./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-3com-3c59x.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152a5c82-6db8-4110-b215-850328e374e6/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152a5c82-6db8-4110-b215-850328e374e6/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152a5c82-6db8-4110-b215-850328e374e6/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152a5c82-6db8-4110-b215-850328e374e6/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-3com-3c59x.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152a5c82-6db8-4110-b215-850328e374e6/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152a5c82-6db8-4110-b215-850328e374e6/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash d46a0c21917156d86326b49faaf0b679a3e4aece26c641cfed6d2cba03552492 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:00:52,190 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:00:52,193 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:00:52,224 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:00:52,224 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:00:52,226 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:00:52,228 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:00:52,230 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:00:52,232 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:00:52,234 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:00:52,235 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:00:52,236 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:00:52,237 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:00:52,238 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:00:52,240 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:00:52,242 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:00:52,243 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:00:52,244 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:00:52,246 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:00:52,249 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:00:52,251 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:00:52,252 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:00:52,254 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:00:52,255 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:00:52,259 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:00:52,259 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:00:52,260 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:00:52,261 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:00:52,262 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:00:52,263 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:00:52,263 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:00:52,264 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:00:52,265 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:00:52,266 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:00:52,268 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:00:52,268 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:00:52,269 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:00:52,270 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:00:52,270 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:00:52,271 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:00:52,272 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:00:52,273 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152a5c82-6db8-4110-b215-850328e374e6/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 02:00:52,307 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:00:52,308 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:00:52,309 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:00:52,309 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:00:52,316 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:00:52,317 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:00:52,317 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:00:52,317 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:00:52,317 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:00:52,318 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:00:52,319 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:00:52,319 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:00:52,319 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:00:52,320 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:00:52,320 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:00:52,320 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:00:52,320 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:00:52,321 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:00:52,321 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:00:52,322 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:00:52,322 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:00:52,322 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:00:52,322 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:00:52,323 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:00:52,323 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:00:52,323 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:00:52,325 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:00:52,325 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:00:52,325 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:00:52,325 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:00:52,326 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:00:52,326 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:00:52,326 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:00:52,327 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:00:52,327 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:00:52,327 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:00:52,327 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:00:52,328 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:00:52,328 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152a5c82-6db8-4110-b215-850328e374e6/bin/utaipan-EQgc7hIp5V/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152a5c82-6db8-4110-b215-850328e374e6/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d46a0c21917156d86326b49faaf0b679a3e4aece26c641cfed6d2cba03552492 [2021-11-23 02:00:52,644 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:00:52,679 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:00:52,682 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:00:52,684 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:00:52,685 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:00:52,686 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152a5c82-6db8-4110-b215-850328e374e6/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-3com-3c59x.cil.i [2021-11-23 02:00:52,785 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152a5c82-6db8-4110-b215-850328e374e6/bin/utaipan-EQgc7hIp5V/data/e1dc555ee/0a4fe5e7ba2b4e9cb581b0191368d7b0/FLAG034b3017e [2021-11-23 02:00:54,003 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:00:54,004 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152a5c82-6db8-4110-b215-850328e374e6/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-3com-3c59x.cil.i [2021-11-23 02:00:54,081 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152a5c82-6db8-4110-b215-850328e374e6/bin/utaipan-EQgc7hIp5V/data/e1dc555ee/0a4fe5e7ba2b4e9cb581b0191368d7b0/FLAG034b3017e [2021-11-23 02:00:54,181 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152a5c82-6db8-4110-b215-850328e374e6/bin/utaipan-EQgc7hIp5V/data/e1dc555ee/0a4fe5e7ba2b4e9cb581b0191368d7b0 [2021-11-23 02:00:54,185 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:00:54,190 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:00:54,192 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:00:54,192 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:00:54,197 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:00:54,199 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:00:54" (1/1) ... [2021-11-23 02:00:54,202 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14012870 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:00:54, skipping insertion in model container [2021-11-23 02:00:54,203 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:00:54" (1/1) ... [2021-11-23 02:00:54,213 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:00:54,451 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:00:59,158 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_152a5c82-6db8-4110-b215-850328e374e6/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-3com-3c59x.cil.i[450587,450600] [2021-11-23 02:00:59,161 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_152a5c82-6db8-4110-b215-850328e374e6/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-3com-3c59x.cil.i[450756,450769] [2021-11-23 02:00:59,161 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_152a5c82-6db8-4110-b215-850328e374e6/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-3com-3c59x.cil.i[450923,450936] [2021-11-23 02:00:59,162 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_152a5c82-6db8-4110-b215-850328e374e6/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-3com-3c59x.cil.i[451091,451104] [2021-11-23 02:00:59,192 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:00:59,300 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:00:59,998 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_152a5c82-6db8-4110-b215-850328e374e6/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-3com-3c59x.cil.i[450587,450600] [2021-11-23 02:00:59,999 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_152a5c82-6db8-4110-b215-850328e374e6/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-3com-3c59x.cil.i[450756,450769] [2021-11-23 02:01:00,000 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_152a5c82-6db8-4110-b215-850328e374e6/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-3com-3c59x.cil.i[450923,450936] [2021-11-23 02:01:00,000 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_152a5c82-6db8-4110-b215-850328e374e6/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-3com-3c59x.cil.i[451091,451104] [2021-11-23 02:01:00,013 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:01:00,373 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:01:00,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:01:00 WrapperNode [2021-11-23 02:01:00,374 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:01:00,376 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:01:00,376 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:01:00,376 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:01:00,384 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:01:00" (1/1) ... [2021-11-23 02:01:00,557 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:01:00" (1/1) ... [2021-11-23 02:01:00,886 INFO L137 Inliner]: procedures = 547, calls = 4326, calls flagged for inlining = 248, calls inlined = 226, statements flattened = 8589 [2021-11-23 02:01:00,887 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:01:00,887 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:01:00,888 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:01:00,888 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:01:00,898 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:01:00" (1/1) ... [2021-11-23 02:01:00,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:01:00" (1/1) ... [2021-11-23 02:01:00,939 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:01:00" (1/1) ... [2021-11-23 02:01:00,940 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:01:00" (1/1) ... [2021-11-23 02:01:01,096 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:01:00" (1/1) ... [2021-11-23 02:01:01,129 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:01:00" (1/1) ... [2021-11-23 02:01:01,243 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:01:00" (1/1) ... [2021-11-23 02:01:01,288 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:01:01,290 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:01:01,290 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:01:01,290 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:01:01,291 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:01:00" (1/1) ... [2021-11-23 02:01:01,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:01:01,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152a5c82-6db8-4110-b215-850328e374e6/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:01:01,329 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152a5c82-6db8-4110-b215-850328e374e6/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:01:01,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152a5c82-6db8-4110-b215-850328e374e6/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:01:01,371 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2021-11-23 02:01:01,372 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2021-11-23 02:01:01,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-23 02:01:01,372 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-23 02:01:01,372 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_alloc_skb [2021-11-23 02:01:01,372 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_alloc_skb [2021-11-23 02:01:01,373 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_present [2021-11-23 02:01:01,373 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_present [2021-11-23 02:01:01,373 INFO L130 BoogieDeclarations]: Found specification of procedure vortex_nway_reset [2021-11-23 02:01:01,373 INFO L138 BoogieDeclarations]: Found implementation of procedure vortex_nway_reset [2021-11-23 02:01:01,373 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-23 02:01:01,373 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-23 02:01:01,374 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_87 [2021-11-23 02:01:01,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_87 [2021-11-23 02:01:01,374 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 02:01:01,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 02:01:01,374 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2021-11-23 02:01:01,375 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2021-11-23 02:01:01,375 INFO L130 BoogieDeclarations]: Found specification of procedure set_8021q_mode [2021-11-23 02:01:01,375 INFO L138 BoogieDeclarations]: Found implementation of procedure set_8021q_mode [2021-11-23 02:01:01,375 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irq_82 [2021-11-23 02:01:01,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irq_82 [2021-11-23 02:01:01,375 INFO L130 BoogieDeclarations]: Found specification of procedure vortex_remove_one [2021-11-23 02:01:01,376 INFO L138 BoogieDeclarations]: Found implementation of procedure vortex_remove_one [2021-11-23 02:01:01,376 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-23 02:01:01,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-23 02:01:01,376 INFO L130 BoogieDeclarations]: Found specification of procedure arch_local_irq_restore [2021-11-23 02:01:01,376 INFO L138 BoogieDeclarations]: Found implementation of procedure arch_local_irq_restore [2021-11-23 02:01:01,376 INFO L130 BoogieDeclarations]: Found specification of procedure issue_and_wait [2021-11-23 02:01:01,377 INFO L138 BoogieDeclarations]: Found implementation of procedure issue_and_wait [2021-11-23 02:01:01,377 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2021-11-23 02:01:01,377 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2021-11-23 02:01:01,377 INFO L130 BoogieDeclarations]: Found specification of procedure iowrite16 [2021-11-23 02:01:01,377 INFO L138 BoogieDeclarations]: Found implementation of procedure iowrite16 [2021-11-23 02:01:01,378 INFO L130 BoogieDeclarations]: Found specification of procedure iowrite8 [2021-11-23 02:01:01,378 INFO L138 BoogieDeclarations]: Found implementation of procedure iowrite8 [2021-11-23 02:01:01,378 INFO L130 BoogieDeclarations]: Found specification of procedure window_write32 [2021-11-23 02:01:01,378 INFO L138 BoogieDeclarations]: Found implementation of procedure window_write32 [2021-11-23 02:01:01,378 INFO L130 BoogieDeclarations]: Found specification of procedure ioread32 [2021-11-23 02:01:01,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ioread32 [2021-11-23 02:01:01,379 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_65 [2021-11-23 02:01:01,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_65 [2021-11-23 02:01:01,379 INFO L130 BoogieDeclarations]: Found specification of procedure pci_name [2021-11-23 02:01:01,379 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_name [2021-11-23 02:01:01,379 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_timer_timer_instance_5 [2021-11-23 02:01:01,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_timer_timer_instance_5 [2021-11-23 02:01:01,380 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-23 02:01:01,380 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-23 02:01:01,380 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_window_lock_of_vortex_private [2021-11-23 02:01:01,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_window_lock_of_vortex_private [2021-11-23 02:01:01,380 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_lock_of_vortex_private [2021-11-23 02:01:01,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_lock_of_vortex_private [2021-11-23 02:01:01,381 INFO L130 BoogieDeclarations]: Found specification of procedure window_set [2021-11-23 02:01:01,381 INFO L138 BoogieDeclarations]: Found implementation of procedure window_set [2021-11-23 02:01:01,381 INFO L130 BoogieDeclarations]: Found specification of procedure pci_get_drvdata [2021-11-23 02:01:01,381 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_get_drvdata [2021-11-23 02:01:01,381 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-23 02:01:01,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-23 02:01:01,382 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-11-23 02:01:01,382 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-11-23 02:01:01,382 INFO L130 BoogieDeclarations]: Found specification of procedure iowrite32 [2021-11-23 02:01:01,382 INFO L138 BoogieDeclarations]: Found implementation of procedure iowrite32 [2021-11-23 02:01:01,382 INFO L130 BoogieDeclarations]: Found specification of procedure skb_end_pointer [2021-11-23 02:01:01,383 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_end_pointer [2021-11-23 02:01:01,383 INFO L130 BoogieDeclarations]: Found specification of procedure netif_rx [2021-11-23 02:01:01,383 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_rx [2021-11-23 02:01:01,383 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-23 02:01:01,383 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-23 02:01:01,383 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-23 02:01:01,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-23 02:01:01,384 INFO L130 BoogieDeclarations]: Found specification of procedure arch_irqs_disabled_flags [2021-11-23 02:01:01,384 INFO L138 BoogieDeclarations]: Found implementation of procedure arch_irqs_disabled_flags [2021-11-23 02:01:01,384 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-23 02:01:01,384 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-23 02:01:01,384 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_timer_instance_callback_5_2 [2021-11-23 02:01:01,385 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_timer_instance_callback_5_2 [2021-11-23 02:01:01,385 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_single [2021-11-23 02:01:01,385 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_single [2021-11-23 02:01:01,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:01:01,385 INFO L130 BoogieDeclarations]: Found specification of procedure skb_tx_timestamp [2021-11-23 02:01:01,385 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_tx_timestamp [2021-11-23 02:01:01,386 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_del_timer_sync [2021-11-23 02:01:01,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_del_timer_sync [2021-11-23 02:01:01,386 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-23 02:01:01,386 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-23 02:01:01,386 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-11-23 02:01:01,386 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-11-23 02:01:01,387 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-23 02:01:01,387 INFO L130 BoogieDeclarations]: Found specification of procedure vortex_tx_timeout [2021-11-23 02:01:01,387 INFO L138 BoogieDeclarations]: Found implementation of procedure vortex_tx_timeout [2021-11-23 02:01:01,387 INFO L130 BoogieDeclarations]: Found specification of procedure pci_save_state [2021-11-23 02:01:01,387 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_save_state [2021-11-23 02:01:01,387 INFO L130 BoogieDeclarations]: Found specification of procedure ioport_map [2021-11-23 02:01:01,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ioport_map [2021-11-23 02:01:01,388 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-23 02:01:01,388 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-23 02:01:01,388 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_netdev [2021-11-23 02:01:01,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_netdev [2021-11-23 02:01:01,388 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-23 02:01:01,389 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-23 02:01:01,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-23 02:01:01,389 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-23 02:01:01,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-23 02:01:01,389 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:01:01,389 INFO L130 BoogieDeclarations]: Found specification of procedure vortex_interrupt [2021-11-23 02:01:01,390 INFO L138 BoogieDeclarations]: Found implementation of procedure vortex_interrupt [2021-11-23 02:01:01,390 INFO L130 BoogieDeclarations]: Found specification of procedure set_rx_mode [2021-11-23 02:01:01,390 INFO L138 BoogieDeclarations]: Found implementation of procedure set_rx_mode [2021-11-23 02:01:01,390 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2021-11-23 02:01:01,390 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2021-11-23 02:01:01,390 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-23 02:01:01,391 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-23 02:01:01,391 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_interrupt_context [2021-11-23 02:01:01,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_interrupt_context [2021-11-23 02:01:01,391 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2021-11-23 02:01:01,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2021-11-23 02:01:01,392 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2021-11-23 02:01:01,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2021-11-23 02:01:01,392 INFO L130 BoogieDeclarations]: Found specification of procedure vortex_set_duplex [2021-11-23 02:01:01,392 INFO L138 BoogieDeclarations]: Found implementation of procedure vortex_set_duplex [2021-11-23 02:01:01,392 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mod_timer_83 [2021-11-23 02:01:01,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mod_timer_83 [2021-11-23 02:01:01,393 INFO L130 BoogieDeclarations]: Found specification of procedure pci_iomap [2021-11-23 02:01:01,393 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_iomap [2021-11-23 02:01:01,393 INFO L130 BoogieDeclarations]: Found specification of procedure __netdev_alloc_skb [2021-11-23 02:01:01,393 INFO L138 BoogieDeclarations]: Found implementation of procedure __netdev_alloc_skb [2021-11-23 02:01:01,393 INFO L130 BoogieDeclarations]: Found specification of procedure pci_free_consistent [2021-11-23 02:01:01,393 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_free_consistent [2021-11-23 02:01:01,393 INFO L130 BoogieDeclarations]: Found specification of procedure vortex_error [2021-11-23 02:01:01,393 INFO L138 BoogieDeclarations]: Found implementation of procedure vortex_error [2021-11-23 02:01:01,394 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2021-11-23 02:01:01,394 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2021-11-23 02:01:01,394 INFO L130 BoogieDeclarations]: Found specification of procedure vortex_close [2021-11-23 02:01:01,394 INFO L138 BoogieDeclarations]: Found implementation of procedure vortex_close [2021-11-23 02:01:01,394 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-23 02:01:01,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-23 02:01:01,395 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:01:01,395 INFO L130 BoogieDeclarations]: Found specification of procedure arch_local_irq_save [2021-11-23 02:01:01,395 INFO L138 BoogieDeclarations]: Found implementation of procedure arch_local_irq_save [2021-11-23 02:01:01,395 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mod_timer [2021-11-23 02:01:01,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mod_timer [2021-11-23 02:01:01,395 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:01:01,395 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-23 02:01:01,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-23 02:01:01,396 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-23 02:01:01,396 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-23 02:01:01,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:01:01,396 INFO L130 BoogieDeclarations]: Found specification of procedure ioread16 [2021-11-23 02:01:01,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ioread16 [2021-11-23 02:01:01,396 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-23 02:01:01,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-23 02:01:01,397 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2021-11-23 02:01:01,397 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2021-11-23 02:01:01,397 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-23 02:01:01,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-23 02:01:01,397 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mod_timer_98 [2021-11-23 02:01:01,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mod_timer_98 [2021-11-23 02:01:01,398 INFO L130 BoogieDeclarations]: Found specification of procedure acpi_set_WOL [2021-11-23 02:01:01,398 INFO L138 BoogieDeclarations]: Found implementation of procedure acpi_set_WOL [2021-11-23 02:01:01,398 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2021-11-23 02:01:01,398 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2021-11-23 02:01:01,398 INFO L130 BoogieDeclarations]: Found specification of procedure window_write16 [2021-11-23 02:01:01,398 INFO L138 BoogieDeclarations]: Found implementation of procedure window_write16 [2021-11-23 02:01:01,399 INFO L130 BoogieDeclarations]: Found specification of procedure ioread8 [2021-11-23 02:01:01,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ioread8 [2021-11-23 02:01:01,399 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~TO~VOID [2021-11-23 02:01:01,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~TO~VOID [2021-11-23 02:01:01,399 INFO L130 BoogieDeclarations]: Found specification of procedure window_read8 [2021-11-23 02:01:01,399 INFO L138 BoogieDeclarations]: Found implementation of procedure window_read8 [2021-11-23 02:01:01,399 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_spin_lock [2021-11-23 02:01:01,399 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_spin_lock [2021-11-23 02:01:01,400 INFO L130 BoogieDeclarations]: Found specification of procedure update_stats [2021-11-23 02:01:01,400 INFO L138 BoogieDeclarations]: Found implementation of procedure update_stats [2021-11-23 02:01:01,400 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-23 02:01:01,400 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-23 02:01:01,400 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2021-11-23 02:01:01,400 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2021-11-23 02:01:01,400 INFO L130 BoogieDeclarations]: Found specification of procedure poll_vortex [2021-11-23 02:01:01,401 INFO L138 BoogieDeclarations]: Found implementation of procedure poll_vortex [2021-11-23 02:01:01,401 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2021-11-23 02:01:01,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2021-11-23 02:01:01,401 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_window_lock_of_vortex_private [2021-11-23 02:01:01,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_window_lock_of_vortex_private [2021-11-23 02:01:01,401 INFO L130 BoogieDeclarations]: Found specification of procedure vortex_check_media [2021-11-23 02:01:01,401 INFO L138 BoogieDeclarations]: Found implementation of procedure vortex_check_media [2021-11-23 02:01:01,402 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~TO~VOID [2021-11-23 02:01:01,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~TO~VOID [2021-11-23 02:01:01,402 INFO L130 BoogieDeclarations]: Found specification of procedure dev_name [2021-11-23 02:01:01,402 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_name [2021-11-23 02:01:01,402 INFO L130 BoogieDeclarations]: Found specification of procedure boomerang_rx [2021-11-23 02:01:01,402 INFO L138 BoogieDeclarations]: Found implementation of procedure boomerang_rx [2021-11-23 02:01:01,403 INFO L130 BoogieDeclarations]: Found specification of procedure arch_local_save_flags [2021-11-23 02:01:01,403 INFO L138 BoogieDeclarations]: Found implementation of procedure arch_local_save_flags [2021-11-23 02:01:01,403 INFO L130 BoogieDeclarations]: Found specification of procedure vortex_open [2021-11-23 02:01:01,403 INFO L138 BoogieDeclarations]: Found implementation of procedure vortex_open [2021-11-23 02:01:01,403 INFO L130 BoogieDeclarations]: Found specification of procedure dump_tx_ring [2021-11-23 02:01:01,403 INFO L138 BoogieDeclarations]: Found implementation of procedure dump_tx_ring [2021-11-23 02:01:01,403 INFO L130 BoogieDeclarations]: Found specification of procedure mdio_read [2021-11-23 02:01:01,404 INFO L138 BoogieDeclarations]: Found implementation of procedure mdio_read [2021-11-23 02:01:01,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:01:01,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:01:01,404 INFO L130 BoogieDeclarations]: Found specification of procedure vortex_probe1 [2021-11-23 02:01:01,404 INFO L138 BoogieDeclarations]: Found implementation of procedure vortex_probe1 [2021-11-23 02:01:01,404 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-23 02:01:01,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 02:01:01,405 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-23 02:01:01,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-23 02:01:01,405 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-23 02:01:01,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-23 02:01:01,405 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_process_context [2021-11-23 02:01:01,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_process_context [2021-11-23 02:01:01,405 INFO L130 BoogieDeclarations]: Found specification of procedure trace_hardirqs_on [2021-11-23 02:01:01,406 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_hardirqs_on [2021-11-23 02:01:01,406 INFO L130 BoogieDeclarations]: Found specification of procedure pci_map_single [2021-11-23 02:01:01,406 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_map_single [2021-11-23 02:01:01,406 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-23 02:01:01,406 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-23 02:01:01,406 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_post_probe [2021-11-23 02:01:01,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_post_probe [2021-11-23 02:01:01,406 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2021-11-23 02:01:01,407 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2021-11-23 02:01:01,407 INFO L130 BoogieDeclarations]: Found specification of procedure netif_start_queue [2021-11-23 02:01:01,407 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_start_queue [2021-11-23 02:01:01,407 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:01:01,407 INFO L130 BoogieDeclarations]: Found specification of procedure trace_hardirqs_off [2021-11-23 02:01:01,407 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_hardirqs_off [2021-11-23 02:01:01,407 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-11-23 02:01:01,408 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-11-23 02:01:01,408 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:01:01,408 INFO L130 BoogieDeclarations]: Found specification of procedure vortex_suspend [2021-11-23 02:01:01,408 INFO L138 BoogieDeclarations]: Found implementation of procedure vortex_suspend [2021-11-23 02:01:01,408 INFO L130 BoogieDeclarations]: Found specification of procedure boomerang_interrupt [2021-11-23 02:01:01,408 INFO L138 BoogieDeclarations]: Found implementation of procedure boomerang_interrupt [2021-11-23 02:01:01,408 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_irq_81 [2021-11-23 02:01:01,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_irq_81 [2021-11-23 02:01:01,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 02:01:01,409 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~structbegin~int~structend~~TO~int [2021-11-23 02:01:01,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~structbegin~int~structend~~TO~int [2021-11-23 02:01:01,409 INFO L130 BoogieDeclarations]: Found specification of procedure rx_oom_timer [2021-11-23 02:01:01,409 INFO L138 BoogieDeclarations]: Found implementation of procedure rx_oom_timer [2021-11-23 02:01:01,409 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_pre_probe [2021-11-23 02:01:01,410 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_pre_probe [2021-11-23 02:01:01,410 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-23 02:01:01,410 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-23 02:01:01,410 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-23 02:01:01,410 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-23 02:01:01,410 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_irq [2021-11-23 02:01:01,410 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_irq [2021-11-23 02:01:01,411 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_bh_108 [2021-11-23 02:01:01,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_bh_108 [2021-11-23 02:01:01,411 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_irq [2021-11-23 02:01:01,411 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_irq [2021-11-23 02:01:01,411 INFO L130 BoogieDeclarations]: Found specification of procedure mdio_sync [2021-11-23 02:01:01,411 INFO L138 BoogieDeclarations]: Found implementation of procedure mdio_sync [2021-11-23 02:01:01,412 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_89 [2021-11-23 02:01:01,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_89 [2021-11-23 02:01:01,412 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_88 [2021-11-23 02:01:01,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_88 [2021-11-23 02:01:01,412 INFO L130 BoogieDeclarations]: Found specification of procedure vortex_resume [2021-11-23 02:01:01,412 INFO L138 BoogieDeclarations]: Found implementation of procedure vortex_resume [2021-11-23 02:01:01,412 INFO L130 BoogieDeclarations]: Found specification of procedure pci_restore_state [2021-11-23 02:01:01,413 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_restore_state [2021-11-23 02:01:01,413 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reserve [2021-11-23 02:01:01,413 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reserve [2021-11-23 02:01:01,413 INFO L130 BoogieDeclarations]: Found specification of procedure vortex_rx [2021-11-23 02:01:01,413 INFO L138 BoogieDeclarations]: Found implementation of procedure vortex_rx [2021-11-23 02:01:01,413 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-11-23 02:01:01,413 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-11-23 02:01:01,414 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-23 02:01:01,414 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-23 02:01:01,414 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer_sync [2021-11-23 02:01:01,414 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer_sync [2021-11-23 02:01:01,414 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-23 02:01:01,414 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-23 02:01:01,414 INFO L130 BoogieDeclarations]: Found specification of procedure mdio_delay [2021-11-23 02:01:01,414 INFO L138 BoogieDeclarations]: Found implementation of procedure mdio_delay [2021-11-23 02:01:01,415 INFO L130 BoogieDeclarations]: Found specification of procedure vortex_timer [2021-11-23 02:01:01,415 INFO L138 BoogieDeclarations]: Found implementation of procedure vortex_timer [2021-11-23 02:01:01,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:01:01,415 INFO L130 BoogieDeclarations]: Found specification of procedure vortex_down [2021-11-23 02:01:01,415 INFO L138 BoogieDeclarations]: Found implementation of procedure vortex_down [2021-11-23 02:01:01,415 INFO L130 BoogieDeclarations]: Found specification of procedure eth_type_trans [2021-11-23 02:01:01,415 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_type_trans [2021-11-23 02:01:01,416 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2021-11-23 02:01:01,416 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2021-11-23 02:01:01,416 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-23 02:01:01,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-23 02:01:01,416 INFO L130 BoogieDeclarations]: Found specification of procedure window_write8 [2021-11-23 02:01:01,416 INFO L138 BoogieDeclarations]: Found implementation of procedure window_write8 [2021-11-23 02:01:01,416 INFO L130 BoogieDeclarations]: Found specification of procedure window_read32 [2021-11-23 02:01:01,417 INFO L138 BoogieDeclarations]: Found implementation of procedure window_read32 [2021-11-23 02:01:01,417 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dispatch_instance_register_10_2 [2021-11-23 02:01:01,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dispatch_instance_register_10_2 [2021-11-23 02:01:01,417 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~$Pointer$~TO~int [2021-11-23 02:01:01,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~$Pointer$~TO~int [2021-11-23 02:01:01,417 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_bh_109 [2021-11-23 02:01:01,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_bh_109 [2021-11-23 02:01:01,418 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_94 [2021-11-23 02:01:01,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_94 [2021-11-23 02:01:01,418 INFO L130 BoogieDeclarations]: Found specification of procedure ioread32_rep [2021-11-23 02:01:01,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ioread32_rep [2021-11-23 02:01:01,418 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_90 [2021-11-23 02:01:01,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_90 [2021-11-23 02:01:01,418 INFO L130 BoogieDeclarations]: Found specification of procedure pci_enable_device [2021-11-23 02:01:01,419 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_enable_device [2021-11-23 02:01:01,419 INFO L130 BoogieDeclarations]: Found specification of procedure vortex_up [2021-11-23 02:01:01,419 INFO L138 BoogieDeclarations]: Found implementation of procedure vortex_up [2021-11-23 02:01:01,419 INFO L130 BoogieDeclarations]: Found specification of procedure window_read16 [2021-11-23 02:01:01,419 INFO L138 BoogieDeclarations]: Found implementation of procedure window_read16 [2021-11-23 02:01:01,419 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-23 02:01:01,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-23 02:01:01,420 INFO L130 BoogieDeclarations]: Found specification of procedure init_timer_key [2021-11-23 02:01:01,420 INFO L138 BoogieDeclarations]: Found implementation of procedure init_timer_key [2021-11-23 02:01:01,420 INFO L130 BoogieDeclarations]: Found specification of procedure pci_iounmap [2021-11-23 02:01:01,420 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_iounmap [2021-11-23 02:01:01,420 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_power_state [2021-11-23 02:01:01,420 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_power_state [2021-11-23 02:01:01,421 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_lock_of_vortex_private [2021-11-23 02:01:01,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_lock_of_vortex_private [2021-11-23 02:01:01,421 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-11-23 02:01:01,421 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-11-23 02:01:01,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:01:01,421 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-23 02:01:01,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-23 02:01:01,422 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_netdev [2021-11-23 02:01:01,422 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_netdev [2021-11-23 02:01:02,618 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:01:02,625 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:01:04,782 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-23 02:01:11,201 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:01:14,011 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:01:14,011 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 02:01:14,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:01:14 BoogieIcfgContainer [2021-11-23 02:01:14,020 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:01:14,024 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:01:14,024 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:01:14,029 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:01:14,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:00:54" (1/3) ... [2021-11-23 02:01:14,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ccbec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:01:14, skipping insertion in model container [2021-11-23 02:01:14,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:01:00" (2/3) ... [2021-11-23 02:01:14,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ccbec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:01:14, skipping insertion in model container [2021-11-23 02:01:14,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:01:14" (3/3) ... [2021-11-23 02:01:14,032 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-3com-3c59x.cil.i [2021-11-23 02:01:14,039 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:01:14,039 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-23 02:01:14,123 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:01:14,143 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:01:14,143 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-23 02:01:14,233 INFO L276 IsEmpty]: Start isEmpty. Operand has 2097 states, 1181 states have (on average 1.3022861981371718) internal successors, (1538), 1269 states have internal predecessors, (1538), 758 states have call successors, (758), 155 states have call predecessors, (758), 154 states have return successors, (751), 733 states have call predecessors, (751), 751 states have call successors, (751) [2021-11-23 02:01:14,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-23 02:01:14,245 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:01:14,246 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-23 02:01:14,246 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:01:14,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:01:14,252 INFO L85 PathProgramCache]: Analyzing trace with hash -12733041, now seen corresponding path program 1 times [2021-11-23 02:01:14,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:01:14,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670403344] [2021-11-23 02:01:14,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:01:14,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:01:14,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:01:15,324 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 02:01:15,325 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:01:15,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670403344] [2021-11-23 02:01:15,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670403344] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:01:15,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:01:15,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:01:15,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472565947] [2021-11-23 02:01:15,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:01:15,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:01:15,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:01:15,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:01:15,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:01:15,403 INFO L87 Difference]: Start difference. First operand has 2097 states, 1181 states have (on average 1.3022861981371718) internal successors, (1538), 1269 states have internal predecessors, (1538), 758 states have call successors, (758), 155 states have call predecessors, (758), 154 states have return successors, (751), 733 states have call predecessors, (751), 751 states have call successors, (751) Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 02:01:17,828 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:01:20,154 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:01:26,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:01:26,525 INFO L93 Difference]: Finished difference Result 5502 states and 8304 transitions. [2021-11-23 02:01:26,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:01:26,530 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 37 [2021-11-23 02:01:26,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:01:26,593 INFO L225 Difference]: With dead ends: 5502 [2021-11-23 02:01:26,594 INFO L226 Difference]: Without dead ends: 3411 [2021-11-23 02:01:26,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:01:26,638 INFO L933 BasicCegarLoop]: 3273 mSDtfsCounter, 2520 mSDsluCounter, 9681 mSDsCounter, 0 mSdLazyCounter, 1486 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2536 SdHoareTripleChecker+Valid, 11882 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1486 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:01:26,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2536 Valid, 11882 Invalid, 1489 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 1486 Invalid, 2 Unknown, 0 Unchecked, 10.5s Time] [2021-11-23 02:01:26,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3411 states. [2021-11-23 02:01:27,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3411 to 3404. [2021-11-23 02:01:27,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3404 states, 1900 states have (on average 1.2857894736842106) internal successors, (2443), 2036 states have internal predecessors, (2443), 1222 states have call successors, (1222), 280 states have call predecessors, (1222), 279 states have return successors, (1219), 1191 states have call predecessors, (1219), 1219 states have call successors, (1219) [2021-11-23 02:01:27,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3404 states to 3404 states and 4884 transitions. [2021-11-23 02:01:27,090 INFO L78 Accepts]: Start accepts. Automaton has 3404 states and 4884 transitions. Word has length 37 [2021-11-23 02:01:27,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:01:27,091 INFO L470 AbstractCegarLoop]: Abstraction has 3404 states and 4884 transitions. [2021-11-23 02:01:27,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 02:01:27,092 INFO L276 IsEmpty]: Start isEmpty. Operand 3404 states and 4884 transitions. [2021-11-23 02:01:27,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-23 02:01:27,101 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:01:27,101 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 02:01:27,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:01:27,102 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:01:27,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:01:27,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1118368096, now seen corresponding path program 1 times [2021-11-23 02:01:27,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:01:27,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823761350] [2021-11-23 02:01:27,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:01:27,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:01:27,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:01:27,558 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 02:01:27,559 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:01:27,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823761350] [2021-11-23 02:01:27,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823761350] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:01:27,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:01:27,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:01:27,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994448747] [2021-11-23 02:01:27,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:01:27,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:01:27,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:01:27,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:01:27,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:01:27,568 INFO L87 Difference]: Start difference. First operand 3404 states and 4884 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:01:29,812 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:01:31,258 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:01:33,274 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:01:35,298 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:01:42,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:01:42,264 INFO L93 Difference]: Finished difference Result 3417 states and 4895 transitions. [2021-11-23 02:01:42,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:01:42,268 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2021-11-23 02:01:42,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:01:42,306 INFO L225 Difference]: With dead ends: 3417 [2021-11-23 02:01:42,306 INFO L226 Difference]: Without dead ends: 3415 [2021-11-23 02:01:42,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:01:42,311 INFO L933 BasicCegarLoop]: 3257 mSDtfsCounter, 2499 mSDsluCounter, 9641 mSDsCounter, 0 mSdLazyCounter, 1488 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2513 SdHoareTripleChecker+Valid, 11823 SdHoareTripleChecker+Invalid, 1492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1488 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:01:42,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2513 Valid, 11823 Invalid, 1492 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 1488 Invalid, 3 Unknown, 0 Unchecked, 14.3s Time] [2021-11-23 02:01:42,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3415 states. [2021-11-23 02:01:42,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3415 to 3408. [2021-11-23 02:01:42,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3408 states, 1903 states have (on average 1.2853389385181293) internal successors, (2446), 2039 states have internal predecessors, (2446), 1222 states have call successors, (1222), 281 states have call predecessors, (1222), 280 states have return successors, (1219), 1191 states have call predecessors, (1219), 1219 states have call successors, (1219) [2021-11-23 02:01:42,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3408 states to 3408 states and 4887 transitions. [2021-11-23 02:01:42,640 INFO L78 Accepts]: Start accepts. Automaton has 3408 states and 4887 transitions. Word has length 42 [2021-11-23 02:01:42,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:01:42,641 INFO L470 AbstractCegarLoop]: Abstraction has 3408 states and 4887 transitions. [2021-11-23 02:01:42,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:01:42,641 INFO L276 IsEmpty]: Start isEmpty. Operand 3408 states and 4887 transitions. [2021-11-23 02:01:42,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-23 02:01:42,648 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:01:42,649 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:01:42,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:01:42,649 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:01:42,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:01:42,650 INFO L85 PathProgramCache]: Analyzing trace with hash 2093778927, now seen corresponding path program 1 times [2021-11-23 02:01:42,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:01:42,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256295267] [2021-11-23 02:01:42,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:01:42,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:01:42,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:01:43,067 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 02:01:43,067 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:01:43,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256295267] [2021-11-23 02:01:43,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256295267] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:01:43,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:01:43,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:01:43,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581882607] [2021-11-23 02:01:43,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:01:43,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:01:43,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:01:43,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:01:43,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:01:43,074 INFO L87 Difference]: Start difference. First operand 3408 states and 4887 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:01:45,318 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:01:47,173 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:01:49,191 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:01:50,592 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:01:52,610 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:01:58,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:01:58,258 INFO L93 Difference]: Finished difference Result 3421 states and 4898 transitions. [2021-11-23 02:01:58,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:01:58,261 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 47 [2021-11-23 02:01:58,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:01:58,295 INFO L225 Difference]: With dead ends: 3421 [2021-11-23 02:01:58,295 INFO L226 Difference]: Without dead ends: 3419 [2021-11-23 02:01:58,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:01:58,300 INFO L933 BasicCegarLoop]: 3257 mSDtfsCounter, 2499 mSDsluCounter, 9641 mSDsCounter, 0 mSdLazyCounter, 1488 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2512 SdHoareTripleChecker+Valid, 11823 SdHoareTripleChecker+Invalid, 1492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1488 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:01:58,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2512 Valid, 11823 Invalid, 1492 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 1488 Invalid, 3 Unknown, 0 Unchecked, 14.9s Time] [2021-11-23 02:01:58,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3419 states. [2021-11-23 02:01:58,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3419 to 3412. [2021-11-23 02:01:58,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3412 states, 1906 states have (on average 1.2848898216159497) internal successors, (2449), 2042 states have internal predecessors, (2449), 1222 states have call successors, (1222), 282 states have call predecessors, (1222), 281 states have return successors, (1219), 1191 states have call predecessors, (1219), 1219 states have call successors, (1219) [2021-11-23 02:01:58,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3412 states to 3412 states and 4890 transitions. [2021-11-23 02:01:58,562 INFO L78 Accepts]: Start accepts. Automaton has 3412 states and 4890 transitions. Word has length 47 [2021-11-23 02:01:58,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:01:58,563 INFO L470 AbstractCegarLoop]: Abstraction has 3412 states and 4890 transitions. [2021-11-23 02:01:58,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:01:58,564 INFO L276 IsEmpty]: Start isEmpty. Operand 3412 states and 4890 transitions. [2021-11-23 02:01:58,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-23 02:01:58,566 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:01:58,566 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:01:58,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:01:58,567 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)] === [2021-11-23 02:01:58,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:01:58,568 INFO L85 PathProgramCache]: Analyzing trace with hash -949158533, now seen corresponding path program 1 times [2021-11-23 02:01:58,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:01:58,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898002706] [2021-11-23 02:01:58,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:01:58,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:01:58,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:01:59,088 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-23 02:01:59,089 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:01:59,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898002706] [2021-11-23 02:01:59,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898002706] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:01:59,089 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:01:59,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:01:59,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279477286] [2021-11-23 02:01:59,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:01:59,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:01:59,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:01:59,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:01:59,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:01:59,092 INFO L87 Difference]: Start difference. First operand 3412 states and 4890 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-23 02:02:01,330 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:02:03,675 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:02:08,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:02:08,590 INFO L93 Difference]: Finished difference Result 3425 states and 4901 transitions. [2021-11-23 02:02:08,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:02:08,593 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2021-11-23 02:02:08,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:02:08,627 INFO L225 Difference]: With dead ends: 3425 [2021-11-23 02:02:08,628 INFO L226 Difference]: Without dead ends: 3423 [2021-11-23 02:02:08,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:02:08,632 INFO L933 BasicCegarLoop]: 3257 mSDtfsCounter, 2493 mSDsluCounter, 9638 mSDsCounter, 0 mSdLazyCounter, 1486 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2505 SdHoareTripleChecker+Valid, 11823 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1486 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:02:08,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2505 Valid, 11823 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1486 Invalid, 2 Unknown, 0 Unchecked, 9.3s Time] [2021-11-23 02:02:08,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3423 states. [2021-11-23 02:02:08,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3423 to 3416. [2021-11-23 02:02:08,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3416 states, 1909 states have (on average 1.284442116291252) internal successors, (2452), 2045 states have internal predecessors, (2452), 1222 states have call successors, (1222), 283 states have call predecessors, (1222), 282 states have return successors, (1219), 1191 states have call predecessors, (1219), 1219 states have call successors, (1219) [2021-11-23 02:02:08,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3416 states to 3416 states and 4893 transitions. [2021-11-23 02:02:08,888 INFO L78 Accepts]: Start accepts. Automaton has 3416 states and 4893 transitions. Word has length 60 [2021-11-23 02:02:08,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:02:08,889 INFO L470 AbstractCegarLoop]: Abstraction has 3416 states and 4893 transitions. [2021-11-23 02:02:08,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-23 02:02:08,890 INFO L276 IsEmpty]: Start isEmpty. Operand 3416 states and 4893 transitions. [2021-11-23 02:02:08,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-23 02:02:08,893 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:02:08,893 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:02:08,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:02:08,894 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:02:08,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:02:08,894 INFO L85 PathProgramCache]: Analyzing trace with hash -84081612, now seen corresponding path program 1 times [2021-11-23 02:02:08,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:02:08,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375288049] [2021-11-23 02:02:08,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:08,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:02:09,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:09,335 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-23 02:02:09,336 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:02:09,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375288049] [2021-11-23 02:02:09,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375288049] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:02:09,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:02:09,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:02:09,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001139627] [2021-11-23 02:02:09,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:02:09,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:02:09,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:02:09,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:02:09,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:02:09,342 INFO L87 Difference]: Start difference. First operand 3416 states and 4893 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-23 02:02:11,613 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:02:13,444 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:02:15,847 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:02:17,496 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:02:23,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:02:23,033 INFO L93 Difference]: Finished difference Result 3429 states and 4904 transitions. [2021-11-23 02:02:23,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:02:23,037 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 65 [2021-11-23 02:02:23,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:02:23,073 INFO L225 Difference]: With dead ends: 3429 [2021-11-23 02:02:23,073 INFO L226 Difference]: Without dead ends: 3427 [2021-11-23 02:02:23,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:02:23,077 INFO L933 BasicCegarLoop]: 3257 mSDtfsCounter, 2493 mSDsluCounter, 9641 mSDsCounter, 0 mSdLazyCounter, 1489 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2504 SdHoareTripleChecker+Valid, 11823 SdHoareTripleChecker+Invalid, 1492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1489 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:02:23,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2504 Valid, 11823 Invalid, 1492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1489 Invalid, 2 Unknown, 0 Unchecked, 13.5s Time] [2021-11-23 02:02:23,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3427 states. [2021-11-23 02:02:23,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3427 to 3420. [2021-11-23 02:02:23,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3420 states, 1912 states have (on average 1.2839958158995817) internal successors, (2455), 2048 states have internal predecessors, (2455), 1222 states have call successors, (1222), 284 states have call predecessors, (1222), 283 states have return successors, (1219), 1191 states have call predecessors, (1219), 1219 states have call successors, (1219) [2021-11-23 02:02:23,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3420 states to 3420 states and 4896 transitions. [2021-11-23 02:02:23,328 INFO L78 Accepts]: Start accepts. Automaton has 3420 states and 4896 transitions. Word has length 65 [2021-11-23 02:02:23,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:02:23,329 INFO L470 AbstractCegarLoop]: Abstraction has 3420 states and 4896 transitions. [2021-11-23 02:02:23,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-23 02:02:23,329 INFO L276 IsEmpty]: Start isEmpty. Operand 3420 states and 4896 transitions. [2021-11-23 02:02:23,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-23 02:02:23,334 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:02:23,334 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 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] [2021-11-23 02:02:23,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:02:23,335 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:02:23,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:02:23,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1347775392, now seen corresponding path program 1 times [2021-11-23 02:02:23,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:02:23,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526778882] [2021-11-23 02:02:23,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:23,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:02:23,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:23,693 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-23 02:02:23,694 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:02:23,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526778882] [2021-11-23 02:02:23,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526778882] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:02:23,694 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:02:23,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:02:23,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904496794] [2021-11-23 02:02:23,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:02:23,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:02:23,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:02:23,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:02:23,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:02:23,698 INFO L87 Difference]: Start difference. First operand 3420 states and 4896 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-23 02:02:25,985 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:02:28,233 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:02:33,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:02:33,287 INFO L93 Difference]: Finished difference Result 3433 states and 4907 transitions. [2021-11-23 02:02:33,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:02:33,290 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 62 [2021-11-23 02:02:33,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:02:33,323 INFO L225 Difference]: With dead ends: 3433 [2021-11-23 02:02:33,323 INFO L226 Difference]: Without dead ends: 3431 [2021-11-23 02:02:33,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:02:33,327 INFO L933 BasicCegarLoop]: 3257 mSDtfsCounter, 2499 mSDsluCounter, 9638 mSDsCounter, 0 mSdLazyCounter, 1486 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2509 SdHoareTripleChecker+Valid, 11823 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1486 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:02:33,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2509 Valid, 11823 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1486 Invalid, 2 Unknown, 0 Unchecked, 9.3s Time] [2021-11-23 02:02:33,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3431 states. [2021-11-23 02:02:33,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3431 to 3424. [2021-11-23 02:02:33,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3424 states, 1915 states have (on average 1.28355091383812) internal successors, (2458), 2051 states have internal predecessors, (2458), 1222 states have call successors, (1222), 285 states have call predecessors, (1222), 284 states have return successors, (1219), 1191 states have call predecessors, (1219), 1219 states have call successors, (1219) [2021-11-23 02:02:33,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3424 states to 3424 states and 4899 transitions. [2021-11-23 02:02:33,546 INFO L78 Accepts]: Start accepts. Automaton has 3424 states and 4899 transitions. Word has length 62 [2021-11-23 02:02:33,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:02:33,547 INFO L470 AbstractCegarLoop]: Abstraction has 3424 states and 4899 transitions. [2021-11-23 02:02:33,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-23 02:02:33,547 INFO L276 IsEmpty]: Start isEmpty. Operand 3424 states and 4899 transitions. [2021-11-23 02:02:33,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-23 02:02:33,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:02:33,549 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 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] [2021-11-23 02:02:33,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 02:02:33,550 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:02:33,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:02:33,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1215900497, now seen corresponding path program 1 times [2021-11-23 02:02:33,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:02:33,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917340081] [2021-11-23 02:02:33,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:33,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:02:33,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:33,906 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-23 02:02:33,907 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:02:33,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917340081] [2021-11-23 02:02:33,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917340081] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:02:33,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:02:33,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:02:33,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900172796] [2021-11-23 02:02:33,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:02:33,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:02:33,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:02:33,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:02:33,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:02:33,910 INFO L87 Difference]: Start difference. First operand 3424 states and 4899 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-23 02:02:37,813 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:02:39,978 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:02:42,119 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:02:47,699 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:02:48,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:02:48,358 INFO L93 Difference]: Finished difference Result 6187 states and 8824 transitions. [2021-11-23 02:02:48,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:02:48,361 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 67 [2021-11-23 02:02:48,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:02:48,433 INFO L225 Difference]: With dead ends: 6187 [2021-11-23 02:02:48,433 INFO L226 Difference]: Without dead ends: 6185 [2021-11-23 02:02:48,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:02:48,439 INFO L933 BasicCegarLoop]: 3967 mSDtfsCounter, 2538 mSDsluCounter, 11857 mSDsCounter, 0 mSdLazyCounter, 1892 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2545 SdHoareTripleChecker+Valid, 14457 SdHoareTripleChecker+Invalid, 1898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1892 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:02:48,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2545 Valid, 14457 Invalid, 1898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1892 Invalid, 3 Unknown, 0 Unchecked, 14.1s Time] [2021-11-23 02:02:48,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6185 states. [2021-11-23 02:02:48,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6185 to 6173. [2021-11-23 02:02:48,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6173 states, 3454 states have (on average 1.2770700636942676) internal successors, (4411), 3699 states have internal predecessors, (4411), 2187 states have call successors, (2187), 551 states have call predecessors, (2187), 529 states have return successors, (2215), 2104 states have call predecessors, (2215), 2181 states have call successors, (2215) [2021-11-23 02:02:48,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6173 states to 6173 states and 8813 transitions. [2021-11-23 02:02:48,942 INFO L78 Accepts]: Start accepts. Automaton has 6173 states and 8813 transitions. Word has length 67 [2021-11-23 02:02:48,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:02:48,943 INFO L470 AbstractCegarLoop]: Abstraction has 6173 states and 8813 transitions. [2021-11-23 02:02:48,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-23 02:02:48,943 INFO L276 IsEmpty]: Start isEmpty. Operand 6173 states and 8813 transitions. [2021-11-23 02:02:48,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-23 02:02:48,946 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:02:48,946 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:02:48,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 02:02:48,947 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:02:48,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:02:48,948 INFO L85 PathProgramCache]: Analyzing trace with hash 826588219, now seen corresponding path program 1 times [2021-11-23 02:02:48,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:02:48,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442726174] [2021-11-23 02:02:48,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:48,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:02:49,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:49,283 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-23 02:02:49,284 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:02:49,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442726174] [2021-11-23 02:02:49,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442726174] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:02:49,284 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:02:49,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:02:49,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699751332] [2021-11-23 02:02:49,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:02:49,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:02:49,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:02:49,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:02:49,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:02:49,287 INFO L87 Difference]: Start difference. First operand 6173 states and 8813 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-23 02:02:51,152 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:02:53,179 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:02:55,211 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:02:56,588 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:02:58,608 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:03:00,628 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:03:02,910 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:03:06,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:03:06,051 INFO L93 Difference]: Finished difference Result 6183 states and 8822 transitions. [2021-11-23 02:03:06,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:03:06,054 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 80 [2021-11-23 02:03:06,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:03:06,091 INFO L225 Difference]: With dead ends: 6183 [2021-11-23 02:03:06,091 INFO L226 Difference]: Without dead ends: 6181 [2021-11-23 02:03:06,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:03:06,097 INFO L933 BasicCegarLoop]: 2654 mSDtfsCounter, 2992 mSDsluCounter, 6025 mSDsCounter, 0 mSdLazyCounter, 1124 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2998 SdHoareTripleChecker+Valid, 7941 SdHoareTripleChecker+Invalid, 1129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1124 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:03:06,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2998 Valid, 7941 Invalid, 1129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1124 Invalid, 4 Unknown, 0 Unchecked, 16.5s Time] [2021-11-23 02:03:06,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6181 states. [2021-11-23 02:03:06,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6181 to 6181. [2021-11-23 02:03:06,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6181 states, 3460 states have (on average 1.2765895953757225) internal successors, (4417), 3705 states have internal predecessors, (4417), 2187 states have call successors, (2187), 553 states have call predecessors, (2187), 531 states have return successors, (2215), 2104 states have call predecessors, (2215), 2181 states have call successors, (2215) [2021-11-23 02:03:06,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6181 states to 6181 states and 8819 transitions. [2021-11-23 02:03:06,531 INFO L78 Accepts]: Start accepts. Automaton has 6181 states and 8819 transitions. Word has length 80 [2021-11-23 02:03:06,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:03:06,533 INFO L470 AbstractCegarLoop]: Abstraction has 6181 states and 8819 transitions. [2021-11-23 02:03:06,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-23 02:03:06,533 INFO L276 IsEmpty]: Start isEmpty. Operand 6181 states and 8819 transitions. [2021-11-23 02:03:06,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 02:03:06,542 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:03:06,543 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 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] [2021-11-23 02:03:06,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 02:03:06,543 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:03:06,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:03:06,544 INFO L85 PathProgramCache]: Analyzing trace with hash -479834353, now seen corresponding path program 1 times [2021-11-23 02:03:06,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:03:06,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360330055] [2021-11-23 02:03:06,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:03:06,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:03:06,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:03:06,881 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2021-11-23 02:03:06,882 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:03:06,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360330055] [2021-11-23 02:03:06,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360330055] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:03:06,882 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:03:06,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:03:06,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149730850] [2021-11-23 02:03:06,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:03:06,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:03:06,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:03:06,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:03:06,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:03:06,886 INFO L87 Difference]: Start difference. First operand 6181 states and 8819 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-23 02:03:09,305 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:03:11,538 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:03:18,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:03:18,653 INFO L93 Difference]: Finished difference Result 12040 states and 17265 transitions. [2021-11-23 02:03:18,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:03:18,656 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 77 [2021-11-23 02:03:18,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:03:18,741 INFO L225 Difference]: With dead ends: 12040 [2021-11-23 02:03:18,741 INFO L226 Difference]: Without dead ends: 12038 [2021-11-23 02:03:18,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:03:18,752 INFO L933 BasicCegarLoop]: 3663 mSDtfsCounter, 2834 mSDsluCounter, 11146 mSDsCounter, 0 mSdLazyCounter, 1695 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2839 SdHoareTripleChecker+Valid, 13574 SdHoareTripleChecker+Invalid, 1700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1695 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:03:18,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2839 Valid, 13574 Invalid, 1700 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [3 Valid, 1695 Invalid, 2 Unknown, 0 Unchecked, 11.1s Time] [2021-11-23 02:03:18,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12038 states. [2021-11-23 02:03:19,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12038 to 12026. [2021-11-23 02:03:19,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12026 states, 6758 states have (on average 1.276561112755253) internal successors, (8627), 7236 states have internal predecessors, (8627), 4230 states have call successors, (4230), 1087 states have call predecessors, (4230), 1035 states have return successors, (4396), 4055 states have call predecessors, (4396), 4218 states have call successors, (4396) [2021-11-23 02:03:19,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12026 states to 12026 states and 17253 transitions. [2021-11-23 02:03:19,815 INFO L78 Accepts]: Start accepts. Automaton has 12026 states and 17253 transitions. Word has length 77 [2021-11-23 02:03:19,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:03:19,816 INFO L470 AbstractCegarLoop]: Abstraction has 12026 states and 17253 transitions. [2021-11-23 02:03:19,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-23 02:03:19,816 INFO L276 IsEmpty]: Start isEmpty. Operand 12026 states and 17253 transitions. [2021-11-23 02:03:19,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-23 02:03:19,819 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:03:19,819 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 3, 3, 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] [2021-11-23 02:03:19,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 02:03:19,820 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:03:19,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:03:19,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1471347232, now seen corresponding path program 1 times [2021-11-23 02:03:19,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:03:19,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781534593] [2021-11-23 02:03:19,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:03:19,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:03:19,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:03:20,174 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-11-23 02:03:20,175 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:03:20,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781534593] [2021-11-23 02:03:20,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781534593] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:03:20,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:03:20,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:03:20,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213316754] [2021-11-23 02:03:20,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:03:20,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:03:20,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:03:20,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:03:20,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:03:20,178 INFO L87 Difference]: Start difference. First operand 12026 states and 17253 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-23 02:03:22,466 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:03:24,706 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:03:30,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:03:30,519 INFO L93 Difference]: Finished difference Result 12060 states and 17288 transitions. [2021-11-23 02:03:30,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:03:30,523 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 82 [2021-11-23 02:03:30,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:03:30,595 INFO L225 Difference]: With dead ends: 12060 [2021-11-23 02:03:30,595 INFO L226 Difference]: Without dead ends: 12058 [2021-11-23 02:03:30,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:03:30,607 INFO L933 BasicCegarLoop]: 3235 mSDtfsCounter, 2499 mSDsluCounter, 9584 mSDsCounter, 0 mSdLazyCounter, 1471 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2505 SdHoareTripleChecker+Valid, 11757 SdHoareTripleChecker+Invalid, 1474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1471 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:03:30,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2505 Valid, 11757 Invalid, 1474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1471 Invalid, 2 Unknown, 0 Unchecked, 9.9s Time] [2021-11-23 02:03:30,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12058 states. [2021-11-23 02:03:31,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12058 to 12054. [2021-11-23 02:03:31,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12054 states, 6778 states have (on average 1.2757450575390972) internal successors, (8647), 7260 states have internal predecessors, (8647), 4230 states have call successors, (4230), 1091 states have call predecessors, (4230), 1043 states have return successors, (4404), 4055 states have call predecessors, (4404), 4218 states have call successors, (4404) [2021-11-23 02:03:31,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12054 states to 12054 states and 17281 transitions. [2021-11-23 02:03:31,737 INFO L78 Accepts]: Start accepts. Automaton has 12054 states and 17281 transitions. Word has length 82 [2021-11-23 02:03:31,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:03:31,738 INFO L470 AbstractCegarLoop]: Abstraction has 12054 states and 17281 transitions. [2021-11-23 02:03:31,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-23 02:03:31,738 INFO L276 IsEmpty]: Start isEmpty. Operand 12054 states and 17281 transitions. [2021-11-23 02:03:31,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-23 02:03:31,743 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:03:31,743 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:03:31,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 02:03:31,744 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:03:31,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:03:31,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1620366484, now seen corresponding path program 1 times [2021-11-23 02:03:31,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:03:31,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878350341] [2021-11-23 02:03:31,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:03:31,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:03:31,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:03:32,080 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-23 02:03:32,081 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:03:32,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878350341] [2021-11-23 02:03:32,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878350341] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:03:32,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:03:32,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:03:32,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214026675] [2021-11-23 02:03:32,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:03:32,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:03:32,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:03:32,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:03:32,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:03:32,084 INFO L87 Difference]: Start difference. First operand 12054 states and 17281 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 02:03:34,382 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:03:37,786 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:03:39,804 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:03:44,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:03:44,792 INFO L93 Difference]: Finished difference Result 12076 states and 17300 transitions. [2021-11-23 02:03:44,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:03:44,795 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 95 [2021-11-23 02:03:44,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:03:44,869 INFO L225 Difference]: With dead ends: 12076 [2021-11-23 02:03:44,869 INFO L226 Difference]: Without dead ends: 12074 [2021-11-23 02:03:44,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:03:44,880 INFO L933 BasicCegarLoop]: 3235 mSDtfsCounter, 2493 mSDsluCounter, 9587 mSDsCounter, 0 mSdLazyCounter, 1474 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2498 SdHoareTripleChecker+Valid, 11757 SdHoareTripleChecker+Invalid, 1477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1474 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:03:44,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2498 Valid, 11757 Invalid, 1477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1474 Invalid, 2 Unknown, 0 Unchecked, 12.3s Time] [2021-11-23 02:03:44,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12074 states. [2021-11-23 02:03:45,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12074 to 12070. [2021-11-23 02:03:45,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12070 states, 6790 states have (on average 1.2752577319587628) internal successors, (8659), 7272 states have internal predecessors, (8659), 4230 states have call successors, (4230), 1095 states have call predecessors, (4230), 1047 states have return successors, (4404), 4055 states have call predecessors, (4404), 4218 states have call successors, (4404) [2021-11-23 02:03:45,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12070 states to 12070 states and 17293 transitions. [2021-11-23 02:03:45,840 INFO L78 Accepts]: Start accepts. Automaton has 12070 states and 17293 transitions. Word has length 95 [2021-11-23 02:03:45,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:03:45,841 INFO L470 AbstractCegarLoop]: Abstraction has 12070 states and 17293 transitions. [2021-11-23 02:03:45,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 02:03:45,841 INFO L276 IsEmpty]: Start isEmpty. Operand 12070 states and 17293 transitions. [2021-11-23 02:03:45,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-23 02:03:45,845 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:03:45,845 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:03:45,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 02:03:45,846 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:03:45,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:03:45,847 INFO L85 PathProgramCache]: Analyzing trace with hash -2022759465, now seen corresponding path program 1 times [2021-11-23 02:03:45,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:03:45,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633593468] [2021-11-23 02:03:45,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:03:45,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:03:45,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:03:46,138 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-23 02:03:46,139 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:03:46,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633593468] [2021-11-23 02:03:46,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633593468] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:03:46,139 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:03:46,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:03:46,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184315509] [2021-11-23 02:03:46,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:03:46,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:03:46,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:03:46,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:03:46,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:03:46,142 INFO L87 Difference]: Start difference. First operand 12070 states and 17293 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-23 02:03:48,465 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:03:49,815 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:03:51,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:03:51,607 INFO L93 Difference]: Finished difference Result 23816 states and 34053 transitions. [2021-11-23 02:03:51,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:03:51,610 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 94 [2021-11-23 02:03:51,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:03:51,689 INFO L225 Difference]: With dead ends: 23816 [2021-11-23 02:03:51,690 INFO L226 Difference]: Without dead ends: 12054 [2021-11-23 02:03:51,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:03:51,776 INFO L933 BasicCegarLoop]: 2646 mSDtfsCounter, 3009 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3009 SdHoareTripleChecker+Valid, 2646 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:03:51,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3009 Valid, 2646 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2021-11-23 02:03:51,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12054 states. [2021-11-23 02:03:52,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12054 to 12054. [2021-11-23 02:03:52,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12054 states, 6782 states have (on average 1.2749926275434975) internal successors, (8647), 7264 states have internal predecessors, (8647), 4222 states have call successors, (4222), 1095 states have call predecessors, (4222), 1047 states have return successors, (4380), 4047 states have call predecessors, (4380), 4210 states have call successors, (4380) [2021-11-23 02:03:52,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12054 states to 12054 states and 17249 transitions. [2021-11-23 02:03:52,800 INFO L78 Accepts]: Start accepts. Automaton has 12054 states and 17249 transitions. Word has length 94 [2021-11-23 02:03:52,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:03:52,801 INFO L470 AbstractCegarLoop]: Abstraction has 12054 states and 17249 transitions. [2021-11-23 02:03:52,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-23 02:03:52,801 INFO L276 IsEmpty]: Start isEmpty. Operand 12054 states and 17249 transitions. [2021-11-23 02:03:52,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-23 02:03:52,804 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:03:52,804 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 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] [2021-11-23 02:03:52,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 02:03:52,805 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)] === [2021-11-23 02:03:52,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:03:52,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1907097856, now seen corresponding path program 1 times [2021-11-23 02:03:52,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:03:52,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786133263] [2021-11-23 02:03:52,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:03:52,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:03:52,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:03:53,150 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-23 02:03:53,151 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:03:53,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786133263] [2021-11-23 02:03:53,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786133263] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:03:53,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:03:53,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:03:53,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040987042] [2021-11-23 02:03:53,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:03:53,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:03:53,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:03:53,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:03:53,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:03:53,154 INFO L87 Difference]: Start difference. First operand 12054 states and 17249 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 02:03:55,769 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:03:58,014 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:04:02,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:04:02,358 INFO L93 Difference]: Finished difference Result 12076 states and 17268 transitions. [2021-11-23 02:04:02,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:04:02,362 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 92 [2021-11-23 02:04:02,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:04:02,429 INFO L225 Difference]: With dead ends: 12076 [2021-11-23 02:04:02,430 INFO L226 Difference]: Without dead ends: 12074 [2021-11-23 02:04:02,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:04:02,439 INFO L933 BasicCegarLoop]: 3167 mSDtfsCounter, 2492 mSDsluCounter, 9428 mSDsCounter, 0 mSdLazyCounter, 1441 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2495 SdHoareTripleChecker+Valid, 11553 SdHoareTripleChecker+Invalid, 1444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1441 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:04:02,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2495 Valid, 11553 Invalid, 1444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1441 Invalid, 2 Unknown, 0 Unchecked, 8.7s Time] [2021-11-23 02:04:02,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12074 states. [2021-11-23 02:04:03,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12074 to 12070. [2021-11-23 02:04:03,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12070 states, 6794 states have (on average 1.2745069178687076) internal successors, (8659), 7276 states have internal predecessors, (8659), 4222 states have call successors, (4222), 1099 states have call predecessors, (4222), 1051 states have return successors, (4380), 4047 states have call predecessors, (4380), 4210 states have call successors, (4380) [2021-11-23 02:04:03,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12070 states to 12070 states and 17261 transitions. [2021-11-23 02:04:03,327 INFO L78 Accepts]: Start accepts. Automaton has 12070 states and 17261 transitions. Word has length 92 [2021-11-23 02:04:03,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:04:03,328 INFO L470 AbstractCegarLoop]: Abstraction has 12070 states and 17261 transitions. [2021-11-23 02:04:03,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 02:04:03,329 INFO L276 IsEmpty]: Start isEmpty. Operand 12070 states and 17261 transitions. [2021-11-23 02:04:03,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-23 02:04:03,332 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:04:03,333 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:04:03,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 02:04:03,333 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:04:03,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:04:03,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1548168012, now seen corresponding path program 1 times [2021-11-23 02:04:03,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:04:03,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662106456] [2021-11-23 02:04:03,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:04:03,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:04:03,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:04:03,679 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2021-11-23 02:04:03,680 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:04:03,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662106456] [2021-11-23 02:04:03,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662106456] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:04:03,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:04:03,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:04:03,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372025285] [2021-11-23 02:04:03,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:04:03,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:04:03,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:04:03,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:04:03,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:04:03,683 INFO L87 Difference]: Start difference. First operand 12070 states and 17261 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-23 02:04:06,245 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:04:07,478 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:04:09,493 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:04:10,534 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:04:12,301 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:04:17,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:04:17,214 INFO L93 Difference]: Finished difference Result 12092 states and 17280 transitions. [2021-11-23 02:04:17,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:04:17,218 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 105 [2021-11-23 02:04:17,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:04:17,270 INFO L225 Difference]: With dead ends: 12092 [2021-11-23 02:04:17,271 INFO L226 Difference]: Without dead ends: 12088 [2021-11-23 02:04:17,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:04:17,280 INFO L933 BasicCegarLoop]: 3167 mSDtfsCounter, 2486 mSDsluCounter, 9431 mSDsCounter, 0 mSdLazyCounter, 1444 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2488 SdHoareTripleChecker+Valid, 11553 SdHoareTripleChecker+Invalid, 1447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1444 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:04:17,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2488 Valid, 11553 Invalid, 1447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1444 Invalid, 2 Unknown, 0 Unchecked, 12.9s Time] [2021-11-23 02:04:17,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12088 states. [2021-11-23 02:04:18,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12088 to 12084. [2021-11-23 02:04:18,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12084 states, 6805 states have (on average 1.2739162380602498) internal successors, (8669), 7286 states have internal predecessors, (8669), 4222 states have call successors, (4222), 1103 states have call predecessors, (4222), 1054 states have return successors, (4380), 4047 states have call predecessors, (4380), 4210 states have call successors, (4380) [2021-11-23 02:04:18,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12084 states to 12084 states and 17271 transitions. [2021-11-23 02:04:18,280 INFO L78 Accepts]: Start accepts. Automaton has 12084 states and 17271 transitions. Word has length 105 [2021-11-23 02:04:18,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:04:18,281 INFO L470 AbstractCegarLoop]: Abstraction has 12084 states and 17271 transitions. [2021-11-23 02:04:18,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-23 02:04:18,282 INFO L276 IsEmpty]: Start isEmpty. Operand 12084 states and 17271 transitions. [2021-11-23 02:04:18,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-23 02:04:18,286 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:04:18,287 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 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] [2021-11-23 02:04:18,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 02:04:18,287 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:04:18,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:04:18,288 INFO L85 PathProgramCache]: Analyzing trace with hash -399806859, now seen corresponding path program 1 times [2021-11-23 02:04:18,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:04:18,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036299811] [2021-11-23 02:04:18,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:04:18,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:04:18,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:04:18,728 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-23 02:04:18,728 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:04:18,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036299811] [2021-11-23 02:04:18,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036299811] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:04:18,729 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:04:18,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:04:18,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164882701] [2021-11-23 02:04:18,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:04:18,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:04:18,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:04:18,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:04:18,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:04:18,731 INFO L87 Difference]: Start difference. First operand 12084 states and 17271 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-23 02:04:21,254 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:04:22,967 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:04:24,986 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:04:27,315 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:04:31,255 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:04:32,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:04:32,205 INFO L93 Difference]: Finished difference Result 15695 states and 22236 transitions. [2021-11-23 02:04:32,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:04:32,209 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 118 [2021-11-23 02:04:32,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:04:32,268 INFO L225 Difference]: With dead ends: 15695 [2021-11-23 02:04:32,269 INFO L226 Difference]: Without dead ends: 15693 [2021-11-23 02:04:32,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:04:32,277 INFO L933 BasicCegarLoop]: 3129 mSDtfsCounter, 2709 mSDsluCounter, 8973 mSDsCounter, 0 mSdLazyCounter, 1399 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2712 SdHoareTripleChecker+Valid, 11094 SdHoareTripleChecker+Invalid, 1405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1399 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:04:32,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2712 Valid, 11094 Invalid, 1405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1399 Invalid, 3 Unknown, 0 Unchecked, 12.7s Time] [2021-11-23 02:04:32,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15693 states. [2021-11-23 02:04:33,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15693 to 15534. [2021-11-23 02:04:33,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15534 states, 8772 states have (on average 1.2645918832649339) internal successors, (11093), 9351 states have internal predecessors, (11093), 5267 states have call successors, (5267), 1591 states have call predecessors, (5267), 1492 states have return successors, (5708), 5000 states have call predecessors, (5708), 5255 states have call successors, (5708) [2021-11-23 02:04:33,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15534 states to 15534 states and 22068 transitions. [2021-11-23 02:04:33,468 INFO L78 Accepts]: Start accepts. Automaton has 15534 states and 22068 transitions. Word has length 118 [2021-11-23 02:04:33,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:04:33,468 INFO L470 AbstractCegarLoop]: Abstraction has 15534 states and 22068 transitions. [2021-11-23 02:04:33,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-23 02:04:33,469 INFO L276 IsEmpty]: Start isEmpty. Operand 15534 states and 22068 transitions. [2021-11-23 02:04:33,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-23 02:04:33,473 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:04:33,473 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:04:33,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 02:04:33,474 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:04:33,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:04:33,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1506385499, now seen corresponding path program 1 times [2021-11-23 02:04:33,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:04:33,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50507135] [2021-11-23 02:04:33,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:04:33,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:04:33,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:04:33,835 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2021-11-23 02:04:33,836 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:04:33,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50507135] [2021-11-23 02:04:33,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50507135] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:04:33,839 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:04:33,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:04:33,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564213768] [2021-11-23 02:04:33,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:04:33,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:04:33,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:04:33,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:04:33,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:04:33,842 INFO L87 Difference]: Start difference. First operand 15534 states and 22068 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-23 02:04:36,493 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:04:38,305 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:04:40,525 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:04:41,544 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:04:45,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:04:45,423 INFO L93 Difference]: Finished difference Result 15707 states and 22240 transitions. [2021-11-23 02:04:45,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:04:45,426 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 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 110 [2021-11-23 02:04:45,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:04:45,491 INFO L225 Difference]: With dead ends: 15707 [2021-11-23 02:04:45,492 INFO L226 Difference]: Without dead ends: 15537 [2021-11-23 02:04:45,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:04:45,501 INFO L933 BasicCegarLoop]: 3136 mSDtfsCounter, 2723 mSDsluCounter, 8971 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2723 SdHoareTripleChecker+Valid, 11097 SdHoareTripleChecker+Invalid, 1417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:04:45,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2723 Valid, 11097 Invalid, 1417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1413 Invalid, 1 Unknown, 0 Unchecked, 10.6s Time] [2021-11-23 02:04:45,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15537 states. [2021-11-23 02:04:46,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15537 to 15514. [2021-11-23 02:04:46,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15514 states, 8761 states have (on average 1.2645816687592741) internal successors, (11079), 9339 states have internal predecessors, (11079), 5262 states have call successors, (5262), 1588 states have call predecessors, (5262), 1488 states have return successors, (5699), 4995 states have call predecessors, (5699), 5246 states have call successors, (5699) [2021-11-23 02:04:46,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15514 states to 15514 states and 22040 transitions. [2021-11-23 02:04:46,832 INFO L78 Accepts]: Start accepts. Automaton has 15514 states and 22040 transitions. Word has length 110 [2021-11-23 02:04:46,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:04:46,833 INFO L470 AbstractCegarLoop]: Abstraction has 15514 states and 22040 transitions. [2021-11-23 02:04:46,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-23 02:04:46,833 INFO L276 IsEmpty]: Start isEmpty. Operand 15514 states and 22040 transitions. [2021-11-23 02:04:46,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-23 02:04:46,841 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:04:46,841 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 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] [2021-11-23 02:04:46,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 02:04:46,842 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:04:46,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:04:46,843 INFO L85 PathProgramCache]: Analyzing trace with hash 392401905, now seen corresponding path program 1 times [2021-11-23 02:04:46,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:04:46,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480944931] [2021-11-23 02:04:46,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:04:46,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:04:46,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:04:47,186 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-23 02:04:47,187 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:04:47,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480944931] [2021-11-23 02:04:47,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480944931] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:04:47,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:04:47,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:04:47,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929078124] [2021-11-23 02:04:47,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:04:47,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:04:47,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:04:47,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:04:47,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:04:47,190 INFO L87 Difference]: Start difference. First operand 15514 states and 22040 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-23 02:04:50,027 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:04:53,230 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:04:56,219 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:05:00,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:05:00,032 INFO L93 Difference]: Finished difference Result 15964 states and 22566 transitions. [2021-11-23 02:05:00,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:05:00,034 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 146 [2021-11-23 02:05:00,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:05:00,107 INFO L225 Difference]: With dead ends: 15964 [2021-11-23 02:05:00,107 INFO L226 Difference]: Without dead ends: 15950 [2021-11-23 02:05:00,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:05:00,117 INFO L933 BasicCegarLoop]: 2977 mSDtfsCounter, 691 mSDsluCounter, 9563 mSDsCounter, 0 mSdLazyCounter, 1680 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 693 SdHoareTripleChecker+Valid, 11312 SdHoareTripleChecker+Invalid, 1684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1680 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:05:00,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [693 Valid, 11312 Invalid, 1684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1680 Invalid, 3 Unknown, 0 Unchecked, 11.9s Time] [2021-11-23 02:05:00,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15950 states. [2021-11-23 02:05:01,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15950 to 15934. [2021-11-23 02:05:01,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15934 states, 8999 states have (on average 1.2614734970552284) internal successors, (11352), 9581 states have internal predecessors, (11352), 5358 states have call successors, (5358), 1675 states have call predecessors, (5358), 1574 states have return successors, (5817), 5089 states have call predecessors, (5817), 5343 states have call successors, (5817) [2021-11-23 02:05:01,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15934 states to 15934 states and 22527 transitions. [2021-11-23 02:05:01,222 INFO L78 Accepts]: Start accepts. Automaton has 15934 states and 22527 transitions. Word has length 146 [2021-11-23 02:05:01,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:05:01,224 INFO L470 AbstractCegarLoop]: Abstraction has 15934 states and 22527 transitions. [2021-11-23 02:05:01,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-23 02:05:01,224 INFO L276 IsEmpty]: Start isEmpty. Operand 15934 states and 22527 transitions. [2021-11-23 02:05:01,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-23 02:05:01,231 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:05:01,231 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-23 02:05:01,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-23 02:05:01,232 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)] === [2021-11-23 02:05:01,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:05:01,233 INFO L85 PathProgramCache]: Analyzing trace with hash 87594185, now seen corresponding path program 1 times [2021-11-23 02:05:01,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:05:01,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548158989] [2021-11-23 02:05:01,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:05:01,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:05:01,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:05:01,686 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-11-23 02:05:01,686 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:05:01,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548158989] [2021-11-23 02:05:01,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548158989] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:05:01,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:05:01,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:05:01,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978133232] [2021-11-23 02:05:01,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:05:01,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:05:01,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:05:01,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:05:01,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:05:01,690 INFO L87 Difference]: Start difference. First operand 15934 states and 22527 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-23 02:05:04,146 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:05:05,850 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:05:07,406 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:05:12,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:05:12,949 INFO L93 Difference]: Finished difference Result 19068 states and 26909 transitions. [2021-11-23 02:05:12,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:05:12,952 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 152 [2021-11-23 02:05:12,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:05:13,062 INFO L225 Difference]: With dead ends: 19068 [2021-11-23 02:05:13,062 INFO L226 Difference]: Without dead ends: 19066 [2021-11-23 02:05:13,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:05:13,077 INFO L933 BasicCegarLoop]: 3992 mSDtfsCounter, 2455 mSDsluCounter, 11911 mSDsCounter, 0 mSdLazyCounter, 1887 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2458 SdHoareTripleChecker+Valid, 14534 SdHoareTripleChecker+Invalid, 1891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1887 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:05:13,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2458 Valid, 14534 Invalid, 1891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1887 Invalid, 1 Unknown, 0 Unchecked, 10.4s Time] [2021-11-23 02:05:13,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19066 states. [2021-11-23 02:05:14,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19066 to 18926. [2021-11-23 02:05:14,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18926 states, 10696 states have (on average 1.2585078534031413) internal successors, (13461), 11384 states have internal predecessors, (13461), 6353 states have call successors, (6353), 1999 states have call predecessors, (6353), 1874 states have return successors, (6951), 6026 states have call predecessors, (6951), 6338 states have call successors, (6951) [2021-11-23 02:05:14,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18926 states to 18926 states and 26765 transitions. [2021-11-23 02:05:14,385 INFO L78 Accepts]: Start accepts. Automaton has 18926 states and 26765 transitions. Word has length 152 [2021-11-23 02:05:14,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:05:14,386 INFO L470 AbstractCegarLoop]: Abstraction has 18926 states and 26765 transitions. [2021-11-23 02:05:14,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-23 02:05:14,386 INFO L276 IsEmpty]: Start isEmpty. Operand 18926 states and 26765 transitions. [2021-11-23 02:05:14,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-23 02:05:14,394 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:05:14,394 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:05:14,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-23 02:05:14,395 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:05:14,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:05:14,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1760337478, now seen corresponding path program 1 times [2021-11-23 02:05:14,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:05:14,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940634620] [2021-11-23 02:05:14,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:05:14,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:05:14,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:05:15,064 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-23 02:05:15,065 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:05:15,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940634620] [2021-11-23 02:05:15,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940634620] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:05:15,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:05:15,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:05:15,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922465802] [2021-11-23 02:05:15,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:05:15,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:05:15,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:05:15,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:05:15,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:05:15,070 INFO L87 Difference]: Start difference. First operand 18926 states and 26765 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-23 02:05:18,562 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:05:20,588 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:05:22,817 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:05:27,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:05:27,040 INFO L93 Difference]: Finished difference Result 18952 states and 26788 transitions. [2021-11-23 02:05:27,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:05:27,043 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 161 [2021-11-23 02:05:27,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:05:27,117 INFO L225 Difference]: With dead ends: 18952 [2021-11-23 02:05:27,117 INFO L226 Difference]: Without dead ends: 18950 [2021-11-23 02:05:27,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:05:27,129 INFO L933 BasicCegarLoop]: 2757 mSDtfsCounter, 2689 mSDsluCounter, 6954 mSDsCounter, 0 mSdLazyCounter, 1217 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2692 SdHoareTripleChecker+Valid, 8879 SdHoareTripleChecker+Invalid, 1223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1217 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:05:27,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2692 Valid, 8879 Invalid, 1223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1217 Invalid, 3 Unknown, 0 Unchecked, 11.1s Time] [2021-11-23 02:05:27,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18950 states. [2021-11-23 02:05:28,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18950 to 18934. [2021-11-23 02:05:28,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18934 states, 10702 states have (on average 1.2581760418613344) internal successors, (13465), 11390 states have internal predecessors, (13465), 6353 states have call successors, (6353), 2001 states have call predecessors, (6353), 1876 states have return successors, (6951), 6026 states have call predecessors, (6951), 6338 states have call successors, (6951) [2021-11-23 02:05:28,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18934 states to 18934 states and 26769 transitions. [2021-11-23 02:05:28,261 INFO L78 Accepts]: Start accepts. Automaton has 18934 states and 26769 transitions. Word has length 161 [2021-11-23 02:05:28,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:05:28,262 INFO L470 AbstractCegarLoop]: Abstraction has 18934 states and 26769 transitions. [2021-11-23 02:05:28,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-23 02:05:28,262 INFO L276 IsEmpty]: Start isEmpty. Operand 18934 states and 26769 transitions. [2021-11-23 02:05:28,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-23 02:05:28,270 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:05:28,270 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-23 02:05:28,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-23 02:05:28,271 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:05:28,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:05:28,272 INFO L85 PathProgramCache]: Analyzing trace with hash 927177445, now seen corresponding path program 1 times [2021-11-23 02:05:28,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:05:28,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984001308] [2021-11-23 02:05:28,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:05:28,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:05:28,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:05:28,780 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2021-11-23 02:05:28,780 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:05:28,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984001308] [2021-11-23 02:05:28,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984001308] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:05:28,781 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:05:28,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:05:28,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659577653] [2021-11-23 02:05:28,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:05:28,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:05:28,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:05:28,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:05:28,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:05:28,783 INFO L87 Difference]: Start difference. First operand 18934 states and 26769 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-23 02:05:31,172 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:05:33,094 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:05:35,421 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:05:42,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:05:42,174 INFO L93 Difference]: Finished difference Result 21105 states and 29519 transitions. [2021-11-23 02:05:42,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:05:42,175 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 177 [2021-11-23 02:05:42,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:05:42,263 INFO L225 Difference]: With dead ends: 21105 [2021-11-23 02:05:42,264 INFO L226 Difference]: Without dead ends: 21103 [2021-11-23 02:05:42,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:05:42,271 INFO L933 BasicCegarLoop]: 3313 mSDtfsCounter, 1559 mSDsluCounter, 10217 mSDsCounter, 0 mSdLazyCounter, 1702 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1562 SdHoareTripleChecker+Valid, 12292 SdHoareTripleChecker+Invalid, 1705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1702 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:05:42,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1562 Valid, 12292 Invalid, 1705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1702 Invalid, 2 Unknown, 0 Unchecked, 12.5s Time] [2021-11-23 02:05:42,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21103 states. [2021-11-23 02:05:43,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21103 to 21085. [2021-11-23 02:05:43,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21085 states, 11838 states have (on average 1.2508025004223686) internal successors, (14807), 12586 states have internal predecessors, (14807), 7044 states have call successors, (7044), 2336 states have call predecessors, (7044), 2200 states have return successors, (7642), 6696 states have call predecessors, (7642), 7029 states have call successors, (7642) [2021-11-23 02:05:43,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21085 states to 21085 states and 29493 transitions. [2021-11-23 02:05:43,570 INFO L78 Accepts]: Start accepts. Automaton has 21085 states and 29493 transitions. Word has length 177 [2021-11-23 02:05:43,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:05:43,571 INFO L470 AbstractCegarLoop]: Abstraction has 21085 states and 29493 transitions. [2021-11-23 02:05:43,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-23 02:05:43,571 INFO L276 IsEmpty]: Start isEmpty. Operand 21085 states and 29493 transitions. [2021-11-23 02:05:43,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-23 02:05:43,583 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:05:43,584 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:05:43,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-23 02:05:43,584 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:05:43,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:05:43,585 INFO L85 PathProgramCache]: Analyzing trace with hash -345559830, now seen corresponding path program 1 times [2021-11-23 02:05:43,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:05:43,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102491798] [2021-11-23 02:05:43,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:05:43,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:05:43,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:05:43,990 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-11-23 02:05:43,991 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:05:43,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102491798] [2021-11-23 02:05:43,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102491798] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:05:43,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:05:43,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:05:43,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240182561] [2021-11-23 02:05:43,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:05:43,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:05:43,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:05:43,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:05:43,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:05:43,994 INFO L87 Difference]: Start difference. First operand 21085 states and 29493 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (45), 3 states have call predecessors, (45), 1 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-23 02:05:45,465 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:05:47,487 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:05:49,515 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:05:51,724 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:05:56,793 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:05:58,819 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:06:00,851 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:06:05,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:05,570 INFO L93 Difference]: Finished difference Result 29637 states and 41570 transitions. [2021-11-23 02:06:05,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:06:05,573 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (45), 3 states have call predecessors, (45), 1 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) Word has length 238 [2021-11-23 02:06:05,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:05,695 INFO L225 Difference]: With dead ends: 29637 [2021-11-23 02:06:05,695 INFO L226 Difference]: Without dead ends: 29635 [2021-11-23 02:06:05,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:06:05,707 INFO L933 BasicCegarLoop]: 3612 mSDtfsCounter, 2829 mSDsluCounter, 11032 mSDsCounter, 0 mSdLazyCounter, 1655 mSolverCounterSat, 3 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2832 SdHoareTripleChecker+Valid, 13424 SdHoareTripleChecker+Invalid, 1664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1655 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:05,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2832 Valid, 13424 Invalid, 1664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1655 Invalid, 6 Unknown, 0 Unchecked, 19.8s Time] [2021-11-23 02:06:05,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29635 states. [2021-11-23 02:06:07,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29635 to 29346. [2021-11-23 02:06:07,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29346 states, 16541 states have (on average 1.25071035608488) internal successors, (20688), 17571 states have internal predecessors, (20688), 9755 states have call successors, (9755), 3257 states have call predecessors, (9755), 3047 states have return successors, (10817), 9243 states have call predecessors, (10817), 9740 states have call successors, (10817) [2021-11-23 02:06:07,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29346 states to 29346 states and 41260 transitions. [2021-11-23 02:06:07,449 INFO L78 Accepts]: Start accepts. Automaton has 29346 states and 41260 transitions. Word has length 238 [2021-11-23 02:06:07,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:07,449 INFO L470 AbstractCegarLoop]: Abstraction has 29346 states and 41260 transitions. [2021-11-23 02:06:07,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (45), 3 states have call predecessors, (45), 1 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-23 02:06:07,450 INFO L276 IsEmpty]: Start isEmpty. Operand 29346 states and 41260 transitions. [2021-11-23 02:06:07,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-23 02:06:07,467 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:07,468 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-23 02:06:07,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-23 02:06:07,469 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:06:07,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:07,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1165243357, now seen corresponding path program 1 times [2021-11-23 02:06:07,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:06:07,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73046403] [2021-11-23 02:06:07,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:07,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:06:07,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:07,835 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2021-11-23 02:06:07,835 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:06:07,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73046403] [2021-11-23 02:06:07,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73046403] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:06:07,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:06:07,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:06:07,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225690745] [2021-11-23 02:06:07,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:06:07,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:06:07,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:06:07,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:06:07,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:06:07,838 INFO L87 Difference]: Start difference. First operand 29346 states and 41260 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) [2021-11-23 02:06:09,231 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:06:12,107 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:06:15,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:15,670 INFO L93 Difference]: Finished difference Result 58718 states and 83200 transitions. [2021-11-23 02:06:15,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:06:15,673 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) Word has length 255 [2021-11-23 02:06:15,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:15,783 INFO L225 Difference]: With dead ends: 58718 [2021-11-23 02:06:15,783 INFO L226 Difference]: Without dead ends: 29388 [2021-11-23 02:06:15,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:06:15,946 INFO L933 BasicCegarLoop]: 2650 mSDtfsCounter, 1 mSDsluCounter, 3007 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 5290 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:15,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 5290 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 743 Invalid, 1 Unknown, 0 Unchecked, 6.0s Time] [2021-11-23 02:06:15,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29388 states. [2021-11-23 02:06:17,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29388 to 29353. [2021-11-23 02:06:17,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29353 states, 16548 states have (on average 1.2506043026347595) internal successors, (20695), 17578 states have internal predecessors, (20695), 9755 states have call successors, (9755), 3257 states have call predecessors, (9755), 3047 states have return successors, (10817), 9243 states have call predecessors, (10817), 9740 states have call successors, (10817) [2021-11-23 02:06:18,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29353 states to 29353 states and 41267 transitions. [2021-11-23 02:06:18,101 INFO L78 Accepts]: Start accepts. Automaton has 29353 states and 41267 transitions. Word has length 255 [2021-11-23 02:06:18,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:18,102 INFO L470 AbstractCegarLoop]: Abstraction has 29353 states and 41267 transitions. [2021-11-23 02:06:18,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) [2021-11-23 02:06:18,103 INFO L276 IsEmpty]: Start isEmpty. Operand 29353 states and 41267 transitions. [2021-11-23 02:06:18,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-11-23 02:06:18,119 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:18,119 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:06:18,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-23 02:06:18,120 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:06:18,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:18,120 INFO L85 PathProgramCache]: Analyzing trace with hash -539359588, now seen corresponding path program 1 times [2021-11-23 02:06:18,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:06:18,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775365388] [2021-11-23 02:06:18,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:18,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:06:18,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:18,863 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2021-11-23 02:06:18,863 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:06:18,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775365388] [2021-11-23 02:06:18,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775365388] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:06:18,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:06:18,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:06:18,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801884352] [2021-11-23 02:06:18,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:06:18,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:06:18,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:06:18,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:06:18,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:06:18,868 INFO L87 Difference]: Start difference. First operand 29353 states and 41267 transitions. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 5 states have internal predecessors, (96), 3 states have call successors, (48), 4 states have call predecessors, (48), 2 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) [2021-11-23 02:06:22,547 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:06:25,548 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:06:39,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:39,523 INFO L93 Difference]: Finished difference Result 29902 states and 41918 transitions. [2021-11-23 02:06:39,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 02:06:39,524 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 5 states have internal predecessors, (96), 3 states have call successors, (48), 4 states have call predecessors, (48), 2 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) Word has length 242 [2021-11-23 02:06:39,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:39,777 INFO L225 Difference]: With dead ends: 29902 [2021-11-23 02:06:39,777 INFO L226 Difference]: Without dead ends: 29900 [2021-11-23 02:06:39,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:06:39,788 INFO L933 BasicCegarLoop]: 2877 mSDtfsCounter, 2892 mSDsluCounter, 6962 mSDsCounter, 0 mSdLazyCounter, 8738 mSolverCounterSat, 2428 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3496 SdHoareTripleChecker+Valid, 8907 SdHoareTripleChecker+Invalid, 11168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2428 IncrementalHoareTripleChecker+Valid, 8738 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:39,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3496 Valid, 8907 Invalid, 11168 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2428 Valid, 8738 Invalid, 2 Unknown, 0 Unchecked, 18.8s Time] [2021-11-23 02:06:39,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29900 states. [2021-11-23 02:06:41,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29900 to 29885. [2021-11-23 02:06:41,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29885 states, 16818 states have (on average 1.249435129028422) internal successors, (21013), 17874 states have internal predecessors, (21013), 9908 states have call successors, (9908), 3258 states have call predecessors, (9908), 3156 states have return successors, (10979), 9493 states have call predecessors, (10979), 9893 states have call successors, (10979) [2021-11-23 02:06:41,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29885 states to 29885 states and 41900 transitions. [2021-11-23 02:06:41,827 INFO L78 Accepts]: Start accepts. Automaton has 29885 states and 41900 transitions. Word has length 242 [2021-11-23 02:06:41,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:41,828 INFO L470 AbstractCegarLoop]: Abstraction has 29885 states and 41900 transitions. [2021-11-23 02:06:41,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 5 states have internal predecessors, (96), 3 states have call successors, (48), 4 states have call predecessors, (48), 2 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) [2021-11-23 02:06:41,828 INFO L276 IsEmpty]: Start isEmpty. Operand 29885 states and 41900 transitions. [2021-11-23 02:06:41,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-11-23 02:06:41,845 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:41,845 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:06:41,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-23 02:06:41,846 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:06:41,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:41,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1286628477, now seen corresponding path program 1 times [2021-11-23 02:06:41,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:06:41,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305454437] [2021-11-23 02:06:41,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:41,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:06:41,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:42,182 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2021-11-23 02:06:42,182 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:06:42,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305454437] [2021-11-23 02:06:42,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305454437] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:06:42,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:06:42,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:06:42,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207205712] [2021-11-23 02:06:42,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:06:42,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:06:42,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:06:42,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:06:42,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:06:42,185 INFO L87 Difference]: Start difference. First operand 29885 states and 41900 transitions. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 4 states have call successors, (51), 3 states have call predecessors, (51), 1 states have return successors, (39), 4 states have call predecessors, (39), 4 states have call successors, (39) [2021-11-23 02:06:44,540 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:06:47,533 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:06:50,329 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:06:56,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:56,475 INFO L93 Difference]: Finished difference Result 60623 states and 85462 transitions. [2021-11-23 02:06:56,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:06:56,478 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 4 states have call successors, (51), 3 states have call predecessors, (51), 1 states have return successors, (39), 4 states have call predecessors, (39), 4 states have call successors, (39) Word has length 254 [2021-11-23 02:06:56,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:56,602 INFO L225 Difference]: With dead ends: 60623 [2021-11-23 02:06:56,602 INFO L226 Difference]: Without dead ends: 30754 [2021-11-23 02:06:56,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:06:56,719 INFO L933 BasicCegarLoop]: 3170 mSDtfsCounter, 2677 mSDsluCounter, 9452 mSDsCounter, 0 mSdLazyCounter, 1496 mSolverCounterSat, 79 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2682 SdHoareTripleChecker+Valid, 11577 SdHoareTripleChecker+Invalid, 1578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1496 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:56,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2682 Valid, 11577 Invalid, 1578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1496 Invalid, 3 Unknown, 0 Unchecked, 12.1s Time] [2021-11-23 02:06:56,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30754 states. [2021-11-23 02:06:58,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30754 to 30232. [2021-11-23 02:06:58,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30232 states, 17049 states have (on average 1.2516276614464192) internal successors, (21339), 18133 states have internal predecessors, (21339), 10021 states have call successors, (10021), 3258 states have call predecessors, (10021), 3159 states have return successors, (11131), 9611 states have call predecessors, (11131), 10006 states have call successors, (11131) [2021-11-23 02:06:59,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30232 states to 30232 states and 42491 transitions. [2021-11-23 02:06:59,071 INFO L78 Accepts]: Start accepts. Automaton has 30232 states and 42491 transitions. Word has length 254 [2021-11-23 02:06:59,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:59,072 INFO L470 AbstractCegarLoop]: Abstraction has 30232 states and 42491 transitions. [2021-11-23 02:06:59,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 4 states have call successors, (51), 3 states have call predecessors, (51), 1 states have return successors, (39), 4 states have call predecessors, (39), 4 states have call successors, (39) [2021-11-23 02:06:59,073 INFO L276 IsEmpty]: Start isEmpty. Operand 30232 states and 42491 transitions. [2021-11-23 02:06:59,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-11-23 02:06:59,095 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:59,096 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-23 02:06:59,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-23 02:06:59,096 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:06:59,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:59,097 INFO L85 PathProgramCache]: Analyzing trace with hash 204020539, now seen corresponding path program 1 times [2021-11-23 02:06:59,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:06:59,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308030380] [2021-11-23 02:06:59,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:59,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:07:00,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:01,229 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 19 proven. 8 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2021-11-23 02:07:01,230 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:07:01,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308030380] [2021-11-23 02:07:01,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308030380] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:07:01,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427245581] [2021-11-23 02:07:01,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:07:01,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:07:01,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152a5c82-6db8-4110-b215-850328e374e6/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:07:01,234 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152a5c82-6db8-4110-b215-850328e374e6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:07:01,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152a5c82-6db8-4110-b215-850328e374e6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:07:03,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:03,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 6476 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 02:07:03,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:07:04,404 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2021-11-23 02:07:04,404 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:07:04,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427245581] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:07:04,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:07:04,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 19 [2021-11-23 02:07:04,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093695667] [2021-11-23 02:07:04,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:07:04,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 02:07:04,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:07:04,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 02:07:04,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-11-23 02:07:04,408 INFO L87 Difference]: Start difference. First operand 30232 states and 42491 transitions. Second operand has 12 states, 8 states have (on average 15.125) internal successors, (121), 10 states have internal predecessors, (121), 5 states have call successors, (57), 2 states have call predecessors, (57), 5 states have return successors, (44), 6 states have call predecessors, (44), 5 states have call successors, (44) [2021-11-23 02:07:07,153 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:07:09,179 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:07:11,209 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:07:13,238 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:07:15,408 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:07:17,429 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:07:19,454 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:07:24,205 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:07:35,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:07:35,781 INFO L93 Difference]: Finished difference Result 63325 states and 89999 transitions. [2021-11-23 02:07:35,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 02:07:35,785 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 8 states have (on average 15.125) internal successors, (121), 10 states have internal predecessors, (121), 5 states have call successors, (57), 2 states have call predecessors, (57), 5 states have return successors, (44), 6 states have call predecessors, (44), 5 states have call successors, (44) Word has length 272 [2021-11-23 02:07:35,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:07:36,096 INFO L225 Difference]: With dead ends: 63325 [2021-11-23 02:07:36,097 INFO L226 Difference]: Without dead ends: 33094 [2021-11-23 02:07:36,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 267 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-11-23 02:07:36,192 INFO L933 BasicCegarLoop]: 2851 mSDtfsCounter, 311 mSDsluCounter, 32021 mSDsCounter, 0 mSdLazyCounter, 5013 mSolverCounterSat, 133 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 30908 SdHoareTripleChecker+Invalid, 5153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 5013 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:07:36,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 30908 Invalid, 5153 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [133 Valid, 5013 Invalid, 7 Unknown, 0 Unchecked, 29.0s Time] [2021-11-23 02:07:36,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33094 states. [2021-11-23 02:07:38,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33094 to 30322. [2021-11-23 02:07:38,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30322 states, 17109 states have (on average 1.2507452218130808) internal successors, (21399), 18193 states have internal predecessors, (21399), 10051 states have call successors, (10051), 3258 states have call predecessors, (10051), 3159 states have return successors, (11161), 9641 states have call predecessors, (11161), 10036 states have call successors, (11161) [2021-11-23 02:07:38,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30322 states to 30322 states and 42611 transitions. [2021-11-23 02:07:38,674 INFO L78 Accepts]: Start accepts. Automaton has 30322 states and 42611 transitions. Word has length 272 [2021-11-23 02:07:38,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:07:38,675 INFO L470 AbstractCegarLoop]: Abstraction has 30322 states and 42611 transitions. [2021-11-23 02:07:38,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 8 states have (on average 15.125) internal successors, (121), 10 states have internal predecessors, (121), 5 states have call successors, (57), 2 states have call predecessors, (57), 5 states have return successors, (44), 6 states have call predecessors, (44), 5 states have call successors, (44) [2021-11-23 02:07:38,675 INFO L276 IsEmpty]: Start isEmpty. Operand 30322 states and 42611 transitions. [2021-11-23 02:07:38,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2021-11-23 02:07:38,693 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:07:38,693 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 9, 9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:07:38,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152a5c82-6db8-4110-b215-850328e374e6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:07:38,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152a5c82-6db8-4110-b215-850328e374e6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-23 02:07:38,907 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:07:38,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:07:38,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1754438984, now seen corresponding path program 1 times [2021-11-23 02:07:38,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:07:38,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825529307] [2021-11-23 02:07:38,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:07:38,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:07:39,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:39,454 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 407 trivial. 0 not checked. [2021-11-23 02:07:39,454 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:07:39,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825529307] [2021-11-23 02:07:39,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825529307] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:07:39,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:07:39,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:07:39,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68025263] [2021-11-23 02:07:39,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:07:39,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:07:39,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:07:39,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:07:39,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:07:39,459 INFO L87 Difference]: Start difference. First operand 30322 states and 42611 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 3 states have call successors, (53), 4 states have call predecessors, (53), 2 states have return successors, (51), 3 states have call predecessors, (51), 3 states have call successors, (51) [2021-11-23 02:07:42,156 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:07:44,557 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:07:58,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:07:58,486 INFO L93 Difference]: Finished difference Result 30583 states and 42872 transitions. [2021-11-23 02:07:58,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 02:07:58,487 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 3 states have call successors, (53), 4 states have call predecessors, (53), 2 states have return successors, (51), 3 states have call predecessors, (51), 3 states have call successors, (51) Word has length 286 [2021-11-23 02:07:58,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:07:58,599 INFO L225 Difference]: With dead ends: 30583 [2021-11-23 02:07:58,599 INFO L226 Difference]: Without dead ends: 30483 [2021-11-23 02:07:58,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:07:58,613 INFO L933 BasicCegarLoop]: 3090 mSDtfsCounter, 5194 mSDsluCounter, 7940 mSDsCounter, 0 mSdLazyCounter, 5143 mSolverCounterSat, 2050 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5718 SdHoareTripleChecker+Valid, 10025 SdHoareTripleChecker+Invalid, 7195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2050 IncrementalHoareTripleChecker+Valid, 5143 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:07:58,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5718 Valid, 10025 Invalid, 7195 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2050 Valid, 5143 Invalid, 2 Unknown, 0 Unchecked, 17.0s Time] [2021-11-23 02:07:58,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30483 states. [2021-11-23 02:08:00,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30483 to 30428. [2021-11-23 02:08:00,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30428 states, 17175 states have (on average 1.2492576419213974) internal successors, (21456), 18255 states have internal predecessors, (21456), 10067 states have call successors, (10067), 3284 states have call predecessors, (10067), 3183 states have return successors, (11169), 9659 states have call predecessors, (11169), 10046 states have call successors, (11169) [2021-11-23 02:08:00,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30428 states to 30428 states and 42692 transitions. [2021-11-23 02:08:00,872 INFO L78 Accepts]: Start accepts. Automaton has 30428 states and 42692 transitions. Word has length 286 [2021-11-23 02:08:00,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:08:00,873 INFO L470 AbstractCegarLoop]: Abstraction has 30428 states and 42692 transitions. [2021-11-23 02:08:00,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 3 states have call successors, (53), 4 states have call predecessors, (53), 2 states have return successors, (51), 3 states have call predecessors, (51), 3 states have call successors, (51) [2021-11-23 02:08:00,873 INFO L276 IsEmpty]: Start isEmpty. Operand 30428 states and 42692 transitions. [2021-11-23 02:08:00,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2021-11-23 02:08:00,896 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:08:00,896 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-23 02:08:00,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-23 02:08:00,897 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:08:00,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:08:00,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1161878146, now seen corresponding path program 1 times [2021-11-23 02:08:00,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:08:00,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836590213] [2021-11-23 02:08:00,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:08:00,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:08:01,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:08:01,488 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2021-11-23 02:08:01,489 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:08:01,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836590213] [2021-11-23 02:08:01,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836590213] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:08:01,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:08:01,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:08:01,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885876954] [2021-11-23 02:08:01,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:08:01,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:08:01,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:08:01,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:08:01,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:08:01,492 INFO L87 Difference]: Start difference. First operand 30428 states and 42692 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 2 states have call successors, (54), 2 states have call predecessors, (54), 2 states have return successors, (48), 2 states have call predecessors, (48), 2 states have call successors, (48) [2021-11-23 02:08:03,900 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:08:09,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:08:09,173 INFO L93 Difference]: Finished difference Result 60808 states and 85380 transitions. [2021-11-23 02:08:09,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:08:09,176 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 2 states have call successors, (54), 2 states have call predecessors, (54), 2 states have return successors, (48), 2 states have call predecessors, (48), 2 states have call successors, (48) Word has length 285 [2021-11-23 02:08:09,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:08:09,300 INFO L225 Difference]: With dead ends: 60808 [2021-11-23 02:08:09,300 INFO L226 Difference]: Without dead ends: 30396 [2021-11-23 02:08:09,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:08:09,574 INFO L933 BasicCegarLoop]: 2649 mSDtfsCounter, 8 mSDsluCounter, 2999 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 5289 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:08:09,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 5289 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 742 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2021-11-23 02:08:09,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30396 states. [2021-11-23 02:08:11,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30396 to 30386. [2021-11-23 02:08:11,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30386 states, 17152 states have (on average 1.2491254664179106) internal successors, (21425), 18228 states have internal predecessors, (21425), 10053 states have call successors, (10053), 3278 states have call predecessors, (10053), 3178 states have return successors, (11140), 9649 states have call predecessors, (11140), 10032 states have call successors, (11140) [2021-11-23 02:08:12,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30386 states to 30386 states and 42618 transitions. [2021-11-23 02:08:12,061 INFO L78 Accepts]: Start accepts. Automaton has 30386 states and 42618 transitions. Word has length 285 [2021-11-23 02:08:12,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:08:12,061 INFO L470 AbstractCegarLoop]: Abstraction has 30386 states and 42618 transitions. [2021-11-23 02:08:12,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 2 states have call successors, (54), 2 states have call predecessors, (54), 2 states have return successors, (48), 2 states have call predecessors, (48), 2 states have call successors, (48) [2021-11-23 02:08:12,062 INFO L276 IsEmpty]: Start isEmpty. Operand 30386 states and 42618 transitions. [2021-11-23 02:08:12,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2021-11-23 02:08:12,075 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:08:12,075 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 11, 11, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:08:12,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-23 02:08:12,076 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:08:12,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:08:12,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1491989924, now seen corresponding path program 1 times [2021-11-23 02:08:12,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:08:12,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575720028] [2021-11-23 02:08:12,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:08:12,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:08:12,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:08:12,566 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 591 trivial. 0 not checked. [2021-11-23 02:08:12,567 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:08:12,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575720028] [2021-11-23 02:08:12,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575720028] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:08:12,567 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:08:12,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:08:12,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278893205] [2021-11-23 02:08:12,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:08:12,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:08:12,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:08:12,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:08:12,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:08:12,570 INFO L87 Difference]: Start difference. First operand 30386 states and 42618 transitions. Second operand has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 5 states have internal predecessors, (89), 3 states have call successors, (57), 4 states have call predecessors, (57), 2 states have return successors, (55), 3 states have call predecessors, (55), 3 states have call successors, (55) [2021-11-23 02:08:15,105 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:08:18,227 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:08:21,142 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:08:27,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:08:27,915 INFO L93 Difference]: Finished difference Result 30422 states and 42651 transitions. [2021-11-23 02:08:27,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:08:27,918 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 5 states have internal predecessors, (89), 3 states have call successors, (57), 4 states have call predecessors, (57), 2 states have return successors, (55), 3 states have call predecessors, (55), 3 states have call successors, (55) Word has length 303 [2021-11-23 02:08:27,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:08:28,126 INFO L225 Difference]: With dead ends: 30422 [2021-11-23 02:08:28,126 INFO L226 Difference]: Without dead ends: 30222 [2021-11-23 02:08:28,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:08:28,137 INFO L933 BasicCegarLoop]: 2643 mSDtfsCounter, 2957 mSDsluCounter, 6216 mSDsCounter, 0 mSdLazyCounter, 2237 mSolverCounterSat, 243 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3074 SdHoareTripleChecker+Valid, 8108 SdHoareTripleChecker+Invalid, 2483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 2237 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:08:28,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3074 Valid, 8108 Invalid, 2483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 2237 Invalid, 3 Unknown, 0 Unchecked, 13.3s Time] [2021-11-23 02:08:28,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30222 states. [2021-11-23 02:08:30,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30222 to 30070. [2021-11-23 02:08:30,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30070 states, 16969 states have (on average 1.2510460251046025) internal successors, (21229), 18041 states have internal predecessors, (21229), 9973 states have call successors, (9973), 3221 states have call predecessors, (9973), 3125 states have return successors, (11072), 9577 states have call predecessors, (11072), 9964 states have call successors, (11072) [2021-11-23 02:08:30,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30070 states to 30070 states and 42274 transitions. [2021-11-23 02:08:30,404 INFO L78 Accepts]: Start accepts. Automaton has 30070 states and 42274 transitions. Word has length 303 [2021-11-23 02:08:30,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:08:30,404 INFO L470 AbstractCegarLoop]: Abstraction has 30070 states and 42274 transitions. [2021-11-23 02:08:30,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 5 states have internal predecessors, (89), 3 states have call successors, (57), 4 states have call predecessors, (57), 2 states have return successors, (55), 3 states have call predecessors, (55), 3 states have call successors, (55) [2021-11-23 02:08:30,405 INFO L276 IsEmpty]: Start isEmpty. Operand 30070 states and 42274 transitions. [2021-11-23 02:08:30,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2021-11-23 02:08:30,421 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:08:30,421 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:08:30,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-23 02:08:30,421 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:08:30,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:08:30,422 INFO L85 PathProgramCache]: Analyzing trace with hash 75430289, now seen corresponding path program 1 times [2021-11-23 02:08:30,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:08:30,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110643507] [2021-11-23 02:08:30,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:08:30,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:08:30,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:08:30,818 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-11-23 02:08:30,818 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:08:30,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110643507] [2021-11-23 02:08:30,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110643507] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:08:30,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:08:30,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:08:30,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823214354] [2021-11-23 02:08:30,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:08:30,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:08:30,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:08:30,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:08:30,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:08:30,822 INFO L87 Difference]: Start difference. First operand 30070 states and 42274 transitions. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 5 states have internal predecessors, (128), 2 states have call successors, (59), 2 states have call predecessors, (59), 2 states have return successors, (47), 3 states have call predecessors, (47), 2 states have call successors, (47) [2021-11-23 02:08:33,401 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:08:35,579 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:08:37,603 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:08:39,986 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:08:47,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:08:47,389 INFO L93 Difference]: Finished difference Result 61464 states and 87046 transitions. [2021-11-23 02:08:47,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:08:47,392 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 5 states have internal predecessors, (128), 2 states have call successors, (59), 2 states have call predecessors, (59), 2 states have return successors, (47), 3 states have call predecessors, (47), 2 states have call successors, (47) Word has length 313 [2021-11-23 02:08:47,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:08:47,521 INFO L225 Difference]: With dead ends: 61464 [2021-11-23 02:08:47,521 INFO L226 Difference]: Without dead ends: 31410 [2021-11-23 02:08:47,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:08:47,618 INFO L933 BasicCegarLoop]: 2853 mSDtfsCounter, 382 mSDsluCounter, 12476 mSDsCounter, 0 mSdLazyCounter, 1942 mSolverCounterSat, 4 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 13824 SdHoareTripleChecker+Invalid, 1949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1942 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:08:47,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [553 Valid, 13824 Invalid, 1949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1942 Invalid, 3 Unknown, 0 Unchecked, 14.2s Time] [2021-11-23 02:08:47,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31410 states. [2021-11-23 02:08:49,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31410 to 29111. [2021-11-23 02:08:49,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29111 states, 16376 states have (on average 1.2494504152418173) internal successors, (20461), 17392 states have internal predecessors, (20461), 9646 states have call successors, (9646), 3181 states have call predecessors, (9646), 3086 states have return successors, (10652), 9264 states have call predecessors, (10652), 9637 states have call successors, (10652) [2021-11-23 02:08:49,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29111 states to 29111 states and 40759 transitions. [2021-11-23 02:08:49,870 INFO L78 Accepts]: Start accepts. Automaton has 29111 states and 40759 transitions. Word has length 313 [2021-11-23 02:08:49,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:08:49,870 INFO L470 AbstractCegarLoop]: Abstraction has 29111 states and 40759 transitions. [2021-11-23 02:08:49,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 5 states have internal predecessors, (128), 2 states have call successors, (59), 2 states have call predecessors, (59), 2 states have return successors, (47), 3 states have call predecessors, (47), 2 states have call successors, (47) [2021-11-23 02:08:49,871 INFO L276 IsEmpty]: Start isEmpty. Operand 29111 states and 40759 transitions. [2021-11-23 02:08:49,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2021-11-23 02:08:49,878 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:08:49,879 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:08:49,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-23 02:08:49,879 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:08:49,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:08:49,880 INFO L85 PathProgramCache]: Analyzing trace with hash 2016693742, now seen corresponding path program 1 times [2021-11-23 02:08:49,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:08:49,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779028076] [2021-11-23 02:08:49,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:08:49,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:08:50,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:08:50,498 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2021-11-23 02:08:50,499 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:08:50,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779028076] [2021-11-23 02:08:50,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779028076] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:08:50,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815758207] [2021-11-23 02:08:50,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:08:50,500 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:08:50,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152a5c82-6db8-4110-b215-850328e374e6/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:08:50,503 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152a5c82-6db8-4110-b215-850328e374e6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:08:50,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152a5c82-6db8-4110-b215-850328e374e6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:08:52,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:08:52,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 6655 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 02:08:52,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:08:52,997 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 168 proven. 39 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2021-11-23 02:08:52,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:08:54,019 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2021-11-23 02:08:54,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815758207] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:08:54,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [396042208] [2021-11-23 02:08:54,074 INFO L159 IcfgInterpreter]: Started Sifa with 221 locations of interest [2021-11-23 02:08:54,074 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:08:54,085 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:08:54,092 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:08:54,092 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs