./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 5e519f3a 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_e1d1a92c-2ccf-4b64-92fd-2cddd804ec31/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d1a92c-2ccf-4b64-92fd-2cddd804ec31/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d1a92c-2ccf-4b64-92fd-2cddd804ec31/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d1a92c-2ccf-4b64-92fd-2cddd804ec31/bin/utaipan-7li7fVZpFI/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_e1d1a92c-2ccf-4b64-92fd-2cddd804ec31/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d1a92c-2ccf-4b64-92fd-2cddd804ec31/bin/utaipan-7li7fVZpFI --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-5e519f3 [2022-11-03 02:11:46,960 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:11:46,963 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:11:47,014 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:11:47,015 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:11:47,019 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:11:47,022 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:11:47,025 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:11:47,027 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:11:47,034 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:11:47,035 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:11:47,038 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:11:47,038 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:11:47,041 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:11:47,042 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:11:47,046 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:11:47,049 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:11:47,050 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:11:47,052 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:11:47,058 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:11:47,060 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:11:47,061 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:11:47,064 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:11:47,065 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:11:47,070 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:11:47,070 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:11:47,071 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:11:47,073 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:11:47,074 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:11:47,075 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:11:47,075 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:11:47,076 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:11:47,078 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:11:47,080 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:11:47,081 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:11:47,081 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:11:47,082 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:11:47,082 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:11:47,083 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:11:47,084 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:11:47,084 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:11:47,085 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d1a92c-2ccf-4b64-92fd-2cddd804ec31/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:11:47,128 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:11:47,128 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:11:47,129 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:11:47,129 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:11:47,130 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:11:47,130 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:11:47,131 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:11:47,131 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:11:47,131 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:11:47,131 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:11:47,132 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:11:47,133 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:11:47,133 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:11:47,133 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:11:47,133 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:11:47,134 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:11:47,134 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:11:47,134 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:11:47,135 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:11:47,135 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:11:47,135 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:11:47,136 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:11:47,136 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:11:47,136 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:11:47,136 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:11:47,137 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:11:47,137 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:11:47,137 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:11:47,137 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:11:47,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:11:47,138 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:11:47,138 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:11:47,139 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:11:47,139 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:11:47,139 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:11:47,139 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:11:47,140 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:11:47,140 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:11:47,140 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_e1d1a92c-2ccf-4b64-92fd-2cddd804ec31/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d1a92c-2ccf-4b64-92fd-2cddd804ec31/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 97cecdf2f398250e9c44f19d8d35ed7fcac528daa12758af85552fae0658b596 [2022-11-03 02:11:47,429 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:11:47,450 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:11:47,452 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:11:47,454 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:11:47,454 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:11:47,456 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d1a92c-2ccf-4b64-92fd-2cddd804ec31/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-tun.cil.i [2022-11-03 02:11:47,531 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d1a92c-2ccf-4b64-92fd-2cddd804ec31/bin/utaipan-7li7fVZpFI/data/a9ab4f1f7/9dce2faf1e474490ba1ed90b08adf400/FLAG56c614426 [2022-11-03 02:11:48,528 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:11:48,529 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d1a92c-2ccf-4b64-92fd-2cddd804ec31/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-tun.cil.i [2022-11-03 02:11:48,603 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d1a92c-2ccf-4b64-92fd-2cddd804ec31/bin/utaipan-7li7fVZpFI/data/a9ab4f1f7/9dce2faf1e474490ba1ed90b08adf400/FLAG56c614426 [2022-11-03 02:11:49,018 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d1a92c-2ccf-4b64-92fd-2cddd804ec31/bin/utaipan-7li7fVZpFI/data/a9ab4f1f7/9dce2faf1e474490ba1ed90b08adf400 [2022-11-03 02:11:49,021 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:11:49,023 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:11:49,024 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:11:49,025 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:11:49,028 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:11:49,029 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:11:49" (1/1) ... [2022-11-03 02:11:49,030 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43548849 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:11:49, skipping insertion in model container [2022-11-03 02:11:49,031 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:11:49" (1/1) ... [2022-11-03 02:11:49,038 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:11:49,222 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:11:53,434 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d1a92c-2ccf-4b64-92fd-2cddd804ec31/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-tun.cil.i[428896,428909] [2022-11-03 02:11:53,437 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d1a92c-2ccf-4b64-92fd-2cddd804ec31/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-tun.cil.i[429065,429078] [2022-11-03 02:11:53,438 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d1a92c-2ccf-4b64-92fd-2cddd804ec31/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-tun.cil.i[429232,429245] [2022-11-03 02:11:53,438 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d1a92c-2ccf-4b64-92fd-2cddd804ec31/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-tun.cil.i[429400,429413] [2022-11-03 02:11:53,486 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:11:53,532 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:11:54,168 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d1a92c-2ccf-4b64-92fd-2cddd804ec31/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-tun.cil.i[428896,428909] [2022-11-03 02:11:54,170 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d1a92c-2ccf-4b64-92fd-2cddd804ec31/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-tun.cil.i[429065,429078] [2022-11-03 02:11:54,170 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d1a92c-2ccf-4b64-92fd-2cddd804ec31/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-tun.cil.i[429232,429245] [2022-11-03 02:11:54,171 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d1a92c-2ccf-4b64-92fd-2cddd804ec31/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-tun.cil.i[429400,429413] [2022-11-03 02:11:54,183 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:11:54,528 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:11:54,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:11:54 WrapperNode [2022-11-03 02:11:54,529 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:11:54,530 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:11:54,530 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:11:54,530 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:11:54,541 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:11:54" (1/1) ... [2022-11-03 02:11:54,666 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:11:54" (1/1) ... [2022-11-03 02:11:54,909 INFO L138 Inliner]: procedures = 614, calls = 2613, calls flagged for inlining = 322, calls inlined = 255, statements flattened = 7165 [2022-11-03 02:11:54,910 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:11:54,911 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:11:54,911 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:11:54,912 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:11:54,972 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:11:54" (1/1) ... [2022-11-03 02:11:54,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:11:54" (1/1) ... [2022-11-03 02:11:55,019 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:11:54" (1/1) ... [2022-11-03 02:11:55,019 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:11:54" (1/1) ... [2022-11-03 02:11:55,163 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:11:54" (1/1) ... [2022-11-03 02:11:55,185 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:11:54" (1/1) ... [2022-11-03 02:11:55,213 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:11:54" (1/1) ... [2022-11-03 02:11:55,226 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:11:54" (1/1) ... [2022-11-03 02:11:55,261 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:11:55,262 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:11:55,262 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:11:55,262 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:11:55,263 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:11:54" (1/1) ... [2022-11-03 02:11:55,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:11:55,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d1a92c-2ccf-4b64-92fd-2cddd804ec31/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:11:55,291 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d1a92c-2ccf-4b64-92fd-2cddd804ec31/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:11:55,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d1a92c-2ccf-4b64-92fd-2cddd804ec31/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:11:55,332 INFO L130 BoogieDeclarations]: Found specification of procedure tun_get [2022-11-03 02:11:55,333 INFO L138 BoogieDeclarations]: Found implementation of procedure tun_get [2022-11-03 02:11:55,333 INFO L130 BoogieDeclarations]: Found specification of procedure debug_lockdep_rcu_enabled [2022-11-03 02:11:55,333 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_lockdep_rcu_enabled [2022-11-03 02:11:55,333 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-03 02:11:55,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-03 02:11:55,333 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2022-11-03 02:11:55,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2022-11-03 02:11:55,334 INFO L130 BoogieDeclarations]: Found specification of procedure skb_get_hash [2022-11-03 02:11:55,334 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_get_hash [2022-11-03 02:11:55,334 INFO L130 BoogieDeclarations]: Found specification of procedure tun_attach [2022-11-03 02:11:55,334 INFO L138 BoogieDeclarations]: Found implementation of procedure tun_attach [2022-11-03 02:11:55,334 INFO L130 BoogieDeclarations]: Found specification of procedure ns_capable [2022-11-03 02:11:55,334 INFO L138 BoogieDeclarations]: Found implementation of procedure ns_capable [2022-11-03 02:11:55,334 INFO L130 BoogieDeclarations]: Found specification of procedure crc32_le [2022-11-03 02:11:55,334 INFO L138 BoogieDeclarations]: Found implementation of procedure crc32_le [2022-11-03 02:11:55,335 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2022-11-03 02:11:55,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2022-11-03 02:11:55,335 INFO L130 BoogieDeclarations]: Found specification of procedure gid_valid [2022-11-03 02:11:55,335 INFO L138 BoogieDeclarations]: Found implementation of procedure gid_valid [2022-11-03 02:11:55,335 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec_and_test [2022-11-03 02:11:55,335 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec_and_test [2022-11-03 02:11:55,335 INFO L130 BoogieDeclarations]: Found specification of procedure skb_end_pointer [2022-11-03 02:11:55,335 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_end_pointer [2022-11-03 02:11:55,336 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2022-11-03 02:11:55,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2022-11-03 02:11:55,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:11:55,336 INFO L130 BoogieDeclarations]: Found specification of procedure sock_writeable [2022-11-03 02:11:55,336 INFO L138 BoogieDeclarations]: Found implementation of procedure sock_writeable [2022-11-03 02:11:55,336 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-03 02:11:55,336 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-03 02:11:55,336 INFO L130 BoogieDeclarations]: Found specification of procedure iov_length [2022-11-03 02:11:55,337 INFO L138 BoogieDeclarations]: Found implementation of procedure iov_length [2022-11-03 02:11:55,337 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-11-03 02:11:55,337 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-11-03 02:11:55,337 INFO L130 BoogieDeclarations]: Found specification of procedure sock_put [2022-11-03 02:11:55,337 INFO L138 BoogieDeclarations]: Found implementation of procedure sock_put [2022-11-03 02:11:55,337 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-03 02:11:55,337 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2022-11-03 02:11:55,337 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2022-11-03 02:11:55,338 INFO L130 BoogieDeclarations]: Found specification of procedure tun_get_iff [2022-11-03 02:11:55,338 INFO L138 BoogieDeclarations]: Found implementation of procedure tun_get_iff [2022-11-03 02:11:55,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-03 02:11:55,338 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_bh_76 [2022-11-03 02:11:55,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_bh_76 [2022-11-03 02:11:55,338 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2022-11-03 02:11:55,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2022-11-03 02:11:55,338 INFO L130 BoogieDeclarations]: Found specification of procedure __tun_detach [2022-11-03 02:11:55,338 INFO L138 BoogieDeclarations]: Found implementation of procedure __tun_detach [2022-11-03 02:11:55,339 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 02:11:55,339 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-03 02:11:55,339 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-03 02:11:55,339 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_EMGentry_exit_tun_cleanup_15_2 [2022-11-03 02:11:55,339 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_EMGentry_exit_tun_cleanup_15_2 [2022-11-03 02:11:55,339 INFO L130 BoogieDeclarations]: Found specification of procedure tun_detach_all [2022-11-03 02:11:55,339 INFO L138 BoogieDeclarations]: Found implementation of procedure tun_detach_all [2022-11-03 02:11:55,339 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_is_watching [2022-11-03 02:11:55,340 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_is_watching [2022-11-03 02:11:55,340 INFO L130 BoogieDeclarations]: Found specification of procedure skb_queue_purge [2022-11-03 02:11:55,340 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_queue_purge [2022-11-03 02:11:55,340 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2022-11-03 02:11:55,340 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2022-11-03 02:11:55,340 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock [2022-11-03 02:11:55,340 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock [2022-11-03 02:11:55,340 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2022-11-03 02:11:55,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2022-11-03 02:11:55,341 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:11:55,341 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_0 [2022-11-03 02:11:55,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_0 [2022-11-03 02:11:55,341 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_2 [2022-11-03 02:11:55,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_2 [2022-11-03 02:11:55,341 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mod_timer [2022-11-03 02:11:55,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mod_timer [2022-11-03 02:11:55,341 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:11:55,342 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2022-11-03 02:11:55,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2022-11-03 02:11:55,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 02:11:55,342 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-11-03 02:11:55,342 INFO L130 BoogieDeclarations]: Found specification of procedure read_pnet [2022-11-03 02:11:55,342 INFO L138 BoogieDeclarations]: Found implementation of procedure read_pnet [2022-11-03 02:11:55,342 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2022-11-03 02:11:55,342 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2022-11-03 02:11:55,343 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2022-11-03 02:11:55,343 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2022-11-03 02:11:55,343 INFO L130 BoogieDeclarations]: Found specification of procedure tun_setup [2022-11-03 02:11:55,343 INFO L138 BoogieDeclarations]: Found implementation of procedure tun_setup [2022-11-03 02:11:55,343 INFO L130 BoogieDeclarations]: Found specification of procedure skb_set_transport_header [2022-11-03 02:11:55,343 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_set_transport_header [2022-11-03 02:11:55,343 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2022-11-03 02:11:55,343 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2022-11-03 02:11:55,343 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2022-11-03 02:11:55,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2022-11-03 02:11:55,344 INFO L130 BoogieDeclarations]: Found specification of procedure tun_flow_find [2022-11-03 02:11:55,344 INFO L138 BoogieDeclarations]: Found implementation of procedure tun_flow_find [2022-11-03 02:11:55,344 INFO L130 BoogieDeclarations]: Found specification of procedure tun_flow_uninit [2022-11-03 02:11:55,344 INFO L138 BoogieDeclarations]: Found implementation of procedure tun_flow_uninit [2022-11-03 02:11:55,344 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2022-11-03 02:11:55,344 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2022-11-03 02:11:55,344 INFO L130 BoogieDeclarations]: Found specification of procedure synchronize_net [2022-11-03 02:11:55,345 INFO L138 BoogieDeclarations]: Found implementation of procedure synchronize_net [2022-11-03 02:11:55,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:11:55,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:11:55,345 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_toiovecend [2022-11-03 02:11:55,345 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_toiovecend [2022-11-03 02:11:55,345 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2022-11-03 02:11:55,345 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2022-11-03 02:11:55,345 INFO L130 BoogieDeclarations]: Found specification of procedure tun_flags [2022-11-03 02:11:55,345 INFO L138 BoogieDeclarations]: Found implementation of procedure tun_flags [2022-11-03 02:11:55,346 INFO L130 BoogieDeclarations]: Found specification of procedure __kuid_val [2022-11-03 02:11:55,346 INFO L138 BoogieDeclarations]: Found implementation of procedure __kuid_val [2022-11-03 02:11:55,346 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-03 02:11:55,346 INFO L130 BoogieDeclarations]: Found specification of procedure uid_valid [2022-11-03 02:11:55,346 INFO L138 BoogieDeclarations]: Found implementation of procedure uid_valid [2022-11-03 02:11:55,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-03 02:11:55,346 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-03 02:11:55,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-03 02:11:55,346 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2022-11-03 02:11:55,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2022-11-03 02:11:55,347 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2022-11-03 02:11:55,347 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2022-11-03 02:11:55,347 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_size_call_parameter [2022-11-03 02:11:55,347 INFO L130 BoogieDeclarations]: Found specification of procedure rtnl_unlock [2022-11-03 02:11:55,347 INFO L138 BoogieDeclarations]: Found implementation of procedure rtnl_unlock [2022-11-03 02:11:55,347 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_rtnl_is_held [2022-11-03 02:11:55,347 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_rtnl_is_held [2022-11-03 02:11:55,347 INFO L130 BoogieDeclarations]: Found specification of procedure device_create_file [2022-11-03 02:11:55,348 INFO L138 BoogieDeclarations]: Found implementation of procedure device_create_file [2022-11-03 02:11:55,348 INFO L130 BoogieDeclarations]: Found specification of procedure bitrev32 [2022-11-03 02:11:55,348 INFO L138 BoogieDeclarations]: Found implementation of procedure bitrev32 [2022-11-03 02:11:55,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-03 02:11:55,348 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-03 02:11:55,348 INFO L130 BoogieDeclarations]: Found specification of procedure __tun_get [2022-11-03 02:11:55,348 INFO L138 BoogieDeclarations]: Found implementation of procedure __tun_get [2022-11-03 02:11:55,348 INFO L130 BoogieDeclarations]: Found specification of procedure ERR_PTR [2022-11-03 02:11:55,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ERR_PTR [2022-11-03 02:11:55,349 INFO L130 BoogieDeclarations]: Found specification of procedure sk_attach_filter [2022-11-03 02:11:55,349 INFO L138 BoogieDeclarations]: Found implementation of procedure sk_attach_filter [2022-11-03 02:11:55,349 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:11:55,349 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2022-11-03 02:11:55,349 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2022-11-03 02:11:55,349 INFO L130 BoogieDeclarations]: Found specification of procedure module_put [2022-11-03 02:11:55,349 INFO L138 BoogieDeclarations]: Found implementation of procedure module_put [2022-11-03 02:11:55,349 INFO L130 BoogieDeclarations]: Found specification of procedure put_net [2022-11-03 02:11:55,349 INFO L138 BoogieDeclarations]: Found implementation of procedure put_net [2022-11-03 02:11:55,350 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 02:11:55,350 INFO L130 BoogieDeclarations]: Found specification of procedure skb_copy_datagram_const_iovec [2022-11-03 02:11:55,350 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_copy_datagram_const_iovec [2022-11-03 02:11:55,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 02:11:55,350 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2022-11-03 02:11:55,350 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2022-11-03 02:11:55,350 INFO L130 BoogieDeclarations]: Found specification of procedure tun_get_user [2022-11-03 02:11:55,350 INFO L138 BoogieDeclarations]: Found implementation of procedure tun_get_user [2022-11-03 02:11:55,351 INFO L130 BoogieDeclarations]: Found specification of procedure kfree_skb [2022-11-03 02:11:55,351 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree_skb [2022-11-03 02:11:55,351 INFO L130 BoogieDeclarations]: Found specification of procedure __tun_chr_ioctl [2022-11-03 02:11:55,351 INFO L138 BoogieDeclarations]: Found implementation of procedure __tun_chr_ioctl [2022-11-03 02:11:55,351 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-11-03 02:11:55,351 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-11-03 02:11:55,351 INFO L130 BoogieDeclarations]: Found specification of procedure tun_flow_delete [2022-11-03 02:11:55,351 INFO L138 BoogieDeclarations]: Found implementation of procedure tun_flow_delete [2022-11-03 02:11:55,351 INFO L130 BoogieDeclarations]: Found specification of procedure sock_rps_reset_flow_hash [2022-11-03 02:11:55,352 INFO L138 BoogieDeclarations]: Found implementation of procedure sock_rps_reset_flow_hash [2022-11-03 02:11:55,352 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2022-11-03 02:11:55,352 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2022-11-03 02:11:55,352 INFO L130 BoogieDeclarations]: Found specification of procedure tun_queue_purge [2022-11-03 02:11:55,352 INFO L138 BoogieDeclarations]: Found implementation of procedure tun_queue_purge [2022-11-03 02:11:55,352 INFO L130 BoogieDeclarations]: Found specification of procedure tun_hashfn [2022-11-03 02:11:55,352 INFO L138 BoogieDeclarations]: Found implementation of procedure tun_hashfn [2022-11-03 02:11:55,352 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2022-11-03 02:11:55,353 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2022-11-03 02:11:55,353 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2022-11-03 02:11:55,353 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2022-11-03 02:11:55,353 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-11-03 02:11:55,353 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-11-03 02:11:55,353 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_held [2022-11-03 02:11:55,353 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_held [2022-11-03 02:11:55,353 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_bh_75 [2022-11-03 02:11:55,353 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_bh_75 [2022-11-03 02:11:55,354 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-03 02:11:55,354 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-03 02:11:55,354 INFO L130 BoogieDeclarations]: Found specification of procedure tun_enable_queue [2022-11-03 02:11:55,354 INFO L138 BoogieDeclarations]: Found implementation of procedure tun_enable_queue [2022-11-03 02:11:55,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 02:11:55,354 INFO L130 BoogieDeclarations]: Found specification of procedure security_tun_dev_free_security [2022-11-03 02:11:55,354 INFO L138 BoogieDeclarations]: Found implementation of procedure security_tun_dev_free_security [2022-11-03 02:11:55,354 INFO L130 BoogieDeclarations]: Found specification of procedure hold_net [2022-11-03 02:11:55,354 INFO L138 BoogieDeclarations]: Found implementation of procedure hold_net [2022-11-03 02:11:55,355 INFO L130 BoogieDeclarations]: Found specification of procedure tun_set_real_num_queues [2022-11-03 02:11:55,355 INFO L138 BoogieDeclarations]: Found implementation of procedure tun_set_real_num_queues [2022-11-03 02:11:55,355 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-03 02:11:55,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-03 02:11:55,355 INFO L130 BoogieDeclarations]: Found specification of procedure uid_eq [2022-11-03 02:11:55,355 INFO L138 BoogieDeclarations]: Found implementation of procedure uid_eq [2022-11-03 02:11:55,355 INFO L130 BoogieDeclarations]: Found specification of procedure rtnl_link_unregister [2022-11-03 02:11:55,355 INFO L138 BoogieDeclarations]: Found implementation of procedure rtnl_link_unregister [2022-11-03 02:11:55,355 INFO L130 BoogieDeclarations]: Found specification of procedure tun_do_read [2022-11-03 02:11:55,355 INFO L138 BoogieDeclarations]: Found implementation of procedure tun_do_read [2022-11-03 02:11:55,356 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2022-11-03 02:11:55,356 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2022-11-03 02:11:55,356 INFO L130 BoogieDeclarations]: Found specification of procedure __kgid_val [2022-11-03 02:11:55,356 INFO L138 BoogieDeclarations]: Found implementation of procedure __kgid_val [2022-11-03 02:11:55,356 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2022-11-03 02:11:55,356 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2022-11-03 02:11:55,356 INFO L130 BoogieDeclarations]: Found specification of procedure is_multicast_ether_addr [2022-11-03 02:11:55,356 INFO L138 BoogieDeclarations]: Found implementation of procedure is_multicast_ether_addr [2022-11-03 02:11:55,357 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_inc [2022-11-03 02:11:55,357 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_inc [2022-11-03 02:11:55,357 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_rcu_suspicious [2022-11-03 02:11:55,357 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_rcu_suspicious [2022-11-03 02:11:55,357 INFO L130 BoogieDeclarations]: Found specification of procedure rtnl_lock [2022-11-03 02:11:55,357 INFO L138 BoogieDeclarations]: Found implementation of procedure rtnl_lock [2022-11-03 02:11:55,357 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2022-11-03 02:11:55,357 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2022-11-03 02:11:55,357 INFO L130 BoogieDeclarations]: Found specification of procedure PTR_ERR [2022-11-03 02:11:55,358 INFO L138 BoogieDeclarations]: Found implementation of procedure PTR_ERR [2022-11-03 02:11:55,358 INFO L130 BoogieDeclarations]: Found specification of procedure tun_detach_filter [2022-11-03 02:11:55,358 INFO L138 BoogieDeclarations]: Found implementation of procedure tun_detach_filter [2022-11-03 02:11:55,358 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_fromiovecend [2022-11-03 02:11:55,358 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_fromiovecend [2022-11-03 02:11:55,358 INFO L130 BoogieDeclarations]: Found specification of procedure round_jiffies_up [2022-11-03 02:11:55,358 INFO L138 BoogieDeclarations]: Found implementation of procedure round_jiffies_up [2022-11-03 02:11:55,358 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2022-11-03 02:11:55,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2022-11-03 02:11:55,359 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_unlock [2022-11-03 02:11:55,359 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_unlock [2022-11-03 02:11:55,359 INFO L130 BoogieDeclarations]: Found specification of procedure tun_put [2022-11-03 02:11:55,359 INFO L138 BoogieDeclarations]: Found implementation of procedure tun_put [2022-11-03 02:11:55,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:11:55,359 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2022-11-03 02:11:55,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2022-11-03 02:11:56,339 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:11:56,343 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:11:56,689 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-03 02:12:01,192 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2022-11-03 02:12:01,276 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:12:03,465 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:12:03,466 INFO L300 CfgBuilder]: Removed 20 assume(true) statements. [2022-11-03 02:12:03,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:12:03 BoogieIcfgContainer [2022-11-03 02:12:03,472 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:12:03,474 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:12:03,474 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:12:03,478 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:12:03,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:11:49" (1/3) ... [2022-11-03 02:12:03,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@98107bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:12:03, skipping insertion in model container [2022-11-03 02:12:03,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:11:54" (2/3) ... [2022-11-03 02:12:03,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@98107bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:12:03, skipping insertion in model container [2022-11-03 02:12:03,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:12:03" (3/3) ... [2022-11-03 02:12:03,481 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-tun.cil.i [2022-11-03 02:12:03,500 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:12:03,501 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-11-03 02:12:03,578 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:12:03,585 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;@35d4d37f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:12:03,585 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-03 02:12:03,594 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) [2022-11-03 02:12:03,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2022-11-03 02:12:03,626 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:12:03,627 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] [2022-11-03 02:12:03,628 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)] === [2022-11-03 02:12:03,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:12:03,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1134630085, now seen corresponding path program 1 times [2022-11-03 02:12:03,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:12:03,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443037001] [2022-11-03 02:12:03,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:03,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:12:04,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:04,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2862 trivial. 0 not checked. [2022-11-03 02:12:04,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:12:04,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443037001] [2022-11-03 02:12:04,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443037001] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:12:04,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:12:04,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:12:04,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980770660] [2022-11-03 02:12:04,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:12:04,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:12:04,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:12:04,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:12:04,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:12:04,764 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) [2022-11-03 02:12:09,642 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 [] [2022-11-03 02:12:10,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:12:10,155 INFO L93 Difference]: Finished difference Result 4457 states and 6606 transitions. [2022-11-03 02:12:10,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:12:10,159 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 [2022-11-03 02:12:10,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:12:10,202 INFO L225 Difference]: With dead ends: 4457 [2022-11-03 02:12:10,202 INFO L226 Difference]: Without dead ends: 2957 [2022-11-03 02:12:10,222 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 [2022-11-03 02:12:10,225 INFO L413 NwaCegarLoop]: 2420 mSDtfsCounter, 2120 mSDsluCounter, 2221 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2120 SdHoareTripleChecker+Valid, 4300 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:12:10,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2120 Valid, 4300 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-11-03 02:12:10,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2957 states. [2022-11-03 02:12:10,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2957 to 2927. [2022-11-03 02:12:10,539 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) [2022-11-03 02:12:10,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2927 states to 2927 states and 4281 transitions. [2022-11-03 02:12:10,569 INFO L78 Accepts]: Start accepts. Automaton has 2927 states and 4281 transitions. Word has length 291 [2022-11-03 02:12:10,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:12:10,576 INFO L495 AbstractCegarLoop]: Abstraction has 2927 states and 4281 transitions. [2022-11-03 02:12:10,577 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) [2022-11-03 02:12:10,577 INFO L276 IsEmpty]: Start isEmpty. Operand 2927 states and 4281 transitions. [2022-11-03 02:12:10,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-11-03 02:12:10,592 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:12:10,592 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] [2022-11-03 02:12:10,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:12:10,593 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)] === [2022-11-03 02:12:10,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:12:10,594 INFO L85 PathProgramCache]: Analyzing trace with hash 226750052, now seen corresponding path program 1 times [2022-11-03 02:12:10,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:12:10,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869437305] [2022-11-03 02:12:10,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:10,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:12:10,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:11,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2862 trivial. 0 not checked. [2022-11-03 02:12:11,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:12:11,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869437305] [2022-11-03 02:12:11,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869437305] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:12:11,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:12:11,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:12:11,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568088699] [2022-11-03 02:12:11,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:12:11,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:12:11,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:12:11,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:12:11,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:12:11,212 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) [2022-11-03 02:12:14,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:12:15,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:12:16,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:12:16,943 INFO L93 Difference]: Finished difference Result 8559 states and 12508 transitions. [2022-11-03 02:12:16,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:12:16,944 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 [2022-11-03 02:12:16,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:12:16,984 INFO L225 Difference]: With dead ends: 8559 [2022-11-03 02:12:16,985 INFO L226 Difference]: Without dead ends: 5687 [2022-11-03 02:12:16,998 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 [2022-11-03 02:12:17,000 INFO L413 NwaCegarLoop]: 2281 mSDtfsCounter, 2048 mSDsluCounter, 2165 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2048 SdHoareTripleChecker+Valid, 4108 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:12:17,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2048 Valid, 4108 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-11-03 02:12:17,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5687 states. [2022-11-03 02:12:17,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5687 to 5683. [2022-11-03 02:12:17,275 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) [2022-11-03 02:12:17,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5683 states to 5683 states and 8289 transitions. [2022-11-03 02:12:17,313 INFO L78 Accepts]: Start accepts. Automaton has 5683 states and 8289 transitions. Word has length 293 [2022-11-03 02:12:17,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:12:17,318 INFO L495 AbstractCegarLoop]: Abstraction has 5683 states and 8289 transitions. [2022-11-03 02:12:17,318 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) [2022-11-03 02:12:17,319 INFO L276 IsEmpty]: Start isEmpty. Operand 5683 states and 8289 transitions. [2022-11-03 02:12:17,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2022-11-03 02:12:17,327 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:12:17,327 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] [2022-11-03 02:12:17,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:12:17,328 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)] === [2022-11-03 02:12:17,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:12:17,330 INFO L85 PathProgramCache]: Analyzing trace with hash -2125534627, now seen corresponding path program 1 times [2022-11-03 02:12:17,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:12:17,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314709609] [2022-11-03 02:12:17,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:17,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:12:17,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:17,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2864 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2864 trivial. 0 not checked. [2022-11-03 02:12:17,837 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:12:17,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314709609] [2022-11-03 02:12:17,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314709609] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:12:17,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:12:17,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:12:17,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885765118] [2022-11-03 02:12:17,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:12:17,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:12:17,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:12:17,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:12:17,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:12:17,842 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) [2022-11-03 02:12:23,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:12:23,009 INFO L93 Difference]: Finished difference Result 11199 states and 16271 transitions. [2022-11-03 02:12:23,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:12:23,010 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 [2022-11-03 02:12:23,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:12:23,039 INFO L225 Difference]: With dead ends: 11199 [2022-11-03 02:12:23,039 INFO L226 Difference]: Without dead ends: 5571 [2022-11-03 02:12:23,059 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 [2022-11-03 02:12:23,062 INFO L413 NwaCegarLoop]: 2114 mSDtfsCounter, 1025 mSDsluCounter, 2153 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1025 SdHoareTripleChecker+Valid, 3939 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:12:23,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1025 Valid, 3939 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-11-03 02:12:23,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5571 states. [2022-11-03 02:12:23,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5571 to 5541. [2022-11-03 02:12:23,318 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) [2022-11-03 02:12:23,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5541 states to 5541 states and 7983 transitions. [2022-11-03 02:12:23,357 INFO L78 Accepts]: Start accepts. Automaton has 5541 states and 7983 transitions. Word has length 317 [2022-11-03 02:12:23,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:12:23,358 INFO L495 AbstractCegarLoop]: Abstraction has 5541 states and 7983 transitions. [2022-11-03 02:12:23,359 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) [2022-11-03 02:12:23,360 INFO L276 IsEmpty]: Start isEmpty. Operand 5541 states and 7983 transitions. [2022-11-03 02:12:23,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2022-11-03 02:12:23,367 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:12:23,367 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] [2022-11-03 02:12:23,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:12:23,368 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)] === [2022-11-03 02:12:23,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:12:23,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1688562737, now seen corresponding path program 1 times [2022-11-03 02:12:23,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:12:23,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950550172] [2022-11-03 02:12:23,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:23,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:12:23,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:24,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2996 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2996 trivial. 0 not checked. [2022-11-03 02:12:24,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:12:24,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950550172] [2022-11-03 02:12:24,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950550172] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:12:24,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:12:24,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:12:24,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609892135] [2022-11-03 02:12:24,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:12:24,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:12:24,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:12:24,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:12:24,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:12:24,179 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) [2022-11-03 02:12:28,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:12:30,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:12:31,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:12:31,148 INFO L93 Difference]: Finished difference Result 5547 states and 7988 transitions. [2022-11-03 02:12:31,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:12:31,148 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 [2022-11-03 02:12:31,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:12:31,178 INFO L225 Difference]: With dead ends: 5547 [2022-11-03 02:12:31,179 INFO L226 Difference]: Without dead ends: 5545 [2022-11-03 02:12:31,182 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 [2022-11-03 02:12:31,183 INFO L413 NwaCegarLoop]: 1867 mSDtfsCounter, 2137 mSDsluCounter, 4422 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2151 SdHoareTripleChecker+Valid, 5585 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:12:31,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2151 Valid, 5585 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1078 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2022-11-03 02:12:31,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5545 states. [2022-11-03 02:12:31,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5545 to 5545. [2022-11-03 02:12:31,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5545 states, 3519 states have (on average 1.3549303779482809) internal successors, (4768), 3646 states have internal predecessors, (4768), 1605 states have call successors, (1605), 422 states have call predecessors, (1605), 418 states have return successors, (1613), 1581 states have call predecessors, (1613), 1601 states have call successors, (1613) [2022-11-03 02:12:31,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5545 states to 5545 states and 7986 transitions. [2022-11-03 02:12:31,493 INFO L78 Accepts]: Start accepts. Automaton has 5545 states and 7986 transitions. Word has length 329 [2022-11-03 02:12:31,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:12:31,494 INFO L495 AbstractCegarLoop]: Abstraction has 5545 states and 7986 transitions. [2022-11-03 02:12:31,494 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) [2022-11-03 02:12:31,494 INFO L276 IsEmpty]: Start isEmpty. Operand 5545 states and 7986 transitions. [2022-11-03 02:12:31,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2022-11-03 02:12:31,503 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:12:31,503 INFO L195 NwaCegarLoop]: trace histogram [30, 27, 27, 27, 27, 27, 27, 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] [2022-11-03 02:12:31,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:12:31,504 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)] === [2022-11-03 02:12:31,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:12:31,505 INFO L85 PathProgramCache]: Analyzing trace with hash 729753892, now seen corresponding path program 1 times [2022-11-03 02:12:31,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:12:31,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523498654] [2022-11-03 02:12:31,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:31,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:12:31,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:32,408 INFO L134 CoverageAnalysis]: Checked inductivity of 3000 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2998 trivial. 0 not checked. [2022-11-03 02:12:32,408 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:12:32,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523498654] [2022-11-03 02:12:32,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523498654] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:12:32,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:12:32,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:12:32,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651261351] [2022-11-03 02:12:32,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:12:32,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:12:32,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:12:32,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:12:32,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:12:32,414 INFO L87 Difference]: Start difference. First operand 5545 states and 7986 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, (40), 3 states have call predecessors, (40), 1 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2022-11-03 02:12:36,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:12:37,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:12:39,564 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 [] [2022-11-03 02:12:41,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:12:41,258 INFO L93 Difference]: Finished difference Result 5551 states and 7991 transitions. [2022-11-03 02:12:41,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:12:41,258 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, (40), 3 states have call predecessors, (40), 1 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) Word has length 339 [2022-11-03 02:12:41,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:12:41,303 INFO L225 Difference]: With dead ends: 5551 [2022-11-03 02:12:41,304 INFO L226 Difference]: Without dead ends: 5549 [2022-11-03 02:12:41,307 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 [2022-11-03 02:12:41,308 INFO L413 NwaCegarLoop]: 1870 mSDtfsCounter, 2131 mSDsluCounter, 4422 mSDsCounter, 0 mSdLazyCounter, 1077 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2144 SdHoareTripleChecker+Valid, 5588 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1077 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:12:41,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2144 Valid, 5588 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1077 Invalid, 1 Unknown, 0 Unchecked, 8.4s Time] [2022-11-03 02:12:41,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5549 states. [2022-11-03 02:12:41,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5549 to 5549. [2022-11-03 02:12:41,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5549 states, 3522 states have (on average 1.3546280522430438) internal successors, (4771), 3649 states have internal predecessors, (4771), 1605 states have call successors, (1605), 423 states have call predecessors, (1605), 419 states have return successors, (1613), 1581 states have call predecessors, (1613), 1601 states have call successors, (1613) [2022-11-03 02:12:41,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5549 states to 5549 states and 7989 transitions. [2022-11-03 02:12:41,761 INFO L78 Accepts]: Start accepts. Automaton has 5549 states and 7989 transitions. Word has length 339 [2022-11-03 02:12:41,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:12:41,763 INFO L495 AbstractCegarLoop]: Abstraction has 5549 states and 7989 transitions. [2022-11-03 02:12:41,763 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, (40), 3 states have call predecessors, (40), 1 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2022-11-03 02:12:41,763 INFO L276 IsEmpty]: Start isEmpty. Operand 5549 states and 7989 transitions. [2022-11-03 02:12:41,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2022-11-03 02:12:41,772 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:12:41,772 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] [2022-11-03 02:12:41,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:12:41,772 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)] === [2022-11-03 02:12:41,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:12:41,773 INFO L85 PathProgramCache]: Analyzing trace with hash 64937486, now seen corresponding path program 1 times [2022-11-03 02:12:41,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:12:41,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712010100] [2022-11-03 02:12:41,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:41,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:12:41,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:42,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3007 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3003 trivial. 0 not checked. [2022-11-03 02:12:42,500 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:12:42,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712010100] [2022-11-03 02:12:42,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712010100] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:12:42,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:12:42,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:12:42,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314319534] [2022-11-03 02:12:42,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:12:42,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:12:42,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:12:42,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:12:42,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:12:42,505 INFO L87 Difference]: Start difference. First operand 5549 states and 7989 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) [2022-11-03 02:12:46,462 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 [] [2022-11-03 02:12:48,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:12:48,944 INFO L93 Difference]: Finished difference Result 5555 states and 7994 transitions. [2022-11-03 02:12:48,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:12:48,945 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 [2022-11-03 02:12:48,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:12:48,980 INFO L225 Difference]: With dead ends: 5555 [2022-11-03 02:12:48,980 INFO L226 Difference]: Without dead ends: 5553 [2022-11-03 02:12:48,984 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 [2022-11-03 02:12:48,985 INFO L413 NwaCegarLoop]: 1870 mSDtfsCounter, 2131 mSDsluCounter, 4422 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2143 SdHoareTripleChecker+Valid, 5588 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:12:48,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2143 Valid, 5588 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1078 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-11-03 02:12:48,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5553 states. [2022-11-03 02:12:49,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5553 to 5553. [2022-11-03 02:12:49,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5553 states, 3525 states have (on average 1.3543262411347519) internal successors, (4774), 3652 states have internal predecessors, (4774), 1605 states have call successors, (1605), 424 states have call predecessors, (1605), 420 states have return successors, (1613), 1581 states have call predecessors, (1613), 1601 states have call successors, (1613) [2022-11-03 02:12:49,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5553 states to 5553 states and 7992 transitions. [2022-11-03 02:12:49,319 INFO L78 Accepts]: Start accepts. Automaton has 5553 states and 7992 transitions. Word has length 345 [2022-11-03 02:12:49,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:12:49,320 INFO L495 AbstractCegarLoop]: Abstraction has 5553 states and 7992 transitions. [2022-11-03 02:12:49,320 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) [2022-11-03 02:12:49,320 INFO L276 IsEmpty]: Start isEmpty. Operand 5553 states and 7992 transitions. [2022-11-03 02:12:49,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2022-11-03 02:12:49,329 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:12:49,329 INFO L195 NwaCegarLoop]: trace histogram [30, 27, 27, 27, 27, 27, 27, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:12:49,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 02:12:49,330 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)] === [2022-11-03 02:12:49,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:12:49,330 INFO L85 PathProgramCache]: Analyzing trace with hash -922534263, now seen corresponding path program 1 times [2022-11-03 02:12:49,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:12:49,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801743177] [2022-11-03 02:12:49,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:49,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:12:49,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:49,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3017 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3011 trivial. 0 not checked. [2022-11-03 02:12:49,970 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:12:49,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801743177] [2022-11-03 02:12:49,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801743177] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:12:49,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:12:49,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:12:49,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050345926] [2022-11-03 02:12:49,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:12:49,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:12:49,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:12:49,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:12:49,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:12:49,973 INFO L87 Difference]: Start difference. First operand 5553 states and 7992 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, (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) [2022-11-03 02:12:56,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:12:56,000 INFO L93 Difference]: Finished difference Result 5559 states and 7997 transitions. [2022-11-03 02:12:56,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:12:56,001 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, (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 350 [2022-11-03 02:12:56,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:12:56,023 INFO L225 Difference]: With dead ends: 5559 [2022-11-03 02:12:56,023 INFO L226 Difference]: Without dead ends: 5557 [2022-11-03 02:12:56,027 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 [2022-11-03 02:12:56,028 INFO L413 NwaCegarLoop]: 1870 mSDtfsCounter, 2131 mSDsluCounter, 4422 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2142 SdHoareTripleChecker+Valid, 5588 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:12:56,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2142 Valid, 5588 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1078 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-11-03 02:12:56,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5557 states. [2022-11-03 02:12:56,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5557 to 5557. [2022-11-03 02:12:56,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5557 states, 3528 states have (on average 1.3540249433106577) internal successors, (4777), 3655 states have internal predecessors, (4777), 1605 states have call successors, (1605), 425 states have call predecessors, (1605), 421 states have return successors, (1613), 1581 states have call predecessors, (1613), 1601 states have call successors, (1613) [2022-11-03 02:12:56,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5557 states to 5557 states and 7995 transitions. [2022-11-03 02:12:56,387 INFO L78 Accepts]: Start accepts. Automaton has 5557 states and 7995 transitions. Word has length 350 [2022-11-03 02:12:56,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:12:56,388 INFO L495 AbstractCegarLoop]: Abstraction has 5557 states and 7995 transitions. [2022-11-03 02:12:56,388 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, (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) [2022-11-03 02:12:56,389 INFO L276 IsEmpty]: Start isEmpty. Operand 5557 states and 7995 transitions. [2022-11-03 02:12:56,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2022-11-03 02:12:56,399 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:12:56,399 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] [2022-11-03 02:12:56,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 02:12:56,399 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)] === [2022-11-03 02:12:56,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:12:56,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1033636526, now seen corresponding path program 1 times [2022-11-03 02:12:56,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:12:56,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866334894] [2022-11-03 02:12:56,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:56,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:12:56,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:57,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3031 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3023 trivial. 0 not checked. [2022-11-03 02:12:57,010 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:12:57,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866334894] [2022-11-03 02:12:57,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866334894] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:12:57,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:12:57,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:12:57,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111784693] [2022-11-03 02:12:57,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:12:57,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:12:57,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:12:57,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:12:57,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:12:57,012 INFO L87 Difference]: Start difference. First operand 5557 states and 7995 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) [2022-11-03 02:13:02,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:13:02,977 INFO L93 Difference]: Finished difference Result 5563 states and 8000 transitions. [2022-11-03 02:13:02,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:13:02,978 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 [2022-11-03 02:13:02,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:13:02,999 INFO L225 Difference]: With dead ends: 5563 [2022-11-03 02:13:03,000 INFO L226 Difference]: Without dead ends: 5561 [2022-11-03 02:13:03,003 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 [2022-11-03 02:13:03,004 INFO L413 NwaCegarLoop]: 1870 mSDtfsCounter, 2131 mSDsluCounter, 4422 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2141 SdHoareTripleChecker+Valid, 5588 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:13:03,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2141 Valid, 5588 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1078 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-11-03 02:13:03,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5561 states. [2022-11-03 02:13:03,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5561 to 5561. [2022-11-03 02:13:03,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5561 states, 3531 states have (on average 1.3537241574624752) internal successors, (4780), 3658 states have internal predecessors, (4780), 1605 states have call successors, (1605), 426 states have call predecessors, (1605), 422 states have return successors, (1613), 1581 states have call predecessors, (1613), 1601 states have call successors, (1613) [2022-11-03 02:13:03,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5561 states to 5561 states and 7998 transitions. [2022-11-03 02:13:03,396 INFO L78 Accepts]: Start accepts. Automaton has 5561 states and 7998 transitions. Word has length 355 [2022-11-03 02:13:03,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:13:03,397 INFO L495 AbstractCegarLoop]: Abstraction has 5561 states and 7998 transitions. [2022-11-03 02:13:03,397 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) [2022-11-03 02:13:03,398 INFO L276 IsEmpty]: Start isEmpty. Operand 5561 states and 7998 transitions. [2022-11-03 02:13:03,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 02:13:03,407 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:13:03,407 INFO L195 NwaCegarLoop]: trace histogram [30, 27, 27, 27, 27, 27, 27, 6, 5, 5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:13:03,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 02:13:03,408 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)] === [2022-11-03 02:13:03,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:13:03,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1197354140, now seen corresponding path program 1 times [2022-11-03 02:13:03,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:13:03,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881621472] [2022-11-03 02:13:03,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:03,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:13:03,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:04,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3048 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3038 trivial. 0 not checked. [2022-11-03 02:13:04,201 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:13:04,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881621472] [2022-11-03 02:13:04,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881621472] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:13:04,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:13:04,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:13:04,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666077363] [2022-11-03 02:13:04,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:13:04,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:13:04,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:13:04,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:13:04,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:13:04,204 INFO L87 Difference]: Start difference. First operand 5561 states and 7998 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) [2022-11-03 02:13:08,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:13:10,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:13:10,240 INFO L93 Difference]: Finished difference Result 5567 states and 8003 transitions. [2022-11-03 02:13:10,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:13:10,241 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 359 [2022-11-03 02:13:10,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:13:10,264 INFO L225 Difference]: With dead ends: 5567 [2022-11-03 02:13:10,264 INFO L226 Difference]: Without dead ends: 5565 [2022-11-03 02:13:10,268 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 [2022-11-03 02:13:10,269 INFO L413 NwaCegarLoop]: 1870 mSDtfsCounter, 2131 mSDsluCounter, 4422 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2140 SdHoareTripleChecker+Valid, 5588 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:13:10,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2140 Valid, 5588 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1078 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-11-03 02:13:10,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5565 states. [2022-11-03 02:13:10,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5565 to 5565. [2022-11-03 02:13:10,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5565 states, 3534 states have (on average 1.3534238822863611) internal successors, (4783), 3661 states have internal predecessors, (4783), 1605 states have call successors, (1605), 427 states have call predecessors, (1605), 423 states have return successors, (1613), 1581 states have call predecessors, (1613), 1601 states have call successors, (1613) [2022-11-03 02:13:10,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5565 states to 5565 states and 8001 transitions. [2022-11-03 02:13:10,687 INFO L78 Accepts]: Start accepts. Automaton has 5565 states and 8001 transitions. Word has length 359 [2022-11-03 02:13:10,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:13:10,688 INFO L495 AbstractCegarLoop]: Abstraction has 5565 states and 8001 transitions. [2022-11-03 02:13:10,688 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) [2022-11-03 02:13:10,688 INFO L276 IsEmpty]: Start isEmpty. Operand 5565 states and 8001 transitions. [2022-11-03 02:13:10,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2022-11-03 02:13:10,695 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:13:10,695 INFO L195 NwaCegarLoop]: trace histogram [30, 27, 27, 27, 27, 27, 27, 7, 6, 6, 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] [2022-11-03 02:13:10,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 02:13:10,695 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)] === [2022-11-03 02:13:10,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:13:10,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1355571378, now seen corresponding path program 1 times [2022-11-03 02:13:10,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:13:10,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296483369] [2022-11-03 02:13:10,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:10,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:13:10,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:11,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3071 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 3059 trivial. 0 not checked. [2022-11-03 02:13:11,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:13:11,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296483369] [2022-11-03 02:13:11,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296483369] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:13:11,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:13:11,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:13:11,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874439283] [2022-11-03 02:13:11,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:13:11,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:13:11,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:13:11,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:13:11,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:13:11,377 INFO L87 Difference]: Start difference. First operand 5565 states and 8001 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, (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) [2022-11-03 02:13:16,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:13:16,935 INFO L93 Difference]: Finished difference Result 5571 states and 8006 transitions. [2022-11-03 02:13:16,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:13:16,935 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, (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 365 [2022-11-03 02:13:16,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:13:16,957 INFO L225 Difference]: With dead ends: 5571 [2022-11-03 02:13:16,957 INFO L226 Difference]: Without dead ends: 5569 [2022-11-03 02:13:16,961 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 [2022-11-03 02:13:16,961 INFO L413 NwaCegarLoop]: 1870 mSDtfsCounter, 2131 mSDsluCounter, 4422 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2139 SdHoareTripleChecker+Valid, 5588 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:13:16,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2139 Valid, 5588 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1078 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-11-03 02:13:16,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5569 states. [2022-11-03 02:13:17,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5569 to 5569. [2022-11-03 02:13:17,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5569 states, 3537 states have (on average 1.353124116482895) internal successors, (4786), 3664 states have internal predecessors, (4786), 1605 states have call successors, (1605), 428 states have call predecessors, (1605), 424 states have return successors, (1613), 1581 states have call predecessors, (1613), 1601 states have call successors, (1613) [2022-11-03 02:13:17,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5569 states to 5569 states and 8004 transitions. [2022-11-03 02:13:17,434 INFO L78 Accepts]: Start accepts. Automaton has 5569 states and 8004 transitions. Word has length 365 [2022-11-03 02:13:17,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:13:17,434 INFO L495 AbstractCegarLoop]: Abstraction has 5569 states and 8004 transitions. [2022-11-03 02:13:17,435 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, (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) [2022-11-03 02:13:17,435 INFO L276 IsEmpty]: Start isEmpty. Operand 5569 states and 8004 transitions. [2022-11-03 02:13:17,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2022-11-03 02:13:17,443 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:13:17,443 INFO L195 NwaCegarLoop]: trace histogram [30, 27, 27, 27, 27, 27, 27, 8, 7, 7, 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] [2022-11-03 02:13:17,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 02:13:17,443 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)] === [2022-11-03 02:13:17,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:13:17,444 INFO L85 PathProgramCache]: Analyzing trace with hash 2138002564, now seen corresponding path program 1 times [2022-11-03 02:13:17,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:13:17,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502369444] [2022-11-03 02:13:17,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:17,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:13:17,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:18,081 INFO L134 CoverageAnalysis]: Checked inductivity of 3096 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 3082 trivial. 0 not checked. [2022-11-03 02:13:18,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:13:18,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502369444] [2022-11-03 02:13:18,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502369444] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:13:18,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:13:18,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:13:18,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266939297] [2022-11-03 02:13:18,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:13:18,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:13:18,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:13:18,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:13:18,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:13:18,084 INFO L87 Difference]: Start difference. First operand 5569 states and 8004 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, (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) [2022-11-03 02:13:24,018 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 [] [2022-11-03 02:13:25,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:13:25,450 INFO L93 Difference]: Finished difference Result 9497 states and 13676 transitions. [2022-11-03 02:13:25,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:13:25,450 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, (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 369 [2022-11-03 02:13:25,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:13:25,487 INFO L225 Difference]: With dead ends: 9497 [2022-11-03 02:13:25,488 INFO L226 Difference]: Without dead ends: 9495 [2022-11-03 02:13:25,493 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 [2022-11-03 02:13:25,494 INFO L413 NwaCegarLoop]: 2267 mSDtfsCounter, 1884 mSDsluCounter, 7353 mSDsCounter, 0 mSdLazyCounter, 1442 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1891 SdHoareTripleChecker+Valid, 8560 SdHoareTripleChecker+Invalid, 1446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1442 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:13:25,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1891 Valid, 8560 Invalid, 1446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1442 Invalid, 1 Unknown, 0 Unchecked, 6.6s Time] [2022-11-03 02:13:25,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9495 states. [2022-11-03 02:13:26,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9495 to 9485. [2022-11-03 02:13:26,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9485 states, 6037 states have (on average 1.3587874772237867) internal successors, (8203), 6256 states have internal predecessors, (8203), 2717 states have call successors, (2717), 739 states have call predecessors, (2717), 728 states have return successors, (2746), 2662 states have call predecessors, (2746), 2709 states have call successors, (2746) [2022-11-03 02:13:26,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9485 states to 9485 states and 13666 transitions. [2022-11-03 02:13:26,350 INFO L78 Accepts]: Start accepts. Automaton has 9485 states and 13666 transitions. Word has length 369 [2022-11-03 02:13:26,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:13:26,350 INFO L495 AbstractCegarLoop]: Abstraction has 9485 states and 13666 transitions. [2022-11-03 02:13:26,351 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, (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) [2022-11-03 02:13:26,351 INFO L276 IsEmpty]: Start isEmpty. Operand 9485 states and 13666 transitions. [2022-11-03 02:13:26,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2022-11-03 02:13:26,359 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:13:26,359 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] [2022-11-03 02:13:26,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 02:13:26,359 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)] === [2022-11-03 02:13:26,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:13:26,360 INFO L85 PathProgramCache]: Analyzing trace with hash 825351446, now seen corresponding path program 1 times [2022-11-03 02:13:26,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:13:26,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573739542] [2022-11-03 02:13:26,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:26,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:13:26,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:26,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3071 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3068 trivial. 0 not checked. [2022-11-03 02:13:26,782 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:13:26,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573739542] [2022-11-03 02:13:26,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573739542] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:13:26,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:13:26,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:13:26,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389932394] [2022-11-03 02:13:26,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:13:26,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:13:26,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:13:26,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:13:26,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:13:26,785 INFO L87 Difference]: Start difference. First operand 9485 states and 13666 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) [2022-11-03 02:13:31,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:13:32,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:13:32,490 INFO L93 Difference]: Finished difference Result 20254 states and 29202 transitions. [2022-11-03 02:13:32,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:13:32,490 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 [2022-11-03 02:13:32,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:13:32,533 INFO L225 Difference]: With dead ends: 20254 [2022-11-03 02:13:32,533 INFO L226 Difference]: Without dead ends: 12171 [2022-11-03 02:13:32,563 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 [2022-11-03 02:13:32,564 INFO L413 NwaCegarLoop]: 2710 mSDtfsCounter, 1023 mSDsluCounter, 2145 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1023 SdHoareTripleChecker+Valid, 4526 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:13:32,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1023 Valid, 4526 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-11-03 02:13:32,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12171 states. [2022-11-03 02:13:33,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12171 to 12057. [2022-11-03 02:13:33,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12057 states, 7694 states have (on average 1.3587210813621002) internal successors, (10454), 7973 states have internal predecessors, (10454), 3432 states have call successors, (3432), 945 states have call predecessors, (3432), 928 states have return successors, (3466), 3351 states have call predecessors, (3466), 3424 states have call successors, (3466) [2022-11-03 02:13:33,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12057 states to 12057 states and 17352 transitions. [2022-11-03 02:13:33,643 INFO L78 Accepts]: Start accepts. Automaton has 12057 states and 17352 transitions. Word has length 369 [2022-11-03 02:13:33,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:13:33,644 INFO L495 AbstractCegarLoop]: Abstraction has 12057 states and 17352 transitions. [2022-11-03 02:13:33,645 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) [2022-11-03 02:13:33,645 INFO L276 IsEmpty]: Start isEmpty. Operand 12057 states and 17352 transitions. [2022-11-03 02:13:33,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2022-11-03 02:13:33,655 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:13:33,655 INFO L195 NwaCegarLoop]: trace histogram [30, 27, 27, 27, 27, 27, 27, 9, 8, 8, 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] [2022-11-03 02:13:33,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 02:13:33,656 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)] === [2022-11-03 02:13:33,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:13:33,656 INFO L85 PathProgramCache]: Analyzing trace with hash 758765715, now seen corresponding path program 1 times [2022-11-03 02:13:33,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:13:33,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392243714] [2022-11-03 02:13:33,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:33,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:13:33,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:34,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3126 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 3110 trivial. 0 not checked. [2022-11-03 02:13:34,223 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:13:34,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392243714] [2022-11-03 02:13:34,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392243714] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:13:34,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:13:34,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:13:34,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102422441] [2022-11-03 02:13:34,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:13:34,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:13:34,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:13:34,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:13:34,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:13:34,225 INFO L87 Difference]: Start difference. First operand 12057 states and 17352 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) [2022-11-03 02:13:40,105 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 [] [2022-11-03 02:13:41,791 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:13:42,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:13:42,273 INFO L93 Difference]: Finished difference Result 12067 states and 17361 transitions. [2022-11-03 02:13:42,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:13:42,274 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 374 [2022-11-03 02:13:42,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:13:42,324 INFO L225 Difference]: With dead ends: 12067 [2022-11-03 02:13:42,324 INFO L226 Difference]: Without dead ends: 12065 [2022-11-03 02:13:42,333 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 [2022-11-03 02:13:42,333 INFO L413 NwaCegarLoop]: 1870 mSDtfsCounter, 2131 mSDsluCounter, 4422 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2137 SdHoareTripleChecker+Valid, 5588 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:13:42,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2137 Valid, 5588 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1078 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2022-11-03 02:13:42,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12065 states. [2022-11-03 02:13:43,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12065 to 12065. [2022-11-03 02:13:43,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12065 states, 7700 states have (on average 1.3584415584415583) internal successors, (10460), 7979 states have internal predecessors, (10460), 3432 states have call successors, (3432), 947 states have call predecessors, (3432), 930 states have return successors, (3466), 3351 states have call predecessors, (3466), 3424 states have call successors, (3466) [2022-11-03 02:13:43,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12065 states to 12065 states and 17358 transitions. [2022-11-03 02:13:43,284 INFO L78 Accepts]: Start accepts. Automaton has 12065 states and 17358 transitions. Word has length 374 [2022-11-03 02:13:43,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:13:43,285 INFO L495 AbstractCegarLoop]: Abstraction has 12065 states and 17358 transitions. [2022-11-03 02:13:43,285 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) [2022-11-03 02:13:43,285 INFO L276 IsEmpty]: Start isEmpty. Operand 12065 states and 17358 transitions. [2022-11-03 02:13:43,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2022-11-03 02:13:43,292 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:13:43,292 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] [2022-11-03 02:13:43,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 02:13:43,293 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)] === [2022-11-03 02:13:43,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:13:43,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1375762106, now seen corresponding path program 1 times [2022-11-03 02:13:43,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:13:43,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634824926] [2022-11-03 02:13:43,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:43,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:13:43,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:43,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3158 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 3140 trivial. 0 not checked. [2022-11-03 02:13:43,926 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:13:43,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634824926] [2022-11-03 02:13:43,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634824926] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:13:43,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:13:43,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:13:43,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98198446] [2022-11-03 02:13:43,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:13:43,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:13:43,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:13:43,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:13:43,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:13:43,929 INFO L87 Difference]: Start difference. First operand 12065 states and 17358 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) [2022-11-03 02:13:45,114 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 [] [2022-11-03 02:13:52,218 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 [] [2022-11-03 02:13:52,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:13:52,773 INFO L93 Difference]: Finished difference Result 12075 states and 17367 transitions. [2022-11-03 02:13:52,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:13:52,773 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 [2022-11-03 02:13:52,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:13:52,811 INFO L225 Difference]: With dead ends: 12075 [2022-11-03 02:13:52,812 INFO L226 Difference]: Without dead ends: 12073 [2022-11-03 02:13:52,816 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 [2022-11-03 02:13:52,817 INFO L413 NwaCegarLoop]: 1870 mSDtfsCounter, 2132 mSDsluCounter, 4422 mSDsCounter, 0 mSdLazyCounter, 1077 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2137 SdHoareTripleChecker+Valid, 5588 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1077 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:13:52,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2137 Valid, 5588 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1077 Invalid, 1 Unknown, 0 Unchecked, 8.0s Time] [2022-11-03 02:13:52,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12073 states. [2022-11-03 02:13:53,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12073 to 12073. [2022-11-03 02:13:53,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12073 states, 7706 states have (on average 1.3581624708019724) internal successors, (10466), 7985 states have internal predecessors, (10466), 3432 states have call successors, (3432), 949 states have call predecessors, (3432), 932 states have return successors, (3466), 3351 states have call predecessors, (3466), 3424 states have call successors, (3466) [2022-11-03 02:13:53,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12073 states to 12073 states and 17364 transitions. [2022-11-03 02:13:53,751 INFO L78 Accepts]: Start accepts. Automaton has 12073 states and 17364 transitions. Word has length 374 [2022-11-03 02:13:53,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:13:53,752 INFO L495 AbstractCegarLoop]: Abstraction has 12073 states and 17364 transitions. [2022-11-03 02:13:53,753 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) [2022-11-03 02:13:53,753 INFO L276 IsEmpty]: Start isEmpty. Operand 12073 states and 17364 transitions. [2022-11-03 02:13:53,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2022-11-03 02:13:53,760 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:13:53,760 INFO L195 NwaCegarLoop]: trace histogram [30, 27, 27, 27, 27, 27, 27, 11, 10, 10, 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] [2022-11-03 02:13:53,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-03 02:13:53,761 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)] === [2022-11-03 02:13:53,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:13:53,761 INFO L85 PathProgramCache]: Analyzing trace with hash 388788979, now seen corresponding path program 1 times [2022-11-03 02:13:53,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:13:53,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011202363] [2022-11-03 02:13:53,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:53,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:13:53,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:54,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3198 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 3178 trivial. 0 not checked. [2022-11-03 02:13:54,391 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:13:54,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011202363] [2022-11-03 02:13:54,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011202363] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:13:54,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:13:54,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:13:54,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118123993] [2022-11-03 02:13:54,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:13:54,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:13:54,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:13:54,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:13:54,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:13:54,393 INFO L87 Difference]: Start difference. First operand 12073 states and 17364 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, (49), 3 states have call predecessors, (49), 1 states have return successors, (47), 2 states have call predecessors, (47), 2 states have call successors, (47) [2022-11-03 02:13:59,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:14:01,573 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 [] [2022-11-03 02:14:02,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:02,129 INFO L93 Difference]: Finished difference Result 12083 states and 17373 transitions. [2022-11-03 02:14:02,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:14:02,130 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, (49), 3 states have call predecessors, (49), 1 states have return successors, (47), 2 states have call predecessors, (47), 2 states have call successors, (47) Word has length 384 [2022-11-03 02:14:02,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:02,156 INFO L225 Difference]: With dead ends: 12083 [2022-11-03 02:14:02,156 INFO L226 Difference]: Without dead ends: 12081 [2022-11-03 02:14:02,160 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 [2022-11-03 02:14:02,161 INFO L413 NwaCegarLoop]: 1870 mSDtfsCounter, 2131 mSDsluCounter, 4422 mSDsCounter, 0 mSdLazyCounter, 1077 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2135 SdHoareTripleChecker+Valid, 5588 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1077 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:02,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2135 Valid, 5588 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1077 Invalid, 1 Unknown, 0 Unchecked, 6.9s Time] [2022-11-03 02:14:02,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12081 states. [2022-11-03 02:14:03,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12081 to 12081. [2022-11-03 02:14:03,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12081 states, 7712 states have (on average 1.357883817427386) internal successors, (10472), 7991 states have internal predecessors, (10472), 3432 states have call successors, (3432), 951 states have call predecessors, (3432), 934 states have return successors, (3466), 3351 states have call predecessors, (3466), 3424 states have call successors, (3466) [2022-11-03 02:14:03,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12081 states to 12081 states and 17370 transitions. [2022-11-03 02:14:03,344 INFO L78 Accepts]: Start accepts. Automaton has 12081 states and 17370 transitions. Word has length 384 [2022-11-03 02:14:03,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:03,345 INFO L495 AbstractCegarLoop]: Abstraction has 12081 states and 17370 transitions. [2022-11-03 02:14:03,345 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, (49), 3 states have call predecessors, (49), 1 states have return successors, (47), 2 states have call predecessors, (47), 2 states have call successors, (47) [2022-11-03 02:14:03,345 INFO L276 IsEmpty]: Start isEmpty. Operand 12081 states and 17370 transitions. [2022-11-03 02:14:03,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2022-11-03 02:14:03,354 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:03,354 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] [2022-11-03 02:14:03,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-03 02:14:03,354 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)] === [2022-11-03 02:14:03,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:03,355 INFO L85 PathProgramCache]: Analyzing trace with hash -286103031, now seen corresponding path program 1 times [2022-11-03 02:14:03,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:14:03,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446799512] [2022-11-03 02:14:03,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:03,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:14:03,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:03,949 INFO L134 CoverageAnalysis]: Checked inductivity of 3241 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 3219 trivial. 0 not checked. [2022-11-03 02:14:03,949 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:14:03,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446799512] [2022-11-03 02:14:03,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446799512] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:03,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:03,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:14:03,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764000321] [2022-11-03 02:14:03,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:03,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:14:03,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:14:03,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:14:03,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:14:03,954 INFO L87 Difference]: Start difference. First operand 12081 states and 17370 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) [2022-11-03 02:14:09,736 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 [] [2022-11-03 02:14:10,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:10,493 INFO L93 Difference]: Finished difference Result 12486 states and 17828 transitions. [2022-11-03 02:14:10,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:14:10,494 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 [2022-11-03 02:14:10,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:10,535 INFO L225 Difference]: With dead ends: 12486 [2022-11-03 02:14:10,535 INFO L226 Difference]: Without dead ends: 12484 [2022-11-03 02:14:10,541 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 [2022-11-03 02:14:10,542 INFO L413 NwaCegarLoop]: 1933 mSDtfsCounter, 1980 mSDsluCounter, 4967 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1985 SdHoareTripleChecker+Valid, 6115 SdHoareTripleChecker+Invalid, 1167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:10,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1985 Valid, 6115 Invalid, 1167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1165 Invalid, 1 Unknown, 0 Unchecked, 5.5s Time] [2022-11-03 02:14:10,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12484 states. [2022-11-03 02:14:11,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12484 to 12480. [2022-11-03 02:14:11,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12480 states, 7946 states have (on average 1.3535112006040775) internal successors, (10755), 8241 states have internal predecessors, (10755), 3513 states have call successors, (3513), 1032 states have call predecessors, (3513), 1018 states have return successors, (3555), 3431 states have call predecessors, (3555), 3505 states have call successors, (3555) [2022-11-03 02:14:11,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12480 states to 12480 states and 17823 transitions. [2022-11-03 02:14:11,524 INFO L78 Accepts]: Start accepts. Automaton has 12480 states and 17823 transitions. Word has length 390 [2022-11-03 02:14:11,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:11,526 INFO L495 AbstractCegarLoop]: Abstraction has 12480 states and 17823 transitions. [2022-11-03 02:14:11,526 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) [2022-11-03 02:14:11,526 INFO L276 IsEmpty]: Start isEmpty. Operand 12480 states and 17823 transitions. [2022-11-03 02:14:11,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2022-11-03 02:14:11,535 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:11,536 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] [2022-11-03 02:14:11,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-03 02:14:11,537 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)] === [2022-11-03 02:14:11,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:11,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1718722191, now seen corresponding path program 1 times [2022-11-03 02:14:11,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:14:11,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515064717] [2022-11-03 02:14:11,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:11,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:14:11,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:12,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3284 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 3260 trivial. 0 not checked. [2022-11-03 02:14:12,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:14:12,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515064717] [2022-11-03 02:14:12,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515064717] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:12,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:12,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:14:12,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221832097] [2022-11-03 02:14:12,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:12,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:14:12,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:14:12,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:14:12,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:14:12,160 INFO L87 Difference]: Start difference. First operand 12480 states and 17823 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) [2022-11-03 02:14:16,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:14:18,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:14:19,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:14:20,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:20,183 INFO L93 Difference]: Finished difference Result 12490 states and 17832 transitions. [2022-11-03 02:14:20,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:14:20,183 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 [2022-11-03 02:14:20,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:20,222 INFO L225 Difference]: With dead ends: 12490 [2022-11-03 02:14:20,222 INFO L226 Difference]: Without dead ends: 12488 [2022-11-03 02:14:20,228 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 [2022-11-03 02:14:20,228 INFO L413 NwaCegarLoop]: 1870 mSDtfsCounter, 2132 mSDsluCounter, 4422 mSDsCounter, 0 mSdLazyCounter, 1077 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2134 SdHoareTripleChecker+Valid, 5588 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1077 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:20,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2134 Valid, 5588 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1077 Invalid, 1 Unknown, 0 Unchecked, 7.1s Time] [2022-11-03 02:14:20,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12488 states. [2022-11-03 02:14:21,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12488 to 12488. [2022-11-03 02:14:21,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12488 states, 7952 states have (on average 1.3532444668008048) internal successors, (10761), 8247 states have internal predecessors, (10761), 3513 states have call successors, (3513), 1034 states have call predecessors, (3513), 1020 states have return successors, (3555), 3431 states have call predecessors, (3555), 3505 states have call successors, (3555) [2022-11-03 02:14:21,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12488 states to 12488 states and 17829 transitions. [2022-11-03 02:14:21,186 INFO L78 Accepts]: Start accepts. Automaton has 12488 states and 17829 transitions. Word has length 389 [2022-11-03 02:14:21,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:21,187 INFO L495 AbstractCegarLoop]: Abstraction has 12488 states and 17829 transitions. [2022-11-03 02:14:21,187 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) [2022-11-03 02:14:21,187 INFO L276 IsEmpty]: Start isEmpty. Operand 12488 states and 17829 transitions. [2022-11-03 02:14:21,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2022-11-03 02:14:21,195 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:21,195 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] [2022-11-03 02:14:21,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-03 02:14:21,196 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)] === [2022-11-03 02:14:21,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:21,196 INFO L85 PathProgramCache]: Analyzing trace with hash 2071886947, now seen corresponding path program 1 times [2022-11-03 02:14:21,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:14:21,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486973106] [2022-11-03 02:14:21,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:21,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:14:21,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:21,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3106 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3106 trivial. 0 not checked. [2022-11-03 02:14:21,581 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:14:21,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486973106] [2022-11-03 02:14:21,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486973106] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:21,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:21,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:14:21,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148943079] [2022-11-03 02:14:21,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:21,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:14:21,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:14:21,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:14:21,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:14:21,583 INFO L87 Difference]: Start difference. First operand 12488 states and 17829 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) [2022-11-03 02:14:26,992 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 [] [2022-11-03 02:14:28,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:28,334 INFO L93 Difference]: Finished difference Result 31058 states and 44433 transitions. [2022-11-03 02:14:28,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:14:28,335 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 [2022-11-03 02:14:28,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:28,394 INFO L225 Difference]: With dead ends: 31058 [2022-11-03 02:14:28,394 INFO L226 Difference]: Without dead ends: 18625 [2022-11-03 02:14:28,441 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 [2022-11-03 02:14:28,441 INFO L413 NwaCegarLoop]: 2601 mSDtfsCounter, 1880 mSDsluCounter, 2182 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1882 SdHoareTripleChecker+Valid, 4448 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:28,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1882 Valid, 4448 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 825 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2022-11-03 02:14:28,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18625 states. [2022-11-03 02:14:30,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18625 to 18449. [2022-11-03 02:14:30,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18449 states, 11827 states have (on average 1.358839942504439) internal successors, (16071), 12300 states have internal predecessors, (16071), 5118 states have call successors, (5118), 1527 states have call predecessors, (5118), 1501 states have return successors, (5191), 4943 states have call predecessors, (5191), 5110 states have call successors, (5191) [2022-11-03 02:14:30,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18449 states to 18449 states and 26380 transitions. [2022-11-03 02:14:30,135 INFO L78 Accepts]: Start accepts. Automaton has 18449 states and 26380 transitions. Word has length 405 [2022-11-03 02:14:30,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:30,135 INFO L495 AbstractCegarLoop]: Abstraction has 18449 states and 26380 transitions. [2022-11-03 02:14:30,136 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) [2022-11-03 02:14:30,136 INFO L276 IsEmpty]: Start isEmpty. Operand 18449 states and 26380 transitions. [2022-11-03 02:14:30,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2022-11-03 02:14:30,143 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:30,143 INFO L195 NwaCegarLoop]: trace histogram [30, 27, 27, 27, 27, 27, 27, 14, 13, 13, 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] [2022-11-03 02:14:30,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-03 02:14:30,144 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)] === [2022-11-03 02:14:30,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:30,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1650438522, now seen corresponding path program 1 times [2022-11-03 02:14:30,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:14:30,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312071051] [2022-11-03 02:14:30,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:30,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:14:30,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:30,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3334 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 3308 trivial. 0 not checked. [2022-11-03 02:14:30,713 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:14:30,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312071051] [2022-11-03 02:14:30,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312071051] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:30,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:30,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:14:30,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649098392] [2022-11-03 02:14:30,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:30,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:14:30,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:14:30,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:14:30,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:14:30,716 INFO L87 Difference]: Start difference. First operand 18449 states and 26380 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, (49), 3 states have call predecessors, (49), 1 states have return successors, (47), 2 states have call predecessors, (47), 2 states have call successors, (47) [2022-11-03 02:14:37,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:14:39,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:14:40,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:40,055 INFO L93 Difference]: Finished difference Result 18459 states and 26389 transitions. [2022-11-03 02:14:40,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:14:40,056 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, (49), 3 states have call predecessors, (49), 1 states have return successors, (47), 2 states have call predecessors, (47), 2 states have call successors, (47) Word has length 394 [2022-11-03 02:14:40,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:40,091 INFO L225 Difference]: With dead ends: 18459 [2022-11-03 02:14:40,092 INFO L226 Difference]: Without dead ends: 18455 [2022-11-03 02:14:40,096 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 [2022-11-03 02:14:40,096 INFO L413 NwaCegarLoop]: 1870 mSDtfsCounter, 2132 mSDsluCounter, 4422 mSDsCounter, 0 mSdLazyCounter, 1077 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2133 SdHoareTripleChecker+Valid, 5588 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1077 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:40,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2133 Valid, 5588 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1077 Invalid, 1 Unknown, 0 Unchecked, 7.8s Time] [2022-11-03 02:14:40,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18455 states. [2022-11-03 02:14:41,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18455 to 18455. [2022-11-03 02:14:41,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18455 states, 11832 states have (on average 1.358603786342123) internal successors, (16075), 12304 states have internal predecessors, (16075), 5118 states have call successors, (5118), 1529 states have call predecessors, (5118), 1502 states have return successors, (5191), 4943 states have call predecessors, (5191), 5110 states have call successors, (5191) [2022-11-03 02:14:41,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18455 states to 18455 states and 26384 transitions. [2022-11-03 02:14:41,797 INFO L78 Accepts]: Start accepts. Automaton has 18455 states and 26384 transitions. Word has length 394 [2022-11-03 02:14:41,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:41,798 INFO L495 AbstractCegarLoop]: Abstraction has 18455 states and 26384 transitions. [2022-11-03 02:14:41,798 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, (49), 3 states have call predecessors, (49), 1 states have return successors, (47), 2 states have call predecessors, (47), 2 states have call successors, (47) [2022-11-03 02:14:41,798 INFO L276 IsEmpty]: Start isEmpty. Operand 18455 states and 26384 transitions. [2022-11-03 02:14:41,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2022-11-03 02:14:41,810 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:41,811 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] [2022-11-03 02:14:41,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-03 02:14:41,811 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)] === [2022-11-03 02:14:41,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:41,812 INFO L85 PathProgramCache]: Analyzing trace with hash 212688465, now seen corresponding path program 1 times [2022-11-03 02:14:41,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:14:41,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476241670] [2022-11-03 02:14:41,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:41,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:14:41,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:42,495 INFO L134 CoverageAnalysis]: Checked inductivity of 3388 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 3360 trivial. 0 not checked. [2022-11-03 02:14:42,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:14:42,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476241670] [2022-11-03 02:14:42,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476241670] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:42,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:42,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:14:42,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899173000] [2022-11-03 02:14:42,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:42,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:14:42,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:14:42,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:14:42,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:14:42,498 INFO L87 Difference]: Start difference. First operand 18455 states and 26384 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) [2022-11-03 02:14:47,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:14:49,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:49,183 INFO L93 Difference]: Finished difference Result 18461 states and 26389 transitions. [2022-11-03 02:14:49,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:14:49,184 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 [2022-11-03 02:14:49,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:49,228 INFO L225 Difference]: With dead ends: 18461 [2022-11-03 02:14:49,228 INFO L226 Difference]: Without dead ends: 18238 [2022-11-03 02:14:49,235 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 [2022-11-03 02:14:49,236 INFO L413 NwaCegarLoop]: 1871 mSDtfsCounter, 2132 mSDsluCounter, 4424 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2132 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, 5.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:49,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2132 Valid, 5591 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-11-03 02:14:49,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18238 states. [2022-11-03 02:14:50,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18238 to 18238. [2022-11-03 02:14:50,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18238 states, 11745 states have (on average 1.3581098339719029) internal successors, (15951), 12181 states have internal predecessors, (15951), 5017 states have call successors, (5017), 1491 states have call predecessors, (5017), 1473 states have return successors, (5094), 4887 states have call predecessors, (5094), 5013 states have call successors, (5094) [2022-11-03 02:14:51,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18238 states to 18238 states and 26062 transitions. [2022-11-03 02:14:51,033 INFO L78 Accepts]: Start accepts. Automaton has 18238 states and 26062 transitions. Word has length 399 [2022-11-03 02:14:51,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:51,034 INFO L495 AbstractCegarLoop]: Abstraction has 18238 states and 26062 transitions. [2022-11-03 02:14:51,034 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) [2022-11-03 02:14:51,034 INFO L276 IsEmpty]: Start isEmpty. Operand 18238 states and 26062 transitions. [2022-11-03 02:14:51,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2022-11-03 02:14:51,045 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:51,045 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] [2022-11-03 02:14:51,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-03 02:14:51,045 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)] === [2022-11-03 02:14:51,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:51,046 INFO L85 PathProgramCache]: Analyzing trace with hash 591303228, now seen corresponding path program 1 times [2022-11-03 02:14:51,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:14:51,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647199544] [2022-11-03 02:14:51,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:51,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:14:51,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:52,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3530 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3530 trivial. 0 not checked. [2022-11-03 02:14:52,224 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:14:52,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647199544] [2022-11-03 02:14:52,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647199544] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:52,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:52,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:14:52,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58090618] [2022-11-03 02:14:52,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:52,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:14:52,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:14:52,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:14:52,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:14:52,228 INFO L87 Difference]: Start difference. First operand 18238 states and 26062 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) [2022-11-03 02:14:59,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:59,202 INFO L93 Difference]: Finished difference Result 18783 states and 26704 transitions. [2022-11-03 02:14:59,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:14:59,212 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 [2022-11-03 02:14:59,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:59,263 INFO L225 Difference]: With dead ends: 18783 [2022-11-03 02:14:59,263 INFO L226 Difference]: Without dead ends: 18781 [2022-11-03 02:14:59,269 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 [2022-11-03 02:14:59,270 INFO L413 NwaCegarLoop]: 1885 mSDtfsCounter, 1976 mSDsluCounter, 4686 mSDsCounter, 0 mSdLazyCounter, 1108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1977 SdHoareTripleChecker+Valid, 5825 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:59,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1977 Valid, 5825 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1108 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-11-03 02:14:59,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18781 states. [2022-11-03 02:15:01,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18781 to 18781. [2022-11-03 02:15:01,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18781 states, 12074 states have (on average 1.3525757826735134) internal successors, (16331), 12521 states have internal predecessors, (16331), 5137 states have call successors, (5137), 1586 states have call predecessors, (5137), 1568 states have return successors, (5214), 5007 states have call predecessors, (5214), 5133 states have call successors, (5214) [2022-11-03 02:15:01,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18781 states to 18781 states and 26682 transitions. [2022-11-03 02:15:01,133 INFO L78 Accepts]: Start accepts. Automaton has 18781 states and 26682 transitions. Word has length 461 [2022-11-03 02:15:01,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:01,134 INFO L495 AbstractCegarLoop]: Abstraction has 18781 states and 26682 transitions. [2022-11-03 02:15:01,134 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) [2022-11-03 02:15:01,134 INFO L276 IsEmpty]: Start isEmpty. Operand 18781 states and 26682 transitions. [2022-11-03 02:15:01,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2022-11-03 02:15:01,145 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:01,145 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] [2022-11-03 02:15:01,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-03 02:15:01,146 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)] === [2022-11-03 02:15:01,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:01,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1107551630, now seen corresponding path program 1 times [2022-11-03 02:15:01,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:15:01,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349211953] [2022-11-03 02:15:01,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:01,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:15:01,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:01,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3569 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3569 trivial. 0 not checked. [2022-11-03 02:15:01,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:15:01,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349211953] [2022-11-03 02:15:01,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349211953] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:01,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:15:01,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:15:01,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537039682] [2022-11-03 02:15:01,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:01,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:15:01,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:15:01,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:15:01,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:15:01,658 INFO L87 Difference]: Start difference. First operand 18781 states and 26682 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) [2022-11-03 02:15:05,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:15:07,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:07,489 INFO L93 Difference]: Finished difference Result 37339 states and 53093 transitions. [2022-11-03 02:15:07,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:15:07,490 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 [2022-11-03 02:15:07,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:07,539 INFO L225 Difference]: With dead ends: 37339 [2022-11-03 02:15:07,539 INFO L226 Difference]: Without dead ends: 18801 [2022-11-03 02:15:07,571 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 [2022-11-03 02:15:07,571 INFO L413 NwaCegarLoop]: 1854 mSDtfsCounter, 5 mSDsluCounter, 2201 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 3704 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:07,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 3704 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-03 02:15:07,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18801 states. [2022-11-03 02:15:09,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18801 to 18785. [2022-11-03 02:15:09,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18785 states, 12078 states have (on average 1.3524590163934427) internal successors, (16335), 12525 states have internal predecessors, (16335), 5137 states have call successors, (5137), 1586 states have call predecessors, (5137), 1568 states have return successors, (5214), 5007 states have call predecessors, (5214), 5133 states have call successors, (5214) [2022-11-03 02:15:09,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18785 states to 18785 states and 26686 transitions. [2022-11-03 02:15:09,168 INFO L78 Accepts]: Start accepts. Automaton has 18785 states and 26686 transitions. Word has length 476 [2022-11-03 02:15:09,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:09,168 INFO L495 AbstractCegarLoop]: Abstraction has 18785 states and 26686 transitions. [2022-11-03 02:15:09,169 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) [2022-11-03 02:15:09,169 INFO L276 IsEmpty]: Start isEmpty. Operand 18785 states and 26686 transitions. [2022-11-03 02:15:09,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2022-11-03 02:15:09,178 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:09,178 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] [2022-11-03 02:15:09,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-03 02:15:09,179 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)] === [2022-11-03 02:15:09,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:09,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1851688221, now seen corresponding path program 1 times [2022-11-03 02:15:09,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:15:09,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758659768] [2022-11-03 02:15:09,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:09,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:15:09,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:09,759 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3569 trivial. 0 not checked. [2022-11-03 02:15:09,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:15:09,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758659768] [2022-11-03 02:15:09,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758659768] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:15:09,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505952758] [2022-11-03 02:15:09,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:09,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:15:09,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d1a92c-2ccf-4b64-92fd-2cddd804ec31/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:15:09,768 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d1a92c-2ccf-4b64-92fd-2cddd804ec31/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:15:09,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1d1a92c-2ccf-4b64-92fd-2cddd804ec31/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:15:11,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:11,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 4414 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:15:11,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:11,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3569 trivial. 0 not checked. [2022-11-03 02:15:11,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:15:11,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3569 trivial. 0 not checked. [2022-11-03 02:15:11,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505952758] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:15:11,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2021232271] [2022-11-03 02:15:11,658 INFO L159 IcfgInterpreter]: Started Sifa with 179 locations of interest [2022-11-03 02:15:11,658 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:15:11,662 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:15:11,668 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:15:11,668 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs