./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-ethernet-qlogic-qla3xxx.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_107299b1-9252-4dbd-871f-f0f147adcb43/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_107299b1-9252-4dbd-871f-f0f147adcb43/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_107299b1-9252-4dbd-871f-f0f147adcb43/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_107299b1-9252-4dbd-871f-f0f147adcb43/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-qlogic-qla3xxx.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_107299b1-9252-4dbd-871f-f0f147adcb43/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_107299b1-9252-4dbd-871f-f0f147adcb43/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 5663310b82fa3e5d48c5bcacd13ac8ac886029c41a2f8f3bd2b8442c496a9447 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:27:13,117 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:27:13,119 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:27:13,171 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:27:13,172 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:27:13,178 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:27:13,181 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:27:13,186 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:27:13,190 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:27:13,196 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:27:13,197 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:27:13,200 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:27:13,200 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:27:13,203 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:27:13,207 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:27:13,211 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:27:13,214 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:27:13,215 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:27:13,218 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:27:13,227 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:27:13,229 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:27:13,230 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:27:13,234 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:27:13,235 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:27:13,238 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:27:13,239 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:27:13,239 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:27:13,241 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:27:13,242 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:27:13,244 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:27:13,244 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:27:13,245 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:27:13,247 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:27:13,249 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:27:13,251 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:27:13,251 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:27:13,252 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:27:13,252 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:27:13,252 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:27:13,254 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:27:13,255 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:27:13,256 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_107299b1-9252-4dbd-871f-f0f147adcb43/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 02:27:13,311 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:27:13,311 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:27:13,312 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:27:13,312 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:27:13,313 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:27:13,314 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:27:13,314 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:27:13,315 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:27:13,315 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:27:13,315 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:27:13,317 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:27:13,317 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:27:13,317 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:27:13,318 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:27:13,318 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:27:13,318 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:27:13,319 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:27:13,319 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:27:13,320 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:27:13,320 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:27:13,321 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:27:13,321 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:27:13,321 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:27:13,321 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:27:13,322 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:27:13,322 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:27:13,324 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:27:13,324 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:27:13,325 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:27:13,325 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:27:13,325 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:27:13,326 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:27:13,326 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:27:13,326 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:27:13,327 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:27:13,327 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:27:13,327 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:27:13,328 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:27:13,328 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_107299b1-9252-4dbd-871f-f0f147adcb43/bin/utaipan-EQgc7hIp5V/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_107299b1-9252-4dbd-871f-f0f147adcb43/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5663310b82fa3e5d48c5bcacd13ac8ac886029c41a2f8f3bd2b8442c496a9447 [2021-11-23 02:27:13,690 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:27:13,718 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:27:13,721 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:27:13,723 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:27:13,724 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:27:13,726 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_107299b1-9252-4dbd-871f-f0f147adcb43/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-qlogic-qla3xxx.cil.i [2021-11-23 02:27:13,820 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_107299b1-9252-4dbd-871f-f0f147adcb43/bin/utaipan-EQgc7hIp5V/data/f61ca1987/bd25781f04184fbb8902356c62bf0146/FLAG24652022f [2021-11-23 02:27:14,984 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:27:14,985 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_107299b1-9252-4dbd-871f-f0f147adcb43/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-qlogic-qla3xxx.cil.i [2021-11-23 02:27:15,040 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_107299b1-9252-4dbd-871f-f0f147adcb43/bin/utaipan-EQgc7hIp5V/data/f61ca1987/bd25781f04184fbb8902356c62bf0146/FLAG24652022f [2021-11-23 02:27:15,208 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_107299b1-9252-4dbd-871f-f0f147adcb43/bin/utaipan-EQgc7hIp5V/data/f61ca1987/bd25781f04184fbb8902356c62bf0146 [2021-11-23 02:27:15,210 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:27:15,212 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:27:15,216 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:27:15,216 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:27:15,220 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:27:15,222 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:27:15" (1/1) ... [2021-11-23 02:27:15,225 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ad1fcde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:15, skipping insertion in model container [2021-11-23 02:27:15,225 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:27:15" (1/1) ... [2021-11-23 02:27:15,235 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:27:15,439 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:27:20,059 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_107299b1-9252-4dbd-871f-f0f147adcb43/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-qlogic-qla3xxx.cil.i[408897,408910] [2021-11-23 02:27:20,063 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_107299b1-9252-4dbd-871f-f0f147adcb43/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-qlogic-qla3xxx.cil.i[409066,409079] [2021-11-23 02:27:20,063 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_107299b1-9252-4dbd-871f-f0f147adcb43/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-qlogic-qla3xxx.cil.i[409233,409246] [2021-11-23 02:27:20,064 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_107299b1-9252-4dbd-871f-f0f147adcb43/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-qlogic-qla3xxx.cil.i[409401,409414] [2021-11-23 02:27:20,098 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:27:20,140 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:27:20,696 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_107299b1-9252-4dbd-871f-f0f147adcb43/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-qlogic-qla3xxx.cil.i[408897,408910] [2021-11-23 02:27:20,697 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_107299b1-9252-4dbd-871f-f0f147adcb43/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-qlogic-qla3xxx.cil.i[409066,409079] [2021-11-23 02:27:20,697 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_107299b1-9252-4dbd-871f-f0f147adcb43/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-qlogic-qla3xxx.cil.i[409233,409246] [2021-11-23 02:27:20,698 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_107299b1-9252-4dbd-871f-f0f147adcb43/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-qlogic-qla3xxx.cil.i[409401,409414] [2021-11-23 02:27:20,710 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:27:20,992 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:27:20,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:20 WrapperNode [2021-11-23 02:27:20,993 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:27:20,994 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:27:20,994 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:27:20,994 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:27:21,002 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:20" (1/1) ... [2021-11-23 02:27:21,153 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:20" (1/1) ... [2021-11-23 02:27:21,437 INFO L137 Inliner]: procedures = 572, calls = 2923, calls flagged for inlining = 287, calls inlined = 255, statements flattened = 6555 [2021-11-23 02:27:21,438 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:27:21,439 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:27:21,439 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:27:21,440 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:27:21,449 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:20" (1/1) ... [2021-11-23 02:27:21,449 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:20" (1/1) ... [2021-11-23 02:27:21,506 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:20" (1/1) ... [2021-11-23 02:27:21,507 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:20" (1/1) ... [2021-11-23 02:27:21,749 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:20" (1/1) ... [2021-11-23 02:27:21,781 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:20" (1/1) ... [2021-11-23 02:27:21,809 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:20" (1/1) ... [2021-11-23 02:27:21,841 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:27:21,842 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:27:21,842 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:27:21,842 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:27:21,844 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:20" (1/1) ... [2021-11-23 02:27:21,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:27:21,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_107299b1-9252-4dbd-871f-f0f147adcb43/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:27:21,881 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_107299b1-9252-4dbd-871f-f0f147adcb43/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:27:21,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_107299b1-9252-4dbd-871f-f0f147adcb43/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:27:21,931 INFO L130 BoogieDeclarations]: Found specification of procedure ql_get_link_speed [2021-11-23 02:27:21,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_get_link_speed [2021-11-23 02:27:21,932 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_hw_lock_of_ql3_adapter [2021-11-23 02:27:21,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_hw_lock_of_ql3_adapter [2021-11-23 02:27:21,932 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2021-11-23 02:27:21,932 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2021-11-23 02:27:21,932 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-23 02:27:21,933 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-23 02:27:21,933 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_alloc_skb [2021-11-23 02:27:21,933 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_alloc_skb [2021-11-23 02:27:21,933 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_page [2021-11-23 02:27:21,933 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_page [2021-11-23 02:27:21,933 INFO L130 BoogieDeclarations]: Found specification of procedure ql3xxx_close [2021-11-23 02:27:21,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ql3xxx_close [2021-11-23 02:27:21,934 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 02:27:21,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 02:27:21,934 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2021-11-23 02:27:21,934 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2021-11-23 02:27:21,935 INFO L130 BoogieDeclarations]: Found specification of procedure cancel_delayed_work [2021-11-23 02:27:21,935 INFO L138 BoogieDeclarations]: Found implementation of procedure cancel_delayed_work [2021-11-23 02:27:21,935 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-23 02:27:21,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-23 02:27:21,935 INFO L130 BoogieDeclarations]: Found specification of procedure ql_this_adapter_controls_port [2021-11-23 02:27:21,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_this_adapter_controls_port [2021-11-23 02:27:21,936 INFO L130 BoogieDeclarations]: Found specification of procedure ql_enable_interrupts [2021-11-23 02:27:21,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_enable_interrupts [2021-11-23 02:27:21,936 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2021-11-23 02:27:21,936 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2021-11-23 02:27:21,936 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-11-23 02:27:21,937 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-11-23 02:27:21,937 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_61 [2021-11-23 02:27:21,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_61 [2021-11-23 02:27:21,937 INFO L130 BoogieDeclarations]: Found specification of procedure ql_read_common_reg_l [2021-11-23 02:27:21,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_read_common_reg_l [2021-11-23 02:27:21,937 INFO L130 BoogieDeclarations]: Found specification of procedure ql_free_send_free_list [2021-11-23 02:27:21,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_free_send_free_list [2021-11-23 02:27:21,938 INFO L130 BoogieDeclarations]: Found specification of procedure pci_name [2021-11-23 02:27:21,938 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_name [2021-11-23 02:27:21,938 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-23 02:27:21,938 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-23 02:27:21,939 INFO L130 BoogieDeclarations]: Found specification of procedure ssleep [2021-11-23 02:27:21,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ssleep [2021-11-23 02:27:21,939 INFO L130 BoogieDeclarations]: Found specification of procedure ql_cycle_adapter [2021-11-23 02:27:21,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_cycle_adapter [2021-11-23 02:27:21,939 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-23 02:27:21,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-23 02:27:21,940 INFO L130 BoogieDeclarations]: Found specification of procedure ql_mac_cfg_soft_reset [2021-11-23 02:27:21,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_mac_cfg_soft_reset [2021-11-23 02:27:21,940 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-11-23 02:27:21,940 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-11-23 02:27:21,940 INFO L130 BoogieDeclarations]: Found specification of procedure skb_end_pointer [2021-11-23 02:27:21,941 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_end_pointer [2021-11-23 02:27:21,941 INFO L130 BoogieDeclarations]: Found specification of procedure ql_mii_disable_scan_mode [2021-11-23 02:27:21,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_mii_disable_scan_mode [2021-11-23 02:27:21,941 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-23 02:27:21,941 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-23 02:27:21,941 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-23 02:27:21,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-23 02:27:21,942 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_single [2021-11-23 02:27:21,942 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_single [2021-11-23 02:27:21,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:27:21,942 INFO L130 BoogieDeclarations]: Found specification of procedure iounmap [2021-11-23 02:27:21,942 INFO L138 BoogieDeclarations]: Found implementation of procedure iounmap [2021-11-23 02:27:21,943 INFO L130 BoogieDeclarations]: Found specification of procedure ql_read_page0_reg_l [2021-11-23 02:27:21,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_read_page0_reg_l [2021-11-23 02:27:21,943 INFO L130 BoogieDeclarations]: Found specification of procedure ql_adapter_up [2021-11-23 02:27:21,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_adapter_up [2021-11-23 02:27:21,943 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-23 02:27:21,944 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-23 02:27:21,944 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_consistent_dma_mask [2021-11-23 02:27:21,944 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_consistent_dma_mask [2021-11-23 02:27:21,944 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-23 02:27:21,944 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-23 02:27:21,944 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-23 02:27:21,945 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-23 02:27:21,945 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-23 02:27:21,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-23 02:27:21,945 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-23 02:27:21,945 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-23 02:27:21,945 INFO L130 BoogieDeclarations]: Found specification of procedure ql_write_page1_reg [2021-11-23 02:27:21,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_write_page1_reg [2021-11-23 02:27:21,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:27:21,946 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2021-11-23 02:27:21,946 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2021-11-23 02:27:21,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-23 02:27:21,947 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-23 02:27:21,947 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_interrupt_context [2021-11-23 02:27:21,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_interrupt_context [2021-11-23 02:27:21,948 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2021-11-23 02:27:21,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2021-11-23 02:27:21,948 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2021-11-23 02:27:21,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2021-11-23 02:27:21,948 INFO L130 BoogieDeclarations]: Found specification of procedure dev_close [2021-11-23 02:27:21,948 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_close [2021-11-23 02:27:21,948 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_dma_mask [2021-11-23 02:27:21,949 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_dma_mask [2021-11-23 02:27:21,949 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_hw_lock_of_ql3_adapter [2021-11-23 02:27:21,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_hw_lock_of_ql3_adapter [2021-11-23 02:27:21,949 INFO L130 BoogieDeclarations]: Found specification of procedure ql_set_register_page [2021-11-23 02:27:21,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_set_register_page [2021-11-23 02:27:21,950 INFO L130 BoogieDeclarations]: Found specification of procedure pci_free_consistent [2021-11-23 02:27:21,950 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_free_consistent [2021-11-23 02:27:21,950 INFO L130 BoogieDeclarations]: Found specification of procedure ql_mii_read_reg_ex [2021-11-23 02:27:21,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_mii_read_reg_ex [2021-11-23 02:27:21,951 INFO L130 BoogieDeclarations]: Found specification of procedure ql_phy_init_ex [2021-11-23 02:27:21,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_phy_init_ex [2021-11-23 02:27:21,955 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-23 02:27:21,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-23 02:27:21,955 INFO L130 BoogieDeclarations]: Found specification of procedure ql_write_common_reg_l [2021-11-23 02:27:21,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_write_common_reg_l [2021-11-23 02:27:21,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:27:21,956 INFO L130 BoogieDeclarations]: Found specification of procedure ql_write_common_reg [2021-11-23 02:27:21,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_write_common_reg [2021-11-23 02:27:21,957 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_1 [2021-11-23 02:27:21,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_1 [2021-11-23 02:27:21,962 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_0 [2021-11-23 02:27:21,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_0 [2021-11-23 02:27:21,963 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mod_timer [2021-11-23 02:27:21,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mod_timer [2021-11-23 02:27:21,963 INFO L130 BoogieDeclarations]: Found specification of procedure ql_sem_spinlock [2021-11-23 02:27:21,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_sem_spinlock [2021-11-23 02:27:21,963 INFO L130 BoogieDeclarations]: Found specification of procedure ql_write_page2_reg [2021-11-23 02:27:21,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_write_page2_reg [2021-11-23 02:27:21,964 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:27:21,964 INFO L130 BoogieDeclarations]: Found specification of procedure ql_read_common_reg [2021-11-23 02:27:21,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_read_common_reg [2021-11-23 02:27:21,964 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-23 02:27:21,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-23 02:27:21,964 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-23 02:27:21,964 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-23 02:27:21,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:27:21,965 INFO L130 BoogieDeclarations]: Found specification of procedure ql_mii_read_reg [2021-11-23 02:27:21,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_mii_read_reg [2021-11-23 02:27:21,965 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-23 02:27:21,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-23 02:27:21,965 INFO L130 BoogieDeclarations]: Found specification of procedure ql_sem_unlock [2021-11-23 02:27:21,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_sem_unlock [2021-11-23 02:27:21,965 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-23 02:27:21,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-23 02:27:21,966 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2021-11-23 02:27:21,966 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2021-11-23 02:27:21,966 INFO L130 BoogieDeclarations]: Found specification of procedure ql_write_nvram_reg [2021-11-23 02:27:21,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_write_nvram_reg [2021-11-23 02:27:21,966 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_spin_lock [2021-11-23 02:27:21,966 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_spin_lock [2021-11-23 02:27:21,966 INFO L130 BoogieDeclarations]: Found specification of procedure __init_work [2021-11-23 02:27:21,966 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_work [2021-11-23 02:27:21,967 INFO L130 BoogieDeclarations]: Found specification of procedure debug_dma_map_page [2021-11-23 02:27:21,967 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_dma_map_page [2021-11-23 02:27:21,967 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-23 02:27:21,967 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-23 02:27:21,967 INFO L130 BoogieDeclarations]: Found specification of procedure ql_wait_for_drvr_lock [2021-11-23 02:27:21,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_wait_for_drvr_lock [2021-11-23 02:27:21,967 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2021-11-23 02:27:21,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2021-11-23 02:27:21,968 INFO L130 BoogieDeclarations]: Found specification of procedure skb_frag_size [2021-11-23 02:27:21,968 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_frag_size [2021-11-23 02:27:21,968 INFO L130 BoogieDeclarations]: Found specification of procedure ql_mii_enable_scan_mode [2021-11-23 02:27:21,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_mii_enable_scan_mode [2021-11-23 02:27:21,968 INFO L130 BoogieDeclarations]: Found specification of procedure queue_delayed_work [2021-11-23 02:27:21,968 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_delayed_work [2021-11-23 02:27:21,969 INFO L130 BoogieDeclarations]: Found specification of procedure writel [2021-11-23 02:27:21,969 INFO L138 BoogieDeclarations]: Found implementation of procedure writel [2021-11-23 02:27:21,969 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-23 02:27:21,969 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-23 02:27:21,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:27:21,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:27:21,969 INFO L130 BoogieDeclarations]: Found specification of procedure ql_wait_for_mii_ready [2021-11-23 02:27:21,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_wait_for_mii_ready [2021-11-23 02:27:21,970 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2021-11-23 02:27:21,970 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2021-11-23 02:27:21,970 INFO L130 BoogieDeclarations]: Found specification of procedure ql_free_large_buffers [2021-11-23 02:27:21,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_free_large_buffers [2021-11-23 02:27:21,970 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-23 02:27:21,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 02:27:21,970 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-23 02:27:21,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-23 02:27:21,971 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~int~X~int~X~$Pointer$~TO~~dma_addr_t~0 [2021-11-23 02:27:21,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~int~X~int~X~$Pointer$~TO~~dma_addr_t~0 [2021-11-23 02:27:21,971 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-23 02:27:21,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-23 02:27:21,973 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_off [2021-11-23 02:27:21,973 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_off [2021-11-23 02:27:21,973 INFO L130 BoogieDeclarations]: Found specification of procedure ql_disable_interrupts [2021-11-23 02:27:21,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_disable_interrupts [2021-11-23 02:27:21,974 INFO L130 BoogieDeclarations]: Found specification of procedure rtnl_unlock [2021-11-23 02:27:21,974 INFO L138 BoogieDeclarations]: Found implementation of procedure rtnl_unlock [2021-11-23 02:27:21,974 INFO L130 BoogieDeclarations]: Found specification of procedure kmemcheck_mark_initialized [2021-11-23 02:27:21,974 INFO L138 BoogieDeclarations]: Found implementation of procedure kmemcheck_mark_initialized [2021-11-23 02:27:21,974 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_process_context [2021-11-23 02:27:21,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_process_context [2021-11-23 02:27:21,974 INFO L130 BoogieDeclarations]: Found specification of procedure ql_read_page0_reg [2021-11-23 02:27:21,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_read_page0_reg [2021-11-23 02:27:21,975 INFO L130 BoogieDeclarations]: Found specification of procedure pci_map_single [2021-11-23 02:27:21,975 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_map_single [2021-11-23 02:27:21,975 INFO L130 BoogieDeclarations]: Found specification of procedure PHY_Setup [2021-11-23 02:27:21,975 INFO L138 BoogieDeclarations]: Found implementation of procedure PHY_Setup [2021-11-23 02:27:21,975 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-23 02:27:21,975 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-23 02:27:21,975 INFO L130 BoogieDeclarations]: Found specification of procedure ql_free_buffer_queues [2021-11-23 02:27:21,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_free_buffer_queues [2021-11-23 02:27:21,976 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-23 02:27:21,976 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-23 02:27:21,976 INFO L130 BoogieDeclarations]: Found specification of procedure pci_alloc_consistent [2021-11-23 02:27:21,976 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_alloc_consistent [2021-11-23 02:27:21,976 INFO L130 BoogieDeclarations]: Found specification of procedure debug_dma_unmap_page [2021-11-23 02:27:21,976 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_dma_unmap_page [2021-11-23 02:27:21,976 INFO L130 BoogieDeclarations]: Found specification of procedure ql3xxx_remove [2021-11-23 02:27:21,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ql3xxx_remove [2021-11-23 02:27:21,977 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2021-11-23 02:27:21,977 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2021-11-23 02:27:21,977 INFO L130 BoogieDeclarations]: Found specification of procedure __kmalloc [2021-11-23 02:27:21,977 INFO L138 BoogieDeclarations]: Found implementation of procedure __kmalloc [2021-11-23 02:27:21,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:27:21,977 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-23 02:27:21,977 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-23 02:27:21,977 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:27:21,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 02:27:21,978 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~structbegin~int~structend~~TO~int [2021-11-23 02:27:21,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~structbegin~int~structend~~TO~int [2021-11-23 02:27:21,978 INFO L130 BoogieDeclarations]: Found specification of procedure dma_mapping_error [2021-11-23 02:27:21,978 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_mapping_error [2021-11-23 02:27:21,978 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-23 02:27:21,978 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-23 02:27:21,978 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-23 02:27:21,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-23 02:27:21,979 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_init_map [2021-11-23 02:27:21,979 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_init_map [2021-11-23 02:27:21,979 INFO L130 BoogieDeclarations]: Found specification of procedure ql_write_page0_reg [2021-11-23 02:27:21,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_write_page0_reg [2021-11-23 02:27:21,979 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_irq [2021-11-23 02:27:21,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_irq [2021-11-23 02:27:21,980 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reserve [2021-11-23 02:27:21,985 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reserve [2021-11-23 02:27:21,985 INFO L130 BoogieDeclarations]: Found specification of procedure ql_is_link_full_dup [2021-11-23 02:27:21,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_is_link_full_dup [2021-11-23 02:27:21,985 INFO L130 BoogieDeclarations]: Found specification of procedure ql3xxx_open [2021-11-23 02:27:21,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ql3xxx_open [2021-11-23 02:27:21,986 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-23 02:27:21,986 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-23 02:27:21,986 INFO L130 BoogieDeclarations]: Found specification of procedure ql3xxx_tx_timeout [2021-11-23 02:27:21,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ql3xxx_tx_timeout [2021-11-23 02:27:21,988 INFO L130 BoogieDeclarations]: Found specification of procedure ql_supported_modes [2021-11-23 02:27:21,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_supported_modes [2021-11-23 02:27:21,988 INFO L130 BoogieDeclarations]: Found specification of procedure pci_dma_mapping_error [2021-11-23 02:27:21,988 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_dma_mapping_error [2021-11-23 02:27:21,988 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-23 02:27:21,988 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-23 02:27:21,989 INFO L130 BoogieDeclarations]: Found specification of procedure ql_is_fiber [2021-11-23 02:27:21,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_is_fiber [2021-11-23 02:27:21,989 INFO L130 BoogieDeclarations]: Found specification of procedure skb_network_header [2021-11-23 02:27:21,989 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_network_header [2021-11-23 02:27:21,989 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-23 02:27:21,989 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-23 02:27:21,989 INFO L130 BoogieDeclarations]: Found specification of procedure ql_free_net_req_rsp_queues [2021-11-23 02:27:21,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_free_net_req_rsp_queues [2021-11-23 02:27:21,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:27:21,990 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-23 02:27:21,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-23 02:27:21,990 INFO L130 BoogieDeclarations]: Found specification of procedure ql_mii_write_reg_ex [2021-11-23 02:27:21,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_mii_write_reg_ex [2021-11-23 02:27:21,990 INFO L130 BoogieDeclarations]: Found specification of procedure ql_adapter_down [2021-11-23 02:27:21,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_adapter_down [2021-11-23 02:27:21,990 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2021-11-23 02:27:21,990 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2021-11-23 02:27:21,991 INFO L130 BoogieDeclarations]: Found specification of procedure ql_port_start [2021-11-23 02:27:21,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_port_start [2021-11-23 02:27:21,991 INFO L130 BoogieDeclarations]: Found specification of procedure rtnl_lock [2021-11-23 02:27:21,991 INFO L138 BoogieDeclarations]: Found implementation of procedure rtnl_lock [2021-11-23 02:27:21,991 INFO L130 BoogieDeclarations]: Found specification of procedure ql_get_auto_cfg_status [2021-11-23 02:27:21,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_get_auto_cfg_status [2021-11-23 02:27:21,991 INFO L130 BoogieDeclarations]: Found specification of procedure ql_mii_write_reg [2021-11-23 02:27:21,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_mii_write_reg [2021-11-23 02:27:21,991 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-23 02:27:21,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-23 02:27:21,992 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~X~$Pointer$~TO~VOID [2021-11-23 02:27:21,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~X~$Pointer$~TO~VOID [2021-11-23 02:27:21,992 INFO L130 BoogieDeclarations]: Found specification of procedure init_timer_key [2021-11-23 02:27:21,992 INFO L138 BoogieDeclarations]: Found implementation of procedure init_timer_key [2021-11-23 02:27:21,992 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_msi [2021-11-23 02:27:21,992 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_msi [2021-11-23 02:27:21,992 INFO L130 BoogieDeclarations]: Found specification of procedure readl [2021-11-23 02:27:21,992 INFO L138 BoogieDeclarations]: Found implementation of procedure readl [2021-11-23 02:27:21,993 INFO L130 BoogieDeclarations]: Found specification of procedure delayed_work_timer_fn [2021-11-23 02:27:21,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:27:21,993 INFO L130 BoogieDeclarations]: Found specification of procedure ql_set_mac_addr [2021-11-23 02:27:21,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_set_mac_addr [2021-11-23 02:27:21,993 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-23 02:27:21,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-23 02:27:23,031 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:27:23,041 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:27:23,390 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-23 02:27:28,061 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-23 02:27:28,173 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:27:29,771 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:27:29,771 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 02:27:29,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:27:29 BoogieIcfgContainer [2021-11-23 02:27:29,778 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:27:29,782 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:27:29,782 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:27:29,787 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:27:29,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:27:15" (1/3) ... [2021-11-23 02:27:29,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dcacabc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:27:29, skipping insertion in model container [2021-11-23 02:27:29,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:20" (2/3) ... [2021-11-23 02:27:29,789 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dcacabc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:27:29, skipping insertion in model container [2021-11-23 02:27:29,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:27:29" (3/3) ... [2021-11-23 02:27:29,790 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-qlogic-qla3xxx.cil.i [2021-11-23 02:27:29,797 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:27:29,797 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-23 02:27:29,927 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:27:29,935 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:27:29,938 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-23 02:27:30,031 INFO L276 IsEmpty]: Start isEmpty. Operand has 1940 states, 1088 states have (on average 1.255514705882353) internal successors, (1366), 1139 states have internal predecessors, (1366), 714 states have call successors, (714), 136 states have call predecessors, (714), 135 states have return successors, (709), 694 states have call predecessors, (709), 709 states have call successors, (709) [2021-11-23 02:27:30,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-23 02:27:30,045 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:30,046 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:27:30,047 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:27:30,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:30,053 INFO L85 PathProgramCache]: Analyzing trace with hash -622942204, now seen corresponding path program 1 times [2021-11-23 02:27:30,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:30,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546673446] [2021-11-23 02:27:30,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:30,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:30,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:30,699 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2021-11-23 02:27:30,700 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:30,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546673446] [2021-11-23 02:27:30,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546673446] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:27:30,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:27:30,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:27:30,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909388113] [2021-11-23 02:27:30,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:27:30,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:27:30,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:30,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:27:30,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:27:30,749 INFO L87 Difference]: Start difference. First operand has 1940 states, 1088 states have (on average 1.255514705882353) internal successors, (1366), 1139 states have internal predecessors, (1366), 714 states have call successors, (714), 136 states have call predecessors, (714), 135 states have return successors, (709), 694 states have call predecessors, (709), 709 states have call successors, (709) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 02:27:33,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:33,829 INFO L93 Difference]: Finished difference Result 5726 states and 8386 transitions. [2021-11-23 02:27:33,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:27:33,832 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 97 [2021-11-23 02:27:33,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:33,890 INFO L225 Difference]: With dead ends: 5726 [2021-11-23 02:27:33,891 INFO L226 Difference]: Without dead ends: 3793 [2021-11-23 02:27:33,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:27:33,919 INFO L933 BasicCegarLoop]: 3148 mSDtfsCounter, 2700 mSDsluCounter, 2750 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2700 SdHoareTripleChecker+Valid, 5585 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:33,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2700 Valid, 5585 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-23 02:27:33,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3793 states. [2021-11-23 02:27:34,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3793 to 3789. [2021-11-23 02:27:34,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3789 states, 2135 states have (on average 1.2515222482435597) internal successors, (2672), 2235 states have internal predecessors, (2672), 1384 states have call successors, (1384), 268 states have call predecessors, (1384), 267 states have return successors, (1381), 1351 states have call predecessors, (1381), 1381 states have call successors, (1381) [2021-11-23 02:27:34,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3789 states to 3789 states and 5437 transitions. [2021-11-23 02:27:34,476 INFO L78 Accepts]: Start accepts. Automaton has 3789 states and 5437 transitions. Word has length 97 [2021-11-23 02:27:34,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:34,478 INFO L470 AbstractCegarLoop]: Abstraction has 3789 states and 5437 transitions. [2021-11-23 02:27:34,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 02:27:34,480 INFO L276 IsEmpty]: Start isEmpty. Operand 3789 states and 5437 transitions. [2021-11-23 02:27:34,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-23 02:27:34,494 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:34,495 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:27:34,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:27:34,495 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:27:34,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:34,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1671237939, now seen corresponding path program 1 times [2021-11-23 02:27:34,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:34,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523754642] [2021-11-23 02:27:34,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:34,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:34,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:34,862 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2021-11-23 02:27:34,862 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:34,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523754642] [2021-11-23 02:27:34,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523754642] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:27:34,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:27:34,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:27:34,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975028523] [2021-11-23 02:27:34,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:27:34,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:27:34,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:34,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:27:34,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:27:34,866 INFO L87 Difference]: Start difference. First operand 3789 states and 5437 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-23 02:27:42,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:42,666 INFO L93 Difference]: Finished difference Result 8368 states and 11879 transitions. [2021-11-23 02:27:42,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:27:42,666 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 102 [2021-11-23 02:27:42,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:42,707 INFO L225 Difference]: With dead ends: 8368 [2021-11-23 02:27:42,708 INFO L226 Difference]: Without dead ends: 4596 [2021-11-23 02:27:42,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:27:42,731 INFO L933 BasicCegarLoop]: 3424 mSDtfsCounter, 4659 mSDsluCounter, 6391 mSDsCounter, 0 mSdLazyCounter, 3132 mSolverCounterSat, 1297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4767 SdHoareTripleChecker+Valid, 8943 SdHoareTripleChecker+Invalid, 4429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1297 IncrementalHoareTripleChecker+Valid, 3132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:42,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4767 Valid, 8943 Invalid, 4429 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1297 Valid, 3132 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2021-11-23 02:27:42,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4596 states. [2021-11-23 02:27:42,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4596 to 4542. [2021-11-23 02:27:42,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4542 states, 2578 states have (on average 1.2428238944918542) internal successors, (3204), 2678 states have internal predecessors, (3204), 1581 states have call successors, (1581), 381 states have call predecessors, (1581), 380 states have return successors, (1578), 1554 states have call predecessors, (1578), 1578 states have call successors, (1578) [2021-11-23 02:27:43,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4542 states to 4542 states and 6363 transitions. [2021-11-23 02:27:43,026 INFO L78 Accepts]: Start accepts. Automaton has 4542 states and 6363 transitions. Word has length 102 [2021-11-23 02:27:43,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:43,027 INFO L470 AbstractCegarLoop]: Abstraction has 4542 states and 6363 transitions. [2021-11-23 02:27:43,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-23 02:27:43,027 INFO L276 IsEmpty]: Start isEmpty. Operand 4542 states and 6363 transitions. [2021-11-23 02:27:43,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-23 02:27:43,030 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:43,030 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:27:43,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:27:43,031 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:27:43,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:43,032 INFO L85 PathProgramCache]: Analyzing trace with hash 2008245933, now seen corresponding path program 1 times [2021-11-23 02:27:43,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:43,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082856265] [2021-11-23 02:27:43,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:43,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:43,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:43,234 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2021-11-23 02:27:43,234 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:43,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082856265] [2021-11-23 02:27:43,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082856265] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:27:43,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:27:43,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:27:43,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092855958] [2021-11-23 02:27:43,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:27:43,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:27:43,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:43,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:27:43,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:27:43,241 INFO L87 Difference]: Start difference. First operand 4542 states and 6363 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-23 02:27:46,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:46,671 INFO L93 Difference]: Finished difference Result 12310 states and 17263 transitions. [2021-11-23 02:27:46,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:27:46,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 105 [2021-11-23 02:27:46,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:46,755 INFO L225 Difference]: With dead ends: 12310 [2021-11-23 02:27:46,755 INFO L226 Difference]: Without dead ends: 7785 [2021-11-23 02:27:46,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:27:46,793 INFO L933 BasicCegarLoop]: 3364 mSDtfsCounter, 2672 mSDsluCounter, 2592 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2672 SdHoareTripleChecker+Valid, 5654 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:46,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2672 Valid, 5654 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-23 02:27:46,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7785 states. [2021-11-23 02:27:47,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7785 to 7756. [2021-11-23 02:27:47,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7756 states, 4408 states have (on average 1.243421052631579) internal successors, (5481), 4587 states have internal predecessors, (5481), 2689 states have call successors, (2689), 664 states have call predecessors, (2689), 656 states have return successors, (2705), 2625 states have call predecessors, (2705), 2686 states have call successors, (2705) [2021-11-23 02:27:47,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7756 states to 7756 states and 10875 transitions. [2021-11-23 02:27:47,403 INFO L78 Accepts]: Start accepts. Automaton has 7756 states and 10875 transitions. Word has length 105 [2021-11-23 02:27:47,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:47,406 INFO L470 AbstractCegarLoop]: Abstraction has 7756 states and 10875 transitions. [2021-11-23 02:27:47,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-23 02:27:47,407 INFO L276 IsEmpty]: Start isEmpty. Operand 7756 states and 10875 transitions. [2021-11-23 02:27:47,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-23 02:27:47,415 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:47,415 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:27:47,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:27:47,416 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:27:47,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:47,417 INFO L85 PathProgramCache]: Analyzing trace with hash -885809749, now seen corresponding path program 1 times [2021-11-23 02:27:47,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:47,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766840099] [2021-11-23 02:27:47,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:47,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:47,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:47,639 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2021-11-23 02:27:47,640 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:47,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766840099] [2021-11-23 02:27:47,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766840099] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:27:47,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:27:47,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:27:47,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305837272] [2021-11-23 02:27:47,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:27:47,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:27:47,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:47,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:27:47,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:27:47,643 INFO L87 Difference]: Start difference. First operand 7756 states and 10875 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-23 02:27:51,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:51,302 INFO L93 Difference]: Finished difference Result 20270 states and 28479 transitions. [2021-11-23 02:27:51,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:27:51,303 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 117 [2021-11-23 02:27:51,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:51,443 INFO L225 Difference]: With dead ends: 20270 [2021-11-23 02:27:51,443 INFO L226 Difference]: Without dead ends: 12531 [2021-11-23 02:27:51,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:27:51,486 INFO L933 BasicCegarLoop]: 3067 mSDtfsCounter, 2399 mSDsluCounter, 2695 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2399 SdHoareTripleChecker+Valid, 5468 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:51,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2399 Valid, 5468 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-23 02:27:51,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12531 states. [2021-11-23 02:27:52,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12531 to 12501. [2021-11-23 02:27:52,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12501 states, 7075 states have (on average 1.2364664310954063) internal successors, (8748), 7418 states have internal predecessors, (8748), 4385 states have call successors, (4385), 1055 states have call predecessors, (4385), 1038 states have return successors, (4422), 4253 states have call predecessors, (4422), 4382 states have call successors, (4422) [2021-11-23 02:27:52,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12501 states to 12501 states and 17555 transitions. [2021-11-23 02:27:52,286 INFO L78 Accepts]: Start accepts. Automaton has 12501 states and 17555 transitions. Word has length 117 [2021-11-23 02:27:52,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:52,287 INFO L470 AbstractCegarLoop]: Abstraction has 12501 states and 17555 transitions. [2021-11-23 02:27:52,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-23 02:27:52,287 INFO L276 IsEmpty]: Start isEmpty. Operand 12501 states and 17555 transitions. [2021-11-23 02:27:52,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-23 02:27:52,290 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:52,291 INFO L514 BasicCegarLoop]: trace histogram [12, 8, 8, 8, 8, 8, 8, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:27:52,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:27:52,291 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)] === [2021-11-23 02:27:52,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:52,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1089760311, now seen corresponding path program 1 times [2021-11-23 02:27:52,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:52,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775700165] [2021-11-23 02:27:52,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:52,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:52,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:52,547 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2021-11-23 02:27:52,547 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:52,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775700165] [2021-11-23 02:27:52,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775700165] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:27:52,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:27:52,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:27:52,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057950632] [2021-11-23 02:27:52,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:27:52,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:27:52,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:52,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:27:52,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:27:52,551 INFO L87 Difference]: Start difference. First operand 12501 states and 17555 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 02:27:56,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:56,455 INFO L93 Difference]: Finished difference Result 12507 states and 17560 transitions. [2021-11-23 02:27:56,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:27:56,456 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 135 [2021-11-23 02:27:56,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:56,536 INFO L225 Difference]: With dead ends: 12507 [2021-11-23 02:27:56,536 INFO L226 Difference]: Without dead ends: 12505 [2021-11-23 02:27:56,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:27:56,545 INFO L933 BasicCegarLoop]: 2444 mSDtfsCounter, 2725 mSDsluCounter, 5514 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2737 SdHoareTripleChecker+Valid, 7318 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:56,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2737 Valid, 7318 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-23 02:27:56,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12505 states. [2021-11-23 02:27:57,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12505 to 12505. [2021-11-23 02:27:57,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12505 states, 7078 states have (on average 1.2363662051426956) internal successors, (8751), 7421 states have internal predecessors, (8751), 4385 states have call successors, (4385), 1056 states have call predecessors, (4385), 1039 states have return successors, (4422), 4253 states have call predecessors, (4422), 4382 states have call successors, (4422) [2021-11-23 02:27:57,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12505 states to 12505 states and 17558 transitions. [2021-11-23 02:27:57,306 INFO L78 Accepts]: Start accepts. Automaton has 12505 states and 17558 transitions. Word has length 135 [2021-11-23 02:27:57,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:57,308 INFO L470 AbstractCegarLoop]: Abstraction has 12505 states and 17558 transitions. [2021-11-23 02:27:57,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 02:27:57,309 INFO L276 IsEmpty]: Start isEmpty. Operand 12505 states and 17558 transitions. [2021-11-23 02:27:57,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-23 02:27:57,315 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:57,315 INFO L514 BasicCegarLoop]: trace histogram [12, 8, 8, 8, 8, 8, 8, 4, 4, 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] [2021-11-23 02:27:57,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:27:57,316 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:27:57,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:57,317 INFO L85 PathProgramCache]: Analyzing trace with hash -92405721, now seen corresponding path program 1 times [2021-11-23 02:27:57,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:57,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626158364] [2021-11-23 02:27:57,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:57,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:57,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:57,572 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2021-11-23 02:27:57,572 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:57,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626158364] [2021-11-23 02:27:57,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626158364] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:27:57,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:27:57,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:27:57,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338926893] [2021-11-23 02:27:57,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:27:57,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:27:57,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:57,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:27:57,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:27:57,575 INFO L87 Difference]: Start difference. First operand 12505 states and 17558 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-23 02:28:01,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:28:01,476 INFO L93 Difference]: Finished difference Result 12947 states and 18023 transitions. [2021-11-23 02:28:01,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:28:01,479 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 140 [2021-11-23 02:28:01,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:28:01,567 INFO L225 Difference]: With dead ends: 12947 [2021-11-23 02:28:01,567 INFO L226 Difference]: Without dead ends: 12945 [2021-11-23 02:28:01,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:28:01,579 INFO L933 BasicCegarLoop]: 2480 mSDtfsCounter, 2689 mSDsluCounter, 5705 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2700 SdHoareTripleChecker+Valid, 7527 SdHoareTripleChecker+Invalid, 1002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:28:01,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2700 Valid, 7527 Invalid, 1002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1000 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-23 02:28:01,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12945 states. [2021-11-23 02:28:02,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12945 to 12941. [2021-11-23 02:28:02,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12941 states, 7293 states have (on average 1.2326888797477034) internal successors, (8990), 7648 states have internal predecessors, (8990), 4496 states have call successors, (4496), 1166 states have call predecessors, (4496), 1149 states have return successors, (4533), 4364 states have call predecessors, (4533), 4493 states have call successors, (4533) [2021-11-23 02:28:02,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12941 states to 12941 states and 18019 transitions. [2021-11-23 02:28:02,411 INFO L78 Accepts]: Start accepts. Automaton has 12941 states and 18019 transitions. Word has length 140 [2021-11-23 02:28:02,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:28:02,412 INFO L470 AbstractCegarLoop]: Abstraction has 12941 states and 18019 transitions. [2021-11-23 02:28:02,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-23 02:28:02,413 INFO L276 IsEmpty]: Start isEmpty. Operand 12941 states and 18019 transitions. [2021-11-23 02:28:02,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-23 02:28:02,417 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:28:02,417 INFO L514 BasicCegarLoop]: trace histogram [12, 8, 8, 8, 8, 8, 8, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:28:02,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 02:28:02,418 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:28:02,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:28:02,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1084258807, now seen corresponding path program 1 times [2021-11-23 02:28:02,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:28:02,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344923579] [2021-11-23 02:28:02,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:02,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:28:02,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:02,802 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2021-11-23 02:28:02,803 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:28:02,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344923579] [2021-11-23 02:28:02,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344923579] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:28:02,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:28:02,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:28:02,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854630164] [2021-11-23 02:28:02,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:28:02,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:28:02,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:28:02,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:28:02,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:28:02,807 INFO L87 Difference]: Start difference. First operand 12941 states and 18019 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-23 02:28:06,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:28:06,714 INFO L93 Difference]: Finished difference Result 12947 states and 18024 transitions. [2021-11-23 02:28:06,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:28:06,719 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 145 [2021-11-23 02:28:06,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:28:06,808 INFO L225 Difference]: With dead ends: 12947 [2021-11-23 02:28:06,808 INFO L226 Difference]: Without dead ends: 12945 [2021-11-23 02:28:06,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:28:06,820 INFO L933 BasicCegarLoop]: 2447 mSDtfsCounter, 2720 mSDsluCounter, 5514 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2730 SdHoareTripleChecker+Valid, 7321 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:28:06,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2730 Valid, 7321 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-23 02:28:06,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12945 states. [2021-11-23 02:28:07,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12945 to 12945. [2021-11-23 02:28:07,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12945 states, 7296 states have (on average 1.232593201754386) internal successors, (8993), 7651 states have internal predecessors, (8993), 4496 states have call successors, (4496), 1167 states have call predecessors, (4496), 1150 states have return successors, (4533), 4364 states have call predecessors, (4533), 4493 states have call successors, (4533) [2021-11-23 02:28:07,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12945 states to 12945 states and 18022 transitions. [2021-11-23 02:28:07,664 INFO L78 Accepts]: Start accepts. Automaton has 12945 states and 18022 transitions. Word has length 145 [2021-11-23 02:28:07,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:28:07,665 INFO L470 AbstractCegarLoop]: Abstraction has 12945 states and 18022 transitions. [2021-11-23 02:28:07,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-23 02:28:07,666 INFO L276 IsEmpty]: Start isEmpty. Operand 12945 states and 18022 transitions. [2021-11-23 02:28:07,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-23 02:28:07,677 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:28:07,678 INFO L514 BasicCegarLoop]: trace histogram [12, 8, 8, 8, 8, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:28:07,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 02:28:07,678 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:28:07,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:28:07,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1563343335, now seen corresponding path program 1 times [2021-11-23 02:28:07,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:28:07,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574276127] [2021-11-23 02:28:07,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:07,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:28:07,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:08,027 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2021-11-23 02:28:08,027 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:28:08,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574276127] [2021-11-23 02:28:08,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574276127] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:28:08,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:28:08,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:28:08,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154452575] [2021-11-23 02:28:08,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:28:08,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:28:08,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:28:08,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:28:08,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:28:08,030 INFO L87 Difference]: Start difference. First operand 12945 states and 18022 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-23 02:28:12,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:28:12,260 INFO L93 Difference]: Finished difference Result 12951 states and 18027 transitions. [2021-11-23 02:28:12,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:28:12,261 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 150 [2021-11-23 02:28:12,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:28:12,342 INFO L225 Difference]: With dead ends: 12951 [2021-11-23 02:28:12,342 INFO L226 Difference]: Without dead ends: 12949 [2021-11-23 02:28:12,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:28:12,354 INFO L933 BasicCegarLoop]: 2447 mSDtfsCounter, 2720 mSDsluCounter, 5514 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2729 SdHoareTripleChecker+Valid, 7321 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:28:12,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2729 Valid, 7321 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-11-23 02:28:12,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12949 states. [2021-11-23 02:28:13,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12949 to 12949. [2021-11-23 02:28:13,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12949 states, 7299 states have (on average 1.2324976024112893) internal successors, (8996), 7654 states have internal predecessors, (8996), 4496 states have call successors, (4496), 1168 states have call predecessors, (4496), 1151 states have return successors, (4533), 4364 states have call predecessors, (4533), 4493 states have call successors, (4533) [2021-11-23 02:28:13,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12949 states to 12949 states and 18025 transitions. [2021-11-23 02:28:13,393 INFO L78 Accepts]: Start accepts. Automaton has 12949 states and 18025 transitions. Word has length 150 [2021-11-23 02:28:13,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:28:13,394 INFO L470 AbstractCegarLoop]: Abstraction has 12949 states and 18025 transitions. [2021-11-23 02:28:13,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-23 02:28:13,394 INFO L276 IsEmpty]: Start isEmpty. Operand 12949 states and 18025 transitions. [2021-11-23 02:28:13,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-23 02:28:13,398 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:28:13,398 INFO L514 BasicCegarLoop]: trace histogram [12, 8, 8, 8, 8, 8, 8, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:28:13,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 02:28:13,399 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)] === [2021-11-23 02:28:13,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:28:13,400 INFO L85 PathProgramCache]: Analyzing trace with hash 72878007, now seen corresponding path program 1 times [2021-11-23 02:28:13,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:28:13,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119672113] [2021-11-23 02:28:13,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:13,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:28:13,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:13,645 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2021-11-23 02:28:13,646 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:28:13,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119672113] [2021-11-23 02:28:13,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119672113] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:28:13,646 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:28:13,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:28:13,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048513242] [2021-11-23 02:28:13,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:28:13,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:28:13,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:28:13,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:28:13,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:28:13,649 INFO L87 Difference]: Start difference. First operand 12949 states and 18025 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-23 02:28:18,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:28:18,791 INFO L93 Difference]: Finished difference Result 13256 states and 18277 transitions. [2021-11-23 02:28:18,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:28:18,792 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 155 [2021-11-23 02:28:18,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:28:18,878 INFO L225 Difference]: With dead ends: 13256 [2021-11-23 02:28:18,878 INFO L226 Difference]: Without dead ends: 13254 [2021-11-23 02:28:18,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:28:18,891 INFO L933 BasicCegarLoop]: 2468 mSDtfsCounter, 1612 mSDsluCounter, 6703 mSDsCounter, 0 mSdLazyCounter, 1080 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1620 SdHoareTripleChecker+Valid, 8436 SdHoareTripleChecker+Invalid, 1082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:28:18,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1620 Valid, 8436 Invalid, 1082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1080 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-11-23 02:28:18,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13254 states. [2021-11-23 02:28:19,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13254 to 13252. [2021-11-23 02:28:19,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13252 states, 7462 states have (on average 1.2292950951487538) internal successors, (9173), 7825 states have internal predecessors, (9173), 4532 states have call successors, (4532), 1272 states have call predecessors, (4532), 1255 states have return successors, (4569), 4400 states have call predecessors, (4569), 4529 states have call successors, (4569) [2021-11-23 02:28:20,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13252 states to 13252 states and 18274 transitions. [2021-11-23 02:28:20,075 INFO L78 Accepts]: Start accepts. Automaton has 13252 states and 18274 transitions. Word has length 155 [2021-11-23 02:28:20,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:28:20,076 INFO L470 AbstractCegarLoop]: Abstraction has 13252 states and 18274 transitions. [2021-11-23 02:28:20,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-23 02:28:20,076 INFO L276 IsEmpty]: Start isEmpty. Operand 13252 states and 18274 transitions. [2021-11-23 02:28:20,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-23 02:28:20,081 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:28:20,081 INFO L514 BasicCegarLoop]: trace histogram [12, 8, 8, 8, 8, 8, 8, 6, 6, 6, 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] [2021-11-23 02:28:20,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 02:28:20,082 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:28:20,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:28:20,082 INFO L85 PathProgramCache]: Analyzing trace with hash 721042947, now seen corresponding path program 1 times [2021-11-23 02:28:20,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:28:20,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105958403] [2021-11-23 02:28:20,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:20,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:28:20,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:20,334 INFO L134 CoverageAnalysis]: Checked inductivity of 399 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 389 trivial. 0 not checked. [2021-11-23 02:28:20,334 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:28:20,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105958403] [2021-11-23 02:28:20,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105958403] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:28:20,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:28:20,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:28:20,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616184440] [2021-11-23 02:28:20,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:28:20,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:28:20,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:28:20,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:28:20,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:28:20,337 INFO L87 Difference]: Start difference. First operand 13252 states and 18274 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-23 02:28:23,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:28:23,943 INFO L93 Difference]: Finished difference Result 13258 states and 18279 transitions. [2021-11-23 02:28:23,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:28:23,948 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 169 [2021-11-23 02:28:23,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:28:24,022 INFO L225 Difference]: With dead ends: 13258 [2021-11-23 02:28:24,023 INFO L226 Difference]: Without dead ends: 13256 [2021-11-23 02:28:24,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:28:24,032 INFO L933 BasicCegarLoop]: 2447 mSDtfsCounter, 2716 mSDsluCounter, 5514 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2723 SdHoareTripleChecker+Valid, 7321 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:28:24,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2723 Valid, 7321 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-23 02:28:24,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13256 states. [2021-11-23 02:28:24,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13256 to 13256. [2021-11-23 02:28:24,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13256 states, 7465 states have (on average 1.2292029470864032) internal successors, (9176), 7828 states have internal predecessors, (9176), 4532 states have call successors, (4532), 1273 states have call predecessors, (4532), 1256 states have return successors, (4569), 4400 states have call predecessors, (4569), 4529 states have call successors, (4569) [2021-11-23 02:28:24,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13256 states to 13256 states and 18277 transitions. [2021-11-23 02:28:24,965 INFO L78 Accepts]: Start accepts. Automaton has 13256 states and 18277 transitions. Word has length 169 [2021-11-23 02:28:24,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:28:24,966 INFO L470 AbstractCegarLoop]: Abstraction has 13256 states and 18277 transitions. [2021-11-23 02:28:24,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-23 02:28:24,967 INFO L276 IsEmpty]: Start isEmpty. Operand 13256 states and 18277 transitions. [2021-11-23 02:28:24,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-23 02:28:24,970 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:28:24,971 INFO L514 BasicCegarLoop]: trace histogram [12, 8, 8, 8, 8, 8, 8, 7, 6, 6, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:28:24,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 02:28:24,971 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:28:24,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:28:24,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1816455817, now seen corresponding path program 1 times [2021-11-23 02:28:24,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:28:24,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758594223] [2021-11-23 02:28:24,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:24,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:28:25,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:25,185 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 383 trivial. 0 not checked. [2021-11-23 02:28:25,185 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:28:25,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758594223] [2021-11-23 02:28:25,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758594223] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:28:25,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:28:25,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:28:25,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422938325] [2021-11-23 02:28:25,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:28:25,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:28:25,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:28:25,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:28:25,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:28:25,188 INFO L87 Difference]: Start difference. First operand 13256 states and 18277 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-23 02:28:28,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:28:28,728 INFO L93 Difference]: Finished difference Result 13262 states and 18282 transitions. [2021-11-23 02:28:28,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:28:28,729 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 165 [2021-11-23 02:28:28,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:28:28,792 INFO L225 Difference]: With dead ends: 13262 [2021-11-23 02:28:28,792 INFO L226 Difference]: Without dead ends: 13260 [2021-11-23 02:28:28,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:28:28,803 INFO L933 BasicCegarLoop]: 2447 mSDtfsCounter, 2720 mSDsluCounter, 5514 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2726 SdHoareTripleChecker+Valid, 7321 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:28:28,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2726 Valid, 7321 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-23 02:28:28,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13260 states. [2021-11-23 02:28:29,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13260 to 13260. [2021-11-23 02:28:29,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13260 states, 7468 states have (on average 1.2291108730583824) internal successors, (9179), 7831 states have internal predecessors, (9179), 4532 states have call successors, (4532), 1274 states have call predecessors, (4532), 1257 states have return successors, (4569), 4400 states have call predecessors, (4569), 4529 states have call successors, (4569) [2021-11-23 02:28:29,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13260 states to 13260 states and 18280 transitions. [2021-11-23 02:28:29,830 INFO L78 Accepts]: Start accepts. Automaton has 13260 states and 18280 transitions. Word has length 165 [2021-11-23 02:28:29,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:28:29,831 INFO L470 AbstractCegarLoop]: Abstraction has 13260 states and 18280 transitions. [2021-11-23 02:28:29,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-23 02:28:29,831 INFO L276 IsEmpty]: Start isEmpty. Operand 13260 states and 18280 transitions. [2021-11-23 02:28:29,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-23 02:28:29,837 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:28:29,837 INFO L514 BasicCegarLoop]: trace histogram [12, 8, 8, 8, 8, 8, 8, 8, 7, 7, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:28:29,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 02:28:29,838 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:28:29,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:28:29,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1146989927, now seen corresponding path program 1 times [2021-11-23 02:28:29,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:28:29,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272122755] [2021-11-23 02:28:29,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:29,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:28:29,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:30,064 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 407 trivial. 0 not checked. [2021-11-23 02:28:30,065 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:28:30,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272122755] [2021-11-23 02:28:30,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272122755] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:28:30,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:28:30,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:28:30,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727124829] [2021-11-23 02:28:30,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:28:30,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:28:30,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:28:30,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:28:30,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:28:30,069 INFO L87 Difference]: Start difference. First operand 13260 states and 18280 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-23 02:28:33,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:28:33,206 INFO L93 Difference]: Finished difference Result 13266 states and 18285 transitions. [2021-11-23 02:28:33,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:28:33,207 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 170 [2021-11-23 02:28:33,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:28:33,256 INFO L225 Difference]: With dead ends: 13266 [2021-11-23 02:28:33,256 INFO L226 Difference]: Without dead ends: 13264 [2021-11-23 02:28:33,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:28:33,263 INFO L933 BasicCegarLoop]: 2447 mSDtfsCounter, 2720 mSDsluCounter, 5514 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2725 SdHoareTripleChecker+Valid, 7321 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:28:33,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2725 Valid, 7321 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-23 02:28:33,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13264 states. [2021-11-23 02:28:33,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13264 to 13264. [2021-11-23 02:28:33,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13264 states, 7471 states have (on average 1.2290188729755054) internal successors, (9182), 7834 states have internal predecessors, (9182), 4532 states have call successors, (4532), 1275 states have call predecessors, (4532), 1258 states have return successors, (4569), 4400 states have call predecessors, (4569), 4529 states have call successors, (4569) [2021-11-23 02:28:34,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13264 states to 13264 states and 18283 transitions. [2021-11-23 02:28:34,048 INFO L78 Accepts]: Start accepts. Automaton has 13264 states and 18283 transitions. Word has length 170 [2021-11-23 02:28:34,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:28:34,048 INFO L470 AbstractCegarLoop]: Abstraction has 13264 states and 18283 transitions. [2021-11-23 02:28:34,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-23 02:28:34,049 INFO L276 IsEmpty]: Start isEmpty. Operand 13264 states and 18283 transitions. [2021-11-23 02:28:34,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-23 02:28:34,054 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:28:34,054 INFO L514 BasicCegarLoop]: trace histogram [14, 8, 8, 8, 8, 8, 8, 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] [2021-11-23 02:28:34,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 02:28:34,055 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:28:34,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:28:34,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1663998121, now seen corresponding path program 1 times [2021-11-23 02:28:34,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:28:34,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278423958] [2021-11-23 02:28:34,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:34,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:28:34,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:34,332 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2021-11-23 02:28:34,332 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:28:34,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278423958] [2021-11-23 02:28:34,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278423958] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:28:34,333 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:28:34,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:28:34,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117284689] [2021-11-23 02:28:34,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:28:34,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:28:34,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:28:34,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:28:34,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:28:34,335 INFO L87 Difference]: Start difference. First operand 13264 states and 18283 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-23 02:28:37,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:28:37,763 INFO L93 Difference]: Finished difference Result 28248 states and 38812 transitions. [2021-11-23 02:28:37,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:28:37,768 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 168 [2021-11-23 02:28:37,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:28:37,854 INFO L225 Difference]: With dead ends: 28248 [2021-11-23 02:28:37,855 INFO L226 Difference]: Without dead ends: 15054 [2021-11-23 02:28:37,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:28:37,927 INFO L933 BasicCegarLoop]: 3158 mSDtfsCounter, 893 mSDsluCounter, 2711 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 893 SdHoareTripleChecker+Valid, 5564 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:28:37,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [893 Valid, 5564 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-23 02:28:37,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15054 states. [2021-11-23 02:28:38,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15054 to 14993. [2021-11-23 02:28:38,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14993 states, 8473 states have (on average 1.2264841260474448) internal successors, (10392), 8866 states have internal predecessors, (10392), 5034 states have call successors, (5034), 1500 states have call predecessors, (5034), 1483 states have return successors, (5071), 4890 states have call predecessors, (5071), 5031 states have call successors, (5071) [2021-11-23 02:28:38,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14993 states to 14993 states and 20497 transitions. [2021-11-23 02:28:38,930 INFO L78 Accepts]: Start accepts. Automaton has 14993 states and 20497 transitions. Word has length 168 [2021-11-23 02:28:38,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:28:38,931 INFO L470 AbstractCegarLoop]: Abstraction has 14993 states and 20497 transitions. [2021-11-23 02:28:38,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-23 02:28:38,932 INFO L276 IsEmpty]: Start isEmpty. Operand 14993 states and 20497 transitions. [2021-11-23 02:28:38,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-23 02:28:38,934 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:28:38,935 INFO L514 BasicCegarLoop]: trace histogram [12, 9, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:28:38,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 02:28:38,935 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:28:38,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:28:38,936 INFO L85 PathProgramCache]: Analyzing trace with hash 172086619, now seen corresponding path program 1 times [2021-11-23 02:28:38,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:28:38,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253324863] [2021-11-23 02:28:38,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:38,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:28:39,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:39,160 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 461 trivial. 0 not checked. [2021-11-23 02:28:39,160 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:28:39,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253324863] [2021-11-23 02:28:39,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253324863] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:28:39,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:28:39,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:28:39,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906901545] [2021-11-23 02:28:39,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:28:39,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:28:39,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:28:39,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:28:39,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:28:39,163 INFO L87 Difference]: Start difference. First operand 14993 states and 20497 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-23 02:28:42,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:28:42,659 INFO L93 Difference]: Finished difference Result 14999 states and 20502 transitions. [2021-11-23 02:28:42,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:28:42,660 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 184 [2021-11-23 02:28:42,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:28:42,724 INFO L225 Difference]: With dead ends: 14999 [2021-11-23 02:28:42,724 INFO L226 Difference]: Without dead ends: 14997 [2021-11-23 02:28:42,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:28:42,734 INFO L933 BasicCegarLoop]: 2447 mSDtfsCounter, 2716 mSDsluCounter, 5514 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2720 SdHoareTripleChecker+Valid, 7321 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:28:42,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2720 Valid, 7321 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-23 02:28:42,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14997 states. [2021-11-23 02:28:43,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14997 to 14997. [2021-11-23 02:28:43,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14997 states, 8476 states have (on average 1.2264039641340254) internal successors, (10395), 8869 states have internal predecessors, (10395), 5034 states have call successors, (5034), 1501 states have call predecessors, (5034), 1484 states have return successors, (5071), 4890 states have call predecessors, (5071), 5031 states have call successors, (5071) [2021-11-23 02:28:43,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14997 states to 14997 states and 20500 transitions. [2021-11-23 02:28:43,577 INFO L78 Accepts]: Start accepts. Automaton has 14997 states and 20500 transitions. Word has length 184 [2021-11-23 02:28:43,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:28:43,578 INFO L470 AbstractCegarLoop]: Abstraction has 14997 states and 20500 transitions. [2021-11-23 02:28:43,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-23 02:28:43,579 INFO L276 IsEmpty]: Start isEmpty. Operand 14997 states and 20500 transitions. [2021-11-23 02:28:43,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-23 02:28:43,581 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:28:43,581 INFO L514 BasicCegarLoop]: trace histogram [12, 10, 9, 9, 8, 8, 8, 8, 8, 8, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:28:43,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 02:28:43,582 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)] === [2021-11-23 02:28:43,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:28:43,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1234954023, now seen corresponding path program 1 times [2021-11-23 02:28:43,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:28:43,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439894690] [2021-11-23 02:28:43,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:43,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:28:43,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:43,771 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 467 trivial. 0 not checked. [2021-11-23 02:28:43,771 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:28:43,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439894690] [2021-11-23 02:28:43,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439894690] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:28:43,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:28:43,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:28:43,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015002173] [2021-11-23 02:28:43,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:28:43,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:28:43,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:28:43,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:28:43,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:28:43,774 INFO L87 Difference]: Start difference. First operand 14997 states and 20500 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-23 02:28:47,459 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:28:49,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:28:49,011 INFO L93 Difference]: Finished difference Result 15003 states and 20505 transitions. [2021-11-23 02:28:49,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:28:49,012 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 180 [2021-11-23 02:28:49,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:28:49,066 INFO L225 Difference]: With dead ends: 15003 [2021-11-23 02:28:49,067 INFO L226 Difference]: Without dead ends: 15001 [2021-11-23 02:28:49,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:28:49,076 INFO L933 BasicCegarLoop]: 2447 mSDtfsCounter, 2720 mSDsluCounter, 5514 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2723 SdHoareTripleChecker+Valid, 7321 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:28:49,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2723 Valid, 7321 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-11-23 02:28:49,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15001 states. [2021-11-23 02:28:49,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15001 to 15001. [2021-11-23 02:28:49,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15001 states, 8479 states have (on average 1.2263238589456305) internal successors, (10398), 8872 states have internal predecessors, (10398), 5034 states have call successors, (5034), 1502 states have call predecessors, (5034), 1485 states have return successors, (5071), 4890 states have call predecessors, (5071), 5031 states have call successors, (5071) [2021-11-23 02:28:49,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15001 states to 15001 states and 20503 transitions. [2021-11-23 02:28:49,812 INFO L78 Accepts]: Start accepts. Automaton has 15001 states and 20503 transitions. Word has length 180 [2021-11-23 02:28:49,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:28:49,813 INFO L470 AbstractCegarLoop]: Abstraction has 15001 states and 20503 transitions. [2021-11-23 02:28:49,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-23 02:28:49,813 INFO L276 IsEmpty]: Start isEmpty. Operand 15001 states and 20503 transitions. [2021-11-23 02:28:49,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-23 02:28:49,816 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:28:49,816 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 10, 10, 8, 8, 8, 8, 8, 8, 6, 6, 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] [2021-11-23 02:28:49,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 02:28:49,817 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:28:49,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:28:49,817 INFO L85 PathProgramCache]: Analyzing trace with hash -722565605, now seen corresponding path program 1 times [2021-11-23 02:28:49,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:28:49,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119249727] [2021-11-23 02:28:49,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:49,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:28:49,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:50,058 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-11-23 02:28:50,058 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:28:50,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119249727] [2021-11-23 02:28:50,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119249727] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:28:50,061 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:28:50,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:28:50,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123133097] [2021-11-23 02:28:50,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:28:50,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:28:50,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:28:50,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:28:50,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:28:50,063 INFO L87 Difference]: Start difference. First operand 15001 states and 20503 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-23 02:28:54,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:28:54,074 INFO L93 Difference]: Finished difference Result 15007 states and 20508 transitions. [2021-11-23 02:28:54,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:28:54,074 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 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 194 [2021-11-23 02:28:54,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:28:54,132 INFO L225 Difference]: With dead ends: 15007 [2021-11-23 02:28:54,132 INFO L226 Difference]: Without dead ends: 15005 [2021-11-23 02:28:54,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:28:54,140 INFO L933 BasicCegarLoop]: 2447 mSDtfsCounter, 2716 mSDsluCounter, 5514 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2718 SdHoareTripleChecker+Valid, 7321 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:28:54,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2718 Valid, 7321 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-23 02:28:54,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15005 states. [2021-11-23 02:28:54,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15005 to 15005. [2021-11-23 02:28:54,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15005 states, 8482 states have (on average 1.2262438104220703) internal successors, (10401), 8875 states have internal predecessors, (10401), 5034 states have call successors, (5034), 1503 states have call predecessors, (5034), 1486 states have return successors, (5071), 4890 states have call predecessors, (5071), 5031 states have call successors, (5071) [2021-11-23 02:28:54,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15005 states to 15005 states and 20506 transitions. [2021-11-23 02:28:54,960 INFO L78 Accepts]: Start accepts. Automaton has 15005 states and 20506 transitions. Word has length 194 [2021-11-23 02:28:54,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:28:54,960 INFO L470 AbstractCegarLoop]: Abstraction has 15005 states and 20506 transitions. [2021-11-23 02:28:54,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-23 02:28:54,961 INFO L276 IsEmpty]: Start isEmpty. Operand 15005 states and 20506 transitions. [2021-11-23 02:28:54,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-11-23 02:28:54,964 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:28:54,964 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 8, 8, 8, 8, 8, 8, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:28:54,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 02:28:54,965 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:28:54,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:28:54,966 INFO L85 PathProgramCache]: Analyzing trace with hash 35611203, now seen corresponding path program 1 times [2021-11-23 02:28:54,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:28:54,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456192463] [2021-11-23 02:28:54,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:54,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:28:55,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:55,163 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 569 trivial. 0 not checked. [2021-11-23 02:28:55,163 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:28:55,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456192463] [2021-11-23 02:28:55,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456192463] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:28:55,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:28:55,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:28:55,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701500000] [2021-11-23 02:28:55,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:28:55,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:28:55,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:28:55,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:28:55,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:28:55,167 INFO L87 Difference]: Start difference. First operand 15005 states and 20506 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-23 02:28:59,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:28:59,085 INFO L93 Difference]: Finished difference Result 15011 states and 20511 transitions. [2021-11-23 02:28:59,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:28:59,086 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 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 199 [2021-11-23 02:28:59,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:28:59,143 INFO L225 Difference]: With dead ends: 15011 [2021-11-23 02:28:59,144 INFO L226 Difference]: Without dead ends: 15007 [2021-11-23 02:28:59,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:28:59,153 INFO L933 BasicCegarLoop]: 2447 mSDtfsCounter, 2716 mSDsluCounter, 5514 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2717 SdHoareTripleChecker+Valid, 7321 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:28:59,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2717 Valid, 7321 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-23 02:28:59,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15007 states. [2021-11-23 02:28:59,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15007 to 15007. [2021-11-23 02:28:59,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15007 states, 8484 states have (on average 1.226072607260726) internal successors, (10402), 8876 states have internal predecessors, (10402), 5034 states have call successors, (5034), 1504 states have call predecessors, (5034), 1486 states have return successors, (5071), 4890 states have call predecessors, (5071), 5031 states have call successors, (5071) [2021-11-23 02:28:59,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15007 states to 15007 states and 20507 transitions. [2021-11-23 02:28:59,970 INFO L78 Accepts]: Start accepts. Automaton has 15007 states and 20507 transitions. Word has length 199 [2021-11-23 02:28:59,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:28:59,971 INFO L470 AbstractCegarLoop]: Abstraction has 15007 states and 20507 transitions. [2021-11-23 02:28:59,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-23 02:28:59,971 INFO L276 IsEmpty]: Start isEmpty. Operand 15007 states and 20507 transitions. [2021-11-23 02:28:59,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-23 02:28:59,973 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:28:59,973 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 8, 8, 8, 8, 8, 8, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:28:59,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-23 02:28:59,974 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)] === [2021-11-23 02:28:59,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:28:59,974 INFO L85 PathProgramCache]: Analyzing trace with hash -601276745, now seen corresponding path program 1 times [2021-11-23 02:28:59,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:28:59,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984657165] [2021-11-23 02:28:59,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:59,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:29:00,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:00,162 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 587 trivial. 0 not checked. [2021-11-23 02:29:00,162 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:29:00,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984657165] [2021-11-23 02:29:00,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984657165] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:29:00,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:29:00,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:29:00,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068830378] [2021-11-23 02:29:00,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:29:00,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:29:00,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:29:00,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:29:00,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:29:00,165 INFO L87 Difference]: Start difference. First operand 15007 states and 20507 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-23 02:29:04,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:29:04,753 INFO L93 Difference]: Finished difference Result 15007 states and 20507 transitions. [2021-11-23 02:29:04,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:29:04,754 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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 195 [2021-11-23 02:29:04,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:29:04,812 INFO L225 Difference]: With dead ends: 15007 [2021-11-23 02:29:04,812 INFO L226 Difference]: Without dead ends: 14856 [2021-11-23 02:29:04,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:29:04,821 INFO L933 BasicCegarLoop]: 2445 mSDtfsCounter, 2716 mSDsluCounter, 5513 mSDsCounter, 0 mSdLazyCounter, 975 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2716 SdHoareTripleChecker+Valid, 7318 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:29:04,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2716 Valid, 7318 Invalid, 976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 975 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-11-23 02:29:04,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14856 states. [2021-11-23 02:29:05,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14856 to 14856. [2021-11-23 02:29:05,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14856 states, 8426 states have (on average 1.2238309992879184) internal successors, (10312), 8786 states have internal predecessors, (10312), 4955 states have call successors, (4955), 1489 states have call predecessors, (4955), 1473 states have return successors, (4995), 4844 states have call predecessors, (4995), 4955 states have call successors, (4995) [2021-11-23 02:29:05,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14856 states to 14856 states and 20262 transitions. [2021-11-23 02:29:05,887 INFO L78 Accepts]: Start accepts. Automaton has 14856 states and 20262 transitions. Word has length 195 [2021-11-23 02:29:05,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:29:05,888 INFO L470 AbstractCegarLoop]: Abstraction has 14856 states and 20262 transitions. [2021-11-23 02:29:05,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-23 02:29:05,888 INFO L276 IsEmpty]: Start isEmpty. Operand 14856 states and 20262 transitions. [2021-11-23 02:29:05,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-11-23 02:29:05,892 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:29:05,892 INFO L514 BasicCegarLoop]: trace histogram [16, 8, 8, 8, 8, 8, 8, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:29:05,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-23 02:29:05,893 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)] === [2021-11-23 02:29:05,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:29:05,894 INFO L85 PathProgramCache]: Analyzing trace with hash 513956273, now seen corresponding path program 1 times [2021-11-23 02:29:05,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:29:05,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095418761] [2021-11-23 02:29:05,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:05,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:29:05,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:06,169 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2021-11-23 02:29:06,170 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:29:06,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095418761] [2021-11-23 02:29:06,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095418761] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:29:06,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:29:06,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:29:06,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956058627] [2021-11-23 02:29:06,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:29:06,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:29:06,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:29:06,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:29:06,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:29:06,174 INFO L87 Difference]: Start difference. First operand 14856 states and 20262 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-23 02:29:09,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:29:09,771 INFO L93 Difference]: Finished difference Result 14892 states and 20296 transitions. [2021-11-23 02:29:09,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:29:09,772 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 230 [2021-11-23 02:29:09,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:29:09,821 INFO L225 Difference]: With dead ends: 14892 [2021-11-23 02:29:09,821 INFO L226 Difference]: Without dead ends: 14890 [2021-11-23 02:29:09,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:29:09,828 INFO L933 BasicCegarLoop]: 2423 mSDtfsCounter, 1548 mSDsluCounter, 6626 mSDsCounter, 0 mSdLazyCounter, 1063 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1550 SdHoareTripleChecker+Valid, 8318 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:29:09,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1550 Valid, 8318 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1063 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-23 02:29:09,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14890 states. [2021-11-23 02:29:10,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14890 to 14888. [2021-11-23 02:29:10,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14888 states, 8450 states have (on average 1.2215384615384615) internal successors, (10322), 8810 states have internal predecessors, (10322), 4955 states have call successors, (4955), 1497 states have call predecessors, (4955), 1481 states have return successors, (4995), 4844 states have call predecessors, (4995), 4955 states have call successors, (4995) [2021-11-23 02:29:10,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14888 states to 14888 states and 20272 transitions. [2021-11-23 02:29:10,643 INFO L78 Accepts]: Start accepts. Automaton has 14888 states and 20272 transitions. Word has length 230 [2021-11-23 02:29:10,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:29:10,644 INFO L470 AbstractCegarLoop]: Abstraction has 14888 states and 20272 transitions. [2021-11-23 02:29:10,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-23 02:29:10,644 INFO L276 IsEmpty]: Start isEmpty. Operand 14888 states and 20272 transitions. [2021-11-23 02:29:10,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2021-11-23 02:29:10,652 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:29:10,653 INFO L514 BasicCegarLoop]: trace histogram [15, 10, 10, 8, 8, 8, 8, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:29:10,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-23 02:29:10,653 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:29:10,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:29:10,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1281579739, now seen corresponding path program 1 times [2021-11-23 02:29:10,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:29:10,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743365540] [2021-11-23 02:29:10,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:10,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:29:10,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:10,842 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2021-11-23 02:29:10,842 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:29:10,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743365540] [2021-11-23 02:29:10,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743365540] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:29:10,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:29:10,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:29:10,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390040300] [2021-11-23 02:29:10,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:29:10,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:29:10,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:29:10,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:29:10,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:29:10,845 INFO L87 Difference]: Start difference. First operand 14888 states and 20272 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-23 02:29:14,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:29:14,645 INFO L93 Difference]: Finished difference Result 29730 states and 40564 transitions. [2021-11-23 02:29:14,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:29:14,646 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 260 [2021-11-23 02:29:14,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:29:14,720 INFO L225 Difference]: With dead ends: 29730 [2021-11-23 02:29:14,720 INFO L226 Difference]: Without dead ends: 14912 [2021-11-23 02:29:14,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:29:14,762 INFO L933 BasicCegarLoop]: 2403 mSDtfsCounter, 5 mSDsluCounter, 5436 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 7203 SdHoareTripleChecker+Invalid, 965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:29:14,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 7203 Invalid, 965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 963 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-23 02:29:14,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14912 states. [2021-11-23 02:29:15,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14912 to 14908. [2021-11-23 02:29:15,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14908 states, 8466 states have (on average 1.221119773210489) internal successors, (10338), 8830 states have internal predecessors, (10338), 4955 states have call successors, (4955), 1497 states have call predecessors, (4955), 1485 states have return successors, (4999), 4844 states have call predecessors, (4999), 4955 states have call successors, (4999) [2021-11-23 02:29:15,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14908 states to 14908 states and 20292 transitions. [2021-11-23 02:29:15,966 INFO L78 Accepts]: Start accepts. Automaton has 14908 states and 20292 transitions. Word has length 260 [2021-11-23 02:29:15,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:29:15,966 INFO L470 AbstractCegarLoop]: Abstraction has 14908 states and 20292 transitions. [2021-11-23 02:29:15,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-23 02:29:15,967 INFO L276 IsEmpty]: Start isEmpty. Operand 14908 states and 20292 transitions. [2021-11-23 02:29:15,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-11-23 02:29:15,973 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:29:15,973 INFO L514 BasicCegarLoop]: trace histogram [16, 9, 9, 8, 8, 8, 8, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:29:15,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-23 02:29:15,974 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:29:15,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:29:15,974 INFO L85 PathProgramCache]: Analyzing trace with hash -756708939, now seen corresponding path program 1 times [2021-11-23 02:29:15,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:29:15,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123970954] [2021-11-23 02:29:15,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:15,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:29:16,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:16,185 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 563 trivial. 0 not checked. [2021-11-23 02:29:16,185 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:29:16,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123970954] [2021-11-23 02:29:16,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123970954] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:29:16,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:29:16,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:29:16,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654012514] [2021-11-23 02:29:16,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:29:16,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:29:16,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:29:16,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:29:16,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:29:16,189 INFO L87 Difference]: Start difference. First operand 14908 states and 20292 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-23 02:29:22,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:29:22,633 INFO L93 Difference]: Finished difference Result 14910 states and 20293 transitions. [2021-11-23 02:29:22,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:29:22,636 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), 2 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 262 [2021-11-23 02:29:22,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:29:22,735 INFO L225 Difference]: With dead ends: 14910 [2021-11-23 02:29:22,736 INFO L226 Difference]: Without dead ends: 14908 [2021-11-23 02:29:22,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:29:22,751 INFO L933 BasicCegarLoop]: 2408 mSDtfsCounter, 1131 mSDsluCounter, 7077 mSDsCounter, 0 mSdLazyCounter, 1225 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1132 SdHoareTripleChecker+Valid, 8596 SdHoareTripleChecker+Invalid, 1226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:29:22,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1132 Valid, 8596 Invalid, 1226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1225 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2021-11-23 02:29:22,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14908 states. [2021-11-23 02:29:24,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14908 to 14908. [2021-11-23 02:29:24,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14908 states, 8466 states have (on average 1.218521143397118) internal successors, (10316), 8830 states have internal predecessors, (10316), 4955 states have call successors, (4955), 1497 states have call predecessors, (4955), 1485 states have return successors, (4999), 4844 states have call predecessors, (4999), 4955 states have call successors, (4999) [2021-11-23 02:29:24,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14908 states to 14908 states and 20270 transitions. [2021-11-23 02:29:24,165 INFO L78 Accepts]: Start accepts. Automaton has 14908 states and 20270 transitions. Word has length 262 [2021-11-23 02:29:24,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:29:24,166 INFO L470 AbstractCegarLoop]: Abstraction has 14908 states and 20270 transitions. [2021-11-23 02:29:24,166 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), 2 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-23 02:29:24,166 INFO L276 IsEmpty]: Start isEmpty. Operand 14908 states and 20270 transitions. [2021-11-23 02:29:24,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2021-11-23 02:29:24,182 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:29:24,182 INFO L514 BasicCegarLoop]: trace histogram [16, 12, 12, 8, 8, 8, 8, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:29:24,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-23 02:29:24,183 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)] === [2021-11-23 02:29:24,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:29:24,184 INFO L85 PathProgramCache]: Analyzing trace with hash -319019120, now seen corresponding path program 1 times [2021-11-23 02:29:24,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:29:24,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652409930] [2021-11-23 02:29:24,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:24,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:29:24,301 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:29:24,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1335446282] [2021-11-23 02:29:24,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:24,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:29:24,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_107299b1-9252-4dbd-871f-f0f147adcb43/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:29:24,314 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_107299b1-9252-4dbd-871f-f0f147adcb43/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:29:24,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_107299b1-9252-4dbd-871f-f0f147adcb43/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:29:25,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:25,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 4037 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:29:25,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:29:26,328 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 166 proven. 0 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2021-11-23 02:29:26,328 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:29:26,328 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:29:26,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652409930] [2021-11-23 02:29:26,329 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:29:26,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335446282] [2021-11-23 02:29:26,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335446282] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:29:26,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:29:26,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:29:26,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597564005] [2021-11-23 02:29:26,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:29:26,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:29:26,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:29:26,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:29:26,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:29:26,333 INFO L87 Difference]: Start difference. First operand 14908 states and 20270 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 2 states have call successors, (49), 2 states have call predecessors, (49), 2 states have return successors, (48), 2 states have call predecessors, (48), 2 states have call successors, (48) [2021-11-23 02:29:30,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:29:30,151 INFO L93 Difference]: Finished difference Result 31688 states and 43582 transitions. [2021-11-23 02:29:30,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:29:30,152 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 2 states have call successors, (49), 2 states have call predecessors, (49), 2 states have return successors, (48), 2 states have call predecessors, (48), 2 states have call successors, (48) Word has length 369 [2021-11-23 02:29:30,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:29:30,258 INFO L225 Difference]: With dead ends: 31688 [2021-11-23 02:29:30,258 INFO L226 Difference]: Without dead ends: 16850 [2021-11-23 02:29:30,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 367 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:29:30,334 INFO L933 BasicCegarLoop]: 2641 mSDtfsCounter, 163 mSDsluCounter, 2775 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 5100 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:29:30,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 5100 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-23 02:29:30,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16850 states. [2021-11-23 02:29:31,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16850 to 14914. [2021-11-23 02:29:31,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14914 states, 8472 states have (on average 1.2183663833805476) internal successors, (10322), 8836 states have internal predecessors, (10322), 4955 states have call successors, (4955), 1497 states have call predecessors, (4955), 1485 states have return successors, (4999), 4844 states have call predecessors, (4999), 4955 states have call successors, (4999) [2021-11-23 02:29:31,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14914 states to 14914 states and 20276 transitions. [2021-11-23 02:29:31,461 INFO L78 Accepts]: Start accepts. Automaton has 14914 states and 20276 transitions. Word has length 369 [2021-11-23 02:29:31,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:29:31,461 INFO L470 AbstractCegarLoop]: Abstraction has 14914 states and 20276 transitions. [2021-11-23 02:29:31,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 2 states have call successors, (49), 2 states have call predecessors, (49), 2 states have return successors, (48), 2 states have call predecessors, (48), 2 states have call successors, (48) [2021-11-23 02:29:31,462 INFO L276 IsEmpty]: Start isEmpty. Operand 14914 states and 20276 transitions. [2021-11-23 02:29:31,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2021-11-23 02:29:31,477 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:29:31,477 INFO L514 BasicCegarLoop]: trace histogram [17, 12, 12, 9, 9, 9, 9, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:29:31,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_107299b1-9252-4dbd-871f-f0f147adcb43/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:29:31,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_107299b1-9252-4dbd-871f-f0f147adcb43/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:29:31,704 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)] === [2021-11-23 02:29:31,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:29:31,705 INFO L85 PathProgramCache]: Analyzing trace with hash -647410518, now seen corresponding path program 1 times [2021-11-23 02:29:31,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:29:31,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254550625] [2021-11-23 02:29:31,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:31,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:29:31,863 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:29:31,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1204333716] [2021-11-23 02:29:31,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:31,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:29:31,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_107299b1-9252-4dbd-871f-f0f147adcb43/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:29:31,865 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_107299b1-9252-4dbd-871f-f0f147adcb43/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:29:31,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_107299b1-9252-4dbd-871f-f0f147adcb43/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:29:33,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:33,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 4131 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:29:33,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:29:33,799 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 262 proven. 0 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-11-23 02:29:33,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:29:33,799 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:29:33,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254550625] [2021-11-23 02:29:33,800 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:29:33,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204333716] [2021-11-23 02:29:33,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204333716] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:29:33,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:29:33,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:29:33,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218497441] [2021-11-23 02:29:33,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:29:33,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:29:33,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:29:33,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:29:33,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:29:33,803 INFO L87 Difference]: Start difference. First operand 14914 states and 20276 transitions. Second operand has 4 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 2 states have call successors, (54), 2 states have call predecessors, (54), 2 states have return successors, (53), 2 states have call predecessors, (53), 2 states have call successors, (53) [2021-11-23 02:29:38,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:29:38,155 INFO L93 Difference]: Finished difference Result 29812 states and 40612 transitions. [2021-11-23 02:29:38,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:29:38,156 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 2 states have call successors, (54), 2 states have call predecessors, (54), 2 states have return successors, (53), 2 states have call predecessors, (53), 2 states have call successors, (53) Word has length 383 [2021-11-23 02:29:38,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:29:38,237 INFO L225 Difference]: With dead ends: 29812 [2021-11-23 02:29:38,237 INFO L226 Difference]: Without dead ends: 14968 [2021-11-23 02:29:38,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:29:38,307 INFO L933 BasicCegarLoop]: 2409 mSDtfsCounter, 13 mSDsluCounter, 5441 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 7216 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:29:38,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 7216 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 961 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-23 02:29:38,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14968 states. [2021-11-23 02:29:39,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14968 to 14926. [2021-11-23 02:29:39,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14926 states, 8484 states have (on average 1.2180575200377182) internal successors, (10334), 8848 states have internal predecessors, (10334), 4955 states have call successors, (4955), 1497 states have call predecessors, (4955), 1485 states have return successors, (4999), 4844 states have call predecessors, (4999), 4955 states have call successors, (4999) [2021-11-23 02:29:39,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14926 states to 14926 states and 20288 transitions. [2021-11-23 02:29:39,436 INFO L78 Accepts]: Start accepts. Automaton has 14926 states and 20288 transitions. Word has length 383 [2021-11-23 02:29:39,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:29:39,437 INFO L470 AbstractCegarLoop]: Abstraction has 14926 states and 20288 transitions. [2021-11-23 02:29:39,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 2 states have call successors, (54), 2 states have call predecessors, (54), 2 states have return successors, (53), 2 states have call predecessors, (53), 2 states have call successors, (53) [2021-11-23 02:29:39,437 INFO L276 IsEmpty]: Start isEmpty. Operand 14926 states and 20288 transitions. [2021-11-23 02:29:39,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2021-11-23 02:29:39,447 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:29:39,448 INFO L514 BasicCegarLoop]: trace histogram [17, 12, 12, 9, 9, 9, 9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:29:39,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_107299b1-9252-4dbd-871f-f0f147adcb43/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:29:39,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_107299b1-9252-4dbd-871f-f0f147adcb43/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-23 02:29:39,648 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:29:39,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:29:39,649 INFO L85 PathProgramCache]: Analyzing trace with hash -230359092, now seen corresponding path program 1 times [2021-11-23 02:29:39,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:29:39,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904251436] [2021-11-23 02:29:39,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:39,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:29:39,769 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:29:39,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1252966064] [2021-11-23 02:29:39,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:39,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:29:39,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_107299b1-9252-4dbd-871f-f0f147adcb43/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:29:39,772 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_107299b1-9252-4dbd-871f-f0f147adcb43/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:29:39,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_107299b1-9252-4dbd-871f-f0f147adcb43/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:29:40,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:40,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 4294 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:29:40,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:29:41,567 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 272 proven. 0 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2021-11-23 02:29:41,567 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:29:41,567 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:29:41,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904251436] [2021-11-23 02:29:41,567 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:29:41,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252966064] [2021-11-23 02:29:41,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252966064] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:29:41,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:29:41,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:29:41,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632279689] [2021-11-23 02:29:41,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:29:41,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:29:41,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:29:41,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:29:41,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:29:41,570 INFO L87 Difference]: Start difference. First operand 14926 states and 20288 transitions. Second operand has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 2 states have call successors, (56), 2 states have call predecessors, (56), 2 states have return successors, (55), 2 states have call predecessors, (55), 2 states have call successors, (55) [2021-11-23 02:29:46,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:29:46,925 INFO L93 Difference]: Finished difference Result 29842 states and 40648 transitions. [2021-11-23 02:29:46,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:29:46,926 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 2 states have call successors, (56), 2 states have call predecessors, (56), 2 states have return successors, (55), 2 states have call predecessors, (55), 2 states have call successors, (55) Word has length 400 [2021-11-23 02:29:46,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:29:46,986 INFO L225 Difference]: With dead ends: 29842 [2021-11-23 02:29:46,986 INFO L226 Difference]: Without dead ends: 14986 [2021-11-23 02:29:47,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:29:47,031 INFO L933 BasicCegarLoop]: 2413 mSDtfsCounter, 13 mSDsluCounter, 5442 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 7220 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:29:47,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 7220 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 962 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-11-23 02:29:47,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14986 states. [2021-11-23 02:29:47,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14986 to 14938. [2021-11-23 02:29:47,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14938 states, 8496 states have (on average 1.2177495291902072) internal successors, (10346), 8860 states have internal predecessors, (10346), 4955 states have call successors, (4955), 1497 states have call predecessors, (4955), 1485 states have return successors, (4999), 4844 states have call predecessors, (4999), 4955 states have call successors, (4999) [2021-11-23 02:29:48,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14938 states to 14938 states and 20300 transitions. [2021-11-23 02:29:48,008 INFO L78 Accepts]: Start accepts. Automaton has 14938 states and 20300 transitions. Word has length 400 [2021-11-23 02:29:48,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:29:48,009 INFO L470 AbstractCegarLoop]: Abstraction has 14938 states and 20300 transitions. [2021-11-23 02:29:48,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 2 states have call successors, (56), 2 states have call predecessors, (56), 2 states have return successors, (55), 2 states have call predecessors, (55), 2 states have call successors, (55) [2021-11-23 02:29:48,009 INFO L276 IsEmpty]: Start isEmpty. Operand 14938 states and 20300 transitions. [2021-11-23 02:29:48,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2021-11-23 02:29:48,020 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:29:48,021 INFO L514 BasicCegarLoop]: trace histogram [17, 12, 12, 9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:29:48,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_107299b1-9252-4dbd-871f-f0f147adcb43/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:29:48,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_107299b1-9252-4dbd-871f-f0f147adcb43/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-23 02:29:48,223 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:29:48,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:29:48,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1909751398, now seen corresponding path program 1 times [2021-11-23 02:29:48,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:29:48,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601451662] [2021-11-23 02:29:48,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:48,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:29:48,364 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:29:48,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [179137106] [2021-11-23 02:29:48,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:48,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:29:48,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_107299b1-9252-4dbd-871f-f0f147adcb43/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:29:48,367 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_107299b1-9252-4dbd-871f-f0f147adcb43/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:29:48,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_107299b1-9252-4dbd-871f-f0f147adcb43/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:29:49,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:49,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 4605 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:29:49,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:29:50,500 INFO L134 CoverageAnalysis]: Checked inductivity of 881 backedges. 242 proven. 0 refuted. 0 times theorem prover too weak. 639 trivial. 0 not checked. [2021-11-23 02:29:50,500 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:29:50,500 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:29:50,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601451662] [2021-11-23 02:29:50,500 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:29:50,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179137106] [2021-11-23 02:29:50,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179137106] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:29:50,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:29:50,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:29:50,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694668019] [2021-11-23 02:29:50,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:29:50,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:29:50,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:29:50,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:29:50,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:29:50,502 INFO L87 Difference]: Start difference. First operand 14938 states and 20300 transitions. Second operand has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 2 states have call successors, (57), 2 states have call predecessors, (57), 2 states have return successors, (56), 2 states have call predecessors, (56), 2 states have call successors, (56) [2021-11-23 02:29:54,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:29:54,834 INFO L93 Difference]: Finished difference Result 29872 states and 40684 transitions. [2021-11-23 02:29:54,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:29:54,835 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 2 states have call successors, (57), 2 states have call predecessors, (57), 2 states have return successors, (56), 2 states have call predecessors, (56), 2 states have call successors, (56) Word has length 431 [2021-11-23 02:29:54,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:29:54,893 INFO L225 Difference]: With dead ends: 29872 [2021-11-23 02:29:54,893 INFO L226 Difference]: Without dead ends: 15004 [2021-11-23 02:29:54,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 428 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:29:54,933 INFO L933 BasicCegarLoop]: 2415 mSDtfsCounter, 13 mSDsluCounter, 5446 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 7225 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:29:54,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 7225 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 963 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-23 02:29:54,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15004 states. [2021-11-23 02:29:55,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15004 to 14950. [2021-11-23 02:29:55,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14950 states, 8508 states have (on average 1.2174424071462153) internal successors, (10358), 8872 states have internal predecessors, (10358), 4955 states have call successors, (4955), 1497 states have call predecessors, (4955), 1485 states have return successors, (4999), 4844 states have call predecessors, (4999), 4955 states have call successors, (4999) [2021-11-23 02:29:55,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14950 states to 14950 states and 20312 transitions. [2021-11-23 02:29:55,755 INFO L78 Accepts]: Start accepts. Automaton has 14950 states and 20312 transitions. Word has length 431 [2021-11-23 02:29:55,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:29:55,756 INFO L470 AbstractCegarLoop]: Abstraction has 14950 states and 20312 transitions. [2021-11-23 02:29:55,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 2 states have call successors, (57), 2 states have call predecessors, (57), 2 states have return successors, (56), 2 states have call predecessors, (56), 2 states have call successors, (56) [2021-11-23 02:29:55,757 INFO L276 IsEmpty]: Start isEmpty. Operand 14950 states and 20312 transitions. [2021-11-23 02:29:55,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2021-11-23 02:29:55,772 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:29:55,772 INFO L514 BasicCegarLoop]: trace histogram [17, 12, 12, 9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:29:55,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_107299b1-9252-4dbd-871f-f0f147adcb43/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:29:55,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_107299b1-9252-4dbd-871f-f0f147adcb43/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:29:56,000 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:29:56,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:29:56,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1523800266, now seen corresponding path program 1 times [2021-11-23 02:29:56,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:29:56,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054687166] [2021-11-23 02:29:56,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:56,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:29:56,111 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:29:56,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1532331783] [2021-11-23 02:29:56,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:56,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:29:56,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_107299b1-9252-4dbd-871f-f0f147adcb43/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:29:56,113 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_107299b1-9252-4dbd-871f-f0f147adcb43/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:29:56,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_107299b1-9252-4dbd-871f-f0f147adcb43/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:29:57,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:57,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 4634 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:29:57,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:29:58,223 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-11-23 02:29:58,223 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:29:58,224 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:29:58,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054687166] [2021-11-23 02:29:58,224 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:29:58,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532331783] [2021-11-23 02:29:58,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532331783] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:29:58,224 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:29:58,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:29:58,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17724700] [2021-11-23 02:29:58,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:29:58,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:29:58,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:29:58,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:29:58,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:29:58,226 INFO L87 Difference]: Start difference. First operand 14950 states and 20312 transitions. Second operand has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 2 states have call successors, (57), 2 states have call predecessors, (57), 2 states have return successors, (56), 2 states have call predecessors, (56), 2 states have call successors, (56) [2021-11-23 02:30:01,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:30:01,780 INFO L93 Difference]: Finished difference Result 29902 states and 40716 transitions. [2021-11-23 02:30:01,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:30:01,781 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 2 states have call successors, (57), 2 states have call predecessors, (57), 2 states have return successors, (56), 2 states have call predecessors, (56), 2 states have call successors, (56) Word has length 436 [2021-11-23 02:30:01,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:30:01,840 INFO L225 Difference]: With dead ends: 29902 [2021-11-23 02:30:01,840 INFO L226 Difference]: Without dead ends: 15022 [2021-11-23 02:30:01,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:30:01,888 INFO L933 BasicCegarLoop]: 2417 mSDtfsCounter, 13 mSDsluCounter, 5448 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 7230 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:30:01,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 7230 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 962 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-23 02:30:01,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15022 states. [2021-11-23 02:30:02,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15022 to 14962. [2021-11-23 02:30:02,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14962 states, 8520 states have (on average 1.2171361502347418) internal successors, (10370), 8884 states have internal predecessors, (10370), 4955 states have call successors, (4955), 1497 states have call predecessors, (4955), 1485 states have return successors, (4999), 4844 states have call predecessors, (4999), 4955 states have call successors, (4999) [2021-11-23 02:30:02,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14962 states to 14962 states and 20324 transitions. [2021-11-23 02:30:02,897 INFO L78 Accepts]: Start accepts. Automaton has 14962 states and 20324 transitions. Word has length 436 [2021-11-23 02:30:02,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:30:02,898 INFO L470 AbstractCegarLoop]: Abstraction has 14962 states and 20324 transitions. [2021-11-23 02:30:02,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 2 states have call successors, (57), 2 states have call predecessors, (57), 2 states have return successors, (56), 2 states have call predecessors, (56), 2 states have call successors, (56) [2021-11-23 02:30:02,898 INFO L276 IsEmpty]: Start isEmpty. Operand 14962 states and 20324 transitions. [2021-11-23 02:30:02,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2021-11-23 02:30:02,914 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:30:02,915 INFO L514 BasicCegarLoop]: trace histogram [17, 12, 12, 9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:30:02,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_107299b1-9252-4dbd-871f-f0f147adcb43/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:30:03,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_107299b1-9252-4dbd-871f-f0f147adcb43/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-23 02:30:03,128 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:30:03,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:30:03,128 INFO L85 PathProgramCache]: Analyzing trace with hash -2016404495, now seen corresponding path program 1 times [2021-11-23 02:30:03,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:30:03,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723434434] [2021-11-23 02:30:03,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:30:03,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:30:03,250 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:30:03,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1379270612] [2021-11-23 02:30:03,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:30:03,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:30:03,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_107299b1-9252-4dbd-871f-f0f147adcb43/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:30:03,253 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_107299b1-9252-4dbd-871f-f0f147adcb43/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:30:03,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_107299b1-9252-4dbd-871f-f0f147adcb43/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 02:30:04,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:30:04,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 4636 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:30:04,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:30:05,327 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 170 proven. 1 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-11-23 02:30:05,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:30:06,468 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 871 trivial. 0 not checked. [2021-11-23 02:30:06,468 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:30:06,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723434434] [2021-11-23 02:30:06,468 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:30:06,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379270612] [2021-11-23 02:30:06,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379270612] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:30:06,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2021422159] [2021-11-23 02:30:06,506 INFO L159 IcfgInterpreter]: Started Sifa with 237 locations of interest [2021-11-23 02:30:06,506 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:30:06,513 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:30:06,519 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:30:06,520 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs