./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-usb-smsc75xx.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2494d63-412d-411d-bf95-44564a5666b3/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2494d63-412d-411d-bf95-44564a5666b3/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2494d63-412d-411d-bf95-44564a5666b3/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2494d63-412d-411d-bf95-44564a5666b3/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2494d63-412d-411d-bf95-44564a5666b3/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2494d63-412d-411d-bf95-44564a5666b3/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 24362a0e750636c52038fc4d3468ffab15d6b74376c584ca05819f34fdf58260 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:51:11,941 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:51:11,945 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:51:12,005 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:51:12,006 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:51:12,008 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:51:12,010 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:51:12,014 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:51:12,017 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:51:12,018 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:51:12,020 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:51:12,022 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:51:12,023 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:51:12,025 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:51:12,027 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:51:12,029 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:51:12,031 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:51:12,032 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:51:12,035 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:51:12,039 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:51:12,042 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:51:12,044 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:51:12,046 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:51:12,047 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:51:12,053 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:51:12,053 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:51:12,054 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:51:12,055 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:51:12,056 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:51:12,058 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:51:12,058 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:51:12,060 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:51:12,061 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:51:12,062 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:51:12,064 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:51:12,065 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:51:12,066 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:51:12,066 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:51:12,067 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:51:12,069 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:51:12,070 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:51:12,071 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2494d63-412d-411d-bf95-44564a5666b3/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-21 01:51:12,130 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:51:12,133 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:51:12,135 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:51:12,136 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:51:12,137 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:51:12,138 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:51:12,138 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:51:12,138 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:51:12,138 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:51:12,139 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:51:12,140 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:51:12,140 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:51:12,141 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:51:12,141 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:51:12,141 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:51:12,142 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:51:12,142 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:51:12,142 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:51:12,143 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:51:12,144 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:51:12,144 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:51:12,144 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:51:12,145 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:51:12,145 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:51:12,145 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:51:12,145 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:51:12,147 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:51:12,148 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:51:12,148 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:51:12,148 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:51:12,149 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:51:12,149 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:51:12,150 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:51:12,150 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:51:12,150 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:51:12,151 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:51:12,151 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:51:12,151 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:51:12,151 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2494d63-412d-411d-bf95-44564a5666b3/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2494d63-412d-411d-bf95-44564a5666b3/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 24362a0e750636c52038fc4d3468ffab15d6b74376c584ca05819f34fdf58260 [2021-11-21 01:51:12,548 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:51:12,580 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:51:12,583 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:51:12,585 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:51:12,586 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:51:12,588 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2494d63-412d-411d-bf95-44564a5666b3/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i [2021-11-21 01:51:12,680 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2494d63-412d-411d-bf95-44564a5666b3/bin/utaipan-TEXQjIfE4P/data/e8777b44e/a74fdf34da1143dabda91276d6130ce8/FLAG03e7d3011 [2021-11-21 01:51:13,812 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:51:13,813 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2494d63-412d-411d-bf95-44564a5666b3/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i [2021-11-21 01:51:13,880 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2494d63-412d-411d-bf95-44564a5666b3/bin/utaipan-TEXQjIfE4P/data/e8777b44e/a74fdf34da1143dabda91276d6130ce8/FLAG03e7d3011 [2021-11-21 01:51:14,172 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2494d63-412d-411d-bf95-44564a5666b3/bin/utaipan-TEXQjIfE4P/data/e8777b44e/a74fdf34da1143dabda91276d6130ce8 [2021-11-21 01:51:14,175 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:51:14,177 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:51:14,179 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:51:14,179 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:51:14,183 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:51:14,184 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:51:14" (1/1) ... [2021-11-21 01:51:14,186 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@86189e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:14, skipping insertion in model container [2021-11-21 01:51:14,186 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:51:14" (1/1) ... [2021-11-21 01:51:14,194 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:51:14,413 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:51:17,635 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_e2494d63-412d-411d-bf95-44564a5666b3/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i[359515,359528] [2021-11-21 01:51:17,638 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_e2494d63-412d-411d-bf95-44564a5666b3/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i[359684,359697] [2021-11-21 01:51:17,639 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_e2494d63-412d-411d-bf95-44564a5666b3/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i[359851,359864] [2021-11-21 01:51:17,640 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_e2494d63-412d-411d-bf95-44564a5666b3/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i[360019,360032] [2021-11-21 01:51:17,665 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:51:17,705 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:51:18,219 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_e2494d63-412d-411d-bf95-44564a5666b3/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i[359515,359528] [2021-11-21 01:51:18,220 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_e2494d63-412d-411d-bf95-44564a5666b3/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i[359684,359697] [2021-11-21 01:51:18,221 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_e2494d63-412d-411d-bf95-44564a5666b3/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i[359851,359864] [2021-11-21 01:51:18,221 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_e2494d63-412d-411d-bf95-44564a5666b3/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i[360019,360032] [2021-11-21 01:51:18,229 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:51:18,520 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:51:18,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:18 WrapperNode [2021-11-21 01:51:18,521 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:51:18,522 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:51:18,523 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:51:18,523 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:51:18,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:18" (1/1) ... [2021-11-21 01:51:18,695 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:18" (1/1) ... [2021-11-21 01:51:18,952 INFO L137 Inliner]: procedures = 390, calls = 3756, calls flagged for inlining = 180, calls inlined = 163, statements flattened = 7743 [2021-11-21 01:51:18,953 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:51:18,954 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:51:18,954 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:51:18,955 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:51:18,965 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:18" (1/1) ... [2021-11-21 01:51:18,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:18" (1/1) ... [2021-11-21 01:51:19,032 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:18" (1/1) ... [2021-11-21 01:51:19,046 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:18" (1/1) ... [2021-11-21 01:51:19,286 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:18" (1/1) ... [2021-11-21 01:51:19,313 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:18" (1/1) ... [2021-11-21 01:51:19,342 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:18" (1/1) ... [2021-11-21 01:51:19,392 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:51:19,393 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:51:19,394 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:51:19,394 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:51:19,395 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:18" (1/1) ... [2021-11-21 01:51:19,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:51:19,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2494d63-412d-411d-bf95-44564a5666b3/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:51:19,433 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2494d63-412d-411d-bf95-44564a5666b3/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:51:19,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2494d63-412d-411d-bf95-44564a5666b3/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:51:19,491 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_write_reg_nopm [2021-11-21 01:51:19,491 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_write_reg_nopm [2021-11-21 01:51:19,492 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-21 01:51:19,492 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-21 01:51:19,492 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_nway_reset [2021-11-21 01:51:19,492 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_nway_reset [2021-11-21 01:51:19,492 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-21 01:51:19,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-21 01:51:19,493 INFO L130 BoogieDeclarations]: Found specification of procedure smsc_crc [2021-11-21 01:51:19,493 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc_crc [2021-11-21 01:51:19,493 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-21 01:51:19,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-21 01:51:19,494 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_61 [2021-11-21 01:51:19,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_61 [2021-11-21 01:51:19,494 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_enable_phy_wakeup_interrupts [2021-11-21 01:51:19,494 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_enable_phy_wakeup_interrupts [2021-11-21 01:51:19,494 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_reset [2021-11-21 01:51:19,495 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_reset [2021-11-21 01:51:19,495 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_wait_eeprom [2021-11-21 01:51:19,495 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_wait_eeprom [2021-11-21 01:51:19,495 INFO L130 BoogieDeclarations]: Found specification of procedure __smsc75xx_mdio_write [2021-11-21 01:51:19,495 INFO L138 BoogieDeclarations]: Found implementation of procedure __smsc75xx_mdio_write [2021-11-21 01:51:19,496 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-21 01:51:19,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-21 01:51:19,496 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_write_cmd_nopm [2021-11-21 01:51:19,497 INFO L130 BoogieDeclarations]: Found specification of procedure skb_end_pointer [2021-11-21 01:51:19,497 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_end_pointer [2021-11-21 01:51:19,497 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_rx_csum_offload [2021-11-21 01:51:19,497 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_rx_csum_offload [2021-11-21 01:51:19,497 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-21 01:51:19,498 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-21 01:51:19,498 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-21 01:51:19,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-21 01:51:19,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:51:19,499 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_set_features [2021-11-21 01:51:19,499 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_set_features [2021-11-21 01:51:19,499 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-21 01:51:19,500 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_resume [2021-11-21 01:51:19,500 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_resume [2021-11-21 01:51:19,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-21 01:51:19,500 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-21 01:51:19,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-21 01:51:19,501 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_tx_timeout [2021-11-21 01:51:19,502 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_tx_timeout [2021-11-21 01:51:19,503 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_mdio_read_nopm [2021-11-21 01:51:19,503 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_mdio_read_nopm [2021-11-21 01:51:19,503 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 01:51:19,504 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-21 01:51:19,504 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-21 01:51:19,504 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_write_cmd [2021-11-21 01:51:19,504 INFO L130 BoogieDeclarations]: Found specification of procedure __smsc75xx_phy_wait_not_busy [2021-11-21 01:51:19,505 INFO L138 BoogieDeclarations]: Found implementation of procedure __smsc75xx_phy_wait_not_busy [2021-11-21 01:51:19,505 INFO L130 BoogieDeclarations]: Found specification of procedure skb_trim [2021-11-21 01:51:19,505 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_trim [2021-11-21 01:51:19,506 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_mdio_write [2021-11-21 01:51:19,506 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_mdio_write [2021-11-21 01:51:19,506 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_read_cmd_nopm [2021-11-21 01:51:19,507 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-21 01:51:19,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-21 01:51:19,507 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 01:51:19,507 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_1 [2021-11-21 01:51:19,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_1 [2021-11-21 01:51:19,508 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_0 [2021-11-21 01:51:19,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_0 [2021-11-21 01:51:19,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:51:19,508 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-21 01:51:19,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-21 01:51:19,509 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-21 01:51:19,510 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-21 01:51:19,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 01:51:19,510 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-21 01:51:19,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-21 01:51:19,510 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_open [2021-11-21 01:51:19,511 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_open [2021-11-21 01:51:19,511 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_mdio_read [2021-11-21 01:51:19,511 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_mdio_read [2021-11-21 01:51:19,511 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_set_rx_max_frame_length [2021-11-21 01:51:19,512 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_set_rx_max_frame_length [2021-11-21 01:51:19,512 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_spin_lock [2021-11-21 01:51:19,513 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_spin_lock [2021-11-21 01:51:19,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:51:19,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:51:19,513 INFO L130 BoogieDeclarations]: Found specification of procedure __smsc75xx_read_reg [2021-11-21 01:51:19,514 INFO L138 BoogieDeclarations]: Found implementation of procedure __smsc75xx_read_reg [2021-11-21 01:51:19,514 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2021-11-21 01:51:19,515 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2021-11-21 01:51:19,515 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2021-11-21 01:51:19,516 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2021-11-21 01:51:19,516 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_ethtool_get_eeprom_len [2021-11-21 01:51:19,517 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_ethtool_get_eeprom_len [2021-11-21 01:51:19,517 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-21 01:51:19,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-21 01:51:19,517 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-21 01:51:19,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-21 01:51:19,518 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_EMGentry_exit_smsc75xx_driver_exit_6_2 [2021-11-21 01:51:19,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_EMGentry_exit_smsc75xx_driver_exit_6_2 [2021-11-21 01:51:19,518 INFO L130 BoogieDeclarations]: Found specification of procedure skb_push [2021-11-21 01:51:19,519 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_push [2021-11-21 01:51:19,519 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-21 01:51:19,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-21 01:51:19,520 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~u8~0~X~~u8~0~X~~u16~0~X~~u16~0~X~$Pointer$~X~~u16~0~TO~int [2021-11-21 01:51:19,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~u8~0~X~~u8~0~X~~u16~0~X~~u16~0~X~$Pointer$~X~~u16~0~TO~int [2021-11-21 01:51:19,520 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_read_reg [2021-11-21 01:51:19,520 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_read_reg [2021-11-21 01:51:19,521 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_stop [2021-11-21 01:51:19,522 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_stop [2021-11-21 01:51:19,525 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-21 01:51:19,525 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-21 01:51:19,525 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_mdio_write_nopm [2021-11-21 01:51:19,525 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_mdio_write_nopm [2021-11-21 01:51:19,526 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_set_multicast [2021-11-21 01:51:19,526 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_set_multicast [2021-11-21 01:51:19,527 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:51:19,527 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-11-21 01:51:19,528 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-11-21 01:51:19,534 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 01:51:19,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 01:51:19,535 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-11-21 01:51:19,535 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-11-21 01:51:19,536 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-21 01:51:19,536 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-21 01:51:19,536 INFO L130 BoogieDeclarations]: Found specification of procedure __smsc75xx_mdio_read [2021-11-21 01:51:19,536 INFO L138 BoogieDeclarations]: Found implementation of procedure __smsc75xx_mdio_read [2021-11-21 01:51:19,536 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-21 01:51:19,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-21 01:51:19,537 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-21 01:51:19,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-21 01:51:19,537 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_read_reg_nopm [2021-11-21 01:51:19,537 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_read_reg_nopm [2021-11-21 01:51:19,537 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_disconnect [2021-11-21 01:51:19,537 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_disconnect [2021-11-21 01:51:19,538 INFO L130 BoogieDeclarations]: Found specification of procedure __smsc75xx_write_reg [2021-11-21 01:51:19,538 INFO L138 BoogieDeclarations]: Found implementation of procedure __smsc75xx_write_reg [2021-11-21 01:51:19,538 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_instance_release_2_4 [2021-11-21 01:51:19,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_instance_release_2_4 [2021-11-21 01:51:19,538 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_wait_ready [2021-11-21 01:51:19,538 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_wait_ready [2021-11-21 01:51:19,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 01:51:19,539 INFO L130 BoogieDeclarations]: Found specification of procedure skb_pull [2021-11-21 01:51:19,539 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_pull [2021-11-21 01:51:19,539 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_read_eeprom [2021-11-21 01:51:19,539 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_read_eeprom [2021-11-21 01:51:19,540 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-21 01:51:19,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-21 01:51:19,540 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_read_cmd [2021-11-21 01:51:19,540 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_link_reset [2021-11-21 01:51:19,540 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_link_reset [2021-11-21 01:51:19,540 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_resume [2021-11-21 01:51:19,541 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_resume [2021-11-21 01:51:19,541 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_write_wuff [2021-11-21 01:51:19,541 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_write_wuff [2021-11-21 01:51:19,541 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_eeprom_confirm_not_busy [2021-11-21 01:51:19,541 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_eeprom_confirm_not_busy [2021-11-21 01:51:19,541 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-21 01:51:19,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-21 01:51:19,542 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_enter_suspend2 [2021-11-21 01:51:19,542 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_enter_suspend2 [2021-11-21 01:51:19,542 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_enter_suspend1 [2021-11-21 01:51:19,542 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_enter_suspend1 [2021-11-21 01:51:19,543 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_write_reg [2021-11-21 01:51:19,543 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_write_reg [2021-11-21 01:51:19,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:51:19,543 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_rfe_ctl_lock_of_smsc75xx_priv [2021-11-21 01:51:19,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_rfe_ctl_lock_of_smsc75xx_priv [2021-11-21 01:51:19,543 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-21 01:51:19,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-21 01:51:20,674 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:51:20,679 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:51:21,128 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-21 01:51:26,326 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-21 01:51:30,831 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:51:32,122 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:51:32,123 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-21 01:51:32,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:51:32 BoogieIcfgContainer [2021-11-21 01:51:32,130 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:51:32,132 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:51:32,133 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:51:32,136 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:51:32,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:51:14" (1/3) ... [2021-11-21 01:51:32,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55e1bc21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:51:32, skipping insertion in model container [2021-11-21 01:51:32,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:18" (2/3) ... [2021-11-21 01:51:32,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55e1bc21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:51:32, skipping insertion in model container [2021-11-21 01:51:32,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:51:32" (3/3) ... [2021-11-21 01:51:32,142 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i [2021-11-21 01:51:32,149 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:51:32,149 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-21 01:51:32,235 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:51:32,251 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 01:51:32,252 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-21 01:51:32,322 INFO L276 IsEmpty]: Start isEmpty. Operand has 1346 states, 868 states have (on average 1.3997695852534562) internal successors, (1215), 871 states have internal predecessors, (1215), 403 states have call successors, (403), 73 states have call predecessors, (403), 72 states have return successors, (396), 396 states have call predecessors, (396), 396 states have call successors, (396) [2021-11-21 01:51:32,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-21 01:51:32,352 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:32,353 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 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] [2021-11-21 01:51:32,354 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:51:32,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:32,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1010905639, now seen corresponding path program 1 times [2021-11-21 01:51:32,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:51:32,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538447080] [2021-11-21 01:51:32,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:32,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:51:33,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:33,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1125 trivial. 0 not checked. [2021-11-21 01:51:33,441 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:51:33,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538447080] [2021-11-21 01:51:33,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538447080] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:51:33,443 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:51:33,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:51:33,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858486117] [2021-11-21 01:51:33,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:51:33,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:51:33,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:51:33,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:51:33,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:51:33,492 INFO L87 Difference]: Start difference. First operand has 1346 states, 868 states have (on average 1.3997695852534562) internal successors, (1215), 871 states have internal predecessors, (1215), 403 states have call successors, (403), 73 states have call predecessors, (403), 72 states have return successors, (396), 396 states have call predecessors, (396), 396 states have call successors, (396) Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-21 01:51:36,998 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:51:38,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:51:38,018 INFO L93 Difference]: Finished difference Result 3887 states and 5869 transitions. [2021-11-21 01:51:38,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:51:38,021 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 194 [2021-11-21 01:51:38,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:51:38,078 INFO L225 Difference]: With dead ends: 3887 [2021-11-21 01:51:38,079 INFO L226 Difference]: Without dead ends: 2565 [2021-11-21 01:51:38,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:51:38,106 INFO L933 BasicCegarLoop]: 2099 mSDtfsCounter, 1869 mSDsluCounter, 1956 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1869 SdHoareTripleChecker+Valid, 3811 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:51:38,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1869 Valid, 3811 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 535 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2021-11-21 01:51:38,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2565 states. [2021-11-21 01:51:38,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2565 to 2561. [2021-11-21 01:51:38,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2561 states, 1677 states have (on average 1.3977340488968395) internal successors, (2344), 1682 states have internal predecessors, (2344), 741 states have call successors, (741), 141 states have call predecessors, (741), 140 states have return successors, (737), 737 states have call predecessors, (737), 737 states have call successors, (737) [2021-11-21 01:51:38,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2561 states to 2561 states and 3822 transitions. [2021-11-21 01:51:38,570 INFO L78 Accepts]: Start accepts. Automaton has 2561 states and 3822 transitions. Word has length 194 [2021-11-21 01:51:38,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:51:38,575 INFO L470 AbstractCegarLoop]: Abstraction has 2561 states and 3822 transitions. [2021-11-21 01:51:38,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-21 01:51:38,583 INFO L276 IsEmpty]: Start isEmpty. Operand 2561 states and 3822 transitions. [2021-11-21 01:51:38,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-11-21 01:51:38,605 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:38,605 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:51:38,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:51:38,607 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:51:38,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:38,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1324102734, now seen corresponding path program 1 times [2021-11-21 01:51:38,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:51:38,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633852054] [2021-11-21 01:51:38,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:38,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:51:38,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:38,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1122 trivial. 0 not checked. [2021-11-21 01:51:38,861 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:51:38,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633852054] [2021-11-21 01:51:38,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633852054] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:51:38,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:51:38,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:51:38,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353688928] [2021-11-21 01:51:38,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:51:38,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:51:38,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:51:38,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:51:38,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:51:38,866 INFO L87 Difference]: Start difference. First operand 2561 states and 3822 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-21 01:51:41,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:51:41,636 INFO L93 Difference]: Finished difference Result 6140 states and 9119 transitions. [2021-11-21 01:51:41,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:51:41,637 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 203 [2021-11-21 01:51:41,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:51:41,676 INFO L225 Difference]: With dead ends: 6140 [2021-11-21 01:51:41,677 INFO L226 Difference]: Without dead ends: 3614 [2021-11-21 01:51:41,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:51:41,697 INFO L933 BasicCegarLoop]: 2158 mSDtfsCounter, 1712 mSDsluCounter, 1914 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1712 SdHoareTripleChecker+Valid, 3850 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:51:41,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1712 Valid, 3850 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-21 01:51:41,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3614 states. [2021-11-21 01:51:41,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3614 to 3587. [2021-11-21 01:51:41,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3587 states, 2333 states have (on average 1.3819117016716673) internal successors, (3224), 2343 states have internal predecessors, (3224), 1042 states have call successors, (1042), 210 states have call predecessors, (1042), 209 states have return successors, (1038), 1033 states have call predecessors, (1038), 1038 states have call successors, (1038) [2021-11-21 01:51:41,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3587 states to 3587 states and 5304 transitions. [2021-11-21 01:51:41,974 INFO L78 Accepts]: Start accepts. Automaton has 3587 states and 5304 transitions. Word has length 203 [2021-11-21 01:51:41,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:51:41,975 INFO L470 AbstractCegarLoop]: Abstraction has 3587 states and 5304 transitions. [2021-11-21 01:51:41,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-21 01:51:41,976 INFO L276 IsEmpty]: Start isEmpty. Operand 3587 states and 5304 transitions. [2021-11-21 01:51:41,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-11-21 01:51:41,992 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:41,992 INFO L514 BasicCegarLoop]: trace histogram [21, 17, 17, 17, 17, 17, 17, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:51:41,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:51:41,993 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:51:41,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:41,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1226844568, now seen corresponding path program 1 times [2021-11-21 01:51:41,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:51:41,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655736195] [2021-11-21 01:51:41,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:41,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:51:42,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:42,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1271 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1271 trivial. 0 not checked. [2021-11-21 01:51:42,628 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:51:42,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655736195] [2021-11-21 01:51:42,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655736195] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:51:42,634 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:51:42,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:51:42,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082284370] [2021-11-21 01:51:42,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:51:42,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:51:42,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:51:42,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:51:42,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:51:42,638 INFO L87 Difference]: Start difference. First operand 3587 states and 5304 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-21 01:51:44,946 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:51:47,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:51:47,155 INFO L93 Difference]: Finished difference Result 7006 states and 10358 transitions. [2021-11-21 01:51:47,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:51:47,156 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 239 [2021-11-21 01:51:47,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:51:47,231 INFO L225 Difference]: With dead ends: 7006 [2021-11-21 01:51:47,232 INFO L226 Difference]: Without dead ends: 7004 [2021-11-21 01:51:47,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:51:47,243 INFO L933 BasicCegarLoop]: 2179 mSDtfsCounter, 1891 mSDsluCounter, 6818 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1902 SdHoareTripleChecker+Valid, 8204 SdHoareTripleChecker+Invalid, 1086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:51:47,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1902 Valid, 8204 Invalid, 1086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1083 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2021-11-21 01:51:47,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7004 states. [2021-11-21 01:51:47,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7004 to 6998. [2021-11-21 01:51:47,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6998 states, 4552 states have (on average 1.383347978910369) internal successors, (6297), 4570 states have internal predecessors, (6297), 2032 states have call successors, (2032), 413 states have call predecessors, (2032), 411 states have return successors, (2024), 2014 states have call predecessors, (2024), 2024 states have call successors, (2024) [2021-11-21 01:51:47,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6998 states to 6998 states and 10353 transitions. [2021-11-21 01:51:47,865 INFO L78 Accepts]: Start accepts. Automaton has 6998 states and 10353 transitions. Word has length 239 [2021-11-21 01:51:47,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:51:47,868 INFO L470 AbstractCegarLoop]: Abstraction has 6998 states and 10353 transitions. [2021-11-21 01:51:47,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-21 01:51:47,868 INFO L276 IsEmpty]: Start isEmpty. Operand 6998 states and 10353 transitions. [2021-11-21 01:51:47,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-11-21 01:51:47,879 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:47,879 INFO L514 BasicCegarLoop]: trace histogram [21, 17, 17, 17, 17, 17, 17, 5, 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] [2021-11-21 01:51:47,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 01:51:47,880 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:51:47,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:47,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1516873341, now seen corresponding path program 1 times [2021-11-21 01:51:47,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:51:47,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492666540] [2021-11-21 01:51:47,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:47,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:51:48,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:48,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1271 trivial. 0 not checked. [2021-11-21 01:51:48,328 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:51:48,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492666540] [2021-11-21 01:51:48,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492666540] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:51:48,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:51:48,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:51:48,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260579946] [2021-11-21 01:51:48,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:51:48,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:51:48,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:51:48,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:51:48,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:51:48,336 INFO L87 Difference]: Start difference. First operand 6998 states and 10353 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-21 01:51:51,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:51:51,192 INFO L93 Difference]: Finished difference Result 7008 states and 10362 transitions. [2021-11-21 01:51:51,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:51:51,193 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 244 [2021-11-21 01:51:51,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:51:51,266 INFO L225 Difference]: With dead ends: 7008 [2021-11-21 01:51:51,266 INFO L226 Difference]: Without dead ends: 7006 [2021-11-21 01:51:51,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:51:51,277 INFO L933 BasicCegarLoop]: 1730 mSDtfsCounter, 1915 mSDsluCounter, 3953 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1925 SdHoareTripleChecker+Valid, 5171 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:51:51,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1925 Valid, 5171 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-21 01:51:51,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7006 states. [2021-11-21 01:51:51,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7006 to 7006. [2021-11-21 01:51:51,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7006 states, 4558 states have (on average 1.3828433523475208) internal successors, (6303), 4576 states have internal predecessors, (6303), 2032 states have call successors, (2032), 415 states have call predecessors, (2032), 413 states have return successors, (2024), 2014 states have call predecessors, (2024), 2024 states have call successors, (2024) [2021-11-21 01:51:51,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7006 states to 7006 states and 10359 transitions. [2021-11-21 01:51:51,891 INFO L78 Accepts]: Start accepts. Automaton has 7006 states and 10359 transitions. Word has length 244 [2021-11-21 01:51:51,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:51:51,896 INFO L470 AbstractCegarLoop]: Abstraction has 7006 states and 10359 transitions. [2021-11-21 01:51:51,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-21 01:51:51,897 INFO L276 IsEmpty]: Start isEmpty. Operand 7006 states and 10359 transitions. [2021-11-21 01:51:51,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-11-21 01:51:51,910 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:51,911 INFO L514 BasicCegarLoop]: trace histogram [21, 17, 17, 17, 17, 17, 17, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:51:51,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 01:51:51,912 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:51:51,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:51,914 INFO L85 PathProgramCache]: Analyzing trace with hash -383310763, now seen corresponding path program 1 times [2021-11-21 01:51:51,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:51:51,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370606634] [2021-11-21 01:51:51,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:51,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:51:52,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:52,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1269 trivial. 0 not checked. [2021-11-21 01:51:52,317 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:51:52,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370606634] [2021-11-21 01:51:52,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370606634] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:51:52,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:51:52,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:51:52,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565678961] [2021-11-21 01:51:52,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:51:52,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:51:52,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:51:52,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:51:52,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:51:52,321 INFO L87 Difference]: Start difference. First operand 7006 states and 10359 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-21 01:51:55,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:51:55,230 INFO L93 Difference]: Finished difference Result 7016 states and 10368 transitions. [2021-11-21 01:51:55,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:51:55,230 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 247 [2021-11-21 01:51:55,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:51:55,314 INFO L225 Difference]: With dead ends: 7016 [2021-11-21 01:51:55,314 INFO L226 Difference]: Without dead ends: 7014 [2021-11-21 01:51:55,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:51:55,323 INFO L933 BasicCegarLoop]: 1730 mSDtfsCounter, 1916 mSDsluCounter, 3953 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1925 SdHoareTripleChecker+Valid, 5171 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:51:55,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1925 Valid, 5171 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-21 01:51:55,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7014 states. [2021-11-21 01:51:55,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7014 to 7014. [2021-11-21 01:51:55,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7014 states, 4564 states have (on average 1.3823400525854515) internal successors, (6309), 4582 states have internal predecessors, (6309), 2032 states have call successors, (2032), 417 states have call predecessors, (2032), 415 states have return successors, (2024), 2014 states have call predecessors, (2024), 2024 states have call successors, (2024) [2021-11-21 01:51:55,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7014 states to 7014 states and 10365 transitions. [2021-11-21 01:51:55,842 INFO L78 Accepts]: Start accepts. Automaton has 7014 states and 10365 transitions. Word has length 247 [2021-11-21 01:51:55,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:51:55,843 INFO L470 AbstractCegarLoop]: Abstraction has 7014 states and 10365 transitions. [2021-11-21 01:51:55,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-21 01:51:55,844 INFO L276 IsEmpty]: Start isEmpty. Operand 7014 states and 10365 transitions. [2021-11-21 01:51:55,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-11-21 01:51:55,855 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:55,856 INFO L514 BasicCegarLoop]: trace histogram [21, 17, 17, 17, 17, 17, 17, 4, 4, 4, 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] [2021-11-21 01:51:55,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 01:51:55,856 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:51:55,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:55,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1985033264, now seen corresponding path program 1 times [2021-11-21 01:51:55,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:51:55,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871748413] [2021-11-21 01:51:55,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:55,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:51:55,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:56,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1283 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1277 trivial. 0 not checked. [2021-11-21 01:51:56,155 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:51:56,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871748413] [2021-11-21 01:51:56,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871748413] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:51:56,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:51:56,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:51:56,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114005804] [2021-11-21 01:51:56,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:51:56,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:51:56,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:51:56,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:51:56,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:51:56,159 INFO L87 Difference]: Start difference. First operand 7014 states and 10365 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-21 01:51:58,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:51:58,701 INFO L93 Difference]: Finished difference Result 7024 states and 10374 transitions. [2021-11-21 01:51:58,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:51:58,702 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 252 [2021-11-21 01:51:58,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:51:58,737 INFO L225 Difference]: With dead ends: 7024 [2021-11-21 01:51:58,738 INFO L226 Difference]: Without dead ends: 7022 [2021-11-21 01:51:58,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:51:58,745 INFO L933 BasicCegarLoop]: 1730 mSDtfsCounter, 1916 mSDsluCounter, 3953 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1924 SdHoareTripleChecker+Valid, 5171 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:51:58,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1924 Valid, 5171 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-21 01:51:58,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7022 states. [2021-11-21 01:51:59,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7022 to 7022. [2021-11-21 01:51:59,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7022 states, 4570 states have (on average 1.3818380743982495) internal successors, (6315), 4588 states have internal predecessors, (6315), 2032 states have call successors, (2032), 419 states have call predecessors, (2032), 417 states have return successors, (2024), 2014 states have call predecessors, (2024), 2024 states have call successors, (2024) [2021-11-21 01:51:59,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7022 states to 7022 states and 10371 transitions. [2021-11-21 01:51:59,239 INFO L78 Accepts]: Start accepts. Automaton has 7022 states and 10371 transitions. Word has length 252 [2021-11-21 01:51:59,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:51:59,242 INFO L470 AbstractCegarLoop]: Abstraction has 7022 states and 10371 transitions. [2021-11-21 01:51:59,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-21 01:51:59,242 INFO L276 IsEmpty]: Start isEmpty. Operand 7022 states and 10371 transitions. [2021-11-21 01:51:59,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-11-21 01:51:59,258 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:59,259 INFO L514 BasicCegarLoop]: trace histogram [21, 17, 17, 17, 17, 17, 17, 5, 4, 4, 4, 4, 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] [2021-11-21 01:51:59,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 01:51:59,259 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:51:59,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:59,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1578439435, now seen corresponding path program 1 times [2021-11-21 01:51:59,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:51:59,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974652574] [2021-11-21 01:51:59,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:51:59,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:51:59,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:51:59,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1297 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1289 trivial. 0 not checked. [2021-11-21 01:51:59,561 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:51:59,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974652574] [2021-11-21 01:51:59,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974652574] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:51:59,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:51:59,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:51:59,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679581977] [2021-11-21 01:51:59,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:51:59,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:51:59,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:51:59,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:51:59,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:51:59,565 INFO L87 Difference]: Start difference. First operand 7022 states and 10371 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-21 01:52:01,392 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:52:02,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:52:02,780 INFO L93 Difference]: Finished difference Result 7032 states and 10380 transitions. [2021-11-21 01:52:02,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:52:02,781 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 257 [2021-11-21 01:52:02,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:52:02,825 INFO L225 Difference]: With dead ends: 7032 [2021-11-21 01:52:02,825 INFO L226 Difference]: Without dead ends: 7030 [2021-11-21 01:52:02,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:52:02,833 INFO L933 BasicCegarLoop]: 1730 mSDtfsCounter, 1916 mSDsluCounter, 3953 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1923 SdHoareTripleChecker+Valid, 5171 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:52:02,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1923 Valid, 5171 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-21 01:52:02,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7030 states. [2021-11-21 01:52:03,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7030 to 7030. [2021-11-21 01:52:03,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7030 states, 4576 states have (on average 1.3813374125874125) internal successors, (6321), 4594 states have internal predecessors, (6321), 2032 states have call successors, (2032), 421 states have call predecessors, (2032), 419 states have return successors, (2024), 2014 states have call predecessors, (2024), 2024 states have call successors, (2024) [2021-11-21 01:52:03,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7030 states to 7030 states and 10377 transitions. [2021-11-21 01:52:03,289 INFO L78 Accepts]: Start accepts. Automaton has 7030 states and 10377 transitions. Word has length 257 [2021-11-21 01:52:03,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:52:03,289 INFO L470 AbstractCegarLoop]: Abstraction has 7030 states and 10377 transitions. [2021-11-21 01:52:03,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-21 01:52:03,290 INFO L276 IsEmpty]: Start isEmpty. Operand 7030 states and 10377 transitions. [2021-11-21 01:52:03,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-11-21 01:52:03,303 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:52:03,304 INFO L514 BasicCegarLoop]: trace histogram [21, 17, 17, 17, 17, 17, 17, 6, 5, 5, 4, 4, 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] [2021-11-21 01:52:03,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 01:52:03,304 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:52:03,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:52:03,305 INFO L85 PathProgramCache]: Analyzing trace with hash 434896656, now seen corresponding path program 1 times [2021-11-21 01:52:03,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:52:03,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374041962] [2021-11-21 01:52:03,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:52:03,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:52:03,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:52:03,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1315 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1305 trivial. 0 not checked. [2021-11-21 01:52:03,602 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:52:03,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374041962] [2021-11-21 01:52:03,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374041962] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:52:03,603 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:52:03,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:52:03,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813185955] [2021-11-21 01:52:03,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:52:03,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:52:03,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:52:03,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:52:03,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:52:03,605 INFO L87 Difference]: Start difference. First operand 7030 states and 10377 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-21 01:52:06,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:52:06,298 INFO L93 Difference]: Finished difference Result 7040 states and 10386 transitions. [2021-11-21 01:52:06,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:52:06,298 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 262 [2021-11-21 01:52:06,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:52:06,331 INFO L225 Difference]: With dead ends: 7040 [2021-11-21 01:52:06,331 INFO L226 Difference]: Without dead ends: 7038 [2021-11-21 01:52:06,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:52:06,337 INFO L933 BasicCegarLoop]: 1730 mSDtfsCounter, 1916 mSDsluCounter, 3953 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1922 SdHoareTripleChecker+Valid, 5171 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:52:06,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1922 Valid, 5171 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-21 01:52:06,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7038 states. [2021-11-21 01:52:06,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7038 to 7038. [2021-11-21 01:52:06,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7038 states, 4582 states have (on average 1.3808380619816674) internal successors, (6327), 4600 states have internal predecessors, (6327), 2032 states have call successors, (2032), 423 states have call predecessors, (2032), 421 states have return successors, (2024), 2014 states have call predecessors, (2024), 2024 states have call successors, (2024) [2021-11-21 01:52:06,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7038 states to 7038 states and 10383 transitions. [2021-11-21 01:52:06,902 INFO L78 Accepts]: Start accepts. Automaton has 7038 states and 10383 transitions. Word has length 262 [2021-11-21 01:52:06,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:52:06,903 INFO L470 AbstractCegarLoop]: Abstraction has 7038 states and 10383 transitions. [2021-11-21 01:52:06,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-21 01:52:06,904 INFO L276 IsEmpty]: Start isEmpty. Operand 7038 states and 10383 transitions. [2021-11-21 01:52:06,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-11-21 01:52:06,920 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:52:06,920 INFO L514 BasicCegarLoop]: trace histogram [21, 17, 17, 17, 17, 17, 17, 7, 6, 6, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:52:06,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 01:52:06,921 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:52:06,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:52:06,921 INFO L85 PathProgramCache]: Analyzing trace with hash 874624264, now seen corresponding path program 1 times [2021-11-21 01:52:06,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:52:06,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481437248] [2021-11-21 01:52:06,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:52:06,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:52:07,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:52:07,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1343 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 1331 trivial. 0 not checked. [2021-11-21 01:52:07,203 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:52:07,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481437248] [2021-11-21 01:52:07,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481437248] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:52:07,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:52:07,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:52:07,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580998754] [2021-11-21 01:52:07,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:52:07,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:52:07,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:52:07,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:52:07,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:52:07,207 INFO L87 Difference]: Start difference. First operand 7038 states and 10383 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (36), 3 states have call predecessors, (36), 1 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-21 01:52:09,172 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:52:10,770 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:52:12,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:52:12,480 INFO L93 Difference]: Finished difference Result 7048 states and 10392 transitions. [2021-11-21 01:52:12,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:52:12,481 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 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 269 [2021-11-21 01:52:12,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:52:12,515 INFO L225 Difference]: With dead ends: 7048 [2021-11-21 01:52:12,515 INFO L226 Difference]: Without dead ends: 7046 [2021-11-21 01:52:12,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:52:12,521 INFO L933 BasicCegarLoop]: 1730 mSDtfsCounter, 1915 mSDsluCounter, 3953 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1920 SdHoareTripleChecker+Valid, 5171 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:52:12,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1920 Valid, 5171 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2021-11-21 01:52:12,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7046 states. [2021-11-21 01:52:12,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7046 to 7046. [2021-11-21 01:52:12,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7046 states, 4588 states have (on average 1.3803400174367917) internal successors, (6333), 4606 states have internal predecessors, (6333), 2032 states have call successors, (2032), 425 states have call predecessors, (2032), 423 states have return successors, (2024), 2014 states have call predecessors, (2024), 2024 states have call successors, (2024) [2021-11-21 01:52:13,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7046 states to 7046 states and 10389 transitions. [2021-11-21 01:52:13,026 INFO L78 Accepts]: Start accepts. Automaton has 7046 states and 10389 transitions. Word has length 269 [2021-11-21 01:52:13,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:52:13,027 INFO L470 AbstractCegarLoop]: Abstraction has 7046 states and 10389 transitions. [2021-11-21 01:52:13,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (36), 3 states have call predecessors, (36), 1 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-21 01:52:13,027 INFO L276 IsEmpty]: Start isEmpty. Operand 7046 states and 10389 transitions. [2021-11-21 01:52:13,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-11-21 01:52:13,043 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:52:13,044 INFO L514 BasicCegarLoop]: trace histogram [22, 17, 17, 17, 17, 17, 17, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:52:13,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-21 01:52:13,045 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:52:13,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:52:13,045 INFO L85 PathProgramCache]: Analyzing trace with hash 160231278, now seen corresponding path program 1 times [2021-11-21 01:52:13,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:52:13,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472316741] [2021-11-21 01:52:13,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:52:13,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:52:13,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:52:13,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1304 trivial. 0 not checked. [2021-11-21 01:52:13,254 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:52:13,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472316741] [2021-11-21 01:52:13,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472316741] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:52:13,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:52:13,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:52:13,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111367337] [2021-11-21 01:52:13,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:52:13,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:52:13,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:52:13,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:52:13,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:52:13,257 INFO L87 Difference]: Start difference. First operand 7046 states and 10389 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-21 01:52:16,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:52:16,179 INFO L93 Difference]: Finished difference Result 14315 states and 21090 transitions. [2021-11-21 01:52:16,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:52:16,180 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 263 [2021-11-21 01:52:16,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:52:16,235 INFO L225 Difference]: With dead ends: 14315 [2021-11-21 01:52:16,236 INFO L226 Difference]: Without dead ends: 9440 [2021-11-21 01:52:16,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:52:16,269 INFO L933 BasicCegarLoop]: 3252 mSDtfsCounter, 1762 mSDsluCounter, 1912 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1762 SdHoareTripleChecker+Valid, 4942 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:52:16,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1762 Valid, 4942 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-21 01:52:16,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9440 states. [2021-11-21 01:52:17,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9440 to 9340. [2021-11-21 01:52:17,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9340 states, 6089 states have (on average 1.383478403678765) internal successors, (8424), 6117 states have internal predecessors, (8424), 2685 states have call successors, (2685), 565 states have call predecessors, (2685), 563 states have return successors, (2677), 2657 states have call predecessors, (2677), 2677 states have call successors, (2677) [2021-11-21 01:52:17,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9340 states to 9340 states and 13786 transitions. [2021-11-21 01:52:17,079 INFO L78 Accepts]: Start accepts. Automaton has 9340 states and 13786 transitions. Word has length 263 [2021-11-21 01:52:17,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:52:17,080 INFO L470 AbstractCegarLoop]: Abstraction has 9340 states and 13786 transitions. [2021-11-21 01:52:17,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-21 01:52:17,080 INFO L276 IsEmpty]: Start isEmpty. Operand 9340 states and 13786 transitions. [2021-11-21 01:52:17,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-11-21 01:52:17,098 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:52:17,099 INFO L514 BasicCegarLoop]: trace histogram [21, 17, 17, 17, 17, 17, 17, 8, 7, 7, 4, 4, 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] [2021-11-21 01:52:17,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-21 01:52:17,100 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:52:17,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:52:17,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1688232432, now seen corresponding path program 1 times [2021-11-21 01:52:17,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:52:17,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049717126] [2021-11-21 01:52:17,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:52:17,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:52:17,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:52:17,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1363 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1349 trivial. 0 not checked. [2021-11-21 01:52:17,408 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:52:17,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049717126] [2021-11-21 01:52:17,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049717126] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:52:17,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:52:17,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:52:17,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882126718] [2021-11-21 01:52:17,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:52:17,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:52:17,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:52:17,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:52:17,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:52:17,412 INFO L87 Difference]: Start difference. First operand 9340 states and 13786 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-21 01:52:19,510 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:52:21,533 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:52:23,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:52:23,070 INFO L93 Difference]: Finished difference Result 9350 states and 13795 transitions. [2021-11-21 01:52:23,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:52:23,071 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 272 [2021-11-21 01:52:23,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:52:23,119 INFO L225 Difference]: With dead ends: 9350 [2021-11-21 01:52:23,119 INFO L226 Difference]: Without dead ends: 9348 [2021-11-21 01:52:23,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:52:23,125 INFO L933 BasicCegarLoop]: 1730 mSDtfsCounter, 1916 mSDsluCounter, 3953 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1920 SdHoareTripleChecker+Valid, 5171 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:52:23,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1920 Valid, 5171 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2021-11-21 01:52:23,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9348 states. [2021-11-21 01:52:23,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9348 to 9348. [2021-11-21 01:52:23,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9348 states, 6095 states have (on average 1.383100902378999) internal successors, (8430), 6123 states have internal predecessors, (8430), 2685 states have call successors, (2685), 567 states have call predecessors, (2685), 565 states have return successors, (2677), 2657 states have call predecessors, (2677), 2677 states have call successors, (2677) [2021-11-21 01:52:23,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9348 states to 9348 states and 13792 transitions. [2021-11-21 01:52:23,726 INFO L78 Accepts]: Start accepts. Automaton has 9348 states and 13792 transitions. Word has length 272 [2021-11-21 01:52:23,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:52:23,727 INFO L470 AbstractCegarLoop]: Abstraction has 9348 states and 13792 transitions. [2021-11-21 01:52:23,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-21 01:52:23,727 INFO L276 IsEmpty]: Start isEmpty. Operand 9348 states and 13792 transitions. [2021-11-21 01:52:23,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2021-11-21 01:52:23,745 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:52:23,745 INFO L514 BasicCegarLoop]: trace histogram [21, 17, 17, 17, 17, 17, 17, 9, 8, 8, 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] [2021-11-21 01:52:23,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-21 01:52:23,746 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:52:23,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:52:23,746 INFO L85 PathProgramCache]: Analyzing trace with hash -408200386, now seen corresponding path program 1 times [2021-11-21 01:52:23,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:52:23,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171041642] [2021-11-21 01:52:23,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:52:23,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:52:23,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:52:24,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1398 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 1382 trivial. 0 not checked. [2021-11-21 01:52:24,044 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:52:24,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171041642] [2021-11-21 01:52:24,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171041642] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:52:24,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:52:24,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:52:24,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273107677] [2021-11-21 01:52:24,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:52:24,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:52:24,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:52:24,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:52:24,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:52:24,047 INFO L87 Difference]: Start difference. First operand 9348 states and 13792 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-21 01:52:26,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:52:26,743 INFO L93 Difference]: Finished difference Result 9358 states and 13801 transitions. [2021-11-21 01:52:26,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:52:26,744 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 278 [2021-11-21 01:52:26,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:52:26,793 INFO L225 Difference]: With dead ends: 9358 [2021-11-21 01:52:26,793 INFO L226 Difference]: Without dead ends: 9356 [2021-11-21 01:52:26,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:52:26,801 INFO L933 BasicCegarLoop]: 1730 mSDtfsCounter, 1915 mSDsluCounter, 3953 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1918 SdHoareTripleChecker+Valid, 5171 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:52:26,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1918 Valid, 5171 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-21 01:52:26,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9356 states. [2021-11-21 01:52:27,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9356 to 9356. [2021-11-21 01:52:27,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9356 states, 6101 states have (on average 1.382724143583019) internal successors, (8436), 6129 states have internal predecessors, (8436), 2685 states have call successors, (2685), 569 states have call predecessors, (2685), 567 states have return successors, (2677), 2657 states have call predecessors, (2677), 2677 states have call successors, (2677) [2021-11-21 01:52:27,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9356 states to 9356 states and 13798 transitions. [2021-11-21 01:52:27,411 INFO L78 Accepts]: Start accepts. Automaton has 9356 states and 13798 transitions. Word has length 278 [2021-11-21 01:52:27,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:52:27,412 INFO L470 AbstractCegarLoop]: Abstraction has 9356 states and 13798 transitions. [2021-11-21 01:52:27,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-21 01:52:27,412 INFO L276 IsEmpty]: Start isEmpty. Operand 9356 states and 13798 transitions. [2021-11-21 01:52:27,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2021-11-21 01:52:27,431 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:52:27,432 INFO L514 BasicCegarLoop]: trace histogram [21, 17, 17, 17, 17, 17, 17, 10, 9, 9, 4, 4, 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] [2021-11-21 01:52:27,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-21 01:52:27,432 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:52:27,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:52:27,433 INFO L85 PathProgramCache]: Analyzing trace with hash -716153648, now seen corresponding path program 1 times [2021-11-21 01:52:27,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:52:27,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138993503] [2021-11-21 01:52:27,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:52:27,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:52:27,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:52:27,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1427 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 1409 trivial. 0 not checked. [2021-11-21 01:52:27,711 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:52:27,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138993503] [2021-11-21 01:52:27,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138993503] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:52:27,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:52:27,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:52:27,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916883825] [2021-11-21 01:52:27,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:52:27,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:52:27,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:52:27,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:52:27,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:52:27,714 INFO L87 Difference]: Start difference. First operand 9356 states and 13798 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-21 01:52:30,018 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:52:32,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:52:32,109 INFO L93 Difference]: Finished difference Result 13355 states and 19674 transitions. [2021-11-21 01:52:32,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:52:32,109 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 282 [2021-11-21 01:52:32,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:52:32,200 INFO L225 Difference]: With dead ends: 13355 [2021-11-21 01:52:32,200 INFO L226 Difference]: Without dead ends: 13353 [2021-11-21 01:52:32,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:52:32,211 INFO L933 BasicCegarLoop]: 2135 mSDtfsCounter, 1839 mSDsluCounter, 6572 mSDsCounter, 0 mSdLazyCounter, 1069 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1841 SdHoareTripleChecker+Valid, 7928 SdHoareTripleChecker+Invalid, 1073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1069 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:52:32,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1841 Valid, 7928 Invalid, 1073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1069 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2021-11-21 01:52:32,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13353 states. [2021-11-21 01:52:33,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13353 to 13345. [2021-11-21 01:52:33,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13345 states, 8695 states have (on average 1.3820586543990798) internal successors, (12017), 8738 states have internal predecessors, (12017), 3820 states have call successors, (3820), 839 states have call predecessors, (3820), 827 states have return successors, (3828), 3767 states have call predecessors, (3828), 3808 states have call successors, (3828) [2021-11-21 01:52:33,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13345 states to 13345 states and 19665 transitions. [2021-11-21 01:52:33,277 INFO L78 Accepts]: Start accepts. Automaton has 13345 states and 19665 transitions. Word has length 282 [2021-11-21 01:52:33,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:52:33,278 INFO L470 AbstractCegarLoop]: Abstraction has 13345 states and 19665 transitions. [2021-11-21 01:52:33,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-21 01:52:33,278 INFO L276 IsEmpty]: Start isEmpty. Operand 13345 states and 19665 transitions. [2021-11-21 01:52:33,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2021-11-21 01:52:33,300 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:52:33,300 INFO L514 BasicCegarLoop]: trace histogram [23, 17, 17, 17, 17, 17, 17, 5, 5, 3, 3, 3, 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] [2021-11-21 01:52:33,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-21 01:52:33,301 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:52:33,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:52:33,301 INFO L85 PathProgramCache]: Analyzing trace with hash -195435033, now seen corresponding path program 1 times [2021-11-21 01:52:33,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:52:33,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18256637] [2021-11-21 01:52:33,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:52:33,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:52:33,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:52:33,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1357 trivial. 0 not checked. [2021-11-21 01:52:33,659 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:52:33,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18256637] [2021-11-21 01:52:33,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18256637] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:52:33,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:52:33,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:52:33,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032293176] [2021-11-21 01:52:33,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:52:33,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:52:33,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:52:33,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:52:33,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:52:33,663 INFO L87 Difference]: Start difference. First operand 13345 states and 19665 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (36), 3 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-21 01:52:35,574 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:52:37,598 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:52:39,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:52:39,283 INFO L93 Difference]: Finished difference Result 33216 states and 48986 transitions. [2021-11-21 01:52:39,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:52:39,284 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (36), 3 states have call predecessors, (36), 3 states have call successors, (36) Word has length 286 [2021-11-21 01:52:39,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:52:39,377 INFO L225 Difference]: With dead ends: 33216 [2021-11-21 01:52:39,377 INFO L226 Difference]: Without dead ends: 19906 [2021-11-21 01:52:39,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:52:39,449 INFO L933 BasicCegarLoop]: 2094 mSDtfsCounter, 1636 mSDsluCounter, 1949 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1636 SdHoareTripleChecker+Valid, 3806 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:52:39,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1636 Valid, 3806 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 540 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2021-11-21 01:52:39,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19906 states. [2021-11-21 01:52:40,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19906 to 19717. [2021-11-21 01:52:40,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19717 states, 12816 states have (on average 1.386001872659176) internal successors, (17763), 12921 states have internal predecessors, (17763), 5678 states have call successors, (5678), 1237 states have call predecessors, (5678), 1220 states have return successors, (5690), 5558 states have call predecessors, (5690), 5666 states have call successors, (5690) [2021-11-21 01:52:40,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19717 states to 19717 states and 29131 transitions. [2021-11-21 01:52:40,764 INFO L78 Accepts]: Start accepts. Automaton has 19717 states and 29131 transitions. Word has length 286 [2021-11-21 01:52:40,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:52:40,765 INFO L470 AbstractCegarLoop]: Abstraction has 19717 states and 29131 transitions. [2021-11-21 01:52:40,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (36), 3 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-21 01:52:40,765 INFO L276 IsEmpty]: Start isEmpty. Operand 19717 states and 29131 transitions. [2021-11-21 01:52:40,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2021-11-21 01:52:40,792 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:52:40,793 INFO L514 BasicCegarLoop]: trace histogram [21, 17, 17, 17, 17, 17, 17, 11, 10, 10, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:52:40,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-21 01:52:40,793 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:52:40,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:52:40,794 INFO L85 PathProgramCache]: Analyzing trace with hash 269162184, now seen corresponding path program 1 times [2021-11-21 01:52:40,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:52:40,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812638859] [2021-11-21 01:52:40,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:52:40,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:52:40,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:52:41,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1471 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 1451 trivial. 0 not checked. [2021-11-21 01:52:41,095 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:52:41,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812638859] [2021-11-21 01:52:41,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812638859] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:52:41,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:52:41,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:52:41,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681229427] [2021-11-21 01:52:41,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:52:41,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:52:41,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:52:41,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:52:41,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:52:41,098 INFO L87 Difference]: Start difference. First operand 19717 states and 29131 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 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) [2021-11-21 01:52:43,968 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:52:45,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:52:45,772 INFO L93 Difference]: Finished difference Result 19731 states and 29144 transitions. [2021-11-21 01:52:45,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:52:45,784 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 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 289 [2021-11-21 01:52:45,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:52:45,870 INFO L225 Difference]: With dead ends: 19731 [2021-11-21 01:52:45,871 INFO L226 Difference]: Without dead ends: 19727 [2021-11-21 01:52:45,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:52:45,883 INFO L933 BasicCegarLoop]: 1730 mSDtfsCounter, 1915 mSDsluCounter, 3953 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1916 SdHoareTripleChecker+Valid, 5171 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:52:45,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1916 Valid, 5171 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-11-21 01:52:45,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19727 states. [2021-11-21 01:52:47,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19727 to 19727. [2021-11-21 01:52:47,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19727 states, 12824 states have (on average 1.385683094198378) internal successors, (17770), 12928 states have internal predecessors, (17770), 5678 states have call successors, (5678), 1240 states have call predecessors, (5678), 1222 states have return successors, (5690), 5558 states have call predecessors, (5690), 5666 states have call successors, (5690) [2021-11-21 01:52:47,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19727 states to 19727 states and 29138 transitions. [2021-11-21 01:52:47,188 INFO L78 Accepts]: Start accepts. Automaton has 19727 states and 29138 transitions. Word has length 289 [2021-11-21 01:52:47,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:52:47,189 INFO L470 AbstractCegarLoop]: Abstraction has 19727 states and 29138 transitions. [2021-11-21 01:52:47,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 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) [2021-11-21 01:52:47,189 INFO L276 IsEmpty]: Start isEmpty. Operand 19727 states and 29138 transitions. [2021-11-21 01:52:47,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2021-11-21 01:52:47,209 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:52:47,210 INFO L514 BasicCegarLoop]: trace histogram [24, 17, 17, 17, 17, 17, 17, 4, 4, 4, 4, 4, 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] [2021-11-21 01:52:47,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-21 01:52:47,210 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:52:47,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:52:47,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1557382474, now seen corresponding path program 1 times [2021-11-21 01:52:47,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:52:47,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572848171] [2021-11-21 01:52:47,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:52:47,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:52:47,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:52:47,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1415 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1401 trivial. 0 not checked. [2021-11-21 01:52:47,477 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:52:47,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572848171] [2021-11-21 01:52:47,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572848171] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:52:47,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:52:47,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:52:47,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663626584] [2021-11-21 01:52:47,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:52:47,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:52:47,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:52:47,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:52:47,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:52:47,483 INFO L87 Difference]: Start difference. First operand 19727 states and 29138 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-21 01:52:50,726 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:52:53,651 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:52:57,039 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:52:59,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:52:59,429 INFO L93 Difference]: Finished difference Result 44556 states and 65694 transitions. [2021-11-21 01:52:59,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:52:59,430 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) Word has length 284 [2021-11-21 01:52:59,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:52:59,538 INFO L225 Difference]: With dead ends: 44556 [2021-11-21 01:52:59,538 INFO L226 Difference]: Without dead ends: 25747 [2021-11-21 01:52:59,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:52:59,616 INFO L933 BasicCegarLoop]: 3251 mSDtfsCounter, 1711 mSDsluCounter, 9291 mSDsCounter, 0 mSdLazyCounter, 1647 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1711 SdHoareTripleChecker+Valid, 11445 SdHoareTripleChecker+Invalid, 1651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1647 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:52:59,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1711 Valid, 11445 Invalid, 1651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1647 Invalid, 3 Unknown, 0 Unchecked, 10.8s Time] [2021-11-21 01:52:59,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25747 states. [2021-11-21 01:53:01,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25747 to 25542. [2021-11-21 01:53:01,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25542 states, 16566 states have (on average 1.3828926717372934) internal successors, (22909), 16707 states have internal predecessors, (22909), 7379 states have call successors, (7379), 1610 states have call predecessors, (7379), 1594 states have return successors, (7405), 7224 states have call predecessors, (7405), 7367 states have call successors, (7405) [2021-11-21 01:53:01,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25542 states to 25542 states and 37693 transitions. [2021-11-21 01:53:01,589 INFO L78 Accepts]: Start accepts. Automaton has 25542 states and 37693 transitions. Word has length 284 [2021-11-21 01:53:01,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:53:01,591 INFO L470 AbstractCegarLoop]: Abstraction has 25542 states and 37693 transitions. [2021-11-21 01:53:01,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-21 01:53:01,591 INFO L276 IsEmpty]: Start isEmpty. Operand 25542 states and 37693 transitions. [2021-11-21 01:53:01,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2021-11-21 01:53:01,616 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:53:01,617 INFO L514 BasicCegarLoop]: trace histogram [24, 17, 17, 17, 17, 17, 17, 4, 4, 4, 4, 4, 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] [2021-11-21 01:53:01,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-21 01:53:01,617 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:53:01,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:53:01,618 INFO L85 PathProgramCache]: Analyzing trace with hash 686726935, now seen corresponding path program 1 times [2021-11-21 01:53:01,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:53:01,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944017551] [2021-11-21 01:53:01,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:53:01,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:53:01,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:53:01,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1415 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1401 trivial. 0 not checked. [2021-11-21 01:53:01,852 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:53:01,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944017551] [2021-11-21 01:53:01,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944017551] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:53:01,852 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:53:01,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:53:01,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080878263] [2021-11-21 01:53:01,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:53:01,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:53:01,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:53:01,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:53:01,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:53:01,855 INFO L87 Difference]: Start difference. First operand 25542 states and 37693 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-21 01:53:04,897 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:53:06,626 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:53:10,734 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:53:15,380 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:53:15,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:53:15,627 INFO L93 Difference]: Finished difference Result 56198 states and 82832 transitions. [2021-11-21 01:53:15,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:53:15,628 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) Word has length 285 [2021-11-21 01:53:15,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:53:15,747 INFO L225 Difference]: With dead ends: 56198 [2021-11-21 01:53:15,747 INFO L226 Difference]: Without dead ends: 31574 [2021-11-21 01:53:15,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:53:15,820 INFO L933 BasicCegarLoop]: 3257 mSDtfsCounter, 1708 mSDsluCounter, 9299 mSDsCounter, 0 mSdLazyCounter, 1651 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1709 SdHoareTripleChecker+Valid, 11463 SdHoareTripleChecker+Invalid, 1655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1651 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:53:15,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1709 Valid, 11463 Invalid, 1655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1651 Invalid, 2 Unknown, 0 Unchecked, 12.3s Time] [2021-11-21 01:53:15,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31574 states. [2021-11-21 01:53:17,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31574 to 31369. [2021-11-21 01:53:17,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31369 states, 20320 states have (on average 1.3809055118110236) internal successors, (28060), 20498 states have internal predecessors, (28060), 9080 states have call successors, (9080), 1980 states have call predecessors, (9080), 1966 states have return successors, (9124), 8890 states have call predecessors, (9124), 9068 states have call successors, (9124) [2021-11-21 01:53:17,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31369 states to 31369 states and 46264 transitions. [2021-11-21 01:53:17,891 INFO L78 Accepts]: Start accepts. Automaton has 31369 states and 46264 transitions. Word has length 285 [2021-11-21 01:53:17,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:53:17,892 INFO L470 AbstractCegarLoop]: Abstraction has 31369 states and 46264 transitions. [2021-11-21 01:53:17,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-21 01:53:17,893 INFO L276 IsEmpty]: Start isEmpty. Operand 31369 states and 46264 transitions. [2021-11-21 01:53:17,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2021-11-21 01:53:17,911 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:53:17,911 INFO L514 BasicCegarLoop]: trace histogram [21, 17, 17, 17, 17, 17, 17, 12, 11, 11, 4, 4, 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] [2021-11-21 01:53:17,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-21 01:53:17,912 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:53:17,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:53:17,912 INFO L85 PathProgramCache]: Analyzing trace with hash 945680304, now seen corresponding path program 1 times [2021-11-21 01:53:17,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:53:17,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146933830] [2021-11-21 01:53:17,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:53:17,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:53:18,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:53:18,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1507 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2021-11-21 01:53:18,206 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:53:18,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146933830] [2021-11-21 01:53:18,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146933830] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:53:18,206 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:53:18,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:53:18,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586681761] [2021-11-21 01:53:18,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:53:18,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:53:18,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:53:18,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:53:18,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:53:18,209 INFO L87 Difference]: Start difference. First operand 31369 states and 46264 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2021-11-21 01:53:20,063 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:53:21,804 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:53:24,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:53:24,379 INFO L93 Difference]: Finished difference Result 31379 states and 46273 transitions. [2021-11-21 01:53:24,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:53:24,380 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) Word has length 292 [2021-11-21 01:53:24,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:53:24,482 INFO L225 Difference]: With dead ends: 31379 [2021-11-21 01:53:24,482 INFO L226 Difference]: Without dead ends: 31159 [2021-11-21 01:53:24,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:53:24,495 INFO L933 BasicCegarLoop]: 1731 mSDtfsCounter, 1916 mSDsluCounter, 3955 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1916 SdHoareTripleChecker+Valid, 5174 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:53:24,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1916 Valid, 5174 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-11-21 01:53:24,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31159 states. [2021-11-21 01:53:26,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31159 to 31159. [2021-11-21 01:53:26,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31159 states, 20231 states have (on average 1.3810488853739311) internal successors, (27940), 20379 states have internal predecessors, (27940), 8992 states have call successors, (8992), 1946 states have call predecessors, (8992), 1933 states have return successors, (9040), 8833 states have call predecessors, (9040), 8984 states have call successors, (9040) [2021-11-21 01:53:26,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31159 states to 31159 states and 45972 transitions. [2021-11-21 01:53:26,790 INFO L78 Accepts]: Start accepts. Automaton has 31159 states and 45972 transitions. Word has length 292 [2021-11-21 01:53:26,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:53:26,791 INFO L470 AbstractCegarLoop]: Abstraction has 31159 states and 45972 transitions. [2021-11-21 01:53:26,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2021-11-21 01:53:26,791 INFO L276 IsEmpty]: Start isEmpty. Operand 31159 states and 45972 transitions. [2021-11-21 01:53:26,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2021-11-21 01:53:26,808 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:53:26,808 INFO L514 BasicCegarLoop]: trace histogram [24, 17, 17, 17, 17, 17, 17, 4, 4, 4, 4, 4, 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] [2021-11-21 01:53:26,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-21 01:53:26,809 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:53:26,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:53:26,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1497563314, now seen corresponding path program 1 times [2021-11-21 01:53:26,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:53:26,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284611458] [2021-11-21 01:53:26,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:53:26,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:53:26,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:53:27,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1415 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1401 trivial. 0 not checked. [2021-11-21 01:53:27,064 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:53:27,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284611458] [2021-11-21 01:53:27,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284611458] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:53:27,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:53:27,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:53:27,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069744425] [2021-11-21 01:53:27,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:53:27,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:53:27,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:53:27,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:53:27,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:53:27,068 INFO L87 Difference]: Start difference. First operand 31159 states and 45972 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-21 01:53:29,309 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:53:30,367 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:53:34,595 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:53:36,688 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:53:39,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:53:39,780 INFO L93 Difference]: Finished difference Result 67417 states and 99410 transitions. [2021-11-21 01:53:39,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:53:39,781 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) Word has length 286 [2021-11-21 01:53:39,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:53:39,904 INFO L225 Difference]: With dead ends: 67417 [2021-11-21 01:53:39,904 INFO L226 Difference]: Without dead ends: 37176 [2021-11-21 01:53:39,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:53:39,967 INFO L933 BasicCegarLoop]: 3247 mSDtfsCounter, 1716 mSDsluCounter, 9263 mSDsCounter, 0 mSdLazyCounter, 1658 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1717 SdHoareTripleChecker+Valid, 11419 SdHoareTripleChecker+Invalid, 1665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1658 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:53:39,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1717 Valid, 11419 Invalid, 1665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1658 Invalid, 1 Unknown, 0 Unchecked, 10.8s Time] [2021-11-21 01:53:39,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37176 states. [2021-11-21 01:53:42,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37176 to 37091. [2021-11-21 01:53:42,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37091 states, 24069 states have (on average 1.3793261041173293) internal successors, (33199), 24248 states have internal predecessors, (33199), 10701 states have call successors, (10701), 2329 states have call predecessors, (10701), 2318 states have return successors, (10767), 10513 states have call predecessors, (10767), 10693 states have call successors, (10767) [2021-11-21 01:53:42,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37091 states to 37091 states and 54667 transitions. [2021-11-21 01:53:42,527 INFO L78 Accepts]: Start accepts. Automaton has 37091 states and 54667 transitions. Word has length 286 [2021-11-21 01:53:42,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:53:42,528 INFO L470 AbstractCegarLoop]: Abstraction has 37091 states and 54667 transitions. [2021-11-21 01:53:42,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-21 01:53:42,528 INFO L276 IsEmpty]: Start isEmpty. Operand 37091 states and 54667 transitions. [2021-11-21 01:53:42,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2021-11-21 01:53:42,537 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:53:42,538 INFO L514 BasicCegarLoop]: trace histogram [24, 17, 17, 17, 17, 17, 17, 4, 4, 4, 4, 4, 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] [2021-11-21 01:53:42,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-21 01:53:42,538 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:53:42,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:53:42,539 INFO L85 PathProgramCache]: Analyzing trace with hash 83969720, now seen corresponding path program 1 times [2021-11-21 01:53:42,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:53:42,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216947644] [2021-11-21 01:53:42,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:53:42,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:53:42,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:53:42,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1415 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1401 trivial. 0 not checked. [2021-11-21 01:53:42,791 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:53:42,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216947644] [2021-11-21 01:53:42,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216947644] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:53:42,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:53:42,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:53:42,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759381643] [2021-11-21 01:53:42,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:53:42,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:53:42,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:53:42,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:53:42,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:53:42,794 INFO L87 Difference]: Start difference. First operand 37091 states and 54667 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-21 01:53:46,602 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:53:49,090 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:53:50,336 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:53:53,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:53:53,977 INFO L93 Difference]: Finished difference Result 79182 states and 116668 transitions. [2021-11-21 01:53:53,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:53:53,978 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) Word has length 287 [2021-11-21 01:53:53,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:53:54,159 INFO L225 Difference]: With dead ends: 79182 [2021-11-21 01:53:54,159 INFO L226 Difference]: Without dead ends: 43009 [2021-11-21 01:53:54,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:53:54,392 INFO L933 BasicCegarLoop]: 3247 mSDtfsCounter, 1709 mSDsluCounter, 9275 mSDsCounter, 0 mSdLazyCounter, 1666 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1709 SdHoareTripleChecker+Valid, 11427 SdHoareTripleChecker+Invalid, 1673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:53:54,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1709 Valid, 11427 Invalid, 1673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1666 Invalid, 0 Unknown, 0 Unchecked, 8.9s Time] [2021-11-21 01:53:54,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43009 states. [2021-11-21 01:53:56,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43009 to 42924. [2021-11-21 01:53:56,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42924 states, 27843 states have (on average 1.377868764141795) internal successors, (38364), 28053 states have internal predecessors, (38364), 12390 states have call successors, (12390), 2697 states have call predecessors, (12390), 2688 states have return successors, (12470), 12173 states have call predecessors, (12470), 12382 states have call successors, (12470) [2021-11-21 01:53:56,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42924 states to 42924 states and 63224 transitions. [2021-11-21 01:53:56,794 INFO L78 Accepts]: Start accepts. Automaton has 42924 states and 63224 transitions. Word has length 287 [2021-11-21 01:53:56,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:53:56,794 INFO L470 AbstractCegarLoop]: Abstraction has 42924 states and 63224 transitions. [2021-11-21 01:53:56,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-21 01:53:56,795 INFO L276 IsEmpty]: Start isEmpty. Operand 42924 states and 63224 transitions. [2021-11-21 01:53:56,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2021-11-21 01:53:56,808 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:53:56,809 INFO L514 BasicCegarLoop]: trace histogram [24, 17, 17, 17, 17, 17, 17, 4, 4, 4, 4, 4, 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] [2021-11-21 01:53:56,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-21 01:53:56,809 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:53:56,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:53:56,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1220690256, now seen corresponding path program 1 times [2021-11-21 01:53:56,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:53:56,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025170064] [2021-11-21 01:53:56,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:53:56,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:53:56,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:53:57,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1415 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1401 trivial. 0 not checked. [2021-11-21 01:53:57,089 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:53:57,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025170064] [2021-11-21 01:53:57,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025170064] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:53:57,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:53:57,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:53:57,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468195968] [2021-11-21 01:53:57,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:53:57,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:53:57,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:53:57,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:53:57,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:53:57,093 INFO L87 Difference]: Start difference. First operand 42924 states and 63224 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-21 01:53:59,719 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:54:01,757 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:54:04,732 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:54:10,687 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:54:12,778 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:54:13,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:54:13,121 INFO L93 Difference]: Finished difference Result 90854 states and 133794 transitions. [2021-11-21 01:54:13,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:54:13,122 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) Word has length 288 [2021-11-21 01:54:13,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:54:13,322 INFO L225 Difference]: With dead ends: 90854 [2021-11-21 01:54:13,322 INFO L226 Difference]: Without dead ends: 48848 [2021-11-21 01:54:13,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:54:13,439 INFO L933 BasicCegarLoop]: 3247 mSDtfsCounter, 1706 mSDsluCounter, 9277 mSDsCounter, 0 mSdLazyCounter, 1666 mSolverCounterSat, 7 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1706 SdHoareTripleChecker+Valid, 11429 SdHoareTripleChecker+Invalid, 1677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1666 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:54:13,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1706 Valid, 11429 Invalid, 1677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1666 Invalid, 4 Unknown, 0 Unchecked, 13.6s Time] [2021-11-21 01:54:13,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48848 states. [2021-11-21 01:54:16,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48848 to 48763. [2021-11-21 01:54:16,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48763 states, 31623 states have (on average 1.376687853777314) internal successors, (43535), 31864 states have internal predecessors, (43535), 14079 states have call successors, (14079), 3065 states have call predecessors, (14079), 3058 states have return successors, (14173), 13833 states have call predecessors, (14173), 14071 states have call successors, (14173) [2021-11-21 01:54:16,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48763 states to 48763 states and 71787 transitions. [2021-11-21 01:54:16,242 INFO L78 Accepts]: Start accepts. Automaton has 48763 states and 71787 transitions. Word has length 288 [2021-11-21 01:54:16,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:54:16,243 INFO L470 AbstractCegarLoop]: Abstraction has 48763 states and 71787 transitions. [2021-11-21 01:54:16,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-21 01:54:16,243 INFO L276 IsEmpty]: Start isEmpty. Operand 48763 states and 71787 transitions. [2021-11-21 01:54:16,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2021-11-21 01:54:16,254 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:54:16,254 INFO L514 BasicCegarLoop]: trace histogram [24, 17, 17, 17, 17, 17, 17, 4, 4, 4, 4, 4, 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] [2021-11-21 01:54:16,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-21 01:54:16,255 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:54:16,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:54:16,256 INFO L85 PathProgramCache]: Analyzing trace with hash -404672234, now seen corresponding path program 1 times [2021-11-21 01:54:16,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:54:16,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144523510] [2021-11-21 01:54:16,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:54:16,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:54:16,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:54:16,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1415 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1401 trivial. 0 not checked. [2021-11-21 01:54:16,482 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:54:16,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144523510] [2021-11-21 01:54:16,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144523510] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:54:16,483 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:54:16,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:54:16,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028566425] [2021-11-21 01:54:16,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:54:16,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:54:16,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:54:16,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:54:16,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:54:16,486 INFO L87 Difference]: Start difference. First operand 48763 states and 71787 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-21 01:54:19,795 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:54:21,708 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:54:26,024 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:54:28,141 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:54:32,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:54:32,443 INFO L93 Difference]: Finished difference Result 102538 states and 150936 transitions. [2021-11-21 01:54:32,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:54:32,446 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) Word has length 289 [2021-11-21 01:54:32,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:54:32,692 INFO L225 Difference]: With dead ends: 102538 [2021-11-21 01:54:32,692 INFO L226 Difference]: Without dead ends: 54693 [2021-11-21 01:54:32,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:54:32,804 INFO L933 BasicCegarLoop]: 3248 mSDtfsCounter, 1704 mSDsluCounter, 9274 mSDsCounter, 0 mSdLazyCounter, 1664 mSolverCounterSat, 8 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1705 SdHoareTripleChecker+Valid, 11432 SdHoareTripleChecker+Invalid, 1675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1664 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:54:32,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1705 Valid, 11432 Invalid, 1675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1664 Invalid, 3 Unknown, 0 Unchecked, 13.0s Time] [2021-11-21 01:54:32,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54693 states. [2021-11-21 01:54:35,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54693 to 54608. [2021-11-21 01:54:35,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54608 states, 35409 states have (on average 1.375695444660962) internal successors, (48712), 35681 states have internal predecessors, (48712), 15768 states have call successors, (15768), 3433 states have call predecessors, (15768), 3428 states have return successors, (15880), 15493 states have call predecessors, (15880), 15760 states have call successors, (15880) [2021-11-21 01:54:36,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54608 states to 54608 states and 80360 transitions. [2021-11-21 01:54:36,087 INFO L78 Accepts]: Start accepts. Automaton has 54608 states and 80360 transitions. Word has length 289 [2021-11-21 01:54:36,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:54:36,088 INFO L470 AbstractCegarLoop]: Abstraction has 54608 states and 80360 transitions. [2021-11-21 01:54:36,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-21 01:54:36,089 INFO L276 IsEmpty]: Start isEmpty. Operand 54608 states and 80360 transitions. [2021-11-21 01:54:36,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2021-11-21 01:54:36,108 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:54:36,109 INFO L514 BasicCegarLoop]: trace histogram [24, 17, 17, 17, 17, 17, 17, 4, 4, 4, 4, 4, 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] [2021-11-21 01:54:36,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-21 01:54:36,109 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:54:36,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:54:36,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1063696321, now seen corresponding path program 1 times [2021-11-21 01:54:36,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:54:36,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919597746] [2021-11-21 01:54:36,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:54:36,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:54:36,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:54:36,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1415 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1401 trivial. 0 not checked. [2021-11-21 01:54:36,707 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:54:36,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919597746] [2021-11-21 01:54:36,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919597746] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:54:36,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:54:36,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:54:36,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073032117] [2021-11-21 01:54:36,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:54:36,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:54:36,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:54:36,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:54:36,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:54:36,712 INFO L87 Difference]: Start difference. First operand 54608 states and 80360 transitions. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 states have internal predecessors, (90), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-21 01:54:39,177 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:54:44,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:54:44,429 INFO L93 Difference]: Finished difference Result 114173 states and 168001 transitions. [2021-11-21 01:54:44,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:54:44,430 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 states have internal predecessors, (90), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) Word has length 290 [2021-11-21 01:54:44,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:54:44,913 INFO L225 Difference]: With dead ends: 114173 [2021-11-21 01:54:44,913 INFO L226 Difference]: Without dead ends: 60483 [2021-11-21 01:54:45,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:54:45,083 INFO L933 BasicCegarLoop]: 3171 mSDtfsCounter, 1618 mSDsluCounter, 9098 mSDsCounter, 0 mSdLazyCounter, 1636 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1618 SdHoareTripleChecker+Valid, 11201 SdHoareTripleChecker+Invalid, 1646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1636 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:54:45,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1618 Valid, 11201 Invalid, 1646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1636 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2021-11-21 01:54:45,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60483 states.