./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 527ba95af45b5d863cb3ca1867267fd54ac6958329e64d7162c5caa88bde96c3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:32:32,162 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:32:32,164 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:32:32,197 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:32:32,197 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:32:32,199 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:32:32,200 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:32:32,203 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:32:32,205 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:32:32,206 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:32:32,208 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:32:32,209 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:32:32,210 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:32:32,212 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:32:32,213 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:32:32,215 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:32:32,216 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:32:32,217 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:32:32,219 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:32:32,222 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:32:32,223 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:32:32,230 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:32:32,235 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:32:32,236 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:32:32,248 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:32:32,249 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:32:32,249 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:32:32,250 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:32:32,251 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:32:32,252 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:32:32,252 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:32:32,253 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:32:32,254 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:32:32,255 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:32:32,256 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:32:32,256 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:32:32,257 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:32:32,257 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:32:32,258 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:32:32,266 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:32:32,268 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:32:32,269 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-20 23:32:32,313 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:32:32,313 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:32:32,314 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:32:32,314 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:32:32,315 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:32:32,321 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:32:32,321 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:32:32,321 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:32:32,321 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:32:32,322 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:32:32,322 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:32:32,323 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:32:32,323 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:32:32,323 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:32:32,323 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:32:32,324 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:32:32,324 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:32:32,324 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:32:32,325 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:32:32,325 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:32:32,325 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:32:32,325 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:32:32,325 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:32:32,326 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:32:32,326 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:32:32,326 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:32:32,327 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:32:32,328 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:32:32,328 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:32:32,328 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:32:32,328 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:32:32,329 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:32:32,329 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:32:32,329 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:32:32,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:32:32,329 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:32:32,329 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:32:32,330 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:32:32,330 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 527ba95af45b5d863cb3ca1867267fd54ac6958329e64d7162c5caa88bde96c3 [2021-11-20 23:32:32,595 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:32:32,613 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:32:32,615 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:32:32,617 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:32:32,617 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:32:32,619 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i [2021-11-20 23:32:32,679 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/bin/utaipan-TEXQjIfE4P/data/1fa6587f1/cacc25c45bd14db99ca9c5c07fc88fd1/FLAGf71a445fb [2021-11-20 23:32:33,710 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:32:33,711 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i [2021-11-20 23:32:33,760 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/bin/utaipan-TEXQjIfE4P/data/1fa6587f1/cacc25c45bd14db99ca9c5c07fc88fd1/FLAGf71a445fb [2021-11-20 23:32:34,016 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/bin/utaipan-TEXQjIfE4P/data/1fa6587f1/cacc25c45bd14db99ca9c5c07fc88fd1 [2021-11-20 23:32:34,019 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:32:34,022 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:32:34,027 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:32:34,027 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:32:34,031 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:32:34,032 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:32:34" (1/1) ... [2021-11-20 23:32:34,034 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c3d6e22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:34, skipping insertion in model container [2021-11-20 23:32:34,034 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:32:34" (1/1) ... [2021-11-20 23:32:34,043 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:32:34,253 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:32:38,685 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i[470813,470826] [2021-11-20 23:32:38,693 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i[470982,470995] [2021-11-20 23:32:38,694 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i[471149,471162] [2021-11-20 23:32:38,694 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i[471317,471330] [2021-11-20 23:32:38,724 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:32:38,808 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:32:39,432 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i[470813,470826] [2021-11-20 23:32:39,433 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i[470982,470995] [2021-11-20 23:32:39,433 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i[471149,471162] [2021-11-20 23:32:39,434 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i[471317,471330] [2021-11-20 23:32:39,442 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:32:39,694 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:32:39,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:39 WrapperNode [2021-11-20 23:32:39,695 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:32:39,696 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:32:39,696 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:32:39,696 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:32:39,704 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:39" (1/1) ... [2021-11-20 23:32:39,835 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:39" (1/1) ... [2021-11-20 23:32:40,163 INFO L137 Inliner]: procedures = 526, calls = 4106, calls flagged for inlining = 232, calls inlined = 215, statements flattened = 8429 [2021-11-20 23:32:40,164 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:32:40,165 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:32:40,165 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:32:40,166 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:32:40,174 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:39" (1/1) ... [2021-11-20 23:32:40,174 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:39" (1/1) ... [2021-11-20 23:32:40,258 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:39" (1/1) ... [2021-11-20 23:32:40,259 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:39" (1/1) ... [2021-11-20 23:32:40,635 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:39" (1/1) ... [2021-11-20 23:32:40,690 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:39" (1/1) ... [2021-11-20 23:32:40,739 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:39" (1/1) ... [2021-11-20 23:32:40,803 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:32:40,804 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:32:40,804 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:32:40,804 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:32:40,807 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:39" (1/1) ... [2021-11-20 23:32:40,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:32:40,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:32:40,836 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:32:40,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:32:40,883 INFO L130 BoogieDeclarations]: Found specification of procedure disable_ast [2021-11-20 23:32:40,883 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_ast [2021-11-20 23:32:40,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-20 23:32:40,883 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-20 23:32:40,883 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-20 23:32:40,884 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-20 23:32:40,884 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-20 23:32:40,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-20 23:32:40,884 INFO L130 BoogieDeclarations]: Found specification of procedure type4_infoblock [2021-11-20 23:32:40,884 INFO L138 BoogieDeclarations]: Found implementation of procedure type4_infoblock [2021-11-20 23:32:40,884 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_put_cache [2021-11-20 23:32:40,884 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_put_cache [2021-11-20 23:32:40,885 INFO L130 BoogieDeclarations]: Found specification of procedure pci_read_config_word [2021-11-20 23:32:40,885 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_read_config_word [2021-11-20 23:32:40,885 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_lock_of_de4x5_private [2021-11-20 23:32:40,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_lock_of_de4x5_private [2021-11-20 23:32:40,885 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-20 23:32:40,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-20 23:32:40,885 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_lock_of_de4x5_private [2021-11-20 23:32:40,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_lock_of_de4x5_private [2021-11-20 23:32:40,886 INFO L130 BoogieDeclarations]: Found specification of procedure getfrom_mii [2021-11-20 23:32:40,886 INFO L138 BoogieDeclarations]: Found implementation of procedure getfrom_mii [2021-11-20 23:32:40,886 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_switch_mac_port [2021-11-20 23:32:40,886 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_switch_mac_port [2021-11-20 23:32:40,886 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2021-11-20 23:32:40,886 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2021-11-20 23:32:40,887 INFO L130 BoogieDeclarations]: Found specification of procedure srom_latch [2021-11-20 23:32:40,887 INFO L138 BoogieDeclarations]: Found implementation of procedure srom_latch [2021-11-20 23:32:40,887 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_69 [2021-11-20 23:32:40,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_69 [2021-11-20 23:32:40,887 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-20 23:32:40,887 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-20 23:32:40,887 INFO L130 BoogieDeclarations]: Found specification of procedure build_setup_frame [2021-11-20 23:32:40,887 INFO L138 BoogieDeclarations]: Found implementation of procedure build_setup_frame [2021-11-20 23:32:40,888 INFO L130 BoogieDeclarations]: Found specification of procedure type2_infoblock [2021-11-20 23:32:40,888 INFO L138 BoogieDeclarations]: Found implementation of procedure type2_infoblock [2021-11-20 23:32:40,888 INFO L130 BoogieDeclarations]: Found specification of procedure type0_infoblock [2021-11-20 23:32:40,888 INFO L138 BoogieDeclarations]: Found implementation of procedure type0_infoblock [2021-11-20 23:32:40,888 INFO L130 BoogieDeclarations]: Found specification of procedure skb_queue_empty [2021-11-20 23:32:40,888 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_queue_empty [2021-11-20 23:32:40,888 INFO L130 BoogieDeclarations]: Found specification of procedure DevicePresent [2021-11-20 23:32:40,889 INFO L138 BoogieDeclarations]: Found implementation of procedure DevicePresent [2021-11-20 23:32:40,889 INFO L130 BoogieDeclarations]: Found specification of procedure eth_mac_addr [2021-11-20 23:32:40,889 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_mac_addr [2021-11-20 23:32:40,889 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-20 23:32:40,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-20 23:32:40,889 INFO L130 BoogieDeclarations]: Found specification of procedure dc21143_infoleaf [2021-11-20 23:32:40,889 INFO L138 BoogieDeclarations]: Found implementation of procedure dc21143_infoleaf [2021-11-20 23:32:40,890 INFO L130 BoogieDeclarations]: Found specification of procedure set_multicast_list [2021-11-20 23:32:40,890 INFO L138 BoogieDeclarations]: Found implementation of procedure set_multicast_list [2021-11-20 23:32:40,890 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-20 23:32:40,890 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-20 23:32:40,890 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-20 23:32:40,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-20 23:32:40,890 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2021-11-20 23:32:40,890 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_sw_reset [2021-11-20 23:32:40,891 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_sw_reset [2021-11-20 23:32:40,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 23:32:40,891 INFO L130 BoogieDeclarations]: Found specification of procedure netif_queue_stopped [2021-11-20 23:32:40,891 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_queue_stopped [2021-11-20 23:32:40,891 INFO L130 BoogieDeclarations]: Found specification of procedure capable [2021-11-20 23:32:40,891 INFO L138 BoogieDeclarations]: Found implementation of procedure capable [2021-11-20 23:32:40,892 INFO L130 BoogieDeclarations]: Found specification of procedure eth_change_mtu [2021-11-20 23:32:40,892 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_change_mtu [2021-11-20 23:32:40,892 INFO L130 BoogieDeclarations]: Found specification of procedure is_spd_100 [2021-11-20 23:32:40,892 INFO L138 BoogieDeclarations]: Found implementation of procedure is_spd_100 [2021-11-20 23:32:40,892 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-20 23:32:40,893 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-20 23:32:40,893 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-20 23:32:40,893 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-11-20 23:32:40,893 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-11-20 23:32:40,893 INFO L130 BoogieDeclarations]: Found specification of procedure sendto_mii [2021-11-20 23:32:40,893 INFO L138 BoogieDeclarations]: Found implementation of procedure sendto_mii [2021-11-20 23:32:40,894 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_free_rx_buffs [2021-11-20 23:32:40,894 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_free_rx_buffs [2021-11-20 23:32:40,894 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-20 23:32:40,894 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-20 23:32:40,894 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-20 23:32:40,894 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-20 23:32:40,895 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2021-11-20 23:32:40,895 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2021-11-20 23:32:40,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-20 23:32:40,895 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-20 23:32:40,895 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-20 23:32:40,896 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 23:32:40,896 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2021-11-20 23:32:40,896 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2021-11-20 23:32:40,896 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-20 23:32:40,896 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-20 23:32:40,896 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_interrupt_context [2021-11-20 23:32:40,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_interrupt_context [2021-11-20 23:32:40,897 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2021-11-20 23:32:40,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2021-11-20 23:32:40,897 INFO L130 BoogieDeclarations]: Found specification of procedure ping_media [2021-11-20 23:32:40,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ping_media [2021-11-20 23:32:40,898 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2021-11-20 23:32:40,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2021-11-20 23:32:40,898 INFO L130 BoogieDeclarations]: Found specification of procedure srom_autoconf [2021-11-20 23:32:40,898 INFO L138 BoogieDeclarations]: Found implementation of procedure srom_autoconf [2021-11-20 23:32:40,898 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2021-11-20 23:32:40,898 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2021-11-20 23:32:40,899 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2021-11-20 23:32:40,899 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2021-11-20 23:32:40,899 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_tx [2021-11-20 23:32:40,899 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_tx [2021-11-20 23:32:40,899 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-20 23:32:40,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-20 23:32:40,900 INFO L130 BoogieDeclarations]: Found specification of procedure __skb_dequeue [2021-11-20 23:32:40,900 INFO L138 BoogieDeclarations]: Found implementation of procedure __skb_dequeue [2021-11-20 23:32:40,900 INFO L130 BoogieDeclarations]: Found specification of procedure srom_rd [2021-11-20 23:32:40,900 INFO L138 BoogieDeclarations]: Found implementation of procedure srom_rd [2021-11-20 23:32:40,900 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 23:32:40,901 INFO L130 BoogieDeclarations]: Found specification of procedure SetMulticastFilter [2021-11-20 23:32:40,901 INFO L138 BoogieDeclarations]: Found implementation of procedure SetMulticastFilter [2021-11-20 23:32:40,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:32:40,901 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_ioctl [2021-11-20 23:32:40,901 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_ioctl [2021-11-20 23:32:40,901 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-20 23:32:40,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-20 23:32:40,902 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-20 23:32:40,902 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-20 23:32:40,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 23:32:40,902 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-20 23:32:40,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-20 23:32:40,903 INFO L130 BoogieDeclarations]: Found specification of procedure getfrom_srom [2021-11-20 23:32:40,903 INFO L138 BoogieDeclarations]: Found implementation of procedure getfrom_srom [2021-11-20 23:32:40,903 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2021-11-20 23:32:40,903 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2021-11-20 23:32:40,903 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-20 23:32:40,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-20 23:32:40,904 INFO L130 BoogieDeclarations]: Found specification of procedure mii_swap [2021-11-20 23:32:40,904 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_swap [2021-11-20 23:32:40,904 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_reset_phy [2021-11-20 23:32:40,904 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_reset_phy [2021-11-20 23:32:40,904 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_putb_cache [2021-11-20 23:32:40,905 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_putb_cache [2021-11-20 23:32:40,905 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_spin_lock [2021-11-20 23:32:40,905 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_spin_lock [2021-11-20 23:32:40,905 INFO L130 BoogieDeclarations]: Found specification of procedure dc21142_infoleaf [2021-11-20 23:32:40,905 INFO L138 BoogieDeclarations]: Found implementation of procedure dc21142_infoleaf [2021-11-20 23:32:40,905 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-20 23:32:40,906 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-20 23:32:40,906 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_get_stats [2021-11-20 23:32:40,906 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_get_stats [2021-11-20 23:32:40,906 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2021-11-20 23:32:40,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2021-11-20 23:32:40,906 INFO L130 BoogieDeclarations]: Found specification of procedure dev_name [2021-11-20 23:32:40,907 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_name [2021-11-20 23:32:40,907 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_init_connection [2021-11-20 23:32:40,907 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_init_connection [2021-11-20 23:32:40,907 INFO L130 BoogieDeclarations]: Found specification of procedure mii_wr [2021-11-20 23:32:40,907 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_wr [2021-11-20 23:32:40,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:32:40,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:32:40,908 INFO L130 BoogieDeclarations]: Found specification of procedure dc21040_state [2021-11-20 23:32:40,908 INFO L138 BoogieDeclarations]: Found implementation of procedure dc21040_state [2021-11-20 23:32:40,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2021-11-20 23:32:40,908 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2021-11-20 23:32:40,908 INFO L130 BoogieDeclarations]: Found specification of procedure type3_infoblock [2021-11-20 23:32:40,909 INFO L138 BoogieDeclarations]: Found implementation of procedure type3_infoblock [2021-11-20 23:32:40,909 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-20 23:32:40,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-20 23:32:40,909 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-20 23:32:40,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-20 23:32:40,909 INFO L130 BoogieDeclarations]: Found specification of procedure reset_init_sia [2021-11-20 23:32:40,910 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_init_sia [2021-11-20 23:32:40,910 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-20 23:32:40,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-20 23:32:40,910 INFO L130 BoogieDeclarations]: Found specification of procedure request_irq [2021-11-20 23:32:40,910 INFO L138 BoogieDeclarations]: Found implementation of procedure request_irq [2021-11-20 23:32:40,910 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_alloc_rx_buff [2021-11-20 23:32:40,911 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_alloc_rx_buff [2021-11-20 23:32:40,911 INFO L130 BoogieDeclarations]: Found specification of procedure test_for_100Mb [2021-11-20 23:32:40,911 INFO L138 BoogieDeclarations]: Found implementation of procedure test_for_100Mb [2021-11-20 23:32:40,911 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_process_context [2021-11-20 23:32:40,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_process_context [2021-11-20 23:32:40,911 INFO L130 BoogieDeclarations]: Found specification of procedure type5_infoblock [2021-11-20 23:32:40,912 INFO L138 BoogieDeclarations]: Found implementation of procedure type5_infoblock [2021-11-20 23:32:40,912 INFO L130 BoogieDeclarations]: Found specification of procedure load_packet [2021-11-20 23:32:40,912 INFO L138 BoogieDeclarations]: Found implementation of procedure load_packet [2021-11-20 23:32:40,912 INFO L130 BoogieDeclarations]: Found specification of procedure dc21140m_autoconf [2021-11-20 23:32:40,912 INFO L138 BoogieDeclarations]: Found implementation of procedure dc21140m_autoconf [2021-11-20 23:32:40,912 INFO L130 BoogieDeclarations]: Found specification of procedure is_100_up [2021-11-20 23:32:40,913 INFO L138 BoogieDeclarations]: Found implementation of procedure is_100_up [2021-11-20 23:32:40,913 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_open [2021-11-20 23:32:40,913 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_open [2021-11-20 23:32:40,913 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-20 23:32:40,913 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-20 23:32:40,913 INFO L130 BoogieDeclarations]: Found specification of procedure mii_ta [2021-11-20 23:32:40,914 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_ta [2021-11-20 23:32:40,914 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-20 23:32:40,914 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-20 23:32:40,914 INFO L130 BoogieDeclarations]: Found specification of procedure dc21040_autoconf [2021-11-20 23:32:40,914 INFO L138 BoogieDeclarations]: Found implementation of procedure dc21040_autoconf [2021-11-20 23:32:40,914 INFO L130 BoogieDeclarations]: Found specification of procedure get_unaligned_le16 [2021-11-20 23:32:40,915 INFO L138 BoogieDeclarations]: Found implementation of procedure get_unaligned_le16 [2021-11-20 23:32:40,915 INFO L130 BoogieDeclarations]: Found specification of procedure test_mii_reg [2021-11-20 23:32:40,915 INFO L138 BoogieDeclarations]: Found implementation of procedure test_mii_reg [2021-11-20 23:32:40,915 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_cache_state [2021-11-20 23:32:40,915 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_cache_state [2021-11-20 23:32:40,915 INFO L130 BoogieDeclarations]: Found specification of procedure netif_start_queue [2021-11-20 23:32:40,916 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_start_queue [2021-11-20 23:32:40,916 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_pci_remove [2021-11-20 23:32:40,916 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_pci_remove [2021-11-20 23:32:40,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 23:32:40,916 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_dbg_media [2021-11-20 23:32:40,916 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_dbg_media [2021-11-20 23:32:40,917 INFO L130 BoogieDeclarations]: Found specification of procedure autoconf_media [2021-11-20 23:32:40,917 INFO L138 BoogieDeclarations]: Found implementation of procedure autoconf_media [2021-11-20 23:32:40,917 INFO L130 BoogieDeclarations]: Found specification of procedure dc21041_autoconf [2021-11-20 23:32:40,917 INFO L138 BoogieDeclarations]: Found implementation of procedure dc21041_autoconf [2021-11-20 23:32:40,917 INFO L130 BoogieDeclarations]: Found specification of procedure mii_rd [2021-11-20 23:32:40,917 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_rd [2021-11-20 23:32:40,918 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 23:32:40,918 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_ast [2021-11-20 23:32:40,918 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_ast [2021-11-20 23:32:40,918 INFO L130 BoogieDeclarations]: Found specification of procedure get_unaligned_le32 [2021-11-20 23:32:40,918 INFO L138 BoogieDeclarations]: Found implementation of procedure get_unaligned_le32 [2021-11-20 23:32:40,918 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~u_char~0~X~$Pointer$~TO~int [2021-11-20 23:32:40,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~u_char~0~X~$Pointer$~TO~int [2021-11-20 23:32:40,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 23:32:40,919 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-11-20 23:32:40,919 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-11-20 23:32:40,919 INFO L130 BoogieDeclarations]: Found specification of procedure is_10_up [2021-11-20 23:32:40,919 INFO L138 BoogieDeclarations]: Found implementation of procedure is_10_up [2021-11-20 23:32:40,919 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~structbegin~int~structend~~TO~int [2021-11-20 23:32:40,920 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~structbegin~int~structend~~TO~int [2021-11-20 23:32:40,920 INFO L130 BoogieDeclarations]: Found specification of procedure pci_write_config_byte [2021-11-20 23:32:40,920 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_write_config_byte [2021-11-20 23:32:40,920 INFO L130 BoogieDeclarations]: Found specification of procedure is_anc_capable [2021-11-20 23:32:40,920 INFO L138 BoogieDeclarations]: Found implementation of procedure is_anc_capable [2021-11-20 23:32:40,920 INFO L130 BoogieDeclarations]: Found specification of procedure type1_infoblock [2021-11-20 23:32:40,921 INFO L138 BoogieDeclarations]: Found implementation of procedure type1_infoblock [2021-11-20 23:32:40,921 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-20 23:32:40,921 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-20 23:32:40,921 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2021-11-20 23:32:40,921 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2021-11-20 23:32:40,921 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_request_irq [2021-11-20 23:32:40,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_request_irq [2021-11-20 23:32:40,922 INFO L130 BoogieDeclarations]: Found specification of procedure dc21140_infoleaf [2021-11-20 23:32:40,922 INFO L138 BoogieDeclarations]: Found implementation of procedure dc21140_infoleaf [2021-11-20 23:32:40,922 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-20 23:32:40,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-20 23:32:40,922 INFO L130 BoogieDeclarations]: Found specification of procedure outl [2021-11-20 23:32:40,927 INFO L138 BoogieDeclarations]: Found implementation of procedure outl [2021-11-20 23:32:40,927 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_queue_pkt [2021-11-20 23:32:40,927 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_queue_pkt [2021-11-20 23:32:40,927 INFO L130 BoogieDeclarations]: Found specification of procedure test_media [2021-11-20 23:32:40,928 INFO L138 BoogieDeclarations]: Found implementation of procedure test_media [2021-11-20 23:32:40,928 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_free_tx_buffs [2021-11-20 23:32:40,928 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_free_tx_buffs [2021-11-20 23:32:40,928 INFO L130 BoogieDeclarations]: Found specification of procedure __skb_insert [2021-11-20 23:32:40,928 INFO L138 BoogieDeclarations]: Found implementation of procedure __skb_insert [2021-11-20 23:32:40,928 INFO L130 BoogieDeclarations]: Found specification of procedure dma_free_attrs [2021-11-20 23:32:40,929 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_free_attrs [2021-11-20 23:32:40,929 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-11-20 23:32:40,929 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-11-20 23:32:40,929 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-20 23:32:40,929 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-20 23:32:40,929 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_init [2021-11-20 23:32:40,930 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_init [2021-11-20 23:32:40,930 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2021-11-20 23:32:40,930 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2021-11-20 23:32:40,930 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_73 [2021-11-20 23:32:40,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_73 [2021-11-20 23:32:40,930 INFO L130 BoogieDeclarations]: Found specification of procedure dc21041_infoleaf [2021-11-20 23:32:40,931 INFO L138 BoogieDeclarations]: Found implementation of procedure dc21041_infoleaf [2021-11-20 23:32:40,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 23:32:40,931 INFO L130 BoogieDeclarations]: Found specification of procedure srom_exec [2021-11-20 23:32:40,931 INFO L138 BoogieDeclarations]: Found implementation of procedure srom_exec [2021-11-20 23:32:40,931 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-20 23:32:40,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-20 23:32:40,931 INFO L130 BoogieDeclarations]: Found specification of procedure gep_wr [2021-11-20 23:32:40,932 INFO L138 BoogieDeclarations]: Found implementation of procedure gep_wr [2021-11-20 23:32:40,932 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2021-11-20 23:32:40,932 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2021-11-20 23:32:40,932 INFO L130 BoogieDeclarations]: Found specification of procedure sendto_srom [2021-11-20 23:32:40,932 INFO L138 BoogieDeclarations]: Found implementation of procedure sendto_srom [2021-11-20 23:32:40,932 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2021-11-20 23:32:40,933 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2021-11-20 23:32:40,933 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_get_cache [2021-11-20 23:32:40,933 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_get_cache [2021-11-20 23:32:40,933 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_suspect_state [2021-11-20 23:32:40,933 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_suspect_state [2021-11-20 23:32:40,933 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_dbg_mii [2021-11-20 23:32:40,934 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_dbg_mii [2021-11-20 23:32:40,934 INFO L130 BoogieDeclarations]: Found specification of procedure compact_infoblock [2021-11-20 23:32:40,934 INFO L138 BoogieDeclarations]: Found implementation of procedure compact_infoblock [2021-11-20 23:32:40,934 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-20 23:32:40,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-20 23:32:40,934 INFO L130 BoogieDeclarations]: Found specification of procedure gep_rd [2021-11-20 23:32:40,935 INFO L138 BoogieDeclarations]: Found implementation of procedure gep_rd [2021-11-20 23:32:40,935 INFO L130 BoogieDeclarations]: Found specification of procedure mii_address [2021-11-20 23:32:40,935 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_address [2021-11-20 23:32:40,935 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_free_tx_buff [2021-11-20 23:32:40,935 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_free_tx_buff [2021-11-20 23:32:40,935 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_setup_intr [2021-11-20 23:32:40,936 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_setup_intr [2021-11-20 23:32:40,936 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_save_skbs [2021-11-20 23:32:40,936 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_save_skbs [2021-11-20 23:32:40,936 INFO L130 BoogieDeclarations]: Found specification of procedure dc2114x_autoconf [2021-11-20 23:32:40,936 INFO L138 BoogieDeclarations]: Found implementation of procedure dc2114x_autoconf [2021-11-20 23:32:40,936 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2021-11-20 23:32:40,936 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2021-11-20 23:32:40,937 INFO L130 BoogieDeclarations]: Found specification of procedure srom_map_media [2021-11-20 23:32:40,937 INFO L138 BoogieDeclarations]: Found implementation of procedure srom_map_media [2021-11-20 23:32:40,937 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_strncmp [2021-11-20 23:32:40,937 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_strncmp [2021-11-20 23:32:40,937 INFO L130 BoogieDeclarations]: Found specification of procedure inl [2021-11-20 23:32:40,937 INFO L138 BoogieDeclarations]: Found implementation of procedure inl [2021-11-20 23:32:40,938 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_close [2021-11-20 23:32:40,938 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_close [2021-11-20 23:32:40,938 INFO L130 BoogieDeclarations]: Found specification of procedure yawn [2021-11-20 23:32:40,938 INFO L138 BoogieDeclarations]: Found implementation of procedure yawn [2021-11-20 23:32:40,938 INFO L130 BoogieDeclarations]: Found specification of procedure mii_wdata [2021-11-20 23:32:40,938 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_wdata [2021-11-20 23:32:40,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:32:40,939 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-20 23:32:40,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-20 23:32:40,939 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2021-11-20 23:32:42,183 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:32:42,190 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:32:42,566 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-20 23:32:57,500 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:33:00,691 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:33:00,691 INFO L301 CfgBuilder]: Removed 17 assume(true) statements. [2021-11-20 23:33:00,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:33:00 BoogieIcfgContainer [2021-11-20 23:33:00,698 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:33:00,699 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:33:00,700 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:33:00,712 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:33:00,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:32:34" (1/3) ... [2021-11-20 23:33:00,713 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23bd1ae5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:33:00, skipping insertion in model container [2021-11-20 23:33:00,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:39" (2/3) ... [2021-11-20 23:33:00,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23bd1ae5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:33:00, skipping insertion in model container [2021-11-20 23:33:00,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:33:00" (3/3) ... [2021-11-20 23:33:00,715 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i [2021-11-20 23:33:00,724 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:33:00,724 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-20 23:33:00,788 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:33:00,795 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 23:33:00,796 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-20 23:33:00,881 INFO L276 IsEmpty]: Start isEmpty. Operand has 2945 states, 1835 states have (on average 1.3416893732970028) internal successors, (2462), 1912 states have internal predecessors, (2462), 972 states have call successors, (972), 151 states have call predecessors, (972), 150 states have return successors, (963), 949 states have call predecessors, (963), 963 states have call successors, (963) [2021-11-20 23:33:00,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-20 23:33:00,888 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:33:00,889 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:33:00,889 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:33:00,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:33:00,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1111459102, now seen corresponding path program 1 times [2021-11-20 23:33:00,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:33:00,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30070026] [2021-11-20 23:33:00,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:33:00,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:33:01,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:33:01,706 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 23:33:01,707 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:33:01,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30070026] [2021-11-20 23:33:01,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30070026] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:33:01,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:33:01,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:33:01,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922567687] [2021-11-20 23:33:01,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:33:01,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:33:01,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:33:01,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:33:01,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:33:01,764 INFO L87 Difference]: Start difference. First operand has 2945 states, 1835 states have (on average 1.3416893732970028) internal successors, (2462), 1912 states have internal predecessors, (2462), 972 states have call successors, (972), 151 states have call predecessors, (972), 150 states have return successors, (963), 949 states have call predecessors, (963), 963 states have call successors, (963) Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 23:33:03,824 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:33:10,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:33:10,352 INFO L93 Difference]: Finished difference Result 5824 states and 8875 transitions. [2021-11-20 23:33:10,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:33:10,355 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 35 [2021-11-20 23:33:10,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:33:10,412 INFO L225 Difference]: With dead ends: 5824 [2021-11-20 23:33:10,412 INFO L226 Difference]: Without dead ends: 2885 [2021-11-20 23:33:10,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:33:10,451 INFO L933 BasicCegarLoop]: 3800 mSDtfsCounter, 4277 mSDsluCounter, 8568 mSDsCounter, 0 mSdLazyCounter, 1493 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4290 SdHoareTripleChecker+Valid, 11386 SdHoareTripleChecker+Invalid, 1495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1493 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:33:10,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4290 Valid, 11386 Invalid, 1495 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 1493 Invalid, 1 Unknown, 0 Unchecked, 8.1s Time] [2021-11-20 23:33:10,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2885 states. [2021-11-20 23:33:10,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2885 to 2885. [2021-11-20 23:33:10,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2885 states, 1785 states have (on average 1.3355742296918767) internal successors, (2384), 1843 states have internal predecessors, (2384), 947 states have call successors, (947), 151 states have call predecessors, (947), 150 states have return successors, (944), 930 states have call predecessors, (944), 944 states have call successors, (944) [2021-11-20 23:33:10,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2885 states to 2885 states and 4275 transitions. [2021-11-20 23:33:10,990 INFO L78 Accepts]: Start accepts. Automaton has 2885 states and 4275 transitions. Word has length 35 [2021-11-20 23:33:10,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:33:10,992 INFO L470 AbstractCegarLoop]: Abstraction has 2885 states and 4275 transitions. [2021-11-20 23:33:10,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 23:33:10,992 INFO L276 IsEmpty]: Start isEmpty. Operand 2885 states and 4275 transitions. [2021-11-20 23:33:10,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 23:33:10,997 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:33:10,997 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:33:10,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:33:10,998 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:33:11,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:33:11,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1127641677, now seen corresponding path program 1 times [2021-11-20 23:33:11,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:33:11,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419397686] [2021-11-20 23:33:11,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:33:11,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:33:11,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:33:11,306 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 23:33:11,307 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:33:11,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419397686] [2021-11-20 23:33:11,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419397686] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:33:11,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:33:11,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:33:11,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444377721] [2021-11-20 23:33:11,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:33:11,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:33:11,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:33:11,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:33:11,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:33:11,313 INFO L87 Difference]: Start difference. First operand 2885 states and 4275 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 23:33:13,354 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:33:22,123 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-20 23:33:22,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:33:22,347 INFO L93 Difference]: Finished difference Result 2891 states and 4280 transitions. [2021-11-20 23:33:22,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:33:22,348 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 41 [2021-11-20 23:33:22,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:33:22,376 INFO L225 Difference]: With dead ends: 2891 [2021-11-20 23:33:22,376 INFO L226 Difference]: Without dead ends: 2889 [2021-11-20 23:33:22,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:33:22,380 INFO L933 BasicCegarLoop]: 3780 mSDtfsCounter, 4249 mSDsluCounter, 8522 mSDsCounter, 0 mSdLazyCounter, 1492 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4260 SdHoareTripleChecker+Valid, 11320 SdHoareTripleChecker+Invalid, 1495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1492 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:33:22,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4260 Valid, 11320 Invalid, 1495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1492 Invalid, 2 Unknown, 0 Unchecked, 10.7s Time] [2021-11-20 23:33:22,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2889 states. [2021-11-20 23:33:22,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2889 to 2889. [2021-11-20 23:33:22,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2889 states, 1788 states have (on average 1.3350111856823266) internal successors, (2387), 1846 states have internal predecessors, (2387), 947 states have call successors, (947), 152 states have call predecessors, (947), 151 states have return successors, (944), 930 states have call predecessors, (944), 944 states have call successors, (944) [2021-11-20 23:33:22,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2889 states to 2889 states and 4278 transitions. [2021-11-20 23:33:22,578 INFO L78 Accepts]: Start accepts. Automaton has 2889 states and 4278 transitions. Word has length 41 [2021-11-20 23:33:22,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:33:22,580 INFO L470 AbstractCegarLoop]: Abstraction has 2889 states and 4278 transitions. [2021-11-20 23:33:22,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 23:33:22,580 INFO L276 IsEmpty]: Start isEmpty. Operand 2889 states and 4278 transitions. [2021-11-20 23:33:22,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 23:33:22,589 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:33:22,589 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:33:22,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 23:33:22,590 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:33:22,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:33:22,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1583761186, now seen corresponding path program 1 times [2021-11-20 23:33:22,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:33:22,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326522550] [2021-11-20 23:33:22,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:33:22,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:33:22,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:33:22,844 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 23:33:22,844 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:33:22,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326522550] [2021-11-20 23:33:22,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326522550] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:33:22,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:33:22,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:33:22,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929974542] [2021-11-20 23:33:22,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:33:22,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:33:22,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:33:22,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:33:22,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:33:22,849 INFO L87 Difference]: Start difference. First operand 2889 states and 4278 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-20 23:33:24,889 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:33:30,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:33:30,601 INFO L93 Difference]: Finished difference Result 2895 states and 4283 transitions. [2021-11-20 23:33:30,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:33:30,602 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 45 [2021-11-20 23:33:30,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:33:30,629 INFO L225 Difference]: With dead ends: 2895 [2021-11-20 23:33:30,629 INFO L226 Difference]: Without dead ends: 2893 [2021-11-20 23:33:30,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:33:30,633 INFO L933 BasicCegarLoop]: 3780 mSDtfsCounter, 4250 mSDsluCounter, 8522 mSDsCounter, 0 mSdLazyCounter, 1493 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4260 SdHoareTripleChecker+Valid, 11320 SdHoareTripleChecker+Invalid, 1495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1493 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:33:30,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4260 Valid, 11320 Invalid, 1495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1493 Invalid, 1 Unknown, 0 Unchecked, 7.5s Time] [2021-11-20 23:33:30,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2893 states. [2021-11-20 23:33:30,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2893 to 2893. [2021-11-20 23:33:30,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2893 states, 1791 states have (on average 1.3344500279173646) internal successors, (2390), 1849 states have internal predecessors, (2390), 947 states have call successors, (947), 153 states have call predecessors, (947), 152 states have return successors, (944), 930 states have call predecessors, (944), 944 states have call successors, (944) [2021-11-20 23:33:30,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2893 states to 2893 states and 4281 transitions. [2021-11-20 23:33:30,817 INFO L78 Accepts]: Start accepts. Automaton has 2893 states and 4281 transitions. Word has length 45 [2021-11-20 23:33:30,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:33:30,818 INFO L470 AbstractCegarLoop]: Abstraction has 2893 states and 4281 transitions. [2021-11-20 23:33:30,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-20 23:33:30,818 INFO L276 IsEmpty]: Start isEmpty. Operand 2893 states and 4281 transitions. [2021-11-20 23:33:30,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-20 23:33:30,821 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:33:30,821 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:33:30,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 23:33:30,821 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:33:30,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:33:30,822 INFO L85 PathProgramCache]: Analyzing trace with hash 688828278, now seen corresponding path program 1 times [2021-11-20 23:33:30,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:33:30,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432909855] [2021-11-20 23:33:30,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:33:30,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:33:30,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:33:31,057 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-20 23:33:31,057 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:33:31,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432909855] [2021-11-20 23:33:31,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432909855] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:33:31,058 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:33:31,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:33:31,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418019414] [2021-11-20 23:33:31,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:33:31,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:33:31,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:33:31,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:33:31,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:33:31,060 INFO L87 Difference]: Start difference. First operand 2893 states and 4281 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 23:33:33,098 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:33:39,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:33:39,161 INFO L93 Difference]: Finished difference Result 2899 states and 4286 transitions. [2021-11-20 23:33:39,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:33:39,162 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 50 [2021-11-20 23:33:39,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:33:39,189 INFO L225 Difference]: With dead ends: 2899 [2021-11-20 23:33:39,189 INFO L226 Difference]: Without dead ends: 2897 [2021-11-20 23:33:39,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:33:39,193 INFO L933 BasicCegarLoop]: 3780 mSDtfsCounter, 4250 mSDsluCounter, 8522 mSDsCounter, 0 mSdLazyCounter, 1493 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4259 SdHoareTripleChecker+Valid, 11320 SdHoareTripleChecker+Invalid, 1495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1493 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2021-11-20 23:33:39,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4259 Valid, 11320 Invalid, 1495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1493 Invalid, 1 Unknown, 0 Unchecked, 7.9s Time] [2021-11-20 23:33:39,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2897 states. [2021-11-20 23:33:39,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2897 to 2897. [2021-11-20 23:33:39,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2897 states, 1794 states have (on average 1.3338907469342252) internal successors, (2393), 1852 states have internal predecessors, (2393), 947 states have call successors, (947), 154 states have call predecessors, (947), 153 states have return successors, (944), 930 states have call predecessors, (944), 944 states have call successors, (944) [2021-11-20 23:33:39,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2897 states to 2897 states and 4284 transitions. [2021-11-20 23:33:39,365 INFO L78 Accepts]: Start accepts. Automaton has 2897 states and 4284 transitions. Word has length 50 [2021-11-20 23:33:39,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:33:39,366 INFO L470 AbstractCegarLoop]: Abstraction has 2897 states and 4284 transitions. [2021-11-20 23:33:39,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 23:33:39,366 INFO L276 IsEmpty]: Start isEmpty. Operand 2897 states and 4284 transitions. [2021-11-20 23:33:39,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-20 23:33:39,367 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:33:39,368 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:33:39,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 23:33:39,368 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:33:39,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:33:39,369 INFO L85 PathProgramCache]: Analyzing trace with hash 155238469, now seen corresponding path program 1 times [2021-11-20 23:33:39,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:33:39,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833175124] [2021-11-20 23:33:39,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:33:39,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:33:39,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:33:39,588 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-20 23:33:39,588 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:33:39,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833175124] [2021-11-20 23:33:39,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833175124] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:33:39,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:33:39,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:33:39,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460919754] [2021-11-20 23:33:39,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:33:39,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:33:39,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:33:39,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:33:39,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:33:39,591 INFO L87 Difference]: Start difference. First operand 2897 states and 4284 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-20 23:33:41,629 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:33:46,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:33:46,402 INFO L93 Difference]: Finished difference Result 2903 states and 4289 transitions. [2021-11-20 23:33:46,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:33:46,403 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 56 [2021-11-20 23:33:46,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:33:46,428 INFO L225 Difference]: With dead ends: 2903 [2021-11-20 23:33:46,428 INFO L226 Difference]: Without dead ends: 2901 [2021-11-20 23:33:46,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:33:46,432 INFO L933 BasicCegarLoop]: 3780 mSDtfsCounter, 4249 mSDsluCounter, 8522 mSDsCounter, 0 mSdLazyCounter, 1493 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4257 SdHoareTripleChecker+Valid, 11320 SdHoareTripleChecker+Invalid, 1495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1493 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:33:46,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4257 Valid, 11320 Invalid, 1495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1493 Invalid, 1 Unknown, 0 Unchecked, 6.7s Time] [2021-11-20 23:33:46,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2901 states. [2021-11-20 23:33:46,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2901 to 2901. [2021-11-20 23:33:46,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2901 states, 1797 states have (on average 1.3333333333333333) internal successors, (2396), 1855 states have internal predecessors, (2396), 947 states have call successors, (947), 155 states have call predecessors, (947), 154 states have return successors, (944), 930 states have call predecessors, (944), 944 states have call successors, (944) [2021-11-20 23:33:46,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2901 states to 2901 states and 4287 transitions. [2021-11-20 23:33:46,613 INFO L78 Accepts]: Start accepts. Automaton has 2901 states and 4287 transitions. Word has length 56 [2021-11-20 23:33:46,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:33:46,613 INFO L470 AbstractCegarLoop]: Abstraction has 2901 states and 4287 transitions. [2021-11-20 23:33:46,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-20 23:33:46,614 INFO L276 IsEmpty]: Start isEmpty. Operand 2901 states and 4287 transitions. [2021-11-20 23:33:46,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-20 23:33:46,615 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:33:46,615 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:33:46,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 23:33:46,616 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:33:46,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:33:46,616 INFO L85 PathProgramCache]: Analyzing trace with hash -322198605, now seen corresponding path program 1 times [2021-11-20 23:33:46,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:33:46,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848951157] [2021-11-20 23:33:46,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:33:46,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:33:46,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:33:46,786 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-20 23:33:46,786 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:33:46,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848951157] [2021-11-20 23:33:46,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848951157] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:33:46,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:33:46,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:33:46,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707045325] [2021-11-20 23:33:46,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:33:46,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:33:46,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:33:46,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:33:46,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:33:46,789 INFO L87 Difference]: Start difference. First operand 2901 states and 4287 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-20 23:33:48,827 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:33:54,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:33:54,573 INFO L93 Difference]: Finished difference Result 2907 states and 4292 transitions. [2021-11-20 23:33:54,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:33:54,574 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 61 [2021-11-20 23:33:54,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:33:54,604 INFO L225 Difference]: With dead ends: 2907 [2021-11-20 23:33:54,604 INFO L226 Difference]: Without dead ends: 2905 [2021-11-20 23:33:54,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:33:54,607 INFO L933 BasicCegarLoop]: 3780 mSDtfsCounter, 4249 mSDsluCounter, 8522 mSDsCounter, 0 mSdLazyCounter, 1493 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4256 SdHoareTripleChecker+Valid, 11320 SdHoareTripleChecker+Invalid, 1495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1493 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:33:54,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4256 Valid, 11320 Invalid, 1495 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1 Valid, 1493 Invalid, 1 Unknown, 0 Unchecked, 7.5s Time] [2021-11-20 23:33:54,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2905 states. [2021-11-20 23:33:54,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2905 to 2905. [2021-11-20 23:33:54,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2905 states, 1800 states have (on average 1.3327777777777778) internal successors, (2399), 1858 states have internal predecessors, (2399), 947 states have call successors, (947), 156 states have call predecessors, (947), 155 states have return successors, (944), 930 states have call predecessors, (944), 944 states have call successors, (944) [2021-11-20 23:33:54,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2905 states to 2905 states and 4290 transitions. [2021-11-20 23:33:54,837 INFO L78 Accepts]: Start accepts. Automaton has 2905 states and 4290 transitions. Word has length 61 [2021-11-20 23:33:54,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:33:54,838 INFO L470 AbstractCegarLoop]: Abstraction has 2905 states and 4290 transitions. [2021-11-20 23:33:54,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-20 23:33:54,839 INFO L276 IsEmpty]: Start isEmpty. Operand 2905 states and 4290 transitions. [2021-11-20 23:33:54,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-20 23:33:54,841 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:33:54,841 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:33:54,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 23:33:54,842 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:33:54,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:33:54,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1687683166, now seen corresponding path program 1 times [2021-11-20 23:33:54,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:33:54,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222266823] [2021-11-20 23:33:54,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:33:54,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:33:54,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:33:55,034 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-20 23:33:55,034 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:33:55,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222266823] [2021-11-20 23:33:55,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222266823] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:33:55,035 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:33:55,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:33:55,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825935285] [2021-11-20 23:33:55,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:33:55,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:33:55,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:33:55,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:33:55,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:33:55,040 INFO L87 Difference]: Start difference. First operand 2905 states and 4290 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-20 23:33:57,082 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:34:03,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:34:03,549 INFO L93 Difference]: Finished difference Result 2911 states and 4295 transitions. [2021-11-20 23:34:03,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:34:03,550 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 65 [2021-11-20 23:34:03,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:34:03,575 INFO L225 Difference]: With dead ends: 2911 [2021-11-20 23:34:03,575 INFO L226 Difference]: Without dead ends: 2909 [2021-11-20 23:34:03,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:34:03,579 INFO L933 BasicCegarLoop]: 3780 mSDtfsCounter, 4250 mSDsluCounter, 8522 mSDsCounter, 0 mSdLazyCounter, 1493 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4256 SdHoareTripleChecker+Valid, 11320 SdHoareTripleChecker+Invalid, 1495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1493 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:34:03,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4256 Valid, 11320 Invalid, 1495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1493 Invalid, 1 Unknown, 0 Unchecked, 8.3s Time] [2021-11-20 23:34:03,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2909 states. [2021-11-20 23:34:03,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2909 to 2909. [2021-11-20 23:34:03,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2909 states, 1803 states have (on average 1.3322240709927897) internal successors, (2402), 1861 states have internal predecessors, (2402), 947 states have call successors, (947), 157 states have call predecessors, (947), 156 states have return successors, (944), 930 states have call predecessors, (944), 944 states have call successors, (944) [2021-11-20 23:34:03,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2909 states to 2909 states and 4293 transitions. [2021-11-20 23:34:03,822 INFO L78 Accepts]: Start accepts. Automaton has 2909 states and 4293 transitions. Word has length 65 [2021-11-20 23:34:03,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:34:03,823 INFO L470 AbstractCegarLoop]: Abstraction has 2909 states and 4293 transitions. [2021-11-20 23:34:03,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-20 23:34:03,824 INFO L276 IsEmpty]: Start isEmpty. Operand 2909 states and 4293 transitions. [2021-11-20 23:34:03,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-20 23:34:03,825 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:34:03,825 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:34:03,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 23:34:03,826 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:34:03,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:34:03,826 INFO L85 PathProgramCache]: Analyzing trace with hash 477206195, now seen corresponding path program 1 times [2021-11-20 23:34:03,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:34:03,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483548836] [2021-11-20 23:34:03,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:34:03,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:34:03,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:34:04,038 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-20 23:34:04,039 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:34:04,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483548836] [2021-11-20 23:34:04,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483548836] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:34:04,039 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:34:04,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:34:04,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85981971] [2021-11-20 23:34:04,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:34:04,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:34:04,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:34:04,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:34:04,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:34:04,042 INFO L87 Difference]: Start difference. First operand 2909 states and 4293 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-20 23:34:06,084 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:34:13,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:34:13,319 INFO L93 Difference]: Finished difference Result 3125 states and 4555 transitions. [2021-11-20 23:34:13,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:34:13,321 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 71 [2021-11-20 23:34:13,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:34:13,350 INFO L225 Difference]: With dead ends: 3125 [2021-11-20 23:34:13,350 INFO L226 Difference]: Without dead ends: 3123 [2021-11-20 23:34:13,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:34:13,353 INFO L933 BasicCegarLoop]: 3880 mSDtfsCounter, 4031 mSDsluCounter, 9201 mSDsCounter, 0 mSdLazyCounter, 1570 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4036 SdHoareTripleChecker+Valid, 12027 SdHoareTripleChecker+Invalid, 1573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1570 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:34:13,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4036 Valid, 12027 Invalid, 1573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1570 Invalid, 1 Unknown, 0 Unchecked, 9.0s Time] [2021-11-20 23:34:13,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3123 states. [2021-11-20 23:34:13,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3123 to 3117. [2021-11-20 23:34:13,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3117 states, 1922 states have (on average 1.3241415192507804) internal successors, (2545), 1987 states have internal predecessors, (2545), 1003 states have call successors, (1003), 193 states have call predecessors, (1003), 189 states have return successors, (1001), 980 states have call predecessors, (1001), 1000 states have call successors, (1001) [2021-11-20 23:34:13,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3117 states to 3117 states and 4549 transitions. [2021-11-20 23:34:13,639 INFO L78 Accepts]: Start accepts. Automaton has 3117 states and 4549 transitions. Word has length 71 [2021-11-20 23:34:13,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:34:13,640 INFO L470 AbstractCegarLoop]: Abstraction has 3117 states and 4549 transitions. [2021-11-20 23:34:13,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-20 23:34:13,641 INFO L276 IsEmpty]: Start isEmpty. Operand 3117 states and 4549 transitions. [2021-11-20 23:34:13,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-20 23:34:13,642 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:34:13,642 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:34:13,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 23:34:13,643 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:34:13,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:34:13,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1086122309, now seen corresponding path program 1 times [2021-11-20 23:34:13,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:34:13,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281256650] [2021-11-20 23:34:13,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:34:13,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:34:13,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:34:13,835 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2021-11-20 23:34:13,835 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:34:13,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281256650] [2021-11-20 23:34:13,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281256650] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:34:13,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:34:13,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:34:13,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314224321] [2021-11-20 23:34:13,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:34:13,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:34:13,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:34:13,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:34:13,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:34:13,839 INFO L87 Difference]: Start difference. First operand 3117 states and 4549 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-20 23:34:15,881 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:34:22,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:34:22,922 INFO L93 Difference]: Finished difference Result 3123 states and 4554 transitions. [2021-11-20 23:34:22,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:34:22,927 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 76 [2021-11-20 23:34:22,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:34:22,971 INFO L225 Difference]: With dead ends: 3123 [2021-11-20 23:34:22,971 INFO L226 Difference]: Without dead ends: 3121 [2021-11-20 23:34:22,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:34:22,977 INFO L933 BasicCegarLoop]: 3780 mSDtfsCounter, 4249 mSDsluCounter, 8522 mSDsCounter, 0 mSdLazyCounter, 1493 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4253 SdHoareTripleChecker+Valid, 11320 SdHoareTripleChecker+Invalid, 1495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1493 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2021-11-20 23:34:22,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4253 Valid, 11320 Invalid, 1495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1493 Invalid, 1 Unknown, 0 Unchecked, 8.8s Time] [2021-11-20 23:34:22,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3121 states. [2021-11-20 23:34:23,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3121 to 3121. [2021-11-20 23:34:23,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3121 states, 1925 states have (on average 1.3236363636363637) internal successors, (2548), 1990 states have internal predecessors, (2548), 1003 states have call successors, (1003), 194 states have call predecessors, (1003), 190 states have return successors, (1001), 980 states have call predecessors, (1001), 1000 states have call successors, (1001) [2021-11-20 23:34:23,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3121 states to 3121 states and 4552 transitions. [2021-11-20 23:34:23,249 INFO L78 Accepts]: Start accepts. Automaton has 3121 states and 4552 transitions. Word has length 76 [2021-11-20 23:34:23,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:34:23,250 INFO L470 AbstractCegarLoop]: Abstraction has 3121 states and 4552 transitions. [2021-11-20 23:34:23,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-20 23:34:23,251 INFO L276 IsEmpty]: Start isEmpty. Operand 3121 states and 4552 transitions. [2021-11-20 23:34:23,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-20 23:34:23,259 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:34:23,260 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:34:23,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 23:34:23,260 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:34:23,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:34:23,261 INFO L85 PathProgramCache]: Analyzing trace with hash 5804342, now seen corresponding path program 1 times [2021-11-20 23:34:23,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:34:23,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710365712] [2021-11-20 23:34:23,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:34:23,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:34:23,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:34:23,459 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-11-20 23:34:23,460 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:34:23,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710365712] [2021-11-20 23:34:23,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710365712] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:34:23,460 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:34:23,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:34:23,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124977253] [2021-11-20 23:34:23,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:34:23,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:34:23,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:34:23,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:34:23,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:34:23,462 INFO L87 Difference]: Start difference. First operand 3121 states and 4552 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 23:34:25,502 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:34:31,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:34:31,864 INFO L93 Difference]: Finished difference Result 3127 states and 4557 transitions. [2021-11-20 23:34:31,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:34:31,865 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 80 [2021-11-20 23:34:31,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:34:31,880 INFO L225 Difference]: With dead ends: 3127 [2021-11-20 23:34:31,880 INFO L226 Difference]: Without dead ends: 3125 [2021-11-20 23:34:31,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:34:31,883 INFO L933 BasicCegarLoop]: 3780 mSDtfsCounter, 4250 mSDsluCounter, 8522 mSDsCounter, 0 mSdLazyCounter, 1493 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4253 SdHoareTripleChecker+Valid, 11320 SdHoareTripleChecker+Invalid, 1495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1493 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:34:31,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4253 Valid, 11320 Invalid, 1495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1493 Invalid, 1 Unknown, 0 Unchecked, 8.0s Time] [2021-11-20 23:34:31,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3125 states. [2021-11-20 23:34:32,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3125 to 3125. [2021-11-20 23:34:32,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3125 states, 1928 states have (on average 1.3231327800829875) internal successors, (2551), 1993 states have internal predecessors, (2551), 1003 states have call successors, (1003), 195 states have call predecessors, (1003), 191 states have return successors, (1001), 980 states have call predecessors, (1001), 1000 states have call successors, (1001) [2021-11-20 23:34:32,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3125 states to 3125 states and 4555 transitions. [2021-11-20 23:34:32,105 INFO L78 Accepts]: Start accepts. Automaton has 3125 states and 4555 transitions. Word has length 80 [2021-11-20 23:34:32,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:34:32,106 INFO L470 AbstractCegarLoop]: Abstraction has 3125 states and 4555 transitions. [2021-11-20 23:34:32,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 23:34:32,106 INFO L276 IsEmpty]: Start isEmpty. Operand 3125 states and 4555 transitions. [2021-11-20 23:34:32,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-20 23:34:32,109 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:34:32,110 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:34:32,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 23:34:32,110 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:34:32,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:34:32,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1184295483, now seen corresponding path program 1 times [2021-11-20 23:34:32,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:34:32,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561575887] [2021-11-20 23:34:32,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:34:32,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:34:32,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:34:32,286 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2021-11-20 23:34:32,286 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:34:32,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561575887] [2021-11-20 23:34:32,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561575887] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:34:32,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:34:32,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:34:32,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330672738] [2021-11-20 23:34:32,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:34:32,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:34:32,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:34:32,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:34:32,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:34:32,289 INFO L87 Difference]: Start difference. First operand 3125 states and 4555 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-20 23:34:34,331 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:34:40,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:34:40,377 INFO L93 Difference]: Finished difference Result 3131 states and 4560 transitions. [2021-11-20 23:34:40,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:34:40,378 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 86 [2021-11-20 23:34:40,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:34:40,391 INFO L225 Difference]: With dead ends: 3131 [2021-11-20 23:34:40,391 INFO L226 Difference]: Without dead ends: 3129 [2021-11-20 23:34:40,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:34:40,393 INFO L933 BasicCegarLoop]: 3780 mSDtfsCounter, 4249 mSDsluCounter, 8522 mSDsCounter, 0 mSdLazyCounter, 1493 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4251 SdHoareTripleChecker+Valid, 11320 SdHoareTripleChecker+Invalid, 1495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1493 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2021-11-20 23:34:40,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4251 Valid, 11320 Invalid, 1495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1493 Invalid, 1 Unknown, 0 Unchecked, 7.9s Time] [2021-11-20 23:34:40,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3129 states. [2021-11-20 23:34:40,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3129 to 3129. [2021-11-20 23:34:40,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3129 states, 1931 states have (on average 1.322630761263594) internal successors, (2554), 1996 states have internal predecessors, (2554), 1003 states have call successors, (1003), 196 states have call predecessors, (1003), 192 states have return successors, (1001), 980 states have call predecessors, (1001), 1000 states have call successors, (1001) [2021-11-20 23:34:40,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3129 states to 3129 states and 4558 transitions. [2021-11-20 23:34:40,621 INFO L78 Accepts]: Start accepts. Automaton has 3129 states and 4558 transitions. Word has length 86 [2021-11-20 23:34:40,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:34:40,622 INFO L470 AbstractCegarLoop]: Abstraction has 3129 states and 4558 transitions. [2021-11-20 23:34:40,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-20 23:34:40,622 INFO L276 IsEmpty]: Start isEmpty. Operand 3129 states and 4558 transitions. [2021-11-20 23:34:40,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-20 23:34:40,624 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:34:40,624 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:34:40,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 23:34:40,625 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:34:40,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:34:40,625 INFO L85 PathProgramCache]: Analyzing trace with hash -55882573, now seen corresponding path program 1 times [2021-11-20 23:34:40,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:34:40,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450796005] [2021-11-20 23:34:40,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:34:40,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:34:40,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:34:40,785 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-20 23:34:40,785 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:34:40,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450796005] [2021-11-20 23:34:40,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450796005] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:34:40,786 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:34:40,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:34:40,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467544594] [2021-11-20 23:34:40,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:34:40,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:34:40,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:34:40,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:34:40,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:34:40,788 INFO L87 Difference]: Start difference. First operand 3129 states and 4558 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-20 23:34:42,829 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:34:49,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:34:49,045 INFO L93 Difference]: Finished difference Result 3135 states and 4563 transitions. [2021-11-20 23:34:49,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:34:49,046 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 91 [2021-11-20 23:34:49,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:34:49,058 INFO L225 Difference]: With dead ends: 3135 [2021-11-20 23:34:49,058 INFO L226 Difference]: Without dead ends: 3131 [2021-11-20 23:34:49,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:34:49,061 INFO L933 BasicCegarLoop]: 3780 mSDtfsCounter, 4249 mSDsluCounter, 8522 mSDsCounter, 0 mSdLazyCounter, 1493 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4250 SdHoareTripleChecker+Valid, 11320 SdHoareTripleChecker+Invalid, 1495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1493 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:34:49,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4250 Valid, 11320 Invalid, 1495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1493 Invalid, 1 Unknown, 0 Unchecked, 8.0s Time] [2021-11-20 23:34:49,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3131 states. [2021-11-20 23:34:49,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3131 to 3131. [2021-11-20 23:34:49,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3131 states, 1933 states have (on average 1.321779617175375) internal successors, (2555), 1997 states have internal predecessors, (2555), 1003 states have call successors, (1003), 197 states have call predecessors, (1003), 192 states have return successors, (1001), 980 states have call predecessors, (1001), 1000 states have call successors, (1001) [2021-11-20 23:34:49,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3131 states to 3131 states and 4559 transitions. [2021-11-20 23:34:49,292 INFO L78 Accepts]: Start accepts. Automaton has 3131 states and 4559 transitions. Word has length 91 [2021-11-20 23:34:49,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:34:49,292 INFO L470 AbstractCegarLoop]: Abstraction has 3131 states and 4559 transitions. [2021-11-20 23:34:49,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-20 23:34:49,293 INFO L276 IsEmpty]: Start isEmpty. Operand 3131 states and 4559 transitions. [2021-11-20 23:34:49,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-20 23:34:49,295 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:34:49,295 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:34:49,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 23:34:49,295 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:34:49,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:34:49,296 INFO L85 PathProgramCache]: Analyzing trace with hash 781800005, now seen corresponding path program 1 times [2021-11-20 23:34:49,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:34:49,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004584177] [2021-11-20 23:34:49,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:34:49,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:34:49,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:34:49,464 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-11-20 23:34:49,464 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:34:49,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004584177] [2021-11-20 23:34:49,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004584177] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:34:49,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:34:49,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:34:49,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770564936] [2021-11-20 23:34:49,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:34:49,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:34:49,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:34:49,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:34:49,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:34:49,467 INFO L87 Difference]: Start difference. First operand 3131 states and 4559 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-20 23:34:51,505 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:34:58,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:34:58,134 INFO L93 Difference]: Finished difference Result 3131 states and 4559 transitions. [2021-11-20 23:34:58,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:34:58,135 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 96 [2021-11-20 23:34:58,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:34:58,146 INFO L225 Difference]: With dead ends: 3131 [2021-11-20 23:34:58,146 INFO L226 Difference]: Without dead ends: 3049 [2021-11-20 23:34:58,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:34:58,149 INFO L933 BasicCegarLoop]: 3778 mSDtfsCounter, 4245 mSDsluCounter, 8521 mSDsCounter, 0 mSdLazyCounter, 1488 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4245 SdHoareTripleChecker+Valid, 11317 SdHoareTripleChecker+Invalid, 1490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1488 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:34:58,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4245 Valid, 11317 Invalid, 1490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1488 Invalid, 1 Unknown, 0 Unchecked, 8.5s Time] [2021-11-20 23:34:58,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3049 states. [2021-11-20 23:34:58,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3049 to 3049. [2021-11-20 23:34:58,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3049 states, 1886 states have (on average 1.3282078472958643) internal successors, (2505), 1948 states have internal predecessors, (2505), 981 states have call successors, (981), 183 states have call predecessors, (981), 180 states have return successors, (982), 961 states have call predecessors, (982), 981 states have call successors, (982) [2021-11-20 23:34:58,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3049 states to 3049 states and 4468 transitions. [2021-11-20 23:34:58,471 INFO L78 Accepts]: Start accepts. Automaton has 3049 states and 4468 transitions. Word has length 96 [2021-11-20 23:34:58,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:34:58,472 INFO L470 AbstractCegarLoop]: Abstraction has 3049 states and 4468 transitions. [2021-11-20 23:34:58,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-20 23:34:58,472 INFO L276 IsEmpty]: Start isEmpty. Operand 3049 states and 4468 transitions. [2021-11-20 23:34:58,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-20 23:34:58,482 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:34:58,483 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:34:58,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 23:34:58,483 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:34:58,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:34:58,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1117993039, now seen corresponding path program 1 times [2021-11-20 23:34:58,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:34:58,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331201718] [2021-11-20 23:34:58,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:34:58,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:34:58,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:34:58,730 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-20 23:34:58,730 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:34:58,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331201718] [2021-11-20 23:34:58,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331201718] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:34:58,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:34:58,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:34:58,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30658644] [2021-11-20 23:34:58,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:34:58,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:34:58,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:34:58,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:34:58,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:34:58,733 INFO L87 Difference]: Start difference. First operand 3049 states and 4468 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-20 23:35:00,778 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:35:03,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:35:03,141 INFO L93 Difference]: Finished difference Result 6083 states and 8913 transitions. [2021-11-20 23:35:03,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:35:03,142 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 143 [2021-11-20 23:35:03,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:35:03,162 INFO L225 Difference]: With dead ends: 6083 [2021-11-20 23:35:03,162 INFO L226 Difference]: Without dead ends: 3048 [2021-11-20 23:35:03,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:35:03,194 INFO L933 BasicCegarLoop]: 3723 mSDtfsCounter, 4196 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4196 SdHoareTripleChecker+Valid, 3723 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:35:03,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4196 Valid, 3723 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 488 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2021-11-20 23:35:03,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3048 states. [2021-11-20 23:35:03,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3048 to 3048. [2021-11-20 23:35:03,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3048 states, 1885 states have (on average 1.3273209549071618) internal successors, (2502), 1947 states have internal predecessors, (2502), 981 states have call successors, (981), 183 states have call predecessors, (981), 180 states have return successors, (982), 961 states have call predecessors, (982), 981 states have call successors, (982) [2021-11-20 23:35:03,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3048 states to 3048 states and 4465 transitions. [2021-11-20 23:35:03,469 INFO L78 Accepts]: Start accepts. Automaton has 3048 states and 4465 transitions. Word has length 143 [2021-11-20 23:35:03,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:35:03,470 INFO L470 AbstractCegarLoop]: Abstraction has 3048 states and 4465 transitions. [2021-11-20 23:35:03,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-20 23:35:03,471 INFO L276 IsEmpty]: Start isEmpty. Operand 3048 states and 4465 transitions. [2021-11-20 23:35:03,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-20 23:35:03,479 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:35:03,479 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:35:03,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 23:35:03,480 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:35:03,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:35:03,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1052799301, now seen corresponding path program 1 times [2021-11-20 23:35:03,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:35:03,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85289766] [2021-11-20 23:35:03,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:35:03,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:35:03,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:35:03,760 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-20 23:35:03,760 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:35:03,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85289766] [2021-11-20 23:35:03,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85289766] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:35:03,761 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:35:03,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:35:03,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126860506] [2021-11-20 23:35:03,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:35:03,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:35:03,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:35:03,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:35:03,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:35:03,763 INFO L87 Difference]: Start difference. First operand 3048 states and 4465 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-20 23:35:05,803 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:35:12,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:35:12,416 INFO L93 Difference]: Finished difference Result 3054 states and 4469 transitions. [2021-11-20 23:35:12,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:35:12,417 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 144 [2021-11-20 23:35:12,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:35:12,431 INFO L225 Difference]: With dead ends: 3054 [2021-11-20 23:35:12,432 INFO L226 Difference]: Without dead ends: 3052 [2021-11-20 23:35:12,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:35:12,435 INFO L933 BasicCegarLoop]: 3821 mSDtfsCounter, 3933 mSDsluCounter, 9093 mSDsCounter, 0 mSdLazyCounter, 1547 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3934 SdHoareTripleChecker+Valid, 11868 SdHoareTripleChecker+Invalid, 1550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1547 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:35:12,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3934 Valid, 11868 Invalid, 1550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1547 Invalid, 1 Unknown, 0 Unchecked, 8.4s Time] [2021-11-20 23:35:12,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3052 states. [2021-11-20 23:35:12,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3052 to 3048. [2021-11-20 23:35:12,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3048 states, 1885 states have (on average 1.3267904509283819) internal successors, (2501), 1947 states have internal predecessors, (2501), 981 states have call successors, (981), 183 states have call predecessors, (981), 180 states have return successors, (982), 961 states have call predecessors, (982), 981 states have call successors, (982) [2021-11-20 23:35:12,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3048 states to 3048 states and 4464 transitions. [2021-11-20 23:35:12,679 INFO L78 Accepts]: Start accepts. Automaton has 3048 states and 4464 transitions. Word has length 144 [2021-11-20 23:35:12,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:35:12,680 INFO L470 AbstractCegarLoop]: Abstraction has 3048 states and 4464 transitions. [2021-11-20 23:35:12,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-20 23:35:12,680 INFO L276 IsEmpty]: Start isEmpty. Operand 3048 states and 4464 transitions. [2021-11-20 23:35:12,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-11-20 23:35:12,707 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:35:12,707 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 7, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:35:12,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 23:35:12,708 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:35:12,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:35:12,708 INFO L85 PathProgramCache]: Analyzing trace with hash -549499399, now seen corresponding path program 1 times [2021-11-20 23:35:12,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:35:12,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192204415] [2021-11-20 23:35:12,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:35:12,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:35:12,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:35:13,022 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-11-20 23:35:13,022 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:35:13,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192204415] [2021-11-20 23:35:13,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192204415] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:35:13,025 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:35:13,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:35:13,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464031405] [2021-11-20 23:35:13,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:35:13,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:35:13,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:35:13,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:35:13,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:35:13,027 INFO L87 Difference]: Start difference. First operand 3048 states and 4464 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-20 23:35:15,070 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:35:23,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:35:23,547 INFO L93 Difference]: Finished difference Result 3052 states and 4467 transitions. [2021-11-20 23:35:23,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:35:23,548 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 206 [2021-11-20 23:35:23,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:35:23,563 INFO L225 Difference]: With dead ends: 3052 [2021-11-20 23:35:23,563 INFO L226 Difference]: Without dead ends: 3050 [2021-11-20 23:35:23,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:35:23,566 INFO L933 BasicCegarLoop]: 3891 mSDtfsCounter, 462 mSDsluCounter, 12819 mSDsCounter, 0 mSdLazyCounter, 2042 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 15202 SdHoareTripleChecker+Invalid, 2044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2042 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:35:23,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [463 Valid, 15202 Invalid, 2044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2042 Invalid, 1 Unknown, 0 Unchecked, 10.2s Time] [2021-11-20 23:35:23,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3050 states. [2021-11-20 23:35:23,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3050 to 3048. [2021-11-20 23:35:23,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3048 states, 1885 states have (on average 1.3262599469496021) internal successors, (2500), 1947 states have internal predecessors, (2500), 981 states have call successors, (981), 183 states have call predecessors, (981), 180 states have return successors, (982), 961 states have call predecessors, (982), 981 states have call successors, (982) [2021-11-20 23:35:23,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3048 states to 3048 states and 4463 transitions. [2021-11-20 23:35:23,805 INFO L78 Accepts]: Start accepts. Automaton has 3048 states and 4463 transitions. Word has length 206 [2021-11-20 23:35:23,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:35:23,806 INFO L470 AbstractCegarLoop]: Abstraction has 3048 states and 4463 transitions. [2021-11-20 23:35:23,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-20 23:35:23,807 INFO L276 IsEmpty]: Start isEmpty. Operand 3048 states and 4463 transitions. [2021-11-20 23:35:23,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2021-11-20 23:35:23,854 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:35:23,854 INFO L514 BasicCegarLoop]: trace histogram [16, 14, 14, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:35:23,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 23:35:23,855 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:35:23,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:35:23,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1927555673, now seen corresponding path program 1 times [2021-11-20 23:35:23,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:35:23,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064193819] [2021-11-20 23:35:23,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:35:23,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:35:24,010 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:35:24,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1786682221] [2021-11-20 23:35:24,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:35:24,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:35:24,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:35:24,016 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:35:24,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 23:35:25,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:35:25,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 4742 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 23:35:25,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:35:26,842 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 379 proven. 0 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2021-11-20 23:35:26,843 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:35:26,843 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:35:26,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064193819] [2021-11-20 23:35:26,843 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:35:26,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786682221] [2021-11-20 23:35:26,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786682221] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:35:26,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:35:26,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:35:26,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010210847] [2021-11-20 23:35:26,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:35:26,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:35:26,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:35:26,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:35:26,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:35:26,847 INFO L87 Difference]: Start difference. First operand 3048 states and 4463 transitions. Second operand has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 2 states have call successors, (97), 2 states have call predecessors, (97), 2 states have return successors, (89), 2 states have call predecessors, (89), 2 states have call successors, (89) [2021-11-20 23:35:28,881 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:35:33,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:35:33,659 INFO L93 Difference]: Finished difference Result 6085 states and 9018 transitions. [2021-11-20 23:35:33,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:35:33,660 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 2 states have call successors, (97), 2 states have call predecessors, (97), 2 states have return successors, (89), 2 states have call predecessors, (89), 2 states have call successors, (89) Word has length 468 [2021-11-20 23:35:33,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:35:33,681 INFO L225 Difference]: With dead ends: 6085 [2021-11-20 23:35:33,681 INFO L226 Difference]: Without dead ends: 3051 [2021-11-20 23:35:33,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 466 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:35:33,708 INFO L933 BasicCegarLoop]: 3724 mSDtfsCounter, 0 mSDsluCounter, 4202 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7442 SdHoareTripleChecker+Invalid, 982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2021-11-20 23:35:33,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 7442 Invalid, 982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 977 Invalid, 1 Unknown, 0 Unchecked, 6.6s Time] [2021-11-20 23:35:33,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3051 states. [2021-11-20 23:35:33,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3051 to 3051. [2021-11-20 23:35:33,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3051 states, 1888 states have (on average 1.3257415254237288) internal successors, (2503), 1950 states have internal predecessors, (2503), 981 states have call successors, (981), 183 states have call predecessors, (981), 180 states have return successors, (982), 961 states have call predecessors, (982), 981 states have call successors, (982) [2021-11-20 23:35:33,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3051 states to 3051 states and 4466 transitions. [2021-11-20 23:35:33,960 INFO L78 Accepts]: Start accepts. Automaton has 3051 states and 4466 transitions. Word has length 468 [2021-11-20 23:35:33,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:35:33,962 INFO L470 AbstractCegarLoop]: Abstraction has 3051 states and 4466 transitions. [2021-11-20 23:35:33,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 2 states have call successors, (97), 2 states have call predecessors, (97), 2 states have return successors, (89), 2 states have call predecessors, (89), 2 states have call successors, (89) [2021-11-20 23:35:33,963 INFO L276 IsEmpty]: Start isEmpty. Operand 3051 states and 4466 transitions. [2021-11-20 23:35:34,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2021-11-20 23:35:34,009 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:35:34,009 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:35:34,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 23:35:34,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:35:34,235 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:35:34,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:35:34,236 INFO L85 PathProgramCache]: Analyzing trace with hash 633120216, now seen corresponding path program 1 times [2021-11-20 23:35:34,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:35:34,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277981435] [2021-11-20 23:35:34,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:35:34,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:35:34,401 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:35:34,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1147111128] [2021-11-20 23:35:34,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:35:34,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:35:34,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:35:34,403 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:35:34,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 23:35:36,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:35:36,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 4964 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 23:35:36,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:35:37,186 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2021-11-20 23:35:37,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:35:37,187 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:35:37,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277981435] [2021-11-20 23:35:37,187 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:35:37,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147111128] [2021-11-20 23:35:37,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147111128] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:35:37,188 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:35:37,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:35:37,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180140354] [2021-11-20 23:35:37,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:35:37,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:35:37,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:35:37,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:35:37,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:35:37,193 INFO L87 Difference]: Start difference. First operand 3051 states and 4466 transitions. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 2 states have call successors, (94), 2 states have call predecessors, (94), 2 states have return successors, (87), 2 states have call predecessors, (87), 2 states have call successors, (87) [2021-11-20 23:35:39,233 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:35:44,410 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:35:45,740 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:35:45,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:35:45,947 INFO L93 Difference]: Finished difference Result 6211 states and 9186 transitions. [2021-11-20 23:35:45,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:35:45,948 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 2 states have call successors, (94), 2 states have call predecessors, (94), 2 states have return successors, (87), 2 states have call predecessors, (87), 2 states have call successors, (87) Word has length 489 [2021-11-20 23:35:45,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:35:45,969 INFO L225 Difference]: With dead ends: 6211 [2021-11-20 23:35:45,969 INFO L226 Difference]: Without dead ends: 3174 [2021-11-20 23:35:45,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 487 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:35:45,996 INFO L933 BasicCegarLoop]: 3779 mSDtfsCounter, 99 mSDsluCounter, 4216 mSDsCounter, 0 mSdLazyCounter, 978 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 7510 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 978 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:35:45,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 7510 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 978 Invalid, 1 Unknown, 0 Unchecked, 8.5s Time] [2021-11-20 23:35:46,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3174 states. [2021-11-20 23:35:46,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3174 to 3052. [2021-11-20 23:35:46,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3052 states, 1889 states have (on average 1.3255690841715193) internal successors, (2504), 1951 states have internal predecessors, (2504), 981 states have call successors, (981), 183 states have call predecessors, (981), 180 states have return successors, (982), 961 states have call predecessors, (982), 981 states have call successors, (982) [2021-11-20 23:35:46,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3052 states to 3052 states and 4467 transitions. [2021-11-20 23:35:46,247 INFO L78 Accepts]: Start accepts. Automaton has 3052 states and 4467 transitions. Word has length 489 [2021-11-20 23:35:46,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:35:46,249 INFO L470 AbstractCegarLoop]: Abstraction has 3052 states and 4467 transitions. [2021-11-20 23:35:46,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 2 states have call successors, (94), 2 states have call predecessors, (94), 2 states have return successors, (87), 2 states have call predecessors, (87), 2 states have call successors, (87) [2021-11-20 23:35:46,249 INFO L276 IsEmpty]: Start isEmpty. Operand 3052 states and 4467 transitions. [2021-11-20 23:35:46,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2021-11-20 23:35:46,297 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:35:46,298 INFO L514 BasicCegarLoop]: trace histogram [16, 14, 14, 8, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:35:46,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 23:35:46,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-20 23:35:46,511 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:35:46,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:35:46,512 INFO L85 PathProgramCache]: Analyzing trace with hash 218554641, now seen corresponding path program 1 times [2021-11-20 23:35:46,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:35:46,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173320319] [2021-11-20 23:35:46,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:35:46,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:35:46,675 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:35:46,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [595963913] [2021-11-20 23:35:46,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:35:46,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:35:46,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:35:46,677 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:35:46,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 23:35:48,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:35:48,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 4781 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:35:48,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:35:49,253 INFO L134 CoverageAnalysis]: Checked inductivity of 740 backedges. 385 proven. 0 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2021-11-20 23:35:49,253 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:35:49,254 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:35:49,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173320319] [2021-11-20 23:35:49,254 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:35:49,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595963913] [2021-11-20 23:35:49,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595963913] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:35:49,254 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:35:49,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:35:49,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140715375] [2021-11-20 23:35:49,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:35:49,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:35:49,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:35:49,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:35:49,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:35:49,257 INFO L87 Difference]: Start difference. First operand 3052 states and 4467 transitions. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 3 states have call successors, (99), 2 states have call predecessors, (99), 2 states have return successors, (91), 3 states have call predecessors, (91), 3 states have call successors, (91) [2021-11-20 23:35:51,295 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:35:56,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:35:56,367 INFO L93 Difference]: Finished difference Result 6096 states and 9017 transitions. [2021-11-20 23:35:56,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:35:56,368 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 3 states have call successors, (99), 2 states have call predecessors, (99), 2 states have return successors, (91), 3 states have call predecessors, (91), 3 states have call successors, (91) Word has length 478 [2021-11-20 23:35:56,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:35:56,387 INFO L225 Difference]: With dead ends: 6096 [2021-11-20 23:35:56,387 INFO L226 Difference]: Without dead ends: 3058 [2021-11-20 23:35:56,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 476 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:35:56,405 INFO L933 BasicCegarLoop]: 3724 mSDtfsCounter, 4 mSDsluCounter, 4203 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 7441 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2021-11-20 23:35:56,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 7441 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 981 Invalid, 1 Unknown, 0 Unchecked, 6.9s Time] [2021-11-20 23:35:56,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3058 states. [2021-11-20 23:35:56,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3058 to 3056. [2021-11-20 23:35:56,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3056 states, 1892 states have (on average 1.3255813953488371) internal successors, (2508), 1954 states have internal predecessors, (2508), 982 states have call successors, (982), 183 states have call predecessors, (982), 180 states have return successors, (983), 962 states have call predecessors, (983), 982 states have call successors, (983) [2021-11-20 23:35:56,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3056 states to 3056 states and 4473 transitions. [2021-11-20 23:35:56,659 INFO L78 Accepts]: Start accepts. Automaton has 3056 states and 4473 transitions. Word has length 478 [2021-11-20 23:35:56,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:35:56,660 INFO L470 AbstractCegarLoop]: Abstraction has 3056 states and 4473 transitions. [2021-11-20 23:35:56,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 3 states have call successors, (99), 2 states have call predecessors, (99), 2 states have return successors, (91), 3 states have call predecessors, (91), 3 states have call successors, (91) [2021-11-20 23:35:56,661 INFO L276 IsEmpty]: Start isEmpty. Operand 3056 states and 4473 transitions. [2021-11-20 23:35:56,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2021-11-20 23:35:56,721 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:35:56,722 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 8, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:35:56,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 23:35:56,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:35:56,935 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:35:56,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:35:56,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1502126236, now seen corresponding path program 1 times [2021-11-20 23:35:56,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:35:56,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691273513] [2021-11-20 23:35:56,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:35:56,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:35:57,072 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:35:57,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [158546223] [2021-11-20 23:35:57,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:35:57,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:35:57,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:35:57,075 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:35:57,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 23:35:58,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:35:58,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 5013 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 23:35:58,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:35:59,650 INFO L134 CoverageAnalysis]: Checked inductivity of 810 backedges. 430 proven. 0 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2021-11-20 23:35:59,650 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:35:59,650 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:35:59,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691273513] [2021-11-20 23:35:59,650 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:35:59,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158546223] [2021-11-20 23:35:59,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158546223] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:35:59,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:35:59,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:35:59,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850743980] [2021-11-20 23:35:59,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:35:59,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:35:59,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:35:59,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:35:59,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:35:59,653 INFO L87 Difference]: Start difference. First operand 3056 states and 4473 transitions. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 2 states have call successors, (103), 2 states have call predecessors, (103), 2 states have return successors, (95), 2 states have call predecessors, (95), 2 states have call successors, (95) [2021-11-20 23:36:01,682 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:36:06,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:36:06,440 INFO L93 Difference]: Finished difference Result 6097 states and 9018 transitions. [2021-11-20 23:36:06,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:36:06,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 2 states have call successors, (103), 2 states have call predecessors, (103), 2 states have return successors, (95), 2 states have call predecessors, (95), 2 states have call successors, (95) Word has length 502 [2021-11-20 23:36:06,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:36:06,453 INFO L225 Difference]: With dead ends: 6097 [2021-11-20 23:36:06,453 INFO L226 Difference]: Without dead ends: 3055 [2021-11-20 23:36:06,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 500 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:36:06,470 INFO L933 BasicCegarLoop]: 3724 mSDtfsCounter, 1 mSDsluCounter, 4199 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 7439 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2021-11-20 23:36:06,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 7439 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 983 Invalid, 1 Unknown, 0 Unchecked, 6.6s Time] [2021-11-20 23:36:06,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3055 states. [2021-11-20 23:36:06,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3055 to 3053. [2021-11-20 23:36:06,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3053 states, 1890 states have (on average 1.3253968253968254) internal successors, (2505), 1952 states have internal predecessors, (2505), 981 states have call successors, (981), 183 states have call predecessors, (981), 180 states have return successors, (982), 961 states have call predecessors, (982), 981 states have call successors, (982) [2021-11-20 23:36:06,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3053 states to 3053 states and 4468 transitions. [2021-11-20 23:36:06,711 INFO L78 Accepts]: Start accepts. Automaton has 3053 states and 4468 transitions. Word has length 502 [2021-11-20 23:36:06,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:36:06,712 INFO L470 AbstractCegarLoop]: Abstraction has 3053 states and 4468 transitions. [2021-11-20 23:36:06,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 2 states have call successors, (103), 2 states have call predecessors, (103), 2 states have return successors, (95), 2 states have call predecessors, (95), 2 states have call successors, (95) [2021-11-20 23:36:06,713 INFO L276 IsEmpty]: Start isEmpty. Operand 3053 states and 4468 transitions. [2021-11-20 23:36:06,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2021-11-20 23:36:06,741 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:06,741 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 8, 7, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:36:06,786 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-20 23:36:06,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:36:06,955 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:36:06,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:06,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1430801191, now seen corresponding path program 1 times [2021-11-20 23:36:06,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:36:06,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544305868] [2021-11-20 23:36:06,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:06,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:36:07,064 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:36:07,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2049555645] [2021-11-20 23:36:07,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:07,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:36:07,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:36:07,066 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:36:07,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 23:36:08,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:08,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 5009 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:36:08,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:36:09,484 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 424 proven. 1 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-11-20 23:36:09,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:36:10,846 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 793 trivial. 0 not checked. [2021-11-20 23:36:10,846 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:36:10,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544305868] [2021-11-20 23:36:10,846 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:36:10,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049555645] [2021-11-20 23:36:10,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049555645] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:36:10,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [533315690] [2021-11-20 23:36:10,900 INFO L159 IcfgInterpreter]: Started Sifa with 319 locations of interest [2021-11-20 23:36:10,901 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:36:10,910 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-20 23:36:10,917 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:36:10,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-20 23:36:10,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140604000] [2021-11-20 23:36:10,918 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:36:10,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:36:10,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:36:10,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:36:10,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:36:10,921 INFO L87 Difference]: Start difference. First operand 3053 states and 4468 transitions. Second operand has 6 states, 6 states have (on average 45.166666666666664) internal successors, (271), 6 states have internal predecessors, (271), 2 states have call successors, (154), 2 states have call predecessors, (154), 2 states have return successors, (148), 2 states have call predecessors, (148), 2 states have call successors, (148) [2021-11-20 23:36:12,963 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:36:22,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:36:22,922 INFO L93 Difference]: Finished difference Result 6101 states and 9040 transitions. [2021-11-20 23:36:22,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:36:22,924 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 45.166666666666664) internal successors, (271), 6 states have internal predecessors, (271), 2 states have call successors, (154), 2 states have call predecessors, (154), 2 states have return successors, (148), 2 states have call predecessors, (148), 2 states have call successors, (148) Word has length 503 [2021-11-20 23:36:22,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:36:22,943 INFO L225 Difference]: With dead ends: 6101 [2021-11-20 23:36:22,944 INFO L226 Difference]: Without dead ends: 3062 [2021-11-20 23:36:22,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1004 GetRequests, 1000 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:36:22,966 INFO L933 BasicCegarLoop]: 3724 mSDtfsCounter, 0 mSDsluCounter, 16808 mSDsCounter, 0 mSdLazyCounter, 2447 mSolverCounterSat, 17 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18596 SdHoareTripleChecker+Invalid, 2465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2447 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:36:22,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 18596 Invalid, 2465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 2447 Invalid, 1 Unknown, 0 Unchecked, 11.7s Time] [2021-11-20 23:36:22,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3062 states. [2021-11-20 23:36:23,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3062 to 3062. [2021-11-20 23:36:23,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3062 states, 1899 states have (on average 1.3238546603475514) internal successors, (2514), 1961 states have internal predecessors, (2514), 981 states have call successors, (981), 183 states have call predecessors, (981), 180 states have return successors, (982), 961 states have call predecessors, (982), 981 states have call successors, (982) [2021-11-20 23:36:23,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3062 states to 3062 states and 4477 transitions. [2021-11-20 23:36:23,464 INFO L78 Accepts]: Start accepts. Automaton has 3062 states and 4477 transitions. Word has length 503 [2021-11-20 23:36:23,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:36:23,465 INFO L470 AbstractCegarLoop]: Abstraction has 3062 states and 4477 transitions. [2021-11-20 23:36:23,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 45.166666666666664) internal successors, (271), 6 states have internal predecessors, (271), 2 states have call successors, (154), 2 states have call predecessors, (154), 2 states have return successors, (148), 2 states have call predecessors, (148), 2 states have call successors, (148) [2021-11-20 23:36:23,466 INFO L276 IsEmpty]: Start isEmpty. Operand 3062 states and 4477 transitions. [2021-11-20 23:36:23,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2021-11-20 23:36:23,490 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:23,490 INFO L514 BasicCegarLoop]: trace histogram [16, 14, 14, 8, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:36:23,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 23:36:23,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-20 23:36:23,703 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:36:23,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:23,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1698754518, now seen corresponding path program 1 times [2021-11-20 23:36:23,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:36:23,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329732622] [2021-11-20 23:36:23,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:23,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:36:23,829 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:36:23,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [768454121] [2021-11-20 23:36:23,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:23,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:36:23,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:36:23,831 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:36:23,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 23:36:25,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:25,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 4815 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 23:36:25,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:36:26,269 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 389 proven. 10 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2021-11-20 23:36:26,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:36:27,777 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2021-11-20 23:36:27,777 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:36:27,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329732622] [2021-11-20 23:36:27,778 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:36:27,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768454121] [2021-11-20 23:36:27,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768454121] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:36:27,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [112787616] [2021-11-20 23:36:27,786 INFO L159 IcfgInterpreter]: Started Sifa with 310 locations of interest [2021-11-20 23:36:27,786 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:36:27,788 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-20 23:36:27,789 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:36:27,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-11-20 23:36:27,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030132999] [2021-11-20 23:36:27,790 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:36:27,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 23:36:27,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:36:27,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 23:36:27,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:36:27,792 INFO L87 Difference]: Start difference. First operand 3062 states and 4477 transitions. Second operand has 8 states, 8 states have (on average 32.875) internal successors, (263), 8 states have internal predecessors, (263), 2 states have call successors, (147), 2 states have call predecessors, (147), 2 states have return successors, (141), 2 states have call predecessors, (141), 2 states have call successors, (141) [2021-11-20 23:36:29,835 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:36:38,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:36:38,044 INFO L93 Difference]: Finished difference Result 6116 states and 9052 transitions. [2021-11-20 23:36:38,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 23:36:38,045 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 32.875) internal successors, (263), 8 states have internal predecessors, (263), 2 states have call successors, (147), 2 states have call predecessors, (147), 2 states have return successors, (141), 2 states have call predecessors, (141), 2 states have call successors, (141) Word has length 486 [2021-11-20 23:36:38,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:36:38,065 INFO L225 Difference]: With dead ends: 6116 [2021-11-20 23:36:38,065 INFO L226 Difference]: Without dead ends: 3068 [2021-11-20 23:36:38,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 970 GetRequests, 964 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:36:38,082 INFO L933 BasicCegarLoop]: 3724 mSDtfsCounter, 0 mSDsluCounter, 12606 mSDsCounter, 0 mSdLazyCounter, 1966 mSolverCounterSat, 23 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14878 SdHoareTripleChecker+Invalid, 1990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1966 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:36:38,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14878 Invalid, 1990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1966 Invalid, 1 Unknown, 0 Unchecked, 10.0s Time] [2021-11-20 23:36:38,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3068 states. [2021-11-20 23:36:38,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3068 to 3068. [2021-11-20 23:36:38,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3068 states, 1905 states have (on average 1.3228346456692914) internal successors, (2520), 1967 states have internal predecessors, (2520), 981 states have call successors, (981), 183 states have call predecessors, (981), 180 states have return successors, (982), 961 states have call predecessors, (982), 981 states have call successors, (982) [2021-11-20 23:36:38,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3068 states to 3068 states and 4483 transitions. [2021-11-20 23:36:38,330 INFO L78 Accepts]: Start accepts. Automaton has 3068 states and 4483 transitions. Word has length 486 [2021-11-20 23:36:38,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:36:38,331 INFO L470 AbstractCegarLoop]: Abstraction has 3068 states and 4483 transitions. [2021-11-20 23:36:38,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 32.875) internal successors, (263), 8 states have internal predecessors, (263), 2 states have call successors, (147), 2 states have call predecessors, (147), 2 states have return successors, (141), 2 states have call predecessors, (141), 2 states have call successors, (141) [2021-11-20 23:36:38,332 INFO L276 IsEmpty]: Start isEmpty. Operand 3068 states and 4483 transitions. [2021-11-20 23:36:38,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2021-11-20 23:36:38,356 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:38,357 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 8, 7, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:36:38,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 23:36:38,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-20 23:36:38,575 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:36:38,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:38,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1064522640, now seen corresponding path program 2 times [2021-11-20 23:36:38,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:36:38,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583865262] [2021-11-20 23:36:38,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:38,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:36:38,771 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:36:38,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [915430450] [2021-11-20 23:36:38,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 23:36:38,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:36:38,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:36:38,787 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:36:38,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afe45cd-1b81-41b0-9457-148cbdbe4d43/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process