLoop]: 1871 mSDtfsCounter, 2132 mSDsluCounter, 3720 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2143 SdHoareTripleChecker+Valid, 5591 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:15:58,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2143 Valid, 5591 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1074 Invalid, 1 Unknown, 0 Unchecked, 8.6s Time] [2022-11-22 02:15:58,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5928 states. [2022-11-22 02:15:58,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5928 to 5928. [2022-11-22 02:15:58,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5928 states, 3743 states have (on average 1.345711995725354) internal successors, (5037), 3884 states have internal predecessors, (5037), 1682 states have call successors, (1682), 502 states have call predecessors, (1682), 500 states have return successors, (1694), 1657 states have call predecessors, (1694), 1678 states have call successors, (1694) [2022-11-22 02:15:58,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5928 states to 5928 states and 8413 transitions. [2022-11-22 02:15:58,687 INFO L78 Accepts]: Start accepts. Automaton has 5928 states and 8413 transitions. Word has length 344 [2022-11-22 02:15:58,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:15:58,687 INFO L495 AbstractCegarLoop]: Abstraction has 5928 states and 8413 transitions. [2022-11-22 02:15:58,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2022-11-22 02:15:58,688 INFO L276 IsEmpty]: Start isEmpty. Operand 5928 states and 8413 transitions. [2022-11-22 02:15:58,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2022-11-22 02:15:58,697 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:15:58,698 INFO L195 NwaCegarLoop]: trace histogram [30, 27, 27, 27, 27, 27, 27, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:15:58,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-22 02:15:58,698 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-22 02:15:58,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:15:58,699 INFO L85 PathProgramCache]: Analyzing trace with hash 2016164710, now seen corresponding path program 1 times [2022-11-22 02:15:58,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:15:58,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607018500] [2022-11-22 02:15:58,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:15:58,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:15:58,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:15:59,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3031 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3023 trivial. 0 not checked. [2022-11-22 02:15:59,383 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:15:59,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607018500] [2022-11-22 02:15:59,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607018500] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:15:59,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:15:59,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:15:59,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247910653] [2022-11-22 02:15:59,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:15:59,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:15:59,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:15:59,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:15:59,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:15:59,386 INFO L87 Difference]: Start difference. First operand 5928 states and 8413 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (43), 3 states have call predecessors, (43), 1 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2022-11-22 02:16:03,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:16:04,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:16:06,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:16:06,588 INFO L93 Difference]: Finished difference Result 5934 states and 8418 transitions. [2022-11-22 02:16:06,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:16:06,589 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (43), 3 states have call predecessors, (43), 1 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) Word has length 355 [2022-11-22 02:16:06,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:16:06,610 INFO L225 Difference]: With dead ends: 5934 [2022-11-22 02:16:06,610 INFO L226 Difference]: Without dead ends: 5932 [2022-11-22 02:16:06,615 INFO L412 NwaCegarLoop]: 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 [2022-11-22 02:16:06,616 INFO L413 NwaCegarLoop]: 1871 mSDtfsCounter, 2131 mSDsluCounter, 3720 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2141 SdHoareTripleChecker+Valid, 5591 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-11-22 02:16:06,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2141 Valid, 5591 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2022-11-22 02:16:06,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5932 states. [2022-11-22 02:16:07,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5932 to 5932. [2022-11-22 02:16:07,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5932 states, 3746 states have (on average 1.3454351308061934) internal successors, (5040), 3887 states have internal predecessors, (5040), 1682 states have call successors, (1682), 503 states have call predecessors, (1682), 501 states have return successors, (1694), 1657 states have call predecessors, (1694), 1678 states have call successors, (1694) [2022-11-22 02:16:07,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5932 states to 5932 states and 8416 transitions. [2022-11-22 02:16:07,034 INFO L78 Accepts]: Start accepts. Automaton has 5932 states and 8416 transitions. Word has length 355 [2022-11-22 02:16:07,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:16:07,035 INFO L495 AbstractCegarLoop]: Abstraction has 5932 states and 8416 transitions. [2022-11-22 02:16:07,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (43), 3 states have call predecessors, (43), 1 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2022-11-22 02:16:07,036 INFO L276 IsEmpty]: Start isEmpty. Operand 5932 states and 8416 transitions. [2022-11-22 02:16:07,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2022-11-22 02:16:07,045 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:16:07,045 INFO L195 NwaCegarLoop]: trace histogram [30, 27, 27, 27, 27, 27, 27, 6, 5, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:16:07,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-22 02:16:07,046 INFO L420 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)] === [2022-11-22 02:16:07,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:16:07,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1306649666, now seen corresponding path program 1 times [2022-11-22 02:16:07,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:16:07,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731478331] [2022-11-22 02:16:07,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:16:07,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:16:07,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:16:07,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3049 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3039 trivial. 0 not checked. [2022-11-22 02:16:07,754 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:16:07,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731478331] [2022-11-22 02:16:07,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731478331] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:16:07,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:16:07,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:16:07,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866626015] [2022-11-22 02:16:07,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:16:07,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:16:07,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:16:07,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:16:07,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:16:07,757 INFO L87 Difference]: Start difference. First operand 5932 states and 8416 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (44), 3 states have call predecessors, (44), 1 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2022-11-22 02:16:11,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:16:12,789 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:16:15,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:16:15,994 INFO L93 Difference]: Finished difference Result 5938 states and 8421 transitions. [2022-11-22 02:16:15,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:16:15,994 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (44), 3 states have call predecessors, (44), 1 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) Word has length 360 [2022-11-22 02:16:15,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:16:16,019 INFO L225 Difference]: With dead ends: 5938 [2022-11-22 02:16:16,019 INFO L226 Difference]: Without dead ends: 5936 [2022-11-22 02:16:16,024 INFO L412 NwaCegarLoop]: 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 [2022-11-22 02:16:16,024 INFO L413 NwaCegarLoop]: 1871 mSDtfsCounter, 2131 mSDsluCounter, 3720 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2140 SdHoareTripleChecker+Valid, 5591 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-11-22 02:16:16,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2140 Valid, 5591 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2022-11-22 02:16:16,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5936 states. [2022-11-22 02:16:16,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5936 to 5936. [2022-11-22 02:16:16,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5936 states, 3749 states have (on average 1.3451587089890638) internal successors, (5043), 3890 states have internal predecessors, (5043), 1682 states have call successors, (1682), 504 states have call predecessors, (1682), 502 states have return successors, (1694), 1657 states have call predecessors, (1694), 1678 states have call successors, (1694) [2022-11-22 02:16:16,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5936 states to 5936 states and 8419 transitions. [2022-11-22 02:16:16,470 INFO L78 Accepts]: Start accepts. Automaton has 5936 states and 8419 transitions. Word has length 360 [2022-11-22 02:16:16,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:16:16,471 INFO L495 AbstractCegarLoop]: Abstraction has 5936 states and 8419 transitions. [2022-11-22 02:16:16,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (44), 3 states have call predecessors, (44), 1 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2022-11-22 02:16:16,471 INFO L276 IsEmpty]: Start isEmpty. Operand 5936 states and 8419 transitions. [2022-11-22 02:16:16,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-22 02:16:16,478 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:16:16,478 INFO L195 NwaCegarLoop]: trace histogram [30, 27, 27, 27, 27, 27, 27, 7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:16:16,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-22 02:16:16,479 INFO L420 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)] === [2022-11-22 02:16:16,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:16:16,484 INFO L85 PathProgramCache]: Analyzing trace with hash 727270941, now seen corresponding path program 1 times [2022-11-22 02:16:16,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:16:16,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160547132] [2022-11-22 02:16:16,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:16:16,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:16:16,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:16:17,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3068 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 3056 trivial. 0 not checked. [2022-11-22 02:16:17,116 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:16:17,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160547132] [2022-11-22 02:16:17,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160547132] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:16:17,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:16:17,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:16:17,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378692511] [2022-11-22 02:16:17,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:16:17,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:16:17,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:16:17,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:16:17,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:16:17,119 INFO L87 Difference]: Start difference. First operand 5936 states and 8419 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (42), 3 states have call predecessors, (42), 1 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) [2022-11-22 02:16:20,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:16:21,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:16:22,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:16:25,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:16:25,246 INFO L93 Difference]: Finished difference Result 5942 states and 8424 transitions. [2022-11-22 02:16:25,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:16:25,246 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (42), 3 states have call predecessors, (42), 1 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) Word has length 359 [2022-11-22 02:16:25,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:16:25,270 INFO L225 Difference]: With dead ends: 5942 [2022-11-22 02:16:25,270 INFO L226 Difference]: Without dead ends: 5940 [2022-11-22 02:16:25,275 INFO L412 NwaCegarLoop]: 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 [2022-11-22 02:16:25,276 INFO L413 NwaCegarLoop]: 1871 mSDtfsCounter, 2132 mSDsluCounter, 3720 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2140 SdHoareTripleChecker+Valid, 5591 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-11-22 02:16:25,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2140 Valid, 5591 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2022-11-22 02:16:25,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5940 states. [2022-11-22 02:16:25,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5940 to 5940. [2022-11-22 02:16:25,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5940 states, 3752 states have (on average 1.3448827292110874) internal successors, (5046), 3893 states have internal predecessors, (5046), 1682 states have call successors, (1682), 505 states have call predecessors, (1682), 503 states have return successors, (1694), 1657 states have call predecessors, (1694), 1678 states have call successors, (1694) [2022-11-22 02:16:25,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5940 states to 5940 states and 8422 transitions. [2022-11-22 02:16:25,854 INFO L78 Accepts]: Start accepts. Automaton has 5940 states and 8422 transitions. Word has length 359 [2022-11-22 02:16:25,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:16:25,855 INFO L495 AbstractCegarLoop]: Abstraction has 5940 states and 8422 transitions. [2022-11-22 02:16:25,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (42), 3 states have call predecessors, (42), 1 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) [2022-11-22 02:16:25,855 INFO L276 IsEmpty]: Start isEmpty. Operand 5940 states and 8422 transitions. [2022-11-22 02:16:25,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2022-11-22 02:16:25,863 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:16:25,863 INFO L195 NwaCegarLoop]: trace histogram [30, 27, 27, 27, 27, 27, 27, 8, 7, 7, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:16:25,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-22 02:16:25,864 INFO L420 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)] === [2022-11-22 02:16:25,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:16:25,865 INFO L85 PathProgramCache]: Analyzing trace with hash -674487445, now seen corresponding path program 1 times [2022-11-22 02:16:25,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:16:25,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466288869] [2022-11-22 02:16:25,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:16:25,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:16:25,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:16:26,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3094 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2022-11-22 02:16:26,503 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:16:26,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466288869] [2022-11-22 02:16:26,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466288869] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:16:26,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:16:26,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:16:26,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368255794] [2022-11-22 02:16:26,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:16:26,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:16:26,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:16:26,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:16:26,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:16:26,505 INFO L87 Difference]: Start difference. First operand 5940 states and 8422 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (43), 3 states have call predecessors, (43), 1 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2022-11-22 02:16:32,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:16:33,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:16:34,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:16:34,921 INFO L93 Difference]: Finished difference Result 6331 states and 8885 transitions. [2022-11-22 02:16:34,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:16:34,922 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (43), 3 states have call predecessors, (43), 1 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) Word has length 364 [2022-11-22 02:16:34,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:16:34,945 INFO L225 Difference]: With dead ends: 6331 [2022-11-22 02:16:34,946 INFO L226 Difference]: Without dead ends: 6329 [2022-11-22 02:16:34,951 INFO L412 NwaCegarLoop]: 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 [2022-11-22 02:16:34,951 INFO L413 NwaCegarLoop]: 1903 mSDtfsCounter, 2029 mSDsluCounter, 3957 mSDsCounter, 0 mSdLazyCounter, 1122 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2036 SdHoareTripleChecker+Valid, 5860 SdHoareTripleChecker+Invalid, 1124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:16:34,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2036 Valid, 5860 Invalid, 1124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1122 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2022-11-22 02:16:34,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6329 states. [2022-11-22 02:16:35,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6329 to 6329. [2022-11-22 02:16:35,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6329 states, 3989 states have (on average 1.3374279267986964) internal successors, (5335), 4138 states have internal predecessors, (5335), 1768 states have call successors, (1768), 571 states have call predecessors, (1768), 569 states have return successors, (1780), 1743 states have call predecessors, (1780), 1764 states have call successors, (1780) [2022-11-22 02:16:35,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6329 states to 6329 states and 8883 transitions. [2022-11-22 02:16:35,512 INFO L78 Accepts]: Start accepts. Automaton has 6329 states and 8883 transitions. Word has length 364 [2022-11-22 02:16:35,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:16:35,513 INFO L495 AbstractCegarLoop]: Abstraction has 6329 states and 8883 transitions. [2022-11-22 02:16:35,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (43), 3 states have call predecessors, (43), 1 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2022-11-22 02:16:35,513 INFO L276 IsEmpty]: Start isEmpty. Operand 6329 states and 8883 transitions. [2022-11-22 02:16:35,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2022-11-22 02:16:35,522 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:16:35,522 INFO L195 NwaCegarLoop]: trace histogram [31, 27, 27, 27, 27, 27, 27, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:16:35,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-22 02:16:35,523 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-22 02:16:35,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:16:35,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1542392123, now seen corresponding path program 1 times [2022-11-22 02:16:35,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:16:35,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089977107] [2022-11-22 02:16:35,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:16:35,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:16:35,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:16:35,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3071 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3068 trivial. 0 not checked. [2022-11-22 02:16:35,942 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:16:35,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089977107] [2022-11-22 02:16:35,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089977107] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:16:35,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:16:35,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:16:35,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169668065] [2022-11-22 02:16:35,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:16:35,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:16:35,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:16:35,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:16:35,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:16:35,945 INFO L87 Difference]: Start difference. First operand 6329 states and 8883 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (43), 3 states have call predecessors, (43), 3 states have call successors, (43) [2022-11-22 02:16:41,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:16:41,278 INFO L93 Difference]: Finished difference Result 12771 states and 17927 transitions. [2022-11-22 02:16:41,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:16:41,279 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (43), 3 states have call predecessors, (43), 3 states have call successors, (43) Word has length 369 [2022-11-22 02:16:41,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:16:41,303 INFO L225 Difference]: With dead ends: 12771 [2022-11-22 02:16:41,303 INFO L226 Difference]: Without dead ends: 7854 [2022-11-22 02:16:41,319 INFO L412 NwaCegarLoop]: 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 [2022-11-22 02:16:41,320 INFO L413 NwaCegarLoop]: 2714 mSDtfsCounter, 1023 mSDsluCounter, 1817 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1023 SdHoareTripleChecker+Valid, 4531 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-22 02:16:41,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1023 Valid, 4531 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-11-22 02:16:41,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7854 states. [2022-11-22 02:16:41,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7854 to 7792. [2022-11-22 02:16:41,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7792 states, 4923 states have (on average 1.3384115376802763) internal successors, (6589), 5105 states have internal predecessors, (6589), 2170 states have call successors, (2170), 700 states have call predecessors, (2170), 696 states have return successors, (2184), 2134 states have call predecessors, (2184), 2166 states have call successors, (2184) [2022-11-22 02:16:41,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7792 states to 7792 states and 10943 transitions. [2022-11-22 02:16:41,917 INFO L78 Accepts]: Start accepts. Automaton has 7792 states and 10943 transitions. Word has length 369 [2022-11-22 02:16:41,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:16:41,918 INFO L495 AbstractCegarLoop]: Abstraction has 7792 states and 10943 transitions. [2022-11-22 02:16:41,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (43), 3 states have call predecessors, (43), 3 states have call successors, (43) [2022-11-22 02:16:41,919 INFO L276 IsEmpty]: Start isEmpty. Operand 7792 states and 10943 transitions. [2022-11-22 02:16:41,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2022-11-22 02:16:41,928 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:16:41,928 INFO L195 NwaCegarLoop]: trace histogram [30, 27, 27, 27, 27, 27, 27, 9, 8, 8, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:16:41,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-22 02:16:41,929 INFO L420 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)] === [2022-11-22 02:16:41,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:16:41,930 INFO L85 PathProgramCache]: Analyzing trace with hash 2127420902, now seen corresponding path program 1 times [2022-11-22 02:16:41,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:16:41,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436188612] [2022-11-22 02:16:41,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:16:41,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:16:42,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:16:42,549 INFO L134 CoverageAnalysis]: Checked inductivity of 3127 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 3111 trivial. 0 not checked. [2022-11-22 02:16:42,550 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:16:42,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436188612] [2022-11-22 02:16:42,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436188612] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:16:42,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:16:42,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:16:42,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459637596] [2022-11-22 02:16:42,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:16:42,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:16:42,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:16:42,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:16:42,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:16:42,553 INFO L87 Difference]: Start difference. First operand 7792 states and 10943 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (47), 3 states have call predecessors, (47), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) [2022-11-22 02:16:48,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:16:50,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:16:50,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:16:50,899 INFO L93 Difference]: Finished difference Result 7798 states and 10948 transitions. [2022-11-22 02:16:50,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:16:50,900 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (47), 3 states have call predecessors, (47), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) Word has length 375 [2022-11-22 02:16:50,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:16:50,922 INFO L225 Difference]: With dead ends: 7798 [2022-11-22 02:16:50,922 INFO L226 Difference]: Without dead ends: 7796 [2022-11-22 02:16:50,927 INFO L412 NwaCegarLoop]: 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 [2022-11-22 02:16:50,927 INFO L413 NwaCegarLoop]: 1871 mSDtfsCounter, 2131 mSDsluCounter, 3720 mSDsCounter, 0 mSdLazyCounter, 1073 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2137 SdHoareTripleChecker+Valid, 5591 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1073 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2022-11-22 02:16:50,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2137 Valid, 5591 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1073 Invalid, 2 Unknown, 0 Unchecked, 7.8s Time] [2022-11-22 02:16:50,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7796 states. [2022-11-22 02:16:51,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7796 to 7796. [2022-11-22 02:16:51,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7796 states, 4926 states have (on average 1.3382054405196915) internal successors, (6592), 5108 states have internal predecessors, (6592), 2170 states have call successors, (2170), 701 states have call predecessors, (2170), 697 states have return successors, (2184), 2134 states have call predecessors, (2184), 2166 states have call successors, (2184) [2022-11-22 02:16:51,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7796 states to 7796 states and 10946 transitions. [2022-11-22 02:16:51,678 INFO L78 Accepts]: Start accepts. Automaton has 7796 states and 10946 transitions. Word has length 375 [2022-11-22 02:16:51,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:16:51,679 INFO L495 AbstractCegarLoop]: Abstraction has 7796 states and 10946 transitions. [2022-11-22 02:16:51,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (47), 3 states have call predecessors, (47), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) [2022-11-22 02:16:51,679 INFO L276 IsEmpty]: Start isEmpty. Operand 7796 states and 10946 transitions. [2022-11-22 02:16:51,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2022-11-22 02:16:51,686 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:16:51,687 INFO L195 NwaCegarLoop]: trace histogram [30, 27, 27, 27, 27, 27, 27, 10, 9, 9, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:16:51,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-22 02:16:51,687 INFO L420 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)] === [2022-11-22 02:16:51,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:16:51,688 INFO L85 PathProgramCache]: Analyzing trace with hash -369333653, now seen corresponding path program 1 times [2022-11-22 02:16:51,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:16:51,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102922572] [2022-11-22 02:16:51,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:16:51,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:16:51,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:16:52,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3158 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 3140 trivial. 0 not checked. [2022-11-22 02:16:52,266 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:16:52,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102922572] [2022-11-22 02:16:52,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102922572] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:16:52,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:16:52,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:16:52,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277301106] [2022-11-22 02:16:52,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:16:52,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:16:52,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:16:52,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:16:52,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:16:52,269 INFO L87 Difference]: Start difference. First operand 7796 states and 10946 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (45), 3 states have call predecessors, (45), 1 states have return successors, (43), 2 states have call predecessors, (43), 2 states have call successors, (43) [2022-11-22 02:16:58,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:16:59,719 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:17:00,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:17:00,088 INFO L93 Difference]: Finished difference Result 7802 states and 10951 transitions. [2022-11-22 02:17:00,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:17:00,089 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (45), 3 states have call predecessors, (45), 1 states have return successors, (43), 2 states have call predecessors, (43), 2 states have call successors, (43) Word has length 374 [2022-11-22 02:17:00,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:17:00,111 INFO L225 Difference]: With dead ends: 7802 [2022-11-22 02:17:00,112 INFO L226 Difference]: Without dead ends: 7800 [2022-11-22 02:17:00,115 INFO L412 NwaCegarLoop]: 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 [2022-11-22 02:17:00,115 INFO L413 NwaCegarLoop]: 1871 mSDtfsCounter, 2132 mSDsluCounter, 3720 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2137 SdHoareTripleChecker+Valid, 5591 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:17:00,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2137 Valid, 5591 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1074 Invalid, 1 Unknown, 0 Unchecked, 7.2s Time] [2022-11-22 02:17:00,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7800 states. [2022-11-22 02:17:00,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7800 to 7800. [2022-11-22 02:17:00,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7800 states, 4929 states have (on average 1.3379995942381822) internal successors, (6595), 5111 states have internal predecessors, (6595), 2170 states have call successors, (2170), 702 states have call predecessors, (2170), 698 states have return successors, (2184), 2134 states have call predecessors, (2184), 2166 states have call successors, (2184) [2022-11-22 02:17:00,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7800 states to 7800 states and 10949 transitions. [2022-11-22 02:17:00,838 INFO L78 Accepts]: Start accepts. Automaton has 7800 states and 10949 transitions. Word has length 374 [2022-11-22 02:17:00,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:17:00,839 INFO L495 AbstractCegarLoop]: Abstraction has 7800 states and 10949 transitions. [2022-11-22 02:17:00,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (45), 3 states have call predecessors, (45), 1 states have return successors, (43), 2 states have call predecessors, (43), 2 states have call successors, (43) [2022-11-22 02:17:00,839 INFO L276 IsEmpty]: Start isEmpty. Operand 7800 states and 10949 transitions. [2022-11-22 02:17:00,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2022-11-22 02:17:00,847 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:17:00,847 INFO L195 NwaCegarLoop]: trace histogram [30, 27, 27, 27, 27, 27, 27, 11, 10, 10, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:17:00,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-22 02:17:00,848 INFO L420 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)] === [2022-11-22 02:17:00,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:17:00,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1158625507, now seen corresponding path program 1 times [2022-11-22 02:17:00,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:17:00,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39949410] [2022-11-22 02:17:00,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:00,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:17:00,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:01,426 INFO L134 CoverageAnalysis]: Checked inductivity of 3196 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 3176 trivial. 0 not checked. [2022-11-22 02:17:01,426 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:17:01,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39949410] [2022-11-22 02:17:01,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39949410] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:17:01,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:17:01,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:17:01,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546552321] [2022-11-22 02:17:01,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:17:01,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:17:01,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:17:01,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:17:01,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:17:01,521 INFO L87 Difference]: Start difference. First operand 7800 states and 10949 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (46), 3 states have call predecessors, (46), 1 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) [2022-11-22 02:17:07,664 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:17:09,671 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:17:10,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:17:10,010 INFO L93 Difference]: Finished difference Result 7806 states and 10954 transitions. [2022-11-22 02:17:10,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:17:10,010 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (46), 3 states have call predecessors, (46), 1 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) Word has length 379 [2022-11-22 02:17:10,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:17:10,038 INFO L225 Difference]: With dead ends: 7806 [2022-11-22 02:17:10,038 INFO L226 Difference]: Without dead ends: 7804 [2022-11-22 02:17:10,046 INFO L412 NwaCegarLoop]: 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 [2022-11-22 02:17:10,047 INFO L413 NwaCegarLoop]: 1871 mSDtfsCounter, 2132 mSDsluCounter, 3720 mSDsCounter, 0 mSdLazyCounter, 1073 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2136 SdHoareTripleChecker+Valid, 5591 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1073 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-11-22 02:17:10,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2136 Valid, 5591 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1073 Invalid, 2 Unknown, 0 Unchecked, 7.9s Time] [2022-11-22 02:17:10,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7804 states. [2022-11-22 02:17:10,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7804 to 7804. [2022-11-22 02:17:10,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7804 states, 4932 states have (on average 1.3377939983779399) internal successors, (6598), 5114 states have internal predecessors, (6598), 2170 states have call successors, (2170), 703 states have call predecessors, (2170), 699 states have return successors, (2184), 2134 states have call predecessors, (2184), 2166 states have call successors, (2184) [2022-11-22 02:17:10,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7804 states to 7804 states and 10952 transitions. [2022-11-22 02:17:10,708 INFO L78 Accepts]: Start accepts. Automaton has 7804 states and 10952 transitions. Word has length 379 [2022-11-22 02:17:10,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:17:10,709 INFO L495 AbstractCegarLoop]: Abstraction has 7804 states and 10952 transitions. [2022-11-22 02:17:10,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (46), 3 states have call predecessors, (46), 1 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) [2022-11-22 02:17:10,710 INFO L276 IsEmpty]: Start isEmpty. Operand 7804 states and 10952 transitions. [2022-11-22 02:17:10,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2022-11-22 02:17:10,718 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:17:10,718 INFO L195 NwaCegarLoop]: trace histogram [30, 27, 27, 27, 27, 27, 27, 12, 11, 11, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:17:10,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-22 02:17:10,719 INFO L420 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)] === [2022-11-22 02:17:10,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:17:10,719 INFO L85 PathProgramCache]: Analyzing trace with hash -154884350, now seen corresponding path program 1 times [2022-11-22 02:17:10,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:17:10,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894633242] [2022-11-22 02:17:10,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:10,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:17:10,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:11,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3241 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 3219 trivial. 0 not checked. [2022-11-22 02:17:11,306 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:17:11,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894633242] [2022-11-22 02:17:11,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894633242] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:17:11,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:17:11,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:17:11,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104905905] [2022-11-22 02:17:11,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:17:11,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:17:11,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:17:11,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:17:11,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:17:11,310 INFO L87 Difference]: Start difference. First operand 7804 states and 10952 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (50), 3 states have call predecessors, (50), 1 states have return successors, (48), 2 states have call predecessors, (48), 2 states have call successors, (48) [2022-11-22 02:17:16,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:17:17,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:17:17,424 INFO L93 Difference]: Finished difference Result 7814 states and 10959 transitions. [2022-11-22 02:17:17,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:17:17,426 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (50), 3 states have call predecessors, (50), 1 states have return successors, (48), 2 states have call predecessors, (48), 2 states have call successors, (48) Word has length 390 [2022-11-22 02:17:17,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:17:17,450 INFO L225 Difference]: With dead ends: 7814 [2022-11-22 02:17:17,450 INFO L226 Difference]: Without dead ends: 7812 [2022-11-22 02:17:17,456 INFO L412 NwaCegarLoop]: 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 [2022-11-22 02:17:17,456 INFO L413 NwaCegarLoop]: 1934 mSDtfsCounter, 1980 mSDsluCounter, 4184 mSDsCounter, 0 mSdLazyCounter, 1162 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1985 SdHoareTripleChecker+Valid, 6118 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1162 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:17:17,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1985 Valid, 6118 Invalid, 1164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1162 Invalid, 1 Unknown, 0 Unchecked, 5.4s Time] [2022-11-22 02:17:17,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7812 states. [2022-11-22 02:17:18,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7812 to 7808. [2022-11-22 02:17:18,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7808 states, 4935 states have (on average 1.3375886524822695) internal successors, (6601), 5117 states have internal predecessors, (6601), 2170 states have call successors, (2170), 704 states have call predecessors, (2170), 700 states have return successors, (2184), 2134 states have call predecessors, (2184), 2166 states have call successors, (2184) [2022-11-22 02:17:18,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7808 states to 7808 states and 10955 transitions. [2022-11-22 02:17:18,133 INFO L78 Accepts]: Start accepts. Automaton has 7808 states and 10955 transitions. Word has length 390 [2022-11-22 02:17:18,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:17:18,133 INFO L495 AbstractCegarLoop]: Abstraction has 7808 states and 10955 transitions. [2022-11-22 02:17:18,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (50), 3 states have call predecessors, (50), 1 states have return successors, (48), 2 states have call predecessors, (48), 2 states have call successors, (48) [2022-11-22 02:17:18,134 INFO L276 IsEmpty]: Start isEmpty. Operand 7808 states and 10955 transitions. [2022-11-22 02:17:18,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2022-11-22 02:17:18,142 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:17:18,143 INFO L195 NwaCegarLoop]: trace histogram [30, 27, 27, 27, 27, 27, 27, 13, 12, 12, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:17:18,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-22 02:17:18,143 INFO L420 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)] === [2022-11-22 02:17:18,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:17:18,144 INFO L85 PathProgramCache]: Analyzing trace with hash -2002772067, now seen corresponding path program 1 times [2022-11-22 02:17:18,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:17:18,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663747705] [2022-11-22 02:17:18,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:18,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:17:18,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:18,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3284 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 3260 trivial. 0 not checked. [2022-11-22 02:17:18,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:17:18,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663747705] [2022-11-22 02:17:18,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663747705] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:17:18,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:17:18,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:17:18,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737732054] [2022-11-22 02:17:18,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:17:18,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:17:18,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:17:18,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:17:18,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:17:18,699 INFO L87 Difference]: Start difference. First operand 7808 states and 10955 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (48), 3 states have call predecessors, (48), 1 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) [2022-11-22 02:17:25,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:17:26,667 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:17:26,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:17:26,991 INFO L93 Difference]: Finished difference Result 7814 states and 10960 transitions. [2022-11-22 02:17:26,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:17:26,991 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (48), 3 states have call predecessors, (48), 1 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) Word has length 389 [2022-11-22 02:17:26,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:17:27,015 INFO L225 Difference]: With dead ends: 7814 [2022-11-22 02:17:27,015 INFO L226 Difference]: Without dead ends: 7812 [2022-11-22 02:17:27,020 INFO L412 NwaCegarLoop]: 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 [2022-11-22 02:17:27,020 INFO L413 NwaCegarLoop]: 1871 mSDtfsCounter, 2132 mSDsluCounter, 3720 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2134 SdHoareTripleChecker+Valid, 5591 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:17:27,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2134 Valid, 5591 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1074 Invalid, 1 Unknown, 0 Unchecked, 7.6s Time] [2022-11-22 02:17:27,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7812 states. [2022-11-22 02:17:27,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7812 to 7812. [2022-11-22 02:17:27,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7812 states, 4938 states have (on average 1.3373835560955853) internal successors, (6604), 5120 states have internal predecessors, (6604), 2170 states have call successors, (2170), 705 states have call predecessors, (2170), 701 states have return successors, (2184), 2134 states have call predecessors, (2184), 2166 states have call successors, (2184) [2022-11-22 02:17:27,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7812 states to 7812 states and 10958 transitions. [2022-11-22 02:17:27,727 INFO L78 Accepts]: Start accepts. Automaton has 7812 states and 10958 transitions. Word has length 389 [2022-11-22 02:17:27,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:17:27,728 INFO L495 AbstractCegarLoop]: Abstraction has 7812 states and 10958 transitions. [2022-11-22 02:17:27,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (48), 3 states have call predecessors, (48), 1 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) [2022-11-22 02:17:27,728 INFO L276 IsEmpty]: Start isEmpty. Operand 7812 states and 10958 transitions. [2022-11-22 02:17:27,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2022-11-22 02:17:27,736 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:17:27,736 INFO L195 NwaCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 28, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:17:27,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-22 02:17:27,737 INFO L420 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)] === [2022-11-22 02:17:27,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:17:27,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1616682341, now seen corresponding path program 1 times [2022-11-22 02:17:27,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:17:27,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016425174] [2022-11-22 02:17:27,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:27,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:17:27,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:28,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3106 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3106 trivial. 0 not checked. [2022-11-22 02:17:28,141 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:17:28,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016425174] [2022-11-22 02:17:28,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016425174] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:17:28,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:17:28,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:17:28,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628497218] [2022-11-22 02:17:28,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:17:28,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:17:28,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:17:28,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:17:28,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:17:28,144 INFO L87 Difference]: Start difference. First operand 7812 states and 10958 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 3 states have call successors, (47), 2 states have call predecessors, (47), 1 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2022-11-22 02:17:33,519 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:17:34,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:17:34,511 INFO L93 Difference]: Finished difference Result 18952 states and 26552 transitions. [2022-11-22 02:17:34,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:17:34,518 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 3 states have call successors, (47), 2 states have call predecessors, (47), 1 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) Word has length 405 [2022-11-22 02:17:34,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:17:34,544 INFO L225 Difference]: With dead ends: 18952 [2022-11-22 02:17:34,544 INFO L226 Difference]: Without dead ends: 11195 [2022-11-22 02:17:34,568 INFO L412 NwaCegarLoop]: 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 [2022-11-22 02:17:34,568 INFO L413 NwaCegarLoop]: 2629 mSDtfsCounter, 2031 mSDsluCounter, 1848 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2031 SdHoareTripleChecker+Valid, 4477 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:17:34,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2031 Valid, 4477 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 815 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-11-22 02:17:34,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11195 states. [2022-11-22 02:17:35,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11195 to 11103. [2022-11-22 02:17:35,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11103 states, 7023 states have (on average 1.3388865157340168) internal successors, (9403), 7313 states have internal predecessors, (9403), 3045 states have call successors, (3045), 1039 states have call predecessors, (3045), 1032 states have return successors, (3068), 2966 states have call predecessors, (3068), 3041 states have call successors, (3068) [2022-11-22 02:17:35,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11103 states to 11103 states and 15516 transitions. [2022-11-22 02:17:35,650 INFO L78 Accepts]: Start accepts. Automaton has 11103 states and 15516 transitions. Word has length 405 [2022-11-22 02:17:35,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:17:35,651 INFO L495 AbstractCegarLoop]: Abstraction has 11103 states and 15516 transitions. [2022-11-22 02:17:35,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 3 states have call successors, (47), 2 states have call predecessors, (47), 1 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2022-11-22 02:17:35,651 INFO L276 IsEmpty]: Start isEmpty. Operand 11103 states and 15516 transitions. [2022-11-22 02:17:35,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2022-11-22 02:17:35,658 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:17:35,658 INFO L195 NwaCegarLoop]: trace histogram [30, 27, 27, 27, 27, 27, 27, 14, 13, 13, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:17:35,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-22 02:17:35,659 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-22 02:17:35,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:17:35,659 INFO L85 PathProgramCache]: Analyzing trace with hash 435032241, now seen corresponding path program 1 times [2022-11-22 02:17:35,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:17:35,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595162838] [2022-11-22 02:17:35,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:35,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:17:35,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:36,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3336 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 3310 trivial. 0 not checked. [2022-11-22 02:17:36,299 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:17:36,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595162838] [2022-11-22 02:17:36,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595162838] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:17:36,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:17:36,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:17:36,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997322244] [2022-11-22 02:17:36,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:17:36,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:17:36,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:17:36,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:17:36,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:17:36,304 INFO L87 Difference]: Start difference. First operand 11103 states and 15516 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (52), 3 states have call predecessors, (52), 1 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) [2022-11-22 02:17:42,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:17:43,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:17:43,945 INFO L93 Difference]: Finished difference Result 11109 states and 15521 transitions. [2022-11-22 02:17:43,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:17:43,946 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (52), 3 states have call predecessors, (52), 1 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) Word has length 399 [2022-11-22 02:17:43,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:17:43,970 INFO L225 Difference]: With dead ends: 11109 [2022-11-22 02:17:43,970 INFO L226 Difference]: Without dead ends: 11105 [2022-11-22 02:17:43,974 INFO L412 NwaCegarLoop]: 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 [2022-11-22 02:17:43,974 INFO L413 NwaCegarLoop]: 1871 mSDtfsCounter, 2131 mSDsluCounter, 3720 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2132 SdHoareTripleChecker+Valid, 5591 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:17:43,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2132 Valid, 5591 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1074 Invalid, 1 Unknown, 0 Unchecked, 6.6s Time] [2022-11-22 02:17:43,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11105 states. [2022-11-22 02:17:44,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11105 to 11105. [2022-11-22 02:17:44,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11105 states, 7025 states have (on average 1.3386476868327402) internal successors, (9404), 7314 states have internal predecessors, (9404), 3045 states have call successors, (3045), 1040 states have call predecessors, (3045), 1032 states have return successors, (3068), 2966 states have call predecessors, (3068), 3041 states have call successors, (3068) [2022-11-22 02:17:44,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11105 states to 11105 states and 15517 transitions. [2022-11-22 02:17:44,926 INFO L78 Accepts]: Start accepts. Automaton has 11105 states and 15517 transitions. Word has length 399 [2022-11-22 02:17:44,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:17:44,927 INFO L495 AbstractCegarLoop]: Abstraction has 11105 states and 15517 transitions. [2022-11-22 02:17:44,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (52), 3 states have call predecessors, (52), 1 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) [2022-11-22 02:17:44,927 INFO L276 IsEmpty]: Start isEmpty. Operand 11105 states and 15517 transitions. [2022-11-22 02:17:44,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2022-11-22 02:17:44,934 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:17:44,935 INFO L195 NwaCegarLoop]: trace histogram [30, 27, 27, 27, 27, 27, 27, 15, 14, 14, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:17:44,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-22 02:17:44,935 INFO L420 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)] === [2022-11-22 02:17:44,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:17:44,936 INFO L85 PathProgramCache]: Analyzing trace with hash 2043447325, now seen corresponding path program 1 times [2022-11-22 02:17:44,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:17:44,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860465508] [2022-11-22 02:17:44,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:44,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:17:45,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:45,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3388 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 3360 trivial. 0 not checked. [2022-11-22 02:17:45,514 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:17:45,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860465508] [2022-11-22 02:17:45,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860465508] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:17:45,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:17:45,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:17:45,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492085820] [2022-11-22 02:17:45,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:17:45,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:17:45,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:17:45,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:17:45,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:17:45,516 INFO L87 Difference]: Start difference. First operand 11105 states and 15517 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (50), 3 states have call predecessors, (50), 1 states have return successors, (48), 2 states have call predecessors, (48), 2 states have call successors, (48) [2022-11-22 02:17:53,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:17:53,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:17:53,631 INFO L93 Difference]: Finished difference Result 11105 states and 15517 transitions. [2022-11-22 02:17:53,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:17:53,632 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (50), 3 states have call predecessors, (50), 1 states have return successors, (48), 2 states have call predecessors, (48), 2 states have call successors, (48) Word has length 399 [2022-11-22 02:17:53,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:17:53,664 INFO L225 Difference]: With dead ends: 11105 [2022-11-22 02:17:53,665 INFO L226 Difference]: Without dead ends: 10919 [2022-11-22 02:17:53,669 INFO L412 NwaCegarLoop]: 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 [2022-11-22 02:17:53,670 INFO L413 NwaCegarLoop]: 1869 mSDtfsCounter, 2128 mSDsluCounter, 3719 mSDsCounter, 0 mSdLazyCounter, 1069 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2128 SdHoareTripleChecker+Valid, 5588 SdHoareTripleChecker+Invalid, 1071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1069 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:17:53,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2128 Valid, 5588 Invalid, 1071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1069 Invalid, 1 Unknown, 0 Unchecked, 7.0s Time] [2022-11-22 02:17:53,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10919 states. [2022-11-22 02:17:54,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10919 to 10919. [2022-11-22 02:17:54,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10919 states, 6956 states have (on average 1.3368315123634273) internal successors, (9299), 7209 states have internal predecessors, (9299), 2951 states have call successors, (2951), 1008 states have call predecessors, (2951), 1010 states have return successors, (2978), 2917 states have call predecessors, (2978), 2951 states have call successors, (2978) [2022-11-22 02:17:54,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10919 states to 10919 states and 15228 transitions. [2022-11-22 02:17:54,822 INFO L78 Accepts]: Start accepts. Automaton has 10919 states and 15228 transitions. Word has length 399 [2022-11-22 02:17:54,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:17:54,823 INFO L495 AbstractCegarLoop]: Abstraction has 10919 states and 15228 transitions. [2022-11-22 02:17:54,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (50), 3 states have call predecessors, (50), 1 states have return successors, (48), 2 states have call predecessors, (48), 2 states have call successors, (48) [2022-11-22 02:17:54,823 INFO L276 IsEmpty]: Start isEmpty. Operand 10919 states and 15228 transitions. [2022-11-22 02:17:54,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2022-11-22 02:17:54,830 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:17:54,831 INFO L195 NwaCegarLoop]: trace histogram [34, 27, 27, 27, 27, 27, 27, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:17:54,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-22 02:17:54,831 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-22 02:17:54,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:17:54,832 INFO L85 PathProgramCache]: Analyzing trace with hash 2075223031, now seen corresponding path program 1 times [2022-11-22 02:17:54,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:17:54,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498624018] [2022-11-22 02:17:54,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:54,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:17:54,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:55,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3530 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3530 trivial. 0 not checked. [2022-11-22 02:17:55,894 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:17:55,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498624018] [2022-11-22 02:17:55,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498624018] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:17:55,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:17:55,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:17:55,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392596414] [2022-11-22 02:17:55,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:17:55,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:17:55,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:17:55,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:17:55,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:17:55,898 INFO L87 Difference]: Start difference. First operand 10919 states and 15228 transitions. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (54), 3 states have call predecessors, (54), 1 states have return successors, (51), 2 states have call predecessors, (51), 2 states have call successors, (51) [2022-11-22 02:18:02,036 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:18:04,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:18:05,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:18:05,395 INFO L93 Difference]: Finished difference Result 10919 states and 15228 transitions. [2022-11-22 02:18:05,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:18:05,396 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (54), 3 states have call predecessors, (54), 1 states have return successors, (51), 2 states have call predecessors, (51), 2 states have call successors, (51) Word has length 461 [2022-11-22 02:18:05,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:18:05,435 INFO L225 Difference]: With dead ends: 10919 [2022-11-22 02:18:05,435 INFO L226 Difference]: Without dead ends: 10917 [2022-11-22 02:18:05,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:18:05,441 INFO L413 NwaCegarLoop]: 1846 mSDtfsCounter, 1933 mSDsluCounter, 3862 mSDsCounter, 0 mSdLazyCounter, 1096 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1934 SdHoareTripleChecker+Valid, 5708 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:18:05,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1934 Valid, 5708 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1096 Invalid, 0 Unknown, 0 Unchecked, 8.5s Time] [2022-11-22 02:18:05,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10917 states. [2022-11-22 02:18:06,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10917 to 10917. [2022-11-22 02:18:06,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10917 states, 6955 states have (on average 1.3351545650611072) internal successors, (9286), 7207 states have internal predecessors, (9286), 2951 states have call successors, (2951), 1008 states have call predecessors, (2951), 1010 states have return successors, (2978), 2917 states have call predecessors, (2978), 2951 states have call successors, (2978) [2022-11-22 02:18:06,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10917 states to 10917 states and 15215 transitions. [2022-11-22 02:18:06,395 INFO L78 Accepts]: Start accepts. Automaton has 10917 states and 15215 transitions. Word has length 461 [2022-11-22 02:18:06,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:18:06,396 INFO L495 AbstractCegarLoop]: Abstraction has 10917 states and 15215 transitions. [2022-11-22 02:18:06,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (54), 3 states have call predecessors, (54), 1 states have return successors, (51), 2 states have call predecessors, (51), 2 states have call successors, (51) [2022-11-22 02:18:06,396 INFO L276 IsEmpty]: Start isEmpty. Operand 10917 states and 15215 transitions. [2022-11-22 02:18:06,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2022-11-22 02:18:06,408 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:18:06,408 INFO L195 NwaCegarLoop]: trace histogram [34, 27, 27, 27, 27, 27, 27, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:18:06,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-22 02:18:06,409 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-22 02:18:06,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:18:06,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1755768851, now seen corresponding path program 1 times [2022-11-22 02:18:06,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:18:06,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142101632] [2022-11-22 02:18:06,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:18:06,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:18:06,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:18:06,911 INFO L134 CoverageAnalysis]: Checked inductivity of 3569 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3569 trivial. 0 not checked. [2022-11-22 02:18:06,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:18:06,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142101632] [2022-11-22 02:18:06,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142101632] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:18:06,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:18:06,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:18:06,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924128648] [2022-11-22 02:18:06,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:18:06,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:18:06,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:18:06,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:18:06,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:18:06,919 INFO L87 Difference]: Start difference. First operand 10917 states and 15215 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 2 states have call successors, (57), 2 states have call predecessors, (57), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) [2022-11-22 02:18:12,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:18:13,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:18:13,287 INFO L93 Difference]: Finished difference Result 21611 states and 30143 transitions. [2022-11-22 02:18:13,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:18:13,290 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 2 states have call successors, (57), 2 states have call predecessors, (57), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) Word has length 476 [2022-11-22 02:18:13,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:18:13,325 INFO L225 Difference]: With dead ends: 21611 [2022-11-22 02:18:13,325 INFO L226 Difference]: Without dead ends: 10937 [2022-11-22 02:18:13,348 INFO L412 NwaCegarLoop]: 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 [2022-11-22 02:18:13,349 INFO L413 NwaCegarLoop]: 1815 mSDtfsCounter, 5 mSDsluCounter, 1811 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 3626 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:18:13,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 3626 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-11-22 02:18:13,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10937 states. [2022-11-22 02:18:14,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10937 to 10921. [2022-11-22 02:18:14,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10921 states, 6959 states have (on average 1.3349619198160656) internal successors, (9290), 7211 states have internal predecessors, (9290), 2951 states have call successors, (2951), 1008 states have call predecessors, (2951), 1010 states have return successors, (2978), 2917 states have call predecessors, (2978), 2951 states have call successors, (2978) [2022-11-22 02:18:14,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10921 states to 10921 states and 15219 transitions. [2022-11-22 02:18:14,437 INFO L78 Accepts]: Start accepts. Automaton has 10921 states and 15219 transitions. Word has length 476 [2022-11-22 02:18:14,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:18:14,438 INFO L495 AbstractCegarLoop]: Abstraction has 10921 states and 15219 transitions. [2022-11-22 02:18:14,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 2 states have call successors, (57), 2 states have call predecessors, (57), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) [2022-11-22 02:18:14,438 INFO L276 IsEmpty]: Start isEmpty. Operand 10921 states and 15219 transitions. [2022-11-22 02:18:14,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2022-11-22 02:18:14,456 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:18:14,456 INFO L195 NwaCegarLoop]: trace histogram [34, 27, 27, 27, 27, 27, 27, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:18:14,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-22 02:18:14,457 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-22 02:18:14,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:18:14,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1450174438, now seen corresponding path program 1 times [2022-11-22 02:18:14,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:18:14,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486360964] [2022-11-22 02:18:14,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:18:14,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:18:14,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:18:15,065 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3569 trivial. 0 not checked. [2022-11-22 02:18:15,066 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:18:15,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486360964] [2022-11-22 02:18:15,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486360964] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:18:15,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846395579] [2022-11-22 02:18:15,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:18:15,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:18:15,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d7e30b-6ac3-4e3f-9c21-32308d07c881/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:18:15,070 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d7e30b-6ac3-4e3f-9c21-32308d07c881/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:18:15,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d7e30b-6ac3-4e3f-9c21-32308d07c881/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 02:18:16,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:18:16,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 4426 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 02:18:16,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:18:16,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3569 trivial. 0 not checked. [2022-11-22 02:18:16,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:18:17,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3569 trivial. 0 not checked. [2022-11-22 02:18:17,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846395579] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:18:17,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [733658743] [2022-11-22 02:18:17,154 INFO L159 IcfgInterpreter]: Started Sifa with 179 locations of interest [2022-11-22 02:18:17,155 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:18:17,158 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:18:17,162 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:18:17,163 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs