./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-packetengines-hamachi.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea50cad4-2586-4e50-931e-a677ef5f490e/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea50cad4-2586-4e50-931e-a677ef5f490e/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea50cad4-2586-4e50-931e-a677ef5f490e/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea50cad4-2586-4e50-931e-a677ef5f490e/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-packetengines-hamachi.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea50cad4-2586-4e50-931e-a677ef5f490e/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea50cad4-2586-4e50-931e-a677ef5f490e/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 141cc550f279b59aa80e553b6a405c5654c50ab0a30e94ad7616006c63d0c81e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:14:45,231 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:14:45,233 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:14:45,265 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:14:45,266 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:14:45,267 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:14:45,268 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:14:45,271 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:14:45,273 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:14:45,274 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:14:45,275 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:14:45,277 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:14:45,277 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:14:45,278 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:14:45,280 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:14:45,281 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:14:45,282 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:14:45,283 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:14:45,285 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:14:45,288 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:14:45,290 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:14:45,292 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:14:45,294 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:14:45,295 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:14:45,299 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:14:45,300 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:14:45,300 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:14:45,301 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:14:45,302 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:14:45,303 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:14:45,303 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:14:45,304 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:14:45,305 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:14:45,316 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:14:45,319 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:14:45,319 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:14:45,320 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:14:45,320 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:14:45,320 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:14:45,322 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:14:45,322 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:14:45,323 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea50cad4-2586-4e50-931e-a677ef5f490e/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-21 01:14:45,370 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:14:45,371 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:14:45,371 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:14:45,371 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:14:45,372 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:14:45,372 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:14:45,372 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:14:45,373 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:14:45,373 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:14:45,373 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:14:45,373 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:14:45,373 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:14:45,374 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:14:45,374 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:14:45,374 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:14:45,374 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:14:45,375 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:14:45,375 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:14:45,376 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:14:45,376 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:14:45,376 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:14:45,376 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:14:45,376 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:14:45,377 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:14:45,377 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:14:45,377 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:14:45,377 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:14:45,377 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:14:45,378 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:14:45,378 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:14:45,378 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:14:45,378 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:14:45,379 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:14:45,379 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:14:45,379 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:14:45,379 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:14:45,379 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:14:45,380 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:14:45,380 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_ea50cad4-2586-4e50-931e-a677ef5f490e/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea50cad4-2586-4e50-931e-a677ef5f490e/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 141cc550f279b59aa80e553b6a405c5654c50ab0a30e94ad7616006c63d0c81e [2021-11-21 01:14:45,678 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:14:45,700 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:14:45,703 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:14:45,704 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:14:45,705 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:14:45,707 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea50cad4-2586-4e50-931e-a677ef5f490e/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-packetengines-hamachi.cil.i [2021-11-21 01:14:45,771 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea50cad4-2586-4e50-931e-a677ef5f490e/bin/utaipan-TEXQjIfE4P/data/0a5789160/816d94e3fc07497490f6efa3065946fa/FLAG03b4dc442 [2021-11-21 01:14:46,818 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:14:46,819 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea50cad4-2586-4e50-931e-a677ef5f490e/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-packetengines-hamachi.cil.i [2021-11-21 01:14:46,880 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea50cad4-2586-4e50-931e-a677ef5f490e/bin/utaipan-TEXQjIfE4P/data/0a5789160/816d94e3fc07497490f6efa3065946fa/FLAG03b4dc442 [2021-11-21 01:14:47,091 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea50cad4-2586-4e50-931e-a677ef5f490e/bin/utaipan-TEXQjIfE4P/data/0a5789160/816d94e3fc07497490f6efa3065946fa [2021-11-21 01:14:47,095 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:14:47,098 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:14:47,104 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:14:47,104 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:14:47,108 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:14:47,110 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:14:47" (1/1) ... [2021-11-21 01:14:47,113 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7210966b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:47, skipping insertion in model container [2021-11-21 01:14:47,113 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:14:47" (1/1) ... [2021-11-21 01:14:47,121 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:14:47,290 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:14:50,463 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_ea50cad4-2586-4e50-931e-a677ef5f490e/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-packetengines-hamachi.cil.i[322818,322831] [2021-11-21 01:14:50,466 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_ea50cad4-2586-4e50-931e-a677ef5f490e/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-packetengines-hamachi.cil.i[322987,323000] [2021-11-21 01:14:50,467 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_ea50cad4-2586-4e50-931e-a677ef5f490e/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-packetengines-hamachi.cil.i[323154,323167] [2021-11-21 01:14:50,468 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_ea50cad4-2586-4e50-931e-a677ef5f490e/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-packetengines-hamachi.cil.i[323322,323335] [2021-11-21 01:14:50,490 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:14:50,547 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:14:50,927 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_ea50cad4-2586-4e50-931e-a677ef5f490e/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-packetengines-hamachi.cil.i[322818,322831] [2021-11-21 01:14:50,927 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_ea50cad4-2586-4e50-931e-a677ef5f490e/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-packetengines-hamachi.cil.i[322987,323000] [2021-11-21 01:14:50,928 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_ea50cad4-2586-4e50-931e-a677ef5f490e/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-packetengines-hamachi.cil.i[323154,323167] [2021-11-21 01:14:50,928 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_ea50cad4-2586-4e50-931e-a677ef5f490e/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-packetengines-hamachi.cil.i[323322,323335] [2021-11-21 01:14:50,938 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:14:51,251 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:14:51,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:51 WrapperNode [2021-11-21 01:14:51,253 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:14:51,254 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:14:51,254 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:14:51,255 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:14:51,274 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:51" (1/1) ... [2021-11-21 01:14:51,425 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:51" (1/1) ... [2021-11-21 01:14:51,660 INFO L137 Inliner]: procedures = 412, calls = 1826, calls flagged for inlining = 207, calls inlined = 191, statements flattened = 4587 [2021-11-21 01:14:51,660 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:14:51,661 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:14:51,661 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:14:51,662 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:14:51,672 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:51" (1/1) ... [2021-11-21 01:14:51,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:51" (1/1) ... [2021-11-21 01:14:51,732 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:51" (1/1) ... [2021-11-21 01:14:51,733 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:51" (1/1) ... [2021-11-21 01:14:51,862 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:51" (1/1) ... [2021-11-21 01:14:51,895 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:51" (1/1) ... [2021-11-21 01:14:51,958 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:51" (1/1) ... [2021-11-21 01:14:52,040 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:14:52,041 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:14:52,041 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:14:52,041 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:14:52,047 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:51" (1/1) ... [2021-11-21 01:14:52,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:14:52,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea50cad4-2586-4e50-931e-a677ef5f490e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:14:52,130 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea50cad4-2586-4e50-931e-a677ef5f490e/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:14:52,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea50cad4-2586-4e50-931e-a677ef5f490e/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:14:52,235 INFO L130 BoogieDeclarations]: Found specification of procedure check_if_running [2021-11-21 01:14:52,235 INFO L138 BoogieDeclarations]: Found implementation of procedure check_if_running [2021-11-21 01:14:52,235 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2021-11-21 01:14:52,235 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2021-11-21 01:14:52,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-21 01:14:52,236 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-21 01:14:52,236 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_alloc_skb [2021-11-21 01:14:52,236 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_alloc_skb [2021-11-21 01:14:52,236 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-21 01:14:52,236 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-21 01:14:52,236 INFO L130 BoogieDeclarations]: Found specification of procedure hamachi_close [2021-11-21 01:14:52,236 INFO L138 BoogieDeclarations]: Found implementation of procedure hamachi_close [2021-11-21 01:14:52,237 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-21 01:14:52,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-21 01:14:52,238 INFO L130 BoogieDeclarations]: Found specification of procedure pci_dma_sync_single_for_cpu [2021-11-21 01:14:52,238 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_dma_sync_single_for_cpu [2021-11-21 01:14:52,238 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-21 01:14:52,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-21 01:14:52,239 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2021-11-21 01:14:52,239 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2021-11-21 01:14:52,239 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_lock_of_hamachi_private [2021-11-21 01:14:52,239 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_lock_of_hamachi_private [2021-11-21 01:14:52,239 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-21 01:14:52,239 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-21 01:14:52,239 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-11-21 01:14:52,240 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-11-21 01:14:52,240 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-21 01:14:52,240 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-21 01:14:52,240 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-21 01:14:52,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-21 01:14:52,240 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_single [2021-11-21 01:14:52,240 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_single [2021-11-21 01:14:52,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:14:52,241 INFO L130 BoogieDeclarations]: Found specification of procedure iounmap [2021-11-21 01:14:52,241 INFO L138 BoogieDeclarations]: Found implementation of procedure iounmap [2021-11-21 01:14:52,241 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-21 01:14:52,241 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-21 01:14:52,241 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-21 01:14:52,242 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-21 01:14:52,242 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-21 01:14:52,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-21 01:14:52,242 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-21 01:14:52,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-21 01:14:52,243 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 01:14:52,244 INFO L130 BoogieDeclarations]: Found specification of procedure set_rx_mode [2021-11-21 01:14:52,244 INFO L138 BoogieDeclarations]: Found implementation of procedure set_rx_mode [2021-11-21 01:14:52,244 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2021-11-21 01:14:52,244 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2021-11-21 01:14:52,244 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_interrupt_context [2021-11-21 01:14:52,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_interrupt_context [2021-11-21 01:14:52,245 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2021-11-21 01:14:52,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2021-11-21 01:14:52,245 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2021-11-21 01:14:52,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2021-11-21 01:14:52,246 INFO L130 BoogieDeclarations]: Found specification of procedure __netdev_alloc_skb [2021-11-21 01:14:52,246 INFO L138 BoogieDeclarations]: Found implementation of procedure __netdev_alloc_skb [2021-11-21 01:14:52,246 INFO L130 BoogieDeclarations]: Found specification of procedure pci_free_consistent [2021-11-21 01:14:52,246 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_free_consistent [2021-11-21 01:14:52,246 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-21 01:14:52,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-21 01:14:52,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 01:14:52,246 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_1 [2021-11-21 01:14:52,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_1 [2021-11-21 01:14:52,247 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_0 [2021-11-21 01:14:52,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_0 [2021-11-21 01:14:52,247 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_2 [2021-11-21 01:14:52,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_2 [2021-11-21 01:14:52,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:14:52,248 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-21 01:14:52,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-21 01:14:52,248 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-21 01:14:52,248 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-21 01:14:52,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 01:14:52,249 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-21 01:14:52,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-21 01:14:52,249 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-21 01:14:52,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-21 01:14:52,249 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_lock_of_hamachi_private [2021-11-21 01:14:52,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_lock_of_hamachi_private [2021-11-21 01:14:52,250 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~TO~VOID [2021-11-21 01:14:52,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~TO~VOID [2021-11-21 01:14:52,250 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-21 01:14:52,250 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-21 01:14:52,251 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2021-11-21 01:14:52,251 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2021-11-21 01:14:52,251 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2021-11-21 01:14:52,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2021-11-21 01:14:52,252 INFO L130 BoogieDeclarations]: Found specification of procedure writel [2021-11-21 01:14:52,253 INFO L138 BoogieDeclarations]: Found implementation of procedure writel [2021-11-21 01:14:52,253 INFO L130 BoogieDeclarations]: Found specification of procedure writeb [2021-11-21 01:14:52,253 INFO L138 BoogieDeclarations]: Found implementation of procedure writeb [2021-11-21 01:14:52,253 INFO L130 BoogieDeclarations]: Found specification of procedure writew [2021-11-21 01:14:52,253 INFO L138 BoogieDeclarations]: Found implementation of procedure writew [2021-11-21 01:14:52,253 INFO L130 BoogieDeclarations]: Found specification of procedure hamachi_nway_reset [2021-11-21 01:14:52,253 INFO L138 BoogieDeclarations]: Found implementation of procedure hamachi_nway_reset [2021-11-21 01:14:52,253 INFO L130 BoogieDeclarations]: Found specification of procedure mdio_read [2021-11-21 01:14:52,253 INFO L138 BoogieDeclarations]: Found implementation of procedure mdio_read [2021-11-21 01:14:52,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:14:52,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:14:52,254 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-21 01:14:52,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-21 01:14:52,254 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-21 01:14:52,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-21 01:14:52,255 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-21 01:14:52,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-21 01:14:52,256 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_EMGentry_exit_hamachi_exit_15_2 [2021-11-21 01:14:52,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_EMGentry_exit_hamachi_exit_15_2 [2021-11-21 01:14:52,259 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_process_context [2021-11-21 01:14:52,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_process_context [2021-11-21 01:14:52,259 INFO L130 BoogieDeclarations]: Found specification of procedure pci_map_single [2021-11-21 01:14:52,260 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_map_single [2021-11-21 01:14:52,261 INFO L130 BoogieDeclarations]: Found specification of procedure hamachi_open [2021-11-21 01:14:52,261 INFO L138 BoogieDeclarations]: Found implementation of procedure hamachi_open [2021-11-21 01:14:52,261 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-21 01:14:52,261 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-21 01:14:52,266 INFO L130 BoogieDeclarations]: Found specification of procedure pci_alloc_consistent [2021-11-21 01:14:52,267 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_alloc_consistent [2021-11-21 01:14:52,267 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2021-11-21 01:14:52,267 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2021-11-21 01:14:52,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:14:52,267 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-11-21 01:14:52,267 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-11-21 01:14:52,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 01:14:52,267 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2021-11-21 01:14:52,268 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2021-11-21 01:14:52,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 01:14:52,268 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~structbegin~int~structend~~TO~int [2021-11-21 01:14:52,268 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~structbegin~int~structend~~TO~int [2021-11-21 01:14:52,268 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2021-11-21 01:14:52,268 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2021-11-21 01:14:52,268 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-21 01:14:52,268 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-21 01:14:52,268 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_irq_68 [2021-11-21 01:14:52,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_irq_68 [2021-11-21 01:14:52,269 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-21 01:14:52,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-21 01:14:52,269 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reserve [2021-11-21 01:14:52,269 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reserve [2021-11-21 01:14:52,269 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-11-21 01:14:52,269 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-11-21 01:14:52,269 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-21 01:14:52,269 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-21 01:14:52,270 INFO L130 BoogieDeclarations]: Found specification of procedure hamachi_remove_one [2021-11-21 01:14:52,270 INFO L138 BoogieDeclarations]: Found implementation of procedure hamachi_remove_one [2021-11-21 01:14:52,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 01:14:52,270 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-21 01:14:52,270 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-21 01:14:52,270 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irq_69 [2021-11-21 01:14:52,270 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irq_69 [2021-11-21 01:14:52,270 INFO L130 BoogieDeclarations]: Found specification of procedure hamachi_get_stats [2021-11-21 01:14:52,270 INFO L138 BoogieDeclarations]: Found implementation of procedure hamachi_get_stats [2021-11-21 01:14:52,270 INFO L130 BoogieDeclarations]: Found specification of procedure hamachi_tx_timeout [2021-11-21 01:14:52,271 INFO L138 BoogieDeclarations]: Found implementation of procedure hamachi_tx_timeout [2021-11-21 01:14:52,271 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-21 01:14:52,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-21 01:14:52,271 INFO L130 BoogieDeclarations]: Found specification of procedure readw [2021-11-21 01:14:52,271 INFO L138 BoogieDeclarations]: Found implementation of procedure readw [2021-11-21 01:14:52,271 INFO L130 BoogieDeclarations]: Found specification of procedure readl [2021-11-21 01:14:52,271 INFO L138 BoogieDeclarations]: Found implementation of procedure readl [2021-11-21 01:14:52,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:14:52,271 INFO L130 BoogieDeclarations]: Found specification of procedure hamachi_timer [2021-11-21 01:14:52,272 INFO L138 BoogieDeclarations]: Found implementation of procedure hamachi_timer [2021-11-21 01:14:52,272 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-21 01:14:52,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-21 01:14:52,272 INFO L130 BoogieDeclarations]: Found specification of procedure readb [2021-11-21 01:14:52,272 INFO L138 BoogieDeclarations]: Found implementation of procedure readb [2021-11-21 01:14:53,104 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:14:53,107 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:14:53,383 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-21 01:14:56,475 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-21 01:14:56,533 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:14:57,762 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:14:57,762 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-21 01:14:57,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:14:57 BoogieIcfgContainer [2021-11-21 01:14:57,768 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:14:57,770 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:14:57,770 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:14:57,774 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:14:57,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:14:47" (1/3) ... [2021-11-21 01:14:57,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f5cbad6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:14:57, skipping insertion in model container [2021-11-21 01:14:57,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:51" (2/3) ... [2021-11-21 01:14:57,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f5cbad6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:14:57, skipping insertion in model container [2021-11-21 01:14:57,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:14:57" (3/3) ... [2021-11-21 01:14:57,777 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-packetengines-hamachi.cil.i [2021-11-21 01:14:57,783 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:14:57,783 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-21 01:14:57,851 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:14:57,859 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 01:14:57,860 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-21 01:14:57,920 INFO L276 IsEmpty]: Start isEmpty. Operand has 1131 states, 657 states have (on average 1.3287671232876712) internal successors, (873), 684 states have internal predecessors, (873), 397 states have call successors, (397), 75 states have call predecessors, (397), 74 states have return successors, (390), 377 states have call predecessors, (390), 390 states have call successors, (390) [2021-11-21 01:14:57,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-21 01:14:57,941 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:14:57,942 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 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] [2021-11-21 01:14:57,943 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:14:57,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:14:57,950 INFO L85 PathProgramCache]: Analyzing trace with hash -2014580670, now seen corresponding path program 1 times [2021-11-21 01:14:57,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:14:57,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083562278] [2021-11-21 01:14:57,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:14:57,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:14:58,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:14:58,809 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2021-11-21 01:14:58,809 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:14:58,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083562278] [2021-11-21 01:14:58,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083562278] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:14:58,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:14:58,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:14:58,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116423664] [2021-11-21 01:14:58,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:14:58,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:14:58,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:14:58,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:14:58,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:14:58,854 INFO L87 Difference]: Start difference. First operand has 1131 states, 657 states have (on average 1.3287671232876712) internal successors, (873), 684 states have internal predecessors, (873), 397 states have call successors, (397), 75 states have call predecessors, (397), 74 states have return successors, (390), 377 states have call predecessors, (390), 390 states have call successors, (390) Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-21 01:15:02,588 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:15:02,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:15:02,699 INFO L93 Difference]: Finished difference Result 3213 states and 4751 transitions. [2021-11-21 01:15:02,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:15:02,702 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 114 [2021-11-21 01:15:02,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:15:02,759 INFO L225 Difference]: With dead ends: 3213 [2021-11-21 01:15:02,759 INFO L226 Difference]: Without dead ends: 2090 [2021-11-21 01:15:02,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:15:02,786 INFO L933 BasicCegarLoop]: 1729 mSDtfsCounter, 1440 mSDsluCounter, 1601 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1440 SdHoareTripleChecker+Valid, 3095 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:15:02,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1440 Valid, 3095 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 518 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2021-11-21 01:15:02,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2021-11-21 01:15:03,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 2085. [2021-11-21 01:15:03,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2085 states, 1228 states have (on average 1.3200325732899023) internal successors, (1621), 1280 states have internal predecessors, (1621), 711 states have call successors, (711), 144 states have call predecessors, (711), 143 states have return successors, (707), 681 states have call predecessors, (707), 707 states have call successors, (707) [2021-11-21 01:15:03,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2085 states to 2085 states and 3039 transitions. [2021-11-21 01:15:03,178 INFO L78 Accepts]: Start accepts. Automaton has 2085 states and 3039 transitions. Word has length 114 [2021-11-21 01:15:03,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:15:03,180 INFO L470 AbstractCegarLoop]: Abstraction has 2085 states and 3039 transitions. [2021-11-21 01:15:03,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-21 01:15:03,186 INFO L276 IsEmpty]: Start isEmpty. Operand 2085 states and 3039 transitions. [2021-11-21 01:15:03,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-21 01:15:03,198 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:15:03,198 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:15:03,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:15:03,199 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:15:03,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:15:03,202 INFO L85 PathProgramCache]: Analyzing trace with hash 694955965, now seen corresponding path program 1 times [2021-11-21 01:15:03,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:15:03,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815478357] [2021-11-21 01:15:03,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:15:03,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:15:03,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:15:03,504 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2021-11-21 01:15:03,505 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:15:03,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815478357] [2021-11-21 01:15:03,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815478357] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:15:03,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:15:03,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:15:03,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971130005] [2021-11-21 01:15:03,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:15:03,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:15:03,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:15:03,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:15:03,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:15:03,513 INFO L87 Difference]: Start difference. First operand 2085 states and 3039 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, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-21 01:15:07,162 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:15:07,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:15:07,277 INFO L93 Difference]: Finished difference Result 5802 states and 8445 transitions. [2021-11-21 01:15:07,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:15:07,278 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, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 113 [2021-11-21 01:15:07,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:15:07,324 INFO L225 Difference]: With dead ends: 5802 [2021-11-21 01:15:07,324 INFO L226 Difference]: Without dead ends: 3736 [2021-11-21 01:15:07,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:15:07,343 INFO L933 BasicCegarLoop]: 1743 mSDtfsCounter, 1277 mSDsluCounter, 1576 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1277 SdHoareTripleChecker+Valid, 3085 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:15:07,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1277 Valid, 3085 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 500 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2021-11-21 01:15:07,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3736 states. [2021-11-21 01:15:07,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3736 to 3706. [2021-11-21 01:15:07,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3706 states, 2177 states have (on average 1.3201653651814425) internal successors, (2874), 2274 states have internal predecessors, (2874), 1252 states have call successors, (1252), 277 states have call predecessors, (1252), 274 states have return successors, (1264), 1189 states have call predecessors, (1264), 1248 states have call successors, (1264) [2021-11-21 01:15:07,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3706 states to 3706 states and 5390 transitions. [2021-11-21 01:15:07,739 INFO L78 Accepts]: Start accepts. Automaton has 3706 states and 5390 transitions. Word has length 113 [2021-11-21 01:15:07,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:15:07,740 INFO L470 AbstractCegarLoop]: Abstraction has 3706 states and 5390 transitions. [2021-11-21 01:15:07,740 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, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-21 01:15:07,740 INFO L276 IsEmpty]: Start isEmpty. Operand 3706 states and 5390 transitions. [2021-11-21 01:15:07,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-21 01:15:07,752 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:15:07,752 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:15:07,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:15:07,753 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)] === [2021-11-21 01:15:07,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:15:07,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1974134420, now seen corresponding path program 1 times [2021-11-21 01:15:07,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:15:07,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028368404] [2021-11-21 01:15:07,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:15:07,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:15:07,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:15:08,020 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2021-11-21 01:15:08,021 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:15:08,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028368404] [2021-11-21 01:15:08,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028368404] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:15:08,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:15:08,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:15:08,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567611122] [2021-11-21 01:15:08,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:15:08,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:15:08,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:15:08,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:15:08,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:15:08,032 INFO L87 Difference]: Start difference. First operand 3706 states and 5390 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (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) [2021-11-21 01:15:10,953 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:15:11,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:15:11,871 INFO L93 Difference]: Finished difference Result 8656 states and 12545 transitions. [2021-11-21 01:15:11,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:15:11,872 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (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 117 [2021-11-21 01:15:11,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:15:11,919 INFO L225 Difference]: With dead ends: 8656 [2021-11-21 01:15:11,919 INFO L226 Difference]: Without dead ends: 4969 [2021-11-21 01:15:11,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:15:11,943 INFO L933 BasicCegarLoop]: 1700 mSDtfsCounter, 1284 mSDsluCounter, 1567 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1284 SdHoareTripleChecker+Valid, 3048 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:15:11,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1284 Valid, 3048 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 525 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2021-11-21 01:15:11,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4969 states. [2021-11-21 01:15:12,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4969 to 4942. [2021-11-21 01:15:12,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4942 states, 2868 states have (on average 1.3057880055788005) internal successors, (3745), 3007 states have internal predecessors, (3745), 1680 states have call successors, (1680), 395 states have call predecessors, (1680), 391 states have return successors, (1703), 1586 states have call predecessors, (1703), 1676 states have call successors, (1703) [2021-11-21 01:15:12,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4942 states to 4942 states and 7128 transitions. [2021-11-21 01:15:12,362 INFO L78 Accepts]: Start accepts. Automaton has 4942 states and 7128 transitions. Word has length 117 [2021-11-21 01:15:12,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:15:12,363 INFO L470 AbstractCegarLoop]: Abstraction has 4942 states and 7128 transitions. [2021-11-21 01:15:12,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (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) [2021-11-21 01:15:12,364 INFO L276 IsEmpty]: Start isEmpty. Operand 4942 states and 7128 transitions. [2021-11-21 01:15:12,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-21 01:15:12,370 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:15:12,370 INFO L514 BasicCegarLoop]: trace histogram [13, 9, 9, 9, 9, 9, 9, 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] [2021-11-21 01:15:12,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 01:15:12,370 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:15:12,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:15:12,371 INFO L85 PathProgramCache]: Analyzing trace with hash 837874871, now seen corresponding path program 1 times [2021-11-21 01:15:12,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:15:12,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734814042] [2021-11-21 01:15:12,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:15:12,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:15:12,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:15:12,662 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2021-11-21 01:15:12,662 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:15:12,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734814042] [2021-11-21 01:15:12,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734814042] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:15:12,663 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:15:12,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:15:12,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192481047] [2021-11-21 01:15:12,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:15:12,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:15:12,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:15:12,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:15:12,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:15:12,665 INFO L87 Difference]: Start difference. First operand 4942 states and 7128 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 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) [2021-11-21 01:15:15,964 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:15:16,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:15:16,984 INFO L93 Difference]: Finished difference Result 6541 states and 9406 transitions. [2021-11-21 01:15:16,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:15:16,985 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 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 158 [2021-11-21 01:15:16,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:15:17,039 INFO L225 Difference]: With dead ends: 6541 [2021-11-21 01:15:17,039 INFO L226 Difference]: Without dead ends: 6539 [2021-11-21 01:15:17,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:15:17,046 INFO L933 BasicCegarLoop]: 1691 mSDtfsCounter, 1270 mSDsluCounter, 5466 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1281 SdHoareTripleChecker+Valid, 6418 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:15:17,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1281 Valid, 6418 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1006 Invalid, 1 Unknown, 0 Unchecked, 4.0s Time] [2021-11-21 01:15:17,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6539 states. [2021-11-21 01:15:17,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6539 to 6532. [2021-11-21 01:15:17,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6532 states, 3776 states have (on average 1.30323093220339) internal successors, (4921), 3961 states have internal predecessors, (4921), 2226 states have call successors, (2226), 533 states have call predecessors, (2226), 527 states have return successors, (2253), 2099 states have call predecessors, (2253), 2218 states have call successors, (2253) [2021-11-21 01:15:17,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6532 states to 6532 states and 9400 transitions. [2021-11-21 01:15:17,500 INFO L78 Accepts]: Start accepts. Automaton has 6532 states and 9400 transitions. Word has length 158 [2021-11-21 01:15:17,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:15:17,501 INFO L470 AbstractCegarLoop]: Abstraction has 6532 states and 9400 transitions. [2021-11-21 01:15:17,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 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) [2021-11-21 01:15:17,501 INFO L276 IsEmpty]: Start isEmpty. Operand 6532 states and 9400 transitions. [2021-11-21 01:15:17,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-21 01:15:17,508 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:15:17,509 INFO L514 BasicCegarLoop]: trace histogram [13, 9, 9, 9, 9, 9, 9, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:15:17,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 01:15:17,510 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:15:17,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:15:17,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1042742978, now seen corresponding path program 1 times [2021-11-21 01:15:17,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:15:17,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637538558] [2021-11-21 01:15:17,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:15:17,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:15:17,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:15:17,777 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2021-11-21 01:15:17,777 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:15:17,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637538558] [2021-11-21 01:15:17,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637538558] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:15:17,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:15:17,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:15:17,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244756489] [2021-11-21 01:15:17,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:15:17,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:15:17,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:15:17,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:15:17,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:15:17,781 INFO L87 Difference]: Start difference. First operand 6532 states and 9400 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 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) [2021-11-21 01:15:21,107 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:15:22,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:15:22,194 INFO L93 Difference]: Finished difference Result 6545 states and 9409 transitions. [2021-11-21 01:15:22,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:15:22,196 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 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 163 [2021-11-21 01:15:22,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:15:22,254 INFO L225 Difference]: With dead ends: 6545 [2021-11-21 01:15:22,255 INFO L226 Difference]: Without dead ends: 6543 [2021-11-21 01:15:22,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:15:22,262 INFO L933 BasicCegarLoop]: 1694 mSDtfsCounter, 1265 mSDsluCounter, 5466 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1275 SdHoareTripleChecker+Valid, 6421 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:15:22,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1275 Valid, 6421 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1006 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2021-11-21 01:15:22,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6543 states. [2021-11-21 01:15:22,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6543 to 6536. [2021-11-21 01:15:22,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6536 states, 3779 states have (on average 1.3029902090500132) internal successors, (4924), 3964 states have internal predecessors, (4924), 2226 states have call successors, (2226), 534 states have call predecessors, (2226), 528 states have return successors, (2253), 2099 states have call predecessors, (2253), 2218 states have call successors, (2253) [2021-11-21 01:15:22,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 9403 transitions. [2021-11-21 01:15:22,658 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 9403 transitions. Word has length 163 [2021-11-21 01:15:22,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:15:22,659 INFO L470 AbstractCegarLoop]: Abstraction has 6536 states and 9403 transitions. [2021-11-21 01:15:22,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 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) [2021-11-21 01:15:22,661 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 9403 transitions. [2021-11-21 01:15:22,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-21 01:15:22,669 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:15:22,669 INFO L514 BasicCegarLoop]: trace histogram [13, 9, 9, 9, 9, 9, 9, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:15:22,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 01:15:22,670 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:15:22,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:15:22,671 INFO L85 PathProgramCache]: Analyzing trace with hash -655977125, now seen corresponding path program 1 times [2021-11-21 01:15:22,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:15:22,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415255021] [2021-11-21 01:15:22,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:15:22,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:15:22,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:15:22,904 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2021-11-21 01:15:22,904 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:15:22,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415255021] [2021-11-21 01:15:22,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415255021] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:15:22,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:15:22,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:15:22,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054295130] [2021-11-21 01:15:22,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:15:22,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:15:22,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:15:22,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:15:22,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:15:22,907 INFO L87 Difference]: Start difference. First operand 6536 states and 9403 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-21 01:15:26,146 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:15:27,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:15:27,177 INFO L93 Difference]: Finished difference Result 6549 states and 9412 transitions. [2021-11-21 01:15:27,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:15:27,179 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 169 [2021-11-21 01:15:27,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:15:27,246 INFO L225 Difference]: With dead ends: 6549 [2021-11-21 01:15:27,246 INFO L226 Difference]: Without dead ends: 6547 [2021-11-21 01:15:27,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:15:27,254 INFO L933 BasicCegarLoop]: 1694 mSDtfsCounter, 1265 mSDsluCounter, 5466 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1274 SdHoareTripleChecker+Valid, 6421 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:15:27,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1274 Valid, 6421 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1006 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2021-11-21 01:15:27,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6547 states. [2021-11-21 01:15:27,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6547 to 6540. [2021-11-21 01:15:27,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6540 states, 3782 states have (on average 1.3027498677948175) internal successors, (4927), 3967 states have internal predecessors, (4927), 2226 states have call successors, (2226), 535 states have call predecessors, (2226), 529 states have return successors, (2253), 2099 states have call predecessors, (2253), 2218 states have call successors, (2253) [2021-11-21 01:15:27,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6540 states to 6540 states and 9406 transitions. [2021-11-21 01:15:27,652 INFO L78 Accepts]: Start accepts. Automaton has 6540 states and 9406 transitions. Word has length 169 [2021-11-21 01:15:27,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:15:27,655 INFO L470 AbstractCegarLoop]: Abstraction has 6540 states and 9406 transitions. [2021-11-21 01:15:27,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-21 01:15:27,655 INFO L276 IsEmpty]: Start isEmpty. Operand 6540 states and 9406 transitions. [2021-11-21 01:15:27,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-21 01:15:27,663 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:15:27,663 INFO L514 BasicCegarLoop]: trace histogram [12, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:15:27,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 01:15:27,663 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:15:27,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:15:27,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1025455084, now seen corresponding path program 1 times [2021-11-21 01:15:27,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:15:27,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376644724] [2021-11-21 01:15:27,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:15:27,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:15:27,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:15:27,845 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 353 trivial. 0 not checked. [2021-11-21 01:15:27,845 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:15:27,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376644724] [2021-11-21 01:15:27,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376644724] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:15:27,846 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:15:27,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:15:27,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786105331] [2021-11-21 01:15:27,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:15:27,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:15:27,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:15:27,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:15:27,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:15:27,848 INFO L87 Difference]: Start difference. First operand 6540 states and 9406 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-21 01:15:30,984 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:15:31,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:15:31,500 INFO L93 Difference]: Finished difference Result 14262 states and 20500 transitions. [2021-11-21 01:15:31,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:15:31,500 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 165 [2021-11-21 01:15:31,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:15:31,542 INFO L225 Difference]: With dead ends: 14262 [2021-11-21 01:15:31,543 INFO L226 Difference]: Without dead ends: 7759 [2021-11-21 01:15:31,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:15:31,573 INFO L933 BasicCegarLoop]: 2001 mSDtfsCounter, 971 mSDsluCounter, 1579 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 16 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 971 SdHoareTripleChecker+Valid, 3348 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:15:31,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [971 Valid, 3348 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 669 Invalid, 1 Unknown, 0 Unchecked, 3.4s Time] [2021-11-21 01:15:31,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7759 states. [2021-11-21 01:15:31,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7759 to 7695. [2021-11-21 01:15:31,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7695 states, 4591 states have (on average 1.3014593770420388) internal successors, (5975), 4788 states have internal predecessors, (5975), 2481 states have call successors, (2481), 631 states have call predecessors, (2481), 620 states have return successors, (2500), 2336 states have call predecessors, (2500), 2473 states have call successors, (2500) [2021-11-21 01:15:31,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7695 states to 7695 states and 10956 transitions. [2021-11-21 01:15:31,965 INFO L78 Accepts]: Start accepts. Automaton has 7695 states and 10956 transitions. Word has length 165 [2021-11-21 01:15:31,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:15:31,966 INFO L470 AbstractCegarLoop]: Abstraction has 7695 states and 10956 transitions. [2021-11-21 01:15:31,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-21 01:15:31,967 INFO L276 IsEmpty]: Start isEmpty. Operand 7695 states and 10956 transitions. [2021-11-21 01:15:31,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-21 01:15:31,971 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:15:31,972 INFO L514 BasicCegarLoop]: trace histogram [13, 9, 9, 9, 9, 9, 9, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:15:31,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 01:15:31,972 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:15:31,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:15:31,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1266439834, now seen corresponding path program 1 times [2021-11-21 01:15:31,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:15:31,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656221620] [2021-11-21 01:15:31,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:15:31,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:15:32,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:15:32,218 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 419 trivial. 0 not checked. [2021-11-21 01:15:32,218 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:15:32,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656221620] [2021-11-21 01:15:32,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656221620] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:15:32,219 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:15:32,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:15:32,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340572270] [2021-11-21 01:15:32,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:15:32,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:15:32,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:15:32,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:15:32,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:15:32,221 INFO L87 Difference]: Start difference. First operand 7695 states and 10956 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 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) [2021-11-21 01:15:35,440 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:15:36,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:15:36,410 INFO L93 Difference]: Finished difference Result 7708 states and 10965 transitions. [2021-11-21 01:15:36,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:15:36,411 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 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 174 [2021-11-21 01:15:36,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:15:36,512 INFO L225 Difference]: With dead ends: 7708 [2021-11-21 01:15:36,512 INFO L226 Difference]: Without dead ends: 7706 [2021-11-21 01:15:36,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:15:36,516 INFO L933 BasicCegarLoop]: 1694 mSDtfsCounter, 1265 mSDsluCounter, 5466 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1273 SdHoareTripleChecker+Valid, 6421 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:15:36,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1273 Valid, 6421 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1006 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2021-11-21 01:15:36,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7706 states. [2021-11-21 01:15:36,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7706 to 7699. [2021-11-21 01:15:36,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7699 states, 4594 states have (on average 1.3012625163256422) internal successors, (5978), 4791 states have internal predecessors, (5978), 2481 states have call successors, (2481), 632 states have call predecessors, (2481), 621 states have return successors, (2500), 2336 states have call predecessors, (2500), 2473 states have call successors, (2500) [2021-11-21 01:15:36,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7699 states to 7699 states and 10959 transitions. [2021-11-21 01:15:36,882 INFO L78 Accepts]: Start accepts. Automaton has 7699 states and 10959 transitions. Word has length 174 [2021-11-21 01:15:36,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:15:36,883 INFO L470 AbstractCegarLoop]: Abstraction has 7699 states and 10959 transitions. [2021-11-21 01:15:36,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 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) [2021-11-21 01:15:36,883 INFO L276 IsEmpty]: Start isEmpty. Operand 7699 states and 10959 transitions. [2021-11-21 01:15:36,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-21 01:15:36,889 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:15:36,889 INFO L514 BasicCegarLoop]: trace histogram [13, 9, 9, 9, 9, 9, 9, 5, 5, 5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:15:36,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 01:15:36,889 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:15:36,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:15:36,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1439016183, now seen corresponding path program 1 times [2021-11-21 01:15:36,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:15:36,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054122111] [2021-11-21 01:15:36,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:15:36,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:15:36,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:15:37,072 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2021-11-21 01:15:37,072 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:15:37,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054122111] [2021-11-21 01:15:37,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054122111] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:15:37,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:15:37,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:15:37,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641395362] [2021-11-21 01:15:37,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:15:37,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:15:37,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:15:37,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:15:37,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:15:37,075 INFO L87 Difference]: Start difference. First operand 7699 states and 10959 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 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) [2021-11-21 01:15:40,203 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:15:41,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:15:41,135 INFO L93 Difference]: Finished difference Result 7712 states and 10968 transitions. [2021-11-21 01:15:41,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:15:41,137 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 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 178 [2021-11-21 01:15:41,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:15:41,174 INFO L225 Difference]: With dead ends: 7712 [2021-11-21 01:15:41,175 INFO L226 Difference]: Without dead ends: 7710 [2021-11-21 01:15:41,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:15:41,180 INFO L933 BasicCegarLoop]: 1694 mSDtfsCounter, 1265 mSDsluCounter, 5466 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1272 SdHoareTripleChecker+Valid, 6421 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:15:41,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1272 Valid, 6421 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1006 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2021-11-21 01:15:41,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7710 states. [2021-11-21 01:15:41,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7710 to 7703. [2021-11-21 01:15:41,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7703 states, 4597 states have (on average 1.3010659125516641) internal successors, (5981), 4794 states have internal predecessors, (5981), 2481 states have call successors, (2481), 633 states have call predecessors, (2481), 622 states have return successors, (2500), 2336 states have call predecessors, (2500), 2473 states have call successors, (2500) [2021-11-21 01:15:41,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7703 states to 7703 states and 10962 transitions. [2021-11-21 01:15:41,598 INFO L78 Accepts]: Start accepts. Automaton has 7703 states and 10962 transitions. Word has length 178 [2021-11-21 01:15:41,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:15:41,599 INFO L470 AbstractCegarLoop]: Abstraction has 7703 states and 10962 transitions. [2021-11-21 01:15:41,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 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) [2021-11-21 01:15:41,599 INFO L276 IsEmpty]: Start isEmpty. Operand 7703 states and 10962 transitions. [2021-11-21 01:15:41,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-21 01:15:41,605 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:15:41,606 INFO L514 BasicCegarLoop]: trace histogram [13, 9, 9, 9, 9, 9, 9, 6, 5, 5, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:15:41,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-21 01:15:41,606 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)] === [2021-11-21 01:15:41,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:15:41,607 INFO L85 PathProgramCache]: Analyzing trace with hash 227472122, now seen corresponding path program 1 times [2021-11-21 01:15:41,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:15:41,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869851336] [2021-11-21 01:15:41,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:15:41,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:15:41,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:15:41,785 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2021-11-21 01:15:41,785 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:15:41,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869851336] [2021-11-21 01:15:41,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869851336] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:15:41,786 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:15:41,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:15:41,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016597201] [2021-11-21 01:15:41,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:15:41,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:15:41,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:15:41,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:15:41,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:15:41,789 INFO L87 Difference]: Start difference. First operand 7703 states and 10962 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-21 01:15:45,010 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:15:45,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:15:45,862 INFO L93 Difference]: Finished difference Result 7716 states and 10971 transitions. [2021-11-21 01:15:45,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:15:45,863 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 184 [2021-11-21 01:15:45,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:15:45,896 INFO L225 Difference]: With dead ends: 7716 [2021-11-21 01:15:45,896 INFO L226 Difference]: Without dead ends: 7714 [2021-11-21 01:15:45,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:15:45,901 INFO L933 BasicCegarLoop]: 1694 mSDtfsCounter, 1265 mSDsluCounter, 5466 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1271 SdHoareTripleChecker+Valid, 6421 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:15:45,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1271 Valid, 6421 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1006 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2021-11-21 01:15:45,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7714 states. [2021-11-21 01:15:46,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7714 to 7707. [2021-11-21 01:15:46,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7707 states, 4600 states have (on average 1.3008695652173914) internal successors, (5984), 4797 states have internal predecessors, (5984), 2481 states have call successors, (2481), 634 states have call predecessors, (2481), 623 states have return successors, (2500), 2336 states have call predecessors, (2500), 2473 states have call successors, (2500) [2021-11-21 01:15:46,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7707 states to 7707 states and 10965 transitions. [2021-11-21 01:15:46,424 INFO L78 Accepts]: Start accepts. Automaton has 7707 states and 10965 transitions. Word has length 184 [2021-11-21 01:15:46,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:15:46,425 INFO L470 AbstractCegarLoop]: Abstraction has 7707 states and 10965 transitions. [2021-11-21 01:15:46,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-21 01:15:46,426 INFO L276 IsEmpty]: Start isEmpty. Operand 7707 states and 10965 transitions. [2021-11-21 01:15:46,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-21 01:15:46,432 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:15:46,433 INFO L514 BasicCegarLoop]: trace histogram [13, 9, 9, 9, 9, 9, 9, 7, 6, 6, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:15:46,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-21 01:15:46,433 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:15:46,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:15:46,434 INFO L85 PathProgramCache]: Analyzing trace with hash -2110788709, now seen corresponding path program 1 times [2021-11-21 01:15:46,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:15:46,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952334901] [2021-11-21 01:15:46,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:15:46,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:15:46,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:15:46,628 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 467 trivial. 0 not checked. [2021-11-21 01:15:46,628 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:15:46,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952334901] [2021-11-21 01:15:46,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952334901] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:15:46,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:15:46,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:15:46,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227951794] [2021-11-21 01:15:46,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:15:46,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:15:46,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:15:46,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:15:46,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:15:46,631 INFO L87 Difference]: Start difference. First operand 7707 states and 10965 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 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) [2021-11-21 01:15:50,782 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:15:52,811 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:15:53,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:15:53,204 INFO L93 Difference]: Finished difference Result 8107 states and 11371 transitions. [2021-11-21 01:15:53,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:15:53,205 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 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 189 [2021-11-21 01:15:53,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:15:53,243 INFO L225 Difference]: With dead ends: 8107 [2021-11-21 01:15:53,243 INFO L226 Difference]: Without dead ends: 8105 [2021-11-21 01:15:53,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:15:53,249 INFO L933 BasicCegarLoop]: 1429 mSDtfsCounter, 1349 mSDsluCounter, 3674 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1354 SdHoareTripleChecker+Valid, 4546 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:15:53,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1354 Valid, 4546 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 824 Invalid, 2 Unknown, 0 Unchecked, 6.4s Time] [2021-11-21 01:15:53,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8105 states. [2021-11-21 01:15:53,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8105 to 8105. [2021-11-21 01:15:53,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8105 states, 4813 states have (on average 1.290047787242884) internal successors, (6209), 5014 states have internal predecessors, (6209), 2570 states have call successors, (2570), 730 states have call predecessors, (2570), 719 states have return successors, (2589), 2425 states have call predecessors, (2589), 2562 states have call successors, (2589) [2021-11-21 01:15:53,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8105 states to 8105 states and 11368 transitions. [2021-11-21 01:15:53,711 INFO L78 Accepts]: Start accepts. Automaton has 8105 states and 11368 transitions. Word has length 189 [2021-11-21 01:15:53,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:15:53,712 INFO L470 AbstractCegarLoop]: Abstraction has 8105 states and 11368 transitions. [2021-11-21 01:15:53,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 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) [2021-11-21 01:15:53,712 INFO L276 IsEmpty]: Start isEmpty. Operand 8105 states and 11368 transitions. [2021-11-21 01:15:53,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-21 01:15:53,718 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:15:53,719 INFO L514 BasicCegarLoop]: trace histogram [13, 9, 9, 9, 9, 9, 9, 8, 7, 7, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:15:53,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-21 01:15:53,719 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:15:53,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:15:53,720 INFO L85 PathProgramCache]: Analyzing trace with hash 910378842, now seen corresponding path program 1 times [2021-11-21 01:15:53,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:15:53,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545429069] [2021-11-21 01:15:53,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:15:53,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:15:53,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:15:53,898 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 491 trivial. 0 not checked. [2021-11-21 01:15:53,898 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:15:53,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545429069] [2021-11-21 01:15:53,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545429069] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:15:53,899 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:15:53,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:15:53,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987910652] [2021-11-21 01:15:53,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:15:53,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:15:53,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:15:53,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:15:53,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:15:53,902 INFO L87 Difference]: Start difference. First operand 8105 states and 11368 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 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) [2021-11-21 01:15:56,835 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:15:57,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:15:57,652 INFO L93 Difference]: Finished difference Result 8118 states and 11377 transitions. [2021-11-21 01:15:57,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:15:57,653 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 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 194 [2021-11-21 01:15:57,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:15:57,689 INFO L225 Difference]: With dead ends: 8118 [2021-11-21 01:15:57,689 INFO L226 Difference]: Without dead ends: 8116 [2021-11-21 01:15:57,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:15:57,695 INFO L933 BasicCegarLoop]: 1694 mSDtfsCounter, 1265 mSDsluCounter, 5466 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1269 SdHoareTripleChecker+Valid, 6421 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:15:57,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1269 Valid, 6421 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1006 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2021-11-21 01:15:57,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8116 states. [2021-11-21 01:15:58,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8116 to 8109. [2021-11-21 01:15:58,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8109 states, 4816 states have (on average 1.2898671096345515) internal successors, (6212), 5017 states have internal predecessors, (6212), 2570 states have call successors, (2570), 731 states have call predecessors, (2570), 720 states have return successors, (2589), 2425 states have call predecessors, (2589), 2562 states have call successors, (2589) [2021-11-21 01:15:58,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8109 states to 8109 states and 11371 transitions. [2021-11-21 01:15:58,097 INFO L78 Accepts]: Start accepts. Automaton has 8109 states and 11371 transitions. Word has length 194 [2021-11-21 01:15:58,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:15:58,098 INFO L470 AbstractCegarLoop]: Abstraction has 8109 states and 11371 transitions. [2021-11-21 01:15:58,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 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) [2021-11-21 01:15:58,098 INFO L276 IsEmpty]: Start isEmpty. Operand 8109 states and 11371 transitions. [2021-11-21 01:15:58,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-11-21 01:15:58,105 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:15:58,105 INFO L514 BasicCegarLoop]: trace histogram [13, 9, 9, 9, 9, 9, 9, 9, 8, 8, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:15:58,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-21 01:15:58,106 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:15:58,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:15:58,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1672377655, now seen corresponding path program 1 times [2021-11-21 01:15:58,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:15:58,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223628917] [2021-11-21 01:15:58,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:15:58,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:15:58,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:15:58,312 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 518 trivial. 0 not checked. [2021-11-21 01:15:58,313 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:15:58,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223628917] [2021-11-21 01:15:58,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223628917] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:15:58,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:15:58,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:15:58,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111390369] [2021-11-21 01:15:58,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:15:58,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:15:58,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:15:58,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:15:58,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:15:58,316 INFO L87 Difference]: Start difference. First operand 8109 states and 11371 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-21 01:16:01,307 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:16:02,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:16:02,086 INFO L93 Difference]: Finished difference Result 8122 states and 11380 transitions. [2021-11-21 01:16:02,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:16:02,087 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 198 [2021-11-21 01:16:02,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:16:02,119 INFO L225 Difference]: With dead ends: 8122 [2021-11-21 01:16:02,119 INFO L226 Difference]: Without dead ends: 8120 [2021-11-21 01:16:02,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:16:02,125 INFO L933 BasicCegarLoop]: 1694 mSDtfsCounter, 1265 mSDsluCounter, 5466 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1268 SdHoareTripleChecker+Valid, 6421 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:16:02,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1268 Valid, 6421 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1006 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2021-11-21 01:16:02,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8120 states. [2021-11-21 01:16:02,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8120 to 8113. [2021-11-21 01:16:02,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8113 states, 4819 states have (on average 1.2896866569827765) internal successors, (6215), 5020 states have internal predecessors, (6215), 2570 states have call successors, (2570), 732 states have call predecessors, (2570), 721 states have return successors, (2589), 2425 states have call predecessors, (2589), 2562 states have call successors, (2589) [2021-11-21 01:16:02,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8113 states to 8113 states and 11374 transitions. [2021-11-21 01:16:02,530 INFO L78 Accepts]: Start accepts. Automaton has 8113 states and 11374 transitions. Word has length 198 [2021-11-21 01:16:02,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:16:02,531 INFO L470 AbstractCegarLoop]: Abstraction has 8113 states and 11374 transitions. [2021-11-21 01:16:02,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-21 01:16:02,531 INFO L276 IsEmpty]: Start isEmpty. Operand 8113 states and 11374 transitions. [2021-11-21 01:16:02,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-11-21 01:16:02,538 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:16:02,538 INFO L514 BasicCegarLoop]: trace histogram [13, 10, 9, 9, 9, 9, 9, 9, 9, 9, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:16:02,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-21 01:16:02,539 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:16:02,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:16:02,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1709215422, now seen corresponding path program 1 times [2021-11-21 01:16:02,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:16:02,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31583968] [2021-11-21 01:16:02,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:16:02,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:16:02,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:16:02,789 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2021-11-21 01:16:02,790 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:16:02,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31583968] [2021-11-21 01:16:02,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31583968] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:16:02,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:16:02,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:16:02,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105668525] [2021-11-21 01:16:02,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:16:02,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:16:02,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:16:02,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:16:02,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:16:02,792 INFO L87 Difference]: Start difference. First operand 8113 states and 11374 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-21 01:16:06,125 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:16:06,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:16:06,969 INFO L93 Difference]: Finished difference Result 8126 states and 11383 transitions. [2021-11-21 01:16:06,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:16:06,970 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 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 203 [2021-11-21 01:16:06,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:16:06,994 INFO L225 Difference]: With dead ends: 8126 [2021-11-21 01:16:06,994 INFO L226 Difference]: Without dead ends: 8124 [2021-11-21 01:16:06,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:16:06,999 INFO L933 BasicCegarLoop]: 1694 mSDtfsCounter, 1265 mSDsluCounter, 5466 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1267 SdHoareTripleChecker+Valid, 6421 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:16:06,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1267 Valid, 6421 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1006 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2021-11-21 01:16:07,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8124 states. [2021-11-21 01:16:07,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8124 to 8117. [2021-11-21 01:16:07,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8117 states, 4822 states have (on average 1.2895064288676898) internal successors, (6218), 5023 states have internal predecessors, (6218), 2570 states have call successors, (2570), 733 states have call predecessors, (2570), 722 states have return successors, (2589), 2425 states have call predecessors, (2589), 2562 states have call successors, (2589) [2021-11-21 01:16:07,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8117 states to 8117 states and 11377 transitions. [2021-11-21 01:16:07,419 INFO L78 Accepts]: Start accepts. Automaton has 8117 states and 11377 transitions. Word has length 203 [2021-11-21 01:16:07,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:16:07,420 INFO L470 AbstractCegarLoop]: Abstraction has 8117 states and 11377 transitions. [2021-11-21 01:16:07,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-21 01:16:07,420 INFO L276 IsEmpty]: Start isEmpty. Operand 8117 states and 11377 transitions. [2021-11-21 01:16:07,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-11-21 01:16:07,427 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:16:07,427 INFO L514 BasicCegarLoop]: trace histogram [13, 11, 10, 10, 9, 9, 9, 9, 9, 9, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:16:07,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-21 01:16:07,428 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:16:07,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:16:07,429 INFO L85 PathProgramCache]: Analyzing trace with hash 46031323, now seen corresponding path program 1 times [2021-11-21 01:16:07,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:16:07,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617751883] [2021-11-21 01:16:07,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:16:07,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:16:07,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:16:07,613 INFO L134 CoverageAnalysis]: Checked inductivity of 607 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 587 trivial. 0 not checked. [2021-11-21 01:16:07,613 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:16:07,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617751883] [2021-11-21 01:16:07,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617751883] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:16:07,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:16:07,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:16:07,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619238962] [2021-11-21 01:16:07,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:16:07,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:16:07,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:16:07,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:16:07,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:16:07,616 INFO L87 Difference]: Start difference. First operand 8117 states and 11377 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-21 01:16:10,912 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:16:11,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:16:11,898 INFO L93 Difference]: Finished difference Result 8130 states and 11386 transitions. [2021-11-21 01:16:11,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:16:11,900 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 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 209 [2021-11-21 01:16:11,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:16:11,925 INFO L225 Difference]: With dead ends: 8130 [2021-11-21 01:16:11,926 INFO L226 Difference]: Without dead ends: 8126 [2021-11-21 01:16:11,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:16:11,932 INFO L933 BasicCegarLoop]: 1694 mSDtfsCounter, 1265 mSDsluCounter, 5466 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1266 SdHoareTripleChecker+Valid, 6421 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:16:11,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1266 Valid, 6421 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1006 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2021-11-21 01:16:11,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8126 states. [2021-11-21 01:16:12,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8126 to 8119. [2021-11-21 01:16:12,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8119 states, 4824 states have (on average 1.289179104477612) internal successors, (6219), 5024 states have internal predecessors, (6219), 2570 states have call successors, (2570), 734 states have call predecessors, (2570), 722 states have return successors, (2589), 2425 states have call predecessors, (2589), 2562 states have call successors, (2589) [2021-11-21 01:16:12,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8119 states to 8119 states and 11378 transitions. [2021-11-21 01:16:12,429 INFO L78 Accepts]: Start accepts. Automaton has 8119 states and 11378 transitions. Word has length 209 [2021-11-21 01:16:12,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:16:12,430 INFO L470 AbstractCegarLoop]: Abstraction has 8119 states and 11378 transitions. [2021-11-21 01:16:12,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-21 01:16:12,431 INFO L276 IsEmpty]: Start isEmpty. Operand 8119 states and 11378 transitions. [2021-11-21 01:16:12,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-11-21 01:16:12,441 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:16:12,441 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 11, 11, 9, 9, 9, 9, 9, 9, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:16:12,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-21 01:16:12,442 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)] === [2021-11-21 01:16:12,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:16:12,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1476847590, now seen corresponding path program 1 times [2021-11-21 01:16:12,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:16:12,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462337917] [2021-11-21 01:16:12,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:16:12,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:16:12,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:16:12,617 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 627 trivial. 0 not checked. [2021-11-21 01:16:12,618 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:16:12,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462337917] [2021-11-21 01:16:12,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462337917] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:16:12,620 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:16:12,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:16:12,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381015864] [2021-11-21 01:16:12,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:16:12,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:16:12,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:16:12,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:16:12,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:16:12,622 INFO L87 Difference]: Start difference. First operand 8119 states and 11378 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-21 01:16:15,903 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:16:16,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:16:16,785 INFO L93 Difference]: Finished difference Result 8126 states and 11382 transitions. [2021-11-21 01:16:16,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:16:16,786 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 214 [2021-11-21 01:16:16,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:16:16,805 INFO L225 Difference]: With dead ends: 8126 [2021-11-21 01:16:16,805 INFO L226 Difference]: Without dead ends: 8031 [2021-11-21 01:16:16,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:16:16,810 INFO L933 BasicCegarLoop]: 1694 mSDtfsCounter, 1261 mSDsluCounter, 5468 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1261 SdHoareTripleChecker+Valid, 6423 SdHoareTripleChecker+Invalid, 1005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:16:16,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1261 Valid, 6423 Invalid, 1005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1002 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2021-11-21 01:16:16,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8031 states. [2021-11-21 01:16:17,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8031 to 8026. [2021-11-21 01:16:17,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8026 states, 4783 states have (on average 1.2891490696215764) internal successors, (6166), 4972 states have internal predecessors, (6166), 2531 states have call successors, (2531), 717 states have call predecessors, (2531), 709 states have return successors, (2554), 2401 states have call predecessors, (2554), 2527 states have call successors, (2554) [2021-11-21 01:16:17,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8026 states to 8026 states and 11251 transitions. [2021-11-21 01:16:17,214 INFO L78 Accepts]: Start accepts. Automaton has 8026 states and 11251 transitions. Word has length 214 [2021-11-21 01:16:17,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:16:17,214 INFO L470 AbstractCegarLoop]: Abstraction has 8026 states and 11251 transitions. [2021-11-21 01:16:17,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-21 01:16:17,215 INFO L276 IsEmpty]: Start isEmpty. Operand 8026 states and 11251 transitions. [2021-11-21 01:16:17,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-11-21 01:16:17,223 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:16:17,223 INFO L514 BasicCegarLoop]: trace histogram [15, 9, 9, 9, 9, 9, 9, 6, 6, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:16:17,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-21 01:16:17,223 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:16:17,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:16:17,224 INFO L85 PathProgramCache]: Analyzing trace with hash -342115517, now seen corresponding path program 1 times [2021-11-21 01:16:17,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:16:17,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062780271] [2021-11-21 01:16:17,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:16:17,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:16:17,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:16:17,389 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2021-11-21 01:16:17,390 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:16:17,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062780271] [2021-11-21 01:16:17,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062780271] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:16:17,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:16:17,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:16:17,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828329008] [2021-11-21 01:16:17,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:16:17,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:16:17,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:16:17,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:16:17,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:16:17,392 INFO L87 Difference]: Start difference. First operand 8026 states and 11251 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-21 01:16:21,142 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:16:21,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:16:21,665 INFO L93 Difference]: Finished difference Result 18514 states and 25959 transitions. [2021-11-21 01:16:21,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:16:21,665 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 214 [2021-11-21 01:16:21,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:16:21,692 INFO L225 Difference]: With dead ends: 18514 [2021-11-21 01:16:21,692 INFO L226 Difference]: Without dead ends: 10665 [2021-11-21 01:16:21,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:16:21,724 INFO L933 BasicCegarLoop]: 2167 mSDtfsCounter, 975 mSDsluCounter, 1578 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 975 SdHoareTripleChecker+Valid, 3512 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:16:21,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [975 Valid, 3512 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 706 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2021-11-21 01:16:21,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10665 states. [2021-11-21 01:16:22,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10665 to 10628. [2021-11-21 01:16:22,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10628 states, 6404 states have (on average 1.287008119925047) internal successors, (8242), 6640 states have internal predecessors, (8242), 3273 states have call successors, (3273), 960 states have call predecessors, (3273), 948 states have return successors, (3296), 3107 states have call predecessors, (3296), 3269 states have call successors, (3296) [2021-11-21 01:16:22,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10628 states to 10628 states and 14811 transitions. [2021-11-21 01:16:22,261 INFO L78 Accepts]: Start accepts. Automaton has 10628 states and 14811 transitions. Word has length 214 [2021-11-21 01:16:22,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:16:22,262 INFO L470 AbstractCegarLoop]: Abstraction has 10628 states and 14811 transitions. [2021-11-21 01:16:22,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-21 01:16:22,262 INFO L276 IsEmpty]: Start isEmpty. Operand 10628 states and 14811 transitions. [2021-11-21 01:16:22,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2021-11-21 01:16:22,276 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:16:22,277 INFO L514 BasicCegarLoop]: trace histogram [17, 10, 10, 9, 9, 9, 9, 9, 9, 4, 4, 4, 3, 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] [2021-11-21 01:16:22,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-21 01:16:22,277 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:16:22,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:16:22,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1881428913, now seen corresponding path program 1 times [2021-11-21 01:16:22,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:16:22,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258826693] [2021-11-21 01:16:22,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:16:22,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:16:22,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:16:22,592 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 663 trivial. 0 not checked. [2021-11-21 01:16:22,593 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:16:22,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258826693] [2021-11-21 01:16:22,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258826693] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:16:22,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:16:22,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:16:22,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942005445] [2021-11-21 01:16:22,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:16:22,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:16:22,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:16:22,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:16:22,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:16:22,595 INFO L87 Difference]: Start difference. First operand 10628 states and 14811 transitions. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-21 01:16:25,951 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:16:26,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:16:26,863 INFO L93 Difference]: Finished difference Result 16502 states and 23190 transitions. [2021-11-21 01:16:26,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:16:26,864 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 275 [2021-11-21 01:16:26,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:16:26,920 INFO L225 Difference]: With dead ends: 16502 [2021-11-21 01:16:26,920 INFO L226 Difference]: Without dead ends: 16500 [2021-11-21 01:16:26,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:16:26,928 INFO L933 BasicCegarLoop]: 1842 mSDtfsCounter, 1222 mSDsluCounter, 5866 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1223 SdHoareTripleChecker+Valid, 6878 SdHoareTripleChecker+Invalid, 1139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:16:26,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1223 Valid, 6878 Invalid, 1139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1136 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2021-11-21 01:16:26,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16500 states. [2021-11-21 01:16:27,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16500 to 16465. [2021-11-21 01:16:27,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16465 states, 9920 states have (on average 1.2956653225806452) internal successors, (12853), 10322 states have internal predecessors, (12853), 5119 states have call successors, (5119), 1460 states have call predecessors, (5119), 1423 states have return successors, (5161), 4795 states have call predecessors, (5161), 5115 states have call successors, (5161) [2021-11-21 01:16:27,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16465 states to 16465 states and 23133 transitions. [2021-11-21 01:16:27,611 INFO L78 Accepts]: Start accepts. Automaton has 16465 states and 23133 transitions. Word has length 275 [2021-11-21 01:16:27,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:16:27,611 INFO L470 AbstractCegarLoop]: Abstraction has 16465 states and 23133 transitions. [2021-11-21 01:16:27,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-21 01:16:27,612 INFO L276 IsEmpty]: Start isEmpty. Operand 16465 states and 23133 transitions. [2021-11-21 01:16:27,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2021-11-21 01:16:27,622 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:16:27,623 INFO L514 BasicCegarLoop]: trace histogram [17, 11, 11, 9, 9, 9, 9, 9, 9, 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] [2021-11-21 01:16:27,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-21 01:16:27,623 INFO L402 AbstractCegarLoop]: === Iteration 19 === 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)] === [2021-11-21 01:16:27,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:16:27,624 INFO L85 PathProgramCache]: Analyzing trace with hash -200589540, now seen corresponding path program 1 times [2021-11-21 01:16:27,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:16:27,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885182920] [2021-11-21 01:16:27,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:16:27,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:16:27,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:16:27,812 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 694 trivial. 0 not checked. [2021-11-21 01:16:27,812 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:16:27,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885182920] [2021-11-21 01:16:27,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885182920] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:16:27,813 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:16:27,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:16:27,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600680384] [2021-11-21 01:16:27,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:16:27,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:16:27,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:16:27,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:16:27,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:16:27,815 INFO L87 Difference]: Start difference. First operand 16465 states and 23133 transitions. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-21 01:16:30,967 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:16:31,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:16:31,629 INFO L93 Difference]: Finished difference Result 16465 states and 23133 transitions. [2021-11-21 01:16:31,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:16:31,630 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 296 [2021-11-21 01:16:31,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:16:31,681 INFO L225 Difference]: With dead ends: 16465 [2021-11-21 01:16:31,682 INFO L226 Difference]: Without dead ends: 16463 [2021-11-21 01:16:31,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:16:31,689 INFO L933 BasicCegarLoop]: 1444 mSDtfsCounter, 331 mSDsluCounter, 4835 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 5518 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:16:31,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 5518 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1042 Invalid, 1 Unknown, 0 Unchecked, 3.4s Time] [2021-11-21 01:16:31,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16463 states. [2021-11-21 01:16:32,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16463 to 16463. [2021-11-21 01:16:32,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16463 states, 9919 states have (on average 1.2944853311825788) internal successors, (12840), 10320 states have internal predecessors, (12840), 5119 states have call successors, (5119), 1460 states have call predecessors, (5119), 1423 states have return successors, (5161), 4795 states have call predecessors, (5161), 5115 states have call successors, (5161) [2021-11-21 01:16:32,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16463 states to 16463 states and 23120 transitions. [2021-11-21 01:16:32,298 INFO L78 Accepts]: Start accepts. Automaton has 16463 states and 23120 transitions. Word has length 296 [2021-11-21 01:16:32,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:16:32,299 INFO L470 AbstractCegarLoop]: Abstraction has 16463 states and 23120 transitions. [2021-11-21 01:16:32,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-21 01:16:32,299 INFO L276 IsEmpty]: Start isEmpty. Operand 16463 states and 23120 transitions. [2021-11-21 01:16:32,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2021-11-21 01:16:32,318 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:16:32,318 INFO L514 BasicCegarLoop]: trace histogram [21, 15, 15, 11, 11, 11, 11, 11, 11, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-21 01:16:32,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-21 01:16:32,319 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:16:32,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:16:32,319 INFO L85 PathProgramCache]: Analyzing trace with hash 896564391, now seen corresponding path program 1 times [2021-11-21 01:16:32,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:16:32,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040437694] [2021-11-21 01:16:32,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:16:32,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:16:32,430 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:16:32,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1350454431] [2021-11-21 01:16:32,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:16:32,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:16:32,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea50cad4-2586-4e50-931e-a677ef5f490e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:16:32,435 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea50cad4-2586-4e50-931e-a677ef5f490e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:16:32,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea50cad4-2586-4e50-931e-a677ef5f490e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:16:33,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:16:33,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 3976 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 01:16:33,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:16:34,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1144 backedges. 290 proven. 0 refuted. 0 times theorem prover too weak. 854 trivial. 0 not checked. [2021-11-21 01:16:34,386 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:16:34,386 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:16:34,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040437694] [2021-11-21 01:16:34,386 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:16:34,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350454431] [2021-11-21 01:16:34,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350454431] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:16:34,386 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:16:34,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:16:34,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104943959] [2021-11-21 01:16:34,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:16:34,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:16:34,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:16:34,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:16:34,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:16:34,389 INFO L87 Difference]: Start difference. First operand 16463 states and 23120 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 2 states have call successors, (60), 2 states have call predecessors, (60), 2 states have return successors, (58), 2 states have call predecessors, (58), 2 states have call successors, (58) [2021-11-21 01:16:37,581 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:16:38,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:16:38,243 INFO L93 Difference]: Finished difference Result 39798 states and 57272 transitions. [2021-11-21 01:16:38,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:16:38,244 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 2 states have call successors, (60), 2 states have call predecessors, (60), 2 states have return successors, (58), 2 states have call predecessors, (58), 2 states have call successors, (58) Word has length 404 [2021-11-21 01:16:38,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:16:38,319 INFO L225 Difference]: With dead ends: 39798 [2021-11-21 01:16:38,319 INFO L226 Difference]: Without dead ends: 23512 [2021-11-21 01:16:38,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 402 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:16:38,375 INFO L933 BasicCegarLoop]: 1964 mSDtfsCounter, 417 mSDsluCounter, 1744 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 3471 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:16:38,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [575 Valid, 3471 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 606 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2021-11-21 01:16:38,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23512 states. [2021-11-21 01:16:39,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23512 to 16473. [2021-11-21 01:16:39,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16473 states, 9929 states have (on average 1.294188740054386) internal successors, (12850), 10330 states have internal predecessors, (12850), 5119 states have call successors, (5119), 1460 states have call predecessors, (5119), 1423 states have return successors, (5161), 4795 states have call predecessors, (5161), 5115 states have call successors, (5161) [2021-11-21 01:16:39,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16473 states to 16473 states and 23130 transitions. [2021-11-21 01:16:39,179 INFO L78 Accepts]: Start accepts. Automaton has 16473 states and 23130 transitions. Word has length 404 [2021-11-21 01:16:39,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:16:39,181 INFO L470 AbstractCegarLoop]: Abstraction has 16473 states and 23130 transitions. [2021-11-21 01:16:39,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 2 states have call successors, (60), 2 states have call predecessors, (60), 2 states have return successors, (58), 2 states have call predecessors, (58), 2 states have call successors, (58) [2021-11-21 01:16:39,181 INFO L276 IsEmpty]: Start isEmpty. Operand 16473 states and 23130 transitions. [2021-11-21 01:16:39,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2021-11-21 01:16:39,202 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:16:39,203 INFO L514 BasicCegarLoop]: trace histogram [21, 15, 15, 11, 11, 11, 11, 11, 11, 6, 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, 2, 2, 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] [2021-11-21 01:16:39,250 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea50cad4-2586-4e50-931e-a677ef5f490e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-21 01:16:39,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea50cad4-2586-4e50-931e-a677ef5f490e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:16:39,431 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:16:39,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:16:39,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1995644795, now seen corresponding path program 1 times [2021-11-21 01:16:39,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:16:39,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525620197] [2021-11-21 01:16:39,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:16:39,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:16:39,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:16:39,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 1164 trivial. 0 not checked. [2021-11-21 01:16:39,731 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:16:39,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525620197] [2021-11-21 01:16:39,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525620197] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:16:39,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147611038] [2021-11-21 01:16:39,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:16:39,734 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:16:39,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea50cad4-2586-4e50-931e-a677ef5f490e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:16:39,739 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea50cad4-2586-4e50-931e-a677ef5f490e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:16:39,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea50cad4-2586-4e50-931e-a677ef5f490e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:16:41,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:16:41,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 4085 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:16:41,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:16:42,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 316 proven. 1 refuted. 0 times theorem prover too weak. 860 trivial. 0 not checked. [2021-11-21 01:16:42,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:16:43,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 1164 trivial. 0 not checked. [2021-11-21 01:16:43,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147611038] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:16:43,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [418428523] [2021-11-21 01:16:43,134 INFO L159 IcfgInterpreter]: Started Sifa with 211 locations of interest [2021-11-21 01:16:43,134 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:16:43,141 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:16:43,147 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:16:43,148 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs