./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-calxeda-xgmac.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bbbd46e-8056-4c54-a271-952b4d3fb15a/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bbbd46e-8056-4c54-a271-952b4d3fb15a/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bbbd46e-8056-4c54-a271-952b4d3fb15a/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bbbd46e-8056-4c54-a271-952b4d3fb15a/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-calxeda-xgmac.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bbbd46e-8056-4c54-a271-952b4d3fb15a/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bbbd46e-8056-4c54-a271-952b4d3fb15a/bin/utaipan-Q6hlc19bkW --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 3fe54d83d46de95e8e0767545626d085bd64ef94fa067827f6d89c4bc8eb39d0 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 15:21:06,211 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:21:06,214 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:21:06,261 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:21:06,262 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:21:06,266 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:21:06,269 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:21:06,273 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:21:06,275 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:21:06,281 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:21:06,283 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:21:06,285 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:21:06,286 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:21:06,289 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:21:06,292 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:21:06,296 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:21:06,297 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:21:06,298 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:21:06,300 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:21:06,307 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:21:06,309 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:21:06,312 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:21:06,314 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:21:06,315 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:21:06,326 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:21:06,327 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:21:06,327 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:21:06,330 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:21:06,330 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:21:06,332 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:21:06,332 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:21:06,333 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:21:06,336 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:21:06,338 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:21:06,339 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:21:06,339 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:21:06,340 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:21:06,340 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:21:06,341 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:21:06,343 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:21:06,344 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:21:06,345 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bbbd46e-8056-4c54-a271-952b4d3fb15a/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-23 15:21:06,391 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:21:06,392 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:21:06,393 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:21:06,393 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:21:06,394 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:21:06,395 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:21:06,395 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:21:06,395 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:21:06,396 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:21:06,396 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:21:06,397 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:21:06,398 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:21:06,398 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:21:06,398 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:21:06,399 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:21:06,399 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:21:06,400 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:21:06,400 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:21:06,401 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:21:06,401 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:21:06,401 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:21:06,402 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:21:06,402 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:21:06,402 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:21:06,403 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:21:06,403 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:21:06,404 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:21:06,404 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:21:06,405 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:21:06,405 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:21:06,405 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:21:06,406 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:21:06,406 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:21:06,406 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:21:06,407 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:21:06,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:21:06,407 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:21:06,407 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:21:06,408 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bbbd46e-8056-4c54-a271-952b4d3fb15a/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bbbd46e-8056-4c54-a271-952b4d3fb15a/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3fe54d83d46de95e8e0767545626d085bd64ef94fa067827f6d89c4bc8eb39d0 [2022-11-23 15:21:06,769 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:21:06,804 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:21:06,808 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:21:06,810 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:21:06,810 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:21:06,812 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bbbd46e-8056-4c54-a271-952b4d3fb15a/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-calxeda-xgmac.cil.i [2022-11-23 15:21:09,924 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:21:10,642 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:21:10,643 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bbbd46e-8056-4c54-a271-952b4d3fb15a/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-calxeda-xgmac.cil.i [2022-11-23 15:21:10,706 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bbbd46e-8056-4c54-a271-952b4d3fb15a/bin/utaipan-Q6hlc19bkW/data/ed1fedfb5/a75bbdea69d4477a8dde7b4ffb071ae2/FLAG3648971c9 [2022-11-23 15:21:10,721 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bbbd46e-8056-4c54-a271-952b4d3fb15a/bin/utaipan-Q6hlc19bkW/data/ed1fedfb5/a75bbdea69d4477a8dde7b4ffb071ae2 [2022-11-23 15:21:10,724 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:21:10,726 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:21:10,727 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:21:10,727 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:21:10,731 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:21:10,732 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:21:10" (1/1) ... [2022-11-23 15:21:10,733 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23284c85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:10, skipping insertion in model container [2022-11-23 15:21:10,733 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:21:10" (1/1) ... [2022-11-23 15:21:10,741 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:21:10,865 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:21:14,280 WARN L237 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_7bbbd46e-8056-4c54-a271-952b4d3fb15a/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-calxeda-xgmac.cil.i[358326,358339] [2022-11-23 15:21:14,287 WARN L237 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_7bbbd46e-8056-4c54-a271-952b4d3fb15a/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-calxeda-xgmac.cil.i[358495,358508] [2022-11-23 15:21:14,287 WARN L237 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_7bbbd46e-8056-4c54-a271-952b4d3fb15a/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-calxeda-xgmac.cil.i[358662,358675] [2022-11-23 15:21:14,289 WARN L237 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_7bbbd46e-8056-4c54-a271-952b4d3fb15a/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-calxeda-xgmac.cil.i[358830,358843] [2022-11-23 15:21:14,318 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:21:14,403 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:21:14,852 WARN L237 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_7bbbd46e-8056-4c54-a271-952b4d3fb15a/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-calxeda-xgmac.cil.i[358326,358339] [2022-11-23 15:21:14,853 WARN L237 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_7bbbd46e-8056-4c54-a271-952b4d3fb15a/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-calxeda-xgmac.cil.i[358495,358508] [2022-11-23 15:21:14,853 WARN L237 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_7bbbd46e-8056-4c54-a271-952b4d3fb15a/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-calxeda-xgmac.cil.i[358662,358675] [2022-11-23 15:21:14,854 WARN L237 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_7bbbd46e-8056-4c54-a271-952b4d3fb15a/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-calxeda-xgmac.cil.i[358830,358843] [2022-11-23 15:21:14,862 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:21:15,158 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:21:15,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:15 WrapperNode [2022-11-23 15:21:15,159 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:21:15,160 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:21:15,161 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:21:15,161 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:21:15,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:15" (1/1) ... [2022-11-23 15:21:15,282 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:15" (1/1) ... [2022-11-23 15:21:15,498 INFO L138 Inliner]: procedures = 502, calls = 2414, calls flagged for inlining = 253, calls inlined = 226, statements flattened = 5432 [2022-11-23 15:21:15,498 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:21:15,499 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:21:15,499 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:21:15,500 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:21:15,510 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:15" (1/1) ... [2022-11-23 15:21:15,510 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:15" (1/1) ... [2022-11-23 15:21:15,565 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:15" (1/1) ... [2022-11-23 15:21:15,565 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:15" (1/1) ... [2022-11-23 15:21:15,673 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:15" (1/1) ... [2022-11-23 15:21:15,689 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:15" (1/1) ... [2022-11-23 15:21:15,712 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:15" (1/1) ... [2022-11-23 15:21:15,728 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:15" (1/1) ... [2022-11-23 15:21:15,786 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:21:15,787 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:21:15,787 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:21:15,787 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:21:15,788 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:15" (1/1) ... [2022-11-23 15:21:15,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:21:15,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bbbd46e-8056-4c54-a271-952b4d3fb15a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:21:15,823 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bbbd46e-8056-4c54-a271-952b4d3fb15a/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:21:15,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bbbd46e-8056-4c54-a271-952b4d3fb15a/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:21:15,863 INFO L130 BoogieDeclarations]: Found specification of procedure device_set_wakeup_enable [2022-11-23 15:21:15,864 INFO L138 BoogieDeclarations]: Found implementation of procedure device_set_wakeup_enable [2022-11-23 15:21:15,864 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-23 15:21:15,864 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-23 15:21:15,864 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_automaton_state_0_6 [2022-11-23 15:21:15,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_automaton_state_0_6 [2022-11-23 15:21:15,864 INFO L130 BoogieDeclarations]: Found specification of procedure desc_set_buf_addr [2022-11-23 15:21:15,864 INFO L138 BoogieDeclarations]: Found implementation of procedure desc_set_buf_addr [2022-11-23 15:21:15,865 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2022-11-23 15:21:15,865 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2022-11-23 15:21:15,865 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-23 15:21:15,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-23 15:21:15,865 INFO L130 BoogieDeclarations]: Found specification of procedure xgmac_interrupt [2022-11-23 15:21:15,865 INFO L138 BoogieDeclarations]: Found implementation of procedure xgmac_interrupt [2022-11-23 15:21:15,866 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2022-11-23 15:21:15,866 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2022-11-23 15:21:15,866 INFO L130 BoogieDeclarations]: Found specification of procedure xgmac_rx_refill [2022-11-23 15:21:15,866 INFO L138 BoogieDeclarations]: Found implementation of procedure xgmac_rx_refill [2022-11-23 15:21:15,866 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2022-11-23 15:21:15,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2022-11-23 15:21:15,867 INFO L130 BoogieDeclarations]: Found specification of procedure netif_napi_del [2022-11-23 15:21:15,867 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_napi_del [2022-11-23 15:21:15,867 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2022-11-23 15:21:15,867 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2022-11-23 15:21:15,867 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2022-11-23 15:21:15,867 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2022-11-23 15:21:15,868 INFO L130 BoogieDeclarations]: Found specification of procedure xgmac_poll_controller [2022-11-23 15:21:15,868 INFO L138 BoogieDeclarations]: Found implementation of procedure xgmac_poll_controller [2022-11-23 15:21:15,868 INFO L130 BoogieDeclarations]: Found specification of procedure crc32_le [2022-11-23 15:21:15,868 INFO L138 BoogieDeclarations]: Found implementation of procedure crc32_le [2022-11-23 15:21:15,868 INFO L130 BoogieDeclarations]: Found specification of procedure xgmac_set_mac_addr [2022-11-23 15:21:15,868 INFO L138 BoogieDeclarations]: Found implementation of procedure xgmac_set_mac_addr [2022-11-23 15:21:15,869 INFO L130 BoogieDeclarations]: Found specification of procedure __netif_tx_unlock [2022-11-23 15:21:15,869 INFO L138 BoogieDeclarations]: Found implementation of procedure __netif_tx_unlock [2022-11-23 15:21:15,869 INFO L130 BoogieDeclarations]: Found specification of procedure xgmac_tx_timeout [2022-11-23 15:21:15,869 INFO L138 BoogieDeclarations]: Found implementation of procedure xgmac_tx_timeout [2022-11-23 15:21:15,869 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2022-11-23 15:21:15,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2022-11-23 15:21:15,869 INFO L130 BoogieDeclarations]: Found specification of procedure skb_end_pointer [2022-11-23 15:21:15,870 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_end_pointer [2022-11-23 15:21:15,870 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2022-11-23 15:21:15,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2022-11-23 15:21:15,870 INFO L130 BoogieDeclarations]: Found specification of procedure platform_get_resource [2022-11-23 15:21:15,870 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_get_resource [2022-11-23 15:21:15,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 15:21:15,871 INFO L130 BoogieDeclarations]: Found specification of procedure iounmap [2022-11-23 15:21:15,871 INFO L138 BoogieDeclarations]: Found implementation of procedure iounmap [2022-11-23 15:21:15,871 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-11-23 15:21:15,871 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-11-23 15:21:15,871 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2022-11-23 15:21:15,871 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2022-11-23 15:21:15,872 INFO L130 BoogieDeclarations]: Found specification of procedure desc_set_buf_addr_and_size [2022-11-23 15:21:15,872 INFO L138 BoogieDeclarations]: Found implementation of procedure desc_set_buf_addr_and_size [2022-11-23 15:21:15,872 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-23 15:21:15,872 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2022-11-23 15:21:15,872 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2022-11-23 15:21:15,872 INFO L130 BoogieDeclarations]: Found specification of procedure xgmac_probe [2022-11-23 15:21:15,872 INFO L138 BoogieDeclarations]: Found implementation of procedure xgmac_probe [2022-11-23 15:21:15,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-23 15:21:15,873 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2022-11-23 15:21:15,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2022-11-23 15:21:15,873 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 15:21:15,873 INFO L130 BoogieDeclarations]: Found specification of procedure desc_set_buf_len [2022-11-23 15:21:15,873 INFO L138 BoogieDeclarations]: Found implementation of procedure desc_set_buf_len [2022-11-23 15:21:15,874 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2022-11-23 15:21:15,874 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2022-11-23 15:21:15,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-23 15:21:15,874 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-23 15:21:15,874 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_interrupt_context [2022-11-23 15:21:15,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_interrupt_context [2022-11-23 15:21:15,874 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2022-11-23 15:21:15,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2022-11-23 15:21:15,875 INFO L130 BoogieDeclarations]: Found specification of procedure xgmac_suspend [2022-11-23 15:21:15,875 INFO L138 BoogieDeclarations]: Found implementation of procedure xgmac_suspend [2022-11-23 15:21:15,875 INFO L130 BoogieDeclarations]: Found specification of procedure __netif_tx_lock [2022-11-23 15:21:15,875 INFO L138 BoogieDeclarations]: Found implementation of procedure __netif_tx_lock [2022-11-23 15:21:15,875 INFO L130 BoogieDeclarations]: Found specification of procedure xgmac_open [2022-11-23 15:21:15,876 INFO L138 BoogieDeclarations]: Found implementation of procedure xgmac_open [2022-11-23 15:21:15,876 INFO L130 BoogieDeclarations]: Found specification of procedure desc_get_buf_len [2022-11-23 15:21:15,876 INFO L138 BoogieDeclarations]: Found implementation of procedure desc_get_buf_len [2022-11-23 15:21:15,876 INFO L130 BoogieDeclarations]: Found specification of procedure napi_enable [2022-11-23 15:21:15,876 INFO L138 BoogieDeclarations]: Found implementation of procedure napi_enable [2022-11-23 15:21:15,876 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2022-11-23 15:21:15,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2022-11-23 15:21:15,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 15:21:15,877 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_1 [2022-11-23 15:21:15,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_1 [2022-11-23 15:21:15,877 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_2 [2022-11-23 15:21:15,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_2 [2022-11-23 15:21:15,877 INFO L130 BoogieDeclarations]: Found specification of procedure dma_map_single_attrs [2022-11-23 15:21:15,878 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_map_single_attrs [2022-11-23 15:21:15,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:21:15,878 INFO L130 BoogieDeclarations]: Found specification of procedure xgmac_pmt [2022-11-23 15:21:15,878 INFO L138 BoogieDeclarations]: Found implementation of procedure xgmac_pmt [2022-11-23 15:21:15,878 INFO L130 BoogieDeclarations]: Found specification of procedure is_valid_ether_addr [2022-11-23 15:21:15,878 INFO L138 BoogieDeclarations]: Found implementation of procedure is_valid_ether_addr [2022-11-23 15:21:15,879 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2022-11-23 15:21:15,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2022-11-23 15:21:15,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 15:21:15,879 INFO L130 BoogieDeclarations]: Found specification of procedure xgmac_free_tx_skbufs [2022-11-23 15:21:15,879 INFO L138 BoogieDeclarations]: Found implementation of procedure xgmac_free_tx_skbufs [2022-11-23 15:21:15,879 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-11-23 15:21:15,879 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-11-23 15:21:15,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-11-23 15:21:15,880 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2022-11-23 15:21:15,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2022-11-23 15:21:15,880 INFO L130 BoogieDeclarations]: Found specification of procedure platform_get_drvdata [2022-11-23 15:21:15,880 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_get_drvdata [2022-11-23 15:21:15,880 INFO L130 BoogieDeclarations]: Found specification of procedure debug_dma_map_page [2022-11-23 15:21:15,881 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_dma_map_page [2022-11-23 15:21:15,881 INFO L130 BoogieDeclarations]: Found specification of procedure napi_disable [2022-11-23 15:21:15,881 INFO L138 BoogieDeclarations]: Found implementation of procedure napi_disable [2022-11-23 15:21:15,881 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2022-11-23 15:21:15,881 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2022-11-23 15:21:15,881 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2022-11-23 15:21:15,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2022-11-23 15:21:15,882 INFO L130 BoogieDeclarations]: Found specification of procedure device_can_wakeup [2022-11-23 15:21:15,882 INFO L138 BoogieDeclarations]: Found implementation of procedure device_can_wakeup [2022-11-23 15:21:15,882 INFO L130 BoogieDeclarations]: Found specification of procedure dev_name [2022-11-23 15:21:15,882 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_name [2022-11-23 15:21:15,882 INFO L130 BoogieDeclarations]: Found specification of procedure writel [2022-11-23 15:21:15,882 INFO L138 BoogieDeclarations]: Found implementation of procedure writel [2022-11-23 15:21:15,883 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2022-11-23 15:21:15,883 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2022-11-23 15:21:15,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:21:15,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:21:15,883 INFO L130 BoogieDeclarations]: Found specification of procedure xgmac_mac_disable [2022-11-23 15:21:15,883 INFO L138 BoogieDeclarations]: Found implementation of procedure xgmac_mac_disable [2022-11-23 15:21:15,883 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-23 15:21:15,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-23 15:21:15,884 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-23 15:21:15,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-23 15:21:15,884 INFO L130 BoogieDeclarations]: Found specification of procedure desc_init_tx_desc [2022-11-23 15:21:15,884 INFO L138 BoogieDeclarations]: Found implementation of procedure desc_init_tx_desc [2022-11-23 15:21:15,884 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~int~X~int~X~$Pointer$~TO~~dma_addr_t~0 [2022-11-23 15:21:15,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~int~X~int~X~$Pointer$~TO~~dma_addr_t~0 [2022-11-23 15:21:15,885 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2022-11-23 15:21:15,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2022-11-23 15:21:15,885 INFO L130 BoogieDeclarations]: Found specification of procedure request_irq [2022-11-23 15:21:15,885 INFO L138 BoogieDeclarations]: Found implementation of procedure request_irq [2022-11-23 15:21:15,885 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_size_call_parameter [2022-11-23 15:21:15,885 INFO L130 BoogieDeclarations]: Found specification of procedure kmemcheck_mark_initialized [2022-11-23 15:21:15,885 INFO L138 BoogieDeclarations]: Found implementation of procedure kmemcheck_mark_initialized [2022-11-23 15:21:15,886 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_process_context [2022-11-23 15:21:15,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_process_context [2022-11-23 15:21:15,886 INFO L130 BoogieDeclarations]: Found specification of procedure bitrev32 [2022-11-23 15:21:15,886 INFO L138 BoogieDeclarations]: Found implementation of procedure bitrev32 [2022-11-23 15:21:15,886 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-23 15:21:15,886 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-23 15:21:15,886 INFO L130 BoogieDeclarations]: Found specification of procedure __netif_schedule [2022-11-23 15:21:15,887 INFO L138 BoogieDeclarations]: Found implementation of procedure __netif_schedule [2022-11-23 15:21:15,887 INFO L130 BoogieDeclarations]: Found specification of procedure debug_dma_unmap_page [2022-11-23 15:21:15,887 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_dma_unmap_page [2022-11-23 15:21:15,887 INFO L130 BoogieDeclarations]: Found specification of procedure dma_unmap_single_attrs [2022-11-23 15:21:15,887 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_unmap_single_attrs [2022-11-23 15:21:15,887 INFO L130 BoogieDeclarations]: Found specification of procedure xgmac_mac_enable [2022-11-23 15:21:15,888 INFO L138 BoogieDeclarations]: Found implementation of procedure xgmac_mac_enable [2022-11-23 15:21:15,888 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2022-11-23 15:21:15,888 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2022-11-23 15:21:15,888 INFO L130 BoogieDeclarations]: Found specification of procedure netif_start_queue [2022-11-23 15:21:15,888 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_start_queue [2022-11-23 15:21:15,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 15:21:15,888 INFO L130 BoogieDeclarations]: Found specification of procedure xgmac_stop [2022-11-23 15:21:15,889 INFO L138 BoogieDeclarations]: Found implementation of procedure xgmac_stop [2022-11-23 15:21:15,889 INFO L130 BoogieDeclarations]: Found specification of procedure desc_set_tx_owner [2022-11-23 15:21:15,889 INFO L138 BoogieDeclarations]: Found implementation of procedure desc_set_tx_owner [2022-11-23 15:21:15,889 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2022-11-23 15:21:15,889 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2022-11-23 15:21:15,889 INFO L130 BoogieDeclarations]: Found specification of procedure platform_get_irq [2022-11-23 15:21:15,889 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_get_irq [2022-11-23 15:21:15,889 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 15:21:15,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-23 15:21:15,890 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2022-11-23 15:21:15,890 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2022-11-23 15:21:15,890 INFO L130 BoogieDeclarations]: Found specification of procedure dma_mapping_error [2022-11-23 15:21:15,890 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_mapping_error [2022-11-23 15:21:15,890 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-11-23 15:21:15,891 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-11-23 15:21:15,891 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_request_irq [2022-11-23 15:21:15,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_request_irq [2022-11-23 15:21:15,891 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2022-11-23 15:21:15,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2022-11-23 15:21:15,891 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_irq [2022-11-23 15:21:15,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_irq [2022-11-23 15:21:15,892 INFO L130 BoogieDeclarations]: Found specification of procedure xgmac_set_flow_ctrl [2022-11-23 15:21:15,892 INFO L138 BoogieDeclarations]: Found implementation of procedure xgmac_set_flow_ctrl [2022-11-23 15:21:15,892 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-11-23 15:21:15,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-11-23 15:21:15,892 INFO L130 BoogieDeclarations]: Found specification of procedure xgmac_resume [2022-11-23 15:21:15,892 INFO L138 BoogieDeclarations]: Found implementation of procedure xgmac_resume [2022-11-23 15:21:15,892 INFO L130 BoogieDeclarations]: Found specification of procedure dma_free_attrs [2022-11-23 15:21:15,893 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_free_attrs [2022-11-23 15:21:15,893 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2022-11-23 15:21:15,893 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2022-11-23 15:21:15,893 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2022-11-23 15:21:15,893 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2022-11-23 15:21:15,893 INFO L130 BoogieDeclarations]: Found specification of procedure irq_set_irq_wake [2022-11-23 15:21:15,893 INFO L138 BoogieDeclarations]: Found implementation of procedure irq_set_irq_wake [2022-11-23 15:21:15,894 INFO L130 BoogieDeclarations]: Found specification of procedure desc_get_tx_fs [2022-11-23 15:21:15,894 INFO L138 BoogieDeclarations]: Found implementation of procedure desc_get_tx_fs [2022-11-23 15:21:15,894 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-11-23 15:21:15,894 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-11-23 15:21:15,894 INFO L130 BoogieDeclarations]: Found specification of procedure xgmac_set_rx_mode [2022-11-23 15:21:15,894 INFO L138 BoogieDeclarations]: Found implementation of procedure xgmac_set_rx_mode [2022-11-23 15:21:15,894 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2022-11-23 15:21:15,895 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2022-11-23 15:21:15,895 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-23 15:21:15,895 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-23 15:21:15,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 15:21:15,895 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-23 15:21:15,895 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-23 15:21:15,895 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~$Pointer$~TO~int [2022-11-23 15:21:15,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~$Pointer$~TO~int [2022-11-23 15:21:15,896 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2022-11-23 15:21:15,896 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2022-11-23 15:21:15,896 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_any [2022-11-23 15:21:15,896 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_any [2022-11-23 15:21:15,896 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_stop_queue [2022-11-23 15:21:15,896 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_stop_queue [2022-11-23 15:21:15,896 INFO L130 BoogieDeclarations]: Found specification of procedure __readl [2022-11-23 15:21:15,896 INFO L138 BoogieDeclarations]: Found implementation of procedure __readl [2022-11-23 15:21:15,896 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2022-11-23 15:21:15,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2022-11-23 15:21:15,897 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_work [2022-11-23 15:21:15,897 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_work [2022-11-23 15:21:15,897 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~X~$Pointer$~TO~VOID [2022-11-23 15:21:15,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~X~$Pointer$~TO~VOID [2022-11-23 15:21:15,897 INFO L130 BoogieDeclarations]: Found specification of procedure __writel [2022-11-23 15:21:15,897 INFO L138 BoogieDeclarations]: Found implementation of procedure __writel [2022-11-23 15:21:15,897 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_automaton_state_1_6 [2022-11-23 15:21:15,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_automaton_state_1_6 [2022-11-23 15:21:15,897 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2022-11-23 15:21:15,898 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2022-11-23 15:21:15,898 INFO L130 BoogieDeclarations]: Found specification of procedure dma_alloc_attrs [2022-11-23 15:21:15,898 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_alloc_attrs [2022-11-23 15:21:15,898 INFO L130 BoogieDeclarations]: Found specification of procedure readl [2022-11-23 15:21:15,898 INFO L138 BoogieDeclarations]: Found implementation of procedure readl [2022-11-23 15:21:15,898 INFO L130 BoogieDeclarations]: Found specification of procedure xgmac_remove [2022-11-23 15:21:15,898 INFO L138 BoogieDeclarations]: Found implementation of procedure xgmac_remove [2022-11-23 15:21:15,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:21:15,898 INFO L130 BoogieDeclarations]: Found specification of procedure desc_get_buf_addr [2022-11-23 15:21:15,898 INFO L138 BoogieDeclarations]: Found implementation of procedure desc_get_buf_addr [2022-11-23 15:21:15,898 INFO L130 BoogieDeclarations]: Found specification of procedure dma_unmap_page [2022-11-23 15:21:15,899 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_unmap_page [2022-11-23 15:21:15,899 INFO L130 BoogieDeclarations]: Found specification of procedure resource_size [2022-11-23 15:21:15,899 INFO L138 BoogieDeclarations]: Found implementation of procedure resource_size [2022-11-23 15:21:15,899 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2022-11-23 15:21:15,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2022-11-23 15:21:15,900 INFO L130 BoogieDeclarations]: Found specification of procedure desc_get_tx_ls [2022-11-23 15:21:15,900 INFO L138 BoogieDeclarations]: Found implementation of procedure desc_get_tx_ls [2022-11-23 15:21:16,915 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:21:16,922 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:21:17,511 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-23 15:27:16,015 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2022-11-23 15:27:16,148 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:27:20,056 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:27:20,056 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-11-23 15:27:20,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:27:20 BoogieIcfgContainer [2022-11-23 15:27:20,065 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:27:20,069 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:27:20,069 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:27:20,073 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:27:20,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:21:10" (1/3) ... [2022-11-23 15:27:20,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3febd92e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:27:20, skipping insertion in model container [2022-11-23 15:27:20,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:15" (2/3) ... [2022-11-23 15:27:20,077 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3febd92e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:27:20, skipping insertion in model container [2022-11-23 15:27:20,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:27:20" (3/3) ... [2022-11-23 15:27:20,078 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-calxeda-xgmac.cil.i [2022-11-23 15:27:20,102 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:27:20,103 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-11-23 15:27:20,229 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:27:20,239 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4d1e2089, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:27:20,241 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-23 15:27:20,254 INFO L276 IsEmpty]: Start isEmpty. Operand has 1536 states, 890 states have (on average 1.2651685393258427) internal successors, (1126), 911 states have internal predecessors, (1126), 528 states have call successors, (528), 116 states have call predecessors, (528), 115 states have return successors, (521), 516 states have call predecessors, (521), 521 states have call successors, (521) [2022-11-23 15:27:20,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-23 15:27:20,289 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:27:20,290 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:27:20,291 INFO L420 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)] === [2022-11-23 15:27:20,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:27:20,300 INFO L85 PathProgramCache]: Analyzing trace with hash -28605198, now seen corresponding path program 1 times [2022-11-23 15:27:20,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:27:20,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914916973] [2022-11-23 15:27:20,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:27:20,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:27:21,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:27:23,314 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2022-11-23 15:27:23,314 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:27:23,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914916973] [2022-11-23 15:27:23,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914916973] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:27:23,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:27:23,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:27:23,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021200032] [2022-11-23 15:27:23,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:27:23,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:27:23,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:27:23,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:27:23,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:27:23,391 INFO L87 Difference]: Start difference. First operand has 1536 states, 890 states have (on average 1.2651685393258427) internal successors, (1126), 911 states have internal predecessors, (1126), 528 states have call successors, (528), 116 states have call predecessors, (528), 115 states have return successors, (521), 516 states have call predecessors, (521), 521 states have call successors, (521) Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 15:27:25,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.22s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:27:30,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:27:32,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:27:32,191 INFO L93 Difference]: Finished difference Result 4489 states and 6433 transitions. [2022-11-23 15:27:32,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:27:32,194 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 147 [2022-11-23 15:27:32,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:27:32,239 INFO L225 Difference]: With dead ends: 4489 [2022-11-23 15:27:32,240 INFO L226 Difference]: Without dead ends: 2968 [2022-11-23 15:27:32,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:27:32,260 INFO L413 NwaCegarLoop]: 2342 mSDtfsCounter, 2071 mSDsluCounter, 1823 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2071 SdHoareTripleChecker+Valid, 4165 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:27:32,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2071 Valid, 4165 Invalid, 644 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 640 Invalid, 1 Unknown, 0 Unchecked, 8.4s Time] [2022-11-23 15:27:32,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2968 states. [2022-11-23 15:27:32,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2968 to 2964. [2022-11-23 15:27:32,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2964 states, 1730 states have (on average 1.2595375722543352) internal successors, (2179), 1770 states have internal predecessors, (2179), 1004 states have call successors, (1004), 228 states have call predecessors, (1004), 227 states have return successors, (1001), 991 states have call predecessors, (1001), 1001 states have call successors, (1001) [2022-11-23 15:27:32,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2964 states to 2964 states and 4184 transitions. [2022-11-23 15:27:32,586 INFO L78 Accepts]: Start accepts. Automaton has 2964 states and 4184 transitions. Word has length 147 [2022-11-23 15:27:32,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:27:32,594 INFO L495 AbstractCegarLoop]: Abstraction has 2964 states and 4184 transitions. [2022-11-23 15:27:32,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 15:27:32,594 INFO L276 IsEmpty]: Start isEmpty. Operand 2964 states and 4184 transitions. [2022-11-23 15:27:32,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-11-23 15:27:32,613 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:27:32,613 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:27:32,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:27:32,615 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 15:27:32,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:27:32,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1872096164, now seen corresponding path program 1 times [2022-11-23 15:27:32,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:27:32,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608414288] [2022-11-23 15:27:32,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:27:32,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:27:33,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:27:34,381 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2022-11-23 15:27:34,381 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:27:34,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608414288] [2022-11-23 15:27:34,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608414288] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:27:34,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:27:34,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:27:34,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173698701] [2022-11-23 15:27:34,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:27:34,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:27:34,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:27:34,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:27:34,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:27:34,386 INFO L87 Difference]: Start difference. First operand 2964 states and 4184 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 15:27:36,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:27:40,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:27:44,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:27:44,970 INFO L93 Difference]: Finished difference Result 8240 states and 11620 transitions. [2022-11-23 15:27:44,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:27:44,971 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 161 [2022-11-23 15:27:44,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:27:45,023 INFO L225 Difference]: With dead ends: 8240 [2022-11-23 15:27:45,023 INFO L226 Difference]: Without dead ends: 5303 [2022-11-23 15:27:45,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:27:45,044 INFO L413 NwaCegarLoop]: 2245 mSDtfsCounter, 1670 mSDsluCounter, 1779 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1670 SdHoareTripleChecker+Valid, 4024 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:27:45,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1670 Valid, 4024 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 683 Invalid, 1 Unknown, 0 Unchecked, 10.0s Time] [2022-11-23 15:27:45,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5303 states. [2022-11-23 15:27:45,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5303 to 5274. [2022-11-23 15:27:45,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5274 states, 3077 states have (on average 1.2512187195320117) internal successors, (3850), 3151 states have internal predecessors, (3850), 1757 states have call successors, (1757), 440 states have call predecessors, (1757), 437 states have return successors, (1822), 1724 states have call predecessors, (1822), 1754 states have call successors, (1822) [2022-11-23 15:27:45,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5274 states to 5274 states and 7429 transitions. [2022-11-23 15:27:45,538 INFO L78 Accepts]: Start accepts. Automaton has 5274 states and 7429 transitions. Word has length 161 [2022-11-23 15:27:45,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:27:45,543 INFO L495 AbstractCegarLoop]: Abstraction has 5274 states and 7429 transitions. [2022-11-23 15:27:45,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 15:27:45,544 INFO L276 IsEmpty]: Start isEmpty. Operand 5274 states and 7429 transitions. [2022-11-23 15:27:45,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-11-23 15:27:45,556 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:27:45,556 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:27:45,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 15:27:45,559 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 15:27:45,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:27:45,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1516155204, now seen corresponding path program 1 times [2022-11-23 15:27:45,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:27:45,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709574733] [2022-11-23 15:27:45,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:27:45,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:27:46,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:27:47,790 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2022-11-23 15:27:47,791 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:27:47,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709574733] [2022-11-23 15:27:47,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709574733] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:27:47,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:27:47,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:27:47,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255243695] [2022-11-23 15:27:47,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:27:47,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:27:47,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:27:47,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:27:47,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:27:47,794 INFO L87 Difference]: Start difference. First operand 5274 states and 7429 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, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2022-11-23 15:27:49,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:27:55,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:27:58,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:27:58,072 INFO L93 Difference]: Finished difference Result 14636 states and 20487 transitions. [2022-11-23 15:27:58,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:27:58,073 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, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 172 [2022-11-23 15:27:58,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:27:58,150 INFO L225 Difference]: With dead ends: 14636 [2022-11-23 15:27:58,151 INFO L226 Difference]: Without dead ends: 9389 [2022-11-23 15:27:58,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:27:58,188 INFO L413 NwaCegarLoop]: 2673 mSDtfsCounter, 1689 mSDsluCounter, 1776 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 29 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1689 SdHoareTripleChecker+Valid, 4449 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2022-11-23 15:27:58,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1689 Valid, 4449 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 807 Invalid, 1 Unknown, 0 Unchecked, 9.8s Time] [2022-11-23 15:27:58,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9389 states. [2022-11-23 15:27:58,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9389 to 9356. [2022-11-23 15:27:59,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9356 states, 5429 states have (on average 1.2319027445201696) internal successors, (6688), 5565 states have internal predecessors, (6688), 3095 states have call successors, (3095), 834 states have call predecessors, (3095), 829 states have return successors, (3162), 3032 states have call predecessors, (3162), 3092 states have call successors, (3162) [2022-11-23 15:27:59,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9356 states to 9356 states and 12945 transitions. [2022-11-23 15:27:59,083 INFO L78 Accepts]: Start accepts. Automaton has 9356 states and 12945 transitions. Word has length 172 [2022-11-23 15:27:59,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:27:59,085 INFO L495 AbstractCegarLoop]: Abstraction has 9356 states and 12945 transitions. [2022-11-23 15:27:59,087 INFO L496 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, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2022-11-23 15:27:59,087 INFO L276 IsEmpty]: Start isEmpty. Operand 9356 states and 12945 transitions. [2022-11-23 15:27:59,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-11-23 15:27:59,092 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:27:59,093 INFO L195 NwaCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:27:59,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 15:27:59,094 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 15:27:59,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:27:59,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1177009551, now seen corresponding path program 1 times [2022-11-23 15:27:59,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:27:59,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273969674] [2022-11-23 15:27:59,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:27:59,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:28:00,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:28:02,465 INFO L134 CoverageAnalysis]: Checked inductivity of 763 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 763 trivial. 0 not checked. [2022-11-23 15:28:02,465 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:28:02,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273969674] [2022-11-23 15:28:02,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273969674] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:28:02,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:28:02,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:28:02,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618002250] [2022-11-23 15:28:02,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:28:02,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:28:02,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:28:02,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:28:02,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:28:02,468 INFO L87 Difference]: Start difference. First operand 9356 states and 12945 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-23 15:28:04,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:28:12,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:28:12,463 INFO L93 Difference]: Finished difference Result 9512 states and 13083 transitions. [2022-11-23 15:28:12,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:28:12,464 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 185 [2022-11-23 15:28:12,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:28:12,673 INFO L225 Difference]: With dead ends: 9512 [2022-11-23 15:28:12,674 INFO L226 Difference]: Without dead ends: 9510 [2022-11-23 15:28:12,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:28:12,679 INFO L413 NwaCegarLoop]: 1847 mSDtfsCounter, 2078 mSDsluCounter, 3718 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2089 SdHoareTripleChecker+Valid, 5565 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:28:12,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2089 Valid, 5565 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 980 Invalid, 1 Unknown, 0 Unchecked, 9.5s Time] [2022-11-23 15:28:12,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9510 states. [2022-11-23 15:28:13,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9510 to 9508. [2022-11-23 15:28:13,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9508 states, 5518 states have (on average 1.230699528814788) internal successors, (6791), 5662 states have internal predecessors, (6791), 3111 states have call successors, (3111), 881 states have call predecessors, (3111), 876 states have return successors, (3178), 3048 states have call predecessors, (3178), 3108 states have call successors, (3178) [2022-11-23 15:28:13,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9508 states to 9508 states and 13080 transitions. [2022-11-23 15:28:13,262 INFO L78 Accepts]: Start accepts. Automaton has 9508 states and 13080 transitions. Word has length 185 [2022-11-23 15:28:13,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:28:13,263 INFO L495 AbstractCegarLoop]: Abstraction has 9508 states and 13080 transitions. [2022-11-23 15:28:13,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-23 15:28:13,264 INFO L276 IsEmpty]: Start isEmpty. Operand 9508 states and 13080 transitions. [2022-11-23 15:28:13,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-11-23 15:28:13,269 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:28:13,269 INFO L195 NwaCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:28:13,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 15:28:13,269 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 15:28:13,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:28:13,270 INFO L85 PathProgramCache]: Analyzing trace with hash -657620303, now seen corresponding path program 1 times [2022-11-23 15:28:13,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:28:13,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941655086] [2022-11-23 15:28:13,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:28:13,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:28:13,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:28:15,897 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 763 trivial. 0 not checked. [2022-11-23 15:28:15,897 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:28:15,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941655086] [2022-11-23 15:28:15,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941655086] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:28:15,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:28:15,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:28:15,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69056519] [2022-11-23 15:28:15,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:28:15,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:28:15,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:28:15,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:28:15,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:28:15,899 INFO L87 Difference]: Start difference. First operand 9508 states and 13080 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-23 15:28:18,065 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:28:25,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:28:27,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:28:27,803 INFO L93 Difference]: Finished difference Result 9514 states and 13085 transitions. [2022-11-23 15:28:27,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:28:27,804 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 190 [2022-11-23 15:28:27,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:28:27,866 INFO L225 Difference]: With dead ends: 9514 [2022-11-23 15:28:27,866 INFO L226 Difference]: Without dead ends: 9512 [2022-11-23 15:28:27,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:28:27,875 INFO L413 NwaCegarLoop]: 1829 mSDtfsCounter, 2091 mSDsluCounter, 3639 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2101 SdHoareTripleChecker+Valid, 5468 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:28:27,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2101 Valid, 5468 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 969 Invalid, 2 Unknown, 0 Unchecked, 11.4s Time] [2022-11-23 15:28:27,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9512 states. [2022-11-23 15:28:28,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9512 to 9512. [2022-11-23 15:28:28,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9512 states, 5521 states have (on average 1.2305741713457707) internal successors, (6794), 5665 states have internal predecessors, (6794), 3111 states have call successors, (3111), 882 states have call predecessors, (3111), 877 states have return successors, (3178), 3048 states have call predecessors, (3178), 3108 states have call successors, (3178) [2022-11-23 15:28:28,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9512 states to 9512 states and 13083 transitions. [2022-11-23 15:28:28,590 INFO L78 Accepts]: Start accepts. Automaton has 9512 states and 13083 transitions. Word has length 190 [2022-11-23 15:28:28,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:28:28,593 INFO L495 AbstractCegarLoop]: Abstraction has 9512 states and 13083 transitions. [2022-11-23 15:28:28,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-23 15:28:28,593 INFO L276 IsEmpty]: Start isEmpty. Operand 9512 states and 13083 transitions. [2022-11-23 15:28:28,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-11-23 15:28:28,600 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:28:28,601 INFO L195 NwaCegarLoop]: trace histogram [15, 13, 13, 13, 13, 13, 13, 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] [2022-11-23 15:28:28,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 15:28:28,601 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 15:28:28,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:28:28,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1186817672, now seen corresponding path program 1 times [2022-11-23 15:28:28,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:28:28,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869196462] [2022-11-23 15:28:28,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:28:28,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:28:29,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:28:30,336 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 678 trivial. 0 not checked. [2022-11-23 15:28:30,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:28:30,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869196462] [2022-11-23 15:28:30,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869196462] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:28:30,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:28:30,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:28:30,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393836548] [2022-11-23 15:28:30,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:28:30,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:28:30,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:28:30,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:28:30,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:28:30,338 INFO L87 Difference]: Start difference. First operand 9512 states and 13083 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2022-11-23 15:28:32,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:28:39,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:28:39,846 INFO L93 Difference]: Finished difference Result 18326 states and 25206 transitions. [2022-11-23 15:28:39,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:28:39,847 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 192 [2022-11-23 15:28:39,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:28:39,897 INFO L225 Difference]: With dead ends: 18326 [2022-11-23 15:28:39,898 INFO L226 Difference]: Without dead ends: 8841 [2022-11-23 15:28:39,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:28:39,942 INFO L413 NwaCegarLoop]: 3412 mSDtfsCounter, 2024 mSDsluCounter, 1805 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2024 SdHoareTripleChecker+Valid, 5217 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:28:39,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2024 Valid, 5217 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 929 Invalid, 1 Unknown, 0 Unchecked, 9.0s Time] [2022-11-23 15:28:39,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8841 states. [2022-11-23 15:28:40,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8841 to 8805. [2022-11-23 15:28:40,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8805 states, 5176 states have (on average 1.2293276661514683) internal successors, (6363), 5313 states have internal predecessors, (6363), 2819 states have call successors, (2819), 811 states have call predecessors, (2819), 807 states have return successors, (2884), 2757 states have call predecessors, (2884), 2816 states have call successors, (2884) [2022-11-23 15:28:40,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8805 states to 8805 states and 12066 transitions. [2022-11-23 15:28:40,445 INFO L78 Accepts]: Start accepts. Automaton has 8805 states and 12066 transitions. Word has length 192 [2022-11-23 15:28:40,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:28:40,446 INFO L495 AbstractCegarLoop]: Abstraction has 8805 states and 12066 transitions. [2022-11-23 15:28:40,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2022-11-23 15:28:40,447 INFO L276 IsEmpty]: Start isEmpty. Operand 8805 states and 12066 transitions. [2022-11-23 15:28:40,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-11-23 15:28:40,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:28:40,452 INFO L195 NwaCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 6, 6, 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] [2022-11-23 15:28:40,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 15:28:40,452 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 15:28:40,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:28:40,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1556154286, now seen corresponding path program 1 times [2022-11-23 15:28:40,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:28:40,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557435634] [2022-11-23 15:28:40,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:28:40,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:28:41,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:28:43,591 INFO L134 CoverageAnalysis]: Checked inductivity of 797 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 793 trivial. 0 not checked. [2022-11-23 15:28:43,591 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:28:43,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557435634] [2022-11-23 15:28:43,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557435634] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:28:43,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:28:43,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:28:43,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608240629] [2022-11-23 15:28:43,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:28:43,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:28:43,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:28:43,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:28:43,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:28:43,594 INFO L87 Difference]: Start difference. First operand 8805 states and 12066 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-23 15:28:45,784 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:28:51,698 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:28:54,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:28:54,655 INFO L93 Difference]: Finished difference Result 8811 states and 12071 transitions. [2022-11-23 15:28:54,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:28:54,671 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 204 [2022-11-23 15:28:54,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:28:54,721 INFO L225 Difference]: With dead ends: 8811 [2022-11-23 15:28:54,721 INFO L226 Difference]: Without dead ends: 8809 [2022-11-23 15:28:54,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:28:54,730 INFO L413 NwaCegarLoop]: 1829 mSDtfsCounter, 2087 mSDsluCounter, 3639 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2096 SdHoareTripleChecker+Valid, 5468 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:28:54,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2096 Valid, 5468 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 970 Invalid, 1 Unknown, 0 Unchecked, 10.6s Time] [2022-11-23 15:28:54,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8809 states. [2022-11-23 15:28:55,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8809 to 8809. [2022-11-23 15:28:55,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8809 states, 5179 states have (on average 1.229194825255841) internal successors, (6366), 5316 states have internal predecessors, (6366), 2819 states have call successors, (2819), 812 states have call predecessors, (2819), 808 states have return successors, (2884), 2757 states have call predecessors, (2884), 2816 states have call successors, (2884) [2022-11-23 15:28:55,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8809 states to 8809 states and 12069 transitions. [2022-11-23 15:28:55,448 INFO L78 Accepts]: Start accepts. Automaton has 8809 states and 12069 transitions. Word has length 204 [2022-11-23 15:28:55,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:28:55,449 INFO L495 AbstractCegarLoop]: Abstraction has 8809 states and 12069 transitions. [2022-11-23 15:28:55,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-23 15:28:55,450 INFO L276 IsEmpty]: Start isEmpty. Operand 8809 states and 12069 transitions. [2022-11-23 15:28:55,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-11-23 15:28:55,455 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:28:55,455 INFO L195 NwaCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:28:55,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 15:28:55,455 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 15:28:55,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:28:55,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1482107599, now seen corresponding path program 1 times [2022-11-23 15:28:55,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:28:55,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103361979] [2022-11-23 15:28:55,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:28:55,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:28:56,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:28:57,948 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2022-11-23 15:28:57,948 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:28:57,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103361979] [2022-11-23 15:28:57,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103361979] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:28:57,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:28:57,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:28:57,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632626342] [2022-11-23 15:28:57,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:28:57,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:28:57,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:28:57,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:28:57,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:28:57,951 INFO L87 Difference]: Start difference. First operand 8809 states and 12069 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-23 15:29:00,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:29:07,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:29:07,757 INFO L93 Difference]: Finished difference Result 8815 states and 12074 transitions. [2022-11-23 15:29:07,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:29:07,758 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 200 [2022-11-23 15:29:07,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:29:07,794 INFO L225 Difference]: With dead ends: 8815 [2022-11-23 15:29:07,795 INFO L226 Difference]: Without dead ends: 8813 [2022-11-23 15:29:07,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:29:07,801 INFO L413 NwaCegarLoop]: 1829 mSDtfsCounter, 2091 mSDsluCounter, 3639 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2099 SdHoareTripleChecker+Valid, 5468 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:29:07,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2099 Valid, 5468 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 970 Invalid, 1 Unknown, 0 Unchecked, 9.3s Time] [2022-11-23 15:29:07,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8813 states. [2022-11-23 15:29:08,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8813 to 8813. [2022-11-23 15:29:08,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8813 states, 5182 states have (on average 1.2290621381705904) internal successors, (6369), 5319 states have internal predecessors, (6369), 2819 states have call successors, (2819), 813 states have call predecessors, (2819), 809 states have return successors, (2884), 2757 states have call predecessors, (2884), 2816 states have call successors, (2884) [2022-11-23 15:29:08,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8813 states to 8813 states and 12072 transitions. [2022-11-23 15:29:08,412 INFO L78 Accepts]: Start accepts. Automaton has 8813 states and 12072 transitions. Word has length 200 [2022-11-23 15:29:08,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:29:08,413 INFO L495 AbstractCegarLoop]: Abstraction has 8813 states and 12072 transitions. [2022-11-23 15:29:08,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-23 15:29:08,414 INFO L276 IsEmpty]: Start isEmpty. Operand 8813 states and 12072 transitions. [2022-11-23 15:29:08,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-11-23 15:29:08,418 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:29:08,419 INFO L195 NwaCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:29:08,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 15:29:08,419 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 15:29:08,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:29:08,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1809111153, now seen corresponding path program 1 times [2022-11-23 15:29:08,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:29:08,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363403376] [2022-11-23 15:29:08,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:29:08,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:29:09,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:29:10,950 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 787 trivial. 0 not checked. [2022-11-23 15:29:10,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:29:10,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363403376] [2022-11-23 15:29:10,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363403376] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:29:10,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:29:10,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:29:10,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072564328] [2022-11-23 15:29:10,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:29:10,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:29:10,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:29:10,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:29:10,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:29:10,952 INFO L87 Difference]: Start difference. First operand 8813 states and 12072 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-23 15:29:13,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:29:20,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:29:20,457 INFO L93 Difference]: Finished difference Result 8819 states and 12077 transitions. [2022-11-23 15:29:20,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:29:20,457 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 205 [2022-11-23 15:29:20,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:29:20,505 INFO L225 Difference]: With dead ends: 8819 [2022-11-23 15:29:20,505 INFO L226 Difference]: Without dead ends: 8817 [2022-11-23 15:29:20,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:29:20,514 INFO L413 NwaCegarLoop]: 1829 mSDtfsCounter, 2091 mSDsluCounter, 3639 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2098 SdHoareTripleChecker+Valid, 5468 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:29:20,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2098 Valid, 5468 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 970 Invalid, 1 Unknown, 0 Unchecked, 9.0s Time] [2022-11-23 15:29:20,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8817 states. [2022-11-23 15:29:21,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8817 to 8817. [2022-11-23 15:29:21,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8817 states, 5185 states have (on average 1.2289296046287368) internal successors, (6372), 5322 states have internal predecessors, (6372), 2819 states have call successors, (2819), 814 states have call predecessors, (2819), 810 states have return successors, (2884), 2757 states have call predecessors, (2884), 2816 states have call successors, (2884) [2022-11-23 15:29:21,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8817 states to 8817 states and 12075 transitions. [2022-11-23 15:29:21,220 INFO L78 Accepts]: Start accepts. Automaton has 8817 states and 12075 transitions. Word has length 205 [2022-11-23 15:29:21,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:29:21,221 INFO L495 AbstractCegarLoop]: Abstraction has 8817 states and 12075 transitions. [2022-11-23 15:29:21,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-23 15:29:21,221 INFO L276 IsEmpty]: Start isEmpty. Operand 8817 states and 12075 transitions. [2022-11-23 15:29:21,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-11-23 15:29:21,226 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:29:21,226 INFO L195 NwaCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 6, 5, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:29:21,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 15:29:21,226 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 15:29:21,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:29:21,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1227835471, now seen corresponding path program 1 times [2022-11-23 15:29:21,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:29:21,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780665917] [2022-11-23 15:29:21,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:29:21,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:29:21,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:29:23,640 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 803 trivial. 0 not checked. [2022-11-23 15:29:23,640 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:29:23,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780665917] [2022-11-23 15:29:23,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780665917] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:29:23,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:29:23,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:29:23,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371933065] [2022-11-23 15:29:23,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:29:23,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:29:23,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:29:23,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:29:23,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:29:23,643 INFO L87 Difference]: Start difference. First operand 8817 states and 12075 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-11-23 15:29:25,791 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:29:31,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:29:33,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:29:33,699 INFO L93 Difference]: Finished difference Result 8823 states and 12080 transitions. [2022-11-23 15:29:33,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:29:33,700 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 210 [2022-11-23 15:29:33,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:29:33,742 INFO L225 Difference]: With dead ends: 8823 [2022-11-23 15:29:33,742 INFO L226 Difference]: Without dead ends: 8821 [2022-11-23 15:29:33,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:29:33,750 INFO L413 NwaCegarLoop]: 1829 mSDtfsCounter, 2091 mSDsluCounter, 3639 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2097 SdHoareTripleChecker+Valid, 5468 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:29:33,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2097 Valid, 5468 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 970 Invalid, 1 Unknown, 0 Unchecked, 9.5s Time] [2022-11-23 15:29:33,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8821 states. [2022-11-23 15:29:34,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8821 to 8821. [2022-11-23 15:29:34,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8821 states, 5188 states have (on average 1.2287972243639167) internal successors, (6375), 5325 states have internal predecessors, (6375), 2819 states have call successors, (2819), 815 states have call predecessors, (2819), 811 states have return successors, (2884), 2757 states have call predecessors, (2884), 2816 states have call successors, (2884) [2022-11-23 15:29:34,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8821 states to 8821 states and 12078 transitions. [2022-11-23 15:29:34,663 INFO L78 Accepts]: Start accepts. Automaton has 8821 states and 12078 transitions. Word has length 210 [2022-11-23 15:29:34,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:29:34,664 INFO L495 AbstractCegarLoop]: Abstraction has 8821 states and 12078 transitions. [2022-11-23 15:29:34,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-11-23 15:29:34,665 INFO L276 IsEmpty]: Start isEmpty. Operand 8821 states and 12078 transitions. [2022-11-23 15:29:34,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-11-23 15:29:34,670 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:29:34,670 INFO L195 NwaCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 7, 6, 6, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:29:34,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 15:29:34,671 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 15:29:34,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:29:34,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1732707471, now seen corresponding path program 1 times [2022-11-23 15:29:34,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:29:34,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692584640] [2022-11-23 15:29:34,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:29:34,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:29:35,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:29:37,101 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 823 trivial. 0 not checked. [2022-11-23 15:29:37,102 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:29:37,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692584640] [2022-11-23 15:29:37,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692584640] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:29:37,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:29:37,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:29:37,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344579019] [2022-11-23 15:29:37,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:29:37,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:29:37,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:29:37,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:29:37,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:29:37,104 INFO L87 Difference]: Start difference. First operand 8821 states and 12078 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-23 15:29:39,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:29:44,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:29:47,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:29:47,855 INFO L93 Difference]: Finished difference Result 8827 states and 12083 transitions. [2022-11-23 15:29:47,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:29:47,856 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 215 [2022-11-23 15:29:47,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:29:47,881 INFO L225 Difference]: With dead ends: 8827 [2022-11-23 15:29:47,882 INFO L226 Difference]: Without dead ends: 8825 [2022-11-23 15:29:47,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:29:47,887 INFO L413 NwaCegarLoop]: 1829 mSDtfsCounter, 2091 mSDsluCounter, 3639 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2096 SdHoareTripleChecker+Valid, 5468 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:29:47,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2096 Valid, 5468 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 970 Invalid, 1 Unknown, 0 Unchecked, 10.1s Time] [2022-11-23 15:29:47,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8825 states. [2022-11-23 15:29:48,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8825 to 8825. [2022-11-23 15:29:48,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8825 states, 5191 states have (on average 1.2286649971103834) internal successors, (6378), 5328 states have internal predecessors, (6378), 2819 states have call successors, (2819), 816 states have call predecessors, (2819), 812 states have return successors, (2884), 2757 states have call predecessors, (2884), 2816 states have call successors, (2884) [2022-11-23 15:29:48,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8825 states to 8825 states and 12081 transitions. [2022-11-23 15:29:48,572 INFO L78 Accepts]: Start accepts. Automaton has 8825 states and 12081 transitions. Word has length 215 [2022-11-23 15:29:48,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:29:48,573 INFO L495 AbstractCegarLoop]: Abstraction has 8825 states and 12081 transitions. [2022-11-23 15:29:48,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-23 15:29:48,573 INFO L276 IsEmpty]: Start isEmpty. Operand 8825 states and 12081 transitions. [2022-11-23 15:29:48,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2022-11-23 15:29:48,578 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:29:48,579 INFO L195 NwaCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 8, 7, 7, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:29:48,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 15:29:48,579 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 15:29:48,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:29:48,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1143920079, now seen corresponding path program 1 times [2022-11-23 15:29:48,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:29:48,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717926482] [2022-11-23 15:29:48,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:29:48,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:29:49,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:29:50,759 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2022-11-23 15:29:50,759 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:29:50,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717926482] [2022-11-23 15:29:50,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717926482] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:29:50,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:29:50,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:29:50,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609319150] [2022-11-23 15:29:50,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:29:50,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:29:50,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:29:50,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:29:50,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:29:50,761 INFO L87 Difference]: Start difference. First operand 8825 states and 12081 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-23 15:29:52,919 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:30:00,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:30:00,408 INFO L93 Difference]: Finished difference Result 8831 states and 12086 transitions. [2022-11-23 15:30:00,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:30:00,409 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 220 [2022-11-23 15:30:00,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:30:00,434 INFO L225 Difference]: With dead ends: 8831 [2022-11-23 15:30:00,434 INFO L226 Difference]: Without dead ends: 8829 [2022-11-23 15:30:00,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:30:00,440 INFO L413 NwaCegarLoop]: 1829 mSDtfsCounter, 2091 mSDsluCounter, 3639 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2095 SdHoareTripleChecker+Valid, 5468 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:30:00,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2095 Valid, 5468 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 970 Invalid, 1 Unknown, 0 Unchecked, 9.0s Time] [2022-11-23 15:30:00,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8829 states. [2022-11-23 15:30:01,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8829 to 8829. [2022-11-23 15:30:01,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8829 states, 5194 states have (on average 1.2285329226030035) internal successors, (6381), 5331 states have internal predecessors, (6381), 2819 states have call successors, (2819), 817 states have call predecessors, (2819), 813 states have return successors, (2884), 2757 states have call predecessors, (2884), 2816 states have call successors, (2884) [2022-11-23 15:30:01,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8829 states to 8829 states and 12084 transitions. [2022-11-23 15:30:01,145 INFO L78 Accepts]: Start accepts. Automaton has 8829 states and 12084 transitions. Word has length 220 [2022-11-23 15:30:01,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:30:01,146 INFO L495 AbstractCegarLoop]: Abstraction has 8829 states and 12084 transitions. [2022-11-23 15:30:01,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-23 15:30:01,147 INFO L276 IsEmpty]: Start isEmpty. Operand 8829 states and 12084 transitions. [2022-11-23 15:30:01,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-11-23 15:30:01,151 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:30:01,151 INFO L195 NwaCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 9, 8, 8, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:30:01,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 15:30:01,152 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 15:30:01,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:30:01,152 INFO L85 PathProgramCache]: Analyzing trace with hash -446410353, now seen corresponding path program 1 times [2022-11-23 15:30:01,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:30:01,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766121146] [2022-11-23 15:30:01,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:30:01,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:30:01,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:30:03,334 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 875 trivial. 0 not checked. [2022-11-23 15:30:03,334 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:30:03,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766121146] [2022-11-23 15:30:03,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766121146] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:30:03,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:30:03,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:30:03,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801038462] [2022-11-23 15:30:03,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:30:03,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:30:03,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:30:03,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:30:03,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:30:03,337 INFO L87 Difference]: Start difference. First operand 8829 states and 12084 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-23 15:30:05,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:30:12,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:30:15,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:30:15,099 INFO L93 Difference]: Finished difference Result 8835 states and 12089 transitions. [2022-11-23 15:30:15,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:30:15,100 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 225 [2022-11-23 15:30:15,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:30:15,136 INFO L225 Difference]: With dead ends: 8835 [2022-11-23 15:30:15,136 INFO L226 Difference]: Without dead ends: 8833 [2022-11-23 15:30:15,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:30:15,143 INFO L413 NwaCegarLoop]: 1829 mSDtfsCounter, 2091 mSDsluCounter, 3639 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2094 SdHoareTripleChecker+Valid, 5468 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:30:15,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2094 Valid, 5468 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 970 Invalid, 1 Unknown, 0 Unchecked, 11.1s Time] [2022-11-23 15:30:15,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8833 states. [2022-11-23 15:30:15,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8833 to 8833. [2022-11-23 15:30:15,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8833 states, 5197 states have (on average 1.228401000577256) internal successors, (6384), 5334 states have internal predecessors, (6384), 2819 states have call successors, (2819), 818 states have call predecessors, (2819), 814 states have return successors, (2884), 2757 states have call predecessors, (2884), 2816 states have call successors, (2884) [2022-11-23 15:30:15,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8833 states to 8833 states and 12087 transitions. [2022-11-23 15:30:15,721 INFO L78 Accepts]: Start accepts. Automaton has 8833 states and 12087 transitions. Word has length 225 [2022-11-23 15:30:15,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:30:15,722 INFO L495 AbstractCegarLoop]: Abstraction has 8833 states and 12087 transitions. [2022-11-23 15:30:15,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-23 15:30:15,722 INFO L276 IsEmpty]: Start isEmpty. Operand 8833 states and 12087 transitions. [2022-11-23 15:30:15,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-11-23 15:30:15,726 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:30:15,726 INFO L195 NwaCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 10, 9, 9, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:30:15,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 15:30:15,727 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 15:30:15,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:30:15,727 INFO L85 PathProgramCache]: Analyzing trace with hash 263099186, now seen corresponding path program 1 times [2022-11-23 15:30:15,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:30:15,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914679360] [2022-11-23 15:30:15,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:30:15,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:30:16,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:30:17,640 INFO L134 CoverageAnalysis]: Checked inductivity of 951 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 933 trivial. 0 not checked. [2022-11-23 15:30:17,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:30:17,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914679360] [2022-11-23 15:30:17,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914679360] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:30:17,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:30:17,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:30:17,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818944820] [2022-11-23 15:30:17,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:30:17,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:30:17,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:30:17,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:30:17,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:30:17,644 INFO L87 Difference]: Start difference. First operand 8833 states and 12087 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2022-11-23 15:30:19,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:30:25,326 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:30:27,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:30:30,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:30:30,044 INFO L93 Difference]: Finished difference Result 8839 states and 12092 transitions. [2022-11-23 15:30:30,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:30:30,045 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 239 [2022-11-23 15:30:30,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:30:30,075 INFO L225 Difference]: With dead ends: 8839 [2022-11-23 15:30:30,075 INFO L226 Difference]: Without dead ends: 8837 [2022-11-23 15:30:30,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:30:30,078 INFO L413 NwaCegarLoop]: 1829 mSDtfsCounter, 2087 mSDsluCounter, 3639 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2089 SdHoareTripleChecker+Valid, 5468 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:30:30,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2089 Valid, 5468 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 969 Invalid, 2 Unknown, 0 Unchecked, 11.5s Time] [2022-11-23 15:30:30,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8837 states. [2022-11-23 15:30:30,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8837 to 8837. [2022-11-23 15:30:30,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8837 states, 5200 states have (on average 1.2282692307692307) internal successors, (6387), 5337 states have internal predecessors, (6387), 2819 states have call successors, (2819), 819 states have call predecessors, (2819), 815 states have return successors, (2884), 2757 states have call predecessors, (2884), 2816 states have call successors, (2884) [2022-11-23 15:30:30,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8837 states to 8837 states and 12090 transitions. [2022-11-23 15:30:30,699 INFO L78 Accepts]: Start accepts. Automaton has 8837 states and 12090 transitions. Word has length 239 [2022-11-23 15:30:30,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:30:30,699 INFO L495 AbstractCegarLoop]: Abstraction has 8837 states and 12090 transitions. [2022-11-23 15:30:30,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2022-11-23 15:30:30,700 INFO L276 IsEmpty]: Start isEmpty. Operand 8837 states and 12090 transitions. [2022-11-23 15:30:30,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-11-23 15:30:30,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:30:30,705 INFO L195 NwaCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 11, 10, 10, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:30:30,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-23 15:30:30,705 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 15:30:30,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:30:30,706 INFO L85 PathProgramCache]: Analyzing trace with hash 259460751, now seen corresponding path program 1 times [2022-11-23 15:30:30,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:30:30,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113961207] [2022-11-23 15:30:30,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:30:30,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:30:31,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:30:32,559 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 943 trivial. 0 not checked. [2022-11-23 15:30:32,559 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:30:32,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113961207] [2022-11-23 15:30:32,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113961207] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:30:32,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:30:32,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:30:32,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93945786] [2022-11-23 15:30:32,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:30:32,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:30:32,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:30:32,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:30:32,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:30:32,561 INFO L87 Difference]: Start difference. First operand 8837 states and 12090 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2022-11-23 15:30:34,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:30:43,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:30:43,883 INFO L93 Difference]: Finished difference Result 8881 states and 12120 transitions. [2022-11-23 15:30:43,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:30:43,883 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 235 [2022-11-23 15:30:43,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:30:43,914 INFO L225 Difference]: With dead ends: 8881 [2022-11-23 15:30:43,914 INFO L226 Difference]: Without dead ends: 8877 [2022-11-23 15:30:43,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:30:43,920 INFO L413 NwaCegarLoop]: 1829 mSDtfsCounter, 2044 mSDsluCounter, 3690 mSDsCounter, 0 mSdLazyCounter, 974 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2045 SdHoareTripleChecker+Valid, 5519 SdHoareTripleChecker+Invalid, 977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 974 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:30:43,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2045 Valid, 5519 Invalid, 977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 974 Invalid, 1 Unknown, 0 Unchecked, 10.5s Time] [2022-11-23 15:30:43,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8877 states. [2022-11-23 15:30:44,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8877 to 8875. [2022-11-23 15:30:44,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8875 states, 5224 states have (on average 1.2274119448698315) internal successors, (6412), 5360 states have internal predecessors, (6412), 2819 states have call successors, (2819), 834 states have call predecessors, (2819), 829 states have return successors, (2884), 2757 states have call predecessors, (2884), 2816 states have call successors, (2884) [2022-11-23 15:30:44,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8875 states to 8875 states and 12115 transitions. [2022-11-23 15:30:44,693 INFO L78 Accepts]: Start accepts. Automaton has 8875 states and 12115 transitions. Word has length 235 [2022-11-23 15:30:44,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:30:44,694 INFO L495 AbstractCegarLoop]: Abstraction has 8875 states and 12115 transitions. [2022-11-23 15:30:44,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2022-11-23 15:30:44,694 INFO L276 IsEmpty]: Start isEmpty. Operand 8875 states and 12115 transitions. [2022-11-23 15:30:44,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-11-23 15:30:44,702 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:30:44,702 INFO L195 NwaCegarLoop]: trace histogram [18, 13, 13, 13, 13, 13, 13, 5, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:30:44,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-23 15:30:44,702 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 15:30:44,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:30:44,703 INFO L85 PathProgramCache]: Analyzing trace with hash -267957720, now seen corresponding path program 1 times [2022-11-23 15:30:44,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:30:44,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860378206] [2022-11-23 15:30:44,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:30:44,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:30:45,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:30:46,100 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2022-11-23 15:30:46,100 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:30:46,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860378206] [2022-11-23 15:30:46,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860378206] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:30:46,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:30:46,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:30:46,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385500713] [2022-11-23 15:30:46,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:30:46,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:30:46,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:30:46,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:30:46,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:30:46,102 INFO L87 Difference]: Start difference. First operand 8875 states and 12115 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2022-11-23 15:30:48,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:30:55,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:30:57,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:30:57,771 INFO L93 Difference]: Finished difference Result 21453 states and 29334 transitions. [2022-11-23 15:30:57,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:30:57,772 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) Word has length 235 [2022-11-23 15:30:57,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:30:57,810 INFO L225 Difference]: With dead ends: 21453 [2022-11-23 15:30:57,810 INFO L226 Difference]: Without dead ends: 12756 [2022-11-23 15:30:57,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:30:57,843 INFO L413 NwaCegarLoop]: 3520 mSDtfsCounter, 2021 mSDsluCounter, 1801 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2021 SdHoareTripleChecker+Valid, 5321 SdHoareTripleChecker+Invalid, 975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:30:57,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2021 Valid, 5321 Invalid, 975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 963 Invalid, 1 Unknown, 0 Unchecked, 10.5s Time] [2022-11-23 15:30:57,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12756 states. [2022-11-23 15:30:58,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12756 to 12686. [2022-11-23 15:30:58,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12686 states, 7483 states have (on average 1.2289188828010156) internal successors, (9196), 7679 states have internal predecessors, (9196), 4019 states have call successors, (4019), 1187 states have call predecessors, (4019), 1181 states have return successors, (4117), 3931 states have call predecessors, (4117), 4016 states have call successors, (4117) [2022-11-23 15:30:58,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12686 states to 12686 states and 17332 transitions. [2022-11-23 15:30:58,841 INFO L78 Accepts]: Start accepts. Automaton has 12686 states and 17332 transitions. Word has length 235 [2022-11-23 15:30:58,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:30:58,841 INFO L495 AbstractCegarLoop]: Abstraction has 12686 states and 17332 transitions. [2022-11-23 15:30:58,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2022-11-23 15:30:58,842 INFO L276 IsEmpty]: Start isEmpty. Operand 12686 states and 17332 transitions. [2022-11-23 15:30:58,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-11-23 15:30:58,845 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:30:58,845 INFO L195 NwaCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 12, 11, 11, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:30:58,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-23 15:30:58,846 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 15:30:58,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:30:58,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1434105970, now seen corresponding path program 1 times [2022-11-23 15:30:58,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:30:58,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69400505] [2022-11-23 15:30:58,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:30:58,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:30:59,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:31:01,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 1009 trivial. 0 not checked. [2022-11-23 15:31:01,160 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:31:01,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69400505] [2022-11-23 15:31:01,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69400505] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:31:01,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:31:01,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:31:01,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547687344] [2022-11-23 15:31:01,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:31:01,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:31:01,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:31:01,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:31:01,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:31:01,163 INFO L87 Difference]: Start difference. First operand 12686 states and 17332 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2022-11-23 15:31:03,305 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:31:08,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:31:11,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:31:13,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:31:13,873 INFO L93 Difference]: Finished difference Result 13452 states and 18144 transitions. [2022-11-23 15:31:13,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:31:13,874 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 249 [2022-11-23 15:31:13,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:31:13,919 INFO L225 Difference]: With dead ends: 13452 [2022-11-23 15:31:13,919 INFO L226 Difference]: Without dead ends: 13329 [2022-11-23 15:31:13,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:31:13,924 INFO L413 NwaCegarLoop]: 1926 mSDtfsCounter, 2019 mSDsluCounter, 4003 mSDsCounter, 0 mSdLazyCounter, 1059 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2019 SdHoareTripleChecker+Valid, 5929 SdHoareTripleChecker+Invalid, 1062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1059 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:31:13,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2019 Valid, 5929 Invalid, 1062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1059 Invalid, 1 Unknown, 0 Unchecked, 11.5s Time] [2022-11-23 15:31:13,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13329 states. [2022-11-23 15:31:14,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13329 to 13325. [2022-11-23 15:31:14,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13325 states, 7860 states have (on average 1.2225190839694657) internal successors, (9609), 8032 states have internal predecessors, (9609), 4119 states have call successors, (4119), 1348 states have call predecessors, (4119), 1344 states have return successors, (4220), 4056 states have call predecessors, (4220), 4119 states have call successors, (4220) [2022-11-23 15:31:14,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13325 states to 13325 states and 17948 transitions. [2022-11-23 15:31:14,961 INFO L78 Accepts]: Start accepts. Automaton has 13325 states and 17948 transitions. Word has length 249 [2022-11-23 15:31:14,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:31:14,962 INFO L495 AbstractCegarLoop]: Abstraction has 13325 states and 17948 transitions. [2022-11-23 15:31:14,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2022-11-23 15:31:14,962 INFO L276 IsEmpty]: Start isEmpty. Operand 13325 states and 17948 transitions. [2022-11-23 15:31:14,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2022-11-23 15:31:14,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:31:14,969 INFO L195 NwaCegarLoop]: trace histogram [20, 13, 13, 13, 13, 13, 13, 7, 7, 4, 4, 4, 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] [2022-11-23 15:31:14,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-23 15:31:14,969 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 15:31:14,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:31:14,970 INFO L85 PathProgramCache]: Analyzing trace with hash -199124327, now seen corresponding path program 1 times [2022-11-23 15:31:14,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:31:14,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395818735] [2022-11-23 15:31:14,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:31:14,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:31:15,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:31:16,356 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 929 trivial. 0 not checked. [2022-11-23 15:31:16,356 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:31:16,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395818735] [2022-11-23 15:31:16,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395818735] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:31:16,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:31:16,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:31:16,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143871990] [2022-11-23 15:31:16,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:31:16,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:31:16,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:31:16,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:31:16,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:31:16,359 INFO L87 Difference]: Start difference. First operand 13325 states and 17948 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) [2022-11-23 15:31:18,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:31:27,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:31:27,967 INFO L93 Difference]: Finished difference Result 31010 states and 41873 transitions. [2022-11-23 15:31:27,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:31:27,968 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) Word has length 277 [2022-11-23 15:31:27,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:31:28,183 INFO L225 Difference]: With dead ends: 31010 [2022-11-23 15:31:28,183 INFO L226 Difference]: Without dead ends: 17863 [2022-11-23 15:31:28,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:31:28,213 INFO L413 NwaCegarLoop]: 3177 mSDtfsCounter, 1659 mSDsluCounter, 1734 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 28 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1659 SdHoareTripleChecker+Valid, 4911 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2022-11-23 15:31:28,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1659 Valid, 4911 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 952 Invalid, 1 Unknown, 0 Unchecked, 9.9s Time] [2022-11-23 15:31:28,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17863 states. [2022-11-23 15:31:29,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17863 to 17855. [2022-11-23 15:31:29,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17855 states, 10564 states have (on average 1.21932979931844) internal successors, (12881), 10797 states have internal predecessors, (12881), 5496 states have call successors, (5496), 1798 states have call predecessors, (5496), 1793 states have return successors, (5598), 5414 states have call predecessors, (5598), 5496 states have call successors, (5598) [2022-11-23 15:31:29,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17855 states to 17855 states and 23975 transitions. [2022-11-23 15:31:29,994 INFO L78 Accepts]: Start accepts. Automaton has 17855 states and 23975 transitions. Word has length 277 [2022-11-23 15:31:29,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:31:29,995 INFO L495 AbstractCegarLoop]: Abstraction has 17855 states and 23975 transitions. [2022-11-23 15:31:29,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) [2022-11-23 15:31:29,995 INFO L276 IsEmpty]: Start isEmpty. Operand 17855 states and 23975 transitions. [2022-11-23 15:31:30,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2022-11-23 15:31:30,003 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:31:30,003 INFO L195 NwaCegarLoop]: trace histogram [21, 13, 13, 13, 13, 13, 13, 9, 9, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:31:30,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-23 15:31:30,004 INFO L420 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)] === [2022-11-23 15:31:30,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:31:30,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1940759534, now seen corresponding path program 1 times [2022-11-23 15:31:30,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:31:30,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531042388] [2022-11-23 15:31:30,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:31:30,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:31:30,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:31:34,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1033 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1033 trivial. 0 not checked. [2022-11-23 15:31:34,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:31:34,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531042388] [2022-11-23 15:31:34,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531042388] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:31:34,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:31:34,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:31:34,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003514033] [2022-11-23 15:31:34,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:31:34,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:31:34,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:31:34,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:31:34,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:31:34,242 INFO L87 Difference]: Start difference. First operand 17855 states and 23975 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (49), 3 states have call predecessors, (49), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) [2022-11-23 15:31:36,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:31:45,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:31:45,880 INFO L93 Difference]: Finished difference Result 17907 states and 24025 transitions. [2022-11-23 15:31:45,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:31:45,881 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (49), 3 states have call predecessors, (49), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) Word has length 321 [2022-11-23 15:31:45,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:31:45,953 INFO L225 Difference]: With dead ends: 17907 [2022-11-23 15:31:45,954 INFO L226 Difference]: Without dead ends: 17905 [2022-11-23 15:31:45,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:31:45,962 INFO L413 NwaCegarLoop]: 1810 mSDtfsCounter, 1986 mSDsluCounter, 3647 mSDsCounter, 0 mSdLazyCounter, 965 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1989 SdHoareTripleChecker+Valid, 5457 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 965 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2022-11-23 15:31:45,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1989 Valid, 5457 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 965 Invalid, 1 Unknown, 0 Unchecked, 9.9s Time] [2022-11-23 15:31:45,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17905 states. [2022-11-23 15:31:47,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17905 to 17903. [2022-11-23 15:31:47,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17903 states, 10600 states have (on average 1.2178301886792453) internal successors, (12909), 10833 states have internal predecessors, (12909), 5496 states have call successors, (5496), 1810 states have call predecessors, (5496), 1805 states have return successors, (5598), 5414 states have call predecessors, (5598), 5496 states have call successors, (5598) [2022-11-23 15:31:47,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17903 states to 17903 states and 24003 transitions. [2022-11-23 15:31:47,487 INFO L78 Accepts]: Start accepts. Automaton has 17903 states and 24003 transitions. Word has length 321 [2022-11-23 15:31:47,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:31:47,488 INFO L495 AbstractCegarLoop]: Abstraction has 17903 states and 24003 transitions. [2022-11-23 15:31:47,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (49), 3 states have call predecessors, (49), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) [2022-11-23 15:31:47,488 INFO L276 IsEmpty]: Start isEmpty. Operand 17903 states and 24003 transitions. [2022-11-23 15:31:47,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2022-11-23 15:31:47,497 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:31:47,497 INFO L195 NwaCegarLoop]: trace histogram [22, 13, 13, 13, 13, 13, 13, 7, 7, 5, 5, 5, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:31:47,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-23 15:31:47,497 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 15:31:47,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:31:47,498 INFO L85 PathProgramCache]: Analyzing trace with hash -267553245, now seen corresponding path program 1 times [2022-11-23 15:31:47,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:31:47,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629019292] [2022-11-23 15:31:47,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:31:47,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:31:48,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:31:49,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 1029 trivial. 0 not checked. [2022-11-23 15:31:49,440 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:31:49,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629019292] [2022-11-23 15:31:49,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629019292] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:31:49,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:31:49,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:31:49,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053202179] [2022-11-23 15:31:49,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:31:49,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:31:49,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:31:49,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:31:49,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:31:49,443 INFO L87 Difference]: Start difference. First operand 17903 states and 24003 transitions. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 4 states have internal predecessors, (124), 3 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2022-11-23 15:31:51,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:32:09,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:32:09,320 INFO L93 Difference]: Finished difference Result 39998 states and 53643 transitions. [2022-11-23 15:32:09,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:32:09,321 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 4 states have internal predecessors, (124), 3 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) Word has length 326 [2022-11-23 15:32:09,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:32:09,410 INFO L225 Difference]: With dead ends: 39998 [2022-11-23 15:32:09,411 INFO L226 Difference]: Without dead ends: 22273 [2022-11-23 15:32:09,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:32:09,464 INFO L413 NwaCegarLoop]: 3176 mSDtfsCounter, 1621 mSDsluCounter, 8084 mSDsCounter, 0 mSdLazyCounter, 2049 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1621 SdHoareTripleChecker+Valid, 11260 SdHoareTripleChecker+Invalid, 2051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2049 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:32:09,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1621 Valid, 11260 Invalid, 2051 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 2049 Invalid, 1 Unknown, 0 Unchecked, 17.5s Time] [2022-11-23 15:32:09,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22273 states. [2022-11-23 15:32:11,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22273 to 22253. [2022-11-23 15:32:11,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22253 states, 13127 states have (on average 1.2177192046926182) internal successors, (15985), 13421 states have internal predecessors, (15985), 6867 states have call successors, (6867), 2257 states have call predecessors, (6867), 2257 states have return successors, (6976), 6772 states have call predecessors, (6976), 6867 states have call successors, (6976) [2022-11-23 15:32:11,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22253 states to 22253 states and 29828 transitions. [2022-11-23 15:32:11,468 INFO L78 Accepts]: Start accepts. Automaton has 22253 states and 29828 transitions. Word has length 326 [2022-11-23 15:32:11,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:32:11,469 INFO L495 AbstractCegarLoop]: Abstraction has 22253 states and 29828 transitions. [2022-11-23 15:32:11,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 4 states have internal predecessors, (124), 3 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2022-11-23 15:32:11,469 INFO L276 IsEmpty]: Start isEmpty. Operand 22253 states and 29828 transitions. [2022-11-23 15:32:11,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2022-11-23 15:32:11,475 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:32:11,475 INFO L195 NwaCegarLoop]: trace histogram [22, 13, 13, 13, 13, 13, 13, 7, 7, 5, 5, 5, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:32:11,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-23 15:32:11,475 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 15:32:11,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:32:11,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1708169016, now seen corresponding path program 1 times [2022-11-23 15:32:11,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:32:11,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732536273] [2022-11-23 15:32:11,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:32:11,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:32:12,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:32:13,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 1029 trivial. 0 not checked. [2022-11-23 15:32:13,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:32:13,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732536273] [2022-11-23 15:32:13,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732536273] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:32:13,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:32:13,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:32:13,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288885249] [2022-11-23 15:32:13,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:32:13,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:32:13,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:32:13,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:32:13,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:32:13,049 INFO L87 Difference]: Start difference. First operand 22253 states and 29828 transitions. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 3 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2022-11-23 15:32:15,188 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:32:27,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:32:34,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:32:34,311 INFO L93 Difference]: Finished difference Result 50908 states and 68333 transitions. [2022-11-23 15:32:34,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:32:34,311 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 3 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) Word has length 327 [2022-11-23 15:32:34,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:32:34,420 INFO L225 Difference]: With dead ends: 50908 [2022-11-23 15:32:34,420 INFO L226 Difference]: Without dead ends: 28833 [2022-11-23 15:32:34,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:32:34,482 INFO L413 NwaCegarLoop]: 3056 mSDtfsCounter, 1749 mSDsluCounter, 7836 mSDsCounter, 0 mSdLazyCounter, 2012 mSolverCounterSat, 22 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1749 SdHoareTripleChecker+Valid, 10892 SdHoareTripleChecker+Invalid, 2036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 2012 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:32:34,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1749 Valid, 10892 Invalid, 2036 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [22 Valid, 2012 Invalid, 2 Unknown, 0 Unchecked, 18.1s Time] [2022-11-23 15:32:34,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28833 states. [2022-11-23 15:32:37,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28833 to 28813. [2022-11-23 15:32:37,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28813 states, 16909 states have (on average 1.2126086699390857) internal successors, (20504), 17293 states have internal predecessors, (20504), 8972 states have call successors, (8972), 2927 states have call predecessors, (8972), 2930 states have return successors, (9091), 8847 states have call predecessors, (9091), 8972 states have call successors, (9091) [2022-11-23 15:32:37,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28813 states to 28813 states and 38567 transitions. [2022-11-23 15:32:37,701 INFO L78 Accepts]: Start accepts. Automaton has 28813 states and 38567 transitions. Word has length 327 [2022-11-23 15:32:37,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:32:37,701 INFO L495 AbstractCegarLoop]: Abstraction has 28813 states and 38567 transitions. [2022-11-23 15:32:37,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 3 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2022-11-23 15:32:37,702 INFO L276 IsEmpty]: Start isEmpty. Operand 28813 states and 38567 transitions. [2022-11-23 15:32:37,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2022-11-23 15:32:37,711 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:32:37,711 INFO L195 NwaCegarLoop]: trace histogram [22, 13, 13, 13, 13, 13, 13, 7, 7, 5, 5, 5, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:32:37,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-23 15:32:37,711 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 15:32:37,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:32:37,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1896050382, now seen corresponding path program 1 times [2022-11-23 15:32:37,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:32:37,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948191036] [2022-11-23 15:32:37,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:32:37,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:32:38,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:32:39,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 1029 trivial. 0 not checked. [2022-11-23 15:32:39,549 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:32:39,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948191036] [2022-11-23 15:32:39,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948191036] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:32:39,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:32:39,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:32:39,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973384771] [2022-11-23 15:32:39,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:32:39,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:32:39,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:32:39,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:32:39,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:32:39,551 INFO L87 Difference]: Start difference. First operand 28813 states and 38567 transitions. Second operand has 5 states, 5 states have (on average 25.2) internal successors, (126), 4 states have internal predecessors, (126), 3 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2022-11-23 15:32:41,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:32:53,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:32:54,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:33:02,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:33:02,171 INFO L93 Difference]: Finished difference Result 64046 states and 85847 transitions. [2022-11-23 15:33:02,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:33:02,172 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 4 states have internal predecessors, (126), 3 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) Word has length 328 [2022-11-23 15:33:02,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:33:02,292 INFO L225 Difference]: With dead ends: 64046 [2022-11-23 15:33:02,293 INFO L226 Difference]: Without dead ends: 35411 [2022-11-23 15:33:02,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:33:02,352 INFO L413 NwaCegarLoop]: 3270 mSDtfsCounter, 1743 mSDsluCounter, 8270 mSDsCounter, 0 mSdLazyCounter, 2139 mSolverCounterSat, 25 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1743 SdHoareTripleChecker+Valid, 11540 SdHoareTripleChecker+Invalid, 2165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 2139 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:33:02,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1743 Valid, 11540 Invalid, 2165 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [25 Valid, 2139 Invalid, 1 Unknown, 0 Unchecked, 19.2s Time] [2022-11-23 15:33:02,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35411 states. [2022-11-23 15:33:05,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35411 to 35391. [2022-11-23 15:33:05,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35391 states, 20709 states have (on average 1.209184412574243) internal successors, (25041), 21183 states have internal predecessors, (25041), 11077 states have call successors, (11077), 3597 states have call predecessors, (11077), 3603 states have return successors, (11206), 10922 states have call predecessors, (11206), 11077 states have call successors, (11206) [2022-11-23 15:33:05,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35391 states to 35391 states and 47324 transitions. [2022-11-23 15:33:05,867 INFO L78 Accepts]: Start accepts. Automaton has 35391 states and 47324 transitions. Word has length 328 [2022-11-23 15:33:05,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:33:05,867 INFO L495 AbstractCegarLoop]: Abstraction has 35391 states and 47324 transitions. [2022-11-23 15:33:05,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 4 states have internal predecessors, (126), 3 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2022-11-23 15:33:05,868 INFO L276 IsEmpty]: Start isEmpty. Operand 35391 states and 47324 transitions. [2022-11-23 15:33:05,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2022-11-23 15:33:05,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:33:05,875 INFO L195 NwaCegarLoop]: trace histogram [22, 13, 13, 13, 13, 13, 13, 7, 7, 5, 5, 5, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:33:05,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-23 15:33:05,875 INFO L420 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)] === [2022-11-23 15:33:05,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:33:05,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1629419823, now seen corresponding path program 1 times [2022-11-23 15:33:05,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:33:05,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673297319] [2022-11-23 15:33:05,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:05,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:33:06,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:08,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 1029 trivial. 0 not checked. [2022-11-23 15:33:08,421 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:33:08,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673297319] [2022-11-23 15:33:08,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673297319] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:33:08,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:33:08,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:33:08,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134677531] [2022-11-23 15:33:08,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:33:08,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:33:08,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:33:08,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:33:08,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:33:08,424 INFO L87 Difference]: Start difference. First operand 35391 states and 47324 transitions. Second operand has 5 states, 5 states have (on average 25.4) internal successors, (127), 4 states have internal predecessors, (127), 3 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2022-11-23 15:33:10,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:33:23,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:33:23,183 INFO L93 Difference]: Finished difference Result 75040 states and 100359 transitions. [2022-11-23 15:33:23,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:33:23,184 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 4 states have internal predecessors, (127), 3 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) Word has length 329 [2022-11-23 15:33:23,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:33:23,317 INFO L225 Difference]: With dead ends: 75040 [2022-11-23 15:33:23,317 INFO L226 Difference]: Without dead ends: 39827 [2022-11-23 15:33:23,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:33:23,400 INFO L413 NwaCegarLoop]: 2305 mSDtfsCounter, 1894 mSDsluCounter, 6148 mSDsCounter, 0 mSdLazyCounter, 1417 mSolverCounterSat, 30 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1898 SdHoareTripleChecker+Valid, 8453 SdHoareTripleChecker+Invalid, 1448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1417 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:33:23,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1898 Valid, 8453 Invalid, 1448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1417 Invalid, 1 Unknown, 0 Unchecked, 11.1s Time] [2022-11-23 15:33:23,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39827 states. [2022-11-23 15:33:27,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39827 to 39819. [2022-11-23 15:33:27,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39819 states, 23278 states have (on average 1.2104562247615775) internal successors, (28177), 23817 states have internal predecessors, (28177), 12470 states have call successors, (12470), 4064 states have call predecessors, (12470), 4069 states have return successors, (12600), 12294 states have call predecessors, (12600), 12470 states have call successors, (12600) [2022-11-23 15:33:27,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39819 states to 39819 states and 53247 transitions. [2022-11-23 15:33:27,710 INFO L78 Accepts]: Start accepts. Automaton has 39819 states and 53247 transitions. Word has length 329 [2022-11-23 15:33:27,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:33:27,711 INFO L495 AbstractCegarLoop]: Abstraction has 39819 states and 53247 transitions. [2022-11-23 15:33:27,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 4 states have internal predecessors, (127), 3 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2022-11-23 15:33:27,711 INFO L276 IsEmpty]: Start isEmpty. Operand 39819 states and 53247 transitions. [2022-11-23 15:33:27,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2022-11-23 15:33:27,723 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:33:27,723 INFO L195 NwaCegarLoop]: trace histogram [21, 13, 13, 13, 13, 13, 13, 10, 10, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:33:27,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-23 15:33:27,724 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 15:33:27,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:33:27,725 INFO L85 PathProgramCache]: Analyzing trace with hash 866254015, now seen corresponding path program 1 times [2022-11-23 15:33:27,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:33:27,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059320601] [2022-11-23 15:33:27,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:27,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:33:28,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:31,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1062 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1062 trivial. 0 not checked. [2022-11-23 15:33:31,061 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:33:31,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059320601] [2022-11-23 15:33:31,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059320601] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:33:31,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:33:31,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 15:33:31,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099970289] [2022-11-23 15:33:31,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:33:31,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 15:33:31,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:33:31,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 15:33:31,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:33:31,064 INFO L87 Difference]: Start difference. First operand 39819 states and 53247 transitions. Second operand has 8 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 3 states have call successors, (56), 2 states have call predecessors, (56), 3 states have return successors, (52), 4 states have call predecessors, (52), 2 states have call successors, (52) [2022-11-23 15:33:33,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:33:45,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:33:55,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:33:55,967 INFO L93 Difference]: Finished difference Result 79900 states and 107171 transitions. [2022-11-23 15:33:55,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 15:33:55,968 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 3 states have call successors, (56), 2 states have call predecessors, (56), 3 states have return successors, (52), 4 states have call predecessors, (52), 2 states have call successors, (52) Word has length 352 [2022-11-23 15:33:55,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:33:56,136 INFO L225 Difference]: With dead ends: 79900 [2022-11-23 15:33:56,136 INFO L226 Difference]: Without dead ends: 40259 [2022-11-23 15:33:56,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-23 15:33:56,260 INFO L413 NwaCegarLoop]: 1768 mSDtfsCounter, 13 mSDsluCounter, 10557 mSDsCounter, 0 mSdLazyCounter, 2426 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 12325 SdHoareTripleChecker+Invalid, 2435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 2426 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:33:56,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 12325 Invalid, 2435 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [8 Valid, 2426 Invalid, 1 Unknown, 0 Unchecked, 20.6s Time] [2022-11-23 15:33:56,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40259 states.